ieee80211_node.c revision 187898
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 187898 2009-01-29 23:11:18Z sam $"); 29 30#include "opt_wlan.h" 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/mbuf.h> 35#include <sys/malloc.h> 36#include <sys/kernel.h> 37 38#include <sys/socket.h> 39 40#include <net/if.h> 41#include <net/if_media.h> 42#include <net/ethernet.h> 43 44#include <net80211/ieee80211_var.h> 45#include <net80211/ieee80211_input.h> 46#ifdef IEEE80211_SUPPORT_TDMA 47#include <net80211/ieee80211_tdma.h> 48#endif 49#include <net80211/ieee80211_wds.h> 50 51#include <net/bpf.h> 52 53/* 54 * Association id's are managed with a bit vector. 55 */ 56#define IEEE80211_AID_SET(_vap, b) \ 57 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 58 (1 << (IEEE80211_AID(b) % 32))) 59#define IEEE80211_AID_CLR(_vap, b) \ 60 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 61 ~(1 << (IEEE80211_AID(b) % 32))) 62#define IEEE80211_AID_ISSET(_vap, b) \ 63 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 64 65#ifdef IEEE80211_DEBUG_REFCNT 66#define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line 67#else 68#define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__ 69#endif 70 71static int ieee80211_sta_join1(struct ieee80211_node *); 72 73static struct ieee80211_node *node_alloc(struct ieee80211vap *, 74 const uint8_t [IEEE80211_ADDR_LEN]); 75static void node_cleanup(struct ieee80211_node *); 76static void node_free(struct ieee80211_node *); 77static void node_age(struct ieee80211_node *); 78static int8_t node_getrssi(const struct ieee80211_node *); 79static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 80static void node_getmimoinfo(const struct ieee80211_node *, 81 struct ieee80211_mimo_info *); 82 83static void _ieee80211_free_node(struct ieee80211_node *); 84 85static void ieee80211_node_table_init(struct ieee80211com *ic, 86 struct ieee80211_node_table *nt, const char *name, 87 int inact, int keymaxix); 88static void ieee80211_node_table_reset(struct ieee80211_node_table *, 89 struct ieee80211vap *); 90static void ieee80211_node_reclaim(struct ieee80211_node *); 91static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 92static void ieee80211_erp_timeout(struct ieee80211com *); 93 94MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 95MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 96 97void 98ieee80211_node_attach(struct ieee80211com *ic) 99{ 100 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 101 IEEE80211_INACT_INIT, ic->ic_max_keyix); 102 callout_init(&ic->ic_inact, CALLOUT_MPSAFE); 103 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 104 ieee80211_node_timeout, ic); 105 106 ic->ic_node_alloc = node_alloc; 107 ic->ic_node_free = node_free; 108 ic->ic_node_cleanup = node_cleanup; 109 ic->ic_node_age = node_age; 110 ic->ic_node_drain = node_age; /* NB: same as age */ 111 ic->ic_node_getrssi = node_getrssi; 112 ic->ic_node_getsignal = node_getsignal; 113 ic->ic_node_getmimoinfo = node_getmimoinfo; 114 115 /* 116 * Set flags to be propagated to all vap's; 117 * these define default behaviour/configuration. 118 */ 119 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 120} 121 122void 123ieee80211_node_detach(struct ieee80211com *ic) 124{ 125 126 callout_drain(&ic->ic_inact); 127 ieee80211_node_table_cleanup(&ic->ic_sta); 128} 129 130void 131ieee80211_node_vattach(struct ieee80211vap *vap) 132{ 133 /* NB: driver can override */ 134 vap->iv_max_aid = IEEE80211_AID_DEF; 135 136 /* default station inactivity timer setings */ 137 vap->iv_inact_init = IEEE80211_INACT_INIT; 138 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 139 vap->iv_inact_run = IEEE80211_INACT_RUN; 140 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 141 142 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 143 "%s: init %u auth %u run %u probe %u\n", __func__, 144 vap->iv_inact_init, vap->iv_inact_auth, 145 vap->iv_inact_run, vap->iv_inact_probe); 146} 147 148void 149ieee80211_node_latevattach(struct ieee80211vap *vap) 150{ 151 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 152 /* XXX should we allow max aid to be zero? */ 153 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 154 vap->iv_max_aid = IEEE80211_AID_MIN; 155 if_printf(vap->iv_ifp, 156 "WARNING: max aid too small, changed to %d\n", 157 vap->iv_max_aid); 158 } 159 vap->iv_aid_bitmap = (uint32_t *) malloc( 160 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 161 M_80211_NODE, M_NOWAIT | M_ZERO); 162 if (vap->iv_aid_bitmap == NULL) { 163 /* XXX no way to recover */ 164 printf("%s: no memory for AID bitmap, max aid %d!\n", 165 __func__, vap->iv_max_aid); 166 vap->iv_max_aid = 0; 167 } 168 } 169 170 ieee80211_reset_bss(vap); 171 172 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 173} 174 175void 176ieee80211_node_vdetach(struct ieee80211vap *vap) 177{ 178 struct ieee80211com *ic = vap->iv_ic; 179 180 ieee80211_node_table_reset(&ic->ic_sta, vap); 181 if (vap->iv_bss != NULL) { 182 ieee80211_free_node(vap->iv_bss); 183 vap->iv_bss = NULL; 184 } 185 if (vap->iv_aid_bitmap != NULL) { 186 free(vap->iv_aid_bitmap, M_80211_NODE); 187 vap->iv_aid_bitmap = NULL; 188 } 189} 190 191/* 192 * Port authorize/unauthorize interfaces for use by an authenticator. 193 */ 194 195void 196ieee80211_node_authorize(struct ieee80211_node *ni) 197{ 198 struct ieee80211vap *vap = ni->ni_vap; 199 200 ni->ni_flags |= IEEE80211_NODE_AUTH; 201 ni->ni_inact_reload = vap->iv_inact_run; 202 ni->ni_inact = ni->ni_inact_reload; 203 204 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 205 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 206} 207 208void 209ieee80211_node_unauthorize(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_auth; 215 if (ni->ni_inact > ni->ni_inact_reload) 216 ni->ni_inact = ni->ni_inact_reload; 217 218 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 219 "%s: inact_reload %u inact %u", __func__, 220 ni->ni_inact_reload, ni->ni_inact); 221} 222 223/* 224 * Fix tx parameters for a node according to ``association state''. 225 */ 226static void 227node_setuptxparms(struct ieee80211_node *ni) 228{ 229 struct ieee80211vap *vap = ni->ni_vap; 230 enum ieee80211_phymode mode; 231 232 if (ni->ni_flags & IEEE80211_NODE_HT) { 233 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 234 mode = IEEE80211_MODE_11NA; 235 else 236 mode = IEEE80211_MODE_11NG; 237 } else { /* legacy rate handling */ 238 /* NB: 108A/108G should be handled as 11a/11g respectively */ 239 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 240 mode = IEEE80211_MODE_STURBO_A; 241 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 242 mode = IEEE80211_MODE_11A; 243 else if (ni->ni_flags & IEEE80211_NODE_ERP) 244 mode = IEEE80211_MODE_11G; 245 else 246 mode = IEEE80211_MODE_11B; 247 } 248 ni->ni_txparms = &vap->iv_txparms[mode]; 249} 250 251/* 252 * Set/change the channel. The rate set is also updated as 253 * to insure a consistent view by drivers. 254 * XXX should be private but hostap needs it to deal with CSA 255 */ 256void 257ieee80211_node_set_chan(struct ieee80211_node *ni, 258 struct ieee80211_channel *chan) 259{ 260 struct ieee80211com *ic = ni->ni_ic; 261 struct ieee80211vap *vap = ni->ni_vap; 262 enum ieee80211_phymode mode; 263 264 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 265 266 ni->ni_chan = chan; 267 mode = ieee80211_chan2mode(chan); 268 if (IEEE80211_IS_CHAN_HT(chan)) { 269 /* 270 * XXX Gotta be careful here; the rate set returned by 271 * ieee80211_get_suprates is actually any HT rate 272 * set so blindly copying it will be bad. We must 273 * install the legacy rate est in ni_rates and the 274 * HT rate set in ni_htrates. 275 */ 276 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 277 /* 278 * Setup bss tx parameters based on operating mode. We 279 * use legacy rates when operating in a mixed HT+non-HT bss 280 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 281 */ 282 if (mode == IEEE80211_MODE_11NA && 283 (vap->iv_flags_ext & IEEE80211_FEXT_PUREN) == 0) 284 mode = IEEE80211_MODE_11A; 285 else if (mode == IEEE80211_MODE_11NG && 286 (vap->iv_flags_ext & IEEE80211_FEXT_PUREN) == 0) 287 mode = IEEE80211_MODE_11G; 288 if (mode == IEEE80211_MODE_11G && 289 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 290 mode = IEEE80211_MODE_11B; 291 } 292 ni->ni_txparms = &vap->iv_txparms[mode]; 293 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 294} 295 296static __inline void 297copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 298{ 299 /* propagate useful state */ 300 nbss->ni_authmode = obss->ni_authmode; 301 nbss->ni_txpower = obss->ni_txpower; 302 nbss->ni_vlan = obss->ni_vlan; 303 /* XXX statistics? */ 304 /* XXX legacy WDS bssid? */ 305} 306 307void 308ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 309{ 310 struct ieee80211com *ic = vap->iv_ic; 311 struct ieee80211_node *ni; 312 313 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 314 "%s: creating ibss on channel %u\n", __func__, 315 ieee80211_chan2ieee(ic, chan)); 316 317 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 318 if (ni == NULL) { 319 /* XXX recovery? */ 320 return; 321 } 322 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 323 ni->ni_esslen = vap->iv_des_ssid[0].len; 324 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 325 if (vap->iv_bss != NULL) 326 copy_bss(ni, vap->iv_bss); 327 ni->ni_intval = ic->ic_bintval; 328 if (vap->iv_flags & IEEE80211_F_PRIVACY) 329 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 330 if (ic->ic_phytype == IEEE80211_T_FH) { 331 ni->ni_fhdwell = 200; /* XXX */ 332 ni->ni_fhindex = 1; 333 } 334 if (vap->iv_opmode == IEEE80211_M_IBSS) { 335 vap->iv_flags |= IEEE80211_F_SIBSS; 336 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 337 if (vap->iv_flags & IEEE80211_F_DESBSSID) 338 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 339 else { 340 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 341 /* clear group bit, add local bit */ 342 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 343 } 344 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 345 if (vap->iv_flags & IEEE80211_F_DESBSSID) 346 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 347 else 348#ifdef IEEE80211_SUPPORT_TDMA 349 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 350#endif 351 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 352 } 353 /* 354 * Fix the channel and related attributes. 355 */ 356 /* clear DFS CAC state on previous channel */ 357 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 358 ic->ic_bsschan->ic_freq != chan->ic_freq && 359 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 360 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 361 ic->ic_bsschan = chan; 362 ieee80211_node_set_chan(ni, chan); 363 ic->ic_curmode = ieee80211_chan2mode(chan); 364 /* 365 * Do mode-specific setup. 366 */ 367 if (IEEE80211_IS_CHAN_FULL(chan)) { 368 if (IEEE80211_IS_CHAN_ANYG(chan)) { 369 /* 370 * Use a mixed 11b/11g basic rate set. 371 */ 372 ieee80211_setbasicrates(&ni->ni_rates, 373 IEEE80211_MODE_11G); 374 if (vap->iv_flags & IEEE80211_F_PUREG) { 375 /* 376 * Also mark OFDM rates basic so 11b 377 * stations do not join (WiFi compliance). 378 */ 379 ieee80211_addbasicrates(&ni->ni_rates, 380 IEEE80211_MODE_11A); 381 } 382 } else if (IEEE80211_IS_CHAN_B(chan)) { 383 /* 384 * Force pure 11b rate set. 385 */ 386 ieee80211_setbasicrates(&ni->ni_rates, 387 IEEE80211_MODE_11B); 388 } 389 } 390 391 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 392} 393 394/* 395 * Reset bss state on transition to the INIT state. 396 * Clear any stations from the table (they have been 397 * deauth'd) and reset the bss node (clears key, rate 398 * etc. state). 399 */ 400void 401ieee80211_reset_bss(struct ieee80211vap *vap) 402{ 403 struct ieee80211com *ic = vap->iv_ic; 404 struct ieee80211_node *ni, *obss; 405 406 ieee80211_node_table_reset(&ic->ic_sta, vap); 407 /* XXX multi-bss: wrong */ 408 ieee80211_reset_erp(ic); 409 410 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 411 KASSERT(ni != NULL, ("unable to setup inital BSS node")); 412 obss = vap->iv_bss; 413 vap->iv_bss = ieee80211_ref_node(ni); 414 if (obss != NULL) { 415 copy_bss(ni, obss); 416 ni->ni_intval = ic->ic_bintval; 417 ieee80211_free_node(obss); 418 } else 419 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 420} 421 422static int 423match_ssid(const struct ieee80211_node *ni, 424 int nssid, const struct ieee80211_scan_ssid ssids[]) 425{ 426 int i; 427 428 for (i = 0; i < nssid; i++) { 429 if (ni->ni_esslen == ssids[i].len && 430 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 431 return 1; 432 } 433 return 0; 434} 435 436/* 437 * Test a node for suitability/compatibility. 438 */ 439static int 440check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 441{ 442 struct ieee80211com *ic = ni->ni_ic; 443 uint8_t rate; 444 445 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 446 return 0; 447 if (vap->iv_opmode == IEEE80211_M_IBSS) { 448 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 449 return 0; 450 } else { 451 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 452 return 0; 453 } 454 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 455 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 456 return 0; 457 } else { 458 /* XXX does this mean privacy is supported or required? */ 459 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 460 return 0; 461 } 462 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 463 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 464 if (rate & IEEE80211_RATE_BASIC) 465 return 0; 466 if (vap->iv_des_nssid != 0 && 467 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 468 return 0; 469 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 470 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 471 return 0; 472 return 1; 473} 474 475#ifdef IEEE80211_DEBUG 476/* 477 * Display node suitability/compatibility. 478 */ 479static void 480check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 481{ 482 struct ieee80211com *ic = ni->ni_ic; 483 uint8_t rate; 484 int fail; 485 486 fail = 0; 487 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 488 fail |= 0x01; 489 if (vap->iv_opmode == IEEE80211_M_IBSS) { 490 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 491 fail |= 0x02; 492 } else { 493 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 494 fail |= 0x02; 495 } 496 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 497 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 498 fail |= 0x04; 499 } else { 500 /* XXX does this mean privacy is supported or required? */ 501 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 502 fail |= 0x04; 503 } 504 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 505 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 506 if (rate & IEEE80211_RATE_BASIC) 507 fail |= 0x08; 508 if (vap->iv_des_nssid != 0 && 509 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 510 fail |= 0x10; 511 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 512 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 513 fail |= 0x20; 514 515 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 516 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 517 printf(" %3d%c", 518 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 519 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 520 fail & 0x08 ? '!' : ' '); 521 printf(" %4s%c", 522 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 523 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 524 "????", 525 fail & 0x02 ? '!' : ' '); 526 printf(" %3s%c ", 527 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 528 fail & 0x04 ? '!' : ' '); 529 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 530 printf("%s\n", fail & 0x10 ? "!" : ""); 531} 532#endif /* IEEE80211_DEBUG */ 533 534/* 535 * Handle 802.11 ad hoc network merge. The 536 * convention, set by the Wireless Ethernet Compatibility Alliance 537 * (WECA), is that an 802.11 station will change its BSSID to match 538 * the "oldest" 802.11 ad hoc network, on the same channel, that 539 * has the station's desired SSID. The "oldest" 802.11 network 540 * sends beacons with the greatest TSF timestamp. 541 * 542 * The caller is assumed to validate TSF's before attempting a merge. 543 * 544 * Return !0 if the BSSID changed, 0 otherwise. 545 */ 546int 547ieee80211_ibss_merge(struct ieee80211_node *ni) 548{ 549 struct ieee80211vap *vap = ni->ni_vap; 550#ifdef IEEE80211_DEBUG 551 struct ieee80211com *ic = ni->ni_ic; 552#endif 553 554 if (ni == vap->iv_bss || 555 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 556 /* unchanged, nothing to do */ 557 return 0; 558 } 559 if (!check_bss(vap, ni)) { 560 /* capabilities mismatch */ 561 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 562 "%s: merge failed, capabilities mismatch\n", __func__); 563#ifdef IEEE80211_DEBUG 564 if (ieee80211_msg_assoc(vap)) 565 check_bss_debug(vap, ni); 566#endif 567 vap->iv_stats.is_ibss_capmismatch++; 568 return 0; 569 } 570 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 571 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 572 ether_sprintf(ni->ni_bssid), 573 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 574 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 575 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 576 ); 577 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 578} 579 580/* 581 * Calculate HT channel promotion flags for all vaps. 582 * This assumes ni_chan have been setup for each vap. 583 */ 584static int 585gethtadjustflags(struct ieee80211com *ic) 586{ 587 struct ieee80211vap *vap; 588 int flags; 589 590 flags = 0; 591 /* XXX locking */ 592 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 593 if (vap->iv_state < IEEE80211_S_RUN) 594 continue; 595 switch (vap->iv_opmode) { 596 case IEEE80211_M_WDS: 597 case IEEE80211_M_STA: 598 case IEEE80211_M_AHDEMO: 599 case IEEE80211_M_HOSTAP: 600 case IEEE80211_M_IBSS: 601 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 602 break; 603 default: 604 break; 605 } 606 } 607 return flags; 608} 609 610/* 611 * Check if the current channel needs to change based on whether 612 * any vap's are using HT20/HT40. This is used to sync the state 613 * of ic_curchan after a channel width change on a running vap. 614 */ 615void 616ieee80211_sync_curchan(struct ieee80211com *ic) 617{ 618 struct ieee80211_channel *c; 619 620 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 621 if (c != ic->ic_curchan) { 622 ic->ic_curchan = c; 623 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 624 ic->ic_set_channel(ic); 625 } 626} 627 628/* 629 * Change the current channel. The request channel may be 630 * promoted if other vap's are operating with HT20/HT40. 631 */ 632void 633ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 634{ 635 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 636 int flags = gethtadjustflags(ic); 637 /* 638 * Check for channel promotion required to support the 639 * set of running vap's. This assumes we are called 640 * after ni_chan is setup for each vap. 641 */ 642 /* NB: this assumes IEEE80211_FEXT_USEHT40 > IEEE80211_FEXT_HT */ 643 if (flags > ieee80211_htchanflags(c)) 644 c = ieee80211_ht_adjust_channel(ic, c, flags); 645 } 646 ic->ic_bsschan = ic->ic_curchan = c; 647 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 648 ic->ic_set_channel(ic); 649} 650 651/* 652 * Join the specified IBSS/BSS network. The node is assumed to 653 * be passed in with a held reference. 654 */ 655static int 656ieee80211_sta_join1(struct ieee80211_node *selbs) 657{ 658 struct ieee80211vap *vap = selbs->ni_vap; 659 struct ieee80211com *ic = selbs->ni_ic; 660 struct ieee80211_node *obss; 661 int canreassoc; 662 663 /* 664 * Committed to selbs, setup state. 665 */ 666 obss = vap->iv_bss; 667 /* 668 * Check if old+new node have the same address in which 669 * case we can reassociate when operating in sta mode. 670 */ 671 canreassoc = (obss != NULL && 672 vap->iv_state == IEEE80211_S_RUN && 673 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 674 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 675 if (obss != NULL) { 676 copy_bss(selbs, obss); 677 ieee80211_node_reclaim(obss); 678 obss = NULL; /* NB: guard against later use */ 679 } 680 681 /* 682 * Delete unusable rates; we've already checked 683 * that the negotiated rate set is acceptable. 684 */ 685 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 686 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 687 688 ieee80211_setcurchan(ic, selbs->ni_chan); 689 /* 690 * Set the erp state (mostly the slot time) to deal with 691 * the auto-select case; this should be redundant if the 692 * mode is locked. 693 */ 694 ieee80211_reset_erp(ic); 695 ieee80211_wme_initparams(vap); 696 697 if (vap->iv_opmode == IEEE80211_M_STA) { 698 if (canreassoc) { 699 /* Reassociate */ 700 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 701 } else { 702 /* 703 * Act as if we received a DEAUTH frame in case we 704 * are invoked from the RUN state. This will cause 705 * us to try to re-authenticate if we are operating 706 * as a station. 707 */ 708 ieee80211_new_state(vap, IEEE80211_S_AUTH, 709 IEEE80211_FC0_SUBTYPE_DEAUTH); 710 } 711 } else 712 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 713 return 1; 714} 715 716int 717ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 718 const struct ieee80211_scan_entry *se) 719{ 720 struct ieee80211com *ic = vap->iv_ic; 721 struct ieee80211_node *ni; 722 723 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 724 if (ni == NULL) { 725 /* XXX msg */ 726 return 0; 727 } 728 /* 729 * Expand scan state into node's format. 730 * XXX may not need all this stuff 731 */ 732 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 733 ni->ni_esslen = se->se_ssid[1]; 734 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 735 ni->ni_rstamp = se->se_rstamp; 736 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 737 ni->ni_intval = se->se_intval; 738 ni->ni_capinfo = se->se_capinfo; 739 ni->ni_chan = chan; 740 ni->ni_timoff = se->se_timoff; 741 ni->ni_fhdwell = se->se_fhdwell; 742 ni->ni_fhindex = se->se_fhindex; 743 ni->ni_erp = se->se_erp; 744 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 745 ni->ni_noise = se->se_noise; 746 if (vap->iv_opmode == IEEE80211_M_STA) { 747 /* NB: only infrastructure mode requires an associd */ 748 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 749 } 750 751 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 752 ieee80211_ies_expand(&ni->ni_ies); 753 if (ni->ni_ies.ath_ie != NULL) 754 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 755 if (ni->ni_ies.htcap_ie != NULL) 756 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 757 if (ni->ni_ies.htinfo_ie != NULL) 758 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 759#ifdef IEEE80211_SUPPORT_TDMA 760 if (ni->ni_ies.tdma_ie != NULL) 761 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 762#endif 763 } 764 765 vap->iv_dtim_period = se->se_dtimperiod; 766 vap->iv_dtim_count = 0; 767 768 /* NB: must be after ni_chan is setup */ 769 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 770 IEEE80211_F_DOSORT); 771 if (ieee80211_iserp_rateset(&ni->ni_rates)) 772 ni->ni_flags |= IEEE80211_NODE_ERP; 773 node_setuptxparms(ni); 774 775 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 776} 777 778/* 779 * Leave the specified IBSS/BSS network. The node is assumed to 780 * be passed in with a held reference. 781 */ 782void 783ieee80211_sta_leave(struct ieee80211_node *ni) 784{ 785 struct ieee80211com *ic = ni->ni_ic; 786 787 ic->ic_node_cleanup(ni); 788 ieee80211_notify_node_leave(ni); 789} 790 791/* 792 * Send a deauthenticate frame and drop the station. 793 */ 794void 795ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 796{ 797 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */ 798 ieee80211_ref_node(ni); 799 if (ni->ni_associd != 0) 800 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 801 ieee80211_node_leave(ni); 802 ieee80211_free_node(ni); 803} 804 805static struct ieee80211_node * 806node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 807{ 808 struct ieee80211_node *ni; 809 810 ni = (struct ieee80211_node *) malloc(sizeof(struct ieee80211_node), 811 M_80211_NODE, M_NOWAIT | M_ZERO); 812 return ni; 813} 814 815/* 816 * Initialize an ie blob with the specified data. If previous 817 * data exists re-use the data block. As a side effect we clear 818 * all references to specific ie's; the caller is required to 819 * recalculate them. 820 */ 821int 822ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 823{ 824 /* NB: assumes data+len are the last fields */ 825 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 826 if (ies->data != NULL && ies->len != len) { 827 /* data size changed */ 828 free(ies->data, M_80211_NODE_IE); 829 ies->data = NULL; 830 } 831 if (ies->data == NULL) { 832 ies->data = (uint8_t *) malloc(len, M_80211_NODE_IE, M_NOWAIT); 833 if (ies->data == NULL) { 834 ies->len = 0; 835 /* NB: pointers have already been zero'd above */ 836 return 0; 837 } 838 } 839 memcpy(ies->data, data, len); 840 ies->len = len; 841 return 1; 842} 843 844/* 845 * Reclaim storage for an ie blob. 846 */ 847void 848ieee80211_ies_cleanup(struct ieee80211_ies *ies) 849{ 850 if (ies->data != NULL) 851 free(ies->data, M_80211_NODE_IE); 852} 853 854/* 855 * Expand an ie blob data contents and to fillin individual 856 * ie pointers. The data blob is assumed to be well-formed; 857 * we don't do any validity checking of ie lengths. 858 */ 859void 860ieee80211_ies_expand(struct ieee80211_ies *ies) 861{ 862 uint8_t *ie; 863 int ielen; 864 865 ie = ies->data; 866 ielen = ies->len; 867 while (ielen > 0) { 868 switch (ie[0]) { 869 case IEEE80211_ELEMID_VENDOR: 870 if (iswpaoui(ie)) 871 ies->wpa_ie = ie; 872 else if (iswmeoui(ie)) 873 ies->wme_ie = ie; 874 else if (isatherosoui(ie)) 875 ies->ath_ie = ie; 876#ifdef IEEE80211_SUPPORT_TDMA 877 else if (istdmaoui(ie)) 878 ies->tdma_ie = ie; 879#endif 880 break; 881 case IEEE80211_ELEMID_RSN: 882 ies->rsn_ie = ie; 883 break; 884 case IEEE80211_ELEMID_HTCAP: 885 ies->htcap_ie = ie; 886 break; 887 } 888 ielen -= 2 + ie[1]; 889 ie += 2 + ie[1]; 890 } 891} 892 893/* 894 * Reclaim any resources in a node and reset any critical 895 * state. Typically nodes are free'd immediately after, 896 * but in some cases the storage may be reused so we need 897 * to insure consistent state (should probably fix that). 898 */ 899static void 900node_cleanup(struct ieee80211_node *ni) 901{ 902#define N(a) (sizeof(a)/sizeof(a[0])) 903 struct ieee80211vap *vap = ni->ni_vap; 904 int i; 905 906 /* NB: preserve ni_table */ 907 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 908 if (vap->iv_opmode != IEEE80211_M_STA) 909 vap->iv_ps_sta--; 910 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 911 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 912 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 913 } 914 /* 915 * Cleanup any HT-related state. 916 */ 917 if (ni->ni_flags & IEEE80211_NODE_HT) 918 ieee80211_ht_node_cleanup(ni); 919 /* 920 * Clear AREF flag that marks the authorization refcnt bump 921 * has happened. This is probably not needed as the node 922 * should always be removed from the table so not found but 923 * do it just in case. 924 * Likewise clear the ASSOCID flag as these flags are intended 925 * to be managed in tandem. 926 */ 927 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 928 929 /* 930 * Drain power save queue and, if needed, clear TIM. 931 */ 932 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 933 vap->iv_set_tim(ni, 0); 934 935 ni->ni_associd = 0; 936 if (ni->ni_challenge != NULL) { 937 free(ni->ni_challenge, M_80211_NODE); 938 ni->ni_challenge = NULL; 939 } 940 /* 941 * Preserve SSID, WPA, and WME ie's so the bss node is 942 * reusable during a re-auth/re-assoc state transition. 943 * If we remove these data they will not be recreated 944 * because they come from a probe-response or beacon frame 945 * which cannot be expected prior to the association-response. 946 * This should not be an issue when operating in other modes 947 * as stations leaving always go through a full state transition 948 * which will rebuild this state. 949 * 950 * XXX does this leave us open to inheriting old state? 951 */ 952 for (i = 0; i < N(ni->ni_rxfrag); i++) 953 if (ni->ni_rxfrag[i] != NULL) { 954 m_freem(ni->ni_rxfrag[i]); 955 ni->ni_rxfrag[i] = NULL; 956 } 957 /* 958 * Must be careful here to remove any key map entry w/o a LOR. 959 */ 960 ieee80211_node_delucastkey(ni); 961#undef N 962} 963 964static void 965node_free(struct ieee80211_node *ni) 966{ 967 struct ieee80211com *ic = ni->ni_ic; 968 969 ic->ic_node_cleanup(ni); 970 ieee80211_ies_cleanup(&ni->ni_ies); 971 ieee80211_psq_cleanup(&ni->ni_psq); 972 IEEE80211_NODE_WDSQ_DESTROY(ni); 973 free(ni, M_80211_NODE); 974} 975 976static void 977node_age(struct ieee80211_node *ni) 978{ 979 struct ieee80211vap *vap = ni->ni_vap; 980 981 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta); 982 983 /* 984 * Age frames on the power save queue. 985 */ 986 if (ieee80211_node_psq_age(ni) != 0 && 987 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 988 vap->iv_set_tim(ni, 0); 989 /* 990 * Age frames on the wds pending queue. 991 */ 992 if (IEEE80211_NODE_WDSQ_QLEN(ni) != 0) 993 ieee80211_node_wdsq_age(ni); 994 /* 995 * Age out HT resources (e.g. frames on the 996 * A-MPDU reorder queues). 997 */ 998 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 999 ieee80211_ht_node_age(ni); 1000} 1001 1002static int8_t 1003node_getrssi(const struct ieee80211_node *ni) 1004{ 1005 uint32_t avgrssi = ni->ni_avgrssi; 1006 int32_t rssi; 1007 1008 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1009 return 0; 1010 rssi = IEEE80211_RSSI_GET(avgrssi); 1011 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1012} 1013 1014static void 1015node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1016{ 1017 *rssi = node_getrssi(ni); 1018 *noise = ni->ni_noise; 1019} 1020 1021static void 1022node_getmimoinfo(const struct ieee80211_node *ni, 1023 struct ieee80211_mimo_info *info) 1024{ 1025 /* XXX zero data? */ 1026} 1027 1028struct ieee80211_node * 1029ieee80211_alloc_node(struct ieee80211_node_table *nt, 1030 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1031{ 1032 struct ieee80211com *ic = nt->nt_ic; 1033 struct ieee80211_node *ni; 1034 int hash; 1035 1036 ni = ic->ic_node_alloc(vap, macaddr); 1037 if (ni == NULL) { 1038 vap->iv_stats.is_rx_nodealloc++; 1039 return NULL; 1040 } 1041 1042 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1043 "%s %p<%s> in %s table\n", __func__, ni, 1044 ether_sprintf(macaddr), nt->nt_name); 1045 1046 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1047 hash = IEEE80211_NODE_HASH(macaddr); 1048 ieee80211_node_initref(ni); /* mark referenced */ 1049 ni->ni_chan = IEEE80211_CHAN_ANYC; 1050 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1051 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1052 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1053 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1054 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1055 ni->ni_inact_reload = nt->nt_inact_init; 1056 ni->ni_inact = ni->ni_inact_reload; 1057 ni->ni_ath_defkeyix = 0x7fff; 1058 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1059 IEEE80211_NODE_WDSQ_INIT(ni, "unknown"); 1060 1061 IEEE80211_NODE_LOCK(nt); 1062 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1063 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1064 ni->ni_table = nt; 1065 ni->ni_vap = vap; 1066 ni->ni_ic = ic; 1067 IEEE80211_NODE_UNLOCK(nt); 1068 1069 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1070 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1071 1072 return ni; 1073} 1074 1075/* 1076 * Craft a temporary node suitable for sending a management frame 1077 * to the specified station. We craft only as much state as we 1078 * need to do the work since the node will be immediately reclaimed 1079 * once the send completes. 1080 */ 1081struct ieee80211_node * 1082ieee80211_tmp_node(struct ieee80211vap *vap, 1083 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1084{ 1085 struct ieee80211com *ic = vap->iv_ic; 1086 struct ieee80211_node *ni; 1087 1088 ni = ic->ic_node_alloc(vap, macaddr); 1089 if (ni != NULL) { 1090 struct ieee80211_node *bss = vap->iv_bss; 1091 1092 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1093 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1094 1095 ni->ni_table = NULL; /* NB: pedantic */ 1096 ni->ni_ic = ic; /* NB: needed to set channel */ 1097 ni->ni_vap = vap; 1098 1099 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1100 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1101 ieee80211_node_initref(ni); /* mark referenced */ 1102 /* NB: required by ieee80211_fix_rate */ 1103 ieee80211_node_set_chan(ni, bss->ni_chan); 1104 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1105 IEEE80211_KEYIX_NONE); 1106 ni->ni_txpower = bss->ni_txpower; 1107 /* XXX optimize away */ 1108 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1109 IEEE80211_NODE_WDSQ_INIT(ni, "unknown"); 1110 } else { 1111 /* XXX msg */ 1112 vap->iv_stats.is_rx_nodealloc++; 1113 } 1114 return ni; 1115} 1116 1117struct ieee80211_node * 1118ieee80211_dup_bss(struct ieee80211vap *vap, 1119 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1120{ 1121 struct ieee80211com *ic = vap->iv_ic; 1122 struct ieee80211_node *ni; 1123 1124 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1125 if (ni != NULL) { 1126 struct ieee80211_node *bss = vap->iv_bss; 1127 /* 1128 * Inherit from iv_bss. 1129 */ 1130 copy_bss(ni, bss); 1131 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1132 ieee80211_node_set_chan(ni, bss->ni_chan); 1133 } 1134 return ni; 1135} 1136 1137/* 1138 * Create a bss node for a legacy WDS vap. The far end does 1139 * not associate so we just create create a new node and 1140 * simulate an association. The caller is responsible for 1141 * installing the node as the bss node and handling any further 1142 * setup work like authorizing the port. 1143 */ 1144struct ieee80211_node * 1145ieee80211_node_create_wds(struct ieee80211vap *vap, 1146 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1147{ 1148 struct ieee80211com *ic = vap->iv_ic; 1149 struct ieee80211_node *ni; 1150 1151 /* XXX check if node already in sta table? */ 1152 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1153 if (ni != NULL) { 1154 ni->ni_wdsvap = vap; 1155 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1156 /* 1157 * Inherit any manually configured settings. 1158 */ 1159 copy_bss(ni, vap->iv_bss); 1160 ieee80211_node_set_chan(ni, chan); 1161 /* NB: propagate ssid so available to WPA supplicant */ 1162 ni->ni_esslen = vap->iv_des_ssid[0].len; 1163 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1164 /* NB: no associd for peer */ 1165 /* 1166 * There are no management frames to use to 1167 * discover neighbor capabilities, so blindly 1168 * propagate the local configuration. 1169 */ 1170 if (vap->iv_flags & IEEE80211_F_WME) 1171 ni->ni_flags |= IEEE80211_NODE_QOS; 1172 if (vap->iv_flags & IEEE80211_F_FF) 1173 ni->ni_flags |= IEEE80211_NODE_FF; 1174 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1175 (vap->iv_flags_ext & IEEE80211_FEXT_HT)) { 1176 /* 1177 * Device is HT-capable and HT is enabled for 1178 * the vap; setup HT operation. On return 1179 * ni_chan will be adjusted to an HT channel. 1180 */ 1181 ieee80211_ht_wds_init(ni); 1182 } else { 1183 struct ieee80211_channel *c = ni->ni_chan; 1184 /* 1185 * Force a legacy channel to be used. 1186 */ 1187 c = ieee80211_find_channel(ic, 1188 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1189 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1190 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1191 ni->ni_chan = c; 1192 } 1193 } 1194 return ni; 1195} 1196 1197struct ieee80211_node * 1198#ifdef IEEE80211_DEBUG_REFCNT 1199ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1200 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1201#else 1202ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1203 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1204#endif 1205{ 1206 struct ieee80211_node *ni; 1207 int hash; 1208 1209 IEEE80211_NODE_LOCK_ASSERT(nt); 1210 1211 hash = IEEE80211_NODE_HASH(macaddr); 1212 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1213 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1214 ieee80211_ref_node(ni); /* mark referenced */ 1215#ifdef IEEE80211_DEBUG_REFCNT 1216 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1217 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1218 func, line, 1219 ni, ether_sprintf(ni->ni_macaddr), 1220 ieee80211_node_refcnt(ni)); 1221#endif 1222 return ni; 1223 } 1224 } 1225 return NULL; 1226} 1227 1228struct ieee80211_node * 1229#ifdef IEEE80211_DEBUG_REFCNT 1230ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1231 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1232#else 1233ieee80211_find_node(struct ieee80211_node_table *nt, 1234 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1235#endif 1236{ 1237 struct ieee80211_node *ni; 1238 1239 IEEE80211_NODE_LOCK(nt); 1240 ni = ieee80211_find_node_locked(nt, macaddr); 1241 IEEE80211_NODE_UNLOCK(nt); 1242 return ni; 1243} 1244 1245struct ieee80211_node * 1246#ifdef IEEE80211_DEBUG_REFCNT 1247ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1248 const struct ieee80211vap *vap, 1249 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1250#else 1251ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1252 const struct ieee80211vap *vap, 1253 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1254#endif 1255{ 1256 struct ieee80211_node *ni; 1257 int hash; 1258 1259 IEEE80211_NODE_LOCK_ASSERT(nt); 1260 1261 hash = IEEE80211_NODE_HASH(macaddr); 1262 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1263 if (ni->ni_vap == vap && 1264 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1265 ieee80211_ref_node(ni); /* mark referenced */ 1266#ifdef IEEE80211_DEBUG_REFCNT 1267 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1268 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1269 func, line, 1270 ni, ether_sprintf(ni->ni_macaddr), 1271 ieee80211_node_refcnt(ni)); 1272#endif 1273 return ni; 1274 } 1275 } 1276 return NULL; 1277} 1278 1279struct ieee80211_node * 1280#ifdef IEEE80211_DEBUG_REFCNT 1281ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1282 const struct ieee80211vap *vap, 1283 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1284#else 1285ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1286 const struct ieee80211vap *vap, 1287 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1288#endif 1289{ 1290 struct ieee80211_node *ni; 1291 1292 IEEE80211_NODE_LOCK(nt); 1293 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1294 IEEE80211_NODE_UNLOCK(nt); 1295 return ni; 1296} 1297 1298/* 1299 * Fake up a node; this handles node discovery in adhoc mode. 1300 * Note that for the driver's benefit we we treat this like 1301 * an association so the driver has an opportunity to setup 1302 * it's private state. 1303 */ 1304struct ieee80211_node * 1305ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1306 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1307{ 1308 struct ieee80211_node *ni; 1309 1310 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1311 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1312 ni = ieee80211_dup_bss(vap, macaddr); 1313 if (ni != NULL) { 1314 struct ieee80211com *ic = vap->iv_ic; 1315 1316 /* XXX no rate negotiation; just dup */ 1317 ni->ni_rates = vap->iv_bss->ni_rates; 1318 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1319 /* 1320 * In adhoc demo mode there are no management 1321 * frames to use to discover neighbor capabilities, 1322 * so blindly propagate the local configuration 1323 * so we can do interesting things (e.g. use 1324 * WME to disable ACK's). 1325 */ 1326 if (vap->iv_flags & IEEE80211_F_WME) 1327 ni->ni_flags |= IEEE80211_NODE_QOS; 1328 if (vap->iv_flags & IEEE80211_F_FF) 1329 ni->ni_flags |= IEEE80211_NODE_FF; 1330 } 1331 node_setuptxparms(ni); 1332 if (ic->ic_newassoc != NULL) 1333 ic->ic_newassoc(ni, 1); 1334 /* XXX not right for 802.1x/WPA */ 1335 ieee80211_node_authorize(ni); 1336 } 1337 return ni; 1338} 1339 1340void 1341ieee80211_init_neighbor(struct ieee80211_node *ni, 1342 const struct ieee80211_frame *wh, 1343 const struct ieee80211_scanparams *sp) 1344{ 1345 ni->ni_esslen = sp->ssid[1]; 1346 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1347 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1348 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1349 ni->ni_intval = sp->bintval; 1350 ni->ni_capinfo = sp->capinfo; 1351 ni->ni_chan = ni->ni_ic->ic_curchan; 1352 ni->ni_fhdwell = sp->fhdwell; 1353 ni->ni_fhindex = sp->fhindex; 1354 ni->ni_erp = sp->erp; 1355 ni->ni_timoff = sp->timoff; 1356 1357 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1358 ieee80211_ies_expand(&ni->ni_ies); 1359 if (ni->ni_ies.wme_ie != NULL) 1360 ni->ni_flags |= IEEE80211_NODE_QOS; 1361 else 1362 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1363 if (ni->ni_ies.ath_ie != NULL) 1364 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1365 } 1366 1367 /* NB: must be after ni_chan is setup */ 1368 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1369 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1370 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1371} 1372 1373/* 1374 * Do node discovery in adhoc mode on receipt of a beacon 1375 * or probe response frame. Note that for the driver's 1376 * benefit we we treat this like an association so the 1377 * driver has an opportunity to setup it's private state. 1378 */ 1379struct ieee80211_node * 1380ieee80211_add_neighbor(struct ieee80211vap *vap, 1381 const struct ieee80211_frame *wh, 1382 const struct ieee80211_scanparams *sp) 1383{ 1384 struct ieee80211_node *ni; 1385 1386 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1387 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1388 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1389 if (ni != NULL) { 1390 struct ieee80211com *ic = vap->iv_ic; 1391 1392 ieee80211_init_neighbor(ni, wh, sp); 1393 node_setuptxparms(ni); 1394 if (ic->ic_newassoc != NULL) 1395 ic->ic_newassoc(ni, 1); 1396 /* XXX not right for 802.1x/WPA */ 1397 ieee80211_node_authorize(ni); 1398 } 1399 return ni; 1400} 1401 1402#define IS_CTL(wh) \ 1403 ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1404#define IS_PSPOLL(wh) \ 1405 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1406#define IS_BAR(wh) \ 1407 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_BAR) 1408#define IS_PROBEREQ(wh) \ 1409 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1410 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1411#define IS_BCAST_PROBEREQ(wh) \ 1412 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1413 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1414 1415static __inline struct ieee80211_node * 1416_find_rxnode(struct ieee80211_node_table *nt, 1417 const struct ieee80211_frame_min *wh) 1418{ 1419 /* XXX 4-address frames? */ 1420 if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/) 1421 return ieee80211_find_node_locked(nt, wh->i_addr1); 1422 if (IS_BCAST_PROBEREQ(wh)) 1423 return NULL; /* spam bcast probe req to all vap's */ 1424 return ieee80211_find_node_locked(nt, wh->i_addr2); 1425} 1426 1427/* 1428 * Locate the node for sender, track state, and then pass the 1429 * (referenced) node up to the 802.11 layer for its use. Note 1430 * we can return NULL if the sender is not in the table. 1431 */ 1432struct ieee80211_node * 1433#ifdef IEEE80211_DEBUG_REFCNT 1434ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1435 const struct ieee80211_frame_min *wh, const char *func, int line) 1436#else 1437ieee80211_find_rxnode(struct ieee80211com *ic, 1438 const struct ieee80211_frame_min *wh) 1439#endif 1440{ 1441 struct ieee80211_node_table *nt; 1442 struct ieee80211_node *ni; 1443 1444 nt = &ic->ic_sta; 1445 IEEE80211_NODE_LOCK(nt); 1446 ni = _find_rxnode(nt, wh); 1447 IEEE80211_NODE_UNLOCK(nt); 1448 1449 return ni; 1450} 1451 1452/* 1453 * Like ieee80211_find_rxnode but use the supplied h/w 1454 * key index as a hint to locate the node in the key 1455 * mapping table. If an entry is present at the key 1456 * index we return it; otherwise do a normal lookup and 1457 * update the mapping table if the station has a unicast 1458 * key assigned to it. 1459 */ 1460struct ieee80211_node * 1461#ifdef IEEE80211_DEBUG_REFCNT 1462ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1463 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1464 const char *func, int line) 1465#else 1466ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1467 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1468#endif 1469{ 1470 struct ieee80211_node_table *nt; 1471 struct ieee80211_node *ni; 1472 1473 nt = &ic->ic_sta; 1474 IEEE80211_NODE_LOCK(nt); 1475 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1476 ni = nt->nt_keyixmap[keyix]; 1477 else 1478 ni = NULL; 1479 if (ni == NULL) { 1480 ni = _find_rxnode(nt, wh); 1481 if (ni != NULL && nt->nt_keyixmap != NULL) { 1482 /* 1483 * If the station has a unicast key cache slot 1484 * assigned update the key->node mapping table. 1485 */ 1486 keyix = ni->ni_ucastkey.wk_rxkeyix; 1487 /* XXX can keyixmap[keyix] != NULL? */ 1488 if (keyix < nt->nt_keyixmax && 1489 nt->nt_keyixmap[keyix] == NULL) { 1490 IEEE80211_DPRINTF(ni->ni_vap, 1491 IEEE80211_MSG_NODE, 1492 "%s: add key map entry %p<%s> refcnt %d\n", 1493 __func__, ni, ether_sprintf(ni->ni_macaddr), 1494 ieee80211_node_refcnt(ni)+1); 1495 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1496 } 1497 } 1498 } else { 1499 if (IS_BCAST_PROBEREQ(wh)) 1500 ni = NULL; /* spam bcast probe req to all vap's */ 1501 else 1502 ieee80211_ref_node(ni); 1503 } 1504 IEEE80211_NODE_UNLOCK(nt); 1505 1506 return ni; 1507} 1508#undef IS_BCAST_PROBEREQ 1509#undef IS_PROBEREQ 1510#undef IS_BAR 1511#undef IS_PSPOLL 1512#undef IS_CTL 1513 1514/* 1515 * Return a reference to the appropriate node for sending 1516 * a data frame. This handles node discovery in adhoc networks. 1517 */ 1518struct ieee80211_node * 1519#ifdef IEEE80211_DEBUG_REFCNT 1520ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1521 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1522 const char *func, int line) 1523#else 1524ieee80211_find_txnode(struct ieee80211vap *vap, 1525 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1526#endif 1527{ 1528 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1529 struct ieee80211_node *ni; 1530 1531 /* 1532 * The destination address should be in the node table 1533 * unless this is a multicast/broadcast frame. We can 1534 * also optimize station mode operation, all frames go 1535 * to the bss node. 1536 */ 1537 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1538 IEEE80211_NODE_LOCK(nt); 1539 if (vap->iv_opmode == IEEE80211_M_STA || 1540 vap->iv_opmode == IEEE80211_M_WDS || 1541 IEEE80211_IS_MULTICAST(macaddr)) 1542 ni = ieee80211_ref_node(vap->iv_bss); 1543 else 1544 ni = ieee80211_find_node_locked(nt, macaddr); 1545 IEEE80211_NODE_UNLOCK(nt); 1546 1547 if (ni == NULL) { 1548 if (vap->iv_opmode == IEEE80211_M_IBSS || 1549 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1550 /* 1551 * In adhoc mode cons up a node for the destination. 1552 * Note that we need an additional reference for the 1553 * caller to be consistent with 1554 * ieee80211_find_node_locked. 1555 */ 1556 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1557 if (ni != NULL) 1558 (void) ieee80211_ref_node(ni); 1559 } else { 1560 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1561 "no node, discard frame (%s)", __func__); 1562 vap->iv_stats.is_tx_nonode++; 1563 } 1564 } 1565 return ni; 1566} 1567 1568static void 1569_ieee80211_free_node(struct ieee80211_node *ni) 1570{ 1571 struct ieee80211_node_table *nt = ni->ni_table; 1572 1573 /* 1574 * NB: careful about referencing the vap as it may be 1575 * gone if the last reference was held by a driver. 1576 * We know the com will always be present so it's safe 1577 * to use ni_ic below to reclaim resources. 1578 */ 1579#if 0 1580 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1581 "%s %p<%s> in %s table\n", __func__, ni, 1582 ether_sprintf(ni->ni_macaddr), 1583 nt != NULL ? nt->nt_name : "<gone>"); 1584#endif 1585 if (ni->ni_associd != 0) { 1586 struct ieee80211vap *vap = ni->ni_vap; 1587 if (vap->iv_aid_bitmap != NULL) 1588 IEEE80211_AID_CLR(vap, ni->ni_associd); 1589 } 1590 if (nt != NULL) { 1591 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1592 LIST_REMOVE(ni, ni_hash); 1593 } 1594 ni->ni_ic->ic_node_free(ni); 1595} 1596 1597void 1598#ifdef IEEE80211_DEBUG_REFCNT 1599ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1600#else 1601ieee80211_free_node(struct ieee80211_node *ni) 1602#endif 1603{ 1604 struct ieee80211_node_table *nt = ni->ni_table; 1605 1606#ifdef IEEE80211_DEBUG_REFCNT 1607 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1608 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1609 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1610#endif 1611 if (nt != NULL) { 1612 IEEE80211_NODE_LOCK(nt); 1613 if (ieee80211_node_dectestref(ni)) { 1614 /* 1615 * Last reference, reclaim state. 1616 */ 1617 _ieee80211_free_node(ni); 1618 } else if (ieee80211_node_refcnt(ni) == 1 && 1619 nt->nt_keyixmap != NULL) { 1620 ieee80211_keyix keyix; 1621 /* 1622 * Check for a last reference in the key mapping table. 1623 */ 1624 keyix = ni->ni_ucastkey.wk_rxkeyix; 1625 if (keyix < nt->nt_keyixmax && 1626 nt->nt_keyixmap[keyix] == ni) { 1627 IEEE80211_DPRINTF(ni->ni_vap, 1628 IEEE80211_MSG_NODE, 1629 "%s: %p<%s> clear key map entry", __func__, 1630 ni, ether_sprintf(ni->ni_macaddr)); 1631 nt->nt_keyixmap[keyix] = NULL; 1632 ieee80211_node_decref(ni); /* XXX needed? */ 1633 _ieee80211_free_node(ni); 1634 } 1635 } 1636 IEEE80211_NODE_UNLOCK(nt); 1637 } else { 1638 if (ieee80211_node_dectestref(ni)) 1639 _ieee80211_free_node(ni); 1640 } 1641} 1642 1643/* 1644 * Reclaim a unicast key and clear any key cache state. 1645 */ 1646int 1647ieee80211_node_delucastkey(struct ieee80211_node *ni) 1648{ 1649 struct ieee80211com *ic = ni->ni_ic; 1650 struct ieee80211_node_table *nt = &ic->ic_sta; 1651 struct ieee80211_node *nikey; 1652 ieee80211_keyix keyix; 1653 int isowned, status; 1654 1655 /* 1656 * NB: We must beware of LOR here; deleting the key 1657 * can cause the crypto layer to block traffic updates 1658 * which can generate a LOR against the node table lock; 1659 * grab it here and stash the key index for our use below. 1660 * 1661 * Must also beware of recursion on the node table lock. 1662 * When called from node_cleanup we may already have 1663 * the node table lock held. Unfortunately there's no 1664 * way to separate out this path so we must do this 1665 * conditionally. 1666 */ 1667 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1668 if (!isowned) 1669 IEEE80211_NODE_LOCK(nt); 1670 nikey = NULL; 1671 status = 1; /* NB: success */ 1672 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1673 keyix = ni->ni_ucastkey.wk_rxkeyix; 1674 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1675 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1676 nikey = nt->nt_keyixmap[keyix]; 1677 nt->nt_keyixmap[keyix] = NULL;; 1678 } 1679 } 1680 if (!isowned) 1681 IEEE80211_NODE_UNLOCK(nt); 1682 1683 if (nikey != NULL) { 1684 KASSERT(nikey == ni, 1685 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1686 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1687 "%s: delete key map entry %p<%s> refcnt %d\n", 1688 __func__, ni, ether_sprintf(ni->ni_macaddr), 1689 ieee80211_node_refcnt(ni)-1); 1690 ieee80211_free_node(ni); 1691 } 1692 return status; 1693} 1694 1695/* 1696 * Reclaim a node. If this is the last reference count then 1697 * do the normal free work. Otherwise remove it from the node 1698 * table and mark it gone by clearing the back-reference. 1699 */ 1700static void 1701node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1702{ 1703 ieee80211_keyix keyix; 1704 1705 IEEE80211_NODE_LOCK_ASSERT(nt); 1706 1707 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1708 "%s: remove %p<%s> from %s table, refcnt %d\n", 1709 __func__, ni, ether_sprintf(ni->ni_macaddr), 1710 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1711 /* 1712 * Clear any entry in the unicast key mapping table. 1713 * We need to do it here so rx lookups don't find it 1714 * in the mapping table even if it's not in the hash 1715 * table. We cannot depend on the mapping table entry 1716 * being cleared because the node may not be free'd. 1717 */ 1718 keyix = ni->ni_ucastkey.wk_rxkeyix; 1719 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1720 nt->nt_keyixmap[keyix] == ni) { 1721 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1722 "%s: %p<%s> clear key map entry\n", 1723 __func__, ni, ether_sprintf(ni->ni_macaddr)); 1724 nt->nt_keyixmap[keyix] = NULL; 1725 ieee80211_node_decref(ni); /* NB: don't need free */ 1726 } 1727 if (!ieee80211_node_dectestref(ni)) { 1728 /* 1729 * Other references are present, just remove the 1730 * node from the table so it cannot be found. When 1731 * the references are dropped storage will be 1732 * reclaimed. 1733 */ 1734 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1735 LIST_REMOVE(ni, ni_hash); 1736 ni->ni_table = NULL; /* clear reference */ 1737 } else 1738 _ieee80211_free_node(ni); 1739} 1740 1741/* 1742 * Reclaim a (bss) node. Decrement the refcnt and reclaim 1743 * the node if the only other reference to it is in the sta 1744 * table. This is effectively ieee80211_free_node followed 1745 * by node_reclaim when the refcnt is 1 (after the free). 1746 */ 1747static void 1748ieee80211_node_reclaim(struct ieee80211_node *ni) 1749{ 1750 struct ieee80211_node_table *nt = ni->ni_table; 1751 1752 KASSERT(nt != NULL, ("reclaim node not in table")); 1753 1754#ifdef IEEE80211_DEBUG_REFCNT 1755 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1756 "%s %p<%s> refcnt %d\n", __func__, ni, 1757 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1758#endif 1759 IEEE80211_NODE_LOCK(nt); 1760 if (ieee80211_node_dectestref(ni)) { 1761 /* 1762 * Last reference, reclaim state. 1763 */ 1764 _ieee80211_free_node(ni); 1765 nt = NULL; 1766 } else if (ieee80211_node_refcnt(ni) == 1 && 1767 nt->nt_keyixmap != NULL) { 1768 ieee80211_keyix keyix; 1769 /* 1770 * Check for a last reference in the key mapping table. 1771 */ 1772 keyix = ni->ni_ucastkey.wk_rxkeyix; 1773 if (keyix < nt->nt_keyixmax && 1774 nt->nt_keyixmap[keyix] == ni) { 1775 IEEE80211_DPRINTF(ni->ni_vap, 1776 IEEE80211_MSG_NODE, 1777 "%s: %p<%s> clear key map entry", __func__, 1778 ni, ether_sprintf(ni->ni_macaddr)); 1779 nt->nt_keyixmap[keyix] = NULL; 1780 ieee80211_node_decref(ni); /* XXX needed? */ 1781 _ieee80211_free_node(ni); 1782 nt = NULL; 1783 } 1784 } 1785 if (nt != NULL && ieee80211_node_refcnt(ni) == 1) { 1786 /* 1787 * Last reference is in the sta table; complete 1788 * the reclaim. This handles bss nodes being 1789 * recycled: the node has two references, one for 1790 * iv_bss and one for the table. After dropping 1791 * the iv_bss ref above we need to reclaim the sta 1792 * table reference. 1793 */ 1794 ieee80211_node_decref(ni); /* NB: be pendantic */ 1795 _ieee80211_free_node(ni); 1796 } 1797 IEEE80211_NODE_UNLOCK(nt); 1798} 1799 1800/* 1801 * Node table support. 1802 */ 1803 1804static void 1805ieee80211_node_table_init(struct ieee80211com *ic, 1806 struct ieee80211_node_table *nt, 1807 const char *name, int inact, int keyixmax) 1808{ 1809 struct ifnet *ifp = ic->ic_ifp; 1810 1811 nt->nt_ic = ic; 1812 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname); 1813 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname); 1814 TAILQ_INIT(&nt->nt_node); 1815 nt->nt_name = name; 1816 nt->nt_scangen = 1; 1817 nt->nt_inact_init = inact; 1818 nt->nt_keyixmax = keyixmax; 1819 if (nt->nt_keyixmax > 0) { 1820 nt->nt_keyixmap = (struct ieee80211_node **) malloc( 1821 keyixmax * sizeof(struct ieee80211_node *), 1822 M_80211_NODE, M_NOWAIT | M_ZERO); 1823 if (nt->nt_keyixmap == NULL) 1824 if_printf(ic->ic_ifp, 1825 "Cannot allocate key index map with %u entries\n", 1826 keyixmax); 1827 } else 1828 nt->nt_keyixmap = NULL; 1829} 1830 1831static void 1832ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1833 struct ieee80211vap *match) 1834{ 1835 struct ieee80211_node *ni, *next; 1836 1837 IEEE80211_NODE_LOCK(nt); 1838 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1839 if (match != NULL && ni->ni_vap != match) 1840 continue; 1841 /* XXX can this happen? if so need's work */ 1842 if (ni->ni_associd != 0) { 1843 struct ieee80211vap *vap = ni->ni_vap; 1844 1845 if (vap->iv_auth->ia_node_leave != NULL) 1846 vap->iv_auth->ia_node_leave(ni); 1847 if (vap->iv_aid_bitmap != NULL) 1848 IEEE80211_AID_CLR(vap, ni->ni_associd); 1849 } 1850 ni->ni_wdsvap = NULL; /* clear reference */ 1851 node_reclaim(nt, ni); 1852 } 1853 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1854 /* 1855 * Make a separate pass to clear references to this vap 1856 * held by DWDS entries. They will not be matched above 1857 * because ni_vap will point to the ap vap but we still 1858 * need to clear ni_wdsvap when the WDS vap is destroyed 1859 * and/or reset. 1860 */ 1861 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1862 if (ni->ni_wdsvap == match) 1863 ni->ni_wdsvap = NULL; 1864 } 1865 IEEE80211_NODE_UNLOCK(nt); 1866} 1867 1868static void 1869ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1870{ 1871 ieee80211_node_table_reset(nt, NULL); 1872 if (nt->nt_keyixmap != NULL) { 1873#ifdef DIAGNOSTIC 1874 /* XXX verify all entries are NULL */ 1875 int i; 1876 for (i = 0; i < nt->nt_keyixmax; i++) 1877 if (nt->nt_keyixmap[i] != NULL) 1878 printf("%s: %s[%u] still active\n", __func__, 1879 nt->nt_name, i); 1880#endif 1881 free(nt->nt_keyixmap, M_80211_NODE); 1882 nt->nt_keyixmap = NULL; 1883 } 1884 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1885 IEEE80211_NODE_LOCK_DESTROY(nt); 1886} 1887 1888/* 1889 * Timeout inactive stations and do related housekeeping. 1890 * Note that we cannot hold the node lock while sending a 1891 * frame as this would lead to a LOR. Instead we use a 1892 * generation number to mark nodes that we've scanned and 1893 * drop the lock and restart a scan if we have to time out 1894 * a node. Since we are single-threaded by virtue of 1895 * controlling the inactivity timer we can be sure this will 1896 * process each node only once. 1897 */ 1898static void 1899ieee80211_timeout_stations(struct ieee80211com *ic) 1900{ 1901 struct ieee80211_node_table *nt = &ic->ic_sta; 1902 struct ieee80211vap *vap; 1903 struct ieee80211_node *ni; 1904 int gen = 0; 1905 1906 IEEE80211_NODE_ITERATE_LOCK(nt); 1907 gen = ++nt->nt_scangen; 1908restart: 1909 IEEE80211_NODE_LOCK(nt); 1910 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1911 if (ni->ni_scangen == gen) /* previously handled */ 1912 continue; 1913 ni->ni_scangen = gen; 1914 /* 1915 * Ignore entries for which have yet to receive an 1916 * authentication frame. These are transient and 1917 * will be reclaimed when the last reference to them 1918 * goes away (when frame xmits complete). 1919 */ 1920 vap = ni->ni_vap; 1921 /* 1922 * Only process stations when in RUN state. This 1923 * insures, for example, that we don't timeout an 1924 * inactive station during CAC. Note that CSA state 1925 * is actually handled in ieee80211_node_timeout as 1926 * it applies to more than timeout processing. 1927 */ 1928 if (vap->iv_state != IEEE80211_S_RUN) 1929 continue; 1930 /* XXX can vap be NULL? */ 1931 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 1932 vap->iv_opmode == IEEE80211_M_STA) && 1933 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1934 continue; 1935 /* 1936 * Free fragment if not needed anymore 1937 * (last fragment older than 1s). 1938 * XXX doesn't belong here, move to node_age 1939 */ 1940 if (ni->ni_rxfrag[0] != NULL && 1941 ticks > ni->ni_rxfragstamp + hz) { 1942 m_freem(ni->ni_rxfrag[0]); 1943 ni->ni_rxfrag[0] = NULL; 1944 } 1945 if (ni->ni_inact > 0) { 1946 ni->ni_inact--; 1947 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1948 "%s: inact %u inact_reload %u nrates %u", 1949 __func__, ni->ni_inact, ni->ni_inact_reload, 1950 ni->ni_rates.rs_nrates); 1951 } 1952 /* 1953 * Special case ourself; we may be idle for extended periods 1954 * of time and regardless reclaiming our state is wrong. 1955 * XXX run ic_node_age 1956 */ 1957 if (ni == vap->iv_bss) 1958 continue; 1959 if (ni->ni_associd != 0 || 1960 (vap->iv_opmode == IEEE80211_M_IBSS || 1961 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 1962 /* 1963 * Age/drain resources held by the station. 1964 */ 1965 ic->ic_node_age(ni); 1966 /* 1967 * Probe the station before time it out. We 1968 * send a null data frame which may not be 1969 * universally supported by drivers (need it 1970 * for ps-poll support so it should be...). 1971 * 1972 * XXX don't probe the station unless we've 1973 * received a frame from them (and have 1974 * some idea of the rates they are capable 1975 * of); this will get fixed more properly 1976 * soon with better handling of the rate set. 1977 */ 1978 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1979 (0 < ni->ni_inact && 1980 ni->ni_inact <= vap->iv_inact_probe) && 1981 ni->ni_rates.rs_nrates != 0) { 1982 IEEE80211_NOTE(vap, 1983 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1984 ni, "%s", 1985 "probe station due to inactivity"); 1986 /* 1987 * Grab a reference before unlocking the table 1988 * so the node cannot be reclaimed before we 1989 * send the frame. ieee80211_send_nulldata 1990 * understands we've done this and reclaims the 1991 * ref for us as needed. 1992 */ 1993 ieee80211_ref_node(ni); 1994 IEEE80211_NODE_UNLOCK(nt); 1995 ieee80211_send_nulldata(ni); 1996 /* XXX stat? */ 1997 goto restart; 1998 } 1999 } 2000 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2001 ni->ni_inact <= 0) { 2002 IEEE80211_NOTE(vap, 2003 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2004 "station timed out due to inactivity " 2005 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2006 /* 2007 * Send a deauthenticate frame and drop the station. 2008 * This is somewhat complicated due to reference counts 2009 * and locking. At this point a station will typically 2010 * have a reference count of 1. ieee80211_node_leave 2011 * will do a "free" of the node which will drop the 2012 * reference count. But in the meantime a reference 2013 * wil be held by the deauth frame. The actual reclaim 2014 * of the node will happen either after the tx is 2015 * completed or by ieee80211_node_leave. 2016 * 2017 * Separately we must drop the node lock before sending 2018 * in case the driver takes a lock, as this can result 2019 * in a LOR between the node lock and the driver lock. 2020 */ 2021 ieee80211_ref_node(ni); 2022 IEEE80211_NODE_UNLOCK(nt); 2023 if (ni->ni_associd != 0) { 2024 IEEE80211_SEND_MGMT(ni, 2025 IEEE80211_FC0_SUBTYPE_DEAUTH, 2026 IEEE80211_REASON_AUTH_EXPIRE); 2027 } 2028 ieee80211_node_leave(ni); 2029 ieee80211_free_node(ni); 2030 vap->iv_stats.is_node_timeout++; 2031 goto restart; 2032 } 2033 } 2034 IEEE80211_NODE_UNLOCK(nt); 2035 2036 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2037} 2038 2039/* 2040 * Aggressively reclaim resources. This should be used 2041 * only in a critical situation to reclaim mbuf resources. 2042 */ 2043void 2044ieee80211_drain(struct ieee80211com *ic) 2045{ 2046 struct ieee80211_node_table *nt = &ic->ic_sta; 2047 struct ieee80211vap *vap; 2048 struct ieee80211_node *ni; 2049 2050 IEEE80211_NODE_LOCK(nt); 2051 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2052 /* 2053 * Ignore entries for which have yet to receive an 2054 * authentication frame. These are transient and 2055 * will be reclaimed when the last reference to them 2056 * goes away (when frame xmits complete). 2057 */ 2058 vap = ni->ni_vap; 2059 /* 2060 * Only process stations when in RUN state. This 2061 * insures, for example, that we don't timeout an 2062 * inactive station during CAC. Note that CSA state 2063 * is actually handled in ieee80211_node_timeout as 2064 * it applies to more than timeout processing. 2065 */ 2066 if (vap->iv_state != IEEE80211_S_RUN) 2067 continue; 2068 /* XXX can vap be NULL? */ 2069 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2070 vap->iv_opmode == IEEE80211_M_STA) && 2071 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2072 continue; 2073 /* 2074 * Free fragments. 2075 * XXX doesn't belong here, move to node_drain 2076 */ 2077 if (ni->ni_rxfrag[0] != NULL) { 2078 m_freem(ni->ni_rxfrag[0]); 2079 ni->ni_rxfrag[0] = NULL; 2080 } 2081 /* 2082 * Drain resources held by the station. 2083 */ 2084 ic->ic_node_drain(ni); 2085 } 2086 IEEE80211_NODE_UNLOCK(nt); 2087} 2088 2089/* 2090 * Per-ieee80211com inactivity timer callback. 2091 */ 2092void 2093ieee80211_node_timeout(void *arg) 2094{ 2095 struct ieee80211com *ic = arg; 2096 2097 /* 2098 * Defer timeout processing if a channel switch is pending. 2099 * We typically need to be mute so not doing things that 2100 * might generate frames is good to handle in one place. 2101 * Supressing the station timeout processing may extend the 2102 * lifetime of inactive stations (by not decrementing their 2103 * idle counters) but this should be ok unless the CSA is 2104 * active for an unusually long time. 2105 */ 2106 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2107 ieee80211_scan_timeout(ic); 2108 ieee80211_timeout_stations(ic); 2109 2110 IEEE80211_LOCK(ic); 2111 ieee80211_erp_timeout(ic); 2112 ieee80211_ht_timeout(ic); 2113 IEEE80211_UNLOCK(ic); 2114 } 2115 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2116 ieee80211_node_timeout, ic); 2117} 2118 2119void 2120ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2121 ieee80211_iter_func *f, void *arg) 2122{ 2123 struct ieee80211_node *ni; 2124 u_int gen; 2125 2126 IEEE80211_NODE_ITERATE_LOCK(nt); 2127 gen = ++nt->nt_scangen; 2128restart: 2129 IEEE80211_NODE_LOCK(nt); 2130 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2131 if (ni->ni_scangen != gen) { 2132 ni->ni_scangen = gen; 2133 (void) ieee80211_ref_node(ni); 2134 IEEE80211_NODE_UNLOCK(nt); 2135 (*f)(arg, ni); 2136 ieee80211_free_node(ni); 2137 goto restart; 2138 } 2139 } 2140 IEEE80211_NODE_UNLOCK(nt); 2141 2142 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2143} 2144 2145void 2146ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2147{ 2148 printf("0x%p: mac %s refcnt %d\n", ni, 2149 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2150 printf("\tscangen %u authmode %u flags 0x%x\n", 2151 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2152 printf("\tassocid 0x%x txpower %u vlan %u\n", 2153 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2154 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2155 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2156 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2157 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2158 ni->ni_rxfragstamp); 2159 printf("\trstamp %u rssi %d noise %d intval %u capinfo 0x%x\n", 2160 ni->ni_rstamp, node_getrssi(ni), ni->ni_noise, 2161 ni->ni_intval, ni->ni_capinfo); 2162 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2163 ether_sprintf(ni->ni_bssid), 2164 ni->ni_esslen, ni->ni_essid, 2165 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2166 printf("\tinact %u inact_reload %u txrate %u\n", 2167 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2168 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2169 ni->ni_htcap, ni->ni_htparam, 2170 ni->ni_htctlchan, ni->ni_ht2ndchan); 2171 printf("\thtopmode %x htstbc %x chw %u\n", 2172 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2173} 2174 2175void 2176ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2177{ 2178 ieee80211_iterate_nodes(nt, 2179 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2180} 2181 2182static void 2183ieee80211_notify_erp_locked(struct ieee80211com *ic) 2184{ 2185 struct ieee80211vap *vap; 2186 2187 IEEE80211_LOCK_ASSERT(ic); 2188 2189 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2190 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2191 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2192} 2193 2194void 2195ieee80211_notify_erp(struct ieee80211com *ic) 2196{ 2197 IEEE80211_LOCK(ic); 2198 ieee80211_notify_erp_locked(ic); 2199 IEEE80211_UNLOCK(ic); 2200} 2201 2202/* 2203 * Handle a station joining an 11g network. 2204 */ 2205static void 2206ieee80211_node_join_11g(struct ieee80211_node *ni) 2207{ 2208 struct ieee80211com *ic = ni->ni_ic; 2209 2210 IEEE80211_LOCK_ASSERT(ic); 2211 2212 /* 2213 * Station isn't capable of short slot time. Bump 2214 * the count of long slot time stations and disable 2215 * use of short slot time. Note that the actual switch 2216 * over to long slot time use may not occur until the 2217 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2218 */ 2219 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2220 ic->ic_longslotsta++; 2221 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2222 "station needs long slot time, count %d", 2223 ic->ic_longslotsta); 2224 /* XXX vap's w/ conflicting needs won't work */ 2225 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2226 /* 2227 * Don't force slot time when switched to turbo 2228 * mode as non-ERP stations won't be present; this 2229 * need only be done when on the normal G channel. 2230 */ 2231 ieee80211_set_shortslottime(ic, 0); 2232 } 2233 } 2234 /* 2235 * If the new station is not an ERP station 2236 * then bump the counter and enable protection 2237 * if configured. 2238 */ 2239 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2240 ic->ic_nonerpsta++; 2241 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2242 "station is !ERP, %d non-ERP stations associated", 2243 ic->ic_nonerpsta); 2244 /* 2245 * If station does not support short preamble 2246 * then we must enable use of Barker preamble. 2247 */ 2248 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2249 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2250 "%s", "station needs long preamble"); 2251 ic->ic_flags |= IEEE80211_F_USEBARKER; 2252 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2253 } 2254 /* 2255 * If protection is configured and this is the first 2256 * indication we should use protection, enable it. 2257 */ 2258 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2259 ic->ic_nonerpsta == 1 && 2260 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2261 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2262 "%s: enable use of protection\n", __func__); 2263 ic->ic_flags |= IEEE80211_F_USEPROT; 2264 ieee80211_notify_erp_locked(ic); 2265 } 2266 } else 2267 ni->ni_flags |= IEEE80211_NODE_ERP; 2268} 2269 2270void 2271ieee80211_node_join(struct ieee80211_node *ni, int resp) 2272{ 2273 struct ieee80211com *ic = ni->ni_ic; 2274 struct ieee80211vap *vap = ni->ni_vap; 2275 int newassoc; 2276 2277 if (ni->ni_associd == 0) { 2278 uint16_t aid; 2279 2280 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2281 /* 2282 * It would be good to search the bitmap 2283 * more efficiently, but this will do for now. 2284 */ 2285 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2286 if (!IEEE80211_AID_ISSET(vap, aid)) 2287 break; 2288 } 2289 if (aid >= vap->iv_max_aid) { 2290 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2291 ieee80211_node_leave(ni); 2292 return; 2293 } 2294 ni->ni_associd = aid | 0xc000; 2295 ni->ni_jointime = time_uptime; 2296 IEEE80211_LOCK(ic); 2297 IEEE80211_AID_SET(vap, ni->ni_associd); 2298 vap->iv_sta_assoc++; 2299 ic->ic_sta_assoc++; 2300 2301 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2302 ieee80211_ht_node_join(ni); 2303 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2304 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2305 ieee80211_node_join_11g(ni); 2306 IEEE80211_UNLOCK(ic); 2307 2308 newassoc = 1; 2309 } else 2310 newassoc = 0; 2311 2312 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2313 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2314 IEEE80211_NODE_AID(ni), 2315 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2316 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2317 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2318 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2319 ni->ni_flags & IEEE80211_NODE_HT ? 2320 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2321 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2322 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2323 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2324 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2325 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2326 ", fast-frames" : "", 2327 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2328 ", turbo" : "" 2329 ); 2330 2331 node_setuptxparms(ni); 2332 /* give driver a chance to setup state like ni_txrate */ 2333 if (ic->ic_newassoc != NULL) 2334 ic->ic_newassoc(ni, newassoc); 2335 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2336 /* tell the authenticator about new station */ 2337 if (vap->iv_auth->ia_node_join != NULL) 2338 vap->iv_auth->ia_node_join(ni); 2339 ieee80211_notify_node_join(ni, 2340 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2341} 2342 2343static void 2344disable_protection(struct ieee80211com *ic) 2345{ 2346 KASSERT(ic->ic_nonerpsta == 0 && 2347 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2348 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2349 ic->ic_flags_ext)); 2350 2351 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2352 /* XXX verify mode? */ 2353 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2354 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2355 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2356 } 2357 ieee80211_notify_erp_locked(ic); 2358} 2359 2360/* 2361 * Handle a station leaving an 11g network. 2362 */ 2363static void 2364ieee80211_node_leave_11g(struct ieee80211_node *ni) 2365{ 2366 struct ieee80211com *ic = ni->ni_ic; 2367 2368 IEEE80211_LOCK_ASSERT(ic); 2369 2370 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2371 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2372 ic->ic_bsschan->ic_flags)); 2373 2374 /* 2375 * If a long slot station do the slot time bookkeeping. 2376 */ 2377 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2378 KASSERT(ic->ic_longslotsta > 0, 2379 ("bogus long slot station count %d", ic->ic_longslotsta)); 2380 ic->ic_longslotsta--; 2381 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2382 "long slot time station leaves, count now %d", 2383 ic->ic_longslotsta); 2384 if (ic->ic_longslotsta == 0) { 2385 /* 2386 * Re-enable use of short slot time if supported 2387 * and not operating in IBSS mode (per spec). 2388 */ 2389 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2390 ic->ic_opmode != IEEE80211_M_IBSS) { 2391 IEEE80211_DPRINTF(ni->ni_vap, 2392 IEEE80211_MSG_ASSOC, 2393 "%s: re-enable use of short slot time\n", 2394 __func__); 2395 ieee80211_set_shortslottime(ic, 1); 2396 } 2397 } 2398 } 2399 /* 2400 * If a non-ERP station do the protection-related bookkeeping. 2401 */ 2402 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2403 KASSERT(ic->ic_nonerpsta > 0, 2404 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2405 ic->ic_nonerpsta--; 2406 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2407 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2408 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2409 " (non-ERP sta present)" : ""); 2410 if (ic->ic_nonerpsta == 0 && 2411 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2412 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2413 "%s: disable use of protection\n", __func__); 2414 disable_protection(ic); 2415 } 2416 } 2417} 2418 2419/* 2420 * Time out presence of an overlapping bss with non-ERP 2421 * stations. When operating in hostap mode we listen for 2422 * beacons from other stations and if we identify a non-ERP 2423 * station is present we enable protection. To identify 2424 * when all non-ERP stations are gone we time out this 2425 * condition. 2426 */ 2427static void 2428ieee80211_erp_timeout(struct ieee80211com *ic) 2429{ 2430 2431 IEEE80211_LOCK_ASSERT(ic); 2432 2433 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2434 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2435#if 0 2436 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2437 "%s", "age out non-ERP sta present on channel"); 2438#endif 2439 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2440 if (ic->ic_nonerpsta == 0) 2441 disable_protection(ic); 2442 } 2443} 2444 2445/* 2446 * Handle bookkeeping for station deauthentication/disassociation 2447 * when operating as an ap. 2448 */ 2449void 2450ieee80211_node_leave(struct ieee80211_node *ni) 2451{ 2452 struct ieee80211com *ic = ni->ni_ic; 2453 struct ieee80211vap *vap = ni->ni_vap; 2454 struct ieee80211_node_table *nt = ni->ni_table; 2455 2456 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2457 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2458 2459 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2460 ("unexpected operating mode %u", vap->iv_opmode)); 2461 /* 2462 * If node wasn't previously associated all 2463 * we need to do is reclaim the reference. 2464 */ 2465 /* XXX ibss mode bypasses 11g and notification */ 2466 if (ni->ni_associd == 0) 2467 goto done; 2468 /* 2469 * Tell the authenticator the station is leaving. 2470 * Note that we must do this before yanking the 2471 * association id as the authenticator uses the 2472 * associd to locate it's state block. 2473 */ 2474 if (vap->iv_auth->ia_node_leave != NULL) 2475 vap->iv_auth->ia_node_leave(ni); 2476 2477 IEEE80211_LOCK(ic); 2478 IEEE80211_AID_CLR(vap, ni->ni_associd); 2479 ni->ni_associd = 0; 2480 vap->iv_sta_assoc--; 2481 ic->ic_sta_assoc--; 2482 2483 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2484 ieee80211_ht_node_leave(ni); 2485 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2486 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2487 ieee80211_node_leave_11g(ni); 2488 IEEE80211_UNLOCK(ic); 2489 /* 2490 * Cleanup station state. In particular clear various 2491 * state that might otherwise be reused if the node 2492 * is reused before the reference count goes to zero 2493 * (and memory is reclaimed). 2494 */ 2495 ieee80211_sta_leave(ni); 2496done: 2497 /* 2498 * Remove the node from any table it's recorded in and 2499 * drop the caller's reference. Removal from the table 2500 * is important to insure the node is not reprocessed 2501 * for inactivity. 2502 */ 2503 if (nt != NULL) { 2504 IEEE80211_NODE_LOCK(nt); 2505 node_reclaim(nt, ni); 2506 IEEE80211_NODE_UNLOCK(nt); 2507 } else 2508 ieee80211_free_node(ni); 2509} 2510 2511struct rssiinfo { 2512 struct ieee80211vap *vap; 2513 int rssi_samples; 2514 uint32_t rssi_total; 2515}; 2516 2517static void 2518get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2519{ 2520 struct rssiinfo *info = arg; 2521 struct ieee80211vap *vap = ni->ni_vap; 2522 int8_t rssi; 2523 2524 if (info->vap != vap) 2525 return; 2526 /* only associated stations */ 2527 if (ni->ni_associd == 0) 2528 return; 2529 rssi = vap->iv_ic->ic_node_getrssi(ni); 2530 if (rssi != 0) { 2531 info->rssi_samples++; 2532 info->rssi_total += rssi; 2533 } 2534} 2535 2536static void 2537get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2538{ 2539 struct rssiinfo *info = arg; 2540 struct ieee80211vap *vap = ni->ni_vap; 2541 int8_t rssi; 2542 2543 if (info->vap != vap) 2544 return; 2545 /* only neighbors */ 2546 /* XXX check bssid */ 2547 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2548 return; 2549 rssi = vap->iv_ic->ic_node_getrssi(ni); 2550 if (rssi != 0) { 2551 info->rssi_samples++; 2552 info->rssi_total += rssi; 2553 } 2554} 2555 2556int8_t 2557ieee80211_getrssi(struct ieee80211vap *vap) 2558{ 2559#define NZ(x) ((x) == 0 ? 1 : (x)) 2560 struct ieee80211com *ic = vap->iv_ic; 2561 struct rssiinfo info; 2562 2563 info.rssi_total = 0; 2564 info.rssi_samples = 0; 2565 info.vap = vap; 2566 switch (vap->iv_opmode) { 2567 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2568 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2569 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2570 break; 2571 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2572 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2573 break; 2574 case IEEE80211_M_MONITOR: /* XXX */ 2575 case IEEE80211_M_STA: /* use stats from associated ap */ 2576 default: 2577 if (vap->iv_bss != NULL) 2578 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2579 info.rssi_samples = 1; 2580 break; 2581 } 2582 return info.rssi_total / NZ(info.rssi_samples); 2583#undef NZ 2584} 2585 2586void 2587ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2588{ 2589 2590 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2591 return; 2592 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2593 /* for non-station mode return avg'd rssi accounting */ 2594 if (vap->iv_opmode != IEEE80211_M_STA) 2595 *rssi = ieee80211_getrssi(vap); 2596} 2597