1/*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2001 Atsushi Onoe 5 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 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_var.h> 42#include <net/if_media.h> 43#include <net/ethernet.h> 44 45#include <net80211/ieee80211_var.h> 46#include <net80211/ieee80211_input.h> 47#ifdef IEEE80211_SUPPORT_SUPERG 48#include <net80211/ieee80211_superg.h> 49#endif 50#ifdef IEEE80211_SUPPORT_TDMA 51#include <net80211/ieee80211_tdma.h> 52#endif 53#include <net80211/ieee80211_wds.h> 54#include <net80211/ieee80211_mesh.h> 55#include <net80211/ieee80211_ratectl.h> 56#include <net80211/ieee80211_vht.h> 57 58#include <net/bpf.h> 59 60#ifdef IEEE80211_DEBUG_REFCNT 61#define __debrefcnt_used 62#else 63#define __debrefcnt_used __unused 64#endif 65 66/* 67 * IEEE80211_NODE_HASHSIZE must be a power of 2. 68 */ 69CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 70 71/* 72 * Association id's are managed with a bit vector. 73 */ 74#define IEEE80211_AID_SET(_vap, b) \ 75 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 76 (1 << (IEEE80211_AID(b) % 32))) 77#define IEEE80211_AID_CLR(_vap, b) \ 78 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 79 ~(1 << (IEEE80211_AID(b) % 32))) 80#define IEEE80211_AID_ISSET(_vap, b) \ 81 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 82 83static int ieee80211_sta_join1(struct ieee80211_node *); 84 85static struct ieee80211_node *ieee80211_alloc_node( 86 struct ieee80211_node_table *, struct ieee80211vap *, 87 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *, int); 88static struct ieee80211_node *node_alloc(struct ieee80211vap *, 89 const uint8_t [IEEE80211_ADDR_LEN]); 90static int node_init(struct ieee80211_node *); 91static void node_cleanup(struct ieee80211_node *); 92static void node_free(struct ieee80211_node *); 93static void node_age(struct ieee80211_node *); 94static int8_t node_getrssi(const struct ieee80211_node *); 95static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 96static void node_getmimoinfo(const struct ieee80211_node *, 97 struct ieee80211_mimo_info *); 98 99static void __ieee80211_free_node(struct ieee80211_node *); 100 101static void node_reclaim(struct ieee80211_node_table *nt, 102 struct ieee80211_node *ni); 103static void ieee80211_node_table_init(struct ieee80211com *ic, 104 struct ieee80211_node_table *nt, const char *name, 105 int inact, int keymaxix); 106static void ieee80211_node_table_reset(struct ieee80211_node_table *, 107 struct ieee80211vap *); 108static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 109static void ieee80211_vap_erp_timeout(struct ieee80211vap *); 110 111MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 112MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 113 114void 115ieee80211_node_attach(struct ieee80211com *ic) 116{ 117 /* XXX really want maxlen enforced per-sta */ 118 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 119 "802.11 staging q"); 120 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 121 IEEE80211_INACT_INIT, ic->ic_max_keyix); 122 callout_init(&ic->ic_inact, 1); 123 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 124 ieee80211_node_timeout, ic); 125 126 ic->ic_node_alloc = node_alloc; 127 ic->ic_node_init = node_init; 128 ic->ic_node_free = node_free; 129 ic->ic_node_cleanup = node_cleanup; 130 ic->ic_node_age = node_age; 131 ic->ic_node_drain = node_age; /* NB: same as age */ 132 ic->ic_node_getrssi = node_getrssi; 133 ic->ic_node_getsignal = node_getsignal; 134 ic->ic_node_getmimoinfo = node_getmimoinfo; 135 136 /* 137 * Set flags to be propagated to all vap's; 138 * these define default behaviour/configuration. 139 */ 140 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 141} 142 143void 144ieee80211_node_detach(struct ieee80211com *ic) 145{ 146 147 callout_drain(&ic->ic_inact); 148 ieee80211_node_table_cleanup(&ic->ic_sta); 149 ieee80211_ageq_drain(&ic->ic_stageq); 150 ieee80211_ageq_cleanup(&ic->ic_stageq); 151} 152 153void 154ieee80211_node_vattach(struct ieee80211vap *vap) 155{ 156 /* NB: driver can override */ 157 vap->iv_max_aid = IEEE80211_AID_DEF; 158 159 /* default station inactivity timer settings */ 160 vap->iv_inact_init = IEEE80211_INACT_INIT; 161 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 162 vap->iv_inact_run = IEEE80211_INACT_RUN; 163 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 164 165 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 166 "%s: init %u auth %u run %u probe %u\n", __func__, 167 vap->iv_inact_init, vap->iv_inact_auth, 168 vap->iv_inact_run, vap->iv_inact_probe); 169} 170 171void 172ieee80211_node_latevattach(struct ieee80211vap *vap) 173{ 174 175 /* XXX should ieee80211_vap_attach(), our only caller hold the lock? */ 176 IEEE80211_UNLOCK_ASSERT(vap->iv_ic); 177 178 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 179 /* XXX should we allow max aid to be zero? */ 180 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 181 vap->iv_max_aid = IEEE80211_AID_MIN; 182 if_printf(vap->iv_ifp, 183 "WARNING: max aid too small, changed to %d\n", 184 vap->iv_max_aid); 185 } 186 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( 187 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 188 M_80211_NODE, 189 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 190 if (vap->iv_aid_bitmap == NULL) { 191 /* XXX no way to recover */ 192 printf("%s: no memory for AID bitmap, max aid %d!\n", 193 __func__, vap->iv_max_aid); 194 vap->iv_max_aid = 0; 195 } 196 } 197 198 IEEE80211_LOCK(vap->iv_ic); 199 ieee80211_reset_bss(vap); 200 IEEE80211_UNLOCK(vap->iv_ic); 201 202 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 203} 204 205void 206ieee80211_node_vdetach(struct ieee80211vap *vap) 207{ 208 struct ieee80211com *ic = vap->iv_ic; 209 210 /* XXX should ieee80211_vap_detach(), our only caller hold the lock? */ 211 IEEE80211_UNLOCK_ASSERT(vap->iv_ic); 212 213 ieee80211_node_table_reset(&ic->ic_sta, vap); 214 IEEE80211_LOCK(ic); 215 if (vap->iv_bss != NULL) { 216 ieee80211_free_node(vap->iv_bss); 217 vap->iv_update_bss(vap, NULL); 218 } 219 IEEE80211_UNLOCK(ic); 220 if (vap->iv_aid_bitmap != NULL) { 221 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); 222 vap->iv_aid_bitmap = NULL; 223 } 224} 225 226/* 227 * Port authorize/unauthorize interfaces for use by an authenticator. 228 */ 229 230void 231ieee80211_node_authorize(struct ieee80211_node *ni) 232{ 233 struct ieee80211vap *vap = ni->ni_vap; 234 235 ni->ni_flags |= IEEE80211_NODE_AUTH; 236 ni->ni_inact_reload = vap->iv_inact_run; 237 ni->ni_inact = ni->ni_inact_reload; 238 239 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 240 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 241} 242 243void 244ieee80211_node_unauthorize(struct ieee80211_node *ni) 245{ 246 struct ieee80211vap *vap = ni->ni_vap; 247 248 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 249 ni->ni_inact_reload = vap->iv_inact_auth; 250 if (ni->ni_inact > ni->ni_inact_reload) 251 ni->ni_inact = ni->ni_inact_reload; 252 253 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 254 "%s: inact_reload %u inact %u", __func__, 255 ni->ni_inact_reload, ni->ni_inact); 256} 257 258/* 259 * Fix tx parameters for a node according to ``association state''. 260 */ 261void 262ieee80211_node_setuptxparms(struct ieee80211_node *ni) 263{ 264 struct ieee80211vap *vap = ni->ni_vap; 265 enum ieee80211_phymode mode; 266 267 if (ni->ni_flags & IEEE80211_NODE_VHT) { 268 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 269 mode = IEEE80211_MODE_VHT_5GHZ; 270 else 271 mode = IEEE80211_MODE_VHT_2GHZ; 272 } else if (ni->ni_flags & IEEE80211_NODE_HT) { 273 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 274 mode = IEEE80211_MODE_11NA; 275 else 276 mode = IEEE80211_MODE_11NG; 277 } else { /* legacy rate handling */ 278 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 279 mode = IEEE80211_MODE_STURBO_A; 280 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 281 mode = IEEE80211_MODE_HALF; 282 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 283 mode = IEEE80211_MODE_QUARTER; 284 /* NB: 108A should be handled as 11a */ 285 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 286 mode = IEEE80211_MODE_11A; 287 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 288 (ni->ni_flags & IEEE80211_NODE_ERP)) 289 mode = IEEE80211_MODE_11G; 290 else 291 mode = IEEE80211_MODE_11B; 292 } 293 ni->ni_txparms = &vap->iv_txparms[mode]; 294} 295 296/* 297 * Set/change the channel. The rate set is also updated as 298 * to insure a consistent view by drivers. 299 * XXX should be private but hostap needs it to deal with CSA 300 */ 301void 302ieee80211_node_set_chan(struct ieee80211_node *ni, 303 struct ieee80211_channel *chan) 304{ 305 struct ieee80211com *ic = ni->ni_ic; 306 struct ieee80211vap *vap = ni->ni_vap; 307 enum ieee80211_phymode mode; 308 309 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 310 311 ni->ni_chan = chan; 312 mode = ieee80211_chan2mode(chan); 313 if (IEEE80211_IS_CHAN_HT(chan)) { 314 /* 315 * We must install the legacy rate est in ni_rates and the 316 * HT rate set in ni_htrates. 317 */ 318 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 319 /* 320 * Setup bss tx parameters based on operating mode. We 321 * use legacy rates when operating in a mixed HT+non-HT bss 322 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 323 */ 324 if (mode == IEEE80211_MODE_11NA && 325 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 326 mode = IEEE80211_MODE_11A; 327 else if (mode == IEEE80211_MODE_11NG && 328 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 329 mode = IEEE80211_MODE_11G; 330 if (mode == IEEE80211_MODE_11G && 331 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 332 mode = IEEE80211_MODE_11B; 333 } 334 ni->ni_txparms = &vap->iv_txparms[mode]; 335 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 336} 337 338static __inline void 339copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 340{ 341 /* propagate useful state */ 342 nbss->ni_authmode = obss->ni_authmode; 343 nbss->ni_txpower = obss->ni_txpower; 344 nbss->ni_vlan = obss->ni_vlan; 345 /* XXX statistics? */ 346 /* XXX legacy WDS bssid? */ 347} 348 349void 350ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 351{ 352 struct ieee80211com *ic = vap->iv_ic; 353 struct ieee80211_node *ni; 354 355 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 356 "%s: creating %s on channel %u%c flags 0x%08x\n", __func__, 357 ieee80211_opmode_name[vap->iv_opmode], 358 ieee80211_chan2ieee(ic, chan), 359 ieee80211_channel_type_char(chan), 360 chan->ic_flags); 361 362 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr, 363 __func__, __LINE__); 364 if (ni == NULL) { 365 /* XXX recovery? */ 366 return; 367 } 368 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 369 ni->ni_esslen = vap->iv_des_ssid[0].len; 370 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 371 if (vap->iv_bss != NULL) 372 copy_bss(ni, vap->iv_bss); 373 ni->ni_intval = ic->ic_bintval; 374 if (vap->iv_flags & IEEE80211_F_PRIVACY) 375 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 376 if (ic->ic_phytype == IEEE80211_T_FH) { 377 ni->ni_fhdwell = 200; /* XXX */ 378 ni->ni_fhindex = 1; 379 } 380 if (vap->iv_opmode == IEEE80211_M_IBSS) { 381 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 382 if (vap->iv_flags & IEEE80211_F_DESBSSID) 383 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 384 else { 385 net80211_get_random_bytes(ni->ni_bssid, 386 IEEE80211_ADDR_LEN); 387 /* clear group bit, add local bit */ 388 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 389 } 390 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 391 if (vap->iv_flags & IEEE80211_F_DESBSSID) 392 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 393 else 394#ifdef IEEE80211_SUPPORT_TDMA 395 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 396#endif 397 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 398#ifdef IEEE80211_SUPPORT_MESH 399 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 400 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 401 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 402#endif 403 } 404 /* 405 * Fix the channel and related attributes. 406 */ 407 /* clear DFS CAC state on previous channel */ 408 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 409 ic->ic_bsschan->ic_freq != chan->ic_freq && 410 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 411 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 412 ic->ic_bsschan = chan; 413 ieee80211_node_set_chan(ni, chan); 414 ic->ic_curmode = ieee80211_chan2mode(chan); 415 /* 416 * Do mode-specific setup. 417 */ 418 if (IEEE80211_IS_CHAN_FULL(chan)) { 419 if (IEEE80211_IS_CHAN_ANYG(chan)) { 420 /* 421 * Use a mixed 11b/11g basic rate set. 422 */ 423 ieee80211_setbasicrates(&ni->ni_rates, 424 IEEE80211_MODE_11G); 425 if (vap->iv_flags & IEEE80211_F_PUREG) { 426 /* 427 * Also mark OFDM rates basic so 11b 428 * stations do not join (WiFi compliance). 429 */ 430 ieee80211_addbasicrates(&ni->ni_rates, 431 IEEE80211_MODE_11A); 432 } 433 } else if (IEEE80211_IS_CHAN_B(chan)) { 434 /* 435 * Force pure 11b rate set. 436 */ 437 ieee80211_setbasicrates(&ni->ni_rates, 438 IEEE80211_MODE_11B); 439 } 440 } 441 442 /* XXX TODO: other bits and pieces - eg fast-frames? */ 443 444 /* If we're an 11n channel then initialise the 11n bits */ 445 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { 446 /* XXX what else? */ 447 ieee80211_ht_node_init(ni); 448 ieee80211_vht_node_init(ni); 449 } else if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 450 /* XXX what else? */ 451 ieee80211_ht_node_init(ni); 452 } 453 454 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 455} 456 457/* 458 * Reset bss state on transition to the INIT state. 459 * Clear any stations from the table (they have been 460 * deauth'd) and reset the bss node (clears key, rate 461 * etc. state). 462 */ 463void 464ieee80211_reset_bss(struct ieee80211vap *vap) 465{ 466 struct ieee80211com *ic = vap->iv_ic; 467 struct ieee80211_node *ni, *obss; 468 469 IEEE80211_LOCK_ASSERT(ic); 470 471 ieee80211_node_table_reset(&ic->ic_sta, vap); 472 /* XXX multi-bss: wrong */ 473 ieee80211_vap_reset_erp(vap); 474 475 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr, 476 __func__, __LINE__); 477 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 478 obss = vap->iv_update_bss(vap, ieee80211_ref_node(ni)); 479 if (obss != NULL) { 480 copy_bss(ni, obss); 481 ni->ni_intval = ic->ic_bintval; 482 ieee80211_free_node(obss); 483 } else 484 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 485} 486 487static int 488match_ssid(const struct ieee80211_node *ni, 489 int nssid, const struct ieee80211_scan_ssid ssids[]) 490{ 491 int i; 492 493 for (i = 0; i < nssid; i++) { 494 if (ni->ni_esslen == ssids[i].len && 495 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 496 return 1; 497 } 498 return 0; 499} 500 501/* 502 * Test a node for suitability/compatibility. 503 */ 504static int 505check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 506{ 507 struct ieee80211com *ic = ni->ni_ic; 508 uint8_t rate; 509 510 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 511 return 0; 512 if (vap->iv_opmode == IEEE80211_M_IBSS) { 513 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 514 return 0; 515 } else { 516 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 517 return 0; 518 } 519 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 520 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 521 return 0; 522 } else { 523 /* XXX does this mean privacy is supported or required? */ 524 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 525 return 0; 526 } 527 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 528 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 529 if (rate & IEEE80211_RATE_BASIC) 530 return 0; 531 if (vap->iv_des_nssid != 0 && 532 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 533 return 0; 534 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 535 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 536 return 0; 537 return 1; 538} 539 540#ifdef IEEE80211_DEBUG 541/* 542 * Display node suitability/compatibility. 543 */ 544static void 545check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 546{ 547 struct ieee80211com *ic = ni->ni_ic; 548 uint8_t rate; 549 int fail; 550 551 fail = 0; 552 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 553 fail |= 0x01; 554 if (vap->iv_opmode == IEEE80211_M_IBSS) { 555 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 556 fail |= 0x02; 557 } else { 558 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 559 fail |= 0x02; 560 } 561 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 562 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 563 fail |= 0x04; 564 } else { 565 /* XXX does this mean privacy is supported or required? */ 566 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 567 fail |= 0x04; 568 } 569 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 570 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 571 if (rate & IEEE80211_RATE_BASIC) 572 fail |= 0x08; 573 if (vap->iv_des_nssid != 0 && 574 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 575 fail |= 0x10; 576 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 577 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 578 fail |= 0x20; 579 580 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 581 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 582 printf(" %3d%c", 583 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 584 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 585 fail & 0x08 ? '!' : ' '); 586 printf(" %4s%c", 587 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 588 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 589 "????", 590 fail & 0x02 ? '!' : ' '); 591 printf(" %3s%c ", 592 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 593 fail & 0x04 ? '!' : ' '); 594 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 595 printf("%s\n", fail & 0x10 ? "!" : ""); 596} 597#endif /* IEEE80211_DEBUG */ 598 599int 600ieee80211_ibss_merge_check(struct ieee80211_node *ni) 601{ 602 struct ieee80211vap *vap = ni->ni_vap; 603 604 if (ni == vap->iv_bss || 605 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 606 /* unchanged, nothing to do */ 607 return 0; 608 } 609 610 if (!check_bss(vap, ni)) { 611 /* capabilities mismatch */ 612 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 613 "%s: merge failed, capabilities mismatch\n", __func__); 614#ifdef IEEE80211_DEBUG 615 if (ieee80211_msg_assoc(vap)) 616 check_bss_debug(vap, ni); 617#endif 618 vap->iv_stats.is_ibss_capmismatch++; 619 return 0; 620 } 621 622 return 1; 623} 624 625/* 626 * Check if the given node should populate the node table. 627 * 628 * We need to be in "see all beacons for all ssids" mode in order 629 * to do IBSS merges, however this means we will populate nodes for 630 * /all/ IBSS SSIDs, versus just the one we care about. 631 * 632 * So this check ensures the node can actually belong to our IBSS 633 * configuration. For now it simply checks the SSID. 634 */ 635int 636ieee80211_ibss_node_check_new(struct ieee80211_node *ni, 637 const struct ieee80211_scanparams *scan) 638{ 639 struct ieee80211vap *vap = ni->ni_vap; 640 int i; 641 642 /* 643 * If we have no SSID and no scan SSID, return OK. 644 */ 645 if (vap->iv_des_nssid == 0 && scan->ssid == NULL) 646 goto ok; 647 648 /* 649 * If we have one of (SSID, scan SSID) then return error. 650 */ 651 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL)) 652 goto mismatch; 653 654 /* 655 * Double-check - we need scan SSID. 656 */ 657 if (scan->ssid == NULL) 658 goto mismatch; 659 660 /* 661 * Check if the scan SSID matches the SSID list for the VAP. 662 */ 663 for (i = 0; i < vap->iv_des_nssid; i++) { 664 /* Sanity length check */ 665 if (vap->iv_des_ssid[i].len != scan->ssid[1]) 666 continue; 667 668 /* Note: SSID in the scan entry is the IE format */ 669 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2, 670 vap->iv_des_ssid[i].len) == 0) 671 goto ok; 672 } 673 674mismatch: 675 return (0); 676ok: 677 return (1); 678} 679 680/* 681 * Handle 802.11 ad hoc network merge. The 682 * convention, set by the Wireless Ethernet Compatibility Alliance 683 * (WECA), is that an 802.11 station will change its BSSID to match 684 * the "oldest" 802.11 ad hoc network, on the same channel, that 685 * has the station's desired SSID. The "oldest" 802.11 network 686 * sends beacons with the greatest TSF timestamp. 687 * 688 * The caller is assumed to validate TSF's before attempting a merge. 689 * 690 * Return !0 if the BSSID changed, 0 otherwise. 691 */ 692int 693ieee80211_ibss_merge(struct ieee80211_node *ni) 694{ 695#ifdef IEEE80211_DEBUG 696 struct ieee80211vap *vap = ni->ni_vap; 697#endif 698 699 if (! ieee80211_ibss_merge_check(ni)) 700 return 0; 701 702 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 703 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 704 ether_sprintf(ni->ni_bssid), 705 vap->iv_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 706 vap->iv_flags&IEEE80211_F_SHSLOT ? "short" : "long", 707 vap->iv_flags&IEEE80211_F_USEPROT ? ", protection" : "" 708 ); 709 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 710} 711 712/* 713 * Calculate HT channel promotion flags for all vaps. 714 * This assumes ni_chan have been setup for each vap. 715 */ 716static int 717gethtadjustflags(struct ieee80211com *ic) 718{ 719 struct ieee80211vap *vap; 720 int flags; 721 722 flags = 0; 723 /* XXX locking */ 724 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 725 if (vap->iv_state < IEEE80211_S_RUN) 726 continue; 727 switch (vap->iv_opmode) { 728 case IEEE80211_M_WDS: 729 case IEEE80211_M_STA: 730 case IEEE80211_M_AHDEMO: 731 case IEEE80211_M_HOSTAP: 732 case IEEE80211_M_IBSS: 733 case IEEE80211_M_MBSS: 734 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 735 break; 736 default: 737 break; 738 } 739 } 740 return flags; 741} 742 743/* 744 * Calculate VHT channel promotion flags for all vaps. 745 * This assumes ni_chan have been setup for each vap. 746 */ 747static int 748getvhtadjustflags(struct ieee80211com *ic) 749{ 750 struct ieee80211vap *vap; 751 int flags; 752 753 flags = 0; 754 /* XXX locking */ 755 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 756 if (vap->iv_state < IEEE80211_S_RUN) 757 continue; 758 switch (vap->iv_opmode) { 759 case IEEE80211_M_WDS: 760 case IEEE80211_M_STA: 761 case IEEE80211_M_AHDEMO: 762 case IEEE80211_M_HOSTAP: 763 case IEEE80211_M_IBSS: 764 case IEEE80211_M_MBSS: 765 flags |= ieee80211_vhtchanflags(vap->iv_bss->ni_chan); 766 break; 767 default: 768 break; 769 } 770 } 771 return flags; 772} 773 774/* 775 * Check if the current channel needs to change based on whether 776 * any vap's are using HT20/HT40. This is used to sync the state 777 * of ic_curchan after a channel width change on a running vap. 778 * 779 * Same applies for VHT. 780 */ 781void 782ieee80211_sync_curchan(struct ieee80211com *ic) 783{ 784 struct ieee80211_channel *c; 785 786 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 787 c = ieee80211_vht_adjust_channel(ic, c, getvhtadjustflags(ic)); 788 789 if (c != ic->ic_curchan) { 790 ic->ic_curchan = c; 791 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 792 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 793 IEEE80211_UNLOCK(ic); 794 ic->ic_set_channel(ic); 795 ieee80211_radiotap_chan_change(ic); 796 IEEE80211_LOCK(ic); 797 } 798} 799 800/* 801 * Setup the current channel. The request channel may be 802 * promoted if other vap's are operating with HT20/HT40. 803 */ 804void 805ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 806{ 807 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 808 int flags = gethtadjustflags(ic); 809 /* 810 * Check for channel promotion required to support the 811 * set of running vap's. This assumes we are called 812 * after ni_chan is setup for each vap. 813 */ 814 /* XXX VHT? */ 815 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 816 if (flags > ieee80211_htchanflags(c)) 817 c = ieee80211_ht_adjust_channel(ic, c, flags); 818 } 819 820 /* 821 * VHT promotion - this will at least promote to VHT20/40 822 * based on what HT has done; it may further promote the 823 * channel to VHT80 or above. 824 */ 825 if (ic->ic_vht_cap.vht_cap_info != 0) { 826 int flags = getvhtadjustflags(ic); 827 if (flags > ieee80211_vhtchanflags(c)) 828 c = ieee80211_vht_adjust_channel(ic, c, flags); 829 } 830 831 ic->ic_bsschan = ic->ic_curchan = c; 832 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 833 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 834} 835 836/* 837 * Change the current channel. The channel change is guaranteed to have 838 * happened before the next state change. 839 */ 840void 841ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 842{ 843 ieee80211_setupcurchan(ic, c); 844 ieee80211_runtask(ic, &ic->ic_chan_task); 845} 846 847void 848ieee80211_update_chw(struct ieee80211com *ic) 849{ 850 851 ieee80211_setupcurchan(ic, ic->ic_curchan); 852 ieee80211_runtask(ic, &ic->ic_chw_task); 853} 854 855/* 856 * Join the specified IBSS/BSS network. The node is assumed to 857 * be passed in with a held reference. 858 */ 859static int 860ieee80211_sta_join1(struct ieee80211_node *selbs) 861{ 862 struct ieee80211vap *vap = selbs->ni_vap; 863 struct ieee80211com *ic = selbs->ni_ic; 864 struct ieee80211_node *obss; 865 int canreassoc; 866 867 /* 868 * Committed to selbs, setup state. 869 */ 870 IEEE80211_LOCK(ic); /* XXX may recurse here, check callers. */ 871 obss = vap->iv_update_bss(vap, selbs); /* NB: caller assumed to bump refcnt */ 872 IEEE80211_UNLOCK(ic); 873 /* 874 * Check if old+new node have the same address in which 875 * case we can reassociate when operating in sta mode. 876 */ 877 /* XXX We'll not be in RUN anymore as iv_state got updated already? */ 878 canreassoc = (obss != NULL && 879 vap->iv_state == IEEE80211_S_RUN && 880 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 881 if (obss != NULL) { 882 struct ieee80211_node_table *nt = obss->ni_table; 883 884 copy_bss(selbs, obss); 885 if (nt != NULL) { 886 ieee80211_node_decref(obss); /* iv_bss reference */ 887 IEEE80211_NODE_LOCK(nt); 888 node_reclaim(nt, obss); /* station table reference */ 889 IEEE80211_NODE_UNLOCK(nt); 890 } else { 891 ieee80211_free_node(obss); /* iv_bss reference */ 892 } 893 894 obss = NULL; /* NB: guard against later use */ 895 } 896 897 /* 898 * Delete unusable rates; we've already checked 899 * that the negotiated rate set is acceptable. 900 */ 901 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 902 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 903 904 ieee80211_setcurchan(ic, selbs->ni_chan); 905 /* 906 * Set the erp state (mostly the slot time) to deal with 907 * the auto-select case; this should be redundant if the 908 * mode is locked. 909 */ 910 ieee80211_vap_reset_erp(vap); 911 ieee80211_wme_initparams(vap); 912 913 if (vap->iv_opmode == IEEE80211_M_STA) { 914 if (canreassoc) { 915 /* Reassociate */ 916 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 917 } else { 918 /* 919 * Act as if we received a DEAUTH frame in case we 920 * are invoked from the RUN state. This will cause 921 * us to try to re-authenticate if we are operating 922 * as a station. 923 */ 924 IEEE80211_DPRINTF(vap, IEEE80211_MSG_AUTH, 925 "%s %p<%s> %s -> AUTH, FC0_SUBTYPE_DEAUTH\n", 926 __func__, selbs, ether_sprintf(selbs->ni_macaddr), 927 ieee80211_state_name[vap->iv_state]); 928 ieee80211_new_state(vap, IEEE80211_S_AUTH, 929 IEEE80211_FC0_SUBTYPE_DEAUTH); 930 } 931 } else 932 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 933 return 1; 934} 935 936int 937ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 938 const struct ieee80211_scan_entry *se) 939{ 940 struct ieee80211com *ic = vap->iv_ic; 941 struct ieee80211_node *ni; 942 int do_ht = 0; 943 944 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr, 945 __func__, __LINE__); 946 if (ni == NULL) { 947 /* XXX msg */ 948 return 0; 949 } 950 951 /* 952 * Expand scan state into node's format. 953 * XXX may not need all this stuff 954 */ 955 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 956 ni->ni_esslen = se->se_ssid[1]; 957 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 958 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 959 ni->ni_intval = se->se_intval; 960 ni->ni_capinfo = se->se_capinfo; 961 ni->ni_chan = chan; 962 ni->ni_timoff = se->se_timoff; 963 ni->ni_fhdwell = se->se_fhdwell; 964 ni->ni_fhindex = se->se_fhindex; 965 ni->ni_erp = se->se_erp; 966 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 967 ni->ni_noise = se->se_noise; 968 if (vap->iv_opmode == IEEE80211_M_STA) { 969 /* NB: only infrastructure mode requires an associd */ 970 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 971 } 972 973 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 974 ieee80211_ies_expand(&ni->ni_ies); 975#ifdef IEEE80211_SUPPORT_SUPERG 976 if (ni->ni_ies.ath_ie != NULL) 977 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 978#endif 979 if (ni->ni_ies.htcap_ie != NULL) 980 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 981 if (ni->ni_ies.htinfo_ie != NULL) 982 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 983#ifdef IEEE80211_SUPPORT_MESH 984 if (ni->ni_ies.meshid_ie != NULL) 985 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 986#endif 987#ifdef IEEE80211_SUPPORT_TDMA 988 if (ni->ni_ies.tdma_ie != NULL) 989 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 990#endif 991 if (ni->ni_ies.vhtcap_ie != NULL) 992 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 993 if (ni->ni_ies.vhtopmode_ie != NULL) 994 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 995 996 /* XXX parse BSSLOAD IE */ 997 /* XXX parse TXPWRENV IE */ 998 /* XXX parse APCHANREP IE */ 999 } 1000 1001 vap->iv_dtim_period = se->se_dtimperiod; 1002 vap->iv_dtim_count = 0; 1003 1004 /* NB: must be after ni_chan is setup */ 1005 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 1006 IEEE80211_F_DOSORT); 1007 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1008 ni->ni_flags |= IEEE80211_NODE_ERP; 1009 1010 /* 1011 * Setup HT state for this node if it's available, otherwise 1012 * non-STA modes won't pick this state up. 1013 * 1014 * For IBSS and related modes that don't go through an 1015 * association request/response, the only appropriate place 1016 * to setup the HT state is here. 1017 */ 1018 if (ni->ni_ies.htinfo_ie != NULL && 1019 ni->ni_ies.htcap_ie != NULL && 1020 vap->iv_flags_ht & IEEE80211_FHT_HT) { 1021 ieee80211_ht_node_init(ni); 1022 ieee80211_ht_updateparams(ni, 1023 ni->ni_ies.htcap_ie, 1024 ni->ni_ies.htinfo_ie); 1025 do_ht = 1; 1026 } 1027 1028 /* 1029 * Setup VHT state for this node if it's available. 1030 * Same as the above. 1031 * 1032 * For now, don't allow 2GHz VHT operation. 1033 */ 1034 if (ni->ni_ies.vhtopmode_ie != NULL && 1035 ni->ni_ies.vhtcap_ie != NULL && 1036 vap->iv_vht_flags & IEEE80211_FVHT_VHT) { 1037 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1038 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1039 __func__, 1040 ni->ni_macaddr, 1041 ":"); 1042 } else { 1043 ieee80211_vht_node_init(ni); 1044 ieee80211_vht_updateparams(ni, 1045 ni->ni_ies.vhtcap_ie, 1046 ni->ni_ies.vhtopmode_ie); 1047 ieee80211_setup_vht_rates(ni, ni->ni_ies.vhtcap_ie, 1048 ni->ni_ies.vhtopmode_ie); 1049 do_ht = 1; 1050 } 1051 } 1052 1053 /* Finally do the node channel change */ 1054 if (do_ht) { 1055 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1056 ni->ni_ies.htinfo_ie); 1057 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 1058 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1059 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 1060 } 1061 1062 /* XXX else check for ath FF? */ 1063 /* XXX QoS? Difficult given that WME config is specific to a master */ 1064 1065 ieee80211_node_setuptxparms(ni); 1066 ieee80211_ratectl_node_init(ni); 1067 1068 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 1069} 1070 1071/* 1072 * Leave the specified IBSS/BSS network. The node is assumed to 1073 * be passed in with a held reference. 1074 */ 1075void 1076ieee80211_sta_leave(struct ieee80211_node *ni) 1077{ 1078 struct ieee80211com *ic = ni->ni_ic; 1079 1080 ic->ic_node_cleanup(ni); 1081 ieee80211_notify_node_leave(ni); 1082} 1083 1084/* 1085 * Send a deauthenticate frame and drop the station. 1086 */ 1087void 1088ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 1089{ 1090 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 1091 ieee80211_ref_node(ni); 1092 if (ni->ni_associd != 0) 1093 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 1094 ieee80211_node_leave(ni); 1095 ieee80211_free_node(ni); 1096} 1097 1098static struct ieee80211_node * 1099node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1100{ 1101 struct ieee80211_node *ni; 1102 1103 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), 1104 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1105 return ni; 1106} 1107 1108static int 1109node_init(struct ieee80211_node *ni) 1110{ 1111 return 0; 1112} 1113 1114/* 1115 * Initialize an ie blob with the specified data. If previous 1116 * data exists re-use the data block. As a side effect we clear 1117 * all references to specific ie's; the caller is required to 1118 * recalculate them. 1119 */ 1120int 1121ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 1122{ 1123 /* NB: assumes data+len are the last fields */ 1124 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 1125 if (ies->data != NULL && ies->len != len) { 1126 /* data size changed */ 1127 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1128 ies->data = NULL; 1129 } 1130 if (ies->data == NULL) { 1131 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 1132 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1133 if (ies->data == NULL) { 1134 ies->len = 0; 1135 /* NB: pointers have already been zero'd above */ 1136 return 0; 1137 } 1138 } 1139 memcpy(ies->data, data, len); 1140 ies->len = len; 1141 return 1; 1142} 1143 1144/* 1145 * Reclaim storage for an ie blob. 1146 */ 1147void 1148ieee80211_ies_cleanup(struct ieee80211_ies *ies) 1149{ 1150 if (ies->data != NULL) 1151 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1152} 1153 1154/* 1155 * Expand an ie blob data contents and to fillin individual 1156 * ie pointers. The data blob is assumed to be well-formed; 1157 * we don't do any validity checking of ie lengths. 1158 */ 1159void 1160ieee80211_ies_expand(struct ieee80211_ies *ies) 1161{ 1162 uint8_t *ie; 1163 int ielen; 1164 1165 ie = ies->data; 1166 ielen = ies->len; 1167 while (ielen > 1) { 1168 /* Make sure the given IE length fits into the total length. */ 1169 if ((2 + ie[1]) > ielen) { 1170 printf("%s: malformed IEs! ies %p { data %p len %d }: " 1171 "ie %u len 2+%u > total len left %d\n", 1172 __func__, ies, ies->data, ies->len, 1173 ie[0], ie[1], ielen); 1174 return; 1175 } 1176 switch (ie[0]) { 1177 case IEEE80211_ELEMID_VENDOR: 1178 if (iswpaoui(ie)) 1179 ies->wpa_ie = ie; 1180 else if (iswmeoui(ie)) 1181 ies->wme_ie = ie; 1182#ifdef IEEE80211_SUPPORT_SUPERG 1183 else if (isatherosoui(ie)) 1184 ies->ath_ie = ie; 1185#endif 1186#ifdef IEEE80211_SUPPORT_TDMA 1187 else if (istdmaoui(ie)) 1188 ies->tdma_ie = ie; 1189#endif 1190 break; 1191 case IEEE80211_ELEMID_RSN: 1192 ies->rsn_ie = ie; 1193 break; 1194 case IEEE80211_ELEMID_HTCAP: 1195 ies->htcap_ie = ie; 1196 break; 1197 case IEEE80211_ELEMID_HTINFO: 1198 ies->htinfo_ie = ie; 1199 break; 1200#ifdef IEEE80211_SUPPORT_MESH 1201 case IEEE80211_ELEMID_MESHID: 1202 ies->meshid_ie = ie; 1203 break; 1204#endif 1205 case IEEE80211_ELEMID_VHT_CAP: 1206 ies->vhtcap_ie = ie; 1207 break; 1208 case IEEE80211_ELEMID_VHT_OPMODE: 1209 ies->vhtopmode_ie = ie; 1210 break; 1211 case IEEE80211_ELEMID_VHT_PWR_ENV: 1212 ies->vhtpwrenv_ie = ie; 1213 break; 1214 case IEEE80211_ELEMID_BSSLOAD: 1215 ies->bssload_ie = ie; 1216 break; 1217 case IEEE80211_ELEMID_APCHANREP: 1218 ies->apchanrep_ie = ie; 1219 break; 1220 } 1221 ielen -= 2 + ie[1]; 1222 ie += 2 + ie[1]; 1223 } 1224} 1225 1226/* 1227 * Reclaim any resources in a node and reset any critical 1228 * state. Typically nodes are free'd immediately after, 1229 * but in some cases the storage may be reused so we need 1230 * to insure consistent state (should probably fix that). 1231 */ 1232static void 1233node_cleanup(struct ieee80211_node *ni) 1234{ 1235 struct ieee80211vap *vap = ni->ni_vap; 1236 struct ieee80211com *ic = ni->ni_ic; 1237 int i; 1238 1239 /* NB: preserve ni_table */ 1240 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1241 if (vap->iv_opmode != IEEE80211_M_STA) 1242 vap->iv_ps_sta--; 1243 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1244 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1245 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1246 } 1247 /* 1248 * Cleanup any VHT and HT-related state. 1249 */ 1250 if (ni->ni_flags & IEEE80211_NODE_VHT) 1251 ieee80211_vht_node_cleanup(ni); 1252 if (ni->ni_flags & IEEE80211_NODE_HT) 1253 ieee80211_ht_node_cleanup(ni); 1254#ifdef IEEE80211_SUPPORT_SUPERG 1255 /* Always do FF node cleanup; for A-MSDU */ 1256 ieee80211_ff_node_cleanup(ni); 1257#endif 1258#ifdef IEEE80211_SUPPORT_MESH 1259 /* 1260 * Cleanup any mesh-related state. 1261 */ 1262 if (vap->iv_opmode == IEEE80211_M_MBSS) 1263 ieee80211_mesh_node_cleanup(ni); 1264#endif 1265 /* 1266 * Clear any staging queue entries. 1267 */ 1268 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1269 1270 /* 1271 * Clear AREF flag that marks the authorization refcnt bump 1272 * has happened. This is probably not needed as the node 1273 * should always be removed from the table so not found but 1274 * do it just in case. 1275 * Likewise clear the ASSOCID flag as these flags are intended 1276 * to be managed in tandem. 1277 */ 1278 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1279 1280 /* 1281 * Drain power save queue and, if needed, clear TIM. 1282 */ 1283 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1284 vap->iv_set_tim(ni, 0); 1285 1286 ni->ni_associd = 0; 1287 if (ni->ni_challenge != NULL) { 1288 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1289 ni->ni_challenge = NULL; 1290 } 1291 /* 1292 * Preserve SSID, WPA, and WME ie's so the bss node is 1293 * reusable during a re-auth/re-assoc state transition. 1294 * If we remove these data they will not be recreated 1295 * because they come from a probe-response or beacon frame 1296 * which cannot be expected prior to the association-response. 1297 * This should not be an issue when operating in other modes 1298 * as stations leaving always go through a full state transition 1299 * which will rebuild this state. 1300 * 1301 * XXX does this leave us open to inheriting old state? 1302 */ 1303 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1304 if (ni->ni_rxfrag[i] != NULL) { 1305 m_freem(ni->ni_rxfrag[i]); 1306 ni->ni_rxfrag[i] = NULL; 1307 } 1308 /* 1309 * Must be careful here to remove any key map entry w/o a LOR. 1310 */ 1311 ieee80211_node_delucastkey(ni); 1312} 1313 1314static void 1315node_free(struct ieee80211_node *ni) 1316{ 1317 struct ieee80211com *ic = ni->ni_ic; 1318 1319 ieee80211_ratectl_node_deinit(ni); 1320 ic->ic_node_cleanup(ni); 1321 ieee80211_ies_cleanup(&ni->ni_ies); 1322 ieee80211_psq_cleanup(&ni->ni_psq); 1323 IEEE80211_FREE(ni, M_80211_NODE); 1324} 1325 1326static void 1327node_age(struct ieee80211_node *ni) 1328{ 1329 struct ieee80211vap *vap = ni->ni_vap; 1330 1331 /* 1332 * Age frames on the power save queue. 1333 */ 1334 if (ieee80211_node_psq_age(ni) != 0 && 1335 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1336 vap->iv_set_tim(ni, 0); 1337 /* 1338 * Age out HT resources (e.g. frames on the 1339 * A-MPDU reorder queues). 1340 */ 1341 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1342 ieee80211_ht_node_age(ni); 1343} 1344 1345static int8_t 1346node_getrssi(const struct ieee80211_node *ni) 1347{ 1348 uint32_t avgrssi = ni->ni_avgrssi; 1349 int32_t rssi; 1350 1351 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1352 return 0; 1353 rssi = IEEE80211_RSSI_GET(avgrssi); 1354 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1355} 1356 1357static void 1358node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1359{ 1360 *rssi = node_getrssi(ni); 1361 *noise = ni->ni_noise; 1362} 1363 1364static void 1365node_getmimoinfo(const struct ieee80211_node *ni, 1366 struct ieee80211_mimo_info *info) 1367{ 1368 int i; 1369 uint32_t avgrssi; 1370 int32_t rssi; 1371 1372 bzero(info, sizeof(*info)); 1373 1374 for (i = 0; i < MIN(IEEE80211_MAX_CHAINS, ni->ni_mimo_chains); i++) { 1375 /* Note: for now, just pri20 channel info */ 1376 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1377 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1378 info->ch[i].rssi[0] = 0; 1379 } else { 1380 rssi = IEEE80211_RSSI_GET(avgrssi); 1381 info->ch[i].rssi[0] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1382 } 1383 info->ch[i].noise[0] = ni->ni_mimo_noise_ctl[i]; 1384 } 1385 1386 /* XXX ext radios? */ 1387 1388 /* XXX EVM? */ 1389} 1390 1391static void 1392ieee80211_add_node_nt(struct ieee80211_node_table *nt, 1393 struct ieee80211_node *ni) 1394{ 1395 struct ieee80211com *ic = nt->nt_ic; 1396 int hash; 1397 1398 IEEE80211_NODE_LOCK_ASSERT(nt); 1399 1400 hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr); 1401 (void) ic; /* XXX IEEE80211_NODE_HASH */ 1402 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1403 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1404 nt->nt_count++; 1405 ni->ni_table = nt; 1406} 1407 1408static void 1409ieee80211_del_node_nt(struct ieee80211_node_table *nt, 1410 struct ieee80211_node *ni) 1411{ 1412 1413 IEEE80211_NODE_LOCK_ASSERT(nt); 1414 1415 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1416 LIST_REMOVE(ni, ni_hash); 1417 nt->nt_count--; 1418 KASSERT(nt->nt_count >= 0, 1419 ("nt_count is negative (%d)!\n", nt->nt_count)); 1420 ni->ni_table = NULL; 1421} 1422 1423static struct ieee80211_node * 1424ieee80211_alloc_node(struct ieee80211_node_table *nt, 1425 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN], 1426 const char *func __debrefcnt_used, int line __debrefcnt_used) 1427{ 1428 struct ieee80211com *ic = nt->nt_ic; 1429 struct ieee80211_node *ni; 1430 1431 ni = ic->ic_node_alloc(vap, macaddr); 1432 if (ni == NULL) { 1433 vap->iv_stats.is_rx_nodealloc++; 1434 return NULL; 1435 } 1436 1437 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1438 "%s %p<%s> in %s table\n", __func__, ni, 1439 ether_sprintf(macaddr), nt->nt_name); 1440 1441 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1442 ieee80211_node_initref(ni); /* mark referenced */ 1443#ifdef IEEE80211_DEBUG_REFCNT 1444 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1445 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1446 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 1447#endif 1448 ni->ni_chan = IEEE80211_CHAN_ANYC; 1449 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1450 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1451 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1452 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1453 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1454 ni->ni_inact_reload = nt->nt_inact_init; 1455 ni->ni_inact = ni->ni_inact_reload; 1456 ni->ni_ath_defkeyix = 0x7fff; 1457 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1458#ifdef IEEE80211_SUPPORT_MESH 1459 if (vap->iv_opmode == IEEE80211_M_MBSS) 1460 ieee80211_mesh_node_init(vap, ni); 1461#endif 1462 IEEE80211_NODE_LOCK(nt); 1463 ieee80211_add_node_nt(nt, ni); 1464 ni->ni_vap = vap; 1465 ni->ni_ic = ic; 1466 IEEE80211_NODE_UNLOCK(nt); 1467 1468 /* handle failure; free node state */ 1469 if (ic->ic_node_init(ni) != 0) { 1470 vap->iv_stats.is_rx_nodealloc++; 1471 ieee80211_psq_cleanup(&ni->ni_psq); 1472 ieee80211_ratectl_node_deinit(ni); 1473 __ieee80211_free_node(ni); 1474 return NULL; 1475 } 1476 1477 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1478 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1479 1480 return ni; 1481} 1482 1483/* 1484 * Craft a temporary node suitable for sending a management frame 1485 * to the specified station. We craft only as much state as we 1486 * need to do the work since the node will be immediately reclaimed 1487 * once the send completes. 1488 */ 1489struct ieee80211_node * 1490ieee80211_tmp_node(struct ieee80211vap *vap, 1491 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1492{ 1493 struct ieee80211com *ic = vap->iv_ic; 1494 struct ieee80211_node *ni; 1495 1496 ni = ic->ic_node_alloc(vap, macaddr); 1497 if (ni != NULL) { 1498 struct ieee80211_node *bss = vap->iv_bss; 1499 1500 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1501 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1502 1503 ni->ni_table = NULL; /* NB: pedantic */ 1504 ni->ni_ic = ic; /* NB: needed to set channel */ 1505 ni->ni_vap = vap; 1506 1507 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1508 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1509 ieee80211_node_initref(ni); /* mark referenced */ 1510#ifdef IEEE80211_DEBUG_REFCNT 1511 /* Only one caller so we skip func/line passing into the func. */ 1512 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1513 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, "", -1, ni, 1514 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 1515#endif 1516 /* NB: required by ieee80211_fix_rate */ 1517 ieee80211_node_set_chan(ni, bss->ni_chan); 1518 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1519 IEEE80211_KEYIX_NONE); 1520 ni->ni_txpower = bss->ni_txpower; 1521 /* XXX optimize away */ 1522 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1523 1524 ieee80211_ratectl_node_init(ni); 1525 1526 /* handle failure; free node state */ 1527 if (ic->ic_node_init(ni) != 0) { 1528 vap->iv_stats.is_rx_nodealloc++; 1529 ieee80211_psq_cleanup(&ni->ni_psq); 1530 ieee80211_ratectl_node_deinit(ni); 1531 __ieee80211_free_node(ni); 1532 return NULL; 1533 } 1534 1535 } else { 1536 /* XXX msg */ 1537 vap->iv_stats.is_rx_nodealloc++; 1538 } 1539 return ni; 1540} 1541 1542struct ieee80211_node * 1543ieee80211_dup_bss(struct ieee80211vap *vap, 1544 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1545{ 1546 struct ieee80211com *ic = vap->iv_ic; 1547 struct ieee80211_node *ni; 1548 1549 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr, __func__, __LINE__); 1550 if (ni != NULL) { 1551 struct ieee80211_node *bss = vap->iv_bss; 1552 /* 1553 * Inherit from iv_bss. 1554 */ 1555 copy_bss(ni, bss); 1556 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1557 ieee80211_node_set_chan(ni, bss->ni_chan); 1558 } 1559 return ni; 1560} 1561 1562/* 1563 * Create a bss node for a legacy WDS vap. The far end does 1564 * not associate so we just create create a new node and 1565 * simulate an association. The caller is responsible for 1566 * installing the node as the bss node and handling any further 1567 * setup work like authorizing the port. 1568 */ 1569struct ieee80211_node * 1570ieee80211_node_create_wds(struct ieee80211vap *vap, 1571 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1572{ 1573 struct ieee80211com *ic = vap->iv_ic; 1574 struct ieee80211_node *ni; 1575 1576 /* XXX check if node already in sta table? */ 1577 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid, __func__, __LINE__); 1578 if (ni != NULL) { 1579 ni->ni_wdsvap = vap; 1580 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1581 /* 1582 * Inherit any manually configured settings. 1583 */ 1584 copy_bss(ni, vap->iv_bss); 1585 ieee80211_node_set_chan(ni, chan); 1586 /* NB: propagate ssid so available to WPA supplicant */ 1587 ni->ni_esslen = vap->iv_des_ssid[0].len; 1588 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1589 /* NB: no associd for peer */ 1590 /* 1591 * There are no management frames to use to 1592 * discover neighbor capabilities, so blindly 1593 * propagate the local configuration. 1594 */ 1595 if (vap->iv_flags & IEEE80211_F_WME) 1596 ni->ni_flags |= IEEE80211_NODE_QOS; 1597#ifdef IEEE80211_SUPPORT_SUPERG 1598 if (vap->iv_flags & IEEE80211_F_FF) 1599 ni->ni_flags |= IEEE80211_NODE_FF; 1600#endif 1601 /* XXX VHT */ 1602 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1603 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1604 /* 1605 * Device is HT-capable and HT is enabled for 1606 * the vap; setup HT operation. On return 1607 * ni_chan will be adjusted to an HT channel. 1608 */ 1609 ieee80211_ht_wds_init(ni); 1610 if (vap->iv_vht_flags & IEEE80211_FVHT_VHT) { 1611 printf("%s: TODO: vht_wds_init\n", __func__); 1612 } 1613 } else { 1614 struct ieee80211_channel *c = ni->ni_chan; 1615 /* 1616 * Force a legacy channel to be used. 1617 */ 1618 c = ieee80211_find_channel(ic, 1619 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1620 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1621 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1622 ni->ni_chan = c; 1623 } 1624 } 1625 return ni; 1626} 1627 1628struct ieee80211_node * 1629_ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1630 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1631 const char *func __debrefcnt_used, int line __debrefcnt_used) 1632{ 1633 struct ieee80211_node *ni; 1634 int hash; 1635 1636 IEEE80211_NODE_LOCK_ASSERT(nt); 1637 1638 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1639 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1640 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1641 ieee80211_ref_node(ni); /* mark referenced */ 1642#ifdef IEEE80211_DEBUG_REFCNT 1643 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1644 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1645 func, line, 1646 ni, ether_sprintf(ni->ni_macaddr), 1647 ieee80211_node_refcnt(ni)); 1648#endif 1649 return ni; 1650 } 1651 } 1652 return NULL; 1653} 1654 1655struct ieee80211_node * 1656_ieee80211_find_node(struct ieee80211_node_table *nt, 1657 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1658 const char *func __debrefcnt_used, int line __debrefcnt_used) 1659{ 1660 struct ieee80211_node *ni; 1661 1662 IEEE80211_NODE_LOCK(nt); 1663 ni = _ieee80211_find_node_locked(nt, macaddr, func, line); 1664 IEEE80211_NODE_UNLOCK(nt); 1665 return ni; 1666} 1667 1668struct ieee80211_node * 1669_ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1670 const struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN], 1671 const char *func __debrefcnt_used, int line __debrefcnt_used) 1672{ 1673 struct ieee80211_node *ni; 1674 int hash; 1675 1676 IEEE80211_NODE_LOCK_ASSERT(nt); 1677 1678 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1679 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1680 if (ni->ni_vap == vap && 1681 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1682 ieee80211_ref_node(ni); /* mark referenced */ 1683#ifdef IEEE80211_DEBUG_REFCNT 1684 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1685 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1686 func, line, 1687 ni, ether_sprintf(ni->ni_macaddr), 1688 ieee80211_node_refcnt(ni)); 1689#endif 1690 return ni; 1691 } 1692 } 1693 return NULL; 1694} 1695 1696struct ieee80211_node * 1697_ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1698 const struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN], 1699 const char *func __debrefcnt_used, int line __debrefcnt_used) 1700{ 1701 struct ieee80211_node *ni; 1702 1703 IEEE80211_NODE_LOCK(nt); 1704 ni = _ieee80211_find_vap_node_locked(nt, vap, macaddr, func, line); 1705 IEEE80211_NODE_UNLOCK(nt); 1706 return ni; 1707} 1708 1709/* 1710 * Fake up a node; this handles node discovery in adhoc mode. 1711 * Note that for the driver's benefit we treat this like 1712 * an association so the driver has an opportunity to setup 1713 * it's private state. 1714 */ 1715struct ieee80211_node * 1716ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1717 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1718{ 1719 struct ieee80211_node *ni; 1720 1721 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1722 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1723 ni = ieee80211_dup_bss(vap, macaddr); 1724 if (ni != NULL) { 1725 struct ieee80211com *ic = vap->iv_ic; 1726 1727 /* XXX no rate negotiation; just dup */ 1728 ni->ni_rates = vap->iv_bss->ni_rates; 1729 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1730 ni->ni_flags |= IEEE80211_NODE_ERP; 1731 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1732 /* 1733 * In adhoc demo mode there are no management 1734 * frames to use to discover neighbor capabilities, 1735 * so blindly propagate the local configuration 1736 * so we can do interesting things (e.g. use 1737 * WME to disable ACK's). 1738 */ 1739 /* 1740 * XXX TODO: 11n? 1741 */ 1742 if (vap->iv_flags & IEEE80211_F_WME) 1743 ni->ni_flags |= IEEE80211_NODE_QOS; 1744#ifdef IEEE80211_SUPPORT_SUPERG 1745 if (vap->iv_flags & IEEE80211_F_FF) 1746 ni->ni_flags |= IEEE80211_NODE_FF; 1747#endif 1748 } 1749 ieee80211_node_setuptxparms(ni); 1750 ieee80211_ratectl_node_init(ni); 1751 1752 /* 1753 * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX, 1754 * not A-MPDU TX; not 11n rates, etc. We'll cycle 1755 * that after we hear that we can indeed do 11n 1756 * (either by a beacon frame or by a probe response.) 1757 */ 1758 1759 /* 1760 * This is the first time we see the node. 1761 */ 1762 if (ic->ic_newassoc != NULL) 1763 ic->ic_newassoc(ni, 1); 1764 1765 /* 1766 * Kick off a probe request to the given node; 1767 * we will then use the probe response to update 1768 * 11n/etc configuration state. 1769 * 1770 * XXX TODO: this isn't guaranteed, and until we get 1771 * a probe response, we won't be able to actually 1772 * do anything 802.11n related to the node. 1773 * So if this does indeed work, maybe we should hold 1774 * off on sending responses until we get the probe 1775 * response, or just default to some sensible subset 1776 * of 802.11n behaviour (eg always allow aggregation 1777 * negotiation TO us, but not FROM us, etc) so we 1778 * aren't entirely busted. 1779 */ 1780 if (vap->iv_opmode == IEEE80211_M_IBSS) { 1781 ieee80211_send_probereq(ni, /* node */ 1782 vap->iv_myaddr, /* SA */ 1783 ni->ni_macaddr, /* DA */ 1784 vap->iv_bss->ni_bssid, /* BSSID */ 1785 vap->iv_bss->ni_essid, 1786 vap->iv_bss->ni_esslen); /* SSID */ 1787 } 1788 1789 /* XXX not right for 802.1x/WPA */ 1790 ieee80211_node_authorize(ni); 1791 } 1792 return ni; 1793} 1794 1795void 1796ieee80211_init_neighbor(struct ieee80211_node *ni, 1797 const struct ieee80211_frame *wh, 1798 const struct ieee80211_scanparams *sp) 1799{ 1800 int do_ht_setup = 0, do_vht_setup = 0; 1801 1802 ni->ni_esslen = sp->ssid[1]; 1803 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1804 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1805 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1806 ni->ni_intval = sp->bintval; 1807 ni->ni_capinfo = sp->capinfo; 1808 ni->ni_chan = ni->ni_ic->ic_curchan; 1809 ni->ni_fhdwell = sp->fhdwell; 1810 ni->ni_fhindex = sp->fhindex; 1811 ni->ni_erp = sp->erp; 1812 ni->ni_timoff = sp->timoff; 1813#ifdef IEEE80211_SUPPORT_MESH 1814 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1815 ieee80211_mesh_init_neighbor(ni, wh, sp); 1816#endif 1817 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1818 ieee80211_ies_expand(&ni->ni_ies); 1819 if (ni->ni_ies.wme_ie != NULL) 1820 ni->ni_flags |= IEEE80211_NODE_QOS; 1821 else 1822 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1823#ifdef IEEE80211_SUPPORT_SUPERG 1824 if (ni->ni_ies.ath_ie != NULL) 1825 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1826#endif 1827 if (ni->ni_ies.htcap_ie != NULL) 1828 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1829 if (ni->ni_ies.htinfo_ie != NULL) 1830 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1831 1832 if (ni->ni_ies.vhtcap_ie != NULL) 1833 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 1834 if (ni->ni_ies.vhtopmode_ie != NULL) 1835 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 1836 1837 if ((ni->ni_ies.htcap_ie != NULL) && 1838 (ni->ni_ies.htinfo_ie != NULL) && 1839 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1840 do_ht_setup = 1; 1841 } 1842 1843 if ((ni->ni_ies.vhtcap_ie != NULL) && 1844 (ni->ni_ies.vhtopmode_ie != NULL) && 1845 (ni->ni_vap->iv_vht_flags & IEEE80211_FVHT_VHT)) { 1846 do_vht_setup = 1; 1847 } 1848 } 1849 1850 /* NB: must be after ni_chan is setup */ 1851 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1852 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1853 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1854 1855 /* 1856 * If the neighbor is HT compatible, flip that on. 1857 */ 1858 if (do_ht_setup) { 1859 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1860 "%s: doing HT setup\n", __func__); 1861 ieee80211_ht_node_init(ni); 1862 ieee80211_ht_updateparams(ni, 1863 ni->ni_ies.htcap_ie, 1864 ni->ni_ies.htinfo_ie); 1865 1866 if (do_vht_setup) { 1867 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1868 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1869 __func__, 1870 ni->ni_macaddr, 1871 ":"); 1872 } else { 1873 ieee80211_vht_node_init(ni); 1874 ieee80211_vht_updateparams(ni, 1875 ni->ni_ies.vhtcap_ie, 1876 ni->ni_ies.vhtopmode_ie); 1877 ieee80211_setup_vht_rates(ni, 1878 ni->ni_ies.vhtcap_ie, 1879 ni->ni_ies.vhtopmode_ie); 1880 } 1881 } 1882 1883 /* 1884 * Finally do the channel upgrade/change based 1885 * on the HT/VHT configuration. 1886 */ 1887 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1888 ni->ni_ies.htinfo_ie); 1889 ieee80211_setup_htrates(ni, 1890 ni->ni_ies.htcap_ie, 1891 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1892 ieee80211_setup_basic_htrates(ni, 1893 ni->ni_ies.htinfo_ie); 1894 1895 ieee80211_node_setuptxparms(ni); 1896 ieee80211_ratectl_node_init(ni); 1897 1898 /* Reassociate; we're now 11n/11ac */ 1899 /* 1900 * XXX TODO: this is the wrong thing to do - 1901 * we're calling it with isnew=1 so the ath(4) 1902 * driver reinitialises the rate tables. 1903 * This "mostly" works for ath(4), but it won't 1904 * be right for firmware devices which allocate 1905 * node states. 1906 * 1907 * So, do we just create a new node and delete 1908 * the old one? Or? 1909 */ 1910 if (ni->ni_ic->ic_newassoc) 1911 ni->ni_ic->ic_newassoc(ni, 1); 1912 } 1913} 1914 1915/* 1916 * Do node discovery in adhoc mode on receipt of a beacon 1917 * or probe response frame. Note that for the driver's 1918 * benefit we treat this like an association so the 1919 * driver has an opportunity to setup it's private state. 1920 */ 1921struct ieee80211_node * 1922ieee80211_add_neighbor(struct ieee80211vap *vap, 1923 const struct ieee80211_frame *wh, 1924 const struct ieee80211_scanparams *sp) 1925{ 1926 struct ieee80211_node *ni; 1927 1928 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1929 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1930 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1931 if (ni != NULL) { 1932 struct ieee80211com *ic = vap->iv_ic; 1933 1934 ieee80211_init_neighbor(ni, wh, sp); 1935 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1936 ni->ni_flags |= IEEE80211_NODE_ERP; 1937 ieee80211_node_setuptxparms(ni); 1938 ieee80211_ratectl_node_init(ni); 1939 if (ic->ic_newassoc != NULL) 1940 ic->ic_newassoc(ni, 1); 1941 /* XXX not right for 802.1x/WPA */ 1942 ieee80211_node_authorize(ni); 1943 } 1944 return ni; 1945} 1946 1947#define IS_PROBEREQ(wh) \ 1948 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1949 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1950#define IS_BCAST_PROBEREQ(wh) \ 1951 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1952 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1953 1954static __inline struct ieee80211_node * 1955_find_rxnode(struct ieee80211_node_table *nt, 1956 const struct ieee80211_frame_min *wh, 1957 const char *func __debrefcnt_used, int line __debrefcnt_used) 1958{ 1959 if (IS_BCAST_PROBEREQ(wh)) 1960 return NULL; /* spam bcast probe req to all vap's */ 1961 return _ieee80211_find_node_locked(nt, wh->i_addr2, func, line); 1962} 1963 1964/* 1965 * Locate the node for sender, track state, and then pass the 1966 * (referenced) node up to the 802.11 layer for its use. Note 1967 * we can return NULL if the sender is not in the table. 1968 */ 1969struct ieee80211_node * 1970_ieee80211_find_rxnode(struct ieee80211com *ic, 1971 const struct ieee80211_frame_min *wh, 1972 const char *func __debrefcnt_used, int line __debrefcnt_used) 1973{ 1974 struct ieee80211_node_table *nt; 1975 struct ieee80211_node *ni; 1976 1977 nt = &ic->ic_sta; 1978 IEEE80211_NODE_LOCK(nt); 1979 ni = _find_rxnode(nt, wh, func, line); 1980 IEEE80211_NODE_UNLOCK(nt); 1981 1982 return ni; 1983} 1984 1985/* 1986 * Like ieee80211_find_rxnode but use the supplied h/w 1987 * key index as a hint to locate the node in the key 1988 * mapping table. If an entry is present at the key 1989 * index we return it; otherwise do a normal lookup and 1990 * update the mapping table if the station has a unicast 1991 * key assigned to it. 1992 */ 1993struct ieee80211_node * 1994_ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1995 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1996 const char *func __debrefcnt_used, int line __debrefcnt_used) 1997{ 1998 struct ieee80211_node_table *nt; 1999 struct ieee80211_node *ni; 2000 2001 nt = &ic->ic_sta; 2002 IEEE80211_NODE_LOCK(nt); 2003 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 2004 ni = nt->nt_keyixmap[keyix]; 2005 else 2006 ni = NULL; 2007 if (ni == NULL) { 2008 ni = _find_rxnode(nt, wh, func, line); 2009 if (ni != NULL && nt->nt_keyixmap != NULL) { 2010 /* 2011 * If the station has a unicast key cache slot 2012 * assigned update the key->node mapping table. 2013 */ 2014 keyix = ni->ni_ucastkey.wk_rxkeyix; 2015 /* XXX can keyixmap[keyix] != NULL? */ 2016 if (keyix < nt->nt_keyixmax && 2017 nt->nt_keyixmap[keyix] == NULL) { 2018 IEEE80211_DPRINTF(ni->ni_vap, 2019 IEEE80211_MSG_NODE, 2020 "%s: add key map entry %p<%s> refcnt %d\n", 2021 __func__, ni, ether_sprintf(ni->ni_macaddr), 2022 ieee80211_node_refcnt(ni)+1); 2023 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 2024 } 2025 } 2026 } else { 2027 if (IS_BCAST_PROBEREQ(wh)) 2028 ni = NULL; /* spam bcast probe req to all vap's */ 2029 else 2030 ieee80211_ref_node(ni); 2031 } 2032 IEEE80211_NODE_UNLOCK(nt); 2033 2034 return ni; 2035} 2036#undef IS_BCAST_PROBEREQ 2037#undef IS_PROBEREQ 2038 2039/* 2040 * Return a reference to the appropriate node for sending 2041 * a data frame. This handles node discovery in adhoc networks. 2042 */ 2043struct ieee80211_node * 2044_ieee80211_find_txnode(struct ieee80211vap *vap, 2045 const uint8_t macaddr[IEEE80211_ADDR_LEN], 2046 const char *func __debrefcnt_used, int line __debrefcnt_used) 2047{ 2048 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 2049 struct ieee80211_node *ni; 2050 2051 /* 2052 * The destination address should be in the node table 2053 * unless this is a multicast/broadcast frame. We can 2054 * also optimize station mode operation, all frames go 2055 * to the bss node. 2056 */ 2057 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 2058 IEEE80211_NODE_LOCK(nt); 2059 if (vap->iv_opmode == IEEE80211_M_STA || 2060 vap->iv_opmode == IEEE80211_M_WDS || 2061 IEEE80211_IS_MULTICAST(macaddr)) 2062 ni = ieee80211_ref_node(vap->iv_bss); 2063 else 2064 ni = _ieee80211_find_node_locked(nt, macaddr, func, line); 2065 IEEE80211_NODE_UNLOCK(nt); 2066 2067 if (ni == NULL) { 2068 if (vap->iv_opmode == IEEE80211_M_IBSS || 2069 vap->iv_opmode == IEEE80211_M_AHDEMO) { 2070 /* 2071 * In adhoc mode cons up a node for the destination. 2072 * Note that we need an additional reference for the 2073 * caller to be consistent with 2074 * ieee80211_find_node_locked. 2075 */ 2076 /* 2077 * XXX TODO: this doesn't fake up 11n state; we need 2078 * to find another way to get it upgraded. 2079 */ 2080 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 2081 if (ni != NULL) 2082 (void) ieee80211_ref_node(ni); 2083 } else { 2084 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 2085 "no node, discard frame (%s)", __func__); 2086 vap->iv_stats.is_tx_nonode++; 2087 } 2088 } 2089 return ni; 2090} 2091 2092struct ieee80211_node * 2093_ieee80211_ref_node(struct ieee80211_node *ni, 2094 const char *func __debrefcnt_used, int line __debrefcnt_used) 2095{ 2096 2097#ifdef IEEE80211_DEBUG_REFCNT 2098 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2099 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 2100 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2101#endif 2102 ieee80211_node_incref(ni); 2103 return (ni); 2104} 2105 2106static void 2107__ieee80211_free_node(struct ieee80211_node *ni) 2108{ 2109 struct ieee80211_node_table *nt = ni->ni_table; 2110 2111 /* 2112 * NB: careful about referencing the vap as it may be 2113 * gone if the last reference was held by a driver. 2114 * We know the com will always be present so it's safe 2115 * to use ni_ic below to reclaim resources. 2116 */ 2117#if 0 2118 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2119 "%s %p<%s> in %s table\n", __func__, ni, 2120 ether_sprintf(ni->ni_macaddr), 2121 nt != NULL ? nt->nt_name : "<gone>"); 2122#endif 2123 if (ni->ni_associd != 0) { 2124 struct ieee80211vap *vap = ni->ni_vap; 2125 if (vap->iv_aid_bitmap != NULL) 2126 IEEE80211_AID_CLR(vap, ni->ni_associd); 2127 } 2128 if (nt != NULL) 2129 ieee80211_del_node_nt(nt, ni); 2130 ni->ni_ic->ic_node_free(ni); 2131} 2132 2133/* 2134 * Clear any entry in the unicast key mapping table. 2135 */ 2136static int 2137node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2138{ 2139 ieee80211_keyix keyix; 2140 2141 keyix = ni->ni_ucastkey.wk_rxkeyix; 2142 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 2143 nt->nt_keyixmap[keyix] == ni) { 2144 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2145 "%s: %p<%s> clear key map entry %u\n", 2146 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 2147 nt->nt_keyixmap[keyix] = NULL; 2148 ieee80211_node_decref(ni); 2149 return 1; 2150 } 2151 2152 return 0; 2153} 2154 2155void 2156_ieee80211_free_node(struct ieee80211_node *ni, 2157 const char *func __debrefcnt_used, int line __debrefcnt_used) 2158{ 2159 struct ieee80211_node_table *nt = ni->ni_table; 2160 2161#ifdef IEEE80211_DEBUG_REFCNT 2162 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2163 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 2164 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 2165#endif 2166 if (nt != NULL) { 2167 IEEE80211_NODE_LOCK(nt); 2168 if (ieee80211_node_dectestref(ni)) { 2169 /* 2170 * Last reference, reclaim state. 2171 */ 2172 __ieee80211_free_node(ni); 2173 } else if (ieee80211_node_refcnt(ni) == 1) 2174 if (node_clear_keyixmap(nt, ni)) 2175 __ieee80211_free_node(ni); 2176 IEEE80211_NODE_UNLOCK(nt); 2177 } else { 2178 if (ieee80211_node_dectestref(ni)) 2179 __ieee80211_free_node(ni); 2180 } 2181} 2182 2183/* 2184 * Reclaim a unicast key and clear any key cache state. 2185 */ 2186int 2187ieee80211_node_delucastkey(struct ieee80211_node *ni) 2188{ 2189 struct ieee80211com *ic = ni->ni_ic; 2190 struct ieee80211_node_table *nt = &ic->ic_sta; 2191 struct ieee80211_node *nikey; 2192 ieee80211_keyix keyix; 2193 int isowned, status; 2194 2195 /* 2196 * NB: We must beware of LOR here; deleting the key 2197 * can cause the crypto layer to block traffic updates 2198 * which can generate a LOR against the node table lock; 2199 * grab it here and stash the key index for our use below. 2200 * 2201 * Must also beware of recursion on the node table lock. 2202 * When called from node_cleanup we may already have 2203 * the node table lock held. Unfortunately there's no 2204 * way to separate out this path so we must do this 2205 * conditionally. 2206 */ 2207 isowned = IEEE80211_NODE_IS_LOCKED(nt); 2208 if (!isowned) 2209 IEEE80211_NODE_LOCK(nt); 2210 nikey = NULL; 2211 status = 1; /* NB: success */ 2212 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 2213 keyix = ni->ni_ucastkey.wk_rxkeyix; 2214 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 2215 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 2216 nikey = nt->nt_keyixmap[keyix]; 2217 nt->nt_keyixmap[keyix] = NULL; 2218 } 2219 } 2220 if (!isowned) 2221 IEEE80211_NODE_UNLOCK(nt); 2222 2223 if (nikey != NULL) { 2224 KASSERT(nikey == ni, 2225 ("key map out of sync, ni %p nikey %p", ni, nikey)); 2226 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2227 "%s: delete key map entry %p<%s> refcnt %d\n", 2228 __func__, ni, ether_sprintf(ni->ni_macaddr), 2229 ieee80211_node_refcnt(ni)-1); 2230 ieee80211_free_node(ni); 2231 } 2232 return status; 2233} 2234 2235/* 2236 * Reclaim a node. If this is the last reference count then 2237 * do the normal free work. Otherwise remove it from the node 2238 * table and mark it gone by clearing the back-reference. 2239 */ 2240static void 2241node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2242{ 2243 2244 IEEE80211_NODE_LOCK_ASSERT(nt); 2245 2246 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2247 "%s: remove %p<%s> from %s table, refcnt %d\n", 2248 __func__, ni, ether_sprintf(ni->ni_macaddr), 2249 nt->nt_name, ieee80211_node_refcnt(ni)-1); 2250 /* 2251 * Clear any entry in the unicast key mapping table. 2252 * We need to do it here so rx lookups don't find it 2253 * in the mapping table even if it's not in the hash 2254 * table. We cannot depend on the mapping table entry 2255 * being cleared because the node may not be free'd. 2256 */ 2257 (void)node_clear_keyixmap(nt, ni); 2258 if (!ieee80211_node_dectestref(ni)) { 2259 /* 2260 * Other references are present, just remove the 2261 * node from the table so it cannot be found. When 2262 * the references are dropped storage will be 2263 * reclaimed. 2264 */ 2265 ieee80211_del_node_nt(nt, ni); 2266 } else 2267 __ieee80211_free_node(ni); 2268} 2269 2270/* 2271 * Node table support. 2272 */ 2273 2274static void 2275ieee80211_node_table_init(struct ieee80211com *ic, 2276 struct ieee80211_node_table *nt, 2277 const char *name, int inact, int keyixmax) 2278{ 2279 2280 nt->nt_ic = ic; 2281 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 2282 TAILQ_INIT(&nt->nt_node); 2283 nt->nt_count = 0; 2284 nt->nt_name = name; 2285 nt->nt_inact_init = inact; 2286 nt->nt_keyixmax = keyixmax; 2287 if (nt->nt_keyixmax > 0) { 2288 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 2289 keyixmax * sizeof(struct ieee80211_node *), 2290 M_80211_NODE, 2291 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2292 if (nt->nt_keyixmap == NULL) 2293 ic_printf(ic, 2294 "Cannot allocate key index map with %u entries\n", 2295 keyixmax); 2296 } else 2297 nt->nt_keyixmap = NULL; 2298} 2299 2300static void 2301ieee80211_node_table_reset(struct ieee80211_node_table *nt, 2302 struct ieee80211vap *match) 2303{ 2304 struct ieee80211_node *ni, *next; 2305 2306 IEEE80211_NODE_LOCK(nt); 2307 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 2308 if (match != NULL && ni->ni_vap != match) 2309 continue; 2310 /* XXX can this happen? if so need's work */ 2311 if (ni->ni_associd != 0) { 2312 struct ieee80211vap *vap = ni->ni_vap; 2313 2314 if (vap->iv_auth->ia_node_leave != NULL) 2315 vap->iv_auth->ia_node_leave(ni); 2316 if (vap->iv_aid_bitmap != NULL) 2317 IEEE80211_AID_CLR(vap, ni->ni_associd); 2318 } 2319 ni->ni_wdsvap = NULL; /* clear reference */ 2320 node_reclaim(nt, ni); 2321 } 2322 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 2323 /* 2324 * Make a separate pass to clear references to this vap 2325 * held by DWDS entries. They will not be matched above 2326 * because ni_vap will point to the ap vap but we still 2327 * need to clear ni_wdsvap when the WDS vap is destroyed 2328 * and/or reset. 2329 */ 2330 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 2331 if (ni->ni_wdsvap == match) 2332 ni->ni_wdsvap = NULL; 2333 } 2334 IEEE80211_NODE_UNLOCK(nt); 2335} 2336 2337static void 2338ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2339{ 2340 ieee80211_node_table_reset(nt, NULL); 2341 if (nt->nt_keyixmap != NULL) { 2342#ifdef DIAGNOSTIC 2343 /* XXX verify all entries are NULL */ 2344 int i; 2345 for (i = 0; i < nt->nt_keyixmax; i++) 2346 if (nt->nt_keyixmap[i] != NULL) 2347 printf("%s: %s[%u] still active\n", __func__, 2348 nt->nt_name, i); 2349#endif 2350 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 2351 nt->nt_keyixmap = NULL; 2352 } 2353 IEEE80211_NODE_LOCK_DESTROY(nt); 2354} 2355 2356static void 2357timeout_stations(void *arg __unused, struct ieee80211_node *ni) 2358{ 2359 struct ieee80211com *ic = ni->ni_ic; 2360 struct ieee80211vap *vap = ni->ni_vap; 2361 2362 /* 2363 * Only process stations when in RUN state. This 2364 * insures, for example, that we don't timeout an 2365 * inactive station during CAC. Note that CSA state 2366 * is actually handled in ieee80211_node_timeout as 2367 * it applies to more than timeout processing. 2368 */ 2369 if (vap->iv_state != IEEE80211_S_RUN) 2370 return; 2371 /* 2372 * Ignore entries for which have yet to receive an 2373 * authentication frame. These are transient and 2374 * will be reclaimed when the last reference to them 2375 * goes away (when frame xmits complete). 2376 */ 2377 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2378 vap->iv_opmode == IEEE80211_M_STA) && 2379 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2380 return; 2381 /* 2382 * Free fragment if not needed anymore 2383 * (last fragment older than 1s). 2384 * XXX doesn't belong here, move to node_age 2385 */ 2386 if (ni->ni_rxfrag[0] != NULL && 2387 ticks > ni->ni_rxfragstamp + hz) { 2388 m_freem(ni->ni_rxfrag[0]); 2389 ni->ni_rxfrag[0] = NULL; 2390 } 2391 if (ni->ni_inact > 0) { 2392 ni->ni_inact--; 2393 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2394 "%s: inact %u inact_reload %u nrates %u", 2395 __func__, ni->ni_inact, ni->ni_inact_reload, 2396 ni->ni_rates.rs_nrates); 2397 } 2398 /* 2399 * Special case ourself; we may be idle for extended periods 2400 * of time and regardless reclaiming our state is wrong. 2401 * XXX run ic_node_age 2402 */ 2403 /* XXX before inact decrement? */ 2404 if (ni == vap->iv_bss) 2405 return; 2406 if (ni->ni_associd != 0 || 2407 (vap->iv_opmode == IEEE80211_M_IBSS || 2408 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2409 /* 2410 * Age/drain resources held by the station. 2411 */ 2412 ic->ic_node_age(ni); 2413 /* 2414 * Probe the station before time it out. We 2415 * send a null data frame which may not be 2416 * universally supported by drivers (need it 2417 * for ps-poll support so it should be...). 2418 * 2419 * XXX don't probe the station unless we've 2420 * received a frame from them (and have 2421 * some idea of the rates they are capable 2422 * of); this will get fixed more properly 2423 * soon with better handling of the rate set. 2424 */ 2425 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2426 (0 < ni->ni_inact && 2427 ni->ni_inact <= vap->iv_inact_probe) && 2428 ni->ni_rates.rs_nrates != 0) { 2429 IEEE80211_NOTE(vap, 2430 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2431 ni, "%s", 2432 "probe station due to inactivity"); 2433 /* 2434 * Grab a reference so the node cannot 2435 * be reclaimed before we send the frame. 2436 * ieee80211_send_nulldata understands 2437 * we've done this and reclaims the 2438 * ref for us as needed. 2439 */ 2440 /* XXX fix this (not required anymore). */ 2441 ieee80211_ref_node(ni); 2442 /* XXX useless */ 2443 ieee80211_send_nulldata(ni); 2444 /* XXX stat? */ 2445 return; 2446 } 2447 } 2448 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2449 ni->ni_inact <= 0) { 2450 IEEE80211_NOTE(vap, 2451 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2452 "station timed out due to inactivity " 2453 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2454 /* 2455 * Send a deauthenticate frame and drop the station. 2456 * This is somewhat complicated due to reference counts 2457 * and locking. At this point a station will typically 2458 * have a reference count of 2. ieee80211_node_leave 2459 * will do a "free" of the node which will drop the 2460 * reference count. But in the meantime a reference 2461 * wil be held by the deauth frame. The actual reclaim 2462 * of the node will happen either after the tx is 2463 * completed or by ieee80211_node_leave. 2464 */ 2465 if (ni->ni_associd != 0) { 2466 IEEE80211_SEND_MGMT(ni, 2467 IEEE80211_FC0_SUBTYPE_DEAUTH, 2468 IEEE80211_REASON_AUTH_EXPIRE); 2469 } 2470 ieee80211_node_leave(ni); 2471 vap->iv_stats.is_node_timeout++; 2472 } 2473} 2474 2475/* 2476 * Timeout inactive stations and do related housekeeping. 2477 */ 2478static void 2479ieee80211_timeout_stations(struct ieee80211com *ic) 2480{ 2481 struct ieee80211_node_table *nt = &ic->ic_sta; 2482 2483 ieee80211_iterate_nodes(nt, timeout_stations, NULL); 2484} 2485 2486/* 2487 * Aggressively reclaim resources. This should be used 2488 * only in a critical situation to reclaim mbuf resources. 2489 */ 2490void 2491ieee80211_drain(struct ieee80211com *ic) 2492{ 2493 struct ieee80211_node_table *nt = &ic->ic_sta; 2494 struct ieee80211vap *vap; 2495 struct ieee80211_node *ni; 2496 2497 IEEE80211_NODE_LOCK(nt); 2498 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2499 /* 2500 * Ignore entries for which have yet to receive an 2501 * authentication frame. These are transient and 2502 * will be reclaimed when the last reference to them 2503 * goes away (when frame xmits complete). 2504 */ 2505 vap = ni->ni_vap; 2506 /* 2507 * Only process stations when in RUN state. This 2508 * insures, for example, that we don't timeout an 2509 * inactive station during CAC. Note that CSA state 2510 * is actually handled in ieee80211_node_timeout as 2511 * it applies to more than timeout processing. 2512 */ 2513 if (vap->iv_state != IEEE80211_S_RUN) 2514 continue; 2515 /* XXX can vap be NULL? */ 2516 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2517 vap->iv_opmode == IEEE80211_M_STA) && 2518 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2519 continue; 2520 /* 2521 * Free fragments. 2522 * XXX doesn't belong here, move to node_drain 2523 */ 2524 if (ni->ni_rxfrag[0] != NULL) { 2525 m_freem(ni->ni_rxfrag[0]); 2526 ni->ni_rxfrag[0] = NULL; 2527 } 2528 /* 2529 * Drain resources held by the station. 2530 */ 2531 ic->ic_node_drain(ni); 2532 } 2533 IEEE80211_NODE_UNLOCK(nt); 2534} 2535 2536/* 2537 * Per-ieee80211vap inactivity timer callback. 2538 */ 2539static void 2540ieee80211_vap_timeout(struct ieee80211vap *vap) 2541{ 2542 2543 IEEE80211_LOCK_ASSERT(vap->iv_ic); 2544 2545 ieee80211_vap_erp_timeout(vap); 2546 ieee80211_ht_timeout(vap); 2547 ieee80211_vht_timeout(vap); 2548} 2549 2550/* 2551 * Per-ieee80211com inactivity timer callback. 2552 */ 2553void 2554ieee80211_node_timeout(void *arg) 2555{ 2556 struct ieee80211com *ic = arg; 2557 struct ieee80211vap *vap; 2558 2559 /* 2560 * Defer timeout processing if a channel switch is pending. 2561 * We typically need to be mute so not doing things that 2562 * might generate frames is good to handle in one place. 2563 * Suppressing the station timeout processing may extend the 2564 * lifetime of inactive stations (by not decrementing their 2565 * idle counters) but this should be ok unless the CSA is 2566 * active for an unusually long time. 2567 */ 2568 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2569 ieee80211_scan_timeout(ic); 2570 ieee80211_timeout_stations(ic); 2571 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2572 2573 IEEE80211_LOCK(ic); 2574 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2575 ieee80211_vap_timeout(vap); 2576 IEEE80211_UNLOCK(ic); 2577 } 2578 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2579 ieee80211_node_timeout, ic); 2580} 2581 2582/* 2583 * The same as ieee80211_iterate_nodes(), but for one vap only. 2584 */ 2585int 2586ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt, 2587 struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg) 2588{ 2589 struct ieee80211_node **ni_arr; 2590 struct ieee80211_node *ni; 2591 size_t size; 2592 int count, i; 2593 2594 /* 2595 * Iterate over the node table and save an array of ref'ed nodes. 2596 * 2597 * This is separated out from calling the actual node function so that 2598 * no LORs will occur. 2599 */ 2600 IEEE80211_NODE_LOCK(nt); 2601 count = nt->nt_count; 2602 size = count * sizeof(struct ieee80211_node *); 2603 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2604 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2605 if (ni_arr == NULL) { 2606 IEEE80211_NODE_UNLOCK(nt); 2607 return (ENOMEM); 2608 } 2609 2610 i = 0; 2611 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2612 if (vap != NULL && ni->ni_vap != vap) 2613 continue; 2614 KASSERT(i < count, 2615 ("node array overflow (vap %p, i %d, count %d)\n", 2616 vap, i, count)); 2617 ni_arr[i] = ieee80211_ref_node(ni); 2618 i++; 2619 } 2620 IEEE80211_NODE_UNLOCK(nt); 2621 2622 for (i = 0; i < count; i++) { 2623 if (ni_arr[i] == NULL) /* end of the list */ 2624 break; 2625 (*f)(arg, ni_arr[i]); 2626 /* ieee80211_free_node() locks by itself */ 2627 ieee80211_free_node(ni_arr[i]); 2628 } 2629 2630 IEEE80211_FREE(ni_arr, M_80211_NODE); 2631 2632 return (0); 2633} 2634 2635/* 2636 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2637 * reference in the source. 2638 */ 2639void 2640ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2641 ieee80211_iter_func *f, void *arg) 2642{ 2643 /* XXX no way to pass error to the caller. */ 2644 (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg); 2645} 2646 2647void 2648ieee80211_dump_node(struct ieee80211_node_table *nt __unused, 2649 struct ieee80211_node *ni) 2650{ 2651 printf("%p: mac %s refcnt %d\n", ni, 2652 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2653 printf("\tauthmode %u flags 0x%x\n", 2654 ni->ni_authmode, ni->ni_flags); 2655 printf("\tassocid 0x%x txpower %u vlan %u\n", 2656 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2657 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2658 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2659 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2660 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2661 ni->ni_rxfragstamp); 2662 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2663 node_getrssi(ni), ni->ni_noise, 2664 ni->ni_intval, ni->ni_capinfo); 2665 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2666 ether_sprintf(ni->ni_bssid), 2667 ni->ni_esslen, ni->ni_essid, 2668 (ni->ni_chan != IEEE80211_CHAN_ANYC) ? ni->ni_chan->ic_freq : 0, 2669 (ni->ni_chan != IEEE80211_CHAN_ANYC) ? ni->ni_chan->ic_flags : 0); 2670 printf("\tinact %u inact_reload %u txrate %u\n", 2671 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2672 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2673 ni->ni_htcap, ni->ni_htparam, 2674 ni->ni_htctlchan, ni->ni_ht2ndchan); 2675 printf("\thtopmode %x htstbc %x htchw %u\n", 2676 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2677 printf("\tvhtcap %x freq1 %d freq2 %d vhtbasicmcs %x\n", 2678 ni->ni_vhtcap, (int) ni->ni_vht_chan1, (int) ni->ni_vht_chan2, 2679 (int) ni->ni_vht_basicmcs); 2680 /* XXX VHT state */ 2681} 2682 2683void 2684ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2685{ 2686 ieee80211_iterate_nodes(nt, 2687 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2688} 2689 2690/* 2691 * Iterate over the VAPs and update their ERP beacon IEs. 2692 * 2693 * Note this must be called from the deferred ERP update task paths. 2694 */ 2695void 2696ieee80211_notify_erp_locked(struct ieee80211com *ic) 2697{ 2698 struct ieee80211vap *vap; 2699 2700 IEEE80211_LOCK_ASSERT(ic); 2701 2702 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2703 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2704 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2705} 2706 2707/* 2708 * Handle a station joining an 11g network. 2709 */ 2710static void 2711ieee80211_node_join_11g(struct ieee80211_node *ni) 2712{ 2713 struct ieee80211com *ic = ni->ni_ic; 2714 struct ieee80211vap *vap = ni->ni_vap; 2715 2716 IEEE80211_LOCK_ASSERT(ic); 2717 2718 /* 2719 * Station isn't capable of short slot time. Bump 2720 * the count of long slot time stations and disable 2721 * use of short slot time. Note that the actual switch 2722 * over to long slot time use may not occur until the 2723 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2724 */ 2725 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2726 vap->iv_longslotsta++; 2727 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2728 "station needs long slot time, count %d", 2729 vap->iv_longslotsta); 2730 /* 2731 * XXX TODO: this may need all VAPs checked! 2732 */ 2733 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2734 /* 2735 * Don't force slot time when switched to turbo 2736 * mode as non-ERP stations won't be present; this 2737 * need only be done when on the normal G channel. 2738 */ 2739 ieee80211_vap_set_shortslottime(vap, 0); 2740 } 2741 } 2742 /* 2743 * If the new station is not an ERP station 2744 * then bump the counter and enable protection 2745 * if configured. 2746 */ 2747 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2748 vap->iv_nonerpsta++; 2749 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2750 "station is !ERP, %d non-ERP stations associated", 2751 vap->iv_nonerpsta); 2752 /* 2753 * If station does not support short preamble 2754 * then we must enable use of Barker preamble. 2755 */ 2756 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2757 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2758 "%s", "station needs long preamble"); 2759 vap->iv_flags |= IEEE80211_F_USEBARKER; 2760 vap->iv_flags &= ~IEEE80211_F_SHPREAMBLE; 2761 ieee80211_vap_update_preamble(vap); 2762 } 2763 /* 2764 * If protection is configured and this is the first 2765 * indication we should use protection, enable it. 2766 */ 2767 if (vap->iv_protmode != IEEE80211_PROT_NONE && 2768 vap->iv_nonerpsta == 1 && 2769 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2770 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2771 "%s: enable use of protection\n", __func__); 2772 vap->iv_flags |= IEEE80211_F_USEPROT; 2773 ieee80211_vap_update_erp_protmode(vap); 2774 } 2775 } else 2776 ni->ni_flags |= IEEE80211_NODE_ERP; 2777} 2778 2779void 2780ieee80211_node_join(struct ieee80211_node *ni, int resp) 2781{ 2782 struct ieee80211com *ic = ni->ni_ic; 2783 struct ieee80211vap *vap = ni->ni_vap; 2784 int newassoc; 2785 2786 if (ni->ni_associd == 0) { 2787 uint16_t aid; 2788 2789 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2790 /* 2791 * It would be good to search the bitmap 2792 * more efficiently, but this will do for now. 2793 */ 2794 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2795 if (!IEEE80211_AID_ISSET(vap, aid)) 2796 break; 2797 } 2798 if (aid >= vap->iv_max_aid) { 2799 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2800 ieee80211_node_leave(ni); 2801 return; 2802 } 2803 ni->ni_associd = aid | 0xc000; 2804 ni->ni_jointime = time_uptime; 2805 IEEE80211_LOCK(ic); 2806 IEEE80211_AID_SET(vap, ni->ni_associd); 2807 vap->iv_sta_assoc++; 2808 2809 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2810 ieee80211_ht_node_join(ni); 2811 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2812 ieee80211_vht_node_join(ni); 2813 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2814 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2815 ieee80211_node_join_11g(ni); 2816 IEEE80211_UNLOCK(ic); 2817 2818 newassoc = 1; 2819 } else 2820 newassoc = 0; 2821 2822 /* 2823 * XXX VHT - should log VHT channel width, etc 2824 */ 2825 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2826 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s%s", 2827 IEEE80211_NODE_AID(ni), 2828 vap->iv_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2829 vap->iv_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2830 vap->iv_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2831 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2832 /* XXX update for VHT string */ 2833 ni->ni_flags & IEEE80211_NODE_HT ? 2834 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2835 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2836 ni->ni_flags & IEEE80211_NODE_AMSDU ? " (+AMSDU)" : "", 2837 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2838 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2839 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2840 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2841 ", fast-frames" : "", 2842 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2843 ", turbo" : "" 2844 ); 2845 2846 ieee80211_node_setuptxparms(ni); 2847 ieee80211_ratectl_node_init(ni); 2848 /* give driver a chance to setup state like ni_txrate */ 2849 if (ic->ic_newassoc != NULL) 2850 ic->ic_newassoc(ni, newassoc); 2851 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2852 /* tell the authenticator about new station */ 2853 if (vap->iv_auth->ia_node_join != NULL) 2854 vap->iv_auth->ia_node_join(ni); 2855 ieee80211_notify_node_join(ni, 2856 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2857} 2858 2859static void 2860disable_protection(struct ieee80211vap *vap) 2861{ 2862 struct ieee80211com *ic = vap->iv_ic; 2863 2864 KASSERT(vap->iv_nonerpsta == 0 && 2865 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2866 ("%d non ERP stations, flags 0x%x", vap->iv_nonerpsta, 2867 vap->iv_flags_ext)); 2868 2869 vap->iv_flags &= ~IEEE80211_F_USEPROT; 2870 /* XXX verify mode? */ 2871 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2872 vap->iv_flags |= IEEE80211_F_SHPREAMBLE; 2873 vap->iv_flags &= ~IEEE80211_F_USEBARKER; 2874 } 2875 ieee80211_vap_update_erp_protmode(vap); 2876 ieee80211_vap_update_preamble(vap); 2877} 2878 2879/* 2880 * Handle a station leaving an 11g network. 2881 */ 2882static void 2883ieee80211_node_leave_11g(struct ieee80211_node *ni) 2884{ 2885 struct ieee80211com *ic = ni->ni_ic; 2886 struct ieee80211vap *vap = ni->ni_vap; 2887 2888 IEEE80211_LOCK_ASSERT(ic); 2889 2890 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2891 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2892 ic->ic_bsschan->ic_flags)); 2893 2894 /* 2895 * If a long slot station do the slot time bookkeeping. 2896 */ 2897 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2898 KASSERT(vap->iv_longslotsta > 0, 2899 ("bogus long slot station count %d", vap->iv_longslotsta)); 2900 vap->iv_longslotsta--; 2901 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2902 "long slot time station leaves, count now %d", 2903 vap->iv_longslotsta); 2904 /* 2905 * XXX TODO: this may need all VAPs checked! 2906 */ 2907 if (vap->iv_longslotsta == 0) { 2908 /* 2909 * Re-enable use of short slot time if supported 2910 * and not operating in IBSS mode (per spec). 2911 */ 2912 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2913 ic->ic_opmode != IEEE80211_M_IBSS) { 2914 IEEE80211_DPRINTF(ni->ni_vap, 2915 IEEE80211_MSG_ASSOC, 2916 "%s: re-enable use of short slot time\n", 2917 __func__); 2918 ieee80211_vap_set_shortslottime(vap, 1); 2919 } 2920 } 2921 } 2922 /* 2923 * If a non-ERP station do the protection-related bookkeeping. 2924 */ 2925 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2926 KASSERT(vap->iv_nonerpsta > 0, 2927 ("bogus non-ERP station count %d", vap->iv_nonerpsta)); 2928 vap->iv_nonerpsta--; 2929 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2930 "non-ERP station leaves, count now %d%s", vap->iv_nonerpsta, 2931 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2932 " (non-ERP sta present)" : ""); 2933 if (vap->iv_nonerpsta == 0 && 2934 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2935 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2936 "%s: disable use of protection\n", __func__); 2937 disable_protection(vap); 2938 } 2939 } 2940} 2941 2942/* 2943 * Time out presence of an overlapping bss with non-ERP 2944 * stations. When operating in hostap mode we listen for 2945 * beacons from other stations and if we identify a non-ERP 2946 * station is present we enable protection. To identify 2947 * when all non-ERP stations are gone we time out this 2948 * condition. 2949 */ 2950static void 2951ieee80211_vap_erp_timeout(struct ieee80211vap *vap) 2952{ 2953 2954 IEEE80211_LOCK_ASSERT(vap->iv_ic); 2955 2956 if ((vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2957 ieee80211_time_after(ticks, vap->iv_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2958 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 2959 "%s", "age out non-ERP sta present on channel"); 2960 vap->iv_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2961 if (vap->iv_nonerpsta == 0) 2962 disable_protection(vap); 2963 } 2964} 2965 2966/* 2967 * Handle bookkeeping for station deauthentication/disassociation 2968 * when operating as an ap. 2969 */ 2970void 2971ieee80211_node_leave(struct ieee80211_node *ni) 2972{ 2973 struct ieee80211com *ic = ni->ni_ic; 2974 struct ieee80211vap *vap = ni->ni_vap; 2975 struct ieee80211_node_table *nt = ni->ni_table; 2976 2977 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2978 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2979 2980 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2981 ("unexpected operating mode %u", vap->iv_opmode)); 2982 /* 2983 * If node wasn't previously associated all 2984 * we need to do is reclaim the reference. 2985 */ 2986 /* XXX ibss mode bypasses 11g and notification */ 2987 if (ni->ni_associd == 0) 2988 goto done; 2989 /* 2990 * Tell the authenticator the station is leaving. 2991 * Note that we must do this before yanking the 2992 * association id as the authenticator uses the 2993 * associd to locate it's state block. 2994 */ 2995 if (vap->iv_auth->ia_node_leave != NULL) 2996 vap->iv_auth->ia_node_leave(ni); 2997 2998 IEEE80211_LOCK(ic); 2999 IEEE80211_AID_CLR(vap, ni->ni_associd); 3000 vap->iv_sta_assoc--; 3001 3002 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 3003 ieee80211_vht_node_leave(ni); 3004 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 3005 ieee80211_ht_node_leave(ni); 3006 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 3007 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 3008 ieee80211_node_leave_11g(ni); 3009 IEEE80211_UNLOCK(ic); 3010 /* 3011 * Cleanup station state. In particular clear various 3012 * state that might otherwise be reused if the node 3013 * is reused before the reference count goes to zero 3014 * (and memory is reclaimed). 3015 */ 3016 ieee80211_sta_leave(ni); 3017done: 3018 /* 3019 * Remove the node from any table it's recorded in and 3020 * drop the caller's reference. Removal from the table 3021 * is important to insure the node is not reprocessed 3022 * for inactivity. 3023 */ 3024 if (nt != NULL) { 3025 IEEE80211_NODE_LOCK(nt); 3026 node_reclaim(nt, ni); 3027 IEEE80211_NODE_UNLOCK(nt); 3028 } else 3029 ieee80211_free_node(ni); 3030} 3031 3032struct rssiinfo { 3033 int rssi_samples; 3034 uint32_t rssi_total; 3035}; 3036 3037static void 3038get_hostap_rssi(void *arg, struct ieee80211_node *ni) 3039{ 3040 struct rssiinfo *info = arg; 3041 struct ieee80211vap *vap = ni->ni_vap; 3042 int8_t rssi; 3043 3044 /* only associated stations */ 3045 if (ni->ni_associd == 0) 3046 return; 3047 rssi = vap->iv_ic->ic_node_getrssi(ni); 3048 if (rssi != 0) { 3049 info->rssi_samples++; 3050 info->rssi_total += rssi; 3051 } 3052} 3053 3054static void 3055get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 3056{ 3057 struct rssiinfo *info = arg; 3058 struct ieee80211vap *vap = ni->ni_vap; 3059 int8_t rssi; 3060 3061 /* only neighbors */ 3062 /* XXX check bssid */ 3063 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 3064 return; 3065 rssi = vap->iv_ic->ic_node_getrssi(ni); 3066 if (rssi != 0) { 3067 info->rssi_samples++; 3068 info->rssi_total += rssi; 3069 } 3070} 3071 3072#ifdef IEEE80211_SUPPORT_MESH 3073static void 3074get_mesh_rssi(void *arg, struct ieee80211_node *ni) 3075{ 3076 struct rssiinfo *info = arg; 3077 struct ieee80211vap *vap = ni->ni_vap; 3078 int8_t rssi; 3079 3080 /* only neighbors that peered successfully */ 3081 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 3082 return; 3083 rssi = vap->iv_ic->ic_node_getrssi(ni); 3084 if (rssi != 0) { 3085 info->rssi_samples++; 3086 info->rssi_total += rssi; 3087 } 3088} 3089#endif /* IEEE80211_SUPPORT_MESH */ 3090 3091int8_t 3092ieee80211_getrssi(struct ieee80211vap *vap) 3093{ 3094#define NZ(x) ((x) == 0 ? 1 : (x)) 3095 struct ieee80211com *ic = vap->iv_ic; 3096 struct rssiinfo info; 3097 3098 info.rssi_total = 0; 3099 info.rssi_samples = 0; 3100 switch (vap->iv_opmode) { 3101 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 3102 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 3103 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi, 3104 &info); 3105 break; 3106 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 3107 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi, 3108 &info); 3109 break; 3110#ifdef IEEE80211_SUPPORT_MESH 3111 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 3112 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi, 3113 &info); 3114 break; 3115#endif 3116 case IEEE80211_M_MONITOR: /* XXX */ 3117 case IEEE80211_M_STA: /* use stats from associated ap */ 3118 default: 3119 if (vap->iv_bss != NULL) 3120 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 3121 info.rssi_samples = 1; 3122 break; 3123 } 3124 return info.rssi_total / NZ(info.rssi_samples); 3125#undef NZ 3126} 3127 3128void 3129ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 3130{ 3131 3132 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 3133 return; 3134 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 3135 /* for non-station mode return avg'd rssi accounting */ 3136 if (vap->iv_opmode != IEEE80211_M_STA) 3137 *rssi = ieee80211_getrssi(vap); 3138} 3139