1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 __FBSDID("$FreeBSD$"); 31 32 #include "opt_wlan.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/mbuf.h> 37 #include <sys/malloc.h> 38 #include <sys/kernel.h> 39 40 #include <sys/socket.h> 41 42 #include <net/if.h> 43 #include <net/if_var.h> 44 #include <net/if_media.h> 45 #include <net/ethernet.h> 46 47 #include <net80211/ieee80211_var.h> 48 #include <net80211/ieee80211_input.h> 49 #ifdef IEEE80211_SUPPORT_SUPERG 50 #include <net80211/ieee80211_superg.h> 51 #endif 52 #ifdef IEEE80211_SUPPORT_TDMA 53 #include <net80211/ieee80211_tdma.h> 54 #endif 55 #include <net80211/ieee80211_wds.h> 56 #include <net80211/ieee80211_mesh.h> 57 #include <net80211/ieee80211_ratectl.h> 58 #include <net80211/ieee80211_vht.h> 59 60 #include <net/bpf.h> 61 62 #ifdef IEEE80211_DEBUG_REFCNT 63 #define __debrefcnt_used 64 #else 65 #define __debrefcnt_used __unused 66 #endif 67 68 /* 69 * IEEE80211_NODE_HASHSIZE must be a power of 2. 70 */ 71 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 72 73 /* 74 * Association id's are managed with a bit vector. 75 */ 76 #define IEEE80211_AID_SET(_vap, b) \ 77 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 78 (1 << (IEEE80211_AID(b) % 32))) 79 #define IEEE80211_AID_CLR(_vap, b) \ 80 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 81 ~(1 << (IEEE80211_AID(b) % 32))) 82 #define IEEE80211_AID_ISSET(_vap, b) \ 83 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 84 85 static int ieee80211_sta_join1(struct ieee80211_node *); 86 87 static struct ieee80211_node *node_alloc(struct ieee80211vap *, 88 const uint8_t [IEEE80211_ADDR_LEN]); 89 static int node_init(struct ieee80211_node *); 90 static void node_cleanup(struct ieee80211_node *); 91 static void node_free(struct ieee80211_node *); 92 static void node_age(struct ieee80211_node *); 93 static int8_t node_getrssi(const struct ieee80211_node *); 94 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 95 static void node_getmimoinfo(const struct ieee80211_node *, 96 struct ieee80211_mimo_info *); 97 98 static void __ieee80211_free_node(struct ieee80211_node *); 99 100 static void node_reclaim(struct ieee80211_node_table *nt, 101 struct ieee80211_node *ni); 102 static void ieee80211_node_table_init(struct ieee80211com *ic, 103 struct ieee80211_node_table *nt, const char *name, 104 int inact, int keymaxix); 105 static void ieee80211_node_table_reset(struct ieee80211_node_table *, 106 struct ieee80211vap *); 107 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 108 static void ieee80211_vap_erp_timeout(struct ieee80211vap *); 109 110 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 111 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 112 113 void 114 ieee80211_node_attach(struct ieee80211com *ic) 115 { 116 /* XXX really want maxlen enforced per-sta */ 117 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 118 "802.11 staging q"); 119 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 120 IEEE80211_INACT_INIT, ic->ic_max_keyix); 121 callout_init(&ic->ic_inact, 1); 122 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 123 ieee80211_node_timeout, ic); 124 125 ic->ic_node_alloc = node_alloc; 126 ic->ic_node_init = node_init; 127 ic->ic_node_free = node_free; 128 ic->ic_node_cleanup = node_cleanup; 129 ic->ic_node_age = node_age; 130 ic->ic_node_drain = node_age; /* NB: same as age */ 131 ic->ic_node_getrssi = node_getrssi; 132 ic->ic_node_getsignal = node_getsignal; 133 ic->ic_node_getmimoinfo = node_getmimoinfo; 134 135 /* 136 * Set flags to be propagated to all vap's; 137 * these define default behaviour/configuration. 138 */ 139 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 140 } 141 142 void 143 ieee80211_node_detach(struct ieee80211com *ic) 144 { 145 146 callout_drain(&ic->ic_inact); 147 ieee80211_node_table_cleanup(&ic->ic_sta); 148 ieee80211_ageq_drain(&ic->ic_stageq); 149 ieee80211_ageq_cleanup(&ic->ic_stageq); 150 } 151 152 void 153 ieee80211_node_vattach(struct ieee80211vap *vap) 154 { 155 /* NB: driver can override */ 156 vap->iv_max_aid = IEEE80211_AID_DEF; 157 158 /* default station inactivity timer settings */ 159 vap->iv_inact_init = IEEE80211_INACT_INIT; 160 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 161 vap->iv_inact_run = IEEE80211_INACT_RUN; 162 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 163 164 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 165 "%s: init %u auth %u run %u probe %u\n", __func__, 166 vap->iv_inact_init, vap->iv_inact_auth, 167 vap->iv_inact_run, vap->iv_inact_probe); 168 } 169 170 void 171 ieee80211_node_latevattach(struct ieee80211vap *vap) 172 { 173 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 174 /* XXX should we allow max aid to be zero? */ 175 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 176 vap->iv_max_aid = IEEE80211_AID_MIN; 177 if_printf(vap->iv_ifp, 178 "WARNING: max aid too small, changed to %d\n", 179 vap->iv_max_aid); 180 } 181 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( 182 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 183 M_80211_NODE, 184 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 185 if (vap->iv_aid_bitmap == NULL) { 186 /* XXX no way to recover */ 187 printf("%s: no memory for AID bitmap, max aid %d!\n", 188 __func__, vap->iv_max_aid); 189 vap->iv_max_aid = 0; 190 } 191 } 192 193 ieee80211_reset_bss(vap); 194 195 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 196 } 197 198 void 199 ieee80211_node_vdetach(struct ieee80211vap *vap) 200 { 201 struct ieee80211com *ic = vap->iv_ic; 202 203 ieee80211_node_table_reset(&ic->ic_sta, vap); 204 if (vap->iv_bss != NULL) { 205 ieee80211_free_node(vap->iv_bss); 206 vap->iv_update_bss(vap, NULL); 207 } 208 if (vap->iv_aid_bitmap != NULL) { 209 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); 210 vap->iv_aid_bitmap = NULL; 211 } 212 } 213 214 /* 215 * Port authorize/unauthorize interfaces for use by an authenticator. 216 */ 217 218 void 219 ieee80211_node_authorize(struct ieee80211_node *ni) 220 { 221 struct ieee80211vap *vap = ni->ni_vap; 222 223 ni->ni_flags |= IEEE80211_NODE_AUTH; 224 ni->ni_inact_reload = vap->iv_inact_run; 225 ni->ni_inact = ni->ni_inact_reload; 226 227 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 228 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 229 } 230 231 void 232 ieee80211_node_unauthorize(struct ieee80211_node *ni) 233 { 234 struct ieee80211vap *vap = ni->ni_vap; 235 236 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 237 ni->ni_inact_reload = vap->iv_inact_auth; 238 if (ni->ni_inact > ni->ni_inact_reload) 239 ni->ni_inact = ni->ni_inact_reload; 240 241 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 242 "%s: inact_reload %u inact %u", __func__, 243 ni->ni_inact_reload, ni->ni_inact); 244 } 245 246 /* 247 * Fix tx parameters for a node according to ``association state''. 248 */ 249 void 250 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 251 { 252 struct ieee80211vap *vap = ni->ni_vap; 253 enum ieee80211_phymode mode; 254 255 if (ni->ni_flags & IEEE80211_NODE_VHT) { 256 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 257 mode = IEEE80211_MODE_VHT_5GHZ; 258 else 259 mode = IEEE80211_MODE_VHT_2GHZ; 260 } else if (ni->ni_flags & IEEE80211_NODE_HT) { 261 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 262 mode = IEEE80211_MODE_11NA; 263 else 264 mode = IEEE80211_MODE_11NG; 265 } else { /* legacy rate handling */ 266 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 267 mode = IEEE80211_MODE_STURBO_A; 268 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 269 mode = IEEE80211_MODE_HALF; 270 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 271 mode = IEEE80211_MODE_QUARTER; 272 /* NB: 108A should be handled as 11a */ 273 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 274 mode = IEEE80211_MODE_11A; 275 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 276 (ni->ni_flags & IEEE80211_NODE_ERP)) 277 mode = IEEE80211_MODE_11G; 278 else 279 mode = IEEE80211_MODE_11B; 280 } 281 ni->ni_txparms = &vap->iv_txparms[mode]; 282 } 283 284 /* 285 * Set/change the channel. The rate set is also updated as 286 * to insure a consistent view by drivers. 287 * XXX should be private but hostap needs it to deal with CSA 288 */ 289 void 290 ieee80211_node_set_chan(struct ieee80211_node *ni, 291 struct ieee80211_channel *chan) 292 { 293 struct ieee80211com *ic = ni->ni_ic; 294 struct ieee80211vap *vap = ni->ni_vap; 295 enum ieee80211_phymode mode; 296 297 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 298 299 ni->ni_chan = chan; 300 mode = ieee80211_chan2mode(chan); 301 if (IEEE80211_IS_CHAN_HT(chan)) { 302 /* 303 * We must install the legacy rate est in ni_rates and the 304 * HT rate set in ni_htrates. 305 */ 306 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 307 /* 308 * Setup bss tx parameters based on operating mode. We 309 * use legacy rates when operating in a mixed HT+non-HT bss 310 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 311 */ 312 if (mode == IEEE80211_MODE_11NA && 313 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 314 mode = IEEE80211_MODE_11A; 315 else if (mode == IEEE80211_MODE_11NG && 316 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 317 mode = IEEE80211_MODE_11G; 318 if (mode == IEEE80211_MODE_11G && 319 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 320 mode = IEEE80211_MODE_11B; 321 } 322 ni->ni_txparms = &vap->iv_txparms[mode]; 323 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 324 } 325 326 static __inline void 327 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 328 { 329 /* propagate useful state */ 330 nbss->ni_authmode = obss->ni_authmode; 331 nbss->ni_txpower = obss->ni_txpower; 332 nbss->ni_vlan = obss->ni_vlan; 333 /* XXX statistics? */ 334 /* XXX legacy WDS bssid? */ 335 } 336 337 void 338 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 339 { 340 struct ieee80211com *ic = vap->iv_ic; 341 struct ieee80211_node *ni; 342 343 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 344 "%s: creating %s on channel %u%c flags 0x%08x\n", __func__, 345 ieee80211_opmode_name[vap->iv_opmode], 346 ieee80211_chan2ieee(ic, chan), 347 ieee80211_channel_type_char(chan), 348 chan->ic_flags); 349 350 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 351 if (ni == NULL) { 352 /* XXX recovery? */ 353 return; 354 } 355 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 356 ni->ni_esslen = vap->iv_des_ssid[0].len; 357 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 358 if (vap->iv_bss != NULL) 359 copy_bss(ni, vap->iv_bss); 360 ni->ni_intval = ic->ic_bintval; 361 if (vap->iv_flags & IEEE80211_F_PRIVACY) 362 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 363 if (ic->ic_phytype == IEEE80211_T_FH) { 364 ni->ni_fhdwell = 200; /* XXX */ 365 ni->ni_fhindex = 1; 366 } 367 if (vap->iv_opmode == IEEE80211_M_IBSS) { 368 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 369 if (vap->iv_flags & IEEE80211_F_DESBSSID) 370 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 371 else { 372 net80211_get_random_bytes(ni->ni_bssid, 373 IEEE80211_ADDR_LEN); 374 /* clear group bit, add local bit */ 375 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 376 } 377 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 378 if (vap->iv_flags & IEEE80211_F_DESBSSID) 379 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 380 else 381 #ifdef IEEE80211_SUPPORT_TDMA 382 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 383 #endif 384 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 385 #ifdef IEEE80211_SUPPORT_MESH 386 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 387 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 388 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 389 #endif 390 } 391 /* 392 * Fix the channel and related attributes. 393 */ 394 /* clear DFS CAC state on previous channel */ 395 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 396 ic->ic_bsschan->ic_freq != chan->ic_freq && 397 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 398 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 399 ic->ic_bsschan = chan; 400 ieee80211_node_set_chan(ni, chan); 401 ic->ic_curmode = ieee80211_chan2mode(chan); 402 /* 403 * Do mode-specific setup. 404 */ 405 if (IEEE80211_IS_CHAN_FULL(chan)) { 406 if (IEEE80211_IS_CHAN_ANYG(chan)) { 407 /* 408 * Use a mixed 11b/11g basic rate set. 409 */ 410 ieee80211_setbasicrates(&ni->ni_rates, 411 IEEE80211_MODE_11G); 412 if (vap->iv_flags & IEEE80211_F_PUREG) { 413 /* 414 * Also mark OFDM rates basic so 11b 415 * stations do not join (WiFi compliance). 416 */ 417 ieee80211_addbasicrates(&ni->ni_rates, 418 IEEE80211_MODE_11A); 419 } 420 } else if (IEEE80211_IS_CHAN_B(chan)) { 421 /* 422 * Force pure 11b rate set. 423 */ 424 ieee80211_setbasicrates(&ni->ni_rates, 425 IEEE80211_MODE_11B); 426 } 427 } 428 429 /* XXX TODO: other bits and pieces - eg fast-frames? */ 430 431 /* If we're an 11n channel then initialise the 11n bits */ 432 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { 433 /* XXX what else? */ 434 ieee80211_ht_node_init(ni); 435 ieee80211_vht_node_init(ni); 436 } else if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 437 /* XXX what else? */ 438 ieee80211_ht_node_init(ni); 439 } 440 441 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 442 } 443 444 /* 445 * Reset bss state on transition to the INIT state. 446 * Clear any stations from the table (they have been 447 * deauth'd) and reset the bss node (clears key, rate 448 * etc. state). 449 */ 450 void 451 ieee80211_reset_bss(struct ieee80211vap *vap) 452 { 453 struct ieee80211com *ic = vap->iv_ic; 454 struct ieee80211_node *ni, *obss; 455 456 ieee80211_node_table_reset(&ic->ic_sta, vap); 457 /* XXX multi-bss: wrong */ 458 ieee80211_vap_reset_erp(vap); 459 460 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 461 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 462 obss = vap->iv_update_bss(vap, ieee80211_ref_node(ni)); 463 if (obss != NULL) { 464 copy_bss(ni, obss); 465 ni->ni_intval = ic->ic_bintval; 466 ieee80211_free_node(obss); 467 } else 468 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 469 } 470 471 static int 472 match_ssid(const struct ieee80211_node *ni, 473 int nssid, const struct ieee80211_scan_ssid ssids[]) 474 { 475 int i; 476 477 for (i = 0; i < nssid; i++) { 478 if (ni->ni_esslen == ssids[i].len && 479 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 480 return 1; 481 } 482 return 0; 483 } 484 485 /* 486 * Test a node for suitability/compatibility. 487 */ 488 static int 489 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 490 { 491 struct ieee80211com *ic = ni->ni_ic; 492 uint8_t rate; 493 494 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 495 return 0; 496 if (vap->iv_opmode == IEEE80211_M_IBSS) { 497 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 498 return 0; 499 } else { 500 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 501 return 0; 502 } 503 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 504 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 505 return 0; 506 } else { 507 /* XXX does this mean privacy is supported or required? */ 508 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 509 return 0; 510 } 511 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 512 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 513 if (rate & IEEE80211_RATE_BASIC) 514 return 0; 515 if (vap->iv_des_nssid != 0 && 516 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 517 return 0; 518 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 519 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 520 return 0; 521 return 1; 522 } 523 524 #ifdef IEEE80211_DEBUG 525 /* 526 * Display node suitability/compatibility. 527 */ 528 static void 529 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 530 { 531 struct ieee80211com *ic = ni->ni_ic; 532 uint8_t rate; 533 int fail; 534 535 fail = 0; 536 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 537 fail |= 0x01; 538 if (vap->iv_opmode == IEEE80211_M_IBSS) { 539 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 540 fail |= 0x02; 541 } else { 542 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 543 fail |= 0x02; 544 } 545 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 546 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 547 fail |= 0x04; 548 } else { 549 /* XXX does this mean privacy is supported or required? */ 550 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 551 fail |= 0x04; 552 } 553 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 554 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 555 if (rate & IEEE80211_RATE_BASIC) 556 fail |= 0x08; 557 if (vap->iv_des_nssid != 0 && 558 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 559 fail |= 0x10; 560 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 561 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 562 fail |= 0x20; 563 564 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 565 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 566 printf(" %3d%c", 567 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 568 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 569 fail & 0x08 ? '!' : ' '); 570 printf(" %4s%c", 571 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 572 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 573 "????", 574 fail & 0x02 ? '!' : ' '); 575 printf(" %3s%c ", 576 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 577 fail & 0x04 ? '!' : ' '); 578 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 579 printf("%s\n", fail & 0x10 ? "!" : ""); 580 } 581 #endif /* IEEE80211_DEBUG */ 582 583 int 584 ieee80211_ibss_merge_check(struct ieee80211_node *ni) 585 { 586 struct ieee80211vap *vap = ni->ni_vap; 587 588 if (ni == vap->iv_bss || 589 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 590 /* unchanged, nothing to do */ 591 return 0; 592 } 593 594 if (!check_bss(vap, ni)) { 595 /* capabilities mismatch */ 596 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 597 "%s: merge failed, capabilities mismatch\n", __func__); 598 #ifdef IEEE80211_DEBUG 599 if (ieee80211_msg_assoc(vap)) 600 check_bss_debug(vap, ni); 601 #endif 602 vap->iv_stats.is_ibss_capmismatch++; 603 return 0; 604 } 605 606 return 1; 607 } 608 609 /* 610 * Check if the given node should populate the node table. 611 * 612 * We need to be in "see all beacons for all ssids" mode in order 613 * to do IBSS merges, however this means we will populate nodes for 614 * /all/ IBSS SSIDs, versus just the one we care about. 615 * 616 * So this check ensures the node can actually belong to our IBSS 617 * configuration. For now it simply checks the SSID. 618 */ 619 int 620 ieee80211_ibss_node_check_new(struct ieee80211_node *ni, 621 const struct ieee80211_scanparams *scan) 622 { 623 struct ieee80211vap *vap = ni->ni_vap; 624 int i; 625 626 /* 627 * If we have no SSID and no scan SSID, return OK. 628 */ 629 if (vap->iv_des_nssid == 0 && scan->ssid == NULL) 630 goto ok; 631 632 /* 633 * If we have one of (SSID, scan SSID) then return error. 634 */ 635 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL)) 636 goto mismatch; 637 638 /* 639 * Double-check - we need scan SSID. 640 */ 641 if (scan->ssid == NULL) 642 goto mismatch; 643 644 /* 645 * Check if the scan SSID matches the SSID list for the VAP. 646 */ 647 for (i = 0; i < vap->iv_des_nssid; i++) { 648 /* Sanity length check */ 649 if (vap->iv_des_ssid[i].len != scan->ssid[1]) 650 continue; 651 652 /* Note: SSID in the scan entry is the IE format */ 653 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2, 654 vap->iv_des_ssid[i].len) == 0) 655 goto ok; 656 } 657 658 mismatch: 659 return (0); 660 ok: 661 return (1); 662 } 663 664 /* 665 * Handle 802.11 ad hoc network merge. The 666 * convention, set by the Wireless Ethernet Compatibility Alliance 667 * (WECA), is that an 802.11 station will change its BSSID to match 668 * the "oldest" 802.11 ad hoc network, on the same channel, that 669 * has the station's desired SSID. The "oldest" 802.11 network 670 * sends beacons with the greatest TSF timestamp. 671 * 672 * The caller is assumed to validate TSF's before attempting a merge. 673 * 674 * Return !0 if the BSSID changed, 0 otherwise. 675 */ 676 int 677 ieee80211_ibss_merge(struct ieee80211_node *ni) 678 { 679 #ifdef IEEE80211_DEBUG 680 struct ieee80211vap *vap = ni->ni_vap; 681 #endif 682 683 if (! ieee80211_ibss_merge_check(ni)) 684 return 0; 685 686 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 687 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 688 ether_sprintf(ni->ni_bssid), 689 vap->iv_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 690 vap->iv_flags&IEEE80211_F_SHSLOT ? "short" : "long", 691 vap->iv_flags&IEEE80211_F_USEPROT ? ", protection" : "" 692 ); 693 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 694 } 695 696 /* 697 * Calculate HT channel promotion flags for all vaps. 698 * This assumes ni_chan have been setup for each vap. 699 */ 700 static int 701 gethtadjustflags(struct ieee80211com *ic) 702 { 703 struct ieee80211vap *vap; 704 int flags; 705 706 flags = 0; 707 /* XXX locking */ 708 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 709 if (vap->iv_state < IEEE80211_S_RUN) 710 continue; 711 switch (vap->iv_opmode) { 712 case IEEE80211_M_WDS: 713 case IEEE80211_M_STA: 714 case IEEE80211_M_AHDEMO: 715 case IEEE80211_M_HOSTAP: 716 case IEEE80211_M_IBSS: 717 case IEEE80211_M_MBSS: 718 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 719 break; 720 default: 721 break; 722 } 723 } 724 return flags; 725 } 726 727 /* 728 * Calculate VHT channel promotion flags for all vaps. 729 * This assumes ni_chan have been setup for each vap. 730 */ 731 static int 732 getvhtadjustflags(struct ieee80211com *ic) 733 { 734 struct ieee80211vap *vap; 735 int flags; 736 737 flags = 0; 738 /* XXX locking */ 739 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 740 if (vap->iv_state < IEEE80211_S_RUN) 741 continue; 742 switch (vap->iv_opmode) { 743 case IEEE80211_M_WDS: 744 case IEEE80211_M_STA: 745 case IEEE80211_M_AHDEMO: 746 case IEEE80211_M_HOSTAP: 747 case IEEE80211_M_IBSS: 748 case IEEE80211_M_MBSS: 749 flags |= ieee80211_vhtchanflags(vap->iv_bss->ni_chan); 750 break; 751 default: 752 break; 753 } 754 } 755 return flags; 756 } 757 758 /* 759 * Check if the current channel needs to change based on whether 760 * any vap's are using HT20/HT40. This is used to sync the state 761 * of ic_curchan after a channel width change on a running vap. 762 * 763 * Same applies for VHT. 764 */ 765 void 766 ieee80211_sync_curchan(struct ieee80211com *ic) 767 { 768 struct ieee80211_channel *c; 769 770 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 771 c = ieee80211_vht_adjust_channel(ic, c, getvhtadjustflags(ic)); 772 773 if (c != ic->ic_curchan) { 774 ic->ic_curchan = c; 775 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 776 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 777 IEEE80211_UNLOCK(ic); 778 ic->ic_set_channel(ic); 779 ieee80211_radiotap_chan_change(ic); 780 IEEE80211_LOCK(ic); 781 } 782 } 783 784 /* 785 * Setup the current channel. The request channel may be 786 * promoted if other vap's are operating with HT20/HT40. 787 */ 788 void 789 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 790 { 791 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 792 int flags = gethtadjustflags(ic); 793 /* 794 * Check for channel promotion required to support the 795 * set of running vap's. This assumes we are called 796 * after ni_chan is setup for each vap. 797 */ 798 /* XXX VHT? */ 799 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 800 if (flags > ieee80211_htchanflags(c)) 801 c = ieee80211_ht_adjust_channel(ic, c, flags); 802 } 803 804 /* 805 * VHT promotion - this will at least promote to VHT20/40 806 * based on what HT has done; it may further promote the 807 * channel to VHT80 or above. 808 */ 809 if (ic->ic_vhtcaps != 0) { 810 int flags = getvhtadjustflags(ic); 811 if (flags > ieee80211_vhtchanflags(c)) 812 c = ieee80211_vht_adjust_channel(ic, c, flags); 813 } 814 815 ic->ic_bsschan = ic->ic_curchan = c; 816 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 817 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 818 } 819 820 /* 821 * Change the current channel. The channel change is guaranteed to have 822 * happened before the next state change. 823 */ 824 void 825 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 826 { 827 ieee80211_setupcurchan(ic, c); 828 ieee80211_runtask(ic, &ic->ic_chan_task); 829 } 830 831 void 832 ieee80211_update_chw(struct ieee80211com *ic) 833 { 834 835 ieee80211_setupcurchan(ic, ic->ic_curchan); 836 ieee80211_runtask(ic, &ic->ic_chw_task); 837 } 838 839 /* 840 * Join the specified IBSS/BSS network. The node is assumed to 841 * be passed in with a held reference. 842 */ 843 static int 844 ieee80211_sta_join1(struct ieee80211_node *selbs) 845 { 846 struct ieee80211vap *vap = selbs->ni_vap; 847 struct ieee80211com *ic = selbs->ni_ic; 848 struct ieee80211_node *obss; 849 int canreassoc; 850 851 /* 852 * Committed to selbs, setup state. 853 */ 854 obss = vap->iv_update_bss(vap, selbs); /* NB: caller assumed to bump refcnt */ 855 /* 856 * Check if old+new node have the same address in which 857 * case we can reassociate when operating in sta mode. 858 */ 859 /* XXX We'll not be in RUN anymore as iv_state got updated already? */ 860 canreassoc = (obss != NULL && 861 vap->iv_state == IEEE80211_S_RUN && 862 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 863 if (obss != NULL) { 864 struct ieee80211_node_table *nt = obss->ni_table; 865 866 copy_bss(selbs, obss); 867 ieee80211_node_decref(obss); /* iv_bss reference */ 868 869 IEEE80211_NODE_LOCK(nt); 870 node_reclaim(nt, obss); /* station table reference */ 871 IEEE80211_NODE_UNLOCK(nt); 872 873 obss = NULL; /* NB: guard against later use */ 874 } 875 876 /* 877 * Delete unusable rates; we've already checked 878 * that the negotiated rate set is acceptable. 879 */ 880 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 881 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 882 883 ieee80211_setcurchan(ic, selbs->ni_chan); 884 /* 885 * Set the erp state (mostly the slot time) to deal with 886 * the auto-select case; this should be redundant if the 887 * mode is locked. 888 */ 889 ieee80211_vap_reset_erp(vap); 890 ieee80211_wme_initparams(vap); 891 892 if (vap->iv_opmode == IEEE80211_M_STA) { 893 if (canreassoc) { 894 /* Reassociate */ 895 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 896 } else { 897 /* 898 * Act as if we received a DEAUTH frame in case we 899 * are invoked from the RUN state. This will cause 900 * us to try to re-authenticate if we are operating 901 * as a station. 902 */ 903 IEEE80211_DPRINTF(vap, IEEE80211_MSG_AUTH, 904 "%s %p<%s> %s -> AUTH, FC0_SUBTYPE_DEAUTH\n", 905 __func__, selbs, ether_sprintf(selbs->ni_macaddr), 906 ieee80211_state_name[vap->iv_state]); 907 ieee80211_new_state(vap, IEEE80211_S_AUTH, 908 IEEE80211_FC0_SUBTYPE_DEAUTH); 909 } 910 } else 911 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 912 return 1; 913 } 914 915 int 916 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 917 const struct ieee80211_scan_entry *se) 918 { 919 struct ieee80211com *ic = vap->iv_ic; 920 struct ieee80211_node *ni; 921 int do_ht = 0; 922 923 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 924 if (ni == NULL) { 925 /* XXX msg */ 926 return 0; 927 } 928 929 /* 930 * Expand scan state into node's format. 931 * XXX may not need all this stuff 932 */ 933 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 934 ni->ni_esslen = se->se_ssid[1]; 935 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 936 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 937 ni->ni_intval = se->se_intval; 938 ni->ni_capinfo = se->se_capinfo; 939 ni->ni_chan = chan; 940 ni->ni_timoff = se->se_timoff; 941 ni->ni_fhdwell = se->se_fhdwell; 942 ni->ni_fhindex = se->se_fhindex; 943 ni->ni_erp = se->se_erp; 944 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 945 ni->ni_noise = se->se_noise; 946 if (vap->iv_opmode == IEEE80211_M_STA) { 947 /* NB: only infrastructure mode requires an associd */ 948 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 949 } 950 951 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 952 ieee80211_ies_expand(&ni->ni_ies); 953 #ifdef IEEE80211_SUPPORT_SUPERG 954 if (ni->ni_ies.ath_ie != NULL) 955 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 956 #endif 957 if (ni->ni_ies.htcap_ie != NULL) 958 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 959 if (ni->ni_ies.htinfo_ie != NULL) 960 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 961 #ifdef IEEE80211_SUPPORT_MESH 962 if (ni->ni_ies.meshid_ie != NULL) 963 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 964 #endif 965 #ifdef IEEE80211_SUPPORT_TDMA 966 if (ni->ni_ies.tdma_ie != NULL) 967 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 968 #endif 969 if (ni->ni_ies.vhtcap_ie != NULL) 970 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 971 if (ni->ni_ies.vhtopmode_ie != NULL) 972 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 973 974 /* XXX parse BSSLOAD IE */ 975 /* XXX parse TXPWRENV IE */ 976 /* XXX parse APCHANREP IE */ 977 } 978 979 vap->iv_dtim_period = se->se_dtimperiod; 980 vap->iv_dtim_count = 0; 981 982 /* NB: must be after ni_chan is setup */ 983 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 984 IEEE80211_F_DOSORT); 985 if (ieee80211_iserp_rateset(&ni->ni_rates)) 986 ni->ni_flags |= IEEE80211_NODE_ERP; 987 988 /* 989 * Setup HT state for this node if it's available, otherwise 990 * non-STA modes won't pick this state up. 991 * 992 * For IBSS and related modes that don't go through an 993 * association request/response, the only appropriate place 994 * to setup the HT state is here. 995 */ 996 if (ni->ni_ies.htinfo_ie != NULL && 997 ni->ni_ies.htcap_ie != NULL && 998 vap->iv_flags_ht & IEEE80211_FHT_HT) { 999 ieee80211_ht_node_init(ni); 1000 ieee80211_ht_updateparams(ni, 1001 ni->ni_ies.htcap_ie, 1002 ni->ni_ies.htinfo_ie); 1003 do_ht = 1; 1004 } 1005 1006 /* 1007 * Setup VHT state for this node if it's available. 1008 * Same as the above. 1009 * 1010 * For now, don't allow 2GHz VHT operation. 1011 */ 1012 if (ni->ni_ies.vhtopmode_ie != NULL && 1013 ni->ni_ies.vhtcap_ie != NULL && 1014 vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1015 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1016 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1017 __func__, 1018 ni->ni_macaddr, 1019 ":"); 1020 } else { 1021 ieee80211_vht_node_init(ni); 1022 ieee80211_vht_updateparams(ni, 1023 ni->ni_ies.vhtcap_ie, 1024 ni->ni_ies.vhtopmode_ie); 1025 ieee80211_setup_vht_rates(ni, ni->ni_ies.vhtcap_ie, 1026 ni->ni_ies.vhtopmode_ie); 1027 do_ht = 1; 1028 } 1029 } 1030 1031 /* Finally do the node channel change */ 1032 if (do_ht) { 1033 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1034 ni->ni_ies.htinfo_ie); 1035 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 1036 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1037 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 1038 } 1039 1040 /* XXX else check for ath FF? */ 1041 /* XXX QoS? Difficult given that WME config is specific to a master */ 1042 1043 ieee80211_node_setuptxparms(ni); 1044 ieee80211_ratectl_node_init(ni); 1045 1046 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 1047 } 1048 1049 /* 1050 * Leave the specified IBSS/BSS network. The node is assumed to 1051 * be passed in with a held reference. 1052 */ 1053 void 1054 ieee80211_sta_leave(struct ieee80211_node *ni) 1055 { 1056 struct ieee80211com *ic = ni->ni_ic; 1057 1058 ic->ic_node_cleanup(ni); 1059 ieee80211_notify_node_leave(ni); 1060 } 1061 1062 /* 1063 * Send a deauthenticate frame and drop the station. 1064 */ 1065 void 1066 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 1067 { 1068 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 1069 ieee80211_ref_node(ni); 1070 if (ni->ni_associd != 0) 1071 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 1072 ieee80211_node_leave(ni); 1073 ieee80211_free_node(ni); 1074 } 1075 1076 static struct ieee80211_node * 1077 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1078 { 1079 struct ieee80211_node *ni; 1080 1081 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), 1082 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1083 return ni; 1084 } 1085 1086 static int 1087 node_init(struct ieee80211_node *ni) 1088 { 1089 return 0; 1090 } 1091 1092 /* 1093 * Initialize an ie blob with the specified data. If previous 1094 * data exists re-use the data block. As a side effect we clear 1095 * all references to specific ie's; the caller is required to 1096 * recalculate them. 1097 */ 1098 int 1099 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 1100 { 1101 /* NB: assumes data+len are the last fields */ 1102 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 1103 if (ies->data != NULL && ies->len != len) { 1104 /* data size changed */ 1105 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1106 ies->data = NULL; 1107 } 1108 if (ies->data == NULL) { 1109 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 1110 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1111 if (ies->data == NULL) { 1112 ies->len = 0; 1113 /* NB: pointers have already been zero'd above */ 1114 return 0; 1115 } 1116 } 1117 memcpy(ies->data, data, len); 1118 ies->len = len; 1119 return 1; 1120 } 1121 1122 /* 1123 * Reclaim storage for an ie blob. 1124 */ 1125 void 1126 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 1127 { 1128 if (ies->data != NULL) 1129 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1130 } 1131 1132 /* 1133 * Expand an ie blob data contents and to fillin individual 1134 * ie pointers. The data blob is assumed to be well-formed; 1135 * we don't do any validity checking of ie lengths. 1136 */ 1137 void 1138 ieee80211_ies_expand(struct ieee80211_ies *ies) 1139 { 1140 uint8_t *ie; 1141 int ielen; 1142 1143 ie = ies->data; 1144 ielen = ies->len; 1145 while (ielen > 1) { 1146 /* Make sure the given IE length fits into the total length. */ 1147 if ((2 + ie[1]) > ielen) { 1148 printf("%s: malformed IEs! ies %p { data %p len %d }: " 1149 "ie %u len 2+%u > total len left %d\n", 1150 __func__, ies, ies->data, ies->len, 1151 ie[0], ie[1], ielen); 1152 return; 1153 } 1154 switch (ie[0]) { 1155 case IEEE80211_ELEMID_VENDOR: 1156 if (iswpaoui(ie)) 1157 ies->wpa_ie = ie; 1158 else if (iswmeoui(ie)) 1159 ies->wme_ie = ie; 1160 #ifdef IEEE80211_SUPPORT_SUPERG 1161 else if (isatherosoui(ie)) 1162 ies->ath_ie = ie; 1163 #endif 1164 #ifdef IEEE80211_SUPPORT_TDMA 1165 else if (istdmaoui(ie)) 1166 ies->tdma_ie = ie; 1167 #endif 1168 break; 1169 case IEEE80211_ELEMID_RSN: 1170 ies->rsn_ie = ie; 1171 break; 1172 case IEEE80211_ELEMID_HTCAP: 1173 ies->htcap_ie = ie; 1174 break; 1175 case IEEE80211_ELEMID_HTINFO: 1176 ies->htinfo_ie = ie; 1177 break; 1178 #ifdef IEEE80211_SUPPORT_MESH 1179 case IEEE80211_ELEMID_MESHID: 1180 ies->meshid_ie = ie; 1181 break; 1182 #endif 1183 case IEEE80211_ELEMID_VHT_CAP: 1184 ies->vhtcap_ie = ie; 1185 break; 1186 case IEEE80211_ELEMID_VHT_OPMODE: 1187 ies->vhtopmode_ie = ie; 1188 break; 1189 case IEEE80211_ELEMID_VHT_PWR_ENV: 1190 ies->vhtpwrenv_ie = ie; 1191 break; 1192 case IEEE80211_ELEMID_BSSLOAD: 1193 ies->bssload_ie = ie; 1194 break; 1195 case IEEE80211_ELEMID_APCHANREP: 1196 ies->apchanrep_ie = ie; 1197 break; 1198 } 1199 ielen -= 2 + ie[1]; 1200 ie += 2 + ie[1]; 1201 } 1202 } 1203 1204 /* 1205 * Reclaim any resources in a node and reset any critical 1206 * state. Typically nodes are free'd immediately after, 1207 * but in some cases the storage may be reused so we need 1208 * to insure consistent state (should probably fix that). 1209 */ 1210 static void 1211 node_cleanup(struct ieee80211_node *ni) 1212 { 1213 struct ieee80211vap *vap = ni->ni_vap; 1214 struct ieee80211com *ic = ni->ni_ic; 1215 int i; 1216 1217 /* NB: preserve ni_table */ 1218 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1219 if (vap->iv_opmode != IEEE80211_M_STA) 1220 vap->iv_ps_sta--; 1221 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1222 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1223 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1224 } 1225 /* 1226 * Cleanup any VHT and HT-related state. 1227 */ 1228 if (ni->ni_flags & IEEE80211_NODE_VHT) 1229 ieee80211_vht_node_cleanup(ni); 1230 if (ni->ni_flags & IEEE80211_NODE_HT) 1231 ieee80211_ht_node_cleanup(ni); 1232 #ifdef IEEE80211_SUPPORT_SUPERG 1233 /* Always do FF node cleanup; for A-MSDU */ 1234 ieee80211_ff_node_cleanup(ni); 1235 #endif 1236 #ifdef IEEE80211_SUPPORT_MESH 1237 /* 1238 * Cleanup any mesh-related state. 1239 */ 1240 if (vap->iv_opmode == IEEE80211_M_MBSS) 1241 ieee80211_mesh_node_cleanup(ni); 1242 #endif 1243 /* 1244 * Clear any staging queue entries. 1245 */ 1246 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1247 1248 /* 1249 * Clear AREF flag that marks the authorization refcnt bump 1250 * has happened. This is probably not needed as the node 1251 * should always be removed from the table so not found but 1252 * do it just in case. 1253 * Likewise clear the ASSOCID flag as these flags are intended 1254 * to be managed in tandem. 1255 */ 1256 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1257 1258 /* 1259 * Drain power save queue and, if needed, clear TIM. 1260 */ 1261 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1262 vap->iv_set_tim(ni, 0); 1263 1264 ni->ni_associd = 0; 1265 if (ni->ni_challenge != NULL) { 1266 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1267 ni->ni_challenge = NULL; 1268 } 1269 /* 1270 * Preserve SSID, WPA, and WME ie's so the bss node is 1271 * reusable during a re-auth/re-assoc state transition. 1272 * If we remove these data they will not be recreated 1273 * because they come from a probe-response or beacon frame 1274 * which cannot be expected prior to the association-response. 1275 * This should not be an issue when operating in other modes 1276 * as stations leaving always go through a full state transition 1277 * which will rebuild this state. 1278 * 1279 * XXX does this leave us open to inheriting old state? 1280 */ 1281 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1282 if (ni->ni_rxfrag[i] != NULL) { 1283 m_freem(ni->ni_rxfrag[i]); 1284 ni->ni_rxfrag[i] = NULL; 1285 } 1286 /* 1287 * Must be careful here to remove any key map entry w/o a LOR. 1288 */ 1289 ieee80211_node_delucastkey(ni); 1290 } 1291 1292 static void 1293 node_free(struct ieee80211_node *ni) 1294 { 1295 struct ieee80211com *ic = ni->ni_ic; 1296 1297 ieee80211_ratectl_node_deinit(ni); 1298 ic->ic_node_cleanup(ni); 1299 ieee80211_ies_cleanup(&ni->ni_ies); 1300 ieee80211_psq_cleanup(&ni->ni_psq); 1301 IEEE80211_FREE(ni, M_80211_NODE); 1302 } 1303 1304 static void 1305 node_age(struct ieee80211_node *ni) 1306 { 1307 struct ieee80211vap *vap = ni->ni_vap; 1308 1309 /* 1310 * Age frames on the power save queue. 1311 */ 1312 if (ieee80211_node_psq_age(ni) != 0 && 1313 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1314 vap->iv_set_tim(ni, 0); 1315 /* 1316 * Age out HT resources (e.g. frames on the 1317 * A-MPDU reorder queues). 1318 */ 1319 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1320 ieee80211_ht_node_age(ni); 1321 } 1322 1323 static int8_t 1324 node_getrssi(const struct ieee80211_node *ni) 1325 { 1326 uint32_t avgrssi = ni->ni_avgrssi; 1327 int32_t rssi; 1328 1329 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1330 return 0; 1331 rssi = IEEE80211_RSSI_GET(avgrssi); 1332 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1333 } 1334 1335 static void 1336 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1337 { 1338 *rssi = node_getrssi(ni); 1339 *noise = ni->ni_noise; 1340 } 1341 1342 static void 1343 node_getmimoinfo(const struct ieee80211_node *ni, 1344 struct ieee80211_mimo_info *info) 1345 { 1346 int i; 1347 uint32_t avgrssi; 1348 int32_t rssi; 1349 1350 bzero(info, sizeof(*info)); 1351 1352 for (i = 0; i < MIN(IEEE80211_MAX_CHAINS, ni->ni_mimo_chains); i++) { 1353 /* Note: for now, just pri20 channel info */ 1354 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1355 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1356 info->ch[i].rssi[0] = 0; 1357 } else { 1358 rssi = IEEE80211_RSSI_GET(avgrssi); 1359 info->ch[i].rssi[0] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1360 } 1361 info->ch[i].noise[0] = ni->ni_mimo_noise_ctl[i]; 1362 } 1363 1364 /* XXX ext radios? */ 1365 1366 /* XXX EVM? */ 1367 } 1368 1369 static void 1370 ieee80211_add_node_nt(struct ieee80211_node_table *nt, 1371 struct ieee80211_node *ni) 1372 { 1373 struct ieee80211com *ic = nt->nt_ic; 1374 int hash; 1375 1376 IEEE80211_NODE_LOCK_ASSERT(nt); 1377 1378 hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr); 1379 (void) ic; /* XXX IEEE80211_NODE_HASH */ 1380 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1381 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1382 nt->nt_count++; 1383 ni->ni_table = nt; 1384 } 1385 1386 static void 1387 ieee80211_del_node_nt(struct ieee80211_node_table *nt, 1388 struct ieee80211_node *ni) 1389 { 1390 1391 IEEE80211_NODE_LOCK_ASSERT(nt); 1392 1393 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1394 LIST_REMOVE(ni, ni_hash); 1395 nt->nt_count--; 1396 KASSERT(nt->nt_count >= 0, 1397 ("nt_count is negative (%d)!\n", nt->nt_count)); 1398 ni->ni_table = NULL; 1399 } 1400 1401 struct ieee80211_node * 1402 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1403 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1404 { 1405 struct ieee80211com *ic = nt->nt_ic; 1406 struct ieee80211_node *ni; 1407 1408 ni = ic->ic_node_alloc(vap, macaddr); 1409 if (ni == NULL) { 1410 vap->iv_stats.is_rx_nodealloc++; 1411 return NULL; 1412 } 1413 1414 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1415 "%s %p<%s> in %s table\n", __func__, ni, 1416 ether_sprintf(macaddr), nt->nt_name); 1417 1418 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1419 ieee80211_node_initref(ni); /* mark referenced */ 1420 ni->ni_chan = IEEE80211_CHAN_ANYC; 1421 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1422 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1423 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1424 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1425 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1426 ni->ni_inact_reload = nt->nt_inact_init; 1427 ni->ni_inact = ni->ni_inact_reload; 1428 ni->ni_ath_defkeyix = 0x7fff; 1429 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1430 #ifdef IEEE80211_SUPPORT_MESH 1431 if (vap->iv_opmode == IEEE80211_M_MBSS) 1432 ieee80211_mesh_node_init(vap, ni); 1433 #endif 1434 IEEE80211_NODE_LOCK(nt); 1435 ieee80211_add_node_nt(nt, ni); 1436 ni->ni_vap = vap; 1437 ni->ni_ic = ic; 1438 IEEE80211_NODE_UNLOCK(nt); 1439 1440 /* handle failure; free node state */ 1441 if (ic->ic_node_init(ni) != 0) { 1442 vap->iv_stats.is_rx_nodealloc++; 1443 ieee80211_psq_cleanup(&ni->ni_psq); 1444 ieee80211_ratectl_node_deinit(ni); 1445 __ieee80211_free_node(ni); 1446 return NULL; 1447 } 1448 1449 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1450 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1451 1452 return ni; 1453 } 1454 1455 /* 1456 * Craft a temporary node suitable for sending a management frame 1457 * to the specified station. We craft only as much state as we 1458 * need to do the work since the node will be immediately reclaimed 1459 * once the send completes. 1460 */ 1461 struct ieee80211_node * 1462 ieee80211_tmp_node(struct ieee80211vap *vap, 1463 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1464 { 1465 struct ieee80211com *ic = vap->iv_ic; 1466 struct ieee80211_node *ni; 1467 1468 ni = ic->ic_node_alloc(vap, macaddr); 1469 if (ni != NULL) { 1470 struct ieee80211_node *bss = vap->iv_bss; 1471 1472 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1473 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1474 1475 ni->ni_table = NULL; /* NB: pedantic */ 1476 ni->ni_ic = ic; /* NB: needed to set channel */ 1477 ni->ni_vap = vap; 1478 1479 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1480 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1481 ieee80211_node_initref(ni); /* mark referenced */ 1482 /* NB: required by ieee80211_fix_rate */ 1483 ieee80211_node_set_chan(ni, bss->ni_chan); 1484 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1485 IEEE80211_KEYIX_NONE); 1486 ni->ni_txpower = bss->ni_txpower; 1487 /* XXX optimize away */ 1488 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1489 1490 ieee80211_ratectl_node_init(ni); 1491 1492 /* handle failure; free node state */ 1493 if (ic->ic_node_init(ni) != 0) { 1494 vap->iv_stats.is_rx_nodealloc++; 1495 ieee80211_psq_cleanup(&ni->ni_psq); 1496 ieee80211_ratectl_node_deinit(ni); 1497 __ieee80211_free_node(ni); 1498 return NULL; 1499 } 1500 1501 } else { 1502 /* XXX msg */ 1503 vap->iv_stats.is_rx_nodealloc++; 1504 } 1505 return ni; 1506 } 1507 1508 struct ieee80211_node * 1509 ieee80211_dup_bss(struct ieee80211vap *vap, 1510 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1511 { 1512 struct ieee80211com *ic = vap->iv_ic; 1513 struct ieee80211_node *ni; 1514 1515 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1516 if (ni != NULL) { 1517 struct ieee80211_node *bss = vap->iv_bss; 1518 /* 1519 * Inherit from iv_bss. 1520 */ 1521 copy_bss(ni, bss); 1522 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1523 ieee80211_node_set_chan(ni, bss->ni_chan); 1524 } 1525 return ni; 1526 } 1527 1528 /* 1529 * Create a bss node for a legacy WDS vap. The far end does 1530 * not associate so we just create create a new node and 1531 * simulate an association. The caller is responsible for 1532 * installing the node as the bss node and handling any further 1533 * setup work like authorizing the port. 1534 */ 1535 struct ieee80211_node * 1536 ieee80211_node_create_wds(struct ieee80211vap *vap, 1537 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1538 { 1539 struct ieee80211com *ic = vap->iv_ic; 1540 struct ieee80211_node *ni; 1541 1542 /* XXX check if node already in sta table? */ 1543 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1544 if (ni != NULL) { 1545 ni->ni_wdsvap = vap; 1546 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1547 /* 1548 * Inherit any manually configured settings. 1549 */ 1550 copy_bss(ni, vap->iv_bss); 1551 ieee80211_node_set_chan(ni, chan); 1552 /* NB: propagate ssid so available to WPA supplicant */ 1553 ni->ni_esslen = vap->iv_des_ssid[0].len; 1554 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1555 /* NB: no associd for peer */ 1556 /* 1557 * There are no management frames to use to 1558 * discover neighbor capabilities, so blindly 1559 * propagate the local configuration. 1560 */ 1561 if (vap->iv_flags & IEEE80211_F_WME) 1562 ni->ni_flags |= IEEE80211_NODE_QOS; 1563 #ifdef IEEE80211_SUPPORT_SUPERG 1564 if (vap->iv_flags & IEEE80211_F_FF) 1565 ni->ni_flags |= IEEE80211_NODE_FF; 1566 #endif 1567 /* XXX VHT */ 1568 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1569 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1570 /* 1571 * Device is HT-capable and HT is enabled for 1572 * the vap; setup HT operation. On return 1573 * ni_chan will be adjusted to an HT channel. 1574 */ 1575 ieee80211_ht_wds_init(ni); 1576 if (vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1577 printf("%s: TODO: vht_wds_init\n", __func__); 1578 } 1579 } else { 1580 struct ieee80211_channel *c = ni->ni_chan; 1581 /* 1582 * Force a legacy channel to be used. 1583 */ 1584 c = ieee80211_find_channel(ic, 1585 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1586 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1587 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1588 ni->ni_chan = c; 1589 } 1590 } 1591 return ni; 1592 } 1593 1594 struct ieee80211_node * 1595 _ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1596 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1597 const char *func __debrefcnt_used, int line __debrefcnt_used) 1598 { 1599 struct ieee80211_node *ni; 1600 int hash; 1601 1602 IEEE80211_NODE_LOCK_ASSERT(nt); 1603 1604 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1605 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1606 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1607 ieee80211_ref_node(ni); /* mark referenced */ 1608 #ifdef IEEE80211_DEBUG_REFCNT 1609 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1610 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1611 func, line, 1612 ni, ether_sprintf(ni->ni_macaddr), 1613 ieee80211_node_refcnt(ni)); 1614 #endif 1615 return ni; 1616 } 1617 } 1618 return NULL; 1619 } 1620 1621 struct ieee80211_node * 1622 _ieee80211_find_node(struct ieee80211_node_table *nt, 1623 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1624 const char *func __debrefcnt_used, int line __debrefcnt_used) 1625 { 1626 struct ieee80211_node *ni; 1627 1628 IEEE80211_NODE_LOCK(nt); 1629 ni = _ieee80211_find_node_locked(nt, macaddr, func, line); 1630 IEEE80211_NODE_UNLOCK(nt); 1631 return ni; 1632 } 1633 1634 struct ieee80211_node * 1635 _ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1636 const struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN], 1637 const char *func __debrefcnt_used, int line __debrefcnt_used) 1638 { 1639 struct ieee80211_node *ni; 1640 int hash; 1641 1642 IEEE80211_NODE_LOCK_ASSERT(nt); 1643 1644 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1645 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1646 if (ni->ni_vap == vap && 1647 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1648 ieee80211_ref_node(ni); /* mark referenced */ 1649 #ifdef IEEE80211_DEBUG_REFCNT 1650 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1651 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1652 func, line, 1653 ni, ether_sprintf(ni->ni_macaddr), 1654 ieee80211_node_refcnt(ni)); 1655 #endif 1656 return ni; 1657 } 1658 } 1659 return NULL; 1660 } 1661 1662 struct ieee80211_node * 1663 _ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1664 const struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN], 1665 const char *func __debrefcnt_used, int line __debrefcnt_used) 1666 { 1667 struct ieee80211_node *ni; 1668 1669 IEEE80211_NODE_LOCK(nt); 1670 ni = _ieee80211_find_vap_node_locked(nt, vap, macaddr, func, line); 1671 IEEE80211_NODE_UNLOCK(nt); 1672 return ni; 1673 } 1674 1675 /* 1676 * Fake up a node; this handles node discovery in adhoc mode. 1677 * Note that for the driver's benefit we we treat this like 1678 * an association so the driver has an opportunity to setup 1679 * it's private state. 1680 */ 1681 struct ieee80211_node * 1682 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1683 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1684 { 1685 struct ieee80211_node *ni; 1686 1687 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1688 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1689 ni = ieee80211_dup_bss(vap, macaddr); 1690 if (ni != NULL) { 1691 struct ieee80211com *ic = vap->iv_ic; 1692 1693 /* XXX no rate negotiation; just dup */ 1694 ni->ni_rates = vap->iv_bss->ni_rates; 1695 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1696 ni->ni_flags |= IEEE80211_NODE_ERP; 1697 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1698 /* 1699 * In adhoc demo mode there are no management 1700 * frames to use to discover neighbor capabilities, 1701 * so blindly propagate the local configuration 1702 * so we can do interesting things (e.g. use 1703 * WME to disable ACK's). 1704 */ 1705 /* 1706 * XXX TODO: 11n? 1707 */ 1708 if (vap->iv_flags & IEEE80211_F_WME) 1709 ni->ni_flags |= IEEE80211_NODE_QOS; 1710 #ifdef IEEE80211_SUPPORT_SUPERG 1711 if (vap->iv_flags & IEEE80211_F_FF) 1712 ni->ni_flags |= IEEE80211_NODE_FF; 1713 #endif 1714 } 1715 ieee80211_node_setuptxparms(ni); 1716 ieee80211_ratectl_node_init(ni); 1717 1718 /* 1719 * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX, 1720 * not A-MPDU TX; not 11n rates, etc. We'll cycle 1721 * that after we hear that we can indeed do 11n 1722 * (either by a beacon frame or by a probe response.) 1723 */ 1724 1725 /* 1726 * This is the first time we see the node. 1727 */ 1728 if (ic->ic_newassoc != NULL) 1729 ic->ic_newassoc(ni, 1); 1730 1731 /* 1732 * Kick off a probe request to the given node; 1733 * we will then use the probe response to update 1734 * 11n/etc configuration state. 1735 * 1736 * XXX TODO: this isn't guaranteed, and until we get 1737 * a probe response, we won't be able to actually 1738 * do anything 802.11n related to the node. 1739 * So if this does indeed work, maybe we should hold 1740 * off on sending responses until we get the probe 1741 * response, or just default to some sensible subset 1742 * of 802.11n behaviour (eg always allow aggregation 1743 * negotiation TO us, but not FROM us, etc) so we 1744 * aren't entirely busted. 1745 */ 1746 if (vap->iv_opmode == IEEE80211_M_IBSS) { 1747 ieee80211_send_probereq(ni, /* node */ 1748 vap->iv_myaddr, /* SA */ 1749 ni->ni_macaddr, /* DA */ 1750 vap->iv_bss->ni_bssid, /* BSSID */ 1751 vap->iv_bss->ni_essid, 1752 vap->iv_bss->ni_esslen); /* SSID */ 1753 } 1754 1755 /* XXX not right for 802.1x/WPA */ 1756 ieee80211_node_authorize(ni); 1757 } 1758 return ni; 1759 } 1760 1761 void 1762 ieee80211_init_neighbor(struct ieee80211_node *ni, 1763 const struct ieee80211_frame *wh, 1764 const struct ieee80211_scanparams *sp) 1765 { 1766 int do_ht_setup = 0, do_vht_setup = 0; 1767 1768 ni->ni_esslen = sp->ssid[1]; 1769 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1770 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1771 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1772 ni->ni_intval = sp->bintval; 1773 ni->ni_capinfo = sp->capinfo; 1774 ni->ni_chan = ni->ni_ic->ic_curchan; 1775 ni->ni_fhdwell = sp->fhdwell; 1776 ni->ni_fhindex = sp->fhindex; 1777 ni->ni_erp = sp->erp; 1778 ni->ni_timoff = sp->timoff; 1779 #ifdef IEEE80211_SUPPORT_MESH 1780 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1781 ieee80211_mesh_init_neighbor(ni, wh, sp); 1782 #endif 1783 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1784 ieee80211_ies_expand(&ni->ni_ies); 1785 if (ni->ni_ies.wme_ie != NULL) 1786 ni->ni_flags |= IEEE80211_NODE_QOS; 1787 else 1788 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1789 #ifdef IEEE80211_SUPPORT_SUPERG 1790 if (ni->ni_ies.ath_ie != NULL) 1791 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1792 #endif 1793 if (ni->ni_ies.htcap_ie != NULL) 1794 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1795 if (ni->ni_ies.htinfo_ie != NULL) 1796 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1797 1798 if (ni->ni_ies.vhtcap_ie != NULL) 1799 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 1800 if (ni->ni_ies.vhtopmode_ie != NULL) 1801 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 1802 1803 if ((ni->ni_ies.htcap_ie != NULL) && 1804 (ni->ni_ies.htinfo_ie != NULL) && 1805 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1806 do_ht_setup = 1; 1807 } 1808 1809 if ((ni->ni_ies.vhtcap_ie != NULL) && 1810 (ni->ni_ies.vhtopmode_ie != NULL) && 1811 (ni->ni_vap->iv_flags_vht & IEEE80211_FVHT_VHT)) { 1812 do_vht_setup = 1; 1813 } 1814 } 1815 1816 /* NB: must be after ni_chan is setup */ 1817 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1818 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1819 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1820 1821 /* 1822 * If the neighbor is HT compatible, flip that on. 1823 */ 1824 if (do_ht_setup) { 1825 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1826 "%s: doing HT setup\n", __func__); 1827 ieee80211_ht_node_init(ni); 1828 ieee80211_ht_updateparams(ni, 1829 ni->ni_ies.htcap_ie, 1830 ni->ni_ies.htinfo_ie); 1831 1832 if (do_vht_setup) { 1833 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1834 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1835 __func__, 1836 ni->ni_macaddr, 1837 ":"); 1838 } else { 1839 ieee80211_vht_node_init(ni); 1840 ieee80211_vht_updateparams(ni, 1841 ni->ni_ies.vhtcap_ie, 1842 ni->ni_ies.vhtopmode_ie); 1843 ieee80211_setup_vht_rates(ni, 1844 ni->ni_ies.vhtcap_ie, 1845 ni->ni_ies.vhtopmode_ie); 1846 } 1847 } 1848 1849 /* 1850 * Finally do the channel upgrade/change based 1851 * on the HT/VHT configuration. 1852 */ 1853 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1854 ni->ni_ies.htinfo_ie); 1855 ieee80211_setup_htrates(ni, 1856 ni->ni_ies.htcap_ie, 1857 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1858 ieee80211_setup_basic_htrates(ni, 1859 ni->ni_ies.htinfo_ie); 1860 1861 ieee80211_node_setuptxparms(ni); 1862 ieee80211_ratectl_node_init(ni); 1863 1864 /* Reassociate; we're now 11n/11ac */ 1865 /* 1866 * XXX TODO: this is the wrong thing to do - 1867 * we're calling it with isnew=1 so the ath(4) 1868 * driver reinitialises the rate tables. 1869 * This "mostly" works for ath(4), but it won't 1870 * be right for firmware devices which allocate 1871 * node states. 1872 * 1873 * So, do we just create a new node and delete 1874 * the old one? Or? 1875 */ 1876 if (ni->ni_ic->ic_newassoc) 1877 ni->ni_ic->ic_newassoc(ni, 1); 1878 } 1879 } 1880 1881 /* 1882 * Do node discovery in adhoc mode on receipt of a beacon 1883 * or probe response frame. Note that for the driver's 1884 * benefit we we treat this like an association so the 1885 * driver has an opportunity to setup it's private state. 1886 */ 1887 struct ieee80211_node * 1888 ieee80211_add_neighbor(struct ieee80211vap *vap, 1889 const struct ieee80211_frame *wh, 1890 const struct ieee80211_scanparams *sp) 1891 { 1892 struct ieee80211_node *ni; 1893 1894 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1895 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1896 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1897 if (ni != NULL) { 1898 struct ieee80211com *ic = vap->iv_ic; 1899 1900 ieee80211_init_neighbor(ni, wh, sp); 1901 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1902 ni->ni_flags |= IEEE80211_NODE_ERP; 1903 ieee80211_node_setuptxparms(ni); 1904 ieee80211_ratectl_node_init(ni); 1905 if (ic->ic_newassoc != NULL) 1906 ic->ic_newassoc(ni, 1); 1907 /* XXX not right for 802.1x/WPA */ 1908 ieee80211_node_authorize(ni); 1909 } 1910 return ni; 1911 } 1912 1913 #define IS_PROBEREQ(wh) \ 1914 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1915 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1916 #define IS_BCAST_PROBEREQ(wh) \ 1917 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1918 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1919 1920 static __inline struct ieee80211_node * 1921 _find_rxnode(struct ieee80211_node_table *nt, 1922 const struct ieee80211_frame_min *wh, 1923 const char *func __debrefcnt_used, int line __debrefcnt_used) 1924 { 1925 if (IS_BCAST_PROBEREQ(wh)) 1926 return NULL; /* spam bcast probe req to all vap's */ 1927 return _ieee80211_find_node_locked(nt, wh->i_addr2, func, line); 1928 } 1929 1930 /* 1931 * Locate the node for sender, track state, and then pass the 1932 * (referenced) node up to the 802.11 layer for its use. Note 1933 * we can return NULL if the sender is not in the table. 1934 */ 1935 struct ieee80211_node * 1936 _ieee80211_find_rxnode(struct ieee80211com *ic, 1937 const struct ieee80211_frame_min *wh, 1938 const char *func __debrefcnt_used, int line __debrefcnt_used) 1939 { 1940 struct ieee80211_node_table *nt; 1941 struct ieee80211_node *ni; 1942 1943 nt = &ic->ic_sta; 1944 IEEE80211_NODE_LOCK(nt); 1945 ni = _find_rxnode(nt, wh, func, line); 1946 IEEE80211_NODE_UNLOCK(nt); 1947 1948 return ni; 1949 } 1950 1951 /* 1952 * Like ieee80211_find_rxnode but use the supplied h/w 1953 * key index as a hint to locate the node in the key 1954 * mapping table. If an entry is present at the key 1955 * index we return it; otherwise do a normal lookup and 1956 * update the mapping table if the station has a unicast 1957 * key assigned to it. 1958 */ 1959 struct ieee80211_node * 1960 _ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1961 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1962 const char *func __debrefcnt_used, int line __debrefcnt_used) 1963 { 1964 struct ieee80211_node_table *nt; 1965 struct ieee80211_node *ni; 1966 1967 nt = &ic->ic_sta; 1968 IEEE80211_NODE_LOCK(nt); 1969 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1970 ni = nt->nt_keyixmap[keyix]; 1971 else 1972 ni = NULL; 1973 if (ni == NULL) { 1974 ni = _find_rxnode(nt, wh, func, line); 1975 if (ni != NULL && nt->nt_keyixmap != NULL) { 1976 /* 1977 * If the station has a unicast key cache slot 1978 * assigned update the key->node mapping table. 1979 */ 1980 keyix = ni->ni_ucastkey.wk_rxkeyix; 1981 /* XXX can keyixmap[keyix] != NULL? */ 1982 if (keyix < nt->nt_keyixmax && 1983 nt->nt_keyixmap[keyix] == NULL) { 1984 IEEE80211_DPRINTF(ni->ni_vap, 1985 IEEE80211_MSG_NODE, 1986 "%s: add key map entry %p<%s> refcnt %d\n", 1987 __func__, ni, ether_sprintf(ni->ni_macaddr), 1988 ieee80211_node_refcnt(ni)+1); 1989 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1990 } 1991 } 1992 } else { 1993 if (IS_BCAST_PROBEREQ(wh)) 1994 ni = NULL; /* spam bcast probe req to all vap's */ 1995 else 1996 ieee80211_ref_node(ni); 1997 } 1998 IEEE80211_NODE_UNLOCK(nt); 1999 2000 return ni; 2001 } 2002 #undef IS_BCAST_PROBEREQ 2003 #undef IS_PROBEREQ 2004 2005 /* 2006 * Return a reference to the appropriate node for sending 2007 * a data frame. This handles node discovery in adhoc networks. 2008 */ 2009 struct ieee80211_node * 2010 _ieee80211_find_txnode(struct ieee80211vap *vap, 2011 const uint8_t macaddr[IEEE80211_ADDR_LEN], 2012 const char *func __debrefcnt_used, int line __debrefcnt_used) 2013 { 2014 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 2015 struct ieee80211_node *ni; 2016 2017 /* 2018 * The destination address should be in the node table 2019 * unless this is a multicast/broadcast frame. We can 2020 * also optimize station mode operation, all frames go 2021 * to the bss node. 2022 */ 2023 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 2024 IEEE80211_NODE_LOCK(nt); 2025 if (vap->iv_opmode == IEEE80211_M_STA || 2026 vap->iv_opmode == IEEE80211_M_WDS || 2027 IEEE80211_IS_MULTICAST(macaddr)) 2028 ni = ieee80211_ref_node(vap->iv_bss); 2029 else 2030 ni = _ieee80211_find_node_locked(nt, macaddr, func, line); 2031 IEEE80211_NODE_UNLOCK(nt); 2032 2033 if (ni == NULL) { 2034 if (vap->iv_opmode == IEEE80211_M_IBSS || 2035 vap->iv_opmode == IEEE80211_M_AHDEMO) { 2036 /* 2037 * In adhoc mode cons up a node for the destination. 2038 * Note that we need an additional reference for the 2039 * caller to be consistent with 2040 * ieee80211_find_node_locked. 2041 */ 2042 /* 2043 * XXX TODO: this doesn't fake up 11n state; we need 2044 * to find another way to get it upgraded. 2045 */ 2046 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 2047 if (ni != NULL) 2048 (void) ieee80211_ref_node(ni); 2049 } else { 2050 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 2051 "no node, discard frame (%s)", __func__); 2052 vap->iv_stats.is_tx_nonode++; 2053 } 2054 } 2055 return ni; 2056 } 2057 2058 static void 2059 __ieee80211_free_node(struct ieee80211_node *ni) 2060 { 2061 struct ieee80211_node_table *nt = ni->ni_table; 2062 2063 /* 2064 * NB: careful about referencing the vap as it may be 2065 * gone if the last reference was held by a driver. 2066 * We know the com will always be present so it's safe 2067 * to use ni_ic below to reclaim resources. 2068 */ 2069 #if 0 2070 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2071 "%s %p<%s> in %s table\n", __func__, ni, 2072 ether_sprintf(ni->ni_macaddr), 2073 nt != NULL ? nt->nt_name : "<gone>"); 2074 #endif 2075 if (ni->ni_associd != 0) { 2076 struct ieee80211vap *vap = ni->ni_vap; 2077 if (vap->iv_aid_bitmap != NULL) 2078 IEEE80211_AID_CLR(vap, ni->ni_associd); 2079 } 2080 if (nt != NULL) 2081 ieee80211_del_node_nt(nt, ni); 2082 ni->ni_ic->ic_node_free(ni); 2083 } 2084 2085 /* 2086 * Clear any entry in the unicast key mapping table. 2087 */ 2088 static int 2089 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2090 { 2091 ieee80211_keyix keyix; 2092 2093 keyix = ni->ni_ucastkey.wk_rxkeyix; 2094 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 2095 nt->nt_keyixmap[keyix] == ni) { 2096 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2097 "%s: %p<%s> clear key map entry %u\n", 2098 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 2099 nt->nt_keyixmap[keyix] = NULL; 2100 ieee80211_node_decref(ni); 2101 return 1; 2102 } 2103 2104 return 0; 2105 } 2106 2107 void 2108 _ieee80211_free_node(struct ieee80211_node *ni, 2109 const char *func __debrefcnt_used, int line __debrefcnt_used) 2110 { 2111 struct ieee80211_node_table *nt = ni->ni_table; 2112 2113 #ifdef IEEE80211_DEBUG_REFCNT 2114 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2115 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 2116 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 2117 #endif 2118 if (nt != NULL) { 2119 IEEE80211_NODE_LOCK(nt); 2120 if (ieee80211_node_dectestref(ni)) { 2121 /* 2122 * Last reference, reclaim state. 2123 */ 2124 __ieee80211_free_node(ni); 2125 } else if (ieee80211_node_refcnt(ni) == 1) 2126 if (node_clear_keyixmap(nt, ni)) 2127 __ieee80211_free_node(ni); 2128 IEEE80211_NODE_UNLOCK(nt); 2129 } else { 2130 if (ieee80211_node_dectestref(ni)) 2131 __ieee80211_free_node(ni); 2132 } 2133 } 2134 2135 /* 2136 * Reclaim a unicast key and clear any key cache state. 2137 */ 2138 int 2139 ieee80211_node_delucastkey(struct ieee80211_node *ni) 2140 { 2141 struct ieee80211com *ic = ni->ni_ic; 2142 struct ieee80211_node_table *nt = &ic->ic_sta; 2143 struct ieee80211_node *nikey; 2144 ieee80211_keyix keyix; 2145 int isowned, status; 2146 2147 /* 2148 * NB: We must beware of LOR here; deleting the key 2149 * can cause the crypto layer to block traffic updates 2150 * which can generate a LOR against the node table lock; 2151 * grab it here and stash the key index for our use below. 2152 * 2153 * Must also beware of recursion on the node table lock. 2154 * When called from node_cleanup we may already have 2155 * the node table lock held. Unfortunately there's no 2156 * way to separate out this path so we must do this 2157 * conditionally. 2158 */ 2159 isowned = IEEE80211_NODE_IS_LOCKED(nt); 2160 if (!isowned) 2161 IEEE80211_NODE_LOCK(nt); 2162 nikey = NULL; 2163 status = 1; /* NB: success */ 2164 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 2165 keyix = ni->ni_ucastkey.wk_rxkeyix; 2166 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 2167 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 2168 nikey = nt->nt_keyixmap[keyix]; 2169 nt->nt_keyixmap[keyix] = NULL; 2170 } 2171 } 2172 if (!isowned) 2173 IEEE80211_NODE_UNLOCK(nt); 2174 2175 if (nikey != NULL) { 2176 KASSERT(nikey == ni, 2177 ("key map out of sync, ni %p nikey %p", ni, nikey)); 2178 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2179 "%s: delete key map entry %p<%s> refcnt %d\n", 2180 __func__, ni, ether_sprintf(ni->ni_macaddr), 2181 ieee80211_node_refcnt(ni)-1); 2182 ieee80211_free_node(ni); 2183 } 2184 return status; 2185 } 2186 2187 /* 2188 * Reclaim a node. If this is the last reference count then 2189 * do the normal free work. Otherwise remove it from the node 2190 * table and mark it gone by clearing the back-reference. 2191 */ 2192 static void 2193 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2194 { 2195 2196 IEEE80211_NODE_LOCK_ASSERT(nt); 2197 2198 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2199 "%s: remove %p<%s> from %s table, refcnt %d\n", 2200 __func__, ni, ether_sprintf(ni->ni_macaddr), 2201 nt->nt_name, ieee80211_node_refcnt(ni)-1); 2202 /* 2203 * Clear any entry in the unicast key mapping table. 2204 * We need to do it here so rx lookups don't find it 2205 * in the mapping table even if it's not in the hash 2206 * table. We cannot depend on the mapping table entry 2207 * being cleared because the node may not be free'd. 2208 */ 2209 (void)node_clear_keyixmap(nt, ni); 2210 if (!ieee80211_node_dectestref(ni)) { 2211 /* 2212 * Other references are present, just remove the 2213 * node from the table so it cannot be found. When 2214 * the references are dropped storage will be 2215 * reclaimed. 2216 */ 2217 ieee80211_del_node_nt(nt, ni); 2218 } else 2219 __ieee80211_free_node(ni); 2220 } 2221 2222 /* 2223 * Node table support. 2224 */ 2225 2226 static void 2227 ieee80211_node_table_init(struct ieee80211com *ic, 2228 struct ieee80211_node_table *nt, 2229 const char *name, int inact, int keyixmax) 2230 { 2231 2232 nt->nt_ic = ic; 2233 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 2234 TAILQ_INIT(&nt->nt_node); 2235 nt->nt_count = 0; 2236 nt->nt_name = name; 2237 nt->nt_inact_init = inact; 2238 nt->nt_keyixmax = keyixmax; 2239 if (nt->nt_keyixmax > 0) { 2240 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 2241 keyixmax * sizeof(struct ieee80211_node *), 2242 M_80211_NODE, 2243 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2244 if (nt->nt_keyixmap == NULL) 2245 ic_printf(ic, 2246 "Cannot allocate key index map with %u entries\n", 2247 keyixmax); 2248 } else 2249 nt->nt_keyixmap = NULL; 2250 } 2251 2252 static void 2253 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 2254 struct ieee80211vap *match) 2255 { 2256 struct ieee80211_node *ni, *next; 2257 2258 IEEE80211_NODE_LOCK(nt); 2259 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 2260 if (match != NULL && ni->ni_vap != match) 2261 continue; 2262 /* XXX can this happen? if so need's work */ 2263 if (ni->ni_associd != 0) { 2264 struct ieee80211vap *vap = ni->ni_vap; 2265 2266 if (vap->iv_auth->ia_node_leave != NULL) 2267 vap->iv_auth->ia_node_leave(ni); 2268 if (vap->iv_aid_bitmap != NULL) 2269 IEEE80211_AID_CLR(vap, ni->ni_associd); 2270 } 2271 ni->ni_wdsvap = NULL; /* clear reference */ 2272 node_reclaim(nt, ni); 2273 } 2274 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 2275 /* 2276 * Make a separate pass to clear references to this vap 2277 * held by DWDS entries. They will not be matched above 2278 * because ni_vap will point to the ap vap but we still 2279 * need to clear ni_wdsvap when the WDS vap is destroyed 2280 * and/or reset. 2281 */ 2282 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 2283 if (ni->ni_wdsvap == match) 2284 ni->ni_wdsvap = NULL; 2285 } 2286 IEEE80211_NODE_UNLOCK(nt); 2287 } 2288 2289 static void 2290 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2291 { 2292 ieee80211_node_table_reset(nt, NULL); 2293 if (nt->nt_keyixmap != NULL) { 2294 #ifdef DIAGNOSTIC 2295 /* XXX verify all entries are NULL */ 2296 int i; 2297 for (i = 0; i < nt->nt_keyixmax; i++) 2298 if (nt->nt_keyixmap[i] != NULL) 2299 printf("%s: %s[%u] still active\n", __func__, 2300 nt->nt_name, i); 2301 #endif 2302 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 2303 nt->nt_keyixmap = NULL; 2304 } 2305 IEEE80211_NODE_LOCK_DESTROY(nt); 2306 } 2307 2308 static void 2309 timeout_stations(void *arg __unused, struct ieee80211_node *ni) 2310 { 2311 struct ieee80211com *ic = ni->ni_ic; 2312 struct ieee80211vap *vap = ni->ni_vap; 2313 2314 /* 2315 * Only process stations when in RUN state. This 2316 * insures, for example, that we don't timeout an 2317 * inactive station during CAC. Note that CSA state 2318 * is actually handled in ieee80211_node_timeout as 2319 * it applies to more than timeout processing. 2320 */ 2321 if (vap->iv_state != IEEE80211_S_RUN) 2322 return; 2323 /* 2324 * Ignore entries for which have yet to receive an 2325 * authentication frame. These are transient and 2326 * will be reclaimed when the last reference to them 2327 * goes away (when frame xmits complete). 2328 */ 2329 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2330 vap->iv_opmode == IEEE80211_M_STA) && 2331 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2332 return; 2333 /* 2334 * Free fragment if not needed anymore 2335 * (last fragment older than 1s). 2336 * XXX doesn't belong here, move to node_age 2337 */ 2338 if (ni->ni_rxfrag[0] != NULL && 2339 ticks > ni->ni_rxfragstamp + hz) { 2340 m_freem(ni->ni_rxfrag[0]); 2341 ni->ni_rxfrag[0] = NULL; 2342 } 2343 if (ni->ni_inact > 0) { 2344 ni->ni_inact--; 2345 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2346 "%s: inact %u inact_reload %u nrates %u", 2347 __func__, ni->ni_inact, ni->ni_inact_reload, 2348 ni->ni_rates.rs_nrates); 2349 } 2350 /* 2351 * Special case ourself; we may be idle for extended periods 2352 * of time and regardless reclaiming our state is wrong. 2353 * XXX run ic_node_age 2354 */ 2355 /* XXX before inact decrement? */ 2356 if (ni == vap->iv_bss) 2357 return; 2358 if (ni->ni_associd != 0 || 2359 (vap->iv_opmode == IEEE80211_M_IBSS || 2360 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2361 /* 2362 * Age/drain resources held by the station. 2363 */ 2364 ic->ic_node_age(ni); 2365 /* 2366 * Probe the station before time it out. We 2367 * send a null data frame which may not be 2368 * universally supported by drivers (need it 2369 * for ps-poll support so it should be...). 2370 * 2371 * XXX don't probe the station unless we've 2372 * received a frame from them (and have 2373 * some idea of the rates they are capable 2374 * of); this will get fixed more properly 2375 * soon with better handling of the rate set. 2376 */ 2377 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2378 (0 < ni->ni_inact && 2379 ni->ni_inact <= vap->iv_inact_probe) && 2380 ni->ni_rates.rs_nrates != 0) { 2381 IEEE80211_NOTE(vap, 2382 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2383 ni, "%s", 2384 "probe station due to inactivity"); 2385 /* 2386 * Grab a reference so the node cannot 2387 * be reclaimed before we send the frame. 2388 * ieee80211_send_nulldata understands 2389 * we've done this and reclaims the 2390 * ref for us as needed. 2391 */ 2392 /* XXX fix this (not required anymore). */ 2393 ieee80211_ref_node(ni); 2394 /* XXX useless */ 2395 ieee80211_send_nulldata(ni); 2396 /* XXX stat? */ 2397 return; 2398 } 2399 } 2400 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2401 ni->ni_inact <= 0) { 2402 IEEE80211_NOTE(vap, 2403 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2404 "station timed out due to inactivity " 2405 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2406 /* 2407 * Send a deauthenticate frame and drop the station. 2408 * This is somewhat complicated due to reference counts 2409 * and locking. At this point a station will typically 2410 * have a reference count of 2. ieee80211_node_leave 2411 * will do a "free" of the node which will drop the 2412 * reference count. But in the meantime a reference 2413 * wil be held by the deauth frame. The actual reclaim 2414 * of the node will happen either after the tx is 2415 * completed or by ieee80211_node_leave. 2416 */ 2417 if (ni->ni_associd != 0) { 2418 IEEE80211_SEND_MGMT(ni, 2419 IEEE80211_FC0_SUBTYPE_DEAUTH, 2420 IEEE80211_REASON_AUTH_EXPIRE); 2421 } 2422 ieee80211_node_leave(ni); 2423 vap->iv_stats.is_node_timeout++; 2424 } 2425 } 2426 2427 /* 2428 * Timeout inactive stations and do related housekeeping. 2429 */ 2430 static void 2431 ieee80211_timeout_stations(struct ieee80211com *ic) 2432 { 2433 struct ieee80211_node_table *nt = &ic->ic_sta; 2434 2435 ieee80211_iterate_nodes(nt, timeout_stations, NULL); 2436 } 2437 2438 /* 2439 * Aggressively reclaim resources. This should be used 2440 * only in a critical situation to reclaim mbuf resources. 2441 */ 2442 void 2443 ieee80211_drain(struct ieee80211com *ic) 2444 { 2445 struct ieee80211_node_table *nt = &ic->ic_sta; 2446 struct ieee80211vap *vap; 2447 struct ieee80211_node *ni; 2448 2449 IEEE80211_NODE_LOCK(nt); 2450 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2451 /* 2452 * Ignore entries for which have yet to receive an 2453 * authentication frame. These are transient and 2454 * will be reclaimed when the last reference to them 2455 * goes away (when frame xmits complete). 2456 */ 2457 vap = ni->ni_vap; 2458 /* 2459 * Only process stations when in RUN state. This 2460 * insures, for example, that we don't timeout an 2461 * inactive station during CAC. Note that CSA state 2462 * is actually handled in ieee80211_node_timeout as 2463 * it applies to more than timeout processing. 2464 */ 2465 if (vap->iv_state != IEEE80211_S_RUN) 2466 continue; 2467 /* XXX can vap be NULL? */ 2468 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2469 vap->iv_opmode == IEEE80211_M_STA) && 2470 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2471 continue; 2472 /* 2473 * Free fragments. 2474 * XXX doesn't belong here, move to node_drain 2475 */ 2476 if (ni->ni_rxfrag[0] != NULL) { 2477 m_freem(ni->ni_rxfrag[0]); 2478 ni->ni_rxfrag[0] = NULL; 2479 } 2480 /* 2481 * Drain resources held by the station. 2482 */ 2483 ic->ic_node_drain(ni); 2484 } 2485 IEEE80211_NODE_UNLOCK(nt); 2486 } 2487 2488 /* 2489 * Per-ieee80211vap inactivity timer callback. 2490 */ 2491 static void 2492 ieee80211_vap_timeout(struct ieee80211vap *vap) 2493 { 2494 2495 IEEE80211_LOCK_ASSERT(vap->iv_ic); 2496 2497 ieee80211_vap_erp_timeout(vap); 2498 ieee80211_ht_timeout(vap); 2499 ieee80211_vht_timeout(vap); 2500 } 2501 2502 /* 2503 * Per-ieee80211com inactivity timer callback. 2504 */ 2505 void 2506 ieee80211_node_timeout(void *arg) 2507 { 2508 struct ieee80211com *ic = arg; 2509 struct ieee80211vap *vap; 2510 2511 /* 2512 * Defer timeout processing if a channel switch is pending. 2513 * We typically need to be mute so not doing things that 2514 * might generate frames is good to handle in one place. 2515 * Suppressing the station timeout processing may extend the 2516 * lifetime of inactive stations (by not decrementing their 2517 * idle counters) but this should be ok unless the CSA is 2518 * active for an unusually long time. 2519 */ 2520 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2521 ieee80211_scan_timeout(ic); 2522 ieee80211_timeout_stations(ic); 2523 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2524 2525 IEEE80211_LOCK(ic); 2526 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2527 ieee80211_vap_timeout(vap); 2528 IEEE80211_UNLOCK(ic); 2529 } 2530 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2531 ieee80211_node_timeout, ic); 2532 } 2533 2534 /* 2535 * The same as ieee80211_iterate_nodes(), but for one vap only. 2536 */ 2537 int 2538 ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt, 2539 struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg) 2540 { 2541 struct ieee80211_node **ni_arr; 2542 struct ieee80211_node *ni; 2543 size_t size; 2544 int count, i; 2545 2546 /* 2547 * Iterate over the node table and save an array of ref'ed nodes. 2548 * 2549 * This is separated out from calling the actual node function so that 2550 * no LORs will occur. 2551 */ 2552 IEEE80211_NODE_LOCK(nt); 2553 count = nt->nt_count; 2554 size = count * sizeof(struct ieee80211_node *); 2555 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2556 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2557 if (ni_arr == NULL) { 2558 IEEE80211_NODE_UNLOCK(nt); 2559 return (ENOMEM); 2560 } 2561 2562 i = 0; 2563 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2564 if (vap != NULL && ni->ni_vap != vap) 2565 continue; 2566 KASSERT(i < count, 2567 ("node array overflow (vap %p, i %d, count %d)\n", 2568 vap, i, count)); 2569 ni_arr[i] = ieee80211_ref_node(ni); 2570 i++; 2571 } 2572 IEEE80211_NODE_UNLOCK(nt); 2573 2574 for (i = 0; i < count; i++) { 2575 if (ni_arr[i] == NULL) /* end of the list */ 2576 break; 2577 (*f)(arg, ni_arr[i]); 2578 /* ieee80211_free_node() locks by itself */ 2579 ieee80211_free_node(ni_arr[i]); 2580 } 2581 2582 IEEE80211_FREE(ni_arr, M_80211_NODE); 2583 2584 return (0); 2585 } 2586 2587 /* 2588 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2589 * reference in the source. 2590 */ 2591 void 2592 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2593 ieee80211_iter_func *f, void *arg) 2594 { 2595 /* XXX no way to pass error to the caller. */ 2596 (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg); 2597 } 2598 2599 void 2600 ieee80211_dump_node(struct ieee80211_node_table *nt __unused, 2601 struct ieee80211_node *ni) 2602 { 2603 printf("%p: mac %s refcnt %d\n", ni, 2604 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2605 printf("\tauthmode %u flags 0x%x\n", 2606 ni->ni_authmode, ni->ni_flags); 2607 printf("\tassocid 0x%x txpower %u vlan %u\n", 2608 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2609 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2610 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2611 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2612 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2613 ni->ni_rxfragstamp); 2614 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2615 node_getrssi(ni), ni->ni_noise, 2616 ni->ni_intval, ni->ni_capinfo); 2617 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2618 ether_sprintf(ni->ni_bssid), 2619 ni->ni_esslen, ni->ni_essid, 2620 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2621 printf("\tinact %u inact_reload %u txrate %u\n", 2622 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2623 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2624 ni->ni_htcap, ni->ni_htparam, 2625 ni->ni_htctlchan, ni->ni_ht2ndchan); 2626 printf("\thtopmode %x htstbc %x htchw %u\n", 2627 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2628 printf("\tvhtcap %x freq1 %d freq2 %d vhtbasicmcs %x\n", 2629 ni->ni_vhtcap, (int) ni->ni_vht_chan1, (int) ni->ni_vht_chan2, 2630 (int) ni->ni_vht_basicmcs); 2631 /* XXX VHT state */ 2632 } 2633 2634 void 2635 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2636 { 2637 ieee80211_iterate_nodes(nt, 2638 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2639 } 2640 2641 /* 2642 * Iterate over the VAPs and update their ERP beacon IEs. 2643 * 2644 * Note this must be called from the deferred ERP update task paths. 2645 */ 2646 void 2647 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2648 { 2649 struct ieee80211vap *vap; 2650 2651 IEEE80211_LOCK_ASSERT(ic); 2652 2653 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2654 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2655 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2656 } 2657 2658 /* 2659 * Handle a station joining an 11g network. 2660 */ 2661 static void 2662 ieee80211_node_join_11g(struct ieee80211_node *ni) 2663 { 2664 struct ieee80211com *ic = ni->ni_ic; 2665 struct ieee80211vap *vap = ni->ni_vap; 2666 2667 IEEE80211_LOCK_ASSERT(ic); 2668 2669 /* 2670 * Station isn't capable of short slot time. Bump 2671 * the count of long slot time stations and disable 2672 * use of short slot time. Note that the actual switch 2673 * over to long slot time use may not occur until the 2674 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2675 */ 2676 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2677 vap->iv_longslotsta++; 2678 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2679 "station needs long slot time, count %d", 2680 vap->iv_longslotsta); 2681 /* 2682 * XXX TODO: this may need all VAPs checked! 2683 */ 2684 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2685 /* 2686 * Don't force slot time when switched to turbo 2687 * mode as non-ERP stations won't be present; this 2688 * need only be done when on the normal G channel. 2689 */ 2690 ieee80211_vap_set_shortslottime(vap, 0); 2691 } 2692 } 2693 /* 2694 * If the new station is not an ERP station 2695 * then bump the counter and enable protection 2696 * if configured. 2697 */ 2698 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2699 vap->iv_nonerpsta++; 2700 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2701 "station is !ERP, %d non-ERP stations associated", 2702 vap->iv_nonerpsta); 2703 /* 2704 * If station does not support short preamble 2705 * then we must enable use of Barker preamble. 2706 */ 2707 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2708 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2709 "%s", "station needs long preamble"); 2710 vap->iv_flags |= IEEE80211_F_USEBARKER; 2711 vap->iv_flags &= ~IEEE80211_F_SHPREAMBLE; 2712 ieee80211_vap_update_preamble(vap); 2713 } 2714 /* 2715 * If protection is configured and this is the first 2716 * indication we should use protection, enable it. 2717 */ 2718 if (vap->iv_protmode != IEEE80211_PROT_NONE && 2719 vap->iv_nonerpsta == 1 && 2720 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2721 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2722 "%s: enable use of protection\n", __func__); 2723 vap->iv_flags |= IEEE80211_F_USEPROT; 2724 ieee80211_vap_update_erp_protmode(vap); 2725 } 2726 } else 2727 ni->ni_flags |= IEEE80211_NODE_ERP; 2728 } 2729 2730 void 2731 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2732 { 2733 struct ieee80211com *ic = ni->ni_ic; 2734 struct ieee80211vap *vap = ni->ni_vap; 2735 int newassoc; 2736 2737 if (ni->ni_associd == 0) { 2738 uint16_t aid; 2739 2740 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2741 /* 2742 * It would be good to search the bitmap 2743 * more efficiently, but this will do for now. 2744 */ 2745 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2746 if (!IEEE80211_AID_ISSET(vap, aid)) 2747 break; 2748 } 2749 if (aid >= vap->iv_max_aid) { 2750 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2751 ieee80211_node_leave(ni); 2752 return; 2753 } 2754 ni->ni_associd = aid | 0xc000; 2755 ni->ni_jointime = time_uptime; 2756 IEEE80211_LOCK(ic); 2757 IEEE80211_AID_SET(vap, ni->ni_associd); 2758 vap->iv_sta_assoc++; 2759 2760 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2761 ieee80211_ht_node_join(ni); 2762 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2763 ieee80211_vht_node_join(ni); 2764 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2765 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2766 ieee80211_node_join_11g(ni); 2767 IEEE80211_UNLOCK(ic); 2768 2769 newassoc = 1; 2770 } else 2771 newassoc = 0; 2772 2773 /* 2774 * XXX VHT - should log VHT channel width, etc 2775 */ 2776 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2777 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s%s", 2778 IEEE80211_NODE_AID(ni), 2779 vap->iv_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2780 vap->iv_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2781 vap->iv_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2782 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2783 /* XXX update for VHT string */ 2784 ni->ni_flags & IEEE80211_NODE_HT ? 2785 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2786 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2787 ni->ni_flags & IEEE80211_NODE_AMSDU ? " (+AMSDU)" : "", 2788 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2789 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2790 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2791 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2792 ", fast-frames" : "", 2793 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2794 ", turbo" : "" 2795 ); 2796 2797 ieee80211_node_setuptxparms(ni); 2798 ieee80211_ratectl_node_init(ni); 2799 /* give driver a chance to setup state like ni_txrate */ 2800 if (ic->ic_newassoc != NULL) 2801 ic->ic_newassoc(ni, newassoc); 2802 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2803 /* tell the authenticator about new station */ 2804 if (vap->iv_auth->ia_node_join != NULL) 2805 vap->iv_auth->ia_node_join(ni); 2806 ieee80211_notify_node_join(ni, 2807 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2808 } 2809 2810 static void 2811 disable_protection(struct ieee80211vap *vap) 2812 { 2813 struct ieee80211com *ic = vap->iv_ic; 2814 2815 KASSERT(vap->iv_nonerpsta == 0 && 2816 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2817 ("%d non ERP stations, flags 0x%x", vap->iv_nonerpsta, 2818 vap->iv_flags_ext)); 2819 2820 vap->iv_flags &= ~IEEE80211_F_USEPROT; 2821 /* XXX verify mode? */ 2822 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2823 vap->iv_flags |= IEEE80211_F_SHPREAMBLE; 2824 vap->iv_flags &= ~IEEE80211_F_USEBARKER; 2825 } 2826 ieee80211_vap_update_erp_protmode(vap); 2827 ieee80211_vap_update_preamble(vap); 2828 } 2829 2830 /* 2831 * Handle a station leaving an 11g network. 2832 */ 2833 static void 2834 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2835 { 2836 struct ieee80211com *ic = ni->ni_ic; 2837 struct ieee80211vap *vap = ni->ni_vap; 2838 2839 IEEE80211_LOCK_ASSERT(ic); 2840 2841 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2842 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2843 ic->ic_bsschan->ic_flags)); 2844 2845 /* 2846 * If a long slot station do the slot time bookkeeping. 2847 */ 2848 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2849 KASSERT(vap->iv_longslotsta > 0, 2850 ("bogus long slot station count %d", vap->iv_longslotsta)); 2851 vap->iv_longslotsta--; 2852 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2853 "long slot time station leaves, count now %d", 2854 vap->iv_longslotsta); 2855 /* 2856 * XXX TODO: this may need all VAPs checked! 2857 */ 2858 if (vap->iv_longslotsta == 0) { 2859 /* 2860 * Re-enable use of short slot time if supported 2861 * and not operating in IBSS mode (per spec). 2862 */ 2863 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2864 ic->ic_opmode != IEEE80211_M_IBSS) { 2865 IEEE80211_DPRINTF(ni->ni_vap, 2866 IEEE80211_MSG_ASSOC, 2867 "%s: re-enable use of short slot time\n", 2868 __func__); 2869 ieee80211_vap_set_shortslottime(vap, 1); 2870 } 2871 } 2872 } 2873 /* 2874 * If a non-ERP station do the protection-related bookkeeping. 2875 */ 2876 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2877 KASSERT(vap->iv_nonerpsta > 0, 2878 ("bogus non-ERP station count %d", vap->iv_nonerpsta)); 2879 vap->iv_nonerpsta--; 2880 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2881 "non-ERP station leaves, count now %d%s", vap->iv_nonerpsta, 2882 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2883 " (non-ERP sta present)" : ""); 2884 if (vap->iv_nonerpsta == 0 && 2885 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2886 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2887 "%s: disable use of protection\n", __func__); 2888 disable_protection(vap); 2889 } 2890 } 2891 } 2892 2893 /* 2894 * Time out presence of an overlapping bss with non-ERP 2895 * stations. When operating in hostap mode we listen for 2896 * beacons from other stations and if we identify a non-ERP 2897 * station is present we enable protection. To identify 2898 * when all non-ERP stations are gone we time out this 2899 * condition. 2900 */ 2901 static void 2902 ieee80211_vap_erp_timeout(struct ieee80211vap *vap) 2903 { 2904 2905 IEEE80211_LOCK_ASSERT(vap->iv_ic); 2906 2907 if ((vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2908 ieee80211_time_after(ticks, vap->iv_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2909 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 2910 "%s", "age out non-ERP sta present on channel"); 2911 vap->iv_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2912 if (vap->iv_nonerpsta == 0) 2913 disable_protection(vap); 2914 } 2915 } 2916 2917 /* 2918 * Handle bookkeeping for station deauthentication/disassociation 2919 * when operating as an ap. 2920 */ 2921 void 2922 ieee80211_node_leave(struct ieee80211_node *ni) 2923 { 2924 struct ieee80211com *ic = ni->ni_ic; 2925 struct ieee80211vap *vap = ni->ni_vap; 2926 struct ieee80211_node_table *nt = ni->ni_table; 2927 2928 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2929 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2930 2931 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2932 ("unexpected operating mode %u", vap->iv_opmode)); 2933 /* 2934 * If node wasn't previously associated all 2935 * we need to do is reclaim the reference. 2936 */ 2937 /* XXX ibss mode bypasses 11g and notification */ 2938 if (ni->ni_associd == 0) 2939 goto done; 2940 /* 2941 * Tell the authenticator the station is leaving. 2942 * Note that we must do this before yanking the 2943 * association id as the authenticator uses the 2944 * associd to locate it's state block. 2945 */ 2946 if (vap->iv_auth->ia_node_leave != NULL) 2947 vap->iv_auth->ia_node_leave(ni); 2948 2949 IEEE80211_LOCK(ic); 2950 IEEE80211_AID_CLR(vap, ni->ni_associd); 2951 vap->iv_sta_assoc--; 2952 2953 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2954 ieee80211_vht_node_leave(ni); 2955 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2956 ieee80211_ht_node_leave(ni); 2957 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2958 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2959 ieee80211_node_leave_11g(ni); 2960 IEEE80211_UNLOCK(ic); 2961 /* 2962 * Cleanup station state. In particular clear various 2963 * state that might otherwise be reused if the node 2964 * is reused before the reference count goes to zero 2965 * (and memory is reclaimed). 2966 */ 2967 ieee80211_sta_leave(ni); 2968 done: 2969 /* 2970 * Remove the node from any table it's recorded in and 2971 * drop the caller's reference. Removal from the table 2972 * is important to insure the node is not reprocessed 2973 * for inactivity. 2974 */ 2975 if (nt != NULL) { 2976 IEEE80211_NODE_LOCK(nt); 2977 node_reclaim(nt, ni); 2978 IEEE80211_NODE_UNLOCK(nt); 2979 } else 2980 ieee80211_free_node(ni); 2981 } 2982 2983 struct rssiinfo { 2984 int rssi_samples; 2985 uint32_t rssi_total; 2986 }; 2987 2988 static void 2989 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2990 { 2991 struct rssiinfo *info = arg; 2992 struct ieee80211vap *vap = ni->ni_vap; 2993 int8_t rssi; 2994 2995 /* only associated stations */ 2996 if (ni->ni_associd == 0) 2997 return; 2998 rssi = vap->iv_ic->ic_node_getrssi(ni); 2999 if (rssi != 0) { 3000 info->rssi_samples++; 3001 info->rssi_total += rssi; 3002 } 3003 } 3004 3005 static void 3006 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 3007 { 3008 struct rssiinfo *info = arg; 3009 struct ieee80211vap *vap = ni->ni_vap; 3010 int8_t rssi; 3011 3012 /* only neighbors */ 3013 /* XXX check bssid */ 3014 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 3015 return; 3016 rssi = vap->iv_ic->ic_node_getrssi(ni); 3017 if (rssi != 0) { 3018 info->rssi_samples++; 3019 info->rssi_total += rssi; 3020 } 3021 } 3022 3023 #ifdef IEEE80211_SUPPORT_MESH 3024 static void 3025 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 3026 { 3027 struct rssiinfo *info = arg; 3028 struct ieee80211vap *vap = ni->ni_vap; 3029 int8_t rssi; 3030 3031 /* only neighbors that peered successfully */ 3032 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 3033 return; 3034 rssi = vap->iv_ic->ic_node_getrssi(ni); 3035 if (rssi != 0) { 3036 info->rssi_samples++; 3037 info->rssi_total += rssi; 3038 } 3039 } 3040 #endif /* IEEE80211_SUPPORT_MESH */ 3041 3042 int8_t 3043 ieee80211_getrssi(struct ieee80211vap *vap) 3044 { 3045 #define NZ(x) ((x) == 0 ? 1 : (x)) 3046 struct ieee80211com *ic = vap->iv_ic; 3047 struct rssiinfo info; 3048 3049 info.rssi_total = 0; 3050 info.rssi_samples = 0; 3051 switch (vap->iv_opmode) { 3052 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 3053 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 3054 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi, 3055 &info); 3056 break; 3057 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 3058 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi, 3059 &info); 3060 break; 3061 #ifdef IEEE80211_SUPPORT_MESH 3062 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 3063 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi, 3064 &info); 3065 break; 3066 #endif 3067 case IEEE80211_M_MONITOR: /* XXX */ 3068 case IEEE80211_M_STA: /* use stats from associated ap */ 3069 default: 3070 if (vap->iv_bss != NULL) 3071 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 3072 info.rssi_samples = 1; 3073 break; 3074 } 3075 return info.rssi_total / NZ(info.rssi_samples); 3076 #undef NZ 3077 } 3078 3079 void 3080 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 3081 { 3082 3083 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 3084 return; 3085 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 3086 /* for non-station mode return avg'd rssi accounting */ 3087 if (vap->iv_opmode != IEEE80211_M_STA) 3088 *rssi = ieee80211_getrssi(vap); 3089 } 3090