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 /* 63 * IEEE80211_NODE_HASHSIZE must be a power of 2. 64 */ 65 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 66 67 /* 68 * Association id's are managed with a bit vector. 69 */ 70 #define IEEE80211_AID_SET(_vap, b) \ 71 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 72 (1 << (IEEE80211_AID(b) % 32))) 73 #define IEEE80211_AID_CLR(_vap, b) \ 74 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 75 ~(1 << (IEEE80211_AID(b) % 32))) 76 #define IEEE80211_AID_ISSET(_vap, b) \ 77 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 78 79 static int ieee80211_sta_join1(struct ieee80211_node *); 80 81 static struct ieee80211_node *node_alloc(struct ieee80211vap *, 82 const uint8_t [IEEE80211_ADDR_LEN]); 83 static int node_init(struct ieee80211_node *); 84 static void node_cleanup(struct ieee80211_node *); 85 static void node_free(struct ieee80211_node *); 86 static void node_age(struct ieee80211_node *); 87 static int8_t node_getrssi(const struct ieee80211_node *); 88 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 89 static void node_getmimoinfo(const struct ieee80211_node *, 90 struct ieee80211_mimo_info *); 91 92 static void _ieee80211_free_node(struct ieee80211_node *); 93 94 static void node_reclaim(struct ieee80211_node_table *nt, 95 struct ieee80211_node *ni); 96 static void ieee80211_node_table_init(struct ieee80211com *ic, 97 struct ieee80211_node_table *nt, const char *name, 98 int inact, int keymaxix); 99 static void ieee80211_node_table_reset(struct ieee80211_node_table *, 100 struct ieee80211vap *); 101 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 102 static void ieee80211_vap_erp_timeout(struct ieee80211vap *); 103 104 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 105 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 106 107 void 108 ieee80211_node_attach(struct ieee80211com *ic) 109 { 110 /* XXX really want maxlen enforced per-sta */ 111 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 112 "802.11 staging q"); 113 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 114 IEEE80211_INACT_INIT, ic->ic_max_keyix); 115 callout_init(&ic->ic_inact, 1); 116 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 117 ieee80211_node_timeout, ic); 118 119 ic->ic_node_alloc = node_alloc; 120 ic->ic_node_init = node_init; 121 ic->ic_node_free = node_free; 122 ic->ic_node_cleanup = node_cleanup; 123 ic->ic_node_age = node_age; 124 ic->ic_node_drain = node_age; /* NB: same as age */ 125 ic->ic_node_getrssi = node_getrssi; 126 ic->ic_node_getsignal = node_getsignal; 127 ic->ic_node_getmimoinfo = node_getmimoinfo; 128 129 /* 130 * Set flags to be propagated to all vap's; 131 * these define default behaviour/configuration. 132 */ 133 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 134 } 135 136 void 137 ieee80211_node_detach(struct ieee80211com *ic) 138 { 139 140 callout_drain(&ic->ic_inact); 141 ieee80211_node_table_cleanup(&ic->ic_sta); 142 ieee80211_ageq_drain(&ic->ic_stageq); 143 ieee80211_ageq_cleanup(&ic->ic_stageq); 144 } 145 146 void 147 ieee80211_node_vattach(struct ieee80211vap *vap) 148 { 149 /* NB: driver can override */ 150 vap->iv_max_aid = IEEE80211_AID_DEF; 151 152 /* default station inactivity timer settings */ 153 vap->iv_inact_init = IEEE80211_INACT_INIT; 154 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 155 vap->iv_inact_run = IEEE80211_INACT_RUN; 156 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 157 158 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 159 "%s: init %u auth %u run %u probe %u\n", __func__, 160 vap->iv_inact_init, vap->iv_inact_auth, 161 vap->iv_inact_run, vap->iv_inact_probe); 162 } 163 164 void 165 ieee80211_node_latevattach(struct ieee80211vap *vap) 166 { 167 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 168 /* XXX should we allow max aid to be zero? */ 169 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 170 vap->iv_max_aid = IEEE80211_AID_MIN; 171 if_printf(vap->iv_ifp, 172 "WARNING: max aid too small, changed to %d\n", 173 vap->iv_max_aid); 174 } 175 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( 176 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 177 M_80211_NODE, 178 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 179 if (vap->iv_aid_bitmap == NULL) { 180 /* XXX no way to recover */ 181 printf("%s: no memory for AID bitmap, max aid %d!\n", 182 __func__, vap->iv_max_aid); 183 vap->iv_max_aid = 0; 184 } 185 } 186 187 ieee80211_reset_bss(vap); 188 189 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 190 } 191 192 void 193 ieee80211_node_vdetach(struct ieee80211vap *vap) 194 { 195 struct ieee80211com *ic = vap->iv_ic; 196 197 ieee80211_node_table_reset(&ic->ic_sta, vap); 198 if (vap->iv_bss != NULL) { 199 ieee80211_free_node(vap->iv_bss); 200 vap->iv_bss = NULL; 201 } 202 if (vap->iv_aid_bitmap != NULL) { 203 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); 204 vap->iv_aid_bitmap = NULL; 205 } 206 } 207 208 /* 209 * Port authorize/unauthorize interfaces for use by an authenticator. 210 */ 211 212 void 213 ieee80211_node_authorize(struct ieee80211_node *ni) 214 { 215 struct ieee80211vap *vap = ni->ni_vap; 216 217 ni->ni_flags |= IEEE80211_NODE_AUTH; 218 ni->ni_inact_reload = vap->iv_inact_run; 219 ni->ni_inact = ni->ni_inact_reload; 220 221 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 222 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 223 } 224 225 void 226 ieee80211_node_unauthorize(struct ieee80211_node *ni) 227 { 228 struct ieee80211vap *vap = ni->ni_vap; 229 230 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 231 ni->ni_inact_reload = vap->iv_inact_auth; 232 if (ni->ni_inact > ni->ni_inact_reload) 233 ni->ni_inact = ni->ni_inact_reload; 234 235 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 236 "%s: inact_reload %u inact %u", __func__, 237 ni->ni_inact_reload, ni->ni_inact); 238 } 239 240 /* 241 * Fix tx parameters for a node according to ``association state''. 242 */ 243 void 244 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 245 { 246 struct ieee80211vap *vap = ni->ni_vap; 247 enum ieee80211_phymode mode; 248 249 if (ni->ni_flags & IEEE80211_NODE_VHT) { 250 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 251 mode = IEEE80211_MODE_VHT_5GHZ; 252 else 253 mode = IEEE80211_MODE_VHT_2GHZ; 254 } else if (ni->ni_flags & IEEE80211_NODE_HT) { 255 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 256 mode = IEEE80211_MODE_11NA; 257 else 258 mode = IEEE80211_MODE_11NG; 259 } else { /* legacy rate handling */ 260 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 261 mode = IEEE80211_MODE_STURBO_A; 262 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 263 mode = IEEE80211_MODE_HALF; 264 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 265 mode = IEEE80211_MODE_QUARTER; 266 /* NB: 108A should be handled as 11a */ 267 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 268 mode = IEEE80211_MODE_11A; 269 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 270 (ni->ni_flags & IEEE80211_NODE_ERP)) 271 mode = IEEE80211_MODE_11G; 272 else 273 mode = IEEE80211_MODE_11B; 274 } 275 ni->ni_txparms = &vap->iv_txparms[mode]; 276 } 277 278 /* 279 * Set/change the channel. The rate set is also updated as 280 * to insure a consistent view by drivers. 281 * XXX should be private but hostap needs it to deal with CSA 282 */ 283 void 284 ieee80211_node_set_chan(struct ieee80211_node *ni, 285 struct ieee80211_channel *chan) 286 { 287 struct ieee80211com *ic = ni->ni_ic; 288 struct ieee80211vap *vap = ni->ni_vap; 289 enum ieee80211_phymode mode; 290 291 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 292 293 ni->ni_chan = chan; 294 mode = ieee80211_chan2mode(chan); 295 if (IEEE80211_IS_CHAN_HT(chan)) { 296 /* 297 * We must install the legacy rate est in ni_rates and the 298 * HT rate set in ni_htrates. 299 */ 300 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 301 /* 302 * Setup bss tx parameters based on operating mode. We 303 * use legacy rates when operating in a mixed HT+non-HT bss 304 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 305 */ 306 if (mode == IEEE80211_MODE_11NA && 307 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 308 mode = IEEE80211_MODE_11A; 309 else if (mode == IEEE80211_MODE_11NG && 310 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 311 mode = IEEE80211_MODE_11G; 312 if (mode == IEEE80211_MODE_11G && 313 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 314 mode = IEEE80211_MODE_11B; 315 } 316 ni->ni_txparms = &vap->iv_txparms[mode]; 317 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 318 } 319 320 static __inline void 321 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 322 { 323 /* propagate useful state */ 324 nbss->ni_authmode = obss->ni_authmode; 325 nbss->ni_txpower = obss->ni_txpower; 326 nbss->ni_vlan = obss->ni_vlan; 327 /* XXX statistics? */ 328 /* XXX legacy WDS bssid? */ 329 } 330 331 void 332 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 333 { 334 struct ieee80211com *ic = vap->iv_ic; 335 struct ieee80211_node *ni; 336 337 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 338 "%s: creating %s on channel %u%c flags 0x%08x\n", __func__, 339 ieee80211_opmode_name[vap->iv_opmode], 340 ieee80211_chan2ieee(ic, chan), 341 ieee80211_channel_type_char(chan), 342 chan->ic_flags); 343 344 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 345 if (ni == NULL) { 346 /* XXX recovery? */ 347 return; 348 } 349 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 350 ni->ni_esslen = vap->iv_des_ssid[0].len; 351 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 352 if (vap->iv_bss != NULL) 353 copy_bss(ni, vap->iv_bss); 354 ni->ni_intval = ic->ic_bintval; 355 if (vap->iv_flags & IEEE80211_F_PRIVACY) 356 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 357 if (ic->ic_phytype == IEEE80211_T_FH) { 358 ni->ni_fhdwell = 200; /* XXX */ 359 ni->ni_fhindex = 1; 360 } 361 if (vap->iv_opmode == IEEE80211_M_IBSS) { 362 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 363 if (vap->iv_flags & IEEE80211_F_DESBSSID) 364 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 365 else { 366 net80211_get_random_bytes(ni->ni_bssid, 367 IEEE80211_ADDR_LEN); 368 /* clear group bit, add local bit */ 369 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 370 } 371 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 372 if (vap->iv_flags & IEEE80211_F_DESBSSID) 373 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 374 else 375 #ifdef IEEE80211_SUPPORT_TDMA 376 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 377 #endif 378 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 379 #ifdef IEEE80211_SUPPORT_MESH 380 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 381 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 382 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 383 #endif 384 } 385 /* 386 * Fix the channel and related attributes. 387 */ 388 /* clear DFS CAC state on previous channel */ 389 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 390 ic->ic_bsschan->ic_freq != chan->ic_freq && 391 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 392 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 393 ic->ic_bsschan = chan; 394 ieee80211_node_set_chan(ni, chan); 395 ic->ic_curmode = ieee80211_chan2mode(chan); 396 /* 397 * Do mode-specific setup. 398 */ 399 if (IEEE80211_IS_CHAN_FULL(chan)) { 400 if (IEEE80211_IS_CHAN_ANYG(chan)) { 401 /* 402 * Use a mixed 11b/11g basic rate set. 403 */ 404 ieee80211_setbasicrates(&ni->ni_rates, 405 IEEE80211_MODE_11G); 406 if (vap->iv_flags & IEEE80211_F_PUREG) { 407 /* 408 * Also mark OFDM rates basic so 11b 409 * stations do not join (WiFi compliance). 410 */ 411 ieee80211_addbasicrates(&ni->ni_rates, 412 IEEE80211_MODE_11A); 413 } 414 } else if (IEEE80211_IS_CHAN_B(chan)) { 415 /* 416 * Force pure 11b rate set. 417 */ 418 ieee80211_setbasicrates(&ni->ni_rates, 419 IEEE80211_MODE_11B); 420 } 421 } 422 423 /* XXX TODO: other bits and pieces - eg fast-frames? */ 424 425 /* If we're an 11n channel then initialise the 11n bits */ 426 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { 427 /* XXX what else? */ 428 ieee80211_ht_node_init(ni); 429 ieee80211_vht_node_init(ni); 430 } else if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 431 /* XXX what else? */ 432 ieee80211_ht_node_init(ni); 433 } 434 435 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 436 } 437 438 /* 439 * Reset bss state on transition to the INIT state. 440 * Clear any stations from the table (they have been 441 * deauth'd) and reset the bss node (clears key, rate 442 * etc. state). 443 */ 444 void 445 ieee80211_reset_bss(struct ieee80211vap *vap) 446 { 447 struct ieee80211com *ic = vap->iv_ic; 448 struct ieee80211_node *ni, *obss; 449 450 ieee80211_node_table_reset(&ic->ic_sta, vap); 451 /* XXX multi-bss: wrong */ 452 ieee80211_vap_reset_erp(vap); 453 454 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 455 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 456 obss = vap->iv_bss; 457 vap->iv_bss = ieee80211_ref_node(ni); 458 if (obss != NULL) { 459 copy_bss(ni, obss); 460 ni->ni_intval = ic->ic_bintval; 461 ieee80211_free_node(obss); 462 } else 463 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 464 } 465 466 static int 467 match_ssid(const struct ieee80211_node *ni, 468 int nssid, const struct ieee80211_scan_ssid ssids[]) 469 { 470 int i; 471 472 for (i = 0; i < nssid; i++) { 473 if (ni->ni_esslen == ssids[i].len && 474 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 475 return 1; 476 } 477 return 0; 478 } 479 480 /* 481 * Test a node for suitability/compatibility. 482 */ 483 static int 484 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 485 { 486 struct ieee80211com *ic = ni->ni_ic; 487 uint8_t rate; 488 489 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 490 return 0; 491 if (vap->iv_opmode == IEEE80211_M_IBSS) { 492 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 493 return 0; 494 } else { 495 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 496 return 0; 497 } 498 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 499 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 500 return 0; 501 } else { 502 /* XXX does this mean privacy is supported or required? */ 503 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 504 return 0; 505 } 506 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 507 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 508 if (rate & IEEE80211_RATE_BASIC) 509 return 0; 510 if (vap->iv_des_nssid != 0 && 511 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 512 return 0; 513 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 514 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 515 return 0; 516 return 1; 517 } 518 519 #ifdef IEEE80211_DEBUG 520 /* 521 * Display node suitability/compatibility. 522 */ 523 static void 524 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 525 { 526 struct ieee80211com *ic = ni->ni_ic; 527 uint8_t rate; 528 int fail; 529 530 fail = 0; 531 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 532 fail |= 0x01; 533 if (vap->iv_opmode == IEEE80211_M_IBSS) { 534 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 535 fail |= 0x02; 536 } else { 537 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 538 fail |= 0x02; 539 } 540 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 541 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 542 fail |= 0x04; 543 } else { 544 /* XXX does this mean privacy is supported or required? */ 545 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 546 fail |= 0x04; 547 } 548 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 549 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 550 if (rate & IEEE80211_RATE_BASIC) 551 fail |= 0x08; 552 if (vap->iv_des_nssid != 0 && 553 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 554 fail |= 0x10; 555 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 556 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 557 fail |= 0x20; 558 559 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 560 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 561 printf(" %3d%c", 562 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 563 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 564 fail & 0x08 ? '!' : ' '); 565 printf(" %4s%c", 566 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 567 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 568 "????", 569 fail & 0x02 ? '!' : ' '); 570 printf(" %3s%c ", 571 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 572 fail & 0x04 ? '!' : ' '); 573 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 574 printf("%s\n", fail & 0x10 ? "!" : ""); 575 } 576 #endif /* IEEE80211_DEBUG */ 577 578 int 579 ieee80211_ibss_merge_check(struct ieee80211_node *ni) 580 { 581 struct ieee80211vap *vap = ni->ni_vap; 582 583 if (ni == vap->iv_bss || 584 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 585 /* unchanged, nothing to do */ 586 return 0; 587 } 588 589 if (!check_bss(vap, ni)) { 590 /* capabilities mismatch */ 591 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 592 "%s: merge failed, capabilities mismatch\n", __func__); 593 #ifdef IEEE80211_DEBUG 594 if (ieee80211_msg_assoc(vap)) 595 check_bss_debug(vap, ni); 596 #endif 597 vap->iv_stats.is_ibss_capmismatch++; 598 return 0; 599 } 600 601 return 1; 602 } 603 604 /* 605 * Check if the given node should populate the node table. 606 * 607 * We need to be in "see all beacons for all ssids" mode in order 608 * to do IBSS merges, however this means we will populate nodes for 609 * /all/ IBSS SSIDs, versus just the one we care about. 610 * 611 * So this check ensures the node can actually belong to our IBSS 612 * configuration. For now it simply checks the SSID. 613 */ 614 int 615 ieee80211_ibss_node_check_new(struct ieee80211_node *ni, 616 const struct ieee80211_scanparams *scan) 617 { 618 struct ieee80211vap *vap = ni->ni_vap; 619 int i; 620 621 /* 622 * If we have no SSID and no scan SSID, return OK. 623 */ 624 if (vap->iv_des_nssid == 0 && scan->ssid == NULL) 625 goto ok; 626 627 /* 628 * If we have one of (SSID, scan SSID) then return error. 629 */ 630 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL)) 631 goto mismatch; 632 633 /* 634 * Double-check - we need scan SSID. 635 */ 636 if (scan->ssid == NULL) 637 goto mismatch; 638 639 /* 640 * Check if the scan SSID matches the SSID list for the VAP. 641 */ 642 for (i = 0; i < vap->iv_des_nssid; i++) { 643 /* Sanity length check */ 644 if (vap->iv_des_ssid[i].len != scan->ssid[1]) 645 continue; 646 647 /* Note: SSID in the scan entry is the IE format */ 648 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2, 649 vap->iv_des_ssid[i].len) == 0) 650 goto ok; 651 } 652 653 mismatch: 654 return (0); 655 ok: 656 return (1); 657 } 658 659 /* 660 * Handle 802.11 ad hoc network merge. The 661 * convention, set by the Wireless Ethernet Compatibility Alliance 662 * (WECA), is that an 802.11 station will change its BSSID to match 663 * the "oldest" 802.11 ad hoc network, on the same channel, that 664 * has the station's desired SSID. The "oldest" 802.11 network 665 * sends beacons with the greatest TSF timestamp. 666 * 667 * The caller is assumed to validate TSF's before attempting a merge. 668 * 669 * Return !0 if the BSSID changed, 0 otherwise. 670 */ 671 int 672 ieee80211_ibss_merge(struct ieee80211_node *ni) 673 { 674 #ifdef IEEE80211_DEBUG 675 struct ieee80211vap *vap = ni->ni_vap; 676 #endif 677 678 if (! ieee80211_ibss_merge_check(ni)) 679 return 0; 680 681 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 682 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 683 ether_sprintf(ni->ni_bssid), 684 vap->iv_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 685 vap->iv_flags&IEEE80211_F_SHSLOT ? "short" : "long", 686 vap->iv_flags&IEEE80211_F_USEPROT ? ", protection" : "" 687 ); 688 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 689 } 690 691 /* 692 * Calculate HT channel promotion flags for all vaps. 693 * This assumes ni_chan have been setup for each vap. 694 */ 695 static int 696 gethtadjustflags(struct ieee80211com *ic) 697 { 698 struct ieee80211vap *vap; 699 int flags; 700 701 flags = 0; 702 /* XXX locking */ 703 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 704 if (vap->iv_state < IEEE80211_S_RUN) 705 continue; 706 switch (vap->iv_opmode) { 707 case IEEE80211_M_WDS: 708 case IEEE80211_M_STA: 709 case IEEE80211_M_AHDEMO: 710 case IEEE80211_M_HOSTAP: 711 case IEEE80211_M_IBSS: 712 case IEEE80211_M_MBSS: 713 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 714 break; 715 default: 716 break; 717 } 718 } 719 return flags; 720 } 721 722 /* 723 * Calculate VHT channel promotion flags for all vaps. 724 * This assumes ni_chan have been setup for each vap. 725 */ 726 static int 727 getvhtadjustflags(struct ieee80211com *ic) 728 { 729 struct ieee80211vap *vap; 730 int flags; 731 732 flags = 0; 733 /* XXX locking */ 734 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 735 if (vap->iv_state < IEEE80211_S_RUN) 736 continue; 737 switch (vap->iv_opmode) { 738 case IEEE80211_M_WDS: 739 case IEEE80211_M_STA: 740 case IEEE80211_M_AHDEMO: 741 case IEEE80211_M_HOSTAP: 742 case IEEE80211_M_IBSS: 743 case IEEE80211_M_MBSS: 744 flags |= ieee80211_vhtchanflags(vap->iv_bss->ni_chan); 745 break; 746 default: 747 break; 748 } 749 } 750 return flags; 751 } 752 753 /* 754 * Check if the current channel needs to change based on whether 755 * any vap's are using HT20/HT40. This is used to sync the state 756 * of ic_curchan after a channel width change on a running vap. 757 * 758 * Same applies for VHT. 759 */ 760 void 761 ieee80211_sync_curchan(struct ieee80211com *ic) 762 { 763 struct ieee80211_channel *c; 764 765 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 766 c = ieee80211_vht_adjust_channel(ic, c, getvhtadjustflags(ic)); 767 768 if (c != ic->ic_curchan) { 769 ic->ic_curchan = c; 770 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 771 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 772 IEEE80211_UNLOCK(ic); 773 ic->ic_set_channel(ic); 774 ieee80211_radiotap_chan_change(ic); 775 IEEE80211_LOCK(ic); 776 } 777 } 778 779 /* 780 * Setup the current channel. The request channel may be 781 * promoted if other vap's are operating with HT20/HT40. 782 */ 783 void 784 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 785 { 786 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 787 int flags = gethtadjustflags(ic); 788 /* 789 * Check for channel promotion required to support the 790 * set of running vap's. This assumes we are called 791 * after ni_chan is setup for each vap. 792 */ 793 /* XXX VHT? */ 794 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 795 if (flags > ieee80211_htchanflags(c)) 796 c = ieee80211_ht_adjust_channel(ic, c, flags); 797 } 798 799 /* 800 * VHT promotion - this will at least promote to VHT20/40 801 * based on what HT has done; it may further promote the 802 * channel to VHT80 or above. 803 */ 804 if (ic->ic_vhtcaps != 0) { 805 int flags = getvhtadjustflags(ic); 806 if (flags > ieee80211_vhtchanflags(c)) 807 c = ieee80211_vht_adjust_channel(ic, c, flags); 808 } 809 810 ic->ic_bsschan = ic->ic_curchan = c; 811 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 812 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 813 } 814 815 /* 816 * Change the current channel. The channel change is guaranteed to have 817 * happened before the next state change. 818 */ 819 void 820 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 821 { 822 ieee80211_setupcurchan(ic, c); 823 ieee80211_runtask(ic, &ic->ic_chan_task); 824 } 825 826 void 827 ieee80211_update_chw(struct ieee80211com *ic) 828 { 829 830 ieee80211_setupcurchan(ic, ic->ic_curchan); 831 ieee80211_runtask(ic, &ic->ic_chw_task); 832 } 833 834 /* 835 * Join the specified IBSS/BSS network. The node is assumed to 836 * be passed in with a held reference. 837 */ 838 static int 839 ieee80211_sta_join1(struct ieee80211_node *selbs) 840 { 841 struct ieee80211vap *vap = selbs->ni_vap; 842 struct ieee80211com *ic = selbs->ni_ic; 843 struct ieee80211_node *obss; 844 int canreassoc; 845 846 /* 847 * Committed to selbs, setup state. 848 */ 849 obss = vap->iv_bss; 850 /* 851 * Check if old+new node have the same address in which 852 * case we can reassociate when operating in sta mode. 853 */ 854 canreassoc = (obss != NULL && 855 vap->iv_state == IEEE80211_S_RUN && 856 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 857 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 858 if (obss != NULL) { 859 struct ieee80211_node_table *nt = obss->ni_table; 860 861 copy_bss(selbs, obss); 862 ieee80211_node_decref(obss); /* iv_bss reference */ 863 864 IEEE80211_NODE_LOCK(nt); 865 node_reclaim(nt, obss); /* station table reference */ 866 IEEE80211_NODE_UNLOCK(nt); 867 868 obss = NULL; /* NB: guard against later use */ 869 } 870 871 /* 872 * Delete unusable rates; we've already checked 873 * that the negotiated rate set is acceptable. 874 */ 875 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 876 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 877 878 ieee80211_setcurchan(ic, selbs->ni_chan); 879 /* 880 * Set the erp state (mostly the slot time) to deal with 881 * the auto-select case; this should be redundant if the 882 * mode is locked. 883 */ 884 ieee80211_vap_reset_erp(vap); 885 ieee80211_wme_initparams(vap); 886 887 if (vap->iv_opmode == IEEE80211_M_STA) { 888 if (canreassoc) { 889 /* Reassociate */ 890 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 891 } else { 892 /* 893 * Act as if we received a DEAUTH frame in case we 894 * are invoked from the RUN state. This will cause 895 * us to try to re-authenticate if we are operating 896 * as a station. 897 */ 898 ieee80211_new_state(vap, IEEE80211_S_AUTH, 899 IEEE80211_FC0_SUBTYPE_DEAUTH); 900 } 901 } else 902 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 903 return 1; 904 } 905 906 int 907 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 908 const struct ieee80211_scan_entry *se) 909 { 910 struct ieee80211com *ic = vap->iv_ic; 911 struct ieee80211_node *ni; 912 int do_ht = 0; 913 914 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 915 if (ni == NULL) { 916 /* XXX msg */ 917 return 0; 918 } 919 920 /* 921 * Expand scan state into node's format. 922 * XXX may not need all this stuff 923 */ 924 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 925 ni->ni_esslen = se->se_ssid[1]; 926 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 927 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 928 ni->ni_intval = se->se_intval; 929 ni->ni_capinfo = se->se_capinfo; 930 ni->ni_chan = chan; 931 ni->ni_timoff = se->se_timoff; 932 ni->ni_fhdwell = se->se_fhdwell; 933 ni->ni_fhindex = se->se_fhindex; 934 ni->ni_erp = se->se_erp; 935 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 936 ni->ni_noise = se->se_noise; 937 if (vap->iv_opmode == IEEE80211_M_STA) { 938 /* NB: only infrastructure mode requires an associd */ 939 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 940 } 941 942 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 943 ieee80211_ies_expand(&ni->ni_ies); 944 #ifdef IEEE80211_SUPPORT_SUPERG 945 if (ni->ni_ies.ath_ie != NULL) 946 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 947 #endif 948 if (ni->ni_ies.htcap_ie != NULL) 949 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 950 if (ni->ni_ies.htinfo_ie != NULL) 951 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 952 #ifdef IEEE80211_SUPPORT_MESH 953 if (ni->ni_ies.meshid_ie != NULL) 954 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 955 #endif 956 #ifdef IEEE80211_SUPPORT_TDMA 957 if (ni->ni_ies.tdma_ie != NULL) 958 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 959 #endif 960 if (ni->ni_ies.vhtcap_ie != NULL) 961 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 962 if (ni->ni_ies.vhtopmode_ie != NULL) 963 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 964 965 /* XXX parse BSSLOAD IE */ 966 /* XXX parse TXPWRENV IE */ 967 /* XXX parse APCHANREP IE */ 968 } 969 970 vap->iv_dtim_period = se->se_dtimperiod; 971 vap->iv_dtim_count = 0; 972 973 /* NB: must be after ni_chan is setup */ 974 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 975 IEEE80211_F_DOSORT); 976 if (ieee80211_iserp_rateset(&ni->ni_rates)) 977 ni->ni_flags |= IEEE80211_NODE_ERP; 978 979 /* 980 * Setup HT state for this node if it's available, otherwise 981 * non-STA modes won't pick this state up. 982 * 983 * For IBSS and related modes that don't go through an 984 * association request/response, the only appropriate place 985 * to setup the HT state is here. 986 */ 987 if (ni->ni_ies.htinfo_ie != NULL && 988 ni->ni_ies.htcap_ie != NULL && 989 vap->iv_flags_ht & IEEE80211_FHT_HT) { 990 ieee80211_ht_node_init(ni); 991 ieee80211_ht_updateparams(ni, 992 ni->ni_ies.htcap_ie, 993 ni->ni_ies.htinfo_ie); 994 do_ht = 1; 995 } 996 997 /* 998 * Setup VHT state for this node if it's available. 999 * Same as the above. 1000 * 1001 * For now, don't allow 2GHz VHT operation. 1002 */ 1003 if (ni->ni_ies.vhtopmode_ie != NULL && 1004 ni->ni_ies.vhtcap_ie != NULL && 1005 vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1006 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1007 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1008 __func__, 1009 ni->ni_macaddr, 1010 ":"); 1011 } else { 1012 ieee80211_vht_node_init(ni); 1013 ieee80211_vht_updateparams(ni, 1014 ni->ni_ies.vhtcap_ie, 1015 ni->ni_ies.vhtopmode_ie); 1016 ieee80211_setup_vht_rates(ni, ni->ni_ies.vhtcap_ie, 1017 ni->ni_ies.vhtopmode_ie); 1018 do_ht = 1; 1019 } 1020 } 1021 1022 /* Finally do the node channel change */ 1023 if (do_ht) { 1024 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1025 ni->ni_ies.htinfo_ie); 1026 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 1027 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1028 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 1029 } 1030 1031 /* XXX else check for ath FF? */ 1032 /* XXX QoS? Difficult given that WME config is specific to a master */ 1033 1034 ieee80211_node_setuptxparms(ni); 1035 ieee80211_ratectl_node_init(ni); 1036 1037 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 1038 } 1039 1040 /* 1041 * Leave the specified IBSS/BSS network. The node is assumed to 1042 * be passed in with a held reference. 1043 */ 1044 void 1045 ieee80211_sta_leave(struct ieee80211_node *ni) 1046 { 1047 struct ieee80211com *ic = ni->ni_ic; 1048 1049 ic->ic_node_cleanup(ni); 1050 ieee80211_notify_node_leave(ni); 1051 } 1052 1053 /* 1054 * Send a deauthenticate frame and drop the station. 1055 */ 1056 void 1057 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 1058 { 1059 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 1060 ieee80211_ref_node(ni); 1061 if (ni->ni_associd != 0) 1062 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 1063 ieee80211_node_leave(ni); 1064 ieee80211_free_node(ni); 1065 } 1066 1067 static struct ieee80211_node * 1068 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1069 { 1070 struct ieee80211_node *ni; 1071 1072 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), 1073 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1074 return ni; 1075 } 1076 1077 static int 1078 node_init(struct ieee80211_node *ni) 1079 { 1080 return 0; 1081 } 1082 1083 /* 1084 * Initialize an ie blob with the specified data. If previous 1085 * data exists re-use the data block. As a side effect we clear 1086 * all references to specific ie's; the caller is required to 1087 * recalculate them. 1088 */ 1089 int 1090 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 1091 { 1092 /* NB: assumes data+len are the last fields */ 1093 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 1094 if (ies->data != NULL && ies->len != len) { 1095 /* data size changed */ 1096 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1097 ies->data = NULL; 1098 } 1099 if (ies->data == NULL) { 1100 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 1101 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1102 if (ies->data == NULL) { 1103 ies->len = 0; 1104 /* NB: pointers have already been zero'd above */ 1105 return 0; 1106 } 1107 } 1108 memcpy(ies->data, data, len); 1109 ies->len = len; 1110 return 1; 1111 } 1112 1113 /* 1114 * Reclaim storage for an ie blob. 1115 */ 1116 void 1117 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 1118 { 1119 if (ies->data != NULL) 1120 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1121 } 1122 1123 /* 1124 * Expand an ie blob data contents and to fillin individual 1125 * ie pointers. The data blob is assumed to be well-formed; 1126 * we don't do any validity checking of ie lengths. 1127 */ 1128 void 1129 ieee80211_ies_expand(struct ieee80211_ies *ies) 1130 { 1131 uint8_t *ie; 1132 int ielen; 1133 1134 ie = ies->data; 1135 ielen = ies->len; 1136 while (ielen > 1) { 1137 switch (ie[0]) { 1138 case IEEE80211_ELEMID_VENDOR: 1139 if (iswpaoui(ie)) 1140 ies->wpa_ie = ie; 1141 else if (iswmeoui(ie)) 1142 ies->wme_ie = ie; 1143 #ifdef IEEE80211_SUPPORT_SUPERG 1144 else if (isatherosoui(ie)) 1145 ies->ath_ie = ie; 1146 #endif 1147 #ifdef IEEE80211_SUPPORT_TDMA 1148 else if (istdmaoui(ie)) 1149 ies->tdma_ie = ie; 1150 #endif 1151 break; 1152 case IEEE80211_ELEMID_RSN: 1153 ies->rsn_ie = ie; 1154 break; 1155 case IEEE80211_ELEMID_HTCAP: 1156 ies->htcap_ie = ie; 1157 break; 1158 case IEEE80211_ELEMID_HTINFO: 1159 ies->htinfo_ie = ie; 1160 break; 1161 #ifdef IEEE80211_SUPPORT_MESH 1162 case IEEE80211_ELEMID_MESHID: 1163 ies->meshid_ie = ie; 1164 break; 1165 #endif 1166 case IEEE80211_ELEMID_VHT_CAP: 1167 ies->vhtcap_ie = ie; 1168 break; 1169 case IEEE80211_ELEMID_VHT_OPMODE: 1170 ies->vhtopmode_ie = ie; 1171 break; 1172 case IEEE80211_ELEMID_VHT_PWR_ENV: 1173 ies->vhtpwrenv_ie = ie; 1174 break; 1175 case IEEE80211_ELEMID_BSSLOAD: 1176 ies->bssload_ie = ie; 1177 break; 1178 case IEEE80211_ELEMID_APCHANREP: 1179 ies->apchanrep_ie = ie; 1180 break; 1181 } 1182 ielen -= 2 + ie[1]; 1183 ie += 2 + ie[1]; 1184 } 1185 } 1186 1187 /* 1188 * Reclaim any resources in a node and reset any critical 1189 * state. Typically nodes are free'd immediately after, 1190 * but in some cases the storage may be reused so we need 1191 * to insure consistent state (should probably fix that). 1192 */ 1193 static void 1194 node_cleanup(struct ieee80211_node *ni) 1195 { 1196 struct ieee80211vap *vap = ni->ni_vap; 1197 struct ieee80211com *ic = ni->ni_ic; 1198 int i; 1199 1200 /* NB: preserve ni_table */ 1201 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1202 if (vap->iv_opmode != IEEE80211_M_STA) 1203 vap->iv_ps_sta--; 1204 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1205 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1206 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1207 } 1208 /* 1209 * Cleanup any VHT and HT-related state. 1210 */ 1211 if (ni->ni_flags & IEEE80211_NODE_VHT) 1212 ieee80211_vht_node_cleanup(ni); 1213 if (ni->ni_flags & IEEE80211_NODE_HT) 1214 ieee80211_ht_node_cleanup(ni); 1215 #ifdef IEEE80211_SUPPORT_SUPERG 1216 /* Always do FF node cleanup; for A-MSDU */ 1217 ieee80211_ff_node_cleanup(ni); 1218 #endif 1219 #ifdef IEEE80211_SUPPORT_MESH 1220 /* 1221 * Cleanup any mesh-related state. 1222 */ 1223 if (vap->iv_opmode == IEEE80211_M_MBSS) 1224 ieee80211_mesh_node_cleanup(ni); 1225 #endif 1226 /* 1227 * Clear any staging queue entries. 1228 */ 1229 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1230 1231 /* 1232 * Clear AREF flag that marks the authorization refcnt bump 1233 * has happened. This is probably not needed as the node 1234 * should always be removed from the table so not found but 1235 * do it just in case. 1236 * Likewise clear the ASSOCID flag as these flags are intended 1237 * to be managed in tandem. 1238 */ 1239 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1240 1241 /* 1242 * Drain power save queue and, if needed, clear TIM. 1243 */ 1244 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1245 vap->iv_set_tim(ni, 0); 1246 1247 ni->ni_associd = 0; 1248 if (ni->ni_challenge != NULL) { 1249 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1250 ni->ni_challenge = NULL; 1251 } 1252 /* 1253 * Preserve SSID, WPA, and WME ie's so the bss node is 1254 * reusable during a re-auth/re-assoc state transition. 1255 * If we remove these data they will not be recreated 1256 * because they come from a probe-response or beacon frame 1257 * which cannot be expected prior to the association-response. 1258 * This should not be an issue when operating in other modes 1259 * as stations leaving always go through a full state transition 1260 * which will rebuild this state. 1261 * 1262 * XXX does this leave us open to inheriting old state? 1263 */ 1264 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1265 if (ni->ni_rxfrag[i] != NULL) { 1266 m_freem(ni->ni_rxfrag[i]); 1267 ni->ni_rxfrag[i] = NULL; 1268 } 1269 /* 1270 * Must be careful here to remove any key map entry w/o a LOR. 1271 */ 1272 ieee80211_node_delucastkey(ni); 1273 } 1274 1275 static void 1276 node_free(struct ieee80211_node *ni) 1277 { 1278 struct ieee80211com *ic = ni->ni_ic; 1279 1280 ieee80211_ratectl_node_deinit(ni); 1281 ic->ic_node_cleanup(ni); 1282 ieee80211_ies_cleanup(&ni->ni_ies); 1283 ieee80211_psq_cleanup(&ni->ni_psq); 1284 IEEE80211_FREE(ni, M_80211_NODE); 1285 } 1286 1287 static void 1288 node_age(struct ieee80211_node *ni) 1289 { 1290 struct ieee80211vap *vap = ni->ni_vap; 1291 1292 /* 1293 * Age frames on the power save queue. 1294 */ 1295 if (ieee80211_node_psq_age(ni) != 0 && 1296 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1297 vap->iv_set_tim(ni, 0); 1298 /* 1299 * Age out HT resources (e.g. frames on the 1300 * A-MPDU reorder queues). 1301 */ 1302 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1303 ieee80211_ht_node_age(ni); 1304 } 1305 1306 static int8_t 1307 node_getrssi(const struct ieee80211_node *ni) 1308 { 1309 uint32_t avgrssi = ni->ni_avgrssi; 1310 int32_t rssi; 1311 1312 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1313 return 0; 1314 rssi = IEEE80211_RSSI_GET(avgrssi); 1315 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1316 } 1317 1318 static void 1319 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1320 { 1321 *rssi = node_getrssi(ni); 1322 *noise = ni->ni_noise; 1323 } 1324 1325 static void 1326 node_getmimoinfo(const struct ieee80211_node *ni, 1327 struct ieee80211_mimo_info *info) 1328 { 1329 int i; 1330 uint32_t avgrssi; 1331 int32_t rssi; 1332 1333 bzero(info, sizeof(*info)); 1334 1335 for (i = 0; i < MIN(IEEE80211_MAX_CHAINS, ni->ni_mimo_chains); i++) { 1336 /* Note: for now, just pri20 channel info */ 1337 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1338 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1339 info->ch[i].rssi[0] = 0; 1340 } else { 1341 rssi = IEEE80211_RSSI_GET(avgrssi); 1342 info->ch[i].rssi[0] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1343 } 1344 info->ch[i].noise[0] = ni->ni_mimo_noise_ctl[i]; 1345 } 1346 1347 /* XXX ext radios? */ 1348 1349 /* XXX EVM? */ 1350 } 1351 1352 static void 1353 ieee80211_add_node_nt(struct ieee80211_node_table *nt, 1354 struct ieee80211_node *ni) 1355 { 1356 struct ieee80211com *ic = nt->nt_ic; 1357 int hash; 1358 1359 IEEE80211_NODE_LOCK_ASSERT(nt); 1360 1361 hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr); 1362 (void) ic; /* XXX IEEE80211_NODE_HASH */ 1363 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1364 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1365 nt->nt_count++; 1366 ni->ni_table = nt; 1367 } 1368 1369 static void 1370 ieee80211_del_node_nt(struct ieee80211_node_table *nt, 1371 struct ieee80211_node *ni) 1372 { 1373 1374 IEEE80211_NODE_LOCK_ASSERT(nt); 1375 1376 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1377 LIST_REMOVE(ni, ni_hash); 1378 nt->nt_count--; 1379 KASSERT(nt->nt_count >= 0, 1380 ("nt_count is negative (%d)!\n", nt->nt_count)); 1381 ni->ni_table = NULL; 1382 } 1383 1384 struct ieee80211_node * 1385 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1386 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1387 { 1388 struct ieee80211com *ic = nt->nt_ic; 1389 struct ieee80211_node *ni; 1390 1391 ni = ic->ic_node_alloc(vap, macaddr); 1392 if (ni == NULL) { 1393 vap->iv_stats.is_rx_nodealloc++; 1394 return NULL; 1395 } 1396 1397 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1398 "%s %p<%s> in %s table\n", __func__, ni, 1399 ether_sprintf(macaddr), nt->nt_name); 1400 1401 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1402 ieee80211_node_initref(ni); /* mark referenced */ 1403 ni->ni_chan = IEEE80211_CHAN_ANYC; 1404 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1405 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1406 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1407 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1408 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1409 ni->ni_inact_reload = nt->nt_inact_init; 1410 ni->ni_inact = ni->ni_inact_reload; 1411 ni->ni_ath_defkeyix = 0x7fff; 1412 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1413 #ifdef IEEE80211_SUPPORT_MESH 1414 if (vap->iv_opmode == IEEE80211_M_MBSS) 1415 ieee80211_mesh_node_init(vap, ni); 1416 #endif 1417 IEEE80211_NODE_LOCK(nt); 1418 ieee80211_add_node_nt(nt, ni); 1419 ni->ni_vap = vap; 1420 ni->ni_ic = ic; 1421 IEEE80211_NODE_UNLOCK(nt); 1422 1423 /* handle failure; free node state */ 1424 if (ic->ic_node_init(ni) != 0) { 1425 vap->iv_stats.is_rx_nodealloc++; 1426 ieee80211_psq_cleanup(&ni->ni_psq); 1427 ieee80211_ratectl_node_deinit(ni); 1428 _ieee80211_free_node(ni); 1429 return NULL; 1430 } 1431 1432 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1433 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1434 1435 return ni; 1436 } 1437 1438 /* 1439 * Craft a temporary node suitable for sending a management frame 1440 * to the specified station. We craft only as much state as we 1441 * need to do the work since the node will be immediately reclaimed 1442 * once the send completes. 1443 */ 1444 struct ieee80211_node * 1445 ieee80211_tmp_node(struct ieee80211vap *vap, 1446 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1447 { 1448 struct ieee80211com *ic = vap->iv_ic; 1449 struct ieee80211_node *ni; 1450 1451 ni = ic->ic_node_alloc(vap, macaddr); 1452 if (ni != NULL) { 1453 struct ieee80211_node *bss = vap->iv_bss; 1454 1455 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1456 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1457 1458 ni->ni_table = NULL; /* NB: pedantic */ 1459 ni->ni_ic = ic; /* NB: needed to set channel */ 1460 ni->ni_vap = vap; 1461 1462 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1463 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1464 ieee80211_node_initref(ni); /* mark referenced */ 1465 /* NB: required by ieee80211_fix_rate */ 1466 ieee80211_node_set_chan(ni, bss->ni_chan); 1467 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1468 IEEE80211_KEYIX_NONE); 1469 ni->ni_txpower = bss->ni_txpower; 1470 /* XXX optimize away */ 1471 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1472 1473 ieee80211_ratectl_node_init(ni); 1474 1475 /* handle failure; free node state */ 1476 if (ic->ic_node_init(ni) != 0) { 1477 vap->iv_stats.is_rx_nodealloc++; 1478 ieee80211_psq_cleanup(&ni->ni_psq); 1479 ieee80211_ratectl_node_deinit(ni); 1480 _ieee80211_free_node(ni); 1481 return NULL; 1482 } 1483 1484 } else { 1485 /* XXX msg */ 1486 vap->iv_stats.is_rx_nodealloc++; 1487 } 1488 return ni; 1489 } 1490 1491 struct ieee80211_node * 1492 ieee80211_dup_bss(struct ieee80211vap *vap, 1493 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1494 { 1495 struct ieee80211com *ic = vap->iv_ic; 1496 struct ieee80211_node *ni; 1497 1498 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1499 if (ni != NULL) { 1500 struct ieee80211_node *bss = vap->iv_bss; 1501 /* 1502 * Inherit from iv_bss. 1503 */ 1504 copy_bss(ni, bss); 1505 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1506 ieee80211_node_set_chan(ni, bss->ni_chan); 1507 } 1508 return ni; 1509 } 1510 1511 /* 1512 * Create a bss node for a legacy WDS vap. The far end does 1513 * not associate so we just create create a new node and 1514 * simulate an association. The caller is responsible for 1515 * installing the node as the bss node and handling any further 1516 * setup work like authorizing the port. 1517 */ 1518 struct ieee80211_node * 1519 ieee80211_node_create_wds(struct ieee80211vap *vap, 1520 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1521 { 1522 struct ieee80211com *ic = vap->iv_ic; 1523 struct ieee80211_node *ni; 1524 1525 /* XXX check if node already in sta table? */ 1526 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1527 if (ni != NULL) { 1528 ni->ni_wdsvap = vap; 1529 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1530 /* 1531 * Inherit any manually configured settings. 1532 */ 1533 copy_bss(ni, vap->iv_bss); 1534 ieee80211_node_set_chan(ni, chan); 1535 /* NB: propagate ssid so available to WPA supplicant */ 1536 ni->ni_esslen = vap->iv_des_ssid[0].len; 1537 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1538 /* NB: no associd for peer */ 1539 /* 1540 * There are no management frames to use to 1541 * discover neighbor capabilities, so blindly 1542 * propagate the local configuration. 1543 */ 1544 if (vap->iv_flags & IEEE80211_F_WME) 1545 ni->ni_flags |= IEEE80211_NODE_QOS; 1546 #ifdef IEEE80211_SUPPORT_SUPERG 1547 if (vap->iv_flags & IEEE80211_F_FF) 1548 ni->ni_flags |= IEEE80211_NODE_FF; 1549 #endif 1550 /* XXX VHT */ 1551 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1552 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1553 /* 1554 * Device is HT-capable and HT is enabled for 1555 * the vap; setup HT operation. On return 1556 * ni_chan will be adjusted to an HT channel. 1557 */ 1558 ieee80211_ht_wds_init(ni); 1559 if (vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1560 printf("%s: TODO: vht_wds_init\n", __func__); 1561 } 1562 } else { 1563 struct ieee80211_channel *c = ni->ni_chan; 1564 /* 1565 * Force a legacy channel to be used. 1566 */ 1567 c = ieee80211_find_channel(ic, 1568 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1569 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1570 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1571 ni->ni_chan = c; 1572 } 1573 } 1574 return ni; 1575 } 1576 1577 struct ieee80211_node * 1578 #ifdef IEEE80211_DEBUG_REFCNT 1579 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1580 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1581 #else 1582 ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1583 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1584 #endif 1585 { 1586 struct ieee80211_node *ni; 1587 int hash; 1588 1589 IEEE80211_NODE_LOCK_ASSERT(nt); 1590 1591 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1592 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1593 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1594 ieee80211_ref_node(ni); /* mark referenced */ 1595 #ifdef IEEE80211_DEBUG_REFCNT 1596 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1597 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1598 func, line, 1599 ni, ether_sprintf(ni->ni_macaddr), 1600 ieee80211_node_refcnt(ni)); 1601 #endif 1602 return ni; 1603 } 1604 } 1605 return NULL; 1606 } 1607 1608 struct ieee80211_node * 1609 #ifdef IEEE80211_DEBUG_REFCNT 1610 ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1611 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1612 #else 1613 ieee80211_find_node(struct ieee80211_node_table *nt, 1614 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1615 #endif 1616 { 1617 struct ieee80211_node *ni; 1618 1619 IEEE80211_NODE_LOCK(nt); 1620 ni = ieee80211_find_node_locked(nt, macaddr); 1621 IEEE80211_NODE_UNLOCK(nt); 1622 return ni; 1623 } 1624 1625 struct ieee80211_node * 1626 #ifdef IEEE80211_DEBUG_REFCNT 1627 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1628 const struct ieee80211vap *vap, 1629 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1630 #else 1631 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1632 const struct ieee80211vap *vap, 1633 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1634 #endif 1635 { 1636 struct ieee80211_node *ni; 1637 int hash; 1638 1639 IEEE80211_NODE_LOCK_ASSERT(nt); 1640 1641 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1642 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1643 if (ni->ni_vap == vap && 1644 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1645 ieee80211_ref_node(ni); /* mark referenced */ 1646 #ifdef IEEE80211_DEBUG_REFCNT 1647 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1648 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1649 func, line, 1650 ni, ether_sprintf(ni->ni_macaddr), 1651 ieee80211_node_refcnt(ni)); 1652 #endif 1653 return ni; 1654 } 1655 } 1656 return NULL; 1657 } 1658 1659 struct ieee80211_node * 1660 #ifdef IEEE80211_DEBUG_REFCNT 1661 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1662 const struct ieee80211vap *vap, 1663 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1664 #else 1665 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1666 const struct ieee80211vap *vap, 1667 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1668 #endif 1669 { 1670 struct ieee80211_node *ni; 1671 1672 IEEE80211_NODE_LOCK(nt); 1673 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1674 IEEE80211_NODE_UNLOCK(nt); 1675 return ni; 1676 } 1677 1678 /* 1679 * Fake up a node; this handles node discovery in adhoc mode. 1680 * Note that for the driver's benefit we we treat this like 1681 * an association so the driver has an opportunity to setup 1682 * it's private state. 1683 */ 1684 struct ieee80211_node * 1685 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1686 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1687 { 1688 struct ieee80211_node *ni; 1689 1690 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1691 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1692 ni = ieee80211_dup_bss(vap, macaddr); 1693 if (ni != NULL) { 1694 struct ieee80211com *ic = vap->iv_ic; 1695 1696 /* XXX no rate negotiation; just dup */ 1697 ni->ni_rates = vap->iv_bss->ni_rates; 1698 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1699 ni->ni_flags |= IEEE80211_NODE_ERP; 1700 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1701 /* 1702 * In adhoc demo mode there are no management 1703 * frames to use to discover neighbor capabilities, 1704 * so blindly propagate the local configuration 1705 * so we can do interesting things (e.g. use 1706 * WME to disable ACK's). 1707 */ 1708 /* 1709 * XXX TODO: 11n? 1710 */ 1711 if (vap->iv_flags & IEEE80211_F_WME) 1712 ni->ni_flags |= IEEE80211_NODE_QOS; 1713 #ifdef IEEE80211_SUPPORT_SUPERG 1714 if (vap->iv_flags & IEEE80211_F_FF) 1715 ni->ni_flags |= IEEE80211_NODE_FF; 1716 #endif 1717 } 1718 ieee80211_node_setuptxparms(ni); 1719 ieee80211_ratectl_node_init(ni); 1720 1721 /* 1722 * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX, 1723 * not A-MPDU TX; not 11n rates, etc. We'll cycle 1724 * that after we hear that we can indeed do 11n 1725 * (either by a beacon frame or by a probe response.) 1726 */ 1727 1728 /* 1729 * This is the first time we see the node. 1730 */ 1731 if (ic->ic_newassoc != NULL) 1732 ic->ic_newassoc(ni, 1); 1733 1734 /* 1735 * Kick off a probe request to the given node; 1736 * we will then use the probe response to update 1737 * 11n/etc configuration state. 1738 * 1739 * XXX TODO: this isn't guaranteed, and until we get 1740 * a probe response, we won't be able to actually 1741 * do anything 802.11n related to the node. 1742 * So if this does indeed work, maybe we should hold 1743 * off on sending responses until we get the probe 1744 * response, or just default to some sensible subset 1745 * of 802.11n behaviour (eg always allow aggregation 1746 * negotiation TO us, but not FROM us, etc) so we 1747 * aren't entirely busted. 1748 */ 1749 if (vap->iv_opmode == IEEE80211_M_IBSS) { 1750 ieee80211_send_probereq(ni, /* node */ 1751 vap->iv_myaddr, /* SA */ 1752 ni->ni_macaddr, /* DA */ 1753 vap->iv_bss->ni_bssid, /* BSSID */ 1754 vap->iv_bss->ni_essid, 1755 vap->iv_bss->ni_esslen); /* SSID */ 1756 } 1757 1758 /* XXX not right for 802.1x/WPA */ 1759 ieee80211_node_authorize(ni); 1760 } 1761 return ni; 1762 } 1763 1764 void 1765 ieee80211_init_neighbor(struct ieee80211_node *ni, 1766 const struct ieee80211_frame *wh, 1767 const struct ieee80211_scanparams *sp) 1768 { 1769 int do_ht_setup = 0, do_vht_setup = 0; 1770 1771 ni->ni_esslen = sp->ssid[1]; 1772 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1773 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1774 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1775 ni->ni_intval = sp->bintval; 1776 ni->ni_capinfo = sp->capinfo; 1777 ni->ni_chan = ni->ni_ic->ic_curchan; 1778 ni->ni_fhdwell = sp->fhdwell; 1779 ni->ni_fhindex = sp->fhindex; 1780 ni->ni_erp = sp->erp; 1781 ni->ni_timoff = sp->timoff; 1782 #ifdef IEEE80211_SUPPORT_MESH 1783 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1784 ieee80211_mesh_init_neighbor(ni, wh, sp); 1785 #endif 1786 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1787 ieee80211_ies_expand(&ni->ni_ies); 1788 if (ni->ni_ies.wme_ie != NULL) 1789 ni->ni_flags |= IEEE80211_NODE_QOS; 1790 else 1791 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1792 #ifdef IEEE80211_SUPPORT_SUPERG 1793 if (ni->ni_ies.ath_ie != NULL) 1794 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1795 #endif 1796 if (ni->ni_ies.htcap_ie != NULL) 1797 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1798 if (ni->ni_ies.htinfo_ie != NULL) 1799 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1800 1801 if (ni->ni_ies.vhtcap_ie != NULL) 1802 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 1803 if (ni->ni_ies.vhtopmode_ie != NULL) 1804 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 1805 1806 if ((ni->ni_ies.htcap_ie != NULL) && 1807 (ni->ni_ies.htinfo_ie != NULL) && 1808 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1809 do_ht_setup = 1; 1810 } 1811 1812 if ((ni->ni_ies.vhtcap_ie != NULL) && 1813 (ni->ni_ies.vhtopmode_ie != NULL) && 1814 (ni->ni_vap->iv_flags_vht & IEEE80211_FVHT_VHT)) { 1815 do_vht_setup = 1; 1816 } 1817 } 1818 1819 /* NB: must be after ni_chan is setup */ 1820 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1821 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1822 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1823 1824 /* 1825 * If the neighbor is HT compatible, flip that on. 1826 */ 1827 if (do_ht_setup) { 1828 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1829 "%s: doing HT setup\n", __func__); 1830 ieee80211_ht_node_init(ni); 1831 ieee80211_ht_updateparams(ni, 1832 ni->ni_ies.htcap_ie, 1833 ni->ni_ies.htinfo_ie); 1834 1835 if (do_vht_setup) { 1836 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1837 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1838 __func__, 1839 ni->ni_macaddr, 1840 ":"); 1841 } else { 1842 ieee80211_vht_node_init(ni); 1843 ieee80211_vht_updateparams(ni, 1844 ni->ni_ies.vhtcap_ie, 1845 ni->ni_ies.vhtopmode_ie); 1846 ieee80211_setup_vht_rates(ni, 1847 ni->ni_ies.vhtcap_ie, 1848 ni->ni_ies.vhtopmode_ie); 1849 } 1850 } 1851 1852 /* 1853 * Finally do the channel upgrade/change based 1854 * on the HT/VHT configuration. 1855 */ 1856 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1857 ni->ni_ies.htinfo_ie); 1858 ieee80211_setup_htrates(ni, 1859 ni->ni_ies.htcap_ie, 1860 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1861 ieee80211_setup_basic_htrates(ni, 1862 ni->ni_ies.htinfo_ie); 1863 1864 ieee80211_node_setuptxparms(ni); 1865 ieee80211_ratectl_node_init(ni); 1866 1867 /* Reassociate; we're now 11n/11ac */ 1868 /* 1869 * XXX TODO: this is the wrong thing to do - 1870 * we're calling it with isnew=1 so the ath(4) 1871 * driver reinitialises the rate tables. 1872 * This "mostly" works for ath(4), but it won't 1873 * be right for firmware devices which allocate 1874 * node states. 1875 * 1876 * So, do we just create a new node and delete 1877 * the old one? Or? 1878 */ 1879 if (ni->ni_ic->ic_newassoc) 1880 ni->ni_ic->ic_newassoc(ni, 1); 1881 } 1882 } 1883 1884 /* 1885 * Do node discovery in adhoc mode on receipt of a beacon 1886 * or probe response frame. Note that for the driver's 1887 * benefit we we treat this like an association so the 1888 * driver has an opportunity to setup it's private state. 1889 */ 1890 struct ieee80211_node * 1891 ieee80211_add_neighbor(struct ieee80211vap *vap, 1892 const struct ieee80211_frame *wh, 1893 const struct ieee80211_scanparams *sp) 1894 { 1895 struct ieee80211_node *ni; 1896 1897 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1898 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1899 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1900 if (ni != NULL) { 1901 struct ieee80211com *ic = vap->iv_ic; 1902 1903 ieee80211_init_neighbor(ni, wh, sp); 1904 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1905 ni->ni_flags |= IEEE80211_NODE_ERP; 1906 ieee80211_node_setuptxparms(ni); 1907 ieee80211_ratectl_node_init(ni); 1908 if (ic->ic_newassoc != NULL) 1909 ic->ic_newassoc(ni, 1); 1910 /* XXX not right for 802.1x/WPA */ 1911 ieee80211_node_authorize(ni); 1912 } 1913 return ni; 1914 } 1915 1916 #define IS_PROBEREQ(wh) \ 1917 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1918 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1919 #define IS_BCAST_PROBEREQ(wh) \ 1920 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1921 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1922 1923 static __inline struct ieee80211_node * 1924 _find_rxnode(struct ieee80211_node_table *nt, 1925 const struct ieee80211_frame_min *wh) 1926 { 1927 if (IS_BCAST_PROBEREQ(wh)) 1928 return NULL; /* spam bcast probe req to all vap's */ 1929 return ieee80211_find_node_locked(nt, wh->i_addr2); 1930 } 1931 1932 /* 1933 * Locate the node for sender, track state, and then pass the 1934 * (referenced) node up to the 802.11 layer for its use. Note 1935 * we can return NULL if the sender is not in the table. 1936 */ 1937 struct ieee80211_node * 1938 #ifdef IEEE80211_DEBUG_REFCNT 1939 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1940 const struct ieee80211_frame_min *wh, const char *func, int line) 1941 #else 1942 ieee80211_find_rxnode(struct ieee80211com *ic, 1943 const struct ieee80211_frame_min *wh) 1944 #endif 1945 { 1946 struct ieee80211_node_table *nt; 1947 struct ieee80211_node *ni; 1948 1949 nt = &ic->ic_sta; 1950 IEEE80211_NODE_LOCK(nt); 1951 ni = _find_rxnode(nt, wh); 1952 IEEE80211_NODE_UNLOCK(nt); 1953 1954 return ni; 1955 } 1956 1957 /* 1958 * Like ieee80211_find_rxnode but use the supplied h/w 1959 * key index as a hint to locate the node in the key 1960 * mapping table. If an entry is present at the key 1961 * index we return it; otherwise do a normal lookup and 1962 * update the mapping table if the station has a unicast 1963 * key assigned to it. 1964 */ 1965 struct ieee80211_node * 1966 #ifdef IEEE80211_DEBUG_REFCNT 1967 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1968 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1969 const char *func, int line) 1970 #else 1971 ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1972 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1973 #endif 1974 { 1975 struct ieee80211_node_table *nt; 1976 struct ieee80211_node *ni; 1977 1978 nt = &ic->ic_sta; 1979 IEEE80211_NODE_LOCK(nt); 1980 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1981 ni = nt->nt_keyixmap[keyix]; 1982 else 1983 ni = NULL; 1984 if (ni == NULL) { 1985 ni = _find_rxnode(nt, wh); 1986 if (ni != NULL && nt->nt_keyixmap != NULL) { 1987 /* 1988 * If the station has a unicast key cache slot 1989 * assigned update the key->node mapping table. 1990 */ 1991 keyix = ni->ni_ucastkey.wk_rxkeyix; 1992 /* XXX can keyixmap[keyix] != NULL? */ 1993 if (keyix < nt->nt_keyixmax && 1994 nt->nt_keyixmap[keyix] == NULL) { 1995 IEEE80211_DPRINTF(ni->ni_vap, 1996 IEEE80211_MSG_NODE, 1997 "%s: add key map entry %p<%s> refcnt %d\n", 1998 __func__, ni, ether_sprintf(ni->ni_macaddr), 1999 ieee80211_node_refcnt(ni)+1); 2000 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 2001 } 2002 } 2003 } else { 2004 if (IS_BCAST_PROBEREQ(wh)) 2005 ni = NULL; /* spam bcast probe req to all vap's */ 2006 else 2007 ieee80211_ref_node(ni); 2008 } 2009 IEEE80211_NODE_UNLOCK(nt); 2010 2011 return ni; 2012 } 2013 #undef IS_BCAST_PROBEREQ 2014 #undef IS_PROBEREQ 2015 2016 /* 2017 * Return a reference to the appropriate node for sending 2018 * a data frame. This handles node discovery in adhoc networks. 2019 */ 2020 struct ieee80211_node * 2021 #ifdef IEEE80211_DEBUG_REFCNT 2022 ieee80211_find_txnode_debug(struct ieee80211vap *vap, 2023 const uint8_t macaddr[IEEE80211_ADDR_LEN], 2024 const char *func, int line) 2025 #else 2026 ieee80211_find_txnode(struct ieee80211vap *vap, 2027 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 2028 #endif 2029 { 2030 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 2031 struct ieee80211_node *ni; 2032 2033 /* 2034 * The destination address should be in the node table 2035 * unless this is a multicast/broadcast frame. We can 2036 * also optimize station mode operation, all frames go 2037 * to the bss node. 2038 */ 2039 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 2040 IEEE80211_NODE_LOCK(nt); 2041 if (vap->iv_opmode == IEEE80211_M_STA || 2042 vap->iv_opmode == IEEE80211_M_WDS || 2043 IEEE80211_IS_MULTICAST(macaddr)) 2044 ni = ieee80211_ref_node(vap->iv_bss); 2045 else 2046 ni = ieee80211_find_node_locked(nt, macaddr); 2047 IEEE80211_NODE_UNLOCK(nt); 2048 2049 if (ni == NULL) { 2050 if (vap->iv_opmode == IEEE80211_M_IBSS || 2051 vap->iv_opmode == IEEE80211_M_AHDEMO) { 2052 /* 2053 * In adhoc mode cons up a node for the destination. 2054 * Note that we need an additional reference for the 2055 * caller to be consistent with 2056 * ieee80211_find_node_locked. 2057 */ 2058 /* 2059 * XXX TODO: this doesn't fake up 11n state; we need 2060 * to find another way to get it upgraded. 2061 */ 2062 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 2063 if (ni != NULL) 2064 (void) ieee80211_ref_node(ni); 2065 } else { 2066 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 2067 "no node, discard frame (%s)", __func__); 2068 vap->iv_stats.is_tx_nonode++; 2069 } 2070 } 2071 return ni; 2072 } 2073 2074 static void 2075 _ieee80211_free_node(struct ieee80211_node *ni) 2076 { 2077 struct ieee80211_node_table *nt = ni->ni_table; 2078 2079 /* 2080 * NB: careful about referencing the vap as it may be 2081 * gone if the last reference was held by a driver. 2082 * We know the com will always be present so it's safe 2083 * to use ni_ic below to reclaim resources. 2084 */ 2085 #if 0 2086 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2087 "%s %p<%s> in %s table\n", __func__, ni, 2088 ether_sprintf(ni->ni_macaddr), 2089 nt != NULL ? nt->nt_name : "<gone>"); 2090 #endif 2091 if (ni->ni_associd != 0) { 2092 struct ieee80211vap *vap = ni->ni_vap; 2093 if (vap->iv_aid_bitmap != NULL) 2094 IEEE80211_AID_CLR(vap, ni->ni_associd); 2095 } 2096 if (nt != NULL) 2097 ieee80211_del_node_nt(nt, ni); 2098 ni->ni_ic->ic_node_free(ni); 2099 } 2100 2101 /* 2102 * Clear any entry in the unicast key mapping table. 2103 */ 2104 static int 2105 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2106 { 2107 ieee80211_keyix keyix; 2108 2109 keyix = ni->ni_ucastkey.wk_rxkeyix; 2110 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 2111 nt->nt_keyixmap[keyix] == ni) { 2112 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2113 "%s: %p<%s> clear key map entry %u\n", 2114 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 2115 nt->nt_keyixmap[keyix] = NULL; 2116 ieee80211_node_decref(ni); 2117 return 1; 2118 } 2119 2120 return 0; 2121 } 2122 2123 void 2124 #ifdef IEEE80211_DEBUG_REFCNT 2125 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 2126 #else 2127 ieee80211_free_node(struct ieee80211_node *ni) 2128 #endif 2129 { 2130 struct ieee80211_node_table *nt = ni->ni_table; 2131 2132 #ifdef IEEE80211_DEBUG_REFCNT 2133 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2134 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 2135 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 2136 #endif 2137 if (nt != NULL) { 2138 IEEE80211_NODE_LOCK(nt); 2139 if (ieee80211_node_dectestref(ni)) { 2140 /* 2141 * Last reference, reclaim state. 2142 */ 2143 _ieee80211_free_node(ni); 2144 } else if (ieee80211_node_refcnt(ni) == 1) 2145 if (node_clear_keyixmap(nt, ni)) 2146 _ieee80211_free_node(ni); 2147 IEEE80211_NODE_UNLOCK(nt); 2148 } else { 2149 if (ieee80211_node_dectestref(ni)) 2150 _ieee80211_free_node(ni); 2151 } 2152 } 2153 2154 /* 2155 * Reclaim a unicast key and clear any key cache state. 2156 */ 2157 int 2158 ieee80211_node_delucastkey(struct ieee80211_node *ni) 2159 { 2160 struct ieee80211com *ic = ni->ni_ic; 2161 struct ieee80211_node_table *nt = &ic->ic_sta; 2162 struct ieee80211_node *nikey; 2163 ieee80211_keyix keyix; 2164 int isowned, status; 2165 2166 /* 2167 * NB: We must beware of LOR here; deleting the key 2168 * can cause the crypto layer to block traffic updates 2169 * which can generate a LOR against the node table lock; 2170 * grab it here and stash the key index for our use below. 2171 * 2172 * Must also beware of recursion on the node table lock. 2173 * When called from node_cleanup we may already have 2174 * the node table lock held. Unfortunately there's no 2175 * way to separate out this path so we must do this 2176 * conditionally. 2177 */ 2178 isowned = IEEE80211_NODE_IS_LOCKED(nt); 2179 if (!isowned) 2180 IEEE80211_NODE_LOCK(nt); 2181 nikey = NULL; 2182 status = 1; /* NB: success */ 2183 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 2184 keyix = ni->ni_ucastkey.wk_rxkeyix; 2185 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 2186 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 2187 nikey = nt->nt_keyixmap[keyix]; 2188 nt->nt_keyixmap[keyix] = NULL; 2189 } 2190 } 2191 if (!isowned) 2192 IEEE80211_NODE_UNLOCK(nt); 2193 2194 if (nikey != NULL) { 2195 KASSERT(nikey == ni, 2196 ("key map out of sync, ni %p nikey %p", ni, nikey)); 2197 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2198 "%s: delete key map entry %p<%s> refcnt %d\n", 2199 __func__, ni, ether_sprintf(ni->ni_macaddr), 2200 ieee80211_node_refcnt(ni)-1); 2201 ieee80211_free_node(ni); 2202 } 2203 return status; 2204 } 2205 2206 /* 2207 * Reclaim a node. If this is the last reference count then 2208 * do the normal free work. Otherwise remove it from the node 2209 * table and mark it gone by clearing the back-reference. 2210 */ 2211 static void 2212 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2213 { 2214 2215 IEEE80211_NODE_LOCK_ASSERT(nt); 2216 2217 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2218 "%s: remove %p<%s> from %s table, refcnt %d\n", 2219 __func__, ni, ether_sprintf(ni->ni_macaddr), 2220 nt->nt_name, ieee80211_node_refcnt(ni)-1); 2221 /* 2222 * Clear any entry in the unicast key mapping table. 2223 * We need to do it here so rx lookups don't find it 2224 * in the mapping table even if it's not in the hash 2225 * table. We cannot depend on the mapping table entry 2226 * being cleared because the node may not be free'd. 2227 */ 2228 (void)node_clear_keyixmap(nt, ni); 2229 if (!ieee80211_node_dectestref(ni)) { 2230 /* 2231 * Other references are present, just remove the 2232 * node from the table so it cannot be found. When 2233 * the references are dropped storage will be 2234 * reclaimed. 2235 */ 2236 ieee80211_del_node_nt(nt, ni); 2237 } else 2238 _ieee80211_free_node(ni); 2239 } 2240 2241 /* 2242 * Node table support. 2243 */ 2244 2245 static void 2246 ieee80211_node_table_init(struct ieee80211com *ic, 2247 struct ieee80211_node_table *nt, 2248 const char *name, int inact, int keyixmax) 2249 { 2250 2251 nt->nt_ic = ic; 2252 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 2253 TAILQ_INIT(&nt->nt_node); 2254 nt->nt_count = 0; 2255 nt->nt_name = name; 2256 nt->nt_inact_init = inact; 2257 nt->nt_keyixmax = keyixmax; 2258 if (nt->nt_keyixmax > 0) { 2259 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 2260 keyixmax * sizeof(struct ieee80211_node *), 2261 M_80211_NODE, 2262 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2263 if (nt->nt_keyixmap == NULL) 2264 ic_printf(ic, 2265 "Cannot allocate key index map with %u entries\n", 2266 keyixmax); 2267 } else 2268 nt->nt_keyixmap = NULL; 2269 } 2270 2271 static void 2272 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 2273 struct ieee80211vap *match) 2274 { 2275 struct ieee80211_node *ni, *next; 2276 2277 IEEE80211_NODE_LOCK(nt); 2278 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 2279 if (match != NULL && ni->ni_vap != match) 2280 continue; 2281 /* XXX can this happen? if so need's work */ 2282 if (ni->ni_associd != 0) { 2283 struct ieee80211vap *vap = ni->ni_vap; 2284 2285 if (vap->iv_auth->ia_node_leave != NULL) 2286 vap->iv_auth->ia_node_leave(ni); 2287 if (vap->iv_aid_bitmap != NULL) 2288 IEEE80211_AID_CLR(vap, ni->ni_associd); 2289 } 2290 ni->ni_wdsvap = NULL; /* clear reference */ 2291 node_reclaim(nt, ni); 2292 } 2293 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 2294 /* 2295 * Make a separate pass to clear references to this vap 2296 * held by DWDS entries. They will not be matched above 2297 * because ni_vap will point to the ap vap but we still 2298 * need to clear ni_wdsvap when the WDS vap is destroyed 2299 * and/or reset. 2300 */ 2301 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 2302 if (ni->ni_wdsvap == match) 2303 ni->ni_wdsvap = NULL; 2304 } 2305 IEEE80211_NODE_UNLOCK(nt); 2306 } 2307 2308 static void 2309 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2310 { 2311 ieee80211_node_table_reset(nt, NULL); 2312 if (nt->nt_keyixmap != NULL) { 2313 #ifdef DIAGNOSTIC 2314 /* XXX verify all entries are NULL */ 2315 int i; 2316 for (i = 0; i < nt->nt_keyixmax; i++) 2317 if (nt->nt_keyixmap[i] != NULL) 2318 printf("%s: %s[%u] still active\n", __func__, 2319 nt->nt_name, i); 2320 #endif 2321 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 2322 nt->nt_keyixmap = NULL; 2323 } 2324 IEEE80211_NODE_LOCK_DESTROY(nt); 2325 } 2326 2327 static void 2328 timeout_stations(void *arg __unused, struct ieee80211_node *ni) 2329 { 2330 struct ieee80211com *ic = ni->ni_ic; 2331 struct ieee80211vap *vap = ni->ni_vap; 2332 2333 /* 2334 * Only process stations when in RUN state. This 2335 * insures, for example, that we don't timeout an 2336 * inactive station during CAC. Note that CSA state 2337 * is actually handled in ieee80211_node_timeout as 2338 * it applies to more than timeout processing. 2339 */ 2340 if (vap->iv_state != IEEE80211_S_RUN) 2341 return; 2342 /* 2343 * Ignore entries for which have yet to receive an 2344 * authentication frame. These are transient and 2345 * will be reclaimed when the last reference to them 2346 * goes away (when frame xmits complete). 2347 */ 2348 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2349 vap->iv_opmode == IEEE80211_M_STA) && 2350 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2351 return; 2352 /* 2353 * Free fragment if not needed anymore 2354 * (last fragment older than 1s). 2355 * XXX doesn't belong here, move to node_age 2356 */ 2357 if (ni->ni_rxfrag[0] != NULL && 2358 ticks > ni->ni_rxfragstamp + hz) { 2359 m_freem(ni->ni_rxfrag[0]); 2360 ni->ni_rxfrag[0] = NULL; 2361 } 2362 if (ni->ni_inact > 0) { 2363 ni->ni_inact--; 2364 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2365 "%s: inact %u inact_reload %u nrates %u", 2366 __func__, ni->ni_inact, ni->ni_inact_reload, 2367 ni->ni_rates.rs_nrates); 2368 } 2369 /* 2370 * Special case ourself; we may be idle for extended periods 2371 * of time and regardless reclaiming our state is wrong. 2372 * XXX run ic_node_age 2373 */ 2374 /* XXX before inact decrement? */ 2375 if (ni == vap->iv_bss) 2376 return; 2377 if (ni->ni_associd != 0 || 2378 (vap->iv_opmode == IEEE80211_M_IBSS || 2379 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2380 /* 2381 * Age/drain resources held by the station. 2382 */ 2383 ic->ic_node_age(ni); 2384 /* 2385 * Probe the station before time it out. We 2386 * send a null data frame which may not be 2387 * universally supported by drivers (need it 2388 * for ps-poll support so it should be...). 2389 * 2390 * XXX don't probe the station unless we've 2391 * received a frame from them (and have 2392 * some idea of the rates they are capable 2393 * of); this will get fixed more properly 2394 * soon with better handling of the rate set. 2395 */ 2396 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2397 (0 < ni->ni_inact && 2398 ni->ni_inact <= vap->iv_inact_probe) && 2399 ni->ni_rates.rs_nrates != 0) { 2400 IEEE80211_NOTE(vap, 2401 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2402 ni, "%s", 2403 "probe station due to inactivity"); 2404 /* 2405 * Grab a reference so the node cannot 2406 * be reclaimed before we send the frame. 2407 * ieee80211_send_nulldata understands 2408 * we've done this and reclaims the 2409 * ref for us as needed. 2410 */ 2411 /* XXX fix this (not required anymore). */ 2412 ieee80211_ref_node(ni); 2413 /* XXX useless */ 2414 ieee80211_send_nulldata(ni); 2415 /* XXX stat? */ 2416 return; 2417 } 2418 } 2419 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2420 ni->ni_inact <= 0) { 2421 IEEE80211_NOTE(vap, 2422 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2423 "station timed out due to inactivity " 2424 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2425 /* 2426 * Send a deauthenticate frame and drop the station. 2427 * This is somewhat complicated due to reference counts 2428 * and locking. At this point a station will typically 2429 * have a reference count of 2. ieee80211_node_leave 2430 * will do a "free" of the node which will drop the 2431 * reference count. But in the meantime a reference 2432 * wil be held by the deauth frame. The actual reclaim 2433 * of the node will happen either after the tx is 2434 * completed or by ieee80211_node_leave. 2435 */ 2436 if (ni->ni_associd != 0) { 2437 IEEE80211_SEND_MGMT(ni, 2438 IEEE80211_FC0_SUBTYPE_DEAUTH, 2439 IEEE80211_REASON_AUTH_EXPIRE); 2440 } 2441 ieee80211_node_leave(ni); 2442 vap->iv_stats.is_node_timeout++; 2443 } 2444 } 2445 2446 /* 2447 * Timeout inactive stations and do related housekeeping. 2448 */ 2449 static void 2450 ieee80211_timeout_stations(struct ieee80211com *ic) 2451 { 2452 struct ieee80211_node_table *nt = &ic->ic_sta; 2453 2454 ieee80211_iterate_nodes(nt, timeout_stations, NULL); 2455 } 2456 2457 /* 2458 * Aggressively reclaim resources. This should be used 2459 * only in a critical situation to reclaim mbuf resources. 2460 */ 2461 void 2462 ieee80211_drain(struct ieee80211com *ic) 2463 { 2464 struct ieee80211_node_table *nt = &ic->ic_sta; 2465 struct ieee80211vap *vap; 2466 struct ieee80211_node *ni; 2467 2468 IEEE80211_NODE_LOCK(nt); 2469 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2470 /* 2471 * Ignore entries for which have yet to receive an 2472 * authentication frame. These are transient and 2473 * will be reclaimed when the last reference to them 2474 * goes away (when frame xmits complete). 2475 */ 2476 vap = ni->ni_vap; 2477 /* 2478 * Only process stations when in RUN state. This 2479 * insures, for example, that we don't timeout an 2480 * inactive station during CAC. Note that CSA state 2481 * is actually handled in ieee80211_node_timeout as 2482 * it applies to more than timeout processing. 2483 */ 2484 if (vap->iv_state != IEEE80211_S_RUN) 2485 continue; 2486 /* XXX can vap be NULL? */ 2487 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2488 vap->iv_opmode == IEEE80211_M_STA) && 2489 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2490 continue; 2491 /* 2492 * Free fragments. 2493 * XXX doesn't belong here, move to node_drain 2494 */ 2495 if (ni->ni_rxfrag[0] != NULL) { 2496 m_freem(ni->ni_rxfrag[0]); 2497 ni->ni_rxfrag[0] = NULL; 2498 } 2499 /* 2500 * Drain resources held by the station. 2501 */ 2502 ic->ic_node_drain(ni); 2503 } 2504 IEEE80211_NODE_UNLOCK(nt); 2505 } 2506 2507 /* 2508 * Per-ieee80211vap inactivity timer callback. 2509 */ 2510 static void 2511 ieee80211_vap_timeout(struct ieee80211vap *vap) 2512 { 2513 2514 IEEE80211_LOCK_ASSERT(vap->iv_ic); 2515 2516 ieee80211_vap_erp_timeout(vap); 2517 ieee80211_ht_timeout(vap); 2518 ieee80211_vht_timeout(vap); 2519 } 2520 2521 /* 2522 * Per-ieee80211com inactivity timer callback. 2523 */ 2524 void 2525 ieee80211_node_timeout(void *arg) 2526 { 2527 struct ieee80211com *ic = arg; 2528 struct ieee80211vap *vap; 2529 2530 /* 2531 * Defer timeout processing if a channel switch is pending. 2532 * We typically need to be mute so not doing things that 2533 * might generate frames is good to handle in one place. 2534 * Suppressing the station timeout processing may extend the 2535 * lifetime of inactive stations (by not decrementing their 2536 * idle counters) but this should be ok unless the CSA is 2537 * active for an unusually long time. 2538 */ 2539 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2540 ieee80211_scan_timeout(ic); 2541 ieee80211_timeout_stations(ic); 2542 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2543 2544 IEEE80211_LOCK(ic); 2545 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2546 ieee80211_vap_timeout(vap); 2547 IEEE80211_UNLOCK(ic); 2548 } 2549 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2550 ieee80211_node_timeout, ic); 2551 } 2552 2553 /* 2554 * The same as ieee80211_iterate_nodes(), but for one vap only. 2555 */ 2556 int 2557 ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt, 2558 struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg) 2559 { 2560 struct ieee80211_node **ni_arr; 2561 struct ieee80211_node *ni; 2562 size_t size; 2563 int count, i; 2564 2565 /* 2566 * Iterate over the node table and save an array of ref'ed nodes. 2567 * 2568 * This is separated out from calling the actual node function so that 2569 * no LORs will occur. 2570 */ 2571 IEEE80211_NODE_LOCK(nt); 2572 count = nt->nt_count; 2573 size = count * sizeof(struct ieee80211_node *); 2574 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2575 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2576 if (ni_arr == NULL) { 2577 IEEE80211_NODE_UNLOCK(nt); 2578 return (ENOMEM); 2579 } 2580 2581 i = 0; 2582 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2583 if (vap != NULL && ni->ni_vap != vap) 2584 continue; 2585 KASSERT(i < count, 2586 ("node array overflow (vap %p, i %d, count %d)\n", 2587 vap, i, count)); 2588 ni_arr[i] = ieee80211_ref_node(ni); 2589 i++; 2590 } 2591 IEEE80211_NODE_UNLOCK(nt); 2592 2593 for (i = 0; i < count; i++) { 2594 if (ni_arr[i] == NULL) /* end of the list */ 2595 break; 2596 (*f)(arg, ni_arr[i]); 2597 /* ieee80211_free_node() locks by itself */ 2598 ieee80211_free_node(ni_arr[i]); 2599 } 2600 2601 IEEE80211_FREE(ni_arr, M_80211_NODE); 2602 2603 return (0); 2604 } 2605 2606 /* 2607 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2608 * reference in the source. 2609 */ 2610 void 2611 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2612 ieee80211_iter_func *f, void *arg) 2613 { 2614 /* XXX no way to pass error to the caller. */ 2615 (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg); 2616 } 2617 2618 void 2619 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2620 { 2621 printf("0x%p: mac %s refcnt %d\n", ni, 2622 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2623 printf("\tauthmode %u flags 0x%x\n", 2624 ni->ni_authmode, ni->ni_flags); 2625 printf("\tassocid 0x%x txpower %u vlan %u\n", 2626 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2627 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2628 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2629 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2630 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2631 ni->ni_rxfragstamp); 2632 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2633 node_getrssi(ni), ni->ni_noise, 2634 ni->ni_intval, ni->ni_capinfo); 2635 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2636 ether_sprintf(ni->ni_bssid), 2637 ni->ni_esslen, ni->ni_essid, 2638 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2639 printf("\tinact %u inact_reload %u txrate %u\n", 2640 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2641 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2642 ni->ni_htcap, ni->ni_htparam, 2643 ni->ni_htctlchan, ni->ni_ht2ndchan); 2644 printf("\thtopmode %x htstbc %x htchw %u\n", 2645 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2646 printf("\tvhtcap %x freq1 %d freq2 %d vhtbasicmcs %x\n", 2647 ni->ni_vhtcap, (int) ni->ni_vht_chan1, (int) ni->ni_vht_chan2, 2648 (int) ni->ni_vht_basicmcs); 2649 /* XXX VHT state */ 2650 } 2651 2652 void 2653 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2654 { 2655 ieee80211_iterate_nodes(nt, 2656 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2657 } 2658 2659 /* 2660 * Iterate over the VAPs and update their ERP beacon IEs. 2661 * 2662 * Note this must be called from the deferred ERP update task paths. 2663 */ 2664 void 2665 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2666 { 2667 struct ieee80211vap *vap; 2668 2669 IEEE80211_LOCK_ASSERT(ic); 2670 2671 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2672 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2673 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2674 } 2675 2676 /* 2677 * Handle a station joining an 11g network. 2678 */ 2679 static void 2680 ieee80211_node_join_11g(struct ieee80211_node *ni) 2681 { 2682 struct ieee80211com *ic = ni->ni_ic; 2683 struct ieee80211vap *vap = ni->ni_vap; 2684 2685 IEEE80211_LOCK_ASSERT(ic); 2686 2687 /* 2688 * Station isn't capable of short slot time. Bump 2689 * the count of long slot time stations and disable 2690 * use of short slot time. Note that the actual switch 2691 * over to long slot time use may not occur until the 2692 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2693 */ 2694 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2695 vap->iv_longslotsta++; 2696 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2697 "station needs long slot time, count %d", 2698 vap->iv_longslotsta); 2699 /* 2700 * XXX TODO: this may need all VAPs checked! 2701 */ 2702 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2703 /* 2704 * Don't force slot time when switched to turbo 2705 * mode as non-ERP stations won't be present; this 2706 * need only be done when on the normal G channel. 2707 */ 2708 ieee80211_vap_set_shortslottime(vap, 0); 2709 } 2710 } 2711 /* 2712 * If the new station is not an ERP station 2713 * then bump the counter and enable protection 2714 * if configured. 2715 */ 2716 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2717 vap->iv_nonerpsta++; 2718 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2719 "station is !ERP, %d non-ERP stations associated", 2720 vap->iv_nonerpsta); 2721 /* 2722 * If station does not support short preamble 2723 * then we must enable use of Barker preamble. 2724 */ 2725 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2726 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2727 "%s", "station needs long preamble"); 2728 vap->iv_flags |= IEEE80211_F_USEBARKER; 2729 vap->iv_flags &= ~IEEE80211_F_SHPREAMBLE; 2730 ieee80211_vap_update_preamble(vap); 2731 } 2732 /* 2733 * If protection is configured and this is the first 2734 * indication we should use protection, enable it. 2735 */ 2736 if (vap->iv_protmode != IEEE80211_PROT_NONE && 2737 vap->iv_nonerpsta == 1 && 2738 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2739 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2740 "%s: enable use of protection\n", __func__); 2741 vap->iv_flags |= IEEE80211_F_USEPROT; 2742 ieee80211_vap_update_erp_protmode(vap); 2743 } 2744 } else 2745 ni->ni_flags |= IEEE80211_NODE_ERP; 2746 } 2747 2748 void 2749 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2750 { 2751 struct ieee80211com *ic = ni->ni_ic; 2752 struct ieee80211vap *vap = ni->ni_vap; 2753 int newassoc; 2754 2755 if (ni->ni_associd == 0) { 2756 uint16_t aid; 2757 2758 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2759 /* 2760 * It would be good to search the bitmap 2761 * more efficiently, but this will do for now. 2762 */ 2763 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2764 if (!IEEE80211_AID_ISSET(vap, aid)) 2765 break; 2766 } 2767 if (aid >= vap->iv_max_aid) { 2768 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2769 ieee80211_node_leave(ni); 2770 return; 2771 } 2772 ni->ni_associd = aid | 0xc000; 2773 ni->ni_jointime = time_uptime; 2774 IEEE80211_LOCK(ic); 2775 IEEE80211_AID_SET(vap, ni->ni_associd); 2776 vap->iv_sta_assoc++; 2777 2778 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2779 ieee80211_ht_node_join(ni); 2780 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2781 ieee80211_vht_node_join(ni); 2782 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2783 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2784 ieee80211_node_join_11g(ni); 2785 IEEE80211_UNLOCK(ic); 2786 2787 newassoc = 1; 2788 } else 2789 newassoc = 0; 2790 2791 /* 2792 * XXX VHT - should log VHT channel width, etc 2793 */ 2794 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2795 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s%s", 2796 IEEE80211_NODE_AID(ni), 2797 vap->iv_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2798 vap->iv_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2799 vap->iv_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2800 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2801 /* XXX update for VHT string */ 2802 ni->ni_flags & IEEE80211_NODE_HT ? 2803 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2804 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2805 ni->ni_flags & IEEE80211_NODE_AMSDU ? " (+AMSDU)" : "", 2806 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2807 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2808 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2809 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2810 ", fast-frames" : "", 2811 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2812 ", turbo" : "" 2813 ); 2814 2815 ieee80211_node_setuptxparms(ni); 2816 ieee80211_ratectl_node_init(ni); 2817 /* give driver a chance to setup state like ni_txrate */ 2818 if (ic->ic_newassoc != NULL) 2819 ic->ic_newassoc(ni, newassoc); 2820 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2821 /* tell the authenticator about new station */ 2822 if (vap->iv_auth->ia_node_join != NULL) 2823 vap->iv_auth->ia_node_join(ni); 2824 ieee80211_notify_node_join(ni, 2825 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2826 } 2827 2828 static void 2829 disable_protection(struct ieee80211vap *vap) 2830 { 2831 struct ieee80211com *ic = vap->iv_ic; 2832 2833 KASSERT(vap->iv_nonerpsta == 0 && 2834 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2835 ("%d non ERP stations, flags 0x%x", vap->iv_nonerpsta, 2836 vap->iv_flags_ext)); 2837 2838 vap->iv_flags &= ~IEEE80211_F_USEPROT; 2839 /* XXX verify mode? */ 2840 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2841 vap->iv_flags |= IEEE80211_F_SHPREAMBLE; 2842 vap->iv_flags &= ~IEEE80211_F_USEBARKER; 2843 } 2844 ieee80211_vap_update_erp_protmode(vap); 2845 ieee80211_vap_update_preamble(vap); 2846 } 2847 2848 /* 2849 * Handle a station leaving an 11g network. 2850 */ 2851 static void 2852 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2853 { 2854 struct ieee80211com *ic = ni->ni_ic; 2855 struct ieee80211vap *vap = ni->ni_vap; 2856 2857 IEEE80211_LOCK_ASSERT(ic); 2858 2859 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2860 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2861 ic->ic_bsschan->ic_flags)); 2862 2863 /* 2864 * If a long slot station do the slot time bookkeeping. 2865 */ 2866 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2867 KASSERT(vap->iv_longslotsta > 0, 2868 ("bogus long slot station count %d", vap->iv_longslotsta)); 2869 vap->iv_longslotsta--; 2870 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2871 "long slot time station leaves, count now %d", 2872 vap->iv_longslotsta); 2873 /* 2874 * XXX TODO: this may need all VAPs checked! 2875 */ 2876 if (vap->iv_longslotsta == 0) { 2877 /* 2878 * Re-enable use of short slot time if supported 2879 * and not operating in IBSS mode (per spec). 2880 */ 2881 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2882 ic->ic_opmode != IEEE80211_M_IBSS) { 2883 IEEE80211_DPRINTF(ni->ni_vap, 2884 IEEE80211_MSG_ASSOC, 2885 "%s: re-enable use of short slot time\n", 2886 __func__); 2887 ieee80211_vap_set_shortslottime(vap, 1); 2888 } 2889 } 2890 } 2891 /* 2892 * If a non-ERP station do the protection-related bookkeeping. 2893 */ 2894 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2895 KASSERT(vap->iv_nonerpsta > 0, 2896 ("bogus non-ERP station count %d", vap->iv_nonerpsta)); 2897 vap->iv_nonerpsta--; 2898 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2899 "non-ERP station leaves, count now %d%s", vap->iv_nonerpsta, 2900 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2901 " (non-ERP sta present)" : ""); 2902 if (vap->iv_nonerpsta == 0 && 2903 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2904 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2905 "%s: disable use of protection\n", __func__); 2906 disable_protection(vap); 2907 } 2908 } 2909 } 2910 2911 /* 2912 * Time out presence of an overlapping bss with non-ERP 2913 * stations. When operating in hostap mode we listen for 2914 * beacons from other stations and if we identify a non-ERP 2915 * station is present we enable protection. To identify 2916 * when all non-ERP stations are gone we time out this 2917 * condition. 2918 */ 2919 static void 2920 ieee80211_vap_erp_timeout(struct ieee80211vap *vap) 2921 { 2922 2923 IEEE80211_LOCK_ASSERT(vap->iv_ic); 2924 2925 if ((vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2926 ieee80211_time_after(ticks, vap->iv_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2927 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 2928 "%s", "age out non-ERP sta present on channel"); 2929 vap->iv_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2930 if (vap->iv_nonerpsta == 0) 2931 disable_protection(vap); 2932 } 2933 } 2934 2935 /* 2936 * Handle bookkeeping for station deauthentication/disassociation 2937 * when operating as an ap. 2938 */ 2939 void 2940 ieee80211_node_leave(struct ieee80211_node *ni) 2941 { 2942 struct ieee80211com *ic = ni->ni_ic; 2943 struct ieee80211vap *vap = ni->ni_vap; 2944 struct ieee80211_node_table *nt = ni->ni_table; 2945 2946 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2947 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2948 2949 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2950 ("unexpected operating mode %u", vap->iv_opmode)); 2951 /* 2952 * If node wasn't previously associated all 2953 * we need to do is reclaim the reference. 2954 */ 2955 /* XXX ibss mode bypasses 11g and notification */ 2956 if (ni->ni_associd == 0) 2957 goto done; 2958 /* 2959 * Tell the authenticator the station is leaving. 2960 * Note that we must do this before yanking the 2961 * association id as the authenticator uses the 2962 * associd to locate it's state block. 2963 */ 2964 if (vap->iv_auth->ia_node_leave != NULL) 2965 vap->iv_auth->ia_node_leave(ni); 2966 2967 IEEE80211_LOCK(ic); 2968 IEEE80211_AID_CLR(vap, ni->ni_associd); 2969 vap->iv_sta_assoc--; 2970 2971 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2972 ieee80211_vht_node_leave(ni); 2973 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2974 ieee80211_ht_node_leave(ni); 2975 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2976 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2977 ieee80211_node_leave_11g(ni); 2978 IEEE80211_UNLOCK(ic); 2979 /* 2980 * Cleanup station state. In particular clear various 2981 * state that might otherwise be reused if the node 2982 * is reused before the reference count goes to zero 2983 * (and memory is reclaimed). 2984 */ 2985 ieee80211_sta_leave(ni); 2986 done: 2987 /* 2988 * Remove the node from any table it's recorded in and 2989 * drop the caller's reference. Removal from the table 2990 * is important to insure the node is not reprocessed 2991 * for inactivity. 2992 */ 2993 if (nt != NULL) { 2994 IEEE80211_NODE_LOCK(nt); 2995 node_reclaim(nt, ni); 2996 IEEE80211_NODE_UNLOCK(nt); 2997 } else 2998 ieee80211_free_node(ni); 2999 } 3000 3001 struct rssiinfo { 3002 int rssi_samples; 3003 uint32_t rssi_total; 3004 }; 3005 3006 static void 3007 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 3008 { 3009 struct rssiinfo *info = arg; 3010 struct ieee80211vap *vap = ni->ni_vap; 3011 int8_t rssi; 3012 3013 /* only associated stations */ 3014 if (ni->ni_associd == 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 static void 3024 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 3025 { 3026 struct rssiinfo *info = arg; 3027 struct ieee80211vap *vap = ni->ni_vap; 3028 int8_t rssi; 3029 3030 /* only neighbors */ 3031 /* XXX check bssid */ 3032 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 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 3041 #ifdef IEEE80211_SUPPORT_MESH 3042 static void 3043 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 3044 { 3045 struct rssiinfo *info = arg; 3046 struct ieee80211vap *vap = ni->ni_vap; 3047 int8_t rssi; 3048 3049 /* only neighbors that peered successfully */ 3050 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 3051 return; 3052 rssi = vap->iv_ic->ic_node_getrssi(ni); 3053 if (rssi != 0) { 3054 info->rssi_samples++; 3055 info->rssi_total += rssi; 3056 } 3057 } 3058 #endif /* IEEE80211_SUPPORT_MESH */ 3059 3060 int8_t 3061 ieee80211_getrssi(struct ieee80211vap *vap) 3062 { 3063 #define NZ(x) ((x) == 0 ? 1 : (x)) 3064 struct ieee80211com *ic = vap->iv_ic; 3065 struct rssiinfo info; 3066 3067 info.rssi_total = 0; 3068 info.rssi_samples = 0; 3069 switch (vap->iv_opmode) { 3070 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 3071 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 3072 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi, 3073 &info); 3074 break; 3075 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 3076 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi, 3077 &info); 3078 break; 3079 #ifdef IEEE80211_SUPPORT_MESH 3080 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 3081 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi, 3082 &info); 3083 break; 3084 #endif 3085 case IEEE80211_M_MONITOR: /* XXX */ 3086 case IEEE80211_M_STA: /* use stats from associated ap */ 3087 default: 3088 if (vap->iv_bss != NULL) 3089 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 3090 info.rssi_samples = 1; 3091 break; 3092 } 3093 return info.rssi_total / NZ(info.rssi_samples); 3094 #undef NZ 3095 } 3096 3097 void 3098 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 3099 { 3100 3101 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 3102 return; 3103 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 3104 /* for non-station mode return avg'd rssi accounting */ 3105 if (vap->iv_opmode != IEEE80211_M_STA) 3106 *rssi = ieee80211_getrssi(vap); 3107 } 3108