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 void node_cleanup(struct ieee80211_node *); 84 static void node_free(struct ieee80211_node *); 85 static void node_age(struct ieee80211_node *); 86 static int8_t node_getrssi(const struct ieee80211_node *); 87 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 88 static void node_getmimoinfo(const struct ieee80211_node *, 89 struct ieee80211_mimo_info *); 90 91 static void _ieee80211_free_node(struct ieee80211_node *); 92 93 static void node_reclaim(struct ieee80211_node_table *nt, 94 struct ieee80211_node *ni); 95 static void ieee80211_node_table_init(struct ieee80211com *ic, 96 struct ieee80211_node_table *nt, const char *name, 97 int inact, int keymaxix); 98 static void ieee80211_node_table_reset(struct ieee80211_node_table *, 99 struct ieee80211vap *); 100 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 101 static void ieee80211_erp_timeout(struct ieee80211com *); 102 103 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 104 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 105 106 void 107 ieee80211_node_attach(struct ieee80211com *ic) 108 { 109 /* XXX really want maxlen enforced per-sta */ 110 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 111 "802.11 staging q"); 112 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 113 IEEE80211_INACT_INIT, ic->ic_max_keyix); 114 callout_init(&ic->ic_inact, 1); 115 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 116 ieee80211_node_timeout, ic); 117 118 ic->ic_node_alloc = node_alloc; 119 ic->ic_node_free = node_free; 120 ic->ic_node_cleanup = node_cleanup; 121 ic->ic_node_age = node_age; 122 ic->ic_node_drain = node_age; /* NB: same as age */ 123 ic->ic_node_getrssi = node_getrssi; 124 ic->ic_node_getsignal = node_getsignal; 125 ic->ic_node_getmimoinfo = node_getmimoinfo; 126 127 /* 128 * Set flags to be propagated to all vap's; 129 * these define default behaviour/configuration. 130 */ 131 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 132 } 133 134 void 135 ieee80211_node_detach(struct ieee80211com *ic) 136 { 137 138 callout_drain(&ic->ic_inact); 139 ieee80211_node_table_cleanup(&ic->ic_sta); 140 ieee80211_ageq_drain(&ic->ic_stageq); 141 ieee80211_ageq_cleanup(&ic->ic_stageq); 142 } 143 144 void 145 ieee80211_node_vattach(struct ieee80211vap *vap) 146 { 147 /* NB: driver can override */ 148 vap->iv_max_aid = IEEE80211_AID_DEF; 149 150 /* default station inactivity timer setings */ 151 vap->iv_inact_init = IEEE80211_INACT_INIT; 152 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 153 vap->iv_inact_run = IEEE80211_INACT_RUN; 154 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 155 156 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 157 "%s: init %u auth %u run %u probe %u\n", __func__, 158 vap->iv_inact_init, vap->iv_inact_auth, 159 vap->iv_inact_run, vap->iv_inact_probe); 160 } 161 162 void 163 ieee80211_node_latevattach(struct ieee80211vap *vap) 164 { 165 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 166 /* XXX should we allow max aid to be zero? */ 167 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 168 vap->iv_max_aid = IEEE80211_AID_MIN; 169 if_printf(vap->iv_ifp, 170 "WARNING: max aid too small, changed to %d\n", 171 vap->iv_max_aid); 172 } 173 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( 174 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 175 M_80211_NODE, 176 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 177 if (vap->iv_aid_bitmap == NULL) { 178 /* XXX no way to recover */ 179 printf("%s: no memory for AID bitmap, max aid %d!\n", 180 __func__, vap->iv_max_aid); 181 vap->iv_max_aid = 0; 182 } 183 } 184 185 ieee80211_reset_bss(vap); 186 187 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 188 } 189 190 void 191 ieee80211_node_vdetach(struct ieee80211vap *vap) 192 { 193 struct ieee80211com *ic = vap->iv_ic; 194 195 ieee80211_node_table_reset(&ic->ic_sta, vap); 196 if (vap->iv_bss != NULL) { 197 ieee80211_free_node(vap->iv_bss); 198 vap->iv_bss = NULL; 199 } 200 if (vap->iv_aid_bitmap != NULL) { 201 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); 202 vap->iv_aid_bitmap = NULL; 203 } 204 } 205 206 /* 207 * Port authorize/unauthorize interfaces for use by an authenticator. 208 */ 209 210 void 211 ieee80211_node_authorize(struct ieee80211_node *ni) 212 { 213 struct ieee80211vap *vap = ni->ni_vap; 214 215 ni->ni_flags |= IEEE80211_NODE_AUTH; 216 ni->ni_inact_reload = vap->iv_inact_run; 217 ni->ni_inact = ni->ni_inact_reload; 218 219 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 220 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 221 } 222 223 void 224 ieee80211_node_unauthorize(struct ieee80211_node *ni) 225 { 226 struct ieee80211vap *vap = ni->ni_vap; 227 228 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 229 ni->ni_inact_reload = vap->iv_inact_auth; 230 if (ni->ni_inact > ni->ni_inact_reload) 231 ni->ni_inact = ni->ni_inact_reload; 232 233 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 234 "%s: inact_reload %u inact %u", __func__, 235 ni->ni_inact_reload, ni->ni_inact); 236 } 237 238 /* 239 * Fix tx parameters for a node according to ``association state''. 240 */ 241 void 242 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 243 { 244 struct ieee80211vap *vap = ni->ni_vap; 245 enum ieee80211_phymode mode; 246 247 if (ni->ni_flags & IEEE80211_NODE_VHT) { 248 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 249 mode = IEEE80211_MODE_VHT_5GHZ; 250 else 251 mode = IEEE80211_MODE_VHT_2GHZ; 252 } else if (ni->ni_flags & IEEE80211_NODE_HT) { 253 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 254 mode = IEEE80211_MODE_11NA; 255 else 256 mode = IEEE80211_MODE_11NG; 257 } else { /* legacy rate handling */ 258 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 259 mode = IEEE80211_MODE_STURBO_A; 260 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 261 mode = IEEE80211_MODE_HALF; 262 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 263 mode = IEEE80211_MODE_QUARTER; 264 /* NB: 108A should be handled as 11a */ 265 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 266 mode = IEEE80211_MODE_11A; 267 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 268 (ni->ni_flags & IEEE80211_NODE_ERP)) 269 mode = IEEE80211_MODE_11G; 270 else 271 mode = IEEE80211_MODE_11B; 272 } 273 ni->ni_txparms = &vap->iv_txparms[mode]; 274 } 275 276 /* 277 * Set/change the channel. The rate set is also updated as 278 * to insure a consistent view by drivers. 279 * XXX should be private but hostap needs it to deal with CSA 280 */ 281 void 282 ieee80211_node_set_chan(struct ieee80211_node *ni, 283 struct ieee80211_channel *chan) 284 { 285 struct ieee80211com *ic = ni->ni_ic; 286 struct ieee80211vap *vap = ni->ni_vap; 287 enum ieee80211_phymode mode; 288 289 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 290 291 ni->ni_chan = chan; 292 mode = ieee80211_chan2mode(chan); 293 if (IEEE80211_IS_CHAN_HT(chan)) { 294 /* 295 * We must install the legacy rate est in ni_rates and the 296 * HT rate set in ni_htrates. 297 */ 298 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 299 /* 300 * Setup bss tx parameters based on operating mode. We 301 * use legacy rates when operating in a mixed HT+non-HT bss 302 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 303 */ 304 if (mode == IEEE80211_MODE_11NA && 305 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 306 mode = IEEE80211_MODE_11A; 307 else if (mode == IEEE80211_MODE_11NG && 308 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 309 mode = IEEE80211_MODE_11G; 310 if (mode == IEEE80211_MODE_11G && 311 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 312 mode = IEEE80211_MODE_11B; 313 } 314 ni->ni_txparms = &vap->iv_txparms[mode]; 315 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 316 } 317 318 static __inline void 319 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 320 { 321 /* propagate useful state */ 322 nbss->ni_authmode = obss->ni_authmode; 323 nbss->ni_txpower = obss->ni_txpower; 324 nbss->ni_vlan = obss->ni_vlan; 325 /* XXX statistics? */ 326 /* XXX legacy WDS bssid? */ 327 } 328 329 void 330 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 331 { 332 struct ieee80211com *ic = vap->iv_ic; 333 struct ieee80211_node *ni; 334 335 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 336 "%s: creating %s on channel %u%c flags 0x%08x\n", __func__, 337 ieee80211_opmode_name[vap->iv_opmode], 338 ieee80211_chan2ieee(ic, chan), 339 ieee80211_channel_type_char(chan), 340 chan->ic_flags); 341 342 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 343 if (ni == NULL) { 344 /* XXX recovery? */ 345 return; 346 } 347 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 348 ni->ni_esslen = vap->iv_des_ssid[0].len; 349 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 350 if (vap->iv_bss != NULL) 351 copy_bss(ni, vap->iv_bss); 352 ni->ni_intval = ic->ic_bintval; 353 if (vap->iv_flags & IEEE80211_F_PRIVACY) 354 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 355 if (ic->ic_phytype == IEEE80211_T_FH) { 356 ni->ni_fhdwell = 200; /* XXX */ 357 ni->ni_fhindex = 1; 358 } 359 if (vap->iv_opmode == IEEE80211_M_IBSS) { 360 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 361 if (vap->iv_flags & IEEE80211_F_DESBSSID) 362 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 363 else { 364 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 365 /* clear group bit, add local bit */ 366 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 367 } 368 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 369 if (vap->iv_flags & IEEE80211_F_DESBSSID) 370 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 371 else 372 #ifdef IEEE80211_SUPPORT_TDMA 373 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 374 #endif 375 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 376 #ifdef IEEE80211_SUPPORT_MESH 377 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 378 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 379 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 380 #endif 381 } 382 /* 383 * Fix the channel and related attributes. 384 */ 385 /* clear DFS CAC state on previous channel */ 386 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 387 ic->ic_bsschan->ic_freq != chan->ic_freq && 388 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 389 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 390 ic->ic_bsschan = chan; 391 ieee80211_node_set_chan(ni, chan); 392 ic->ic_curmode = ieee80211_chan2mode(chan); 393 /* 394 * Do mode-specific setup. 395 */ 396 if (IEEE80211_IS_CHAN_FULL(chan)) { 397 if (IEEE80211_IS_CHAN_ANYG(chan)) { 398 /* 399 * Use a mixed 11b/11g basic rate set. 400 */ 401 ieee80211_setbasicrates(&ni->ni_rates, 402 IEEE80211_MODE_11G); 403 if (vap->iv_flags & IEEE80211_F_PUREG) { 404 /* 405 * Also mark OFDM rates basic so 11b 406 * stations do not join (WiFi compliance). 407 */ 408 ieee80211_addbasicrates(&ni->ni_rates, 409 IEEE80211_MODE_11A); 410 } 411 } else if (IEEE80211_IS_CHAN_B(chan)) { 412 /* 413 * Force pure 11b rate set. 414 */ 415 ieee80211_setbasicrates(&ni->ni_rates, 416 IEEE80211_MODE_11B); 417 } 418 } 419 420 /* XXX TODO: other bits and pieces - eg fast-frames? */ 421 422 /* If we're an 11n channel then initialise the 11n bits */ 423 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { 424 /* XXX what else? */ 425 ieee80211_ht_node_init(ni); 426 ieee80211_vht_node_init(ni); 427 } else if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 428 /* XXX what else? */ 429 ieee80211_ht_node_init(ni); 430 } 431 432 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 433 } 434 435 /* 436 * Reset bss state on transition to the INIT state. 437 * Clear any stations from the table (they have been 438 * deauth'd) and reset the bss node (clears key, rate 439 * etc. state). 440 */ 441 void 442 ieee80211_reset_bss(struct ieee80211vap *vap) 443 { 444 struct ieee80211com *ic = vap->iv_ic; 445 struct ieee80211_node *ni, *obss; 446 447 ieee80211_node_table_reset(&ic->ic_sta, vap); 448 /* XXX multi-bss: wrong */ 449 ieee80211_reset_erp(ic); 450 451 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 452 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 453 obss = vap->iv_bss; 454 vap->iv_bss = ieee80211_ref_node(ni); 455 if (obss != NULL) { 456 copy_bss(ni, obss); 457 ni->ni_intval = ic->ic_bintval; 458 ieee80211_free_node(obss); 459 } else 460 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 461 } 462 463 static int 464 match_ssid(const struct ieee80211_node *ni, 465 int nssid, const struct ieee80211_scan_ssid ssids[]) 466 { 467 int i; 468 469 for (i = 0; i < nssid; i++) { 470 if (ni->ni_esslen == ssids[i].len && 471 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 472 return 1; 473 } 474 return 0; 475 } 476 477 /* 478 * Test a node for suitability/compatibility. 479 */ 480 static int 481 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 482 { 483 struct ieee80211com *ic = ni->ni_ic; 484 uint8_t rate; 485 486 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 487 return 0; 488 if (vap->iv_opmode == IEEE80211_M_IBSS) { 489 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 490 return 0; 491 } else { 492 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 493 return 0; 494 } 495 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 496 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 497 return 0; 498 } else { 499 /* XXX does this mean privacy is supported or required? */ 500 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 501 return 0; 502 } 503 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 504 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 505 if (rate & IEEE80211_RATE_BASIC) 506 return 0; 507 if (vap->iv_des_nssid != 0 && 508 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 509 return 0; 510 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 511 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 512 return 0; 513 return 1; 514 } 515 516 #ifdef IEEE80211_DEBUG 517 /* 518 * Display node suitability/compatibility. 519 */ 520 static void 521 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 522 { 523 struct ieee80211com *ic = ni->ni_ic; 524 uint8_t rate; 525 int fail; 526 527 fail = 0; 528 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 529 fail |= 0x01; 530 if (vap->iv_opmode == IEEE80211_M_IBSS) { 531 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 532 fail |= 0x02; 533 } else { 534 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 535 fail |= 0x02; 536 } 537 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 538 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 539 fail |= 0x04; 540 } else { 541 /* XXX does this mean privacy is supported or required? */ 542 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 543 fail |= 0x04; 544 } 545 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 546 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 547 if (rate & IEEE80211_RATE_BASIC) 548 fail |= 0x08; 549 if (vap->iv_des_nssid != 0 && 550 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 551 fail |= 0x10; 552 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 553 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 554 fail |= 0x20; 555 556 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 557 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 558 printf(" %3d%c", 559 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 560 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 561 fail & 0x08 ? '!' : ' '); 562 printf(" %4s%c", 563 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 564 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 565 "????", 566 fail & 0x02 ? '!' : ' '); 567 printf(" %3s%c ", 568 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 569 fail & 0x04 ? '!' : ' '); 570 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 571 printf("%s\n", fail & 0x10 ? "!" : ""); 572 } 573 #endif /* IEEE80211_DEBUG */ 574 575 576 int 577 ieee80211_ibss_merge_check(struct ieee80211_node *ni) 578 { 579 struct ieee80211vap *vap = ni->ni_vap; 580 581 if (ni == vap->iv_bss || 582 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 583 /* unchanged, nothing to do */ 584 return 0; 585 } 586 587 if (!check_bss(vap, ni)) { 588 /* capabilities mismatch */ 589 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 590 "%s: merge failed, capabilities mismatch\n", __func__); 591 #ifdef IEEE80211_DEBUG 592 if (ieee80211_msg_assoc(vap)) 593 check_bss_debug(vap, ni); 594 #endif 595 vap->iv_stats.is_ibss_capmismatch++; 596 return 0; 597 } 598 599 return 1; 600 } 601 602 /* 603 * Check if the given node should populate the node table. 604 * 605 * We need to be in "see all beacons for all ssids" mode in order 606 * to do IBSS merges, however this means we will populate nodes for 607 * /all/ IBSS SSIDs, versus just the one we care about. 608 * 609 * So this check ensures the node can actually belong to our IBSS 610 * configuration. For now it simply checks the SSID. 611 */ 612 int 613 ieee80211_ibss_node_check_new(struct ieee80211_node *ni, 614 const struct ieee80211_scanparams *scan) 615 { 616 struct ieee80211vap *vap = ni->ni_vap; 617 int i; 618 619 /* 620 * If we have no SSID and no scan SSID, return OK. 621 */ 622 if (vap->iv_des_nssid == 0 && scan->ssid == NULL) 623 goto ok; 624 625 /* 626 * If we have one of (SSID, scan SSID) then return error. 627 */ 628 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL)) 629 goto mismatch; 630 631 /* 632 * Double-check - we need scan SSID. 633 */ 634 if (scan->ssid == NULL) 635 goto mismatch; 636 637 /* 638 * Check if the scan SSID matches the SSID list for the VAP. 639 */ 640 for (i = 0; i < vap->iv_des_nssid; i++) { 641 642 /* Sanity length check */ 643 if (vap->iv_des_ssid[i].len != scan->ssid[1]) 644 continue; 645 646 /* Note: SSID in the scan entry is the IE format */ 647 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2, 648 vap->iv_des_ssid[i].len) == 0) 649 goto ok; 650 } 651 652 mismatch: 653 return (0); 654 ok: 655 return (1); 656 } 657 658 /* 659 * Handle 802.11 ad hoc network merge. The 660 * convention, set by the Wireless Ethernet Compatibility Alliance 661 * (WECA), is that an 802.11 station will change its BSSID to match 662 * the "oldest" 802.11 ad hoc network, on the same channel, that 663 * has the station's desired SSID. The "oldest" 802.11 network 664 * sends beacons with the greatest TSF timestamp. 665 * 666 * The caller is assumed to validate TSF's before attempting a merge. 667 * 668 * Return !0 if the BSSID changed, 0 otherwise. 669 */ 670 int 671 ieee80211_ibss_merge(struct ieee80211_node *ni) 672 { 673 #ifdef IEEE80211_DEBUG 674 struct ieee80211vap *vap = ni->ni_vap; 675 struct ieee80211com *ic = ni->ni_ic; 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 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 685 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 686 ic->ic_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_reset_erp(ic); 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 /* 1078 * Initialize an ie blob with the specified data. If previous 1079 * data exists re-use the data block. As a side effect we clear 1080 * all references to specific ie's; the caller is required to 1081 * recalculate them. 1082 */ 1083 int 1084 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 1085 { 1086 /* NB: assumes data+len are the last fields */ 1087 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 1088 if (ies->data != NULL && ies->len != len) { 1089 /* data size changed */ 1090 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1091 ies->data = NULL; 1092 } 1093 if (ies->data == NULL) { 1094 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 1095 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1096 if (ies->data == NULL) { 1097 ies->len = 0; 1098 /* NB: pointers have already been zero'd above */ 1099 return 0; 1100 } 1101 } 1102 memcpy(ies->data, data, len); 1103 ies->len = len; 1104 return 1; 1105 } 1106 1107 /* 1108 * Reclaim storage for an ie blob. 1109 */ 1110 void 1111 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 1112 { 1113 if (ies->data != NULL) 1114 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1115 } 1116 1117 /* 1118 * Expand an ie blob data contents and to fillin individual 1119 * ie pointers. The data blob is assumed to be well-formed; 1120 * we don't do any validity checking of ie lengths. 1121 */ 1122 void 1123 ieee80211_ies_expand(struct ieee80211_ies *ies) 1124 { 1125 uint8_t *ie; 1126 int ielen; 1127 1128 ie = ies->data; 1129 ielen = ies->len; 1130 while (ielen > 0) { 1131 switch (ie[0]) { 1132 case IEEE80211_ELEMID_VENDOR: 1133 if (iswpaoui(ie)) 1134 ies->wpa_ie = ie; 1135 else if (iswmeoui(ie)) 1136 ies->wme_ie = ie; 1137 #ifdef IEEE80211_SUPPORT_SUPERG 1138 else if (isatherosoui(ie)) 1139 ies->ath_ie = ie; 1140 #endif 1141 #ifdef IEEE80211_SUPPORT_TDMA 1142 else if (istdmaoui(ie)) 1143 ies->tdma_ie = ie; 1144 #endif 1145 break; 1146 case IEEE80211_ELEMID_RSN: 1147 ies->rsn_ie = ie; 1148 break; 1149 case IEEE80211_ELEMID_HTCAP: 1150 ies->htcap_ie = ie; 1151 break; 1152 case IEEE80211_ELEMID_HTINFO: 1153 ies->htinfo_ie = ie; 1154 break; 1155 #ifdef IEEE80211_SUPPORT_MESH 1156 case IEEE80211_ELEMID_MESHID: 1157 ies->meshid_ie = ie; 1158 break; 1159 #endif 1160 case IEEE80211_ELEMID_VHT_CAP: 1161 ies->vhtcap_ie = ie; 1162 break; 1163 case IEEE80211_ELEMID_VHT_OPMODE: 1164 ies->vhtopmode_ie = ie; 1165 break; 1166 case IEEE80211_ELEMID_VHT_PWR_ENV: 1167 ies->vhtpwrenv_ie = ie; 1168 break; 1169 case IEEE80211_ELEMID_BSSLOAD: 1170 ies->bssload_ie = ie; 1171 break; 1172 case IEEE80211_ELEMID_APCHANREP: 1173 ies->apchanrep_ie = ie; 1174 break; 1175 } 1176 ielen -= 2 + ie[1]; 1177 ie += 2 + ie[1]; 1178 } 1179 } 1180 1181 /* 1182 * Reclaim any resources in a node and reset any critical 1183 * state. Typically nodes are free'd immediately after, 1184 * but in some cases the storage may be reused so we need 1185 * to insure consistent state (should probably fix that). 1186 */ 1187 static void 1188 node_cleanup(struct ieee80211_node *ni) 1189 { 1190 struct ieee80211vap *vap = ni->ni_vap; 1191 struct ieee80211com *ic = ni->ni_ic; 1192 int i; 1193 1194 /* NB: preserve ni_table */ 1195 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1196 if (vap->iv_opmode != IEEE80211_M_STA) 1197 vap->iv_ps_sta--; 1198 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1199 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1200 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1201 } 1202 /* 1203 * Cleanup any VHT and HT-related state. 1204 */ 1205 if (ni->ni_flags & IEEE80211_NODE_VHT) 1206 ieee80211_vht_node_cleanup(ni); 1207 if (ni->ni_flags & IEEE80211_NODE_HT) 1208 ieee80211_ht_node_cleanup(ni); 1209 #ifdef IEEE80211_SUPPORT_SUPERG 1210 /* Always do FF node cleanup; for A-MSDU */ 1211 ieee80211_ff_node_cleanup(ni); 1212 #endif 1213 #ifdef IEEE80211_SUPPORT_MESH 1214 /* 1215 * Cleanup any mesh-related state. 1216 */ 1217 if (vap->iv_opmode == IEEE80211_M_MBSS) 1218 ieee80211_mesh_node_cleanup(ni); 1219 #endif 1220 /* 1221 * Clear any staging queue entries. 1222 */ 1223 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1224 1225 /* 1226 * Clear AREF flag that marks the authorization refcnt bump 1227 * has happened. This is probably not needed as the node 1228 * should always be removed from the table so not found but 1229 * do it just in case. 1230 * Likewise clear the ASSOCID flag as these flags are intended 1231 * to be managed in tandem. 1232 */ 1233 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1234 1235 /* 1236 * Drain power save queue and, if needed, clear TIM. 1237 */ 1238 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1239 vap->iv_set_tim(ni, 0); 1240 1241 ni->ni_associd = 0; 1242 if (ni->ni_challenge != NULL) { 1243 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1244 ni->ni_challenge = NULL; 1245 } 1246 /* 1247 * Preserve SSID, WPA, and WME ie's so the bss node is 1248 * reusable during a re-auth/re-assoc state transition. 1249 * If we remove these data they will not be recreated 1250 * because they come from a probe-response or beacon frame 1251 * which cannot be expected prior to the association-response. 1252 * This should not be an issue when operating in other modes 1253 * as stations leaving always go through a full state transition 1254 * which will rebuild this state. 1255 * 1256 * XXX does this leave us open to inheriting old state? 1257 */ 1258 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1259 if (ni->ni_rxfrag[i] != NULL) { 1260 m_freem(ni->ni_rxfrag[i]); 1261 ni->ni_rxfrag[i] = NULL; 1262 } 1263 /* 1264 * Must be careful here to remove any key map entry w/o a LOR. 1265 */ 1266 ieee80211_node_delucastkey(ni); 1267 } 1268 1269 static void 1270 node_free(struct ieee80211_node *ni) 1271 { 1272 struct ieee80211com *ic = ni->ni_ic; 1273 1274 ieee80211_ratectl_node_deinit(ni); 1275 ic->ic_node_cleanup(ni); 1276 ieee80211_ies_cleanup(&ni->ni_ies); 1277 ieee80211_psq_cleanup(&ni->ni_psq); 1278 IEEE80211_FREE(ni, M_80211_NODE); 1279 } 1280 1281 static void 1282 node_age(struct ieee80211_node *ni) 1283 { 1284 struct ieee80211vap *vap = ni->ni_vap; 1285 1286 /* 1287 * Age frames on the power save queue. 1288 */ 1289 if (ieee80211_node_psq_age(ni) != 0 && 1290 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1291 vap->iv_set_tim(ni, 0); 1292 /* 1293 * Age out HT resources (e.g. frames on the 1294 * A-MPDU reorder queues). 1295 */ 1296 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1297 ieee80211_ht_node_age(ni); 1298 } 1299 1300 static int8_t 1301 node_getrssi(const struct ieee80211_node *ni) 1302 { 1303 uint32_t avgrssi = ni->ni_avgrssi; 1304 int32_t rssi; 1305 1306 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1307 return 0; 1308 rssi = IEEE80211_RSSI_GET(avgrssi); 1309 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1310 } 1311 1312 static void 1313 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1314 { 1315 *rssi = node_getrssi(ni); 1316 *noise = ni->ni_noise; 1317 } 1318 1319 static void 1320 node_getmimoinfo(const struct ieee80211_node *ni, 1321 struct ieee80211_mimo_info *info) 1322 { 1323 int i; 1324 uint32_t avgrssi; 1325 int32_t rssi; 1326 1327 bzero(info, sizeof(*info)); 1328 1329 for (i = 0; i < MIN(IEEE80211_MAX_CHAINS, ni->ni_mimo_chains); i++) { 1330 /* Note: for now, just pri20 channel info */ 1331 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1332 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1333 info->ch[i].rssi[0] = 0; 1334 } else { 1335 rssi = IEEE80211_RSSI_GET(avgrssi); 1336 info->ch[i].rssi[0] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1337 } 1338 info->ch[i].noise[0] = ni->ni_mimo_noise_ctl[i]; 1339 } 1340 1341 /* XXX ext radios? */ 1342 1343 /* XXX EVM? */ 1344 } 1345 1346 static void 1347 ieee80211_add_node_nt(struct ieee80211_node_table *nt, 1348 struct ieee80211_node *ni) 1349 { 1350 struct ieee80211com *ic = nt->nt_ic; 1351 int hash; 1352 1353 IEEE80211_NODE_LOCK_ASSERT(nt); 1354 1355 hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr); 1356 (void) ic; /* XXX IEEE80211_NODE_HASH */ 1357 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1358 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1359 nt->nt_count++; 1360 ni->ni_table = nt; 1361 } 1362 1363 static void 1364 ieee80211_del_node_nt(struct ieee80211_node_table *nt, 1365 struct ieee80211_node *ni) 1366 { 1367 1368 IEEE80211_NODE_LOCK_ASSERT(nt); 1369 1370 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1371 LIST_REMOVE(ni, ni_hash); 1372 nt->nt_count--; 1373 KASSERT(nt->nt_count >= 0, 1374 ("nt_count is negative (%d)!\n", nt->nt_count)); 1375 ni->ni_table = NULL; 1376 } 1377 1378 struct ieee80211_node * 1379 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1380 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1381 { 1382 struct ieee80211com *ic = nt->nt_ic; 1383 struct ieee80211_node *ni; 1384 1385 ni = ic->ic_node_alloc(vap, macaddr); 1386 if (ni == NULL) { 1387 vap->iv_stats.is_rx_nodealloc++; 1388 return NULL; 1389 } 1390 1391 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1392 "%s %p<%s> in %s table\n", __func__, ni, 1393 ether_sprintf(macaddr), nt->nt_name); 1394 1395 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1396 ieee80211_node_initref(ni); /* mark referenced */ 1397 ni->ni_chan = IEEE80211_CHAN_ANYC; 1398 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1399 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1400 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1401 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1402 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1403 ni->ni_inact_reload = nt->nt_inact_init; 1404 ni->ni_inact = ni->ni_inact_reload; 1405 ni->ni_ath_defkeyix = 0x7fff; 1406 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1407 #ifdef IEEE80211_SUPPORT_MESH 1408 if (vap->iv_opmode == IEEE80211_M_MBSS) 1409 ieee80211_mesh_node_init(vap, ni); 1410 #endif 1411 IEEE80211_NODE_LOCK(nt); 1412 ieee80211_add_node_nt(nt, ni); 1413 ni->ni_vap = vap; 1414 ni->ni_ic = ic; 1415 IEEE80211_NODE_UNLOCK(nt); 1416 1417 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1418 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1419 1420 ieee80211_ratectl_node_init(ni); 1421 1422 return ni; 1423 } 1424 1425 /* 1426 * Craft a temporary node suitable for sending a management frame 1427 * to the specified station. We craft only as much state as we 1428 * need to do the work since the node will be immediately reclaimed 1429 * once the send completes. 1430 */ 1431 struct ieee80211_node * 1432 ieee80211_tmp_node(struct ieee80211vap *vap, 1433 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1434 { 1435 struct ieee80211com *ic = vap->iv_ic; 1436 struct ieee80211_node *ni; 1437 1438 ni = ic->ic_node_alloc(vap, macaddr); 1439 if (ni != NULL) { 1440 struct ieee80211_node *bss = vap->iv_bss; 1441 1442 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1443 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1444 1445 ni->ni_table = NULL; /* NB: pedantic */ 1446 ni->ni_ic = ic; /* NB: needed to set channel */ 1447 ni->ni_vap = vap; 1448 1449 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1450 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1451 ieee80211_node_initref(ni); /* mark referenced */ 1452 /* NB: required by ieee80211_fix_rate */ 1453 ieee80211_node_set_chan(ni, bss->ni_chan); 1454 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1455 IEEE80211_KEYIX_NONE); 1456 ni->ni_txpower = bss->ni_txpower; 1457 /* XXX optimize away */ 1458 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1459 1460 ieee80211_ratectl_node_init(ni); 1461 } else { 1462 /* XXX msg */ 1463 vap->iv_stats.is_rx_nodealloc++; 1464 } 1465 return ni; 1466 } 1467 1468 struct ieee80211_node * 1469 ieee80211_dup_bss(struct ieee80211vap *vap, 1470 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1471 { 1472 struct ieee80211com *ic = vap->iv_ic; 1473 struct ieee80211_node *ni; 1474 1475 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1476 if (ni != NULL) { 1477 struct ieee80211_node *bss = vap->iv_bss; 1478 /* 1479 * Inherit from iv_bss. 1480 */ 1481 copy_bss(ni, bss); 1482 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1483 ieee80211_node_set_chan(ni, bss->ni_chan); 1484 } 1485 return ni; 1486 } 1487 1488 /* 1489 * Create a bss node for a legacy WDS vap. The far end does 1490 * not associate so we just create create a new node and 1491 * simulate an association. The caller is responsible for 1492 * installing the node as the bss node and handling any further 1493 * setup work like authorizing the port. 1494 */ 1495 struct ieee80211_node * 1496 ieee80211_node_create_wds(struct ieee80211vap *vap, 1497 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1498 { 1499 struct ieee80211com *ic = vap->iv_ic; 1500 struct ieee80211_node *ni; 1501 1502 /* XXX check if node already in sta table? */ 1503 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1504 if (ni != NULL) { 1505 ni->ni_wdsvap = vap; 1506 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1507 /* 1508 * Inherit any manually configured settings. 1509 */ 1510 copy_bss(ni, vap->iv_bss); 1511 ieee80211_node_set_chan(ni, chan); 1512 /* NB: propagate ssid so available to WPA supplicant */ 1513 ni->ni_esslen = vap->iv_des_ssid[0].len; 1514 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1515 /* NB: no associd for peer */ 1516 /* 1517 * There are no management frames to use to 1518 * discover neighbor capabilities, so blindly 1519 * propagate the local configuration. 1520 */ 1521 if (vap->iv_flags & IEEE80211_F_WME) 1522 ni->ni_flags |= IEEE80211_NODE_QOS; 1523 #ifdef IEEE80211_SUPPORT_SUPERG 1524 if (vap->iv_flags & IEEE80211_F_FF) 1525 ni->ni_flags |= IEEE80211_NODE_FF; 1526 #endif 1527 /* XXX VHT */ 1528 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1529 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1530 /* 1531 * Device is HT-capable and HT is enabled for 1532 * the vap; setup HT operation. On return 1533 * ni_chan will be adjusted to an HT channel. 1534 */ 1535 ieee80211_ht_wds_init(ni); 1536 if (vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1537 printf("%s: TODO: vht_wds_init\n", __func__); 1538 } 1539 } else { 1540 struct ieee80211_channel *c = ni->ni_chan; 1541 /* 1542 * Force a legacy channel to be used. 1543 */ 1544 c = ieee80211_find_channel(ic, 1545 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1546 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1547 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1548 ni->ni_chan = c; 1549 } 1550 } 1551 return ni; 1552 } 1553 1554 struct ieee80211_node * 1555 #ifdef IEEE80211_DEBUG_REFCNT 1556 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1557 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1558 #else 1559 ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1560 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1561 #endif 1562 { 1563 struct ieee80211_node *ni; 1564 int hash; 1565 1566 IEEE80211_NODE_LOCK_ASSERT(nt); 1567 1568 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1569 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1570 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1571 ieee80211_ref_node(ni); /* mark referenced */ 1572 #ifdef IEEE80211_DEBUG_REFCNT 1573 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1574 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1575 func, line, 1576 ni, ether_sprintf(ni->ni_macaddr), 1577 ieee80211_node_refcnt(ni)); 1578 #endif 1579 return ni; 1580 } 1581 } 1582 return NULL; 1583 } 1584 1585 struct ieee80211_node * 1586 #ifdef IEEE80211_DEBUG_REFCNT 1587 ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1588 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1589 #else 1590 ieee80211_find_node(struct ieee80211_node_table *nt, 1591 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1592 #endif 1593 { 1594 struct ieee80211_node *ni; 1595 1596 IEEE80211_NODE_LOCK(nt); 1597 ni = ieee80211_find_node_locked(nt, macaddr); 1598 IEEE80211_NODE_UNLOCK(nt); 1599 return ni; 1600 } 1601 1602 struct ieee80211_node * 1603 #ifdef IEEE80211_DEBUG_REFCNT 1604 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1605 const struct ieee80211vap *vap, 1606 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1607 #else 1608 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1609 const struct ieee80211vap *vap, 1610 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1611 #endif 1612 { 1613 struct ieee80211_node *ni; 1614 int hash; 1615 1616 IEEE80211_NODE_LOCK_ASSERT(nt); 1617 1618 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1619 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1620 if (ni->ni_vap == vap && 1621 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1622 ieee80211_ref_node(ni); /* mark referenced */ 1623 #ifdef IEEE80211_DEBUG_REFCNT 1624 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1625 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1626 func, line, 1627 ni, ether_sprintf(ni->ni_macaddr), 1628 ieee80211_node_refcnt(ni)); 1629 #endif 1630 return ni; 1631 } 1632 } 1633 return NULL; 1634 } 1635 1636 struct ieee80211_node * 1637 #ifdef IEEE80211_DEBUG_REFCNT 1638 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1639 const struct ieee80211vap *vap, 1640 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1641 #else 1642 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1643 const struct ieee80211vap *vap, 1644 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1645 #endif 1646 { 1647 struct ieee80211_node *ni; 1648 1649 IEEE80211_NODE_LOCK(nt); 1650 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1651 IEEE80211_NODE_UNLOCK(nt); 1652 return ni; 1653 } 1654 1655 /* 1656 * Fake up a node; this handles node discovery in adhoc mode. 1657 * Note that for the driver's benefit we we treat this like 1658 * an association so the driver has an opportunity to setup 1659 * it's private state. 1660 */ 1661 struct ieee80211_node * 1662 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1663 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1664 { 1665 struct ieee80211_node *ni; 1666 1667 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1668 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1669 ni = ieee80211_dup_bss(vap, macaddr); 1670 if (ni != NULL) { 1671 struct ieee80211com *ic = vap->iv_ic; 1672 1673 /* XXX no rate negotiation; just dup */ 1674 ni->ni_rates = vap->iv_bss->ni_rates; 1675 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1676 ni->ni_flags |= IEEE80211_NODE_ERP; 1677 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1678 /* 1679 * In adhoc demo mode there are no management 1680 * frames to use to discover neighbor capabilities, 1681 * so blindly propagate the local configuration 1682 * so we can do interesting things (e.g. use 1683 * WME to disable ACK's). 1684 */ 1685 /* 1686 * XXX TODO: 11n? 1687 */ 1688 if (vap->iv_flags & IEEE80211_F_WME) 1689 ni->ni_flags |= IEEE80211_NODE_QOS; 1690 #ifdef IEEE80211_SUPPORT_SUPERG 1691 if (vap->iv_flags & IEEE80211_F_FF) 1692 ni->ni_flags |= IEEE80211_NODE_FF; 1693 #endif 1694 } 1695 ieee80211_node_setuptxparms(ni); 1696 ieee80211_ratectl_node_init(ni); 1697 1698 /* 1699 * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX, 1700 * not A-MPDU TX; not 11n rates, etc. We'll cycle 1701 * that after we hear that we can indeed do 11n 1702 * (either by a beacon frame or by a probe response.) 1703 */ 1704 1705 /* 1706 * This is the first time we see the node. 1707 */ 1708 if (ic->ic_newassoc != NULL) 1709 ic->ic_newassoc(ni, 1); 1710 1711 /* 1712 * Kick off a probe request to the given node; 1713 * we will then use the probe response to update 1714 * 11n/etc configuration state. 1715 * 1716 * XXX TODO: this isn't guaranteed, and until we get 1717 * a probe response, we won't be able to actually 1718 * do anything 802.11n related to the node. 1719 * So if this does indeed work, maybe we should hold 1720 * off on sending responses until we get the probe 1721 * response, or just default to some sensible subset 1722 * of 802.11n behaviour (eg always allow aggregation 1723 * negotiation TO us, but not FROM us, etc) so we 1724 * aren't entirely busted. 1725 */ 1726 if (vap->iv_opmode == IEEE80211_M_IBSS) { 1727 ieee80211_send_probereq(ni, /* node */ 1728 vap->iv_myaddr, /* SA */ 1729 ni->ni_macaddr, /* DA */ 1730 vap->iv_bss->ni_bssid, /* BSSID */ 1731 vap->iv_bss->ni_essid, 1732 vap->iv_bss->ni_esslen); /* SSID */ 1733 } 1734 1735 /* XXX not right for 802.1x/WPA */ 1736 ieee80211_node_authorize(ni); 1737 } 1738 return ni; 1739 } 1740 1741 void 1742 ieee80211_init_neighbor(struct ieee80211_node *ni, 1743 const struct ieee80211_frame *wh, 1744 const struct ieee80211_scanparams *sp) 1745 { 1746 int do_ht_setup = 0, do_vht_setup = 0; 1747 1748 ni->ni_esslen = sp->ssid[1]; 1749 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1750 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1751 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1752 ni->ni_intval = sp->bintval; 1753 ni->ni_capinfo = sp->capinfo; 1754 ni->ni_chan = ni->ni_ic->ic_curchan; 1755 ni->ni_fhdwell = sp->fhdwell; 1756 ni->ni_fhindex = sp->fhindex; 1757 ni->ni_erp = sp->erp; 1758 ni->ni_timoff = sp->timoff; 1759 #ifdef IEEE80211_SUPPORT_MESH 1760 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1761 ieee80211_mesh_init_neighbor(ni, wh, sp); 1762 #endif 1763 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1764 ieee80211_ies_expand(&ni->ni_ies); 1765 if (ni->ni_ies.wme_ie != NULL) 1766 ni->ni_flags |= IEEE80211_NODE_QOS; 1767 else 1768 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1769 #ifdef IEEE80211_SUPPORT_SUPERG 1770 if (ni->ni_ies.ath_ie != NULL) 1771 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1772 #endif 1773 if (ni->ni_ies.htcap_ie != NULL) 1774 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1775 if (ni->ni_ies.htinfo_ie != NULL) 1776 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1777 1778 if (ni->ni_ies.vhtcap_ie != NULL) 1779 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 1780 if (ni->ni_ies.vhtopmode_ie != NULL) 1781 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 1782 1783 if ((ni->ni_ies.htcap_ie != NULL) && 1784 (ni->ni_ies.htinfo_ie != NULL) && 1785 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1786 do_ht_setup = 1; 1787 } 1788 1789 if ((ni->ni_ies.vhtcap_ie != NULL) && 1790 (ni->ni_ies.vhtopmode_ie != NULL) && 1791 (ni->ni_vap->iv_flags_vht & IEEE80211_FVHT_VHT)) { 1792 do_vht_setup = 1; 1793 } 1794 1795 } 1796 1797 /* NB: must be after ni_chan is setup */ 1798 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1799 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1800 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1801 1802 /* 1803 * If the neighbor is HT compatible, flip that on. 1804 */ 1805 if (do_ht_setup) { 1806 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1807 "%s: doing HT setup\n", __func__); 1808 ieee80211_ht_node_init(ni); 1809 ieee80211_ht_updateparams(ni, 1810 ni->ni_ies.htcap_ie, 1811 ni->ni_ies.htinfo_ie); 1812 1813 if (do_vht_setup) { 1814 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1815 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1816 __func__, 1817 ni->ni_macaddr, 1818 ":"); 1819 } else { 1820 ieee80211_vht_node_init(ni); 1821 ieee80211_vht_updateparams(ni, 1822 ni->ni_ies.vhtcap_ie, 1823 ni->ni_ies.vhtopmode_ie); 1824 ieee80211_setup_vht_rates(ni, 1825 ni->ni_ies.vhtcap_ie, 1826 ni->ni_ies.vhtopmode_ie); 1827 } 1828 } 1829 1830 /* 1831 * Finally do the channel upgrade/change based 1832 * on the HT/VHT configuration. 1833 */ 1834 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1835 ni->ni_ies.htinfo_ie); 1836 ieee80211_setup_htrates(ni, 1837 ni->ni_ies.htcap_ie, 1838 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1839 ieee80211_setup_basic_htrates(ni, 1840 ni->ni_ies.htinfo_ie); 1841 1842 ieee80211_node_setuptxparms(ni); 1843 ieee80211_ratectl_node_init(ni); 1844 1845 /* Reassociate; we're now 11n/11ac */ 1846 /* 1847 * XXX TODO: this is the wrong thing to do - 1848 * we're calling it with isnew=1 so the ath(4) 1849 * driver reinitialises the rate tables. 1850 * This "mostly" works for ath(4), but it won't 1851 * be right for firmware devices which allocate 1852 * node states. 1853 * 1854 * So, do we just create a new node and delete 1855 * the old one? Or? 1856 */ 1857 if (ni->ni_ic->ic_newassoc) 1858 ni->ni_ic->ic_newassoc(ni, 1); 1859 } 1860 } 1861 1862 /* 1863 * Do node discovery in adhoc mode on receipt of a beacon 1864 * or probe response frame. Note that for the driver's 1865 * benefit we we treat this like an association so the 1866 * driver has an opportunity to setup it's private state. 1867 */ 1868 struct ieee80211_node * 1869 ieee80211_add_neighbor(struct ieee80211vap *vap, 1870 const struct ieee80211_frame *wh, 1871 const struct ieee80211_scanparams *sp) 1872 { 1873 struct ieee80211_node *ni; 1874 1875 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1876 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1877 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1878 if (ni != NULL) { 1879 struct ieee80211com *ic = vap->iv_ic; 1880 1881 ieee80211_init_neighbor(ni, wh, sp); 1882 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1883 ni->ni_flags |= IEEE80211_NODE_ERP; 1884 ieee80211_node_setuptxparms(ni); 1885 ieee80211_ratectl_node_init(ni); 1886 if (ic->ic_newassoc != NULL) 1887 ic->ic_newassoc(ni, 1); 1888 /* XXX not right for 802.1x/WPA */ 1889 ieee80211_node_authorize(ni); 1890 } 1891 return ni; 1892 } 1893 1894 #define IS_PROBEREQ(wh) \ 1895 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1896 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1897 #define IS_BCAST_PROBEREQ(wh) \ 1898 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1899 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1900 1901 static __inline struct ieee80211_node * 1902 _find_rxnode(struct ieee80211_node_table *nt, 1903 const struct ieee80211_frame_min *wh) 1904 { 1905 if (IS_BCAST_PROBEREQ(wh)) 1906 return NULL; /* spam bcast probe req to all vap's */ 1907 return ieee80211_find_node_locked(nt, wh->i_addr2); 1908 } 1909 1910 /* 1911 * Locate the node for sender, track state, and then pass the 1912 * (referenced) node up to the 802.11 layer for its use. Note 1913 * we can return NULL if the sender is not in the table. 1914 */ 1915 struct ieee80211_node * 1916 #ifdef IEEE80211_DEBUG_REFCNT 1917 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1918 const struct ieee80211_frame_min *wh, const char *func, int line) 1919 #else 1920 ieee80211_find_rxnode(struct ieee80211com *ic, 1921 const struct ieee80211_frame_min *wh) 1922 #endif 1923 { 1924 struct ieee80211_node_table *nt; 1925 struct ieee80211_node *ni; 1926 1927 nt = &ic->ic_sta; 1928 IEEE80211_NODE_LOCK(nt); 1929 ni = _find_rxnode(nt, wh); 1930 IEEE80211_NODE_UNLOCK(nt); 1931 1932 return ni; 1933 } 1934 1935 /* 1936 * Like ieee80211_find_rxnode but use the supplied h/w 1937 * key index as a hint to locate the node in the key 1938 * mapping table. If an entry is present at the key 1939 * index we return it; otherwise do a normal lookup and 1940 * update the mapping table if the station has a unicast 1941 * key assigned to it. 1942 */ 1943 struct ieee80211_node * 1944 #ifdef IEEE80211_DEBUG_REFCNT 1945 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1946 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1947 const char *func, int line) 1948 #else 1949 ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1950 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1951 #endif 1952 { 1953 struct ieee80211_node_table *nt; 1954 struct ieee80211_node *ni; 1955 1956 nt = &ic->ic_sta; 1957 IEEE80211_NODE_LOCK(nt); 1958 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1959 ni = nt->nt_keyixmap[keyix]; 1960 else 1961 ni = NULL; 1962 if (ni == NULL) { 1963 ni = _find_rxnode(nt, wh); 1964 if (ni != NULL && nt->nt_keyixmap != NULL) { 1965 /* 1966 * If the station has a unicast key cache slot 1967 * assigned update the key->node mapping table. 1968 */ 1969 keyix = ni->ni_ucastkey.wk_rxkeyix; 1970 /* XXX can keyixmap[keyix] != NULL? */ 1971 if (keyix < nt->nt_keyixmax && 1972 nt->nt_keyixmap[keyix] == NULL) { 1973 IEEE80211_DPRINTF(ni->ni_vap, 1974 IEEE80211_MSG_NODE, 1975 "%s: add key map entry %p<%s> refcnt %d\n", 1976 __func__, ni, ether_sprintf(ni->ni_macaddr), 1977 ieee80211_node_refcnt(ni)+1); 1978 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1979 } 1980 } 1981 } else { 1982 if (IS_BCAST_PROBEREQ(wh)) 1983 ni = NULL; /* spam bcast probe req to all vap's */ 1984 else 1985 ieee80211_ref_node(ni); 1986 } 1987 IEEE80211_NODE_UNLOCK(nt); 1988 1989 return ni; 1990 } 1991 #undef IS_BCAST_PROBEREQ 1992 #undef IS_PROBEREQ 1993 1994 /* 1995 * Return a reference to the appropriate node for sending 1996 * a data frame. This handles node discovery in adhoc networks. 1997 */ 1998 struct ieee80211_node * 1999 #ifdef IEEE80211_DEBUG_REFCNT 2000 ieee80211_find_txnode_debug(struct ieee80211vap *vap, 2001 const uint8_t macaddr[IEEE80211_ADDR_LEN], 2002 const char *func, int line) 2003 #else 2004 ieee80211_find_txnode(struct ieee80211vap *vap, 2005 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 2006 #endif 2007 { 2008 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 2009 struct ieee80211_node *ni; 2010 2011 /* 2012 * The destination address should be in the node table 2013 * unless this is a multicast/broadcast frame. We can 2014 * also optimize station mode operation, all frames go 2015 * to the bss node. 2016 */ 2017 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 2018 IEEE80211_NODE_LOCK(nt); 2019 if (vap->iv_opmode == IEEE80211_M_STA || 2020 vap->iv_opmode == IEEE80211_M_WDS || 2021 IEEE80211_IS_MULTICAST(macaddr)) 2022 ni = ieee80211_ref_node(vap->iv_bss); 2023 else 2024 ni = ieee80211_find_node_locked(nt, macaddr); 2025 IEEE80211_NODE_UNLOCK(nt); 2026 2027 if (ni == NULL) { 2028 if (vap->iv_opmode == IEEE80211_M_IBSS || 2029 vap->iv_opmode == IEEE80211_M_AHDEMO) { 2030 /* 2031 * In adhoc mode cons up a node for the destination. 2032 * Note that we need an additional reference for the 2033 * caller to be consistent with 2034 * ieee80211_find_node_locked. 2035 */ 2036 /* 2037 * XXX TODO: this doesn't fake up 11n state; we need 2038 * to find another way to get it upgraded. 2039 */ 2040 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 2041 if (ni != NULL) 2042 (void) ieee80211_ref_node(ni); 2043 } else { 2044 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 2045 "no node, discard frame (%s)", __func__); 2046 vap->iv_stats.is_tx_nonode++; 2047 } 2048 } 2049 return ni; 2050 } 2051 2052 static void 2053 _ieee80211_free_node(struct ieee80211_node *ni) 2054 { 2055 struct ieee80211_node_table *nt = ni->ni_table; 2056 2057 /* 2058 * NB: careful about referencing the vap as it may be 2059 * gone if the last reference was held by a driver. 2060 * We know the com will always be present so it's safe 2061 * to use ni_ic below to reclaim resources. 2062 */ 2063 #if 0 2064 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2065 "%s %p<%s> in %s table\n", __func__, ni, 2066 ether_sprintf(ni->ni_macaddr), 2067 nt != NULL ? nt->nt_name : "<gone>"); 2068 #endif 2069 if (ni->ni_associd != 0) { 2070 struct ieee80211vap *vap = ni->ni_vap; 2071 if (vap->iv_aid_bitmap != NULL) 2072 IEEE80211_AID_CLR(vap, ni->ni_associd); 2073 } 2074 if (nt != NULL) 2075 ieee80211_del_node_nt(nt, ni); 2076 ni->ni_ic->ic_node_free(ni); 2077 } 2078 2079 /* 2080 * Clear any entry in the unicast key mapping table. 2081 */ 2082 static int 2083 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2084 { 2085 ieee80211_keyix keyix; 2086 2087 keyix = ni->ni_ucastkey.wk_rxkeyix; 2088 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 2089 nt->nt_keyixmap[keyix] == ni) { 2090 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2091 "%s: %p<%s> clear key map entry %u\n", 2092 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 2093 nt->nt_keyixmap[keyix] = NULL; 2094 ieee80211_node_decref(ni); 2095 return 1; 2096 } 2097 2098 return 0; 2099 } 2100 2101 void 2102 #ifdef IEEE80211_DEBUG_REFCNT 2103 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 2104 #else 2105 ieee80211_free_node(struct ieee80211_node *ni) 2106 #endif 2107 { 2108 struct ieee80211_node_table *nt = ni->ni_table; 2109 2110 #ifdef IEEE80211_DEBUG_REFCNT 2111 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2112 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 2113 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 2114 #endif 2115 if (nt != NULL) { 2116 IEEE80211_NODE_LOCK(nt); 2117 if (ieee80211_node_dectestref(ni)) { 2118 /* 2119 * Last reference, reclaim state. 2120 */ 2121 _ieee80211_free_node(ni); 2122 } else if (ieee80211_node_refcnt(ni) == 1) 2123 if (node_clear_keyixmap(nt, ni)) 2124 _ieee80211_free_node(ni); 2125 IEEE80211_NODE_UNLOCK(nt); 2126 } else { 2127 if (ieee80211_node_dectestref(ni)) 2128 _ieee80211_free_node(ni); 2129 } 2130 } 2131 2132 /* 2133 * Reclaim a unicast key and clear any key cache state. 2134 */ 2135 int 2136 ieee80211_node_delucastkey(struct ieee80211_node *ni) 2137 { 2138 struct ieee80211com *ic = ni->ni_ic; 2139 struct ieee80211_node_table *nt = &ic->ic_sta; 2140 struct ieee80211_node *nikey; 2141 ieee80211_keyix keyix; 2142 int isowned, status; 2143 2144 /* 2145 * NB: We must beware of LOR here; deleting the key 2146 * can cause the crypto layer to block traffic updates 2147 * which can generate a LOR against the node table lock; 2148 * grab it here and stash the key index for our use below. 2149 * 2150 * Must also beware of recursion on the node table lock. 2151 * When called from node_cleanup we may already have 2152 * the node table lock held. Unfortunately there's no 2153 * way to separate out this path so we must do this 2154 * conditionally. 2155 */ 2156 isowned = IEEE80211_NODE_IS_LOCKED(nt); 2157 if (!isowned) 2158 IEEE80211_NODE_LOCK(nt); 2159 nikey = NULL; 2160 status = 1; /* NB: success */ 2161 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 2162 keyix = ni->ni_ucastkey.wk_rxkeyix; 2163 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 2164 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 2165 nikey = nt->nt_keyixmap[keyix]; 2166 nt->nt_keyixmap[keyix] = NULL; 2167 } 2168 } 2169 if (!isowned) 2170 IEEE80211_NODE_UNLOCK(nt); 2171 2172 if (nikey != NULL) { 2173 KASSERT(nikey == ni, 2174 ("key map out of sync, ni %p nikey %p", ni, nikey)); 2175 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2176 "%s: delete key map entry %p<%s> refcnt %d\n", 2177 __func__, ni, ether_sprintf(ni->ni_macaddr), 2178 ieee80211_node_refcnt(ni)-1); 2179 ieee80211_free_node(ni); 2180 } 2181 return status; 2182 } 2183 2184 /* 2185 * Reclaim a node. If this is the last reference count then 2186 * do the normal free work. Otherwise remove it from the node 2187 * table and mark it gone by clearing the back-reference. 2188 */ 2189 static void 2190 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2191 { 2192 2193 IEEE80211_NODE_LOCK_ASSERT(nt); 2194 2195 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2196 "%s: remove %p<%s> from %s table, refcnt %d\n", 2197 __func__, ni, ether_sprintf(ni->ni_macaddr), 2198 nt->nt_name, ieee80211_node_refcnt(ni)-1); 2199 /* 2200 * Clear any entry in the unicast key mapping table. 2201 * We need to do it here so rx lookups don't find it 2202 * in the mapping table even if it's not in the hash 2203 * table. We cannot depend on the mapping table entry 2204 * being cleared because the node may not be free'd. 2205 */ 2206 (void)node_clear_keyixmap(nt, ni); 2207 if (!ieee80211_node_dectestref(ni)) { 2208 /* 2209 * Other references are present, just remove the 2210 * node from the table so it cannot be found. When 2211 * the references are dropped storage will be 2212 * reclaimed. 2213 */ 2214 ieee80211_del_node_nt(nt, ni); 2215 } else 2216 _ieee80211_free_node(ni); 2217 } 2218 2219 /* 2220 * Node table support. 2221 */ 2222 2223 static void 2224 ieee80211_node_table_init(struct ieee80211com *ic, 2225 struct ieee80211_node_table *nt, 2226 const char *name, int inact, int keyixmax) 2227 { 2228 2229 nt->nt_ic = ic; 2230 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 2231 TAILQ_INIT(&nt->nt_node); 2232 nt->nt_count = 0; 2233 nt->nt_name = name; 2234 nt->nt_inact_init = inact; 2235 nt->nt_keyixmax = keyixmax; 2236 if (nt->nt_keyixmax > 0) { 2237 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 2238 keyixmax * sizeof(struct ieee80211_node *), 2239 M_80211_NODE, 2240 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2241 if (nt->nt_keyixmap == NULL) 2242 ic_printf(ic, 2243 "Cannot allocate key index map with %u entries\n", 2244 keyixmax); 2245 } else 2246 nt->nt_keyixmap = NULL; 2247 } 2248 2249 static void 2250 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 2251 struct ieee80211vap *match) 2252 { 2253 struct ieee80211_node *ni, *next; 2254 2255 IEEE80211_NODE_LOCK(nt); 2256 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 2257 if (match != NULL && ni->ni_vap != match) 2258 continue; 2259 /* XXX can this happen? if so need's work */ 2260 if (ni->ni_associd != 0) { 2261 struct ieee80211vap *vap = ni->ni_vap; 2262 2263 if (vap->iv_auth->ia_node_leave != NULL) 2264 vap->iv_auth->ia_node_leave(ni); 2265 if (vap->iv_aid_bitmap != NULL) 2266 IEEE80211_AID_CLR(vap, ni->ni_associd); 2267 } 2268 ni->ni_wdsvap = NULL; /* clear reference */ 2269 node_reclaim(nt, ni); 2270 } 2271 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 2272 /* 2273 * Make a separate pass to clear references to this vap 2274 * held by DWDS entries. They will not be matched above 2275 * because ni_vap will point to the ap vap but we still 2276 * need to clear ni_wdsvap when the WDS vap is destroyed 2277 * and/or reset. 2278 */ 2279 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 2280 if (ni->ni_wdsvap == match) 2281 ni->ni_wdsvap = NULL; 2282 } 2283 IEEE80211_NODE_UNLOCK(nt); 2284 } 2285 2286 static void 2287 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2288 { 2289 ieee80211_node_table_reset(nt, NULL); 2290 if (nt->nt_keyixmap != NULL) { 2291 #ifdef DIAGNOSTIC 2292 /* XXX verify all entries are NULL */ 2293 int i; 2294 for (i = 0; i < nt->nt_keyixmax; i++) 2295 if (nt->nt_keyixmap[i] != NULL) 2296 printf("%s: %s[%u] still active\n", __func__, 2297 nt->nt_name, i); 2298 #endif 2299 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 2300 nt->nt_keyixmap = NULL; 2301 } 2302 IEEE80211_NODE_LOCK_DESTROY(nt); 2303 } 2304 2305 static void 2306 timeout_stations(void *arg __unused, struct ieee80211_node *ni) 2307 { 2308 struct ieee80211com *ic = ni->ni_ic; 2309 struct ieee80211vap *vap = ni->ni_vap; 2310 2311 /* 2312 * Only process stations when in RUN state. This 2313 * insures, for example, that we don't timeout an 2314 * inactive station during CAC. Note that CSA state 2315 * is actually handled in ieee80211_node_timeout as 2316 * it applies to more than timeout processing. 2317 */ 2318 if (vap->iv_state != IEEE80211_S_RUN) 2319 return; 2320 /* 2321 * Ignore entries for which have yet to receive an 2322 * authentication frame. These are transient and 2323 * will be reclaimed when the last reference to them 2324 * goes away (when frame xmits complete). 2325 */ 2326 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2327 vap->iv_opmode == IEEE80211_M_STA) && 2328 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2329 return; 2330 /* 2331 * Free fragment if not needed anymore 2332 * (last fragment older than 1s). 2333 * XXX doesn't belong here, move to node_age 2334 */ 2335 if (ni->ni_rxfrag[0] != NULL && 2336 ticks > ni->ni_rxfragstamp + hz) { 2337 m_freem(ni->ni_rxfrag[0]); 2338 ni->ni_rxfrag[0] = NULL; 2339 } 2340 if (ni->ni_inact > 0) { 2341 ni->ni_inact--; 2342 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2343 "%s: inact %u inact_reload %u nrates %u", 2344 __func__, ni->ni_inact, ni->ni_inact_reload, 2345 ni->ni_rates.rs_nrates); 2346 } 2347 /* 2348 * Special case ourself; we may be idle for extended periods 2349 * of time and regardless reclaiming our state is wrong. 2350 * XXX run ic_node_age 2351 */ 2352 /* XXX before inact decrement? */ 2353 if (ni == vap->iv_bss) 2354 return; 2355 if (ni->ni_associd != 0 || 2356 (vap->iv_opmode == IEEE80211_M_IBSS || 2357 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2358 /* 2359 * Age/drain resources held by the station. 2360 */ 2361 ic->ic_node_age(ni); 2362 /* 2363 * Probe the station before time it out. We 2364 * send a null data frame which may not be 2365 * universally supported by drivers (need it 2366 * for ps-poll support so it should be...). 2367 * 2368 * XXX don't probe the station unless we've 2369 * received a frame from them (and have 2370 * some idea of the rates they are capable 2371 * of); this will get fixed more properly 2372 * soon with better handling of the rate set. 2373 */ 2374 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2375 (0 < ni->ni_inact && 2376 ni->ni_inact <= vap->iv_inact_probe) && 2377 ni->ni_rates.rs_nrates != 0) { 2378 IEEE80211_NOTE(vap, 2379 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2380 ni, "%s", 2381 "probe station due to inactivity"); 2382 /* 2383 * Grab a reference so the node cannot 2384 * be reclaimed before we send the frame. 2385 * ieee80211_send_nulldata understands 2386 * we've done this and reclaims the 2387 * ref for us as needed. 2388 */ 2389 /* XXX fix this (not required anymore). */ 2390 ieee80211_ref_node(ni); 2391 /* XXX useless */ 2392 ieee80211_send_nulldata(ni); 2393 /* XXX stat? */ 2394 return; 2395 } 2396 } 2397 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2398 ni->ni_inact <= 0) { 2399 IEEE80211_NOTE(vap, 2400 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2401 "station timed out due to inactivity " 2402 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2403 /* 2404 * Send a deauthenticate frame and drop the station. 2405 * This is somewhat complicated due to reference counts 2406 * and locking. At this point a station will typically 2407 * have a reference count of 2. ieee80211_node_leave 2408 * will do a "free" of the node which will drop the 2409 * reference count. But in the meantime a reference 2410 * wil be held by the deauth frame. The actual reclaim 2411 * of the node will happen either after the tx is 2412 * completed or by ieee80211_node_leave. 2413 */ 2414 if (ni->ni_associd != 0) { 2415 IEEE80211_SEND_MGMT(ni, 2416 IEEE80211_FC0_SUBTYPE_DEAUTH, 2417 IEEE80211_REASON_AUTH_EXPIRE); 2418 } 2419 ieee80211_node_leave(ni); 2420 vap->iv_stats.is_node_timeout++; 2421 } 2422 } 2423 2424 /* 2425 * Timeout inactive stations and do related housekeeping. 2426 */ 2427 static void 2428 ieee80211_timeout_stations(struct ieee80211com *ic) 2429 { 2430 struct ieee80211_node_table *nt = &ic->ic_sta; 2431 2432 ieee80211_iterate_nodes(nt, timeout_stations, NULL); 2433 } 2434 2435 /* 2436 * Aggressively reclaim resources. This should be used 2437 * only in a critical situation to reclaim mbuf resources. 2438 */ 2439 void 2440 ieee80211_drain(struct ieee80211com *ic) 2441 { 2442 struct ieee80211_node_table *nt = &ic->ic_sta; 2443 struct ieee80211vap *vap; 2444 struct ieee80211_node *ni; 2445 2446 IEEE80211_NODE_LOCK(nt); 2447 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2448 /* 2449 * Ignore entries for which have yet to receive an 2450 * authentication frame. These are transient and 2451 * will be reclaimed when the last reference to them 2452 * goes away (when frame xmits complete). 2453 */ 2454 vap = ni->ni_vap; 2455 /* 2456 * Only process stations when in RUN state. This 2457 * insures, for example, that we don't timeout an 2458 * inactive station during CAC. Note that CSA state 2459 * is actually handled in ieee80211_node_timeout as 2460 * it applies to more than timeout processing. 2461 */ 2462 if (vap->iv_state != IEEE80211_S_RUN) 2463 continue; 2464 /* XXX can vap be NULL? */ 2465 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2466 vap->iv_opmode == IEEE80211_M_STA) && 2467 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2468 continue; 2469 /* 2470 * Free fragments. 2471 * XXX doesn't belong here, move to node_drain 2472 */ 2473 if (ni->ni_rxfrag[0] != NULL) { 2474 m_freem(ni->ni_rxfrag[0]); 2475 ni->ni_rxfrag[0] = NULL; 2476 } 2477 /* 2478 * Drain resources held by the station. 2479 */ 2480 ic->ic_node_drain(ni); 2481 } 2482 IEEE80211_NODE_UNLOCK(nt); 2483 } 2484 2485 /* 2486 * Per-ieee80211com inactivity timer callback. 2487 */ 2488 void 2489 ieee80211_node_timeout(void *arg) 2490 { 2491 struct ieee80211com *ic = arg; 2492 2493 /* 2494 * Defer timeout processing if a channel switch is pending. 2495 * We typically need to be mute so not doing things that 2496 * might generate frames is good to handle in one place. 2497 * Suppressing the station timeout processing may extend the 2498 * lifetime of inactive stations (by not decrementing their 2499 * idle counters) but this should be ok unless the CSA is 2500 * active for an unusually long time. 2501 */ 2502 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2503 ieee80211_scan_timeout(ic); 2504 ieee80211_timeout_stations(ic); 2505 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2506 2507 IEEE80211_LOCK(ic); 2508 ieee80211_erp_timeout(ic); 2509 ieee80211_ht_timeout(ic); 2510 ieee80211_vht_timeout(ic); 2511 IEEE80211_UNLOCK(ic); 2512 } 2513 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2514 ieee80211_node_timeout, ic); 2515 } 2516 2517 /* 2518 * The same as ieee80211_iterate_nodes(), but for one vap only. 2519 */ 2520 int 2521 ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt, 2522 struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg) 2523 { 2524 struct ieee80211_node **ni_arr; 2525 struct ieee80211_node *ni; 2526 size_t size; 2527 int count, i; 2528 2529 /* 2530 * Iterate over the node table and save an array of ref'ed nodes. 2531 * 2532 * This is separated out from calling the actual node function so that 2533 * no LORs will occur. 2534 */ 2535 IEEE80211_NODE_LOCK(nt); 2536 count = nt->nt_count; 2537 size = count * sizeof(struct ieee80211_node *); 2538 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2539 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2540 if (ni_arr == NULL) { 2541 IEEE80211_NODE_UNLOCK(nt); 2542 return (ENOMEM); 2543 } 2544 2545 i = 0; 2546 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2547 if (vap != NULL && ni->ni_vap != vap) 2548 continue; 2549 KASSERT(i < count, 2550 ("node array overflow (vap %p, i %d, count %d)\n", 2551 vap, i, count)); 2552 ni_arr[i] = ieee80211_ref_node(ni); 2553 i++; 2554 } 2555 IEEE80211_NODE_UNLOCK(nt); 2556 2557 for (i = 0; i < count; i++) { 2558 if (ni_arr[i] == NULL) /* end of the list */ 2559 break; 2560 (*f)(arg, ni_arr[i]); 2561 /* ieee80211_free_node() locks by itself */ 2562 ieee80211_free_node(ni_arr[i]); 2563 } 2564 2565 IEEE80211_FREE(ni_arr, M_80211_NODE); 2566 2567 return (0); 2568 } 2569 2570 /* 2571 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2572 * reference in the source. 2573 */ 2574 void 2575 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2576 ieee80211_iter_func *f, void *arg) 2577 { 2578 /* XXX no way to pass error to the caller. */ 2579 (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg); 2580 } 2581 2582 void 2583 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2584 { 2585 printf("0x%p: mac %s refcnt %d\n", ni, 2586 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2587 printf("\tauthmode %u flags 0x%x\n", 2588 ni->ni_authmode, ni->ni_flags); 2589 printf("\tassocid 0x%x txpower %u vlan %u\n", 2590 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2591 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2592 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2593 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2594 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2595 ni->ni_rxfragstamp); 2596 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2597 node_getrssi(ni), ni->ni_noise, 2598 ni->ni_intval, ni->ni_capinfo); 2599 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2600 ether_sprintf(ni->ni_bssid), 2601 ni->ni_esslen, ni->ni_essid, 2602 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2603 printf("\tinact %u inact_reload %u txrate %u\n", 2604 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2605 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2606 ni->ni_htcap, ni->ni_htparam, 2607 ni->ni_htctlchan, ni->ni_ht2ndchan); 2608 printf("\thtopmode %x htstbc %x htchw %u\n", 2609 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2610 printf("\tvhtcap %x freq1 %d freq2 %d vhtbasicmcs %x\n", 2611 ni->ni_vhtcap, (int) ni->ni_vht_chan1, (int) ni->ni_vht_chan2, 2612 (int) ni->ni_vht_basicmcs); 2613 /* XXX VHT state */ 2614 } 2615 2616 void 2617 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2618 { 2619 ieee80211_iterate_nodes(nt, 2620 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2621 } 2622 2623 static void 2624 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2625 { 2626 struct ieee80211vap *vap; 2627 2628 IEEE80211_LOCK_ASSERT(ic); 2629 2630 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2631 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2632 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2633 } 2634 2635 void 2636 ieee80211_notify_erp(struct ieee80211com *ic) 2637 { 2638 IEEE80211_LOCK(ic); 2639 ieee80211_notify_erp_locked(ic); 2640 IEEE80211_UNLOCK(ic); 2641 } 2642 2643 /* 2644 * Handle a station joining an 11g network. 2645 */ 2646 static void 2647 ieee80211_node_join_11g(struct ieee80211_node *ni) 2648 { 2649 struct ieee80211com *ic = ni->ni_ic; 2650 2651 IEEE80211_LOCK_ASSERT(ic); 2652 2653 /* 2654 * Station isn't capable of short slot time. Bump 2655 * the count of long slot time stations and disable 2656 * use of short slot time. Note that the actual switch 2657 * over to long slot time use may not occur until the 2658 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2659 */ 2660 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2661 ic->ic_longslotsta++; 2662 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2663 "station needs long slot time, count %d", 2664 ic->ic_longslotsta); 2665 /* XXX vap's w/ conflicting needs won't work */ 2666 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2667 /* 2668 * Don't force slot time when switched to turbo 2669 * mode as non-ERP stations won't be present; this 2670 * need only be done when on the normal G channel. 2671 */ 2672 ieee80211_set_shortslottime(ic, 0); 2673 } 2674 } 2675 /* 2676 * If the new station is not an ERP station 2677 * then bump the counter and enable protection 2678 * if configured. 2679 */ 2680 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2681 ic->ic_nonerpsta++; 2682 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2683 "station is !ERP, %d non-ERP stations associated", 2684 ic->ic_nonerpsta); 2685 /* 2686 * If station does not support short preamble 2687 * then we must enable use of Barker preamble. 2688 */ 2689 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2690 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2691 "%s", "station needs long preamble"); 2692 ic->ic_flags |= IEEE80211_F_USEBARKER; 2693 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2694 } 2695 /* 2696 * If protection is configured and this is the first 2697 * indication we should use protection, enable it. 2698 */ 2699 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2700 ic->ic_nonerpsta == 1 && 2701 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2702 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2703 "%s: enable use of protection\n", __func__); 2704 ic->ic_flags |= IEEE80211_F_USEPROT; 2705 ieee80211_notify_erp_locked(ic); 2706 } 2707 } else 2708 ni->ni_flags |= IEEE80211_NODE_ERP; 2709 } 2710 2711 void 2712 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2713 { 2714 struct ieee80211com *ic = ni->ni_ic; 2715 struct ieee80211vap *vap = ni->ni_vap; 2716 int newassoc; 2717 2718 if (ni->ni_associd == 0) { 2719 uint16_t aid; 2720 2721 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2722 /* 2723 * It would be good to search the bitmap 2724 * more efficiently, but this will do for now. 2725 */ 2726 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2727 if (!IEEE80211_AID_ISSET(vap, aid)) 2728 break; 2729 } 2730 if (aid >= vap->iv_max_aid) { 2731 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2732 ieee80211_node_leave(ni); 2733 return; 2734 } 2735 ni->ni_associd = aid | 0xc000; 2736 ni->ni_jointime = time_uptime; 2737 IEEE80211_LOCK(ic); 2738 IEEE80211_AID_SET(vap, ni->ni_associd); 2739 vap->iv_sta_assoc++; 2740 ic->ic_sta_assoc++; 2741 2742 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2743 ieee80211_ht_node_join(ni); 2744 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2745 ieee80211_vht_node_join(ni); 2746 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2747 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2748 ieee80211_node_join_11g(ni); 2749 IEEE80211_UNLOCK(ic); 2750 2751 newassoc = 1; 2752 } else 2753 newassoc = 0; 2754 2755 /* 2756 * XXX VHT - should log VHT channel width, etc 2757 */ 2758 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2759 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2760 IEEE80211_NODE_AID(ni), 2761 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2762 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2763 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2764 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2765 /* XXX update for VHT string */ 2766 ni->ni_flags & IEEE80211_NODE_HT ? 2767 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2768 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2769 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2770 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2771 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2772 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2773 ", fast-frames" : "", 2774 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2775 ", turbo" : "" 2776 ); 2777 2778 ieee80211_node_setuptxparms(ni); 2779 ieee80211_ratectl_node_init(ni); 2780 /* give driver a chance to setup state like ni_txrate */ 2781 if (ic->ic_newassoc != NULL) 2782 ic->ic_newassoc(ni, newassoc); 2783 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2784 /* tell the authenticator about new station */ 2785 if (vap->iv_auth->ia_node_join != NULL) 2786 vap->iv_auth->ia_node_join(ni); 2787 ieee80211_notify_node_join(ni, 2788 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2789 } 2790 2791 static void 2792 disable_protection(struct ieee80211com *ic) 2793 { 2794 KASSERT(ic->ic_nonerpsta == 0 && 2795 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2796 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2797 ic->ic_flags_ext)); 2798 2799 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2800 /* XXX verify mode? */ 2801 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2802 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2803 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2804 } 2805 ieee80211_notify_erp_locked(ic); 2806 } 2807 2808 /* 2809 * Handle a station leaving an 11g network. 2810 */ 2811 static void 2812 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2813 { 2814 struct ieee80211com *ic = ni->ni_ic; 2815 2816 IEEE80211_LOCK_ASSERT(ic); 2817 2818 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2819 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2820 ic->ic_bsschan->ic_flags)); 2821 2822 /* 2823 * If a long slot station do the slot time bookkeeping. 2824 */ 2825 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2826 KASSERT(ic->ic_longslotsta > 0, 2827 ("bogus long slot station count %d", ic->ic_longslotsta)); 2828 ic->ic_longslotsta--; 2829 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2830 "long slot time station leaves, count now %d", 2831 ic->ic_longslotsta); 2832 if (ic->ic_longslotsta == 0) { 2833 /* 2834 * Re-enable use of short slot time if supported 2835 * and not operating in IBSS mode (per spec). 2836 */ 2837 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2838 ic->ic_opmode != IEEE80211_M_IBSS) { 2839 IEEE80211_DPRINTF(ni->ni_vap, 2840 IEEE80211_MSG_ASSOC, 2841 "%s: re-enable use of short slot time\n", 2842 __func__); 2843 ieee80211_set_shortslottime(ic, 1); 2844 } 2845 } 2846 } 2847 /* 2848 * If a non-ERP station do the protection-related bookkeeping. 2849 */ 2850 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2851 KASSERT(ic->ic_nonerpsta > 0, 2852 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2853 ic->ic_nonerpsta--; 2854 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2855 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2856 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2857 " (non-ERP sta present)" : ""); 2858 if (ic->ic_nonerpsta == 0 && 2859 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2860 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2861 "%s: disable use of protection\n", __func__); 2862 disable_protection(ic); 2863 } 2864 } 2865 } 2866 2867 /* 2868 * Time out presence of an overlapping bss with non-ERP 2869 * stations. When operating in hostap mode we listen for 2870 * beacons from other stations and if we identify a non-ERP 2871 * station is present we enable protection. To identify 2872 * when all non-ERP stations are gone we time out this 2873 * condition. 2874 */ 2875 static void 2876 ieee80211_erp_timeout(struct ieee80211com *ic) 2877 { 2878 2879 IEEE80211_LOCK_ASSERT(ic); 2880 2881 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2882 ieee80211_time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2883 #if 0 2884 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2885 "%s", "age out non-ERP sta present on channel"); 2886 #endif 2887 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2888 if (ic->ic_nonerpsta == 0) 2889 disable_protection(ic); 2890 } 2891 } 2892 2893 /* 2894 * Handle bookkeeping for station deauthentication/disassociation 2895 * when operating as an ap. 2896 */ 2897 void 2898 ieee80211_node_leave(struct ieee80211_node *ni) 2899 { 2900 struct ieee80211com *ic = ni->ni_ic; 2901 struct ieee80211vap *vap = ni->ni_vap; 2902 struct ieee80211_node_table *nt = ni->ni_table; 2903 2904 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2905 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2906 2907 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2908 ("unexpected operating mode %u", vap->iv_opmode)); 2909 /* 2910 * If node wasn't previously associated all 2911 * we need to do is reclaim the reference. 2912 */ 2913 /* XXX ibss mode bypasses 11g and notification */ 2914 if (ni->ni_associd == 0) 2915 goto done; 2916 /* 2917 * Tell the authenticator the station is leaving. 2918 * Note that we must do this before yanking the 2919 * association id as the authenticator uses the 2920 * associd to locate it's state block. 2921 */ 2922 if (vap->iv_auth->ia_node_leave != NULL) 2923 vap->iv_auth->ia_node_leave(ni); 2924 2925 IEEE80211_LOCK(ic); 2926 IEEE80211_AID_CLR(vap, ni->ni_associd); 2927 vap->iv_sta_assoc--; 2928 ic->ic_sta_assoc--; 2929 2930 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2931 ieee80211_vht_node_leave(ni); 2932 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2933 ieee80211_ht_node_leave(ni); 2934 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2935 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2936 ieee80211_node_leave_11g(ni); 2937 IEEE80211_UNLOCK(ic); 2938 /* 2939 * Cleanup station state. In particular clear various 2940 * state that might otherwise be reused if the node 2941 * is reused before the reference count goes to zero 2942 * (and memory is reclaimed). 2943 */ 2944 ieee80211_sta_leave(ni); 2945 done: 2946 /* 2947 * Remove the node from any table it's recorded in and 2948 * drop the caller's reference. Removal from the table 2949 * is important to insure the node is not reprocessed 2950 * for inactivity. 2951 */ 2952 if (nt != NULL) { 2953 IEEE80211_NODE_LOCK(nt); 2954 node_reclaim(nt, ni); 2955 IEEE80211_NODE_UNLOCK(nt); 2956 } else 2957 ieee80211_free_node(ni); 2958 } 2959 2960 struct rssiinfo { 2961 int rssi_samples; 2962 uint32_t rssi_total; 2963 }; 2964 2965 static void 2966 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2967 { 2968 struct rssiinfo *info = arg; 2969 struct ieee80211vap *vap = ni->ni_vap; 2970 int8_t rssi; 2971 2972 /* only associated stations */ 2973 if (ni->ni_associd == 0) 2974 return; 2975 rssi = vap->iv_ic->ic_node_getrssi(ni); 2976 if (rssi != 0) { 2977 info->rssi_samples++; 2978 info->rssi_total += rssi; 2979 } 2980 } 2981 2982 static void 2983 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2984 { 2985 struct rssiinfo *info = arg; 2986 struct ieee80211vap *vap = ni->ni_vap; 2987 int8_t rssi; 2988 2989 /* only neighbors */ 2990 /* XXX check bssid */ 2991 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2992 return; 2993 rssi = vap->iv_ic->ic_node_getrssi(ni); 2994 if (rssi != 0) { 2995 info->rssi_samples++; 2996 info->rssi_total += rssi; 2997 } 2998 } 2999 3000 #ifdef IEEE80211_SUPPORT_MESH 3001 static void 3002 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 3003 { 3004 struct rssiinfo *info = arg; 3005 struct ieee80211vap *vap = ni->ni_vap; 3006 int8_t rssi; 3007 3008 /* only neighbors that peered successfully */ 3009 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 3010 return; 3011 rssi = vap->iv_ic->ic_node_getrssi(ni); 3012 if (rssi != 0) { 3013 info->rssi_samples++; 3014 info->rssi_total += rssi; 3015 } 3016 } 3017 #endif /* IEEE80211_SUPPORT_MESH */ 3018 3019 int8_t 3020 ieee80211_getrssi(struct ieee80211vap *vap) 3021 { 3022 #define NZ(x) ((x) == 0 ? 1 : (x)) 3023 struct ieee80211com *ic = vap->iv_ic; 3024 struct rssiinfo info; 3025 3026 info.rssi_total = 0; 3027 info.rssi_samples = 0; 3028 switch (vap->iv_opmode) { 3029 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 3030 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 3031 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi, 3032 &info); 3033 break; 3034 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 3035 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi, 3036 &info); 3037 break; 3038 #ifdef IEEE80211_SUPPORT_MESH 3039 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 3040 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi, 3041 &info); 3042 break; 3043 #endif 3044 case IEEE80211_M_MONITOR: /* XXX */ 3045 case IEEE80211_M_STA: /* use stats from associated ap */ 3046 default: 3047 if (vap->iv_bss != NULL) 3048 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 3049 info.rssi_samples = 1; 3050 break; 3051 } 3052 return info.rssi_total / NZ(info.rssi_samples); 3053 #undef NZ 3054 } 3055 3056 void 3057 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 3058 { 3059 3060 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 3061 return; 3062 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 3063 /* for non-station mode return avg'd rssi accounting */ 3064 if (vap->iv_opmode != IEEE80211_M_STA) 3065 *rssi = ieee80211_getrssi(vap); 3066 } 3067