1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2001 Atsushi Onoe 5 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_wlan.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/mbuf.h> 37 #include <sys/malloc.h> 38 #include <sys/kernel.h> 39 40 #include <sys/socket.h> 41 42 #include <net/if.h> 43 #include <net/if_var.h> 44 #include <net/if_media.h> 45 #include <net/ethernet.h> 46 47 #include <net80211/ieee80211_var.h> 48 #include <net80211/ieee80211_input.h> 49 #ifdef IEEE80211_SUPPORT_SUPERG 50 #include <net80211/ieee80211_superg.h> 51 #endif 52 #ifdef IEEE80211_SUPPORT_TDMA 53 #include <net80211/ieee80211_tdma.h> 54 #endif 55 #include <net80211/ieee80211_wds.h> 56 #include <net80211/ieee80211_mesh.h> 57 #include <net80211/ieee80211_ratectl.h> 58 #include <net80211/ieee80211_vht.h> 59 60 #include <net/bpf.h> 61 62 /* 63 * IEEE80211_NODE_HASHSIZE must be a power of 2. 64 */ 65 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 66 67 /* 68 * Association id's are managed with a bit vector. 69 */ 70 #define IEEE80211_AID_SET(_vap, b) \ 71 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 72 (1 << (IEEE80211_AID(b) % 32))) 73 #define IEEE80211_AID_CLR(_vap, b) \ 74 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 75 ~(1 << (IEEE80211_AID(b) % 32))) 76 #define IEEE80211_AID_ISSET(_vap, b) \ 77 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 78 79 static int ieee80211_sta_join1(struct ieee80211_node *); 80 81 static struct ieee80211_node *node_alloc(struct ieee80211vap *, 82 const uint8_t [IEEE80211_ADDR_LEN]); 83 static int node_init(struct ieee80211_node *); 84 static void node_cleanup(struct ieee80211_node *); 85 static void node_free(struct ieee80211_node *); 86 static void node_age(struct ieee80211_node *); 87 static int8_t node_getrssi(const struct ieee80211_node *); 88 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 89 static void node_getmimoinfo(const struct ieee80211_node *, 90 struct ieee80211_mimo_info *); 91 92 static void _ieee80211_free_node(struct ieee80211_node *); 93 94 static void node_reclaim(struct ieee80211_node_table *nt, 95 struct ieee80211_node *ni); 96 static void ieee80211_node_table_init(struct ieee80211com *ic, 97 struct ieee80211_node_table *nt, const char *name, 98 int inact, int keymaxix); 99 static void ieee80211_node_table_reset(struct ieee80211_node_table *, 100 struct ieee80211vap *); 101 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 102 static void ieee80211_vap_erp_timeout(struct ieee80211vap *); 103 104 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 105 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 106 107 void 108 ieee80211_node_attach(struct ieee80211com *ic) 109 { 110 /* XXX really want maxlen enforced per-sta */ 111 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 112 "802.11 staging q"); 113 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 114 IEEE80211_INACT_INIT, ic->ic_max_keyix); 115 callout_init(&ic->ic_inact, 1); 116 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 117 ieee80211_node_timeout, ic); 118 119 ic->ic_node_alloc = node_alloc; 120 ic->ic_node_init = node_init; 121 ic->ic_node_free = node_free; 122 ic->ic_node_cleanup = node_cleanup; 123 ic->ic_node_age = node_age; 124 ic->ic_node_drain = node_age; /* NB: same as age */ 125 ic->ic_node_getrssi = node_getrssi; 126 ic->ic_node_getsignal = node_getsignal; 127 ic->ic_node_getmimoinfo = node_getmimoinfo; 128 129 /* 130 * Set flags to be propagated to all vap's; 131 * these define default behaviour/configuration. 132 */ 133 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 134 } 135 136 void 137 ieee80211_node_detach(struct ieee80211com *ic) 138 { 139 140 callout_drain(&ic->ic_inact); 141 ieee80211_node_table_cleanup(&ic->ic_sta); 142 ieee80211_ageq_drain(&ic->ic_stageq); 143 ieee80211_ageq_cleanup(&ic->ic_stageq); 144 } 145 146 void 147 ieee80211_node_vattach(struct ieee80211vap *vap) 148 { 149 /* NB: driver can override */ 150 vap->iv_max_aid = IEEE80211_AID_DEF; 151 152 /* default station inactivity timer setings */ 153 vap->iv_inact_init = IEEE80211_INACT_INIT; 154 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 155 vap->iv_inact_run = IEEE80211_INACT_RUN; 156 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 157 158 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 159 "%s: init %u auth %u run %u probe %u\n", __func__, 160 vap->iv_inact_init, vap->iv_inact_auth, 161 vap->iv_inact_run, vap->iv_inact_probe); 162 } 163 164 void 165 ieee80211_node_latevattach(struct ieee80211vap *vap) 166 { 167 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 168 /* XXX should we allow max aid to be zero? */ 169 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 170 vap->iv_max_aid = IEEE80211_AID_MIN; 171 if_printf(vap->iv_ifp, 172 "WARNING: max aid too small, changed to %d\n", 173 vap->iv_max_aid); 174 } 175 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( 176 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 177 M_80211_NODE, 178 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 179 if (vap->iv_aid_bitmap == NULL) { 180 /* XXX no way to recover */ 181 printf("%s: no memory for AID bitmap, max aid %d!\n", 182 __func__, vap->iv_max_aid); 183 vap->iv_max_aid = 0; 184 } 185 } 186 187 ieee80211_reset_bss(vap); 188 189 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 190 } 191 192 void 193 ieee80211_node_vdetach(struct ieee80211vap *vap) 194 { 195 struct ieee80211com *ic = vap->iv_ic; 196 197 ieee80211_node_table_reset(&ic->ic_sta, vap); 198 if (vap->iv_bss != NULL) { 199 ieee80211_free_node(vap->iv_bss); 200 vap->iv_bss = NULL; 201 } 202 if (vap->iv_aid_bitmap != NULL) { 203 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); 204 vap->iv_aid_bitmap = NULL; 205 } 206 } 207 208 /* 209 * Port authorize/unauthorize interfaces for use by an authenticator. 210 */ 211 212 void 213 ieee80211_node_authorize(struct ieee80211_node *ni) 214 { 215 struct ieee80211vap *vap = ni->ni_vap; 216 217 ni->ni_flags |= IEEE80211_NODE_AUTH; 218 ni->ni_inact_reload = vap->iv_inact_run; 219 ni->ni_inact = ni->ni_inact_reload; 220 221 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 222 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 223 } 224 225 void 226 ieee80211_node_unauthorize(struct ieee80211_node *ni) 227 { 228 struct ieee80211vap *vap = ni->ni_vap; 229 230 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 231 ni->ni_inact_reload = vap->iv_inact_auth; 232 if (ni->ni_inact > ni->ni_inact_reload) 233 ni->ni_inact = ni->ni_inact_reload; 234 235 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 236 "%s: inact_reload %u inact %u", __func__, 237 ni->ni_inact_reload, ni->ni_inact); 238 } 239 240 /* 241 * Fix tx parameters for a node according to ``association state''. 242 */ 243 void 244 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 245 { 246 struct ieee80211vap *vap = ni->ni_vap; 247 enum ieee80211_phymode mode; 248 249 if (ni->ni_flags & IEEE80211_NODE_VHT) { 250 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 251 mode = IEEE80211_MODE_VHT_5GHZ; 252 else 253 mode = IEEE80211_MODE_VHT_2GHZ; 254 } else if (ni->ni_flags & IEEE80211_NODE_HT) { 255 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 256 mode = IEEE80211_MODE_11NA; 257 else 258 mode = IEEE80211_MODE_11NG; 259 } else { /* legacy rate handling */ 260 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 261 mode = IEEE80211_MODE_STURBO_A; 262 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 263 mode = IEEE80211_MODE_HALF; 264 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 265 mode = IEEE80211_MODE_QUARTER; 266 /* NB: 108A should be handled as 11a */ 267 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 268 mode = IEEE80211_MODE_11A; 269 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 270 (ni->ni_flags & IEEE80211_NODE_ERP)) 271 mode = IEEE80211_MODE_11G; 272 else 273 mode = IEEE80211_MODE_11B; 274 } 275 ni->ni_txparms = &vap->iv_txparms[mode]; 276 } 277 278 /* 279 * Set/change the channel. The rate set is also updated as 280 * to insure a consistent view by drivers. 281 * XXX should be private but hostap needs it to deal with CSA 282 */ 283 void 284 ieee80211_node_set_chan(struct ieee80211_node *ni, 285 struct ieee80211_channel *chan) 286 { 287 struct ieee80211com *ic = ni->ni_ic; 288 struct ieee80211vap *vap = ni->ni_vap; 289 enum ieee80211_phymode mode; 290 291 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 292 293 ni->ni_chan = chan; 294 mode = ieee80211_chan2mode(chan); 295 if (IEEE80211_IS_CHAN_HT(chan)) { 296 /* 297 * We must install the legacy rate est in ni_rates and the 298 * HT rate set in ni_htrates. 299 */ 300 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 301 /* 302 * Setup bss tx parameters based on operating mode. We 303 * use legacy rates when operating in a mixed HT+non-HT bss 304 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 305 */ 306 if (mode == IEEE80211_MODE_11NA && 307 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 308 mode = IEEE80211_MODE_11A; 309 else if (mode == IEEE80211_MODE_11NG && 310 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 311 mode = IEEE80211_MODE_11G; 312 if (mode == IEEE80211_MODE_11G && 313 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 314 mode = IEEE80211_MODE_11B; 315 } 316 ni->ni_txparms = &vap->iv_txparms[mode]; 317 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 318 } 319 320 static __inline void 321 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 322 { 323 /* propagate useful state */ 324 nbss->ni_authmode = obss->ni_authmode; 325 nbss->ni_txpower = obss->ni_txpower; 326 nbss->ni_vlan = obss->ni_vlan; 327 /* XXX statistics? */ 328 /* XXX legacy WDS bssid? */ 329 } 330 331 void 332 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 333 { 334 struct ieee80211com *ic = vap->iv_ic; 335 struct ieee80211_node *ni; 336 337 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 338 "%s: creating %s on channel %u%c flags 0x%08x\n", __func__, 339 ieee80211_opmode_name[vap->iv_opmode], 340 ieee80211_chan2ieee(ic, chan), 341 ieee80211_channel_type_char(chan), 342 chan->ic_flags); 343 344 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 345 if (ni == NULL) { 346 /* XXX recovery? */ 347 return; 348 } 349 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 350 ni->ni_esslen = vap->iv_des_ssid[0].len; 351 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 352 if (vap->iv_bss != NULL) 353 copy_bss(ni, vap->iv_bss); 354 ni->ni_intval = ic->ic_bintval; 355 if (vap->iv_flags & IEEE80211_F_PRIVACY) 356 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 357 if (ic->ic_phytype == IEEE80211_T_FH) { 358 ni->ni_fhdwell = 200; /* XXX */ 359 ni->ni_fhindex = 1; 360 } 361 if (vap->iv_opmode == IEEE80211_M_IBSS) { 362 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 363 if (vap->iv_flags & IEEE80211_F_DESBSSID) 364 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 365 else { 366 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 367 /* clear group bit, add local bit */ 368 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 369 } 370 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 371 if (vap->iv_flags & IEEE80211_F_DESBSSID) 372 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 373 else 374 #ifdef IEEE80211_SUPPORT_TDMA 375 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 376 #endif 377 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 378 #ifdef IEEE80211_SUPPORT_MESH 379 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 380 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 381 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 382 #endif 383 } 384 /* 385 * Fix the channel and related attributes. 386 */ 387 /* clear DFS CAC state on previous channel */ 388 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 389 ic->ic_bsschan->ic_freq != chan->ic_freq && 390 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 391 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 392 ic->ic_bsschan = chan; 393 ieee80211_node_set_chan(ni, chan); 394 ic->ic_curmode = ieee80211_chan2mode(chan); 395 /* 396 * Do mode-specific setup. 397 */ 398 if (IEEE80211_IS_CHAN_FULL(chan)) { 399 if (IEEE80211_IS_CHAN_ANYG(chan)) { 400 /* 401 * Use a mixed 11b/11g basic rate set. 402 */ 403 ieee80211_setbasicrates(&ni->ni_rates, 404 IEEE80211_MODE_11G); 405 if (vap->iv_flags & IEEE80211_F_PUREG) { 406 /* 407 * Also mark OFDM rates basic so 11b 408 * stations do not join (WiFi compliance). 409 */ 410 ieee80211_addbasicrates(&ni->ni_rates, 411 IEEE80211_MODE_11A); 412 } 413 } else if (IEEE80211_IS_CHAN_B(chan)) { 414 /* 415 * Force pure 11b rate set. 416 */ 417 ieee80211_setbasicrates(&ni->ni_rates, 418 IEEE80211_MODE_11B); 419 } 420 } 421 422 /* XXX TODO: other bits and pieces - eg fast-frames? */ 423 424 /* If we're an 11n channel then initialise the 11n bits */ 425 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { 426 /* XXX what else? */ 427 ieee80211_ht_node_init(ni); 428 ieee80211_vht_node_init(ni); 429 } else if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 430 /* XXX what else? */ 431 ieee80211_ht_node_init(ni); 432 } 433 434 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 435 } 436 437 /* 438 * Reset bss state on transition to the INIT state. 439 * Clear any stations from the table (they have been 440 * deauth'd) and reset the bss node (clears key, rate 441 * etc. state). 442 */ 443 void 444 ieee80211_reset_bss(struct ieee80211vap *vap) 445 { 446 struct ieee80211com *ic = vap->iv_ic; 447 struct ieee80211_node *ni, *obss; 448 449 ieee80211_node_table_reset(&ic->ic_sta, vap); 450 /* XXX multi-bss: wrong */ 451 ieee80211_vap_reset_erp(vap); 452 453 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 454 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 455 obss = vap->iv_bss; 456 vap->iv_bss = ieee80211_ref_node(ni); 457 if (obss != NULL) { 458 copy_bss(ni, obss); 459 ni->ni_intval = ic->ic_bintval; 460 ieee80211_free_node(obss); 461 } else 462 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 463 } 464 465 static int 466 match_ssid(const struct ieee80211_node *ni, 467 int nssid, const struct ieee80211_scan_ssid ssids[]) 468 { 469 int i; 470 471 for (i = 0; i < nssid; i++) { 472 if (ni->ni_esslen == ssids[i].len && 473 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 474 return 1; 475 } 476 return 0; 477 } 478 479 /* 480 * Test a node for suitability/compatibility. 481 */ 482 static int 483 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 484 { 485 struct ieee80211com *ic = ni->ni_ic; 486 uint8_t rate; 487 488 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 489 return 0; 490 if (vap->iv_opmode == IEEE80211_M_IBSS) { 491 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 492 return 0; 493 } else { 494 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 495 return 0; 496 } 497 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 498 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 499 return 0; 500 } else { 501 /* XXX does this mean privacy is supported or required? */ 502 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 503 return 0; 504 } 505 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 506 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 507 if (rate & IEEE80211_RATE_BASIC) 508 return 0; 509 if (vap->iv_des_nssid != 0 && 510 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 511 return 0; 512 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 513 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 514 return 0; 515 return 1; 516 } 517 518 #ifdef IEEE80211_DEBUG 519 /* 520 * Display node suitability/compatibility. 521 */ 522 static void 523 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 524 { 525 struct ieee80211com *ic = ni->ni_ic; 526 uint8_t rate; 527 int fail; 528 529 fail = 0; 530 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 531 fail |= 0x01; 532 if (vap->iv_opmode == IEEE80211_M_IBSS) { 533 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 534 fail |= 0x02; 535 } else { 536 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 537 fail |= 0x02; 538 } 539 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 540 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 541 fail |= 0x04; 542 } else { 543 /* XXX does this mean privacy is supported or required? */ 544 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 545 fail |= 0x04; 546 } 547 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 548 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 549 if (rate & IEEE80211_RATE_BASIC) 550 fail |= 0x08; 551 if (vap->iv_des_nssid != 0 && 552 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 553 fail |= 0x10; 554 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 555 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 556 fail |= 0x20; 557 558 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 559 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 560 printf(" %3d%c", 561 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 562 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 563 fail & 0x08 ? '!' : ' '); 564 printf(" %4s%c", 565 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 566 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 567 "????", 568 fail & 0x02 ? '!' : ' '); 569 printf(" %3s%c ", 570 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 571 fail & 0x04 ? '!' : ' '); 572 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 573 printf("%s\n", fail & 0x10 ? "!" : ""); 574 } 575 #endif /* IEEE80211_DEBUG */ 576 577 int 578 ieee80211_ibss_merge_check(struct ieee80211_node *ni) 579 { 580 struct ieee80211vap *vap = ni->ni_vap; 581 582 if (ni == vap->iv_bss || 583 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 584 /* unchanged, nothing to do */ 585 return 0; 586 } 587 588 if (!check_bss(vap, ni)) { 589 /* capabilities mismatch */ 590 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 591 "%s: merge failed, capabilities mismatch\n", __func__); 592 #ifdef IEEE80211_DEBUG 593 if (ieee80211_msg_assoc(vap)) 594 check_bss_debug(vap, ni); 595 #endif 596 vap->iv_stats.is_ibss_capmismatch++; 597 return 0; 598 } 599 600 return 1; 601 } 602 603 /* 604 * Check if the given node should populate the node table. 605 * 606 * We need to be in "see all beacons for all ssids" mode in order 607 * to do IBSS merges, however this means we will populate nodes for 608 * /all/ IBSS SSIDs, versus just the one we care about. 609 * 610 * So this check ensures the node can actually belong to our IBSS 611 * configuration. For now it simply checks the SSID. 612 */ 613 int 614 ieee80211_ibss_node_check_new(struct ieee80211_node *ni, 615 const struct ieee80211_scanparams *scan) 616 { 617 struct ieee80211vap *vap = ni->ni_vap; 618 int i; 619 620 /* 621 * If we have no SSID and no scan SSID, return OK. 622 */ 623 if (vap->iv_des_nssid == 0 && scan->ssid == NULL) 624 goto ok; 625 626 /* 627 * If we have one of (SSID, scan SSID) then return error. 628 */ 629 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL)) 630 goto mismatch; 631 632 /* 633 * Double-check - we need scan SSID. 634 */ 635 if (scan->ssid == NULL) 636 goto mismatch; 637 638 /* 639 * Check if the scan SSID matches the SSID list for the VAP. 640 */ 641 for (i = 0; i < vap->iv_des_nssid; i++) { 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 #endif 676 677 if (! ieee80211_ibss_merge_check(ni)) 678 return 0; 679 680 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 681 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 682 ether_sprintf(ni->ni_bssid), 683 vap->iv_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 684 vap->iv_flags&IEEE80211_F_SHSLOT ? "short" : "long", 685 vap->iv_flags&IEEE80211_F_USEPROT ? ", protection" : "" 686 ); 687 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 688 } 689 690 /* 691 * Calculate HT channel promotion flags for all vaps. 692 * This assumes ni_chan have been setup for each vap. 693 */ 694 static int 695 gethtadjustflags(struct ieee80211com *ic) 696 { 697 struct ieee80211vap *vap; 698 int flags; 699 700 flags = 0; 701 /* XXX locking */ 702 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 703 if (vap->iv_state < IEEE80211_S_RUN) 704 continue; 705 switch (vap->iv_opmode) { 706 case IEEE80211_M_WDS: 707 case IEEE80211_M_STA: 708 case IEEE80211_M_AHDEMO: 709 case IEEE80211_M_HOSTAP: 710 case IEEE80211_M_IBSS: 711 case IEEE80211_M_MBSS: 712 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 713 break; 714 default: 715 break; 716 } 717 } 718 return flags; 719 } 720 721 /* 722 * Calculate VHT channel promotion flags for all vaps. 723 * This assumes ni_chan have been setup for each vap. 724 */ 725 static int 726 getvhtadjustflags(struct ieee80211com *ic) 727 { 728 struct ieee80211vap *vap; 729 int flags; 730 731 flags = 0; 732 /* XXX locking */ 733 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 734 if (vap->iv_state < IEEE80211_S_RUN) 735 continue; 736 switch (vap->iv_opmode) { 737 case IEEE80211_M_WDS: 738 case IEEE80211_M_STA: 739 case IEEE80211_M_AHDEMO: 740 case IEEE80211_M_HOSTAP: 741 case IEEE80211_M_IBSS: 742 case IEEE80211_M_MBSS: 743 flags |= ieee80211_vhtchanflags(vap->iv_bss->ni_chan); 744 break; 745 default: 746 break; 747 } 748 } 749 return flags; 750 } 751 752 /* 753 * Check if the current channel needs to change based on whether 754 * any vap's are using HT20/HT40. This is used to sync the state 755 * of ic_curchan after a channel width change on a running vap. 756 * 757 * Same applies for VHT. 758 */ 759 void 760 ieee80211_sync_curchan(struct ieee80211com *ic) 761 { 762 struct ieee80211_channel *c; 763 764 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 765 c = ieee80211_vht_adjust_channel(ic, c, getvhtadjustflags(ic)); 766 767 if (c != ic->ic_curchan) { 768 ic->ic_curchan = c; 769 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 770 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 771 IEEE80211_UNLOCK(ic); 772 ic->ic_set_channel(ic); 773 ieee80211_radiotap_chan_change(ic); 774 IEEE80211_LOCK(ic); 775 } 776 } 777 778 /* 779 * Setup the current channel. The request channel may be 780 * promoted if other vap's are operating with HT20/HT40. 781 */ 782 void 783 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 784 { 785 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 786 int flags = gethtadjustflags(ic); 787 /* 788 * Check for channel promotion required to support the 789 * set of running vap's. This assumes we are called 790 * after ni_chan is setup for each vap. 791 */ 792 /* XXX VHT? */ 793 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 794 if (flags > ieee80211_htchanflags(c)) 795 c = ieee80211_ht_adjust_channel(ic, c, flags); 796 } 797 798 /* 799 * VHT promotion - this will at least promote to VHT20/40 800 * based on what HT has done; it may further promote the 801 * channel to VHT80 or above. 802 */ 803 if (ic->ic_vhtcaps != 0) { 804 int flags = getvhtadjustflags(ic); 805 if (flags > ieee80211_vhtchanflags(c)) 806 c = ieee80211_vht_adjust_channel(ic, c, flags); 807 } 808 809 ic->ic_bsschan = ic->ic_curchan = c; 810 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 811 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 812 } 813 814 /* 815 * Change the current channel. The channel change is guaranteed to have 816 * happened before the next state change. 817 */ 818 void 819 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 820 { 821 ieee80211_setupcurchan(ic, c); 822 ieee80211_runtask(ic, &ic->ic_chan_task); 823 } 824 825 void 826 ieee80211_update_chw(struct ieee80211com *ic) 827 { 828 829 ieee80211_setupcurchan(ic, ic->ic_curchan); 830 ieee80211_runtask(ic, &ic->ic_chw_task); 831 } 832 833 /* 834 * Join the specified IBSS/BSS network. The node is assumed to 835 * be passed in with a held reference. 836 */ 837 static int 838 ieee80211_sta_join1(struct ieee80211_node *selbs) 839 { 840 struct ieee80211vap *vap = selbs->ni_vap; 841 struct ieee80211com *ic = selbs->ni_ic; 842 struct ieee80211_node *obss; 843 int canreassoc; 844 845 /* 846 * Committed to selbs, setup state. 847 */ 848 obss = vap->iv_bss; 849 /* 850 * Check if old+new node have the same address in which 851 * case we can reassociate when operating in sta mode. 852 */ 853 canreassoc = (obss != NULL && 854 vap->iv_state == IEEE80211_S_RUN && 855 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 856 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 857 if (obss != NULL) { 858 struct ieee80211_node_table *nt = obss->ni_table; 859 860 copy_bss(selbs, obss); 861 ieee80211_node_decref(obss); /* iv_bss reference */ 862 863 IEEE80211_NODE_LOCK(nt); 864 node_reclaim(nt, obss); /* station table reference */ 865 IEEE80211_NODE_UNLOCK(nt); 866 867 obss = NULL; /* NB: guard against later use */ 868 } 869 870 /* 871 * Delete unusable rates; we've already checked 872 * that the negotiated rate set is acceptable. 873 */ 874 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 875 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 876 877 ieee80211_setcurchan(ic, selbs->ni_chan); 878 /* 879 * Set the erp state (mostly the slot time) to deal with 880 * the auto-select case; this should be redundant if the 881 * mode is locked. 882 */ 883 ieee80211_vap_reset_erp(vap); 884 ieee80211_wme_initparams(vap); 885 886 if (vap->iv_opmode == IEEE80211_M_STA) { 887 if (canreassoc) { 888 /* Reassociate */ 889 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 890 } else { 891 /* 892 * Act as if we received a DEAUTH frame in case we 893 * are invoked from the RUN state. This will cause 894 * us to try to re-authenticate if we are operating 895 * as a station. 896 */ 897 ieee80211_new_state(vap, IEEE80211_S_AUTH, 898 IEEE80211_FC0_SUBTYPE_DEAUTH); 899 } 900 } else 901 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 902 return 1; 903 } 904 905 int 906 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 907 const struct ieee80211_scan_entry *se) 908 { 909 struct ieee80211com *ic = vap->iv_ic; 910 struct ieee80211_node *ni; 911 int do_ht = 0; 912 913 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 914 if (ni == NULL) { 915 /* XXX msg */ 916 return 0; 917 } 918 919 /* 920 * Expand scan state into node's format. 921 * XXX may not need all this stuff 922 */ 923 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 924 ni->ni_esslen = se->se_ssid[1]; 925 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 926 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 927 ni->ni_intval = se->se_intval; 928 ni->ni_capinfo = se->se_capinfo; 929 ni->ni_chan = chan; 930 ni->ni_timoff = se->se_timoff; 931 ni->ni_fhdwell = se->se_fhdwell; 932 ni->ni_fhindex = se->se_fhindex; 933 ni->ni_erp = se->se_erp; 934 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 935 ni->ni_noise = se->se_noise; 936 if (vap->iv_opmode == IEEE80211_M_STA) { 937 /* NB: only infrastructure mode requires an associd */ 938 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 939 } 940 941 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 942 ieee80211_ies_expand(&ni->ni_ies); 943 #ifdef IEEE80211_SUPPORT_SUPERG 944 if (ni->ni_ies.ath_ie != NULL) 945 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 946 #endif 947 if (ni->ni_ies.htcap_ie != NULL) 948 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 949 if (ni->ni_ies.htinfo_ie != NULL) 950 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 951 #ifdef IEEE80211_SUPPORT_MESH 952 if (ni->ni_ies.meshid_ie != NULL) 953 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 954 #endif 955 #ifdef IEEE80211_SUPPORT_TDMA 956 if (ni->ni_ies.tdma_ie != NULL) 957 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 958 #endif 959 if (ni->ni_ies.vhtcap_ie != NULL) 960 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 961 if (ni->ni_ies.vhtopmode_ie != NULL) 962 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 963 964 /* XXX parse BSSLOAD IE */ 965 /* XXX parse TXPWRENV IE */ 966 /* XXX parse APCHANREP IE */ 967 } 968 969 vap->iv_dtim_period = se->se_dtimperiod; 970 vap->iv_dtim_count = 0; 971 972 /* NB: must be after ni_chan is setup */ 973 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 974 IEEE80211_F_DOSORT); 975 if (ieee80211_iserp_rateset(&ni->ni_rates)) 976 ni->ni_flags |= IEEE80211_NODE_ERP; 977 978 /* 979 * Setup HT state for this node if it's available, otherwise 980 * non-STA modes won't pick this state up. 981 * 982 * For IBSS and related modes that don't go through an 983 * association request/response, the only appropriate place 984 * to setup the HT state is here. 985 */ 986 if (ni->ni_ies.htinfo_ie != NULL && 987 ni->ni_ies.htcap_ie != NULL && 988 vap->iv_flags_ht & IEEE80211_FHT_HT) { 989 ieee80211_ht_node_init(ni); 990 ieee80211_ht_updateparams(ni, 991 ni->ni_ies.htcap_ie, 992 ni->ni_ies.htinfo_ie); 993 do_ht = 1; 994 } 995 996 /* 997 * Setup VHT state for this node if it's available. 998 * Same as the above. 999 * 1000 * For now, don't allow 2GHz VHT operation. 1001 */ 1002 if (ni->ni_ies.vhtopmode_ie != NULL && 1003 ni->ni_ies.vhtcap_ie != NULL && 1004 vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1005 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1006 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1007 __func__, 1008 ni->ni_macaddr, 1009 ":"); 1010 } else { 1011 ieee80211_vht_node_init(ni); 1012 ieee80211_vht_updateparams(ni, 1013 ni->ni_ies.vhtcap_ie, 1014 ni->ni_ies.vhtopmode_ie); 1015 ieee80211_setup_vht_rates(ni, ni->ni_ies.vhtcap_ie, 1016 ni->ni_ies.vhtopmode_ie); 1017 do_ht = 1; 1018 } 1019 } 1020 1021 /* Finally do the node channel change */ 1022 if (do_ht) { 1023 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1024 ni->ni_ies.htinfo_ie); 1025 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 1026 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1027 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 1028 } 1029 1030 /* XXX else check for ath FF? */ 1031 /* XXX QoS? Difficult given that WME config is specific to a master */ 1032 1033 ieee80211_node_setuptxparms(ni); 1034 ieee80211_ratectl_node_init(ni); 1035 1036 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 1037 } 1038 1039 /* 1040 * Leave the specified IBSS/BSS network. The node is assumed to 1041 * be passed in with a held reference. 1042 */ 1043 void 1044 ieee80211_sta_leave(struct ieee80211_node *ni) 1045 { 1046 struct ieee80211com *ic = ni->ni_ic; 1047 1048 ic->ic_node_cleanup(ni); 1049 ieee80211_notify_node_leave(ni); 1050 } 1051 1052 /* 1053 * Send a deauthenticate frame and drop the station. 1054 */ 1055 void 1056 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 1057 { 1058 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 1059 ieee80211_ref_node(ni); 1060 if (ni->ni_associd != 0) 1061 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 1062 ieee80211_node_leave(ni); 1063 ieee80211_free_node(ni); 1064 } 1065 1066 static struct ieee80211_node * 1067 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1068 { 1069 struct ieee80211_node *ni; 1070 1071 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), 1072 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1073 return ni; 1074 } 1075 1076 static int 1077 node_init(struct ieee80211_node *ni) 1078 { 1079 return 0; 1080 } 1081 1082 /* 1083 * Initialize an ie blob with the specified data. If previous 1084 * data exists re-use the data block. As a side effect we clear 1085 * all references to specific ie's; the caller is required to 1086 * recalculate them. 1087 */ 1088 int 1089 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 1090 { 1091 /* NB: assumes data+len are the last fields */ 1092 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 1093 if (ies->data != NULL && ies->len != len) { 1094 /* data size changed */ 1095 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1096 ies->data = NULL; 1097 } 1098 if (ies->data == NULL) { 1099 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 1100 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1101 if (ies->data == NULL) { 1102 ies->len = 0; 1103 /* NB: pointers have already been zero'd above */ 1104 return 0; 1105 } 1106 } 1107 memcpy(ies->data, data, len); 1108 ies->len = len; 1109 return 1; 1110 } 1111 1112 /* 1113 * Reclaim storage for an ie blob. 1114 */ 1115 void 1116 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 1117 { 1118 if (ies->data != NULL) 1119 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1120 } 1121 1122 /* 1123 * Expand an ie blob data contents and to fillin individual 1124 * ie pointers. The data blob is assumed to be well-formed; 1125 * we don't do any validity checking of ie lengths. 1126 */ 1127 void 1128 ieee80211_ies_expand(struct ieee80211_ies *ies) 1129 { 1130 uint8_t *ie; 1131 int ielen; 1132 1133 ie = ies->data; 1134 ielen = ies->len; 1135 while (ielen > 0) { 1136 switch (ie[0]) { 1137 case IEEE80211_ELEMID_VENDOR: 1138 if (iswpaoui(ie)) 1139 ies->wpa_ie = ie; 1140 else if (iswmeoui(ie)) 1141 ies->wme_ie = ie; 1142 #ifdef IEEE80211_SUPPORT_SUPERG 1143 else if (isatherosoui(ie)) 1144 ies->ath_ie = ie; 1145 #endif 1146 #ifdef IEEE80211_SUPPORT_TDMA 1147 else if (istdmaoui(ie)) 1148 ies->tdma_ie = ie; 1149 #endif 1150 break; 1151 case IEEE80211_ELEMID_RSN: 1152 ies->rsn_ie = ie; 1153 break; 1154 case IEEE80211_ELEMID_HTCAP: 1155 ies->htcap_ie = ie; 1156 break; 1157 case IEEE80211_ELEMID_HTINFO: 1158 ies->htinfo_ie = ie; 1159 break; 1160 #ifdef IEEE80211_SUPPORT_MESH 1161 case IEEE80211_ELEMID_MESHID: 1162 ies->meshid_ie = ie; 1163 break; 1164 #endif 1165 case IEEE80211_ELEMID_VHT_CAP: 1166 ies->vhtcap_ie = ie; 1167 break; 1168 case IEEE80211_ELEMID_VHT_OPMODE: 1169 ies->vhtopmode_ie = ie; 1170 break; 1171 case IEEE80211_ELEMID_VHT_PWR_ENV: 1172 ies->vhtpwrenv_ie = ie; 1173 break; 1174 case IEEE80211_ELEMID_BSSLOAD: 1175 ies->bssload_ie = ie; 1176 break; 1177 case IEEE80211_ELEMID_APCHANREP: 1178 ies->apchanrep_ie = ie; 1179 break; 1180 } 1181 ielen -= 2 + ie[1]; 1182 ie += 2 + ie[1]; 1183 } 1184 } 1185 1186 /* 1187 * Reclaim any resources in a node and reset any critical 1188 * state. Typically nodes are free'd immediately after, 1189 * but in some cases the storage may be reused so we need 1190 * to insure consistent state (should probably fix that). 1191 */ 1192 static void 1193 node_cleanup(struct ieee80211_node *ni) 1194 { 1195 struct ieee80211vap *vap = ni->ni_vap; 1196 struct ieee80211com *ic = ni->ni_ic; 1197 int i; 1198 1199 /* NB: preserve ni_table */ 1200 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1201 if (vap->iv_opmode != IEEE80211_M_STA) 1202 vap->iv_ps_sta--; 1203 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1204 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1205 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1206 } 1207 /* 1208 * Cleanup any VHT and HT-related state. 1209 */ 1210 if (ni->ni_flags & IEEE80211_NODE_VHT) 1211 ieee80211_vht_node_cleanup(ni); 1212 if (ni->ni_flags & IEEE80211_NODE_HT) 1213 ieee80211_ht_node_cleanup(ni); 1214 #ifdef IEEE80211_SUPPORT_SUPERG 1215 /* Always do FF node cleanup; for A-MSDU */ 1216 ieee80211_ff_node_cleanup(ni); 1217 #endif 1218 #ifdef IEEE80211_SUPPORT_MESH 1219 /* 1220 * Cleanup any mesh-related state. 1221 */ 1222 if (vap->iv_opmode == IEEE80211_M_MBSS) 1223 ieee80211_mesh_node_cleanup(ni); 1224 #endif 1225 /* 1226 * Clear any staging queue entries. 1227 */ 1228 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1229 1230 /* 1231 * Clear AREF flag that marks the authorization refcnt bump 1232 * has happened. This is probably not needed as the node 1233 * should always be removed from the table so not found but 1234 * do it just in case. 1235 * Likewise clear the ASSOCID flag as these flags are intended 1236 * to be managed in tandem. 1237 */ 1238 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1239 1240 /* 1241 * Drain power save queue and, if needed, clear TIM. 1242 */ 1243 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1244 vap->iv_set_tim(ni, 0); 1245 1246 ni->ni_associd = 0; 1247 if (ni->ni_challenge != NULL) { 1248 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1249 ni->ni_challenge = NULL; 1250 } 1251 /* 1252 * Preserve SSID, WPA, and WME ie's so the bss node is 1253 * reusable during a re-auth/re-assoc state transition. 1254 * If we remove these data they will not be recreated 1255 * because they come from a probe-response or beacon frame 1256 * which cannot be expected prior to the association-response. 1257 * This should not be an issue when operating in other modes 1258 * as stations leaving always go through a full state transition 1259 * which will rebuild this state. 1260 * 1261 * XXX does this leave us open to inheriting old state? 1262 */ 1263 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1264 if (ni->ni_rxfrag[i] != NULL) { 1265 m_freem(ni->ni_rxfrag[i]); 1266 ni->ni_rxfrag[i] = NULL; 1267 } 1268 /* 1269 * Must be careful here to remove any key map entry w/o a LOR. 1270 */ 1271 ieee80211_node_delucastkey(ni); 1272 } 1273 1274 static void 1275 node_free(struct ieee80211_node *ni) 1276 { 1277 struct ieee80211com *ic = ni->ni_ic; 1278 1279 ieee80211_ratectl_node_deinit(ni); 1280 ic->ic_node_cleanup(ni); 1281 ieee80211_ies_cleanup(&ni->ni_ies); 1282 ieee80211_psq_cleanup(&ni->ni_psq); 1283 IEEE80211_FREE(ni, M_80211_NODE); 1284 } 1285 1286 static void 1287 node_age(struct ieee80211_node *ni) 1288 { 1289 struct ieee80211vap *vap = ni->ni_vap; 1290 1291 /* 1292 * Age frames on the power save queue. 1293 */ 1294 if (ieee80211_node_psq_age(ni) != 0 && 1295 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1296 vap->iv_set_tim(ni, 0); 1297 /* 1298 * Age out HT resources (e.g. frames on the 1299 * A-MPDU reorder queues). 1300 */ 1301 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1302 ieee80211_ht_node_age(ni); 1303 } 1304 1305 static int8_t 1306 node_getrssi(const struct ieee80211_node *ni) 1307 { 1308 uint32_t avgrssi = ni->ni_avgrssi; 1309 int32_t rssi; 1310 1311 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1312 return 0; 1313 rssi = IEEE80211_RSSI_GET(avgrssi); 1314 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1315 } 1316 1317 static void 1318 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1319 { 1320 *rssi = node_getrssi(ni); 1321 *noise = ni->ni_noise; 1322 } 1323 1324 static void 1325 node_getmimoinfo(const struct ieee80211_node *ni, 1326 struct ieee80211_mimo_info *info) 1327 { 1328 int i; 1329 uint32_t avgrssi; 1330 int32_t rssi; 1331 1332 bzero(info, sizeof(*info)); 1333 1334 for (i = 0; i < MIN(IEEE80211_MAX_CHAINS, ni->ni_mimo_chains); i++) { 1335 /* Note: for now, just pri20 channel info */ 1336 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1337 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1338 info->ch[i].rssi[0] = 0; 1339 } else { 1340 rssi = IEEE80211_RSSI_GET(avgrssi); 1341 info->ch[i].rssi[0] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1342 } 1343 info->ch[i].noise[0] = ni->ni_mimo_noise_ctl[i]; 1344 } 1345 1346 /* XXX ext radios? */ 1347 1348 /* XXX EVM? */ 1349 } 1350 1351 static void 1352 ieee80211_add_node_nt(struct ieee80211_node_table *nt, 1353 struct ieee80211_node *ni) 1354 { 1355 struct ieee80211com *ic = nt->nt_ic; 1356 int hash; 1357 1358 IEEE80211_NODE_LOCK_ASSERT(nt); 1359 1360 hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr); 1361 (void) ic; /* XXX IEEE80211_NODE_HASH */ 1362 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1363 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1364 nt->nt_count++; 1365 ni->ni_table = nt; 1366 } 1367 1368 static void 1369 ieee80211_del_node_nt(struct ieee80211_node_table *nt, 1370 struct ieee80211_node *ni) 1371 { 1372 1373 IEEE80211_NODE_LOCK_ASSERT(nt); 1374 1375 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1376 LIST_REMOVE(ni, ni_hash); 1377 nt->nt_count--; 1378 KASSERT(nt->nt_count >= 0, 1379 ("nt_count is negative (%d)!\n", nt->nt_count)); 1380 ni->ni_table = NULL; 1381 } 1382 1383 struct ieee80211_node * 1384 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1385 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1386 { 1387 struct ieee80211com *ic = nt->nt_ic; 1388 struct ieee80211_node *ni; 1389 1390 ni = ic->ic_node_alloc(vap, macaddr); 1391 if (ni == NULL) { 1392 vap->iv_stats.is_rx_nodealloc++; 1393 return NULL; 1394 } 1395 1396 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1397 "%s %p<%s> in %s table\n", __func__, ni, 1398 ether_sprintf(macaddr), nt->nt_name); 1399 1400 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1401 ieee80211_node_initref(ni); /* mark referenced */ 1402 ni->ni_chan = IEEE80211_CHAN_ANYC; 1403 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1404 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1405 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1406 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1407 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1408 ni->ni_inact_reload = nt->nt_inact_init; 1409 ni->ni_inact = ni->ni_inact_reload; 1410 ni->ni_ath_defkeyix = 0x7fff; 1411 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1412 #ifdef IEEE80211_SUPPORT_MESH 1413 if (vap->iv_opmode == IEEE80211_M_MBSS) 1414 ieee80211_mesh_node_init(vap, ni); 1415 #endif 1416 IEEE80211_NODE_LOCK(nt); 1417 ieee80211_add_node_nt(nt, ni); 1418 ni->ni_vap = vap; 1419 ni->ni_ic = ic; 1420 IEEE80211_NODE_UNLOCK(nt); 1421 1422 /* handle failure; free node state */ 1423 if (ic->ic_node_init(ni) != 0) { 1424 vap->iv_stats.is_rx_nodealloc++; 1425 ieee80211_psq_cleanup(&ni->ni_psq); 1426 ieee80211_ratectl_node_deinit(ni); 1427 _ieee80211_free_node(ni); 1428 return NULL; 1429 } 1430 1431 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1432 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1433 1434 return ni; 1435 } 1436 1437 /* 1438 * Craft a temporary node suitable for sending a management frame 1439 * to the specified station. We craft only as much state as we 1440 * need to do the work since the node will be immediately reclaimed 1441 * once the send completes. 1442 */ 1443 struct ieee80211_node * 1444 ieee80211_tmp_node(struct ieee80211vap *vap, 1445 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1446 { 1447 struct ieee80211com *ic = vap->iv_ic; 1448 struct ieee80211_node *ni; 1449 1450 ni = ic->ic_node_alloc(vap, macaddr); 1451 if (ni != NULL) { 1452 struct ieee80211_node *bss = vap->iv_bss; 1453 1454 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1455 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1456 1457 ni->ni_table = NULL; /* NB: pedantic */ 1458 ni->ni_ic = ic; /* NB: needed to set channel */ 1459 ni->ni_vap = vap; 1460 1461 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1462 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1463 ieee80211_node_initref(ni); /* mark referenced */ 1464 /* NB: required by ieee80211_fix_rate */ 1465 ieee80211_node_set_chan(ni, bss->ni_chan); 1466 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1467 IEEE80211_KEYIX_NONE); 1468 ni->ni_txpower = bss->ni_txpower; 1469 /* XXX optimize away */ 1470 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1471 1472 ieee80211_ratectl_node_init(ni); 1473 1474 /* handle failure; free node state */ 1475 if (ic->ic_node_init(ni) != 0) { 1476 vap->iv_stats.is_rx_nodealloc++; 1477 ieee80211_psq_cleanup(&ni->ni_psq); 1478 ieee80211_ratectl_node_deinit(ni); 1479 _ieee80211_free_node(ni); 1480 return NULL; 1481 } 1482 1483 } else { 1484 /* XXX msg */ 1485 vap->iv_stats.is_rx_nodealloc++; 1486 } 1487 return ni; 1488 } 1489 1490 struct ieee80211_node * 1491 ieee80211_dup_bss(struct ieee80211vap *vap, 1492 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1493 { 1494 struct ieee80211com *ic = vap->iv_ic; 1495 struct ieee80211_node *ni; 1496 1497 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1498 if (ni != NULL) { 1499 struct ieee80211_node *bss = vap->iv_bss; 1500 /* 1501 * Inherit from iv_bss. 1502 */ 1503 copy_bss(ni, bss); 1504 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1505 ieee80211_node_set_chan(ni, bss->ni_chan); 1506 } 1507 return ni; 1508 } 1509 1510 /* 1511 * Create a bss node for a legacy WDS vap. The far end does 1512 * not associate so we just create create a new node and 1513 * simulate an association. The caller is responsible for 1514 * installing the node as the bss node and handling any further 1515 * setup work like authorizing the port. 1516 */ 1517 struct ieee80211_node * 1518 ieee80211_node_create_wds(struct ieee80211vap *vap, 1519 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1520 { 1521 struct ieee80211com *ic = vap->iv_ic; 1522 struct ieee80211_node *ni; 1523 1524 /* XXX check if node already in sta table? */ 1525 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1526 if (ni != NULL) { 1527 ni->ni_wdsvap = vap; 1528 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1529 /* 1530 * Inherit any manually configured settings. 1531 */ 1532 copy_bss(ni, vap->iv_bss); 1533 ieee80211_node_set_chan(ni, chan); 1534 /* NB: propagate ssid so available to WPA supplicant */ 1535 ni->ni_esslen = vap->iv_des_ssid[0].len; 1536 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1537 /* NB: no associd for peer */ 1538 /* 1539 * There are no management frames to use to 1540 * discover neighbor capabilities, so blindly 1541 * propagate the local configuration. 1542 */ 1543 if (vap->iv_flags & IEEE80211_F_WME) 1544 ni->ni_flags |= IEEE80211_NODE_QOS; 1545 #ifdef IEEE80211_SUPPORT_SUPERG 1546 if (vap->iv_flags & IEEE80211_F_FF) 1547 ni->ni_flags |= IEEE80211_NODE_FF; 1548 #endif 1549 /* XXX VHT */ 1550 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1551 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1552 /* 1553 * Device is HT-capable and HT is enabled for 1554 * the vap; setup HT operation. On return 1555 * ni_chan will be adjusted to an HT channel. 1556 */ 1557 ieee80211_ht_wds_init(ni); 1558 if (vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1559 printf("%s: TODO: vht_wds_init\n", __func__); 1560 } 1561 } else { 1562 struct ieee80211_channel *c = ni->ni_chan; 1563 /* 1564 * Force a legacy channel to be used. 1565 */ 1566 c = ieee80211_find_channel(ic, 1567 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1568 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1569 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1570 ni->ni_chan = c; 1571 } 1572 } 1573 return ni; 1574 } 1575 1576 struct ieee80211_node * 1577 #ifdef IEEE80211_DEBUG_REFCNT 1578 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1579 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1580 #else 1581 ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1582 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1583 #endif 1584 { 1585 struct ieee80211_node *ni; 1586 int hash; 1587 1588 IEEE80211_NODE_LOCK_ASSERT(nt); 1589 1590 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1591 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1592 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1593 ieee80211_ref_node(ni); /* mark referenced */ 1594 #ifdef IEEE80211_DEBUG_REFCNT 1595 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1596 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1597 func, line, 1598 ni, ether_sprintf(ni->ni_macaddr), 1599 ieee80211_node_refcnt(ni)); 1600 #endif 1601 return ni; 1602 } 1603 } 1604 return NULL; 1605 } 1606 1607 struct ieee80211_node * 1608 #ifdef IEEE80211_DEBUG_REFCNT 1609 ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1610 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1611 #else 1612 ieee80211_find_node(struct ieee80211_node_table *nt, 1613 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1614 #endif 1615 { 1616 struct ieee80211_node *ni; 1617 1618 IEEE80211_NODE_LOCK(nt); 1619 ni = ieee80211_find_node_locked(nt, macaddr); 1620 IEEE80211_NODE_UNLOCK(nt); 1621 return ni; 1622 } 1623 1624 struct ieee80211_node * 1625 #ifdef IEEE80211_DEBUG_REFCNT 1626 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1627 const struct ieee80211vap *vap, 1628 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1629 #else 1630 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1631 const struct ieee80211vap *vap, 1632 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1633 #endif 1634 { 1635 struct ieee80211_node *ni; 1636 int hash; 1637 1638 IEEE80211_NODE_LOCK_ASSERT(nt); 1639 1640 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1641 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1642 if (ni->ni_vap == vap && 1643 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1644 ieee80211_ref_node(ni); /* mark referenced */ 1645 #ifdef IEEE80211_DEBUG_REFCNT 1646 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1647 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1648 func, line, 1649 ni, ether_sprintf(ni->ni_macaddr), 1650 ieee80211_node_refcnt(ni)); 1651 #endif 1652 return ni; 1653 } 1654 } 1655 return NULL; 1656 } 1657 1658 struct ieee80211_node * 1659 #ifdef IEEE80211_DEBUG_REFCNT 1660 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1661 const struct ieee80211vap *vap, 1662 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1663 #else 1664 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1665 const struct ieee80211vap *vap, 1666 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1667 #endif 1668 { 1669 struct ieee80211_node *ni; 1670 1671 IEEE80211_NODE_LOCK(nt); 1672 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1673 IEEE80211_NODE_UNLOCK(nt); 1674 return ni; 1675 } 1676 1677 /* 1678 * Fake up a node; this handles node discovery in adhoc mode. 1679 * Note that for the driver's benefit we we treat this like 1680 * an association so the driver has an opportunity to setup 1681 * it's private state. 1682 */ 1683 struct ieee80211_node * 1684 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1685 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1686 { 1687 struct ieee80211_node *ni; 1688 1689 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1690 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1691 ni = ieee80211_dup_bss(vap, macaddr); 1692 if (ni != NULL) { 1693 struct ieee80211com *ic = vap->iv_ic; 1694 1695 /* XXX no rate negotiation; just dup */ 1696 ni->ni_rates = vap->iv_bss->ni_rates; 1697 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1698 ni->ni_flags |= IEEE80211_NODE_ERP; 1699 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1700 /* 1701 * In adhoc demo mode there are no management 1702 * frames to use to discover neighbor capabilities, 1703 * so blindly propagate the local configuration 1704 * so we can do interesting things (e.g. use 1705 * WME to disable ACK's). 1706 */ 1707 /* 1708 * XXX TODO: 11n? 1709 */ 1710 if (vap->iv_flags & IEEE80211_F_WME) 1711 ni->ni_flags |= IEEE80211_NODE_QOS; 1712 #ifdef IEEE80211_SUPPORT_SUPERG 1713 if (vap->iv_flags & IEEE80211_F_FF) 1714 ni->ni_flags |= IEEE80211_NODE_FF; 1715 #endif 1716 } 1717 ieee80211_node_setuptxparms(ni); 1718 ieee80211_ratectl_node_init(ni); 1719 1720 /* 1721 * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX, 1722 * not A-MPDU TX; not 11n rates, etc. We'll cycle 1723 * that after we hear that we can indeed do 11n 1724 * (either by a beacon frame or by a probe response.) 1725 */ 1726 1727 /* 1728 * This is the first time we see the node. 1729 */ 1730 if (ic->ic_newassoc != NULL) 1731 ic->ic_newassoc(ni, 1); 1732 1733 /* 1734 * Kick off a probe request to the given node; 1735 * we will then use the probe response to update 1736 * 11n/etc configuration state. 1737 * 1738 * XXX TODO: this isn't guaranteed, and until we get 1739 * a probe response, we won't be able to actually 1740 * do anything 802.11n related to the node. 1741 * So if this does indeed work, maybe we should hold 1742 * off on sending responses until we get the probe 1743 * response, or just default to some sensible subset 1744 * of 802.11n behaviour (eg always allow aggregation 1745 * negotiation TO us, but not FROM us, etc) so we 1746 * aren't entirely busted. 1747 */ 1748 if (vap->iv_opmode == IEEE80211_M_IBSS) { 1749 ieee80211_send_probereq(ni, /* node */ 1750 vap->iv_myaddr, /* SA */ 1751 ni->ni_macaddr, /* DA */ 1752 vap->iv_bss->ni_bssid, /* BSSID */ 1753 vap->iv_bss->ni_essid, 1754 vap->iv_bss->ni_esslen); /* SSID */ 1755 } 1756 1757 /* XXX not right for 802.1x/WPA */ 1758 ieee80211_node_authorize(ni); 1759 } 1760 return ni; 1761 } 1762 1763 void 1764 ieee80211_init_neighbor(struct ieee80211_node *ni, 1765 const struct ieee80211_frame *wh, 1766 const struct ieee80211_scanparams *sp) 1767 { 1768 int do_ht_setup = 0, do_vht_setup = 0; 1769 1770 ni->ni_esslen = sp->ssid[1]; 1771 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1772 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1773 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1774 ni->ni_intval = sp->bintval; 1775 ni->ni_capinfo = sp->capinfo; 1776 ni->ni_chan = ni->ni_ic->ic_curchan; 1777 ni->ni_fhdwell = sp->fhdwell; 1778 ni->ni_fhindex = sp->fhindex; 1779 ni->ni_erp = sp->erp; 1780 ni->ni_timoff = sp->timoff; 1781 #ifdef IEEE80211_SUPPORT_MESH 1782 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1783 ieee80211_mesh_init_neighbor(ni, wh, sp); 1784 #endif 1785 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1786 ieee80211_ies_expand(&ni->ni_ies); 1787 if (ni->ni_ies.wme_ie != NULL) 1788 ni->ni_flags |= IEEE80211_NODE_QOS; 1789 else 1790 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1791 #ifdef IEEE80211_SUPPORT_SUPERG 1792 if (ni->ni_ies.ath_ie != NULL) 1793 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1794 #endif 1795 if (ni->ni_ies.htcap_ie != NULL) 1796 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1797 if (ni->ni_ies.htinfo_ie != NULL) 1798 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1799 1800 if (ni->ni_ies.vhtcap_ie != NULL) 1801 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 1802 if (ni->ni_ies.vhtopmode_ie != NULL) 1803 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 1804 1805 if ((ni->ni_ies.htcap_ie != NULL) && 1806 (ni->ni_ies.htinfo_ie != NULL) && 1807 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1808 do_ht_setup = 1; 1809 } 1810 1811 if ((ni->ni_ies.vhtcap_ie != NULL) && 1812 (ni->ni_ies.vhtopmode_ie != NULL) && 1813 (ni->ni_vap->iv_flags_vht & IEEE80211_FVHT_VHT)) { 1814 do_vht_setup = 1; 1815 } 1816 } 1817 1818 /* NB: must be after ni_chan is setup */ 1819 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1820 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1821 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1822 1823 /* 1824 * If the neighbor is HT compatible, flip that on. 1825 */ 1826 if (do_ht_setup) { 1827 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1828 "%s: doing HT setup\n", __func__); 1829 ieee80211_ht_node_init(ni); 1830 ieee80211_ht_updateparams(ni, 1831 ni->ni_ies.htcap_ie, 1832 ni->ni_ies.htinfo_ie); 1833 1834 if (do_vht_setup) { 1835 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1836 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1837 __func__, 1838 ni->ni_macaddr, 1839 ":"); 1840 } else { 1841 ieee80211_vht_node_init(ni); 1842 ieee80211_vht_updateparams(ni, 1843 ni->ni_ies.vhtcap_ie, 1844 ni->ni_ies.vhtopmode_ie); 1845 ieee80211_setup_vht_rates(ni, 1846 ni->ni_ies.vhtcap_ie, 1847 ni->ni_ies.vhtopmode_ie); 1848 } 1849 } 1850 1851 /* 1852 * Finally do the channel upgrade/change based 1853 * on the HT/VHT configuration. 1854 */ 1855 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1856 ni->ni_ies.htinfo_ie); 1857 ieee80211_setup_htrates(ni, 1858 ni->ni_ies.htcap_ie, 1859 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1860 ieee80211_setup_basic_htrates(ni, 1861 ni->ni_ies.htinfo_ie); 1862 1863 ieee80211_node_setuptxparms(ni); 1864 ieee80211_ratectl_node_init(ni); 1865 1866 /* Reassociate; we're now 11n/11ac */ 1867 /* 1868 * XXX TODO: this is the wrong thing to do - 1869 * we're calling it with isnew=1 so the ath(4) 1870 * driver reinitialises the rate tables. 1871 * This "mostly" works for ath(4), but it won't 1872 * be right for firmware devices which allocate 1873 * node states. 1874 * 1875 * So, do we just create a new node and delete 1876 * the old one? Or? 1877 */ 1878 if (ni->ni_ic->ic_newassoc) 1879 ni->ni_ic->ic_newassoc(ni, 1); 1880 } 1881 } 1882 1883 /* 1884 * Do node discovery in adhoc mode on receipt of a beacon 1885 * or probe response frame. Note that for the driver's 1886 * benefit we we treat this like an association so the 1887 * driver has an opportunity to setup it's private state. 1888 */ 1889 struct ieee80211_node * 1890 ieee80211_add_neighbor(struct ieee80211vap *vap, 1891 const struct ieee80211_frame *wh, 1892 const struct ieee80211_scanparams *sp) 1893 { 1894 struct ieee80211_node *ni; 1895 1896 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1897 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1898 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1899 if (ni != NULL) { 1900 struct ieee80211com *ic = vap->iv_ic; 1901 1902 ieee80211_init_neighbor(ni, wh, sp); 1903 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1904 ni->ni_flags |= IEEE80211_NODE_ERP; 1905 ieee80211_node_setuptxparms(ni); 1906 ieee80211_ratectl_node_init(ni); 1907 if (ic->ic_newassoc != NULL) 1908 ic->ic_newassoc(ni, 1); 1909 /* XXX not right for 802.1x/WPA */ 1910 ieee80211_node_authorize(ni); 1911 } 1912 return ni; 1913 } 1914 1915 #define IS_PROBEREQ(wh) \ 1916 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1917 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1918 #define IS_BCAST_PROBEREQ(wh) \ 1919 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1920 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1921 1922 static __inline struct ieee80211_node * 1923 _find_rxnode(struct ieee80211_node_table *nt, 1924 const struct ieee80211_frame_min *wh) 1925 { 1926 if (IS_BCAST_PROBEREQ(wh)) 1927 return NULL; /* spam bcast probe req to all vap's */ 1928 return ieee80211_find_node_locked(nt, wh->i_addr2); 1929 } 1930 1931 /* 1932 * Locate the node for sender, track state, and then pass the 1933 * (referenced) node up to the 802.11 layer for its use. Note 1934 * we can return NULL if the sender is not in the table. 1935 */ 1936 struct ieee80211_node * 1937 #ifdef IEEE80211_DEBUG_REFCNT 1938 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1939 const struct ieee80211_frame_min *wh, const char *func, int line) 1940 #else 1941 ieee80211_find_rxnode(struct ieee80211com *ic, 1942 const struct ieee80211_frame_min *wh) 1943 #endif 1944 { 1945 struct ieee80211_node_table *nt; 1946 struct ieee80211_node *ni; 1947 1948 nt = &ic->ic_sta; 1949 IEEE80211_NODE_LOCK(nt); 1950 ni = _find_rxnode(nt, wh); 1951 IEEE80211_NODE_UNLOCK(nt); 1952 1953 return ni; 1954 } 1955 1956 /* 1957 * Like ieee80211_find_rxnode but use the supplied h/w 1958 * key index as a hint to locate the node in the key 1959 * mapping table. If an entry is present at the key 1960 * index we return it; otherwise do a normal lookup and 1961 * update the mapping table if the station has a unicast 1962 * key assigned to it. 1963 */ 1964 struct ieee80211_node * 1965 #ifdef IEEE80211_DEBUG_REFCNT 1966 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1967 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1968 const char *func, int line) 1969 #else 1970 ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1971 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1972 #endif 1973 { 1974 struct ieee80211_node_table *nt; 1975 struct ieee80211_node *ni; 1976 1977 nt = &ic->ic_sta; 1978 IEEE80211_NODE_LOCK(nt); 1979 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1980 ni = nt->nt_keyixmap[keyix]; 1981 else 1982 ni = NULL; 1983 if (ni == NULL) { 1984 ni = _find_rxnode(nt, wh); 1985 if (ni != NULL && nt->nt_keyixmap != NULL) { 1986 /* 1987 * If the station has a unicast key cache slot 1988 * assigned update the key->node mapping table. 1989 */ 1990 keyix = ni->ni_ucastkey.wk_rxkeyix; 1991 /* XXX can keyixmap[keyix] != NULL? */ 1992 if (keyix < nt->nt_keyixmax && 1993 nt->nt_keyixmap[keyix] == NULL) { 1994 IEEE80211_DPRINTF(ni->ni_vap, 1995 IEEE80211_MSG_NODE, 1996 "%s: add key map entry %p<%s> refcnt %d\n", 1997 __func__, ni, ether_sprintf(ni->ni_macaddr), 1998 ieee80211_node_refcnt(ni)+1); 1999 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 2000 } 2001 } 2002 } else { 2003 if (IS_BCAST_PROBEREQ(wh)) 2004 ni = NULL; /* spam bcast probe req to all vap's */ 2005 else 2006 ieee80211_ref_node(ni); 2007 } 2008 IEEE80211_NODE_UNLOCK(nt); 2009 2010 return ni; 2011 } 2012 #undef IS_BCAST_PROBEREQ 2013 #undef IS_PROBEREQ 2014 2015 /* 2016 * Return a reference to the appropriate node for sending 2017 * a data frame. This handles node discovery in adhoc networks. 2018 */ 2019 struct ieee80211_node * 2020 #ifdef IEEE80211_DEBUG_REFCNT 2021 ieee80211_find_txnode_debug(struct ieee80211vap *vap, 2022 const uint8_t macaddr[IEEE80211_ADDR_LEN], 2023 const char *func, int line) 2024 #else 2025 ieee80211_find_txnode(struct ieee80211vap *vap, 2026 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 2027 #endif 2028 { 2029 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 2030 struct ieee80211_node *ni; 2031 2032 /* 2033 * The destination address should be in the node table 2034 * unless this is a multicast/broadcast frame. We can 2035 * also optimize station mode operation, all frames go 2036 * to the bss node. 2037 */ 2038 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 2039 IEEE80211_NODE_LOCK(nt); 2040 if (vap->iv_opmode == IEEE80211_M_STA || 2041 vap->iv_opmode == IEEE80211_M_WDS || 2042 IEEE80211_IS_MULTICAST(macaddr)) 2043 ni = ieee80211_ref_node(vap->iv_bss); 2044 else 2045 ni = ieee80211_find_node_locked(nt, macaddr); 2046 IEEE80211_NODE_UNLOCK(nt); 2047 2048 if (ni == NULL) { 2049 if (vap->iv_opmode == IEEE80211_M_IBSS || 2050 vap->iv_opmode == IEEE80211_M_AHDEMO) { 2051 /* 2052 * In adhoc mode cons up a node for the destination. 2053 * Note that we need an additional reference for the 2054 * caller to be consistent with 2055 * ieee80211_find_node_locked. 2056 */ 2057 /* 2058 * XXX TODO: this doesn't fake up 11n state; we need 2059 * to find another way to get it upgraded. 2060 */ 2061 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 2062 if (ni != NULL) 2063 (void) ieee80211_ref_node(ni); 2064 } else { 2065 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 2066 "no node, discard frame (%s)", __func__); 2067 vap->iv_stats.is_tx_nonode++; 2068 } 2069 } 2070 return ni; 2071 } 2072 2073 static void 2074 _ieee80211_free_node(struct ieee80211_node *ni) 2075 { 2076 struct ieee80211_node_table *nt = ni->ni_table; 2077 2078 /* 2079 * NB: careful about referencing the vap as it may be 2080 * gone if the last reference was held by a driver. 2081 * We know the com will always be present so it's safe 2082 * to use ni_ic below to reclaim resources. 2083 */ 2084 #if 0 2085 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2086 "%s %p<%s> in %s table\n", __func__, ni, 2087 ether_sprintf(ni->ni_macaddr), 2088 nt != NULL ? nt->nt_name : "<gone>"); 2089 #endif 2090 if (ni->ni_associd != 0) { 2091 struct ieee80211vap *vap = ni->ni_vap; 2092 if (vap->iv_aid_bitmap != NULL) 2093 IEEE80211_AID_CLR(vap, ni->ni_associd); 2094 } 2095 if (nt != NULL) 2096 ieee80211_del_node_nt(nt, ni); 2097 ni->ni_ic->ic_node_free(ni); 2098 } 2099 2100 /* 2101 * Clear any entry in the unicast key mapping table. 2102 */ 2103 static int 2104 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2105 { 2106 ieee80211_keyix keyix; 2107 2108 keyix = ni->ni_ucastkey.wk_rxkeyix; 2109 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 2110 nt->nt_keyixmap[keyix] == ni) { 2111 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2112 "%s: %p<%s> clear key map entry %u\n", 2113 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 2114 nt->nt_keyixmap[keyix] = NULL; 2115 ieee80211_node_decref(ni); 2116 return 1; 2117 } 2118 2119 return 0; 2120 } 2121 2122 void 2123 #ifdef IEEE80211_DEBUG_REFCNT 2124 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 2125 #else 2126 ieee80211_free_node(struct ieee80211_node *ni) 2127 #endif 2128 { 2129 struct ieee80211_node_table *nt = ni->ni_table; 2130 2131 #ifdef IEEE80211_DEBUG_REFCNT 2132 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2133 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 2134 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 2135 #endif 2136 if (nt != NULL) { 2137 IEEE80211_NODE_LOCK(nt); 2138 if (ieee80211_node_dectestref(ni)) { 2139 /* 2140 * Last reference, reclaim state. 2141 */ 2142 _ieee80211_free_node(ni); 2143 } else if (ieee80211_node_refcnt(ni) == 1) 2144 if (node_clear_keyixmap(nt, ni)) 2145 _ieee80211_free_node(ni); 2146 IEEE80211_NODE_UNLOCK(nt); 2147 } else { 2148 if (ieee80211_node_dectestref(ni)) 2149 _ieee80211_free_node(ni); 2150 } 2151 } 2152 2153 /* 2154 * Reclaim a unicast key and clear any key cache state. 2155 */ 2156 int 2157 ieee80211_node_delucastkey(struct ieee80211_node *ni) 2158 { 2159 struct ieee80211com *ic = ni->ni_ic; 2160 struct ieee80211_node_table *nt = &ic->ic_sta; 2161 struct ieee80211_node *nikey; 2162 ieee80211_keyix keyix; 2163 int isowned, status; 2164 2165 /* 2166 * NB: We must beware of LOR here; deleting the key 2167 * can cause the crypto layer to block traffic updates 2168 * which can generate a LOR against the node table lock; 2169 * grab it here and stash the key index for our use below. 2170 * 2171 * Must also beware of recursion on the node table lock. 2172 * When called from node_cleanup we may already have 2173 * the node table lock held. Unfortunately there's no 2174 * way to separate out this path so we must do this 2175 * conditionally. 2176 */ 2177 isowned = IEEE80211_NODE_IS_LOCKED(nt); 2178 if (!isowned) 2179 IEEE80211_NODE_LOCK(nt); 2180 nikey = NULL; 2181 status = 1; /* NB: success */ 2182 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 2183 keyix = ni->ni_ucastkey.wk_rxkeyix; 2184 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 2185 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 2186 nikey = nt->nt_keyixmap[keyix]; 2187 nt->nt_keyixmap[keyix] = NULL; 2188 } 2189 } 2190 if (!isowned) 2191 IEEE80211_NODE_UNLOCK(nt); 2192 2193 if (nikey != NULL) { 2194 KASSERT(nikey == ni, 2195 ("key map out of sync, ni %p nikey %p", ni, nikey)); 2196 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2197 "%s: delete key map entry %p<%s> refcnt %d\n", 2198 __func__, ni, ether_sprintf(ni->ni_macaddr), 2199 ieee80211_node_refcnt(ni)-1); 2200 ieee80211_free_node(ni); 2201 } 2202 return status; 2203 } 2204 2205 /* 2206 * Reclaim a node. If this is the last reference count then 2207 * do the normal free work. Otherwise remove it from the node 2208 * table and mark it gone by clearing the back-reference. 2209 */ 2210 static void 2211 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2212 { 2213 2214 IEEE80211_NODE_LOCK_ASSERT(nt); 2215 2216 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2217 "%s: remove %p<%s> from %s table, refcnt %d\n", 2218 __func__, ni, ether_sprintf(ni->ni_macaddr), 2219 nt->nt_name, ieee80211_node_refcnt(ni)-1); 2220 /* 2221 * Clear any entry in the unicast key mapping table. 2222 * We need to do it here so rx lookups don't find it 2223 * in the mapping table even if it's not in the hash 2224 * table. We cannot depend on the mapping table entry 2225 * being cleared because the node may not be free'd. 2226 */ 2227 (void)node_clear_keyixmap(nt, ni); 2228 if (!ieee80211_node_dectestref(ni)) { 2229 /* 2230 * Other references are present, just remove the 2231 * node from the table so it cannot be found. When 2232 * the references are dropped storage will be 2233 * reclaimed. 2234 */ 2235 ieee80211_del_node_nt(nt, ni); 2236 } else 2237 _ieee80211_free_node(ni); 2238 } 2239 2240 /* 2241 * Node table support. 2242 */ 2243 2244 static void 2245 ieee80211_node_table_init(struct ieee80211com *ic, 2246 struct ieee80211_node_table *nt, 2247 const char *name, int inact, int keyixmax) 2248 { 2249 2250 nt->nt_ic = ic; 2251 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 2252 TAILQ_INIT(&nt->nt_node); 2253 nt->nt_count = 0; 2254 nt->nt_name = name; 2255 nt->nt_inact_init = inact; 2256 nt->nt_keyixmax = keyixmax; 2257 if (nt->nt_keyixmax > 0) { 2258 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 2259 keyixmax * sizeof(struct ieee80211_node *), 2260 M_80211_NODE, 2261 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2262 if (nt->nt_keyixmap == NULL) 2263 ic_printf(ic, 2264 "Cannot allocate key index map with %u entries\n", 2265 keyixmax); 2266 } else 2267 nt->nt_keyixmap = NULL; 2268 } 2269 2270 static void 2271 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 2272 struct ieee80211vap *match) 2273 { 2274 struct ieee80211_node *ni, *next; 2275 2276 IEEE80211_NODE_LOCK(nt); 2277 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 2278 if (match != NULL && ni->ni_vap != match) 2279 continue; 2280 /* XXX can this happen? if so need's work */ 2281 if (ni->ni_associd != 0) { 2282 struct ieee80211vap *vap = ni->ni_vap; 2283 2284 if (vap->iv_auth->ia_node_leave != NULL) 2285 vap->iv_auth->ia_node_leave(ni); 2286 if (vap->iv_aid_bitmap != NULL) 2287 IEEE80211_AID_CLR(vap, ni->ni_associd); 2288 } 2289 ni->ni_wdsvap = NULL; /* clear reference */ 2290 node_reclaim(nt, ni); 2291 } 2292 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 2293 /* 2294 * Make a separate pass to clear references to this vap 2295 * held by DWDS entries. They will not be matched above 2296 * because ni_vap will point to the ap vap but we still 2297 * need to clear ni_wdsvap when the WDS vap is destroyed 2298 * and/or reset. 2299 */ 2300 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 2301 if (ni->ni_wdsvap == match) 2302 ni->ni_wdsvap = NULL; 2303 } 2304 IEEE80211_NODE_UNLOCK(nt); 2305 } 2306 2307 static void 2308 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2309 { 2310 ieee80211_node_table_reset(nt, NULL); 2311 if (nt->nt_keyixmap != NULL) { 2312 #ifdef DIAGNOSTIC 2313 /* XXX verify all entries are NULL */ 2314 int i; 2315 for (i = 0; i < nt->nt_keyixmax; i++) 2316 if (nt->nt_keyixmap[i] != NULL) 2317 printf("%s: %s[%u] still active\n", __func__, 2318 nt->nt_name, i); 2319 #endif 2320 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 2321 nt->nt_keyixmap = NULL; 2322 } 2323 IEEE80211_NODE_LOCK_DESTROY(nt); 2324 } 2325 2326 static void 2327 timeout_stations(void *arg __unused, struct ieee80211_node *ni) 2328 { 2329 struct ieee80211com *ic = ni->ni_ic; 2330 struct ieee80211vap *vap = ni->ni_vap; 2331 2332 /* 2333 * Only process stations when in RUN state. This 2334 * insures, for example, that we don't timeout an 2335 * inactive station during CAC. Note that CSA state 2336 * is actually handled in ieee80211_node_timeout as 2337 * it applies to more than timeout processing. 2338 */ 2339 if (vap->iv_state != IEEE80211_S_RUN) 2340 return; 2341 /* 2342 * Ignore entries for which have yet to receive an 2343 * authentication frame. These are transient and 2344 * will be reclaimed when the last reference to them 2345 * goes away (when frame xmits complete). 2346 */ 2347 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2348 vap->iv_opmode == IEEE80211_M_STA) && 2349 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2350 return; 2351 /* 2352 * Free fragment if not needed anymore 2353 * (last fragment older than 1s). 2354 * XXX doesn't belong here, move to node_age 2355 */ 2356 if (ni->ni_rxfrag[0] != NULL && 2357 ticks > ni->ni_rxfragstamp + hz) { 2358 m_freem(ni->ni_rxfrag[0]); 2359 ni->ni_rxfrag[0] = NULL; 2360 } 2361 if (ni->ni_inact > 0) { 2362 ni->ni_inact--; 2363 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2364 "%s: inact %u inact_reload %u nrates %u", 2365 __func__, ni->ni_inact, ni->ni_inact_reload, 2366 ni->ni_rates.rs_nrates); 2367 } 2368 /* 2369 * Special case ourself; we may be idle for extended periods 2370 * of time and regardless reclaiming our state is wrong. 2371 * XXX run ic_node_age 2372 */ 2373 /* XXX before inact decrement? */ 2374 if (ni == vap->iv_bss) 2375 return; 2376 if (ni->ni_associd != 0 || 2377 (vap->iv_opmode == IEEE80211_M_IBSS || 2378 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2379 /* 2380 * Age/drain resources held by the station. 2381 */ 2382 ic->ic_node_age(ni); 2383 /* 2384 * Probe the station before time it out. We 2385 * send a null data frame which may not be 2386 * universally supported by drivers (need it 2387 * for ps-poll support so it should be...). 2388 * 2389 * XXX don't probe the station unless we've 2390 * received a frame from them (and have 2391 * some idea of the rates they are capable 2392 * of); this will get fixed more properly 2393 * soon with better handling of the rate set. 2394 */ 2395 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2396 (0 < ni->ni_inact && 2397 ni->ni_inact <= vap->iv_inact_probe) && 2398 ni->ni_rates.rs_nrates != 0) { 2399 IEEE80211_NOTE(vap, 2400 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2401 ni, "%s", 2402 "probe station due to inactivity"); 2403 /* 2404 * Grab a reference so the node cannot 2405 * be reclaimed before we send the frame. 2406 * ieee80211_send_nulldata understands 2407 * we've done this and reclaims the 2408 * ref for us as needed. 2409 */ 2410 /* XXX fix this (not required anymore). */ 2411 ieee80211_ref_node(ni); 2412 /* XXX useless */ 2413 ieee80211_send_nulldata(ni); 2414 /* XXX stat? */ 2415 return; 2416 } 2417 } 2418 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2419 ni->ni_inact <= 0) { 2420 IEEE80211_NOTE(vap, 2421 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2422 "station timed out due to inactivity " 2423 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2424 /* 2425 * Send a deauthenticate frame and drop the station. 2426 * This is somewhat complicated due to reference counts 2427 * and locking. At this point a station will typically 2428 * have a reference count of 2. ieee80211_node_leave 2429 * will do a "free" of the node which will drop the 2430 * reference count. But in the meantime a reference 2431 * wil be held by the deauth frame. The actual reclaim 2432 * of the node will happen either after the tx is 2433 * completed or by ieee80211_node_leave. 2434 */ 2435 if (ni->ni_associd != 0) { 2436 IEEE80211_SEND_MGMT(ni, 2437 IEEE80211_FC0_SUBTYPE_DEAUTH, 2438 IEEE80211_REASON_AUTH_EXPIRE); 2439 } 2440 ieee80211_node_leave(ni); 2441 vap->iv_stats.is_node_timeout++; 2442 } 2443 } 2444 2445 /* 2446 * Timeout inactive stations and do related housekeeping. 2447 */ 2448 static void 2449 ieee80211_timeout_stations(struct ieee80211com *ic) 2450 { 2451 struct ieee80211_node_table *nt = &ic->ic_sta; 2452 2453 ieee80211_iterate_nodes(nt, timeout_stations, NULL); 2454 } 2455 2456 /* 2457 * Aggressively reclaim resources. This should be used 2458 * only in a critical situation to reclaim mbuf resources. 2459 */ 2460 void 2461 ieee80211_drain(struct ieee80211com *ic) 2462 { 2463 struct ieee80211_node_table *nt = &ic->ic_sta; 2464 struct ieee80211vap *vap; 2465 struct ieee80211_node *ni; 2466 2467 IEEE80211_NODE_LOCK(nt); 2468 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2469 /* 2470 * Ignore entries for which have yet to receive an 2471 * authentication frame. These are transient and 2472 * will be reclaimed when the last reference to them 2473 * goes away (when frame xmits complete). 2474 */ 2475 vap = ni->ni_vap; 2476 /* 2477 * Only process stations when in RUN state. This 2478 * insures, for example, that we don't timeout an 2479 * inactive station during CAC. Note that CSA state 2480 * is actually handled in ieee80211_node_timeout as 2481 * it applies to more than timeout processing. 2482 */ 2483 if (vap->iv_state != IEEE80211_S_RUN) 2484 continue; 2485 /* XXX can vap be NULL? */ 2486 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2487 vap->iv_opmode == IEEE80211_M_STA) && 2488 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2489 continue; 2490 /* 2491 * Free fragments. 2492 * XXX doesn't belong here, move to node_drain 2493 */ 2494 if (ni->ni_rxfrag[0] != NULL) { 2495 m_freem(ni->ni_rxfrag[0]); 2496 ni->ni_rxfrag[0] = NULL; 2497 } 2498 /* 2499 * Drain resources held by the station. 2500 */ 2501 ic->ic_node_drain(ni); 2502 } 2503 IEEE80211_NODE_UNLOCK(nt); 2504 } 2505 2506 /* 2507 * Per-ieee80211vap inactivity timer callback. 2508 */ 2509 static void 2510 ieee80211_vap_timeout(struct ieee80211vap *vap) 2511 { 2512 2513 IEEE80211_LOCK_ASSERT(vap->iv_ic); 2514 2515 ieee80211_vap_erp_timeout(vap); 2516 ieee80211_ht_timeout(vap); 2517 ieee80211_vht_timeout(vap); 2518 } 2519 2520 /* 2521 * Per-ieee80211com inactivity timer callback. 2522 */ 2523 void 2524 ieee80211_node_timeout(void *arg) 2525 { 2526 struct ieee80211com *ic = arg; 2527 struct ieee80211vap *vap; 2528 2529 /* 2530 * Defer timeout processing if a channel switch is pending. 2531 * We typically need to be mute so not doing things that 2532 * might generate frames is good to handle in one place. 2533 * Suppressing the station timeout processing may extend the 2534 * lifetime of inactive stations (by not decrementing their 2535 * idle counters) but this should be ok unless the CSA is 2536 * active for an unusually long time. 2537 */ 2538 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2539 ieee80211_scan_timeout(ic); 2540 ieee80211_timeout_stations(ic); 2541 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2542 2543 IEEE80211_LOCK(ic); 2544 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2545 ieee80211_vap_timeout(vap); 2546 IEEE80211_UNLOCK(ic); 2547 } 2548 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2549 ieee80211_node_timeout, ic); 2550 } 2551 2552 /* 2553 * The same as ieee80211_iterate_nodes(), but for one vap only. 2554 */ 2555 int 2556 ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt, 2557 struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg) 2558 { 2559 struct ieee80211_node **ni_arr; 2560 struct ieee80211_node *ni; 2561 size_t size; 2562 int count, i; 2563 2564 /* 2565 * Iterate over the node table and save an array of ref'ed nodes. 2566 * 2567 * This is separated out from calling the actual node function so that 2568 * no LORs will occur. 2569 */ 2570 IEEE80211_NODE_LOCK(nt); 2571 count = nt->nt_count; 2572 size = count * sizeof(struct ieee80211_node *); 2573 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2574 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2575 if (ni_arr == NULL) { 2576 IEEE80211_NODE_UNLOCK(nt); 2577 return (ENOMEM); 2578 } 2579 2580 i = 0; 2581 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2582 if (vap != NULL && ni->ni_vap != vap) 2583 continue; 2584 KASSERT(i < count, 2585 ("node array overflow (vap %p, i %d, count %d)\n", 2586 vap, i, count)); 2587 ni_arr[i] = ieee80211_ref_node(ni); 2588 i++; 2589 } 2590 IEEE80211_NODE_UNLOCK(nt); 2591 2592 for (i = 0; i < count; i++) { 2593 if (ni_arr[i] == NULL) /* end of the list */ 2594 break; 2595 (*f)(arg, ni_arr[i]); 2596 /* ieee80211_free_node() locks by itself */ 2597 ieee80211_free_node(ni_arr[i]); 2598 } 2599 2600 IEEE80211_FREE(ni_arr, M_80211_NODE); 2601 2602 return (0); 2603 } 2604 2605 /* 2606 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2607 * reference in the source. 2608 */ 2609 void 2610 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2611 ieee80211_iter_func *f, void *arg) 2612 { 2613 /* XXX no way to pass error to the caller. */ 2614 (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg); 2615 } 2616 2617 void 2618 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2619 { 2620 printf("0x%p: mac %s refcnt %d\n", ni, 2621 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2622 printf("\tauthmode %u flags 0x%x\n", 2623 ni->ni_authmode, ni->ni_flags); 2624 printf("\tassocid 0x%x txpower %u vlan %u\n", 2625 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2626 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2627 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2628 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2629 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2630 ni->ni_rxfragstamp); 2631 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2632 node_getrssi(ni), ni->ni_noise, 2633 ni->ni_intval, ni->ni_capinfo); 2634 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2635 ether_sprintf(ni->ni_bssid), 2636 ni->ni_esslen, ni->ni_essid, 2637 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2638 printf("\tinact %u inact_reload %u txrate %u\n", 2639 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2640 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2641 ni->ni_htcap, ni->ni_htparam, 2642 ni->ni_htctlchan, ni->ni_ht2ndchan); 2643 printf("\thtopmode %x htstbc %x htchw %u\n", 2644 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2645 printf("\tvhtcap %x freq1 %d freq2 %d vhtbasicmcs %x\n", 2646 ni->ni_vhtcap, (int) ni->ni_vht_chan1, (int) ni->ni_vht_chan2, 2647 (int) ni->ni_vht_basicmcs); 2648 /* XXX VHT state */ 2649 } 2650 2651 void 2652 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2653 { 2654 ieee80211_iterate_nodes(nt, 2655 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2656 } 2657 2658 /* 2659 * Iterate over the VAPs and update their ERP beacon IEs. 2660 * 2661 * Note this must be called from the deferred ERP update task paths. 2662 */ 2663 void 2664 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2665 { 2666 struct ieee80211vap *vap; 2667 2668 IEEE80211_LOCK_ASSERT(ic); 2669 2670 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2671 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2672 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2673 } 2674 2675 /* 2676 * Handle a station joining an 11g network. 2677 */ 2678 static void 2679 ieee80211_node_join_11g(struct ieee80211_node *ni) 2680 { 2681 struct ieee80211com *ic = ni->ni_ic; 2682 struct ieee80211vap *vap = ni->ni_vap; 2683 2684 IEEE80211_LOCK_ASSERT(ic); 2685 2686 /* 2687 * Station isn't capable of short slot time. Bump 2688 * the count of long slot time stations and disable 2689 * use of short slot time. Note that the actual switch 2690 * over to long slot time use may not occur until the 2691 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2692 */ 2693 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2694 vap->iv_longslotsta++; 2695 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2696 "station needs long slot time, count %d", 2697 vap->iv_longslotsta); 2698 /* 2699 * XXX TODO: this may need all VAPs checked! 2700 */ 2701 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2702 /* 2703 * Don't force slot time when switched to turbo 2704 * mode as non-ERP stations won't be present; this 2705 * need only be done when on the normal G channel. 2706 */ 2707 ieee80211_vap_set_shortslottime(vap, 0); 2708 } 2709 } 2710 /* 2711 * If the new station is not an ERP station 2712 * then bump the counter and enable protection 2713 * if configured. 2714 */ 2715 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2716 vap->iv_nonerpsta++; 2717 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2718 "station is !ERP, %d non-ERP stations associated", 2719 vap->iv_nonerpsta); 2720 /* 2721 * If station does not support short preamble 2722 * then we must enable use of Barker preamble. 2723 */ 2724 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2725 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2726 "%s", "station needs long preamble"); 2727 vap->iv_flags |= IEEE80211_F_USEBARKER; 2728 vap->iv_flags &= ~IEEE80211_F_SHPREAMBLE; 2729 ieee80211_vap_update_preamble(vap); 2730 } 2731 /* 2732 * If protection is configured and this is the first 2733 * indication we should use protection, enable it. 2734 */ 2735 if (vap->iv_protmode != IEEE80211_PROT_NONE && 2736 vap->iv_nonerpsta == 1 && 2737 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2738 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2739 "%s: enable use of protection\n", __func__); 2740 vap->iv_flags |= IEEE80211_F_USEPROT; 2741 ieee80211_vap_update_erp_protmode(vap); 2742 } 2743 } else 2744 ni->ni_flags |= IEEE80211_NODE_ERP; 2745 } 2746 2747 void 2748 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2749 { 2750 struct ieee80211com *ic = ni->ni_ic; 2751 struct ieee80211vap *vap = ni->ni_vap; 2752 int newassoc; 2753 2754 if (ni->ni_associd == 0) { 2755 uint16_t aid; 2756 2757 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2758 /* 2759 * It would be good to search the bitmap 2760 * more efficiently, but this will do for now. 2761 */ 2762 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2763 if (!IEEE80211_AID_ISSET(vap, aid)) 2764 break; 2765 } 2766 if (aid >= vap->iv_max_aid) { 2767 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2768 ieee80211_node_leave(ni); 2769 return; 2770 } 2771 ni->ni_associd = aid | 0xc000; 2772 ni->ni_jointime = time_uptime; 2773 IEEE80211_LOCK(ic); 2774 IEEE80211_AID_SET(vap, ni->ni_associd); 2775 vap->iv_sta_assoc++; 2776 2777 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2778 ieee80211_ht_node_join(ni); 2779 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2780 ieee80211_vht_node_join(ni); 2781 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2782 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2783 ieee80211_node_join_11g(ni); 2784 IEEE80211_UNLOCK(ic); 2785 2786 newassoc = 1; 2787 } else 2788 newassoc = 0; 2789 2790 /* 2791 * XXX VHT - should log VHT channel width, etc 2792 */ 2793 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2794 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s%s", 2795 IEEE80211_NODE_AID(ni), 2796 vap->iv_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2797 vap->iv_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2798 vap->iv_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2799 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2800 /* XXX update for VHT string */ 2801 ni->ni_flags & IEEE80211_NODE_HT ? 2802 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2803 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2804 ni->ni_flags & IEEE80211_NODE_AMSDU ? " (+AMSDU)" : "", 2805 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2806 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2807 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2808 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2809 ", fast-frames" : "", 2810 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2811 ", turbo" : "" 2812 ); 2813 2814 ieee80211_node_setuptxparms(ni); 2815 ieee80211_ratectl_node_init(ni); 2816 /* give driver a chance to setup state like ni_txrate */ 2817 if (ic->ic_newassoc != NULL) 2818 ic->ic_newassoc(ni, newassoc); 2819 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2820 /* tell the authenticator about new station */ 2821 if (vap->iv_auth->ia_node_join != NULL) 2822 vap->iv_auth->ia_node_join(ni); 2823 ieee80211_notify_node_join(ni, 2824 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2825 } 2826 2827 static void 2828 disable_protection(struct ieee80211vap *vap) 2829 { 2830 struct ieee80211com *ic = vap->iv_ic; 2831 2832 KASSERT(vap->iv_nonerpsta == 0 && 2833 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2834 ("%d non ERP stations, flags 0x%x", vap->iv_nonerpsta, 2835 vap->iv_flags_ext)); 2836 2837 vap->iv_flags &= ~IEEE80211_F_USEPROT; 2838 /* XXX verify mode? */ 2839 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2840 vap->iv_flags |= IEEE80211_F_SHPREAMBLE; 2841 vap->iv_flags &= ~IEEE80211_F_USEBARKER; 2842 } 2843 ieee80211_vap_update_erp_protmode(vap); 2844 ieee80211_vap_update_preamble(vap); 2845 } 2846 2847 /* 2848 * Handle a station leaving an 11g network. 2849 */ 2850 static void 2851 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2852 { 2853 struct ieee80211com *ic = ni->ni_ic; 2854 struct ieee80211vap *vap = ni->ni_vap; 2855 2856 IEEE80211_LOCK_ASSERT(ic); 2857 2858 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2859 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2860 ic->ic_bsschan->ic_flags)); 2861 2862 /* 2863 * If a long slot station do the slot time bookkeeping. 2864 */ 2865 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2866 KASSERT(vap->iv_longslotsta > 0, 2867 ("bogus long slot station count %d", vap->iv_longslotsta)); 2868 vap->iv_longslotsta--; 2869 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2870 "long slot time station leaves, count now %d", 2871 vap->iv_longslotsta); 2872 /* 2873 * XXX TODO: this may need all VAPs checked! 2874 */ 2875 if (vap->iv_longslotsta == 0) { 2876 /* 2877 * Re-enable use of short slot time if supported 2878 * and not operating in IBSS mode (per spec). 2879 */ 2880 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2881 ic->ic_opmode != IEEE80211_M_IBSS) { 2882 IEEE80211_DPRINTF(ni->ni_vap, 2883 IEEE80211_MSG_ASSOC, 2884 "%s: re-enable use of short slot time\n", 2885 __func__); 2886 ieee80211_vap_set_shortslottime(vap, 1); 2887 } 2888 } 2889 } 2890 /* 2891 * If a non-ERP station do the protection-related bookkeeping. 2892 */ 2893 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2894 KASSERT(vap->iv_nonerpsta > 0, 2895 ("bogus non-ERP station count %d", vap->iv_nonerpsta)); 2896 vap->iv_nonerpsta--; 2897 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2898 "non-ERP station leaves, count now %d%s", vap->iv_nonerpsta, 2899 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2900 " (non-ERP sta present)" : ""); 2901 if (vap->iv_nonerpsta == 0 && 2902 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2903 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2904 "%s: disable use of protection\n", __func__); 2905 disable_protection(vap); 2906 } 2907 } 2908 } 2909 2910 /* 2911 * Time out presence of an overlapping bss with non-ERP 2912 * stations. When operating in hostap mode we listen for 2913 * beacons from other stations and if we identify a non-ERP 2914 * station is present we enable protection. To identify 2915 * when all non-ERP stations are gone we time out this 2916 * condition. 2917 */ 2918 static void 2919 ieee80211_vap_erp_timeout(struct ieee80211vap *vap) 2920 { 2921 2922 IEEE80211_LOCK_ASSERT(vap->iv_ic); 2923 2924 if ((vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2925 ieee80211_time_after(ticks, vap->iv_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2926 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 2927 "%s", "age out non-ERP sta present on channel"); 2928 vap->iv_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2929 if (vap->iv_nonerpsta == 0) 2930 disable_protection(vap); 2931 } 2932 } 2933 2934 /* 2935 * Handle bookkeeping for station deauthentication/disassociation 2936 * when operating as an ap. 2937 */ 2938 void 2939 ieee80211_node_leave(struct ieee80211_node *ni) 2940 { 2941 struct ieee80211com *ic = ni->ni_ic; 2942 struct ieee80211vap *vap = ni->ni_vap; 2943 struct ieee80211_node_table *nt = ni->ni_table; 2944 2945 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2946 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2947 2948 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2949 ("unexpected operating mode %u", vap->iv_opmode)); 2950 /* 2951 * If node wasn't previously associated all 2952 * we need to do is reclaim the reference. 2953 */ 2954 /* XXX ibss mode bypasses 11g and notification */ 2955 if (ni->ni_associd == 0) 2956 goto done; 2957 /* 2958 * Tell the authenticator the station is leaving. 2959 * Note that we must do this before yanking the 2960 * association id as the authenticator uses the 2961 * associd to locate it's state block. 2962 */ 2963 if (vap->iv_auth->ia_node_leave != NULL) 2964 vap->iv_auth->ia_node_leave(ni); 2965 2966 IEEE80211_LOCK(ic); 2967 IEEE80211_AID_CLR(vap, ni->ni_associd); 2968 vap->iv_sta_assoc--; 2969 2970 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2971 ieee80211_vht_node_leave(ni); 2972 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2973 ieee80211_ht_node_leave(ni); 2974 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2975 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2976 ieee80211_node_leave_11g(ni); 2977 IEEE80211_UNLOCK(ic); 2978 /* 2979 * Cleanup station state. In particular clear various 2980 * state that might otherwise be reused if the node 2981 * is reused before the reference count goes to zero 2982 * (and memory is reclaimed). 2983 */ 2984 ieee80211_sta_leave(ni); 2985 done: 2986 /* 2987 * Remove the node from any table it's recorded in and 2988 * drop the caller's reference. Removal from the table 2989 * is important to insure the node is not reprocessed 2990 * for inactivity. 2991 */ 2992 if (nt != NULL) { 2993 IEEE80211_NODE_LOCK(nt); 2994 node_reclaim(nt, ni); 2995 IEEE80211_NODE_UNLOCK(nt); 2996 } else 2997 ieee80211_free_node(ni); 2998 } 2999 3000 struct rssiinfo { 3001 int rssi_samples; 3002 uint32_t rssi_total; 3003 }; 3004 3005 static void 3006 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 3007 { 3008 struct rssiinfo *info = arg; 3009 struct ieee80211vap *vap = ni->ni_vap; 3010 int8_t rssi; 3011 3012 /* only associated stations */ 3013 if (ni->ni_associd == 0) 3014 return; 3015 rssi = vap->iv_ic->ic_node_getrssi(ni); 3016 if (rssi != 0) { 3017 info->rssi_samples++; 3018 info->rssi_total += rssi; 3019 } 3020 } 3021 3022 static void 3023 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 3024 { 3025 struct rssiinfo *info = arg; 3026 struct ieee80211vap *vap = ni->ni_vap; 3027 int8_t rssi; 3028 3029 /* only neighbors */ 3030 /* XXX check bssid */ 3031 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 3032 return; 3033 rssi = vap->iv_ic->ic_node_getrssi(ni); 3034 if (rssi != 0) { 3035 info->rssi_samples++; 3036 info->rssi_total += rssi; 3037 } 3038 } 3039 3040 #ifdef IEEE80211_SUPPORT_MESH 3041 static void 3042 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 3043 { 3044 struct rssiinfo *info = arg; 3045 struct ieee80211vap *vap = ni->ni_vap; 3046 int8_t rssi; 3047 3048 /* only neighbors that peered successfully */ 3049 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 3050 return; 3051 rssi = vap->iv_ic->ic_node_getrssi(ni); 3052 if (rssi != 0) { 3053 info->rssi_samples++; 3054 info->rssi_total += rssi; 3055 } 3056 } 3057 #endif /* IEEE80211_SUPPORT_MESH */ 3058 3059 int8_t 3060 ieee80211_getrssi(struct ieee80211vap *vap) 3061 { 3062 #define NZ(x) ((x) == 0 ? 1 : (x)) 3063 struct ieee80211com *ic = vap->iv_ic; 3064 struct rssiinfo info; 3065 3066 info.rssi_total = 0; 3067 info.rssi_samples = 0; 3068 switch (vap->iv_opmode) { 3069 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 3070 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 3071 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi, 3072 &info); 3073 break; 3074 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 3075 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi, 3076 &info); 3077 break; 3078 #ifdef IEEE80211_SUPPORT_MESH 3079 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 3080 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi, 3081 &info); 3082 break; 3083 #endif 3084 case IEEE80211_M_MONITOR: /* XXX */ 3085 case IEEE80211_M_STA: /* use stats from associated ap */ 3086 default: 3087 if (vap->iv_bss != NULL) 3088 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 3089 info.rssi_samples = 1; 3090 break; 3091 } 3092 return info.rssi_total / NZ(info.rssi_samples); 3093 #undef NZ 3094 } 3095 3096 void 3097 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 3098 { 3099 3100 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 3101 return; 3102 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 3103 /* for non-station mode return avg'd rssi accounting */ 3104 if (vap->iv_opmode != IEEE80211_M_STA) 3105 *rssi = ieee80211_getrssi(vap); 3106 } 3107