1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2001 Atsushi Onoe 5 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_wlan.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/mbuf.h> 37 #include <sys/malloc.h> 38 #include <sys/kernel.h> 39 40 #include <sys/socket.h> 41 42 #include <net/if.h> 43 #include <net/if_var.h> 44 #include <net/if_media.h> 45 #include <net/ethernet.h> 46 47 #include <net80211/ieee80211_var.h> 48 #include <net80211/ieee80211_input.h> 49 #ifdef IEEE80211_SUPPORT_SUPERG 50 #include <net80211/ieee80211_superg.h> 51 #endif 52 #ifdef IEEE80211_SUPPORT_TDMA 53 #include <net80211/ieee80211_tdma.h> 54 #endif 55 #include <net80211/ieee80211_wds.h> 56 #include <net80211/ieee80211_mesh.h> 57 #include <net80211/ieee80211_ratectl.h> 58 #include <net80211/ieee80211_vht.h> 59 60 #include <net/bpf.h> 61 62 /* 63 * IEEE80211_NODE_HASHSIZE must be a power of 2. 64 */ 65 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 66 67 /* 68 * Association id's are managed with a bit vector. 69 */ 70 #define IEEE80211_AID_SET(_vap, b) \ 71 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 72 (1 << (IEEE80211_AID(b) % 32))) 73 #define IEEE80211_AID_CLR(_vap, b) \ 74 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 75 ~(1 << (IEEE80211_AID(b) % 32))) 76 #define IEEE80211_AID_ISSET(_vap, b) \ 77 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 78 79 static int ieee80211_sta_join1(struct ieee80211_node *); 80 81 static struct ieee80211_node *node_alloc(struct ieee80211vap *, 82 const uint8_t [IEEE80211_ADDR_LEN]); 83 static int node_init(struct ieee80211_node *); 84 static void node_cleanup(struct ieee80211_node *); 85 static void node_free(struct ieee80211_node *); 86 static void node_age(struct ieee80211_node *); 87 static int8_t node_getrssi(const struct ieee80211_node *); 88 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 89 static void node_getmimoinfo(const struct ieee80211_node *, 90 struct ieee80211_mimo_info *); 91 92 static void _ieee80211_free_node(struct ieee80211_node *); 93 94 static void node_reclaim(struct ieee80211_node_table *nt, 95 struct ieee80211_node *ni); 96 static void ieee80211_node_table_init(struct ieee80211com *ic, 97 struct ieee80211_node_table *nt, const char *name, 98 int inact, int keymaxix); 99 static void ieee80211_node_table_reset(struct ieee80211_node_table *, 100 struct ieee80211vap *); 101 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 102 static void ieee80211_vap_erp_timeout(struct ieee80211vap *); 103 104 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 105 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 106 107 void 108 ieee80211_node_attach(struct ieee80211com *ic) 109 { 110 /* XXX really want maxlen enforced per-sta */ 111 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 112 "802.11 staging q"); 113 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 114 IEEE80211_INACT_INIT, ic->ic_max_keyix); 115 callout_init(&ic->ic_inact, 1); 116 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 117 ieee80211_node_timeout, ic); 118 119 ic->ic_node_alloc = node_alloc; 120 ic->ic_node_init = node_init; 121 ic->ic_node_free = node_free; 122 ic->ic_node_cleanup = node_cleanup; 123 ic->ic_node_age = node_age; 124 ic->ic_node_drain = node_age; /* NB: same as age */ 125 ic->ic_node_getrssi = node_getrssi; 126 ic->ic_node_getsignal = node_getsignal; 127 ic->ic_node_getmimoinfo = node_getmimoinfo; 128 129 /* 130 * Set flags to be propagated to all vap's; 131 * these define default behaviour/configuration. 132 */ 133 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 134 } 135 136 void 137 ieee80211_node_detach(struct ieee80211com *ic) 138 { 139 140 callout_drain(&ic->ic_inact); 141 ieee80211_node_table_cleanup(&ic->ic_sta); 142 ieee80211_ageq_drain(&ic->ic_stageq); 143 ieee80211_ageq_cleanup(&ic->ic_stageq); 144 } 145 146 void 147 ieee80211_node_vattach(struct ieee80211vap *vap) 148 { 149 /* NB: driver can override */ 150 vap->iv_max_aid = IEEE80211_AID_DEF; 151 152 /* default station inactivity timer settings */ 153 vap->iv_inact_init = IEEE80211_INACT_INIT; 154 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 155 vap->iv_inact_run = IEEE80211_INACT_RUN; 156 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 157 158 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 159 "%s: init %u auth %u run %u probe %u\n", __func__, 160 vap->iv_inact_init, vap->iv_inact_auth, 161 vap->iv_inact_run, vap->iv_inact_probe); 162 } 163 164 void 165 ieee80211_node_latevattach(struct ieee80211vap *vap) 166 { 167 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 168 /* XXX should we allow max aid to be zero? */ 169 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 170 vap->iv_max_aid = IEEE80211_AID_MIN; 171 if_printf(vap->iv_ifp, 172 "WARNING: max aid too small, changed to %d\n", 173 vap->iv_max_aid); 174 } 175 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( 176 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 177 M_80211_NODE, 178 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 179 if (vap->iv_aid_bitmap == NULL) { 180 /* XXX no way to recover */ 181 printf("%s: no memory for AID bitmap, max aid %d!\n", 182 __func__, vap->iv_max_aid); 183 vap->iv_max_aid = 0; 184 } 185 } 186 187 ieee80211_reset_bss(vap); 188 189 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 190 } 191 192 void 193 ieee80211_node_vdetach(struct ieee80211vap *vap) 194 { 195 struct ieee80211com *ic = vap->iv_ic; 196 197 ieee80211_node_table_reset(&ic->ic_sta, vap); 198 if (vap->iv_bss != NULL) { 199 ieee80211_free_node(vap->iv_bss); 200 vap->iv_bss = NULL; 201 } 202 if (vap->iv_aid_bitmap != NULL) { 203 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); 204 vap->iv_aid_bitmap = NULL; 205 } 206 } 207 208 /* 209 * Port authorize/unauthorize interfaces for use by an authenticator. 210 */ 211 212 void 213 ieee80211_node_authorize(struct ieee80211_node *ni) 214 { 215 struct ieee80211vap *vap = ni->ni_vap; 216 217 ni->ni_flags |= IEEE80211_NODE_AUTH; 218 ni->ni_inact_reload = vap->iv_inact_run; 219 ni->ni_inact = ni->ni_inact_reload; 220 221 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 222 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 223 } 224 225 void 226 ieee80211_node_unauthorize(struct ieee80211_node *ni) 227 { 228 struct ieee80211vap *vap = ni->ni_vap; 229 230 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 231 ni->ni_inact_reload = vap->iv_inact_auth; 232 if (ni->ni_inact > ni->ni_inact_reload) 233 ni->ni_inact = ni->ni_inact_reload; 234 235 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 236 "%s: inact_reload %u inact %u", __func__, 237 ni->ni_inact_reload, ni->ni_inact); 238 } 239 240 /* 241 * Fix tx parameters for a node according to ``association state''. 242 */ 243 void 244 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 245 { 246 struct ieee80211vap *vap = ni->ni_vap; 247 enum ieee80211_phymode mode; 248 249 if (ni->ni_flags & IEEE80211_NODE_VHT) { 250 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 251 mode = IEEE80211_MODE_VHT_5GHZ; 252 else 253 mode = IEEE80211_MODE_VHT_2GHZ; 254 } else if (ni->ni_flags & IEEE80211_NODE_HT) { 255 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 256 mode = IEEE80211_MODE_11NA; 257 else 258 mode = IEEE80211_MODE_11NG; 259 } else { /* legacy rate handling */ 260 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 261 mode = IEEE80211_MODE_STURBO_A; 262 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 263 mode = IEEE80211_MODE_HALF; 264 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 265 mode = IEEE80211_MODE_QUARTER; 266 /* NB: 108A should be handled as 11a */ 267 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 268 mode = IEEE80211_MODE_11A; 269 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 270 (ni->ni_flags & IEEE80211_NODE_ERP)) 271 mode = IEEE80211_MODE_11G; 272 else 273 mode = IEEE80211_MODE_11B; 274 } 275 ni->ni_txparms = &vap->iv_txparms[mode]; 276 } 277 278 /* 279 * Set/change the channel. The rate set is also updated as 280 * to insure a consistent view by drivers. 281 * XXX should be private but hostap needs it to deal with CSA 282 */ 283 void 284 ieee80211_node_set_chan(struct ieee80211_node *ni, 285 struct ieee80211_channel *chan) 286 { 287 struct ieee80211com *ic = ni->ni_ic; 288 struct ieee80211vap *vap = ni->ni_vap; 289 enum ieee80211_phymode mode; 290 291 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 292 293 ni->ni_chan = chan; 294 mode = ieee80211_chan2mode(chan); 295 if (IEEE80211_IS_CHAN_HT(chan)) { 296 /* 297 * We must install the legacy rate est in ni_rates and the 298 * HT rate set in ni_htrates. 299 */ 300 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 301 /* 302 * Setup bss tx parameters based on operating mode. We 303 * use legacy rates when operating in a mixed HT+non-HT bss 304 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 305 */ 306 if (mode == IEEE80211_MODE_11NA && 307 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 308 mode = IEEE80211_MODE_11A; 309 else if (mode == IEEE80211_MODE_11NG && 310 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 311 mode = IEEE80211_MODE_11G; 312 if (mode == IEEE80211_MODE_11G && 313 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 314 mode = IEEE80211_MODE_11B; 315 } 316 ni->ni_txparms = &vap->iv_txparms[mode]; 317 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 318 } 319 320 static __inline void 321 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 322 { 323 /* propagate useful state */ 324 nbss->ni_authmode = obss->ni_authmode; 325 nbss->ni_txpower = obss->ni_txpower; 326 nbss->ni_vlan = obss->ni_vlan; 327 /* XXX statistics? */ 328 /* XXX legacy WDS bssid? */ 329 } 330 331 void 332 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 333 { 334 struct ieee80211com *ic = vap->iv_ic; 335 struct ieee80211_node *ni; 336 337 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 338 "%s: creating %s on channel %u%c flags 0x%08x\n", __func__, 339 ieee80211_opmode_name[vap->iv_opmode], 340 ieee80211_chan2ieee(ic, chan), 341 ieee80211_channel_type_char(chan), 342 chan->ic_flags); 343 344 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 345 if (ni == NULL) { 346 /* XXX recovery? */ 347 return; 348 } 349 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 350 ni->ni_esslen = vap->iv_des_ssid[0].len; 351 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 352 if (vap->iv_bss != NULL) 353 copy_bss(ni, vap->iv_bss); 354 ni->ni_intval = ic->ic_bintval; 355 if (vap->iv_flags & IEEE80211_F_PRIVACY) 356 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 357 if (ic->ic_phytype == IEEE80211_T_FH) { 358 ni->ni_fhdwell = 200; /* XXX */ 359 ni->ni_fhindex = 1; 360 } 361 if (vap->iv_opmode == IEEE80211_M_IBSS) { 362 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 363 if (vap->iv_flags & IEEE80211_F_DESBSSID) 364 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 365 else { 366 net80211_get_random_bytes(ni->ni_bssid, 367 IEEE80211_ADDR_LEN); 368 /* clear group bit, add local bit */ 369 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 370 } 371 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 372 if (vap->iv_flags & IEEE80211_F_DESBSSID) 373 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 374 else 375 #ifdef IEEE80211_SUPPORT_TDMA 376 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 377 #endif 378 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 379 #ifdef IEEE80211_SUPPORT_MESH 380 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 381 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 382 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 383 #endif 384 } 385 /* 386 * Fix the channel and related attributes. 387 */ 388 /* clear DFS CAC state on previous channel */ 389 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 390 ic->ic_bsschan->ic_freq != chan->ic_freq && 391 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 392 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 393 ic->ic_bsschan = chan; 394 ieee80211_node_set_chan(ni, chan); 395 ic->ic_curmode = ieee80211_chan2mode(chan); 396 /* 397 * Do mode-specific setup. 398 */ 399 if (IEEE80211_IS_CHAN_FULL(chan)) { 400 if (IEEE80211_IS_CHAN_ANYG(chan)) { 401 /* 402 * Use a mixed 11b/11g basic rate set. 403 */ 404 ieee80211_setbasicrates(&ni->ni_rates, 405 IEEE80211_MODE_11G); 406 if (vap->iv_flags & IEEE80211_F_PUREG) { 407 /* 408 * Also mark OFDM rates basic so 11b 409 * stations do not join (WiFi compliance). 410 */ 411 ieee80211_addbasicrates(&ni->ni_rates, 412 IEEE80211_MODE_11A); 413 } 414 } else if (IEEE80211_IS_CHAN_B(chan)) { 415 /* 416 * Force pure 11b rate set. 417 */ 418 ieee80211_setbasicrates(&ni->ni_rates, 419 IEEE80211_MODE_11B); 420 } 421 } 422 423 /* XXX TODO: other bits and pieces - eg fast-frames? */ 424 425 /* If we're an 11n channel then initialise the 11n bits */ 426 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { 427 /* XXX what else? */ 428 ieee80211_ht_node_init(ni); 429 ieee80211_vht_node_init(ni); 430 } else if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 431 /* XXX what else? */ 432 ieee80211_ht_node_init(ni); 433 } 434 435 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 436 } 437 438 /* 439 * Reset bss state on transition to the INIT state. 440 * Clear any stations from the table (they have been 441 * deauth'd) and reset the bss node (clears key, rate 442 * etc. state). 443 */ 444 void 445 ieee80211_reset_bss(struct ieee80211vap *vap) 446 { 447 struct ieee80211com *ic = vap->iv_ic; 448 struct ieee80211_node *ni, *obss; 449 450 ieee80211_node_table_reset(&ic->ic_sta, vap); 451 /* XXX multi-bss: wrong */ 452 ieee80211_vap_reset_erp(vap); 453 454 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 455 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 456 obss = vap->iv_bss; 457 vap->iv_bss = ieee80211_ref_node(ni); 458 if (obss != NULL) { 459 copy_bss(ni, obss); 460 ni->ni_intval = ic->ic_bintval; 461 ieee80211_free_node(obss); 462 } else 463 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 464 } 465 466 static int 467 match_ssid(const struct ieee80211_node *ni, 468 int nssid, const struct ieee80211_scan_ssid ssids[]) 469 { 470 int i; 471 472 for (i = 0; i < nssid; i++) { 473 if (ni->ni_esslen == ssids[i].len && 474 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 475 return 1; 476 } 477 return 0; 478 } 479 480 /* 481 * Test a node for suitability/compatibility. 482 */ 483 static int 484 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 485 { 486 struct ieee80211com *ic = ni->ni_ic; 487 uint8_t rate; 488 489 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 490 return 0; 491 if (vap->iv_opmode == IEEE80211_M_IBSS) { 492 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 493 return 0; 494 } else { 495 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 496 return 0; 497 } 498 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 499 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 500 return 0; 501 } else { 502 /* XXX does this mean privacy is supported or required? */ 503 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 504 return 0; 505 } 506 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 507 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 508 if (rate & IEEE80211_RATE_BASIC) 509 return 0; 510 if (vap->iv_des_nssid != 0 && 511 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 512 return 0; 513 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 514 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 515 return 0; 516 return 1; 517 } 518 519 #ifdef IEEE80211_DEBUG 520 /* 521 * Display node suitability/compatibility. 522 */ 523 static void 524 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 525 { 526 struct ieee80211com *ic = ni->ni_ic; 527 uint8_t rate; 528 int fail; 529 530 fail = 0; 531 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 532 fail |= 0x01; 533 if (vap->iv_opmode == IEEE80211_M_IBSS) { 534 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 535 fail |= 0x02; 536 } else { 537 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 538 fail |= 0x02; 539 } 540 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 541 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 542 fail |= 0x04; 543 } else { 544 /* XXX does this mean privacy is supported or required? */ 545 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 546 fail |= 0x04; 547 } 548 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 549 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 550 if (rate & IEEE80211_RATE_BASIC) 551 fail |= 0x08; 552 if (vap->iv_des_nssid != 0 && 553 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 554 fail |= 0x10; 555 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 556 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 557 fail |= 0x20; 558 559 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 560 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 561 printf(" %3d%c", 562 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 563 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 564 fail & 0x08 ? '!' : ' '); 565 printf(" %4s%c", 566 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 567 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 568 "????", 569 fail & 0x02 ? '!' : ' '); 570 printf(" %3s%c ", 571 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 572 fail & 0x04 ? '!' : ' '); 573 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 574 printf("%s\n", fail & 0x10 ? "!" : ""); 575 } 576 #endif /* IEEE80211_DEBUG */ 577 578 int 579 ieee80211_ibss_merge_check(struct ieee80211_node *ni) 580 { 581 struct ieee80211vap *vap = ni->ni_vap; 582 583 if (ni == vap->iv_bss || 584 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 585 /* unchanged, nothing to do */ 586 return 0; 587 } 588 589 if (!check_bss(vap, ni)) { 590 /* capabilities mismatch */ 591 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 592 "%s: merge failed, capabilities mismatch\n", __func__); 593 #ifdef IEEE80211_DEBUG 594 if (ieee80211_msg_assoc(vap)) 595 check_bss_debug(vap, ni); 596 #endif 597 vap->iv_stats.is_ibss_capmismatch++; 598 return 0; 599 } 600 601 return 1; 602 } 603 604 /* 605 * Check if the given node should populate the node table. 606 * 607 * We need to be in "see all beacons for all ssids" mode in order 608 * to do IBSS merges, however this means we will populate nodes for 609 * /all/ IBSS SSIDs, versus just the one we care about. 610 * 611 * So this check ensures the node can actually belong to our IBSS 612 * configuration. For now it simply checks the SSID. 613 */ 614 int 615 ieee80211_ibss_node_check_new(struct ieee80211_node *ni, 616 const struct ieee80211_scanparams *scan) 617 { 618 struct ieee80211vap *vap = ni->ni_vap; 619 int i; 620 621 /* 622 * If we have no SSID and no scan SSID, return OK. 623 */ 624 if (vap->iv_des_nssid == 0 && scan->ssid == NULL) 625 goto ok; 626 627 /* 628 * If we have one of (SSID, scan SSID) then return error. 629 */ 630 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL)) 631 goto mismatch; 632 633 /* 634 * Double-check - we need scan SSID. 635 */ 636 if (scan->ssid == NULL) 637 goto mismatch; 638 639 /* 640 * Check if the scan SSID matches the SSID list for the VAP. 641 */ 642 for (i = 0; i < vap->iv_des_nssid; i++) { 643 /* Sanity length check */ 644 if (vap->iv_des_ssid[i].len != scan->ssid[1]) 645 continue; 646 647 /* Note: SSID in the scan entry is the IE format */ 648 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2, 649 vap->iv_des_ssid[i].len) == 0) 650 goto ok; 651 } 652 653 mismatch: 654 return (0); 655 ok: 656 return (1); 657 } 658 659 /* 660 * Handle 802.11 ad hoc network merge. The 661 * convention, set by the Wireless Ethernet Compatibility Alliance 662 * (WECA), is that an 802.11 station will change its BSSID to match 663 * the "oldest" 802.11 ad hoc network, on the same channel, that 664 * has the station's desired SSID. The "oldest" 802.11 network 665 * sends beacons with the greatest TSF timestamp. 666 * 667 * The caller is assumed to validate TSF's before attempting a merge. 668 * 669 * Return !0 if the BSSID changed, 0 otherwise. 670 */ 671 int 672 ieee80211_ibss_merge(struct ieee80211_node *ni) 673 { 674 #ifdef IEEE80211_DEBUG 675 struct ieee80211vap *vap = ni->ni_vap; 676 #endif 677 678 if (! ieee80211_ibss_merge_check(ni)) 679 return 0; 680 681 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 682 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 683 ether_sprintf(ni->ni_bssid), 684 vap->iv_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 685 vap->iv_flags&IEEE80211_F_SHSLOT ? "short" : "long", 686 vap->iv_flags&IEEE80211_F_USEPROT ? ", protection" : "" 687 ); 688 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 689 } 690 691 /* 692 * Calculate HT channel promotion flags for all vaps. 693 * This assumes ni_chan have been setup for each vap. 694 */ 695 static int 696 gethtadjustflags(struct ieee80211com *ic) 697 { 698 struct ieee80211vap *vap; 699 int flags; 700 701 flags = 0; 702 /* XXX locking */ 703 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 704 if (vap->iv_state < IEEE80211_S_RUN) 705 continue; 706 switch (vap->iv_opmode) { 707 case IEEE80211_M_WDS: 708 case IEEE80211_M_STA: 709 case IEEE80211_M_AHDEMO: 710 case IEEE80211_M_HOSTAP: 711 case IEEE80211_M_IBSS: 712 case IEEE80211_M_MBSS: 713 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 714 break; 715 default: 716 break; 717 } 718 } 719 return flags; 720 } 721 722 /* 723 * Calculate VHT channel promotion flags for all vaps. 724 * This assumes ni_chan have been setup for each vap. 725 */ 726 static int 727 getvhtadjustflags(struct ieee80211com *ic) 728 { 729 struct ieee80211vap *vap; 730 int flags; 731 732 flags = 0; 733 /* XXX locking */ 734 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 735 if (vap->iv_state < IEEE80211_S_RUN) 736 continue; 737 switch (vap->iv_opmode) { 738 case IEEE80211_M_WDS: 739 case IEEE80211_M_STA: 740 case IEEE80211_M_AHDEMO: 741 case IEEE80211_M_HOSTAP: 742 case IEEE80211_M_IBSS: 743 case IEEE80211_M_MBSS: 744 flags |= ieee80211_vhtchanflags(vap->iv_bss->ni_chan); 745 break; 746 default: 747 break; 748 } 749 } 750 return flags; 751 } 752 753 /* 754 * Check if the current channel needs to change based on whether 755 * any vap's are using HT20/HT40. This is used to sync the state 756 * of ic_curchan after a channel width change on a running vap. 757 * 758 * Same applies for VHT. 759 */ 760 void 761 ieee80211_sync_curchan(struct ieee80211com *ic) 762 { 763 struct ieee80211_channel *c; 764 765 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 766 c = ieee80211_vht_adjust_channel(ic, c, getvhtadjustflags(ic)); 767 768 if (c != ic->ic_curchan) { 769 ic->ic_curchan = c; 770 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 771 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 772 IEEE80211_UNLOCK(ic); 773 ic->ic_set_channel(ic); 774 ieee80211_radiotap_chan_change(ic); 775 IEEE80211_LOCK(ic); 776 } 777 } 778 779 /* 780 * Setup the current channel. The request channel may be 781 * promoted if other vap's are operating with HT20/HT40. 782 */ 783 void 784 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 785 { 786 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 787 int flags = gethtadjustflags(ic); 788 /* 789 * Check for channel promotion required to support the 790 * set of running vap's. This assumes we are called 791 * after ni_chan is setup for each vap. 792 */ 793 /* XXX VHT? */ 794 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 795 if (flags > ieee80211_htchanflags(c)) 796 c = ieee80211_ht_adjust_channel(ic, c, flags); 797 } 798 799 /* 800 * VHT promotion - this will at least promote to VHT20/40 801 * based on what HT has done; it may further promote the 802 * channel to VHT80 or above. 803 */ 804 if (ic->ic_vhtcaps != 0) { 805 int flags = getvhtadjustflags(ic); 806 if (flags > ieee80211_vhtchanflags(c)) 807 c = ieee80211_vht_adjust_channel(ic, c, flags); 808 } 809 810 ic->ic_bsschan = ic->ic_curchan = c; 811 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 812 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 813 } 814 815 /* 816 * Change the current channel. The channel change is guaranteed to have 817 * happened before the next state change. 818 */ 819 void 820 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 821 { 822 ieee80211_setupcurchan(ic, c); 823 ieee80211_runtask(ic, &ic->ic_chan_task); 824 } 825 826 void 827 ieee80211_update_chw(struct ieee80211com *ic) 828 { 829 830 ieee80211_setupcurchan(ic, ic->ic_curchan); 831 ieee80211_runtask(ic, &ic->ic_chw_task); 832 } 833 834 /* 835 * Join the specified IBSS/BSS network. The node is assumed to 836 * be passed in with a held reference. 837 */ 838 static int 839 ieee80211_sta_join1(struct ieee80211_node *selbs) 840 { 841 struct ieee80211vap *vap = selbs->ni_vap; 842 struct ieee80211com *ic = selbs->ni_ic; 843 struct ieee80211_node *obss; 844 int canreassoc; 845 846 /* 847 * Committed to selbs, setup state. 848 */ 849 obss = vap->iv_bss; 850 /* 851 * Check if old+new node have the same address in which 852 * case we can reassociate when operating in sta mode. 853 */ 854 canreassoc = (obss != NULL && 855 vap->iv_state == IEEE80211_S_RUN && 856 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 857 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 858 if (obss != NULL) { 859 struct ieee80211_node_table *nt = obss->ni_table; 860 861 copy_bss(selbs, obss); 862 ieee80211_node_decref(obss); /* iv_bss reference */ 863 864 IEEE80211_NODE_LOCK(nt); 865 node_reclaim(nt, obss); /* station table reference */ 866 IEEE80211_NODE_UNLOCK(nt); 867 868 obss = NULL; /* NB: guard against later use */ 869 } 870 871 /* 872 * Delete unusable rates; we've already checked 873 * that the negotiated rate set is acceptable. 874 */ 875 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 876 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 877 878 ieee80211_setcurchan(ic, selbs->ni_chan); 879 /* 880 * Set the erp state (mostly the slot time) to deal with 881 * the auto-select case; this should be redundant if the 882 * mode is locked. 883 */ 884 ieee80211_vap_reset_erp(vap); 885 ieee80211_wme_initparams(vap); 886 887 if (vap->iv_opmode == IEEE80211_M_STA) { 888 if (canreassoc) { 889 /* Reassociate */ 890 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 891 } else { 892 /* 893 * Act as if we received a DEAUTH frame in case we 894 * are invoked from the RUN state. This will cause 895 * us to try to re-authenticate if we are operating 896 * as a station. 897 */ 898 IEEE80211_DPRINTF(vap, IEEE80211_MSG_AUTH, 899 "%s %p<%s> -> AUTH, FC0_SUBTYPE_DEAUTH\n", 900 __func__, selbs, ether_sprintf(selbs->ni_macaddr)); 901 ieee80211_new_state(vap, IEEE80211_S_AUTH, 902 IEEE80211_FC0_SUBTYPE_DEAUTH); 903 } 904 } else 905 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 906 return 1; 907 } 908 909 int 910 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 911 const struct ieee80211_scan_entry *se) 912 { 913 struct ieee80211com *ic = vap->iv_ic; 914 struct ieee80211_node *ni; 915 int do_ht = 0; 916 917 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 918 if (ni == NULL) { 919 /* XXX msg */ 920 return 0; 921 } 922 923 /* 924 * Expand scan state into node's format. 925 * XXX may not need all this stuff 926 */ 927 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 928 ni->ni_esslen = se->se_ssid[1]; 929 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 930 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 931 ni->ni_intval = se->se_intval; 932 ni->ni_capinfo = se->se_capinfo; 933 ni->ni_chan = chan; 934 ni->ni_timoff = se->se_timoff; 935 ni->ni_fhdwell = se->se_fhdwell; 936 ni->ni_fhindex = se->se_fhindex; 937 ni->ni_erp = se->se_erp; 938 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 939 ni->ni_noise = se->se_noise; 940 if (vap->iv_opmode == IEEE80211_M_STA) { 941 /* NB: only infrastructure mode requires an associd */ 942 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 943 } 944 945 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 946 ieee80211_ies_expand(&ni->ni_ies); 947 #ifdef IEEE80211_SUPPORT_SUPERG 948 if (ni->ni_ies.ath_ie != NULL) 949 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 950 #endif 951 if (ni->ni_ies.htcap_ie != NULL) 952 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 953 if (ni->ni_ies.htinfo_ie != NULL) 954 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 955 #ifdef IEEE80211_SUPPORT_MESH 956 if (ni->ni_ies.meshid_ie != NULL) 957 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 958 #endif 959 #ifdef IEEE80211_SUPPORT_TDMA 960 if (ni->ni_ies.tdma_ie != NULL) 961 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 962 #endif 963 if (ni->ni_ies.vhtcap_ie != NULL) 964 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 965 if (ni->ni_ies.vhtopmode_ie != NULL) 966 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 967 968 /* XXX parse BSSLOAD IE */ 969 /* XXX parse TXPWRENV IE */ 970 /* XXX parse APCHANREP IE */ 971 } 972 973 vap->iv_dtim_period = se->se_dtimperiod; 974 vap->iv_dtim_count = 0; 975 976 /* NB: must be after ni_chan is setup */ 977 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 978 IEEE80211_F_DOSORT); 979 if (ieee80211_iserp_rateset(&ni->ni_rates)) 980 ni->ni_flags |= IEEE80211_NODE_ERP; 981 982 /* 983 * Setup HT state for this node if it's available, otherwise 984 * non-STA modes won't pick this state up. 985 * 986 * For IBSS and related modes that don't go through an 987 * association request/response, the only appropriate place 988 * to setup the HT state is here. 989 */ 990 if (ni->ni_ies.htinfo_ie != NULL && 991 ni->ni_ies.htcap_ie != NULL && 992 vap->iv_flags_ht & IEEE80211_FHT_HT) { 993 ieee80211_ht_node_init(ni); 994 ieee80211_ht_updateparams(ni, 995 ni->ni_ies.htcap_ie, 996 ni->ni_ies.htinfo_ie); 997 do_ht = 1; 998 } 999 1000 /* 1001 * Setup VHT state for this node if it's available. 1002 * Same as the above. 1003 * 1004 * For now, don't allow 2GHz VHT operation. 1005 */ 1006 if (ni->ni_ies.vhtopmode_ie != NULL && 1007 ni->ni_ies.vhtcap_ie != NULL && 1008 vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1009 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1010 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1011 __func__, 1012 ni->ni_macaddr, 1013 ":"); 1014 } else { 1015 ieee80211_vht_node_init(ni); 1016 ieee80211_vht_updateparams(ni, 1017 ni->ni_ies.vhtcap_ie, 1018 ni->ni_ies.vhtopmode_ie); 1019 ieee80211_setup_vht_rates(ni, ni->ni_ies.vhtcap_ie, 1020 ni->ni_ies.vhtopmode_ie); 1021 do_ht = 1; 1022 } 1023 } 1024 1025 /* Finally do the node channel change */ 1026 if (do_ht) { 1027 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1028 ni->ni_ies.htinfo_ie); 1029 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 1030 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1031 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 1032 } 1033 1034 /* XXX else check for ath FF? */ 1035 /* XXX QoS? Difficult given that WME config is specific to a master */ 1036 1037 ieee80211_node_setuptxparms(ni); 1038 ieee80211_ratectl_node_init(ni); 1039 1040 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 1041 } 1042 1043 /* 1044 * Leave the specified IBSS/BSS network. The node is assumed to 1045 * be passed in with a held reference. 1046 */ 1047 void 1048 ieee80211_sta_leave(struct ieee80211_node *ni) 1049 { 1050 struct ieee80211com *ic = ni->ni_ic; 1051 1052 ic->ic_node_cleanup(ni); 1053 ieee80211_notify_node_leave(ni); 1054 } 1055 1056 /* 1057 * Send a deauthenticate frame and drop the station. 1058 */ 1059 void 1060 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 1061 { 1062 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 1063 ieee80211_ref_node(ni); 1064 if (ni->ni_associd != 0) 1065 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 1066 ieee80211_node_leave(ni); 1067 ieee80211_free_node(ni); 1068 } 1069 1070 static struct ieee80211_node * 1071 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1072 { 1073 struct ieee80211_node *ni; 1074 1075 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), 1076 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1077 return ni; 1078 } 1079 1080 static int 1081 node_init(struct ieee80211_node *ni) 1082 { 1083 return 0; 1084 } 1085 1086 /* 1087 * Initialize an ie blob with the specified data. If previous 1088 * data exists re-use the data block. As a side effect we clear 1089 * all references to specific ie's; the caller is required to 1090 * recalculate them. 1091 */ 1092 int 1093 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 1094 { 1095 /* NB: assumes data+len are the last fields */ 1096 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 1097 if (ies->data != NULL && ies->len != len) { 1098 /* data size changed */ 1099 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1100 ies->data = NULL; 1101 } 1102 if (ies->data == NULL) { 1103 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 1104 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1105 if (ies->data == NULL) { 1106 ies->len = 0; 1107 /* NB: pointers have already been zero'd above */ 1108 return 0; 1109 } 1110 } 1111 memcpy(ies->data, data, len); 1112 ies->len = len; 1113 return 1; 1114 } 1115 1116 /* 1117 * Reclaim storage for an ie blob. 1118 */ 1119 void 1120 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 1121 { 1122 if (ies->data != NULL) 1123 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1124 } 1125 1126 /* 1127 * Expand an ie blob data contents and to fillin individual 1128 * ie pointers. The data blob is assumed to be well-formed; 1129 * we don't do any validity checking of ie lengths. 1130 */ 1131 void 1132 ieee80211_ies_expand(struct ieee80211_ies *ies) 1133 { 1134 uint8_t *ie; 1135 int ielen; 1136 1137 ie = ies->data; 1138 ielen = ies->len; 1139 while (ielen > 1) { 1140 switch (ie[0]) { 1141 case IEEE80211_ELEMID_VENDOR: 1142 if (iswpaoui(ie)) 1143 ies->wpa_ie = ie; 1144 else if (iswmeoui(ie)) 1145 ies->wme_ie = ie; 1146 #ifdef IEEE80211_SUPPORT_SUPERG 1147 else if (isatherosoui(ie)) 1148 ies->ath_ie = ie; 1149 #endif 1150 #ifdef IEEE80211_SUPPORT_TDMA 1151 else if (istdmaoui(ie)) 1152 ies->tdma_ie = ie; 1153 #endif 1154 break; 1155 case IEEE80211_ELEMID_RSN: 1156 ies->rsn_ie = ie; 1157 break; 1158 case IEEE80211_ELEMID_HTCAP: 1159 ies->htcap_ie = ie; 1160 break; 1161 case IEEE80211_ELEMID_HTINFO: 1162 ies->htinfo_ie = ie; 1163 break; 1164 #ifdef IEEE80211_SUPPORT_MESH 1165 case IEEE80211_ELEMID_MESHID: 1166 ies->meshid_ie = ie; 1167 break; 1168 #endif 1169 case IEEE80211_ELEMID_VHT_CAP: 1170 ies->vhtcap_ie = ie; 1171 break; 1172 case IEEE80211_ELEMID_VHT_OPMODE: 1173 ies->vhtopmode_ie = ie; 1174 break; 1175 case IEEE80211_ELEMID_VHT_PWR_ENV: 1176 ies->vhtpwrenv_ie = ie; 1177 break; 1178 case IEEE80211_ELEMID_BSSLOAD: 1179 ies->bssload_ie = ie; 1180 break; 1181 case IEEE80211_ELEMID_APCHANREP: 1182 ies->apchanrep_ie = ie; 1183 break; 1184 } 1185 ielen -= 2 + ie[1]; 1186 ie += 2 + ie[1]; 1187 } 1188 } 1189 1190 /* 1191 * Reclaim any resources in a node and reset any critical 1192 * state. Typically nodes are free'd immediately after, 1193 * but in some cases the storage may be reused so we need 1194 * to insure consistent state (should probably fix that). 1195 */ 1196 static void 1197 node_cleanup(struct ieee80211_node *ni) 1198 { 1199 struct ieee80211vap *vap = ni->ni_vap; 1200 struct ieee80211com *ic = ni->ni_ic; 1201 int i; 1202 1203 /* NB: preserve ni_table */ 1204 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1205 if (vap->iv_opmode != IEEE80211_M_STA) 1206 vap->iv_ps_sta--; 1207 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1208 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1209 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1210 } 1211 /* 1212 * Cleanup any VHT and HT-related state. 1213 */ 1214 if (ni->ni_flags & IEEE80211_NODE_VHT) 1215 ieee80211_vht_node_cleanup(ni); 1216 if (ni->ni_flags & IEEE80211_NODE_HT) 1217 ieee80211_ht_node_cleanup(ni); 1218 #ifdef IEEE80211_SUPPORT_SUPERG 1219 /* Always do FF node cleanup; for A-MSDU */ 1220 ieee80211_ff_node_cleanup(ni); 1221 #endif 1222 #ifdef IEEE80211_SUPPORT_MESH 1223 /* 1224 * Cleanup any mesh-related state. 1225 */ 1226 if (vap->iv_opmode == IEEE80211_M_MBSS) 1227 ieee80211_mesh_node_cleanup(ni); 1228 #endif 1229 /* 1230 * Clear any staging queue entries. 1231 */ 1232 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1233 1234 /* 1235 * Clear AREF flag that marks the authorization refcnt bump 1236 * has happened. This is probably not needed as the node 1237 * should always be removed from the table so not found but 1238 * do it just in case. 1239 * Likewise clear the ASSOCID flag as these flags are intended 1240 * to be managed in tandem. 1241 */ 1242 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1243 1244 /* 1245 * Drain power save queue and, if needed, clear TIM. 1246 */ 1247 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1248 vap->iv_set_tim(ni, 0); 1249 1250 ni->ni_associd = 0; 1251 if (ni->ni_challenge != NULL) { 1252 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1253 ni->ni_challenge = NULL; 1254 } 1255 /* 1256 * Preserve SSID, WPA, and WME ie's so the bss node is 1257 * reusable during a re-auth/re-assoc state transition. 1258 * If we remove these data they will not be recreated 1259 * because they come from a probe-response or beacon frame 1260 * which cannot be expected prior to the association-response. 1261 * This should not be an issue when operating in other modes 1262 * as stations leaving always go through a full state transition 1263 * which will rebuild this state. 1264 * 1265 * XXX does this leave us open to inheriting old state? 1266 */ 1267 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1268 if (ni->ni_rxfrag[i] != NULL) { 1269 m_freem(ni->ni_rxfrag[i]); 1270 ni->ni_rxfrag[i] = NULL; 1271 } 1272 /* 1273 * Must be careful here to remove any key map entry w/o a LOR. 1274 */ 1275 ieee80211_node_delucastkey(ni); 1276 } 1277 1278 static void 1279 node_free(struct ieee80211_node *ni) 1280 { 1281 struct ieee80211com *ic = ni->ni_ic; 1282 1283 ieee80211_ratectl_node_deinit(ni); 1284 ic->ic_node_cleanup(ni); 1285 ieee80211_ies_cleanup(&ni->ni_ies); 1286 ieee80211_psq_cleanup(&ni->ni_psq); 1287 IEEE80211_FREE(ni, M_80211_NODE); 1288 } 1289 1290 static void 1291 node_age(struct ieee80211_node *ni) 1292 { 1293 struct ieee80211vap *vap = ni->ni_vap; 1294 1295 /* 1296 * Age frames on the power save queue. 1297 */ 1298 if (ieee80211_node_psq_age(ni) != 0 && 1299 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1300 vap->iv_set_tim(ni, 0); 1301 /* 1302 * Age out HT resources (e.g. frames on the 1303 * A-MPDU reorder queues). 1304 */ 1305 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1306 ieee80211_ht_node_age(ni); 1307 } 1308 1309 static int8_t 1310 node_getrssi(const struct ieee80211_node *ni) 1311 { 1312 uint32_t avgrssi = ni->ni_avgrssi; 1313 int32_t rssi; 1314 1315 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1316 return 0; 1317 rssi = IEEE80211_RSSI_GET(avgrssi); 1318 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1319 } 1320 1321 static void 1322 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1323 { 1324 *rssi = node_getrssi(ni); 1325 *noise = ni->ni_noise; 1326 } 1327 1328 static void 1329 node_getmimoinfo(const struct ieee80211_node *ni, 1330 struct ieee80211_mimo_info *info) 1331 { 1332 int i; 1333 uint32_t avgrssi; 1334 int32_t rssi; 1335 1336 bzero(info, sizeof(*info)); 1337 1338 for (i = 0; i < MIN(IEEE80211_MAX_CHAINS, ni->ni_mimo_chains); i++) { 1339 /* Note: for now, just pri20 channel info */ 1340 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1341 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1342 info->ch[i].rssi[0] = 0; 1343 } else { 1344 rssi = IEEE80211_RSSI_GET(avgrssi); 1345 info->ch[i].rssi[0] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1346 } 1347 info->ch[i].noise[0] = ni->ni_mimo_noise_ctl[i]; 1348 } 1349 1350 /* XXX ext radios? */ 1351 1352 /* XXX EVM? */ 1353 } 1354 1355 static void 1356 ieee80211_add_node_nt(struct ieee80211_node_table *nt, 1357 struct ieee80211_node *ni) 1358 { 1359 struct ieee80211com *ic = nt->nt_ic; 1360 int hash; 1361 1362 IEEE80211_NODE_LOCK_ASSERT(nt); 1363 1364 hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr); 1365 (void) ic; /* XXX IEEE80211_NODE_HASH */ 1366 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1367 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1368 nt->nt_count++; 1369 ni->ni_table = nt; 1370 } 1371 1372 static void 1373 ieee80211_del_node_nt(struct ieee80211_node_table *nt, 1374 struct ieee80211_node *ni) 1375 { 1376 1377 IEEE80211_NODE_LOCK_ASSERT(nt); 1378 1379 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1380 LIST_REMOVE(ni, ni_hash); 1381 nt->nt_count--; 1382 KASSERT(nt->nt_count >= 0, 1383 ("nt_count is negative (%d)!\n", nt->nt_count)); 1384 ni->ni_table = NULL; 1385 } 1386 1387 struct ieee80211_node * 1388 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1389 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1390 { 1391 struct ieee80211com *ic = nt->nt_ic; 1392 struct ieee80211_node *ni; 1393 1394 ni = ic->ic_node_alloc(vap, macaddr); 1395 if (ni == NULL) { 1396 vap->iv_stats.is_rx_nodealloc++; 1397 return NULL; 1398 } 1399 1400 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1401 "%s %p<%s> in %s table\n", __func__, ni, 1402 ether_sprintf(macaddr), nt->nt_name); 1403 1404 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1405 ieee80211_node_initref(ni); /* mark referenced */ 1406 ni->ni_chan = IEEE80211_CHAN_ANYC; 1407 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1408 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1409 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1410 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1411 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1412 ni->ni_inact_reload = nt->nt_inact_init; 1413 ni->ni_inact = ni->ni_inact_reload; 1414 ni->ni_ath_defkeyix = 0x7fff; 1415 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1416 #ifdef IEEE80211_SUPPORT_MESH 1417 if (vap->iv_opmode == IEEE80211_M_MBSS) 1418 ieee80211_mesh_node_init(vap, ni); 1419 #endif 1420 IEEE80211_NODE_LOCK(nt); 1421 ieee80211_add_node_nt(nt, ni); 1422 ni->ni_vap = vap; 1423 ni->ni_ic = ic; 1424 IEEE80211_NODE_UNLOCK(nt); 1425 1426 /* handle failure; free node state */ 1427 if (ic->ic_node_init(ni) != 0) { 1428 vap->iv_stats.is_rx_nodealloc++; 1429 ieee80211_psq_cleanup(&ni->ni_psq); 1430 ieee80211_ratectl_node_deinit(ni); 1431 _ieee80211_free_node(ni); 1432 return NULL; 1433 } 1434 1435 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1436 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1437 1438 return ni; 1439 } 1440 1441 /* 1442 * Craft a temporary node suitable for sending a management frame 1443 * to the specified station. We craft only as much state as we 1444 * need to do the work since the node will be immediately reclaimed 1445 * once the send completes. 1446 */ 1447 struct ieee80211_node * 1448 ieee80211_tmp_node(struct ieee80211vap *vap, 1449 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1450 { 1451 struct ieee80211com *ic = vap->iv_ic; 1452 struct ieee80211_node *ni; 1453 1454 ni = ic->ic_node_alloc(vap, macaddr); 1455 if (ni != NULL) { 1456 struct ieee80211_node *bss = vap->iv_bss; 1457 1458 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1459 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1460 1461 ni->ni_table = NULL; /* NB: pedantic */ 1462 ni->ni_ic = ic; /* NB: needed to set channel */ 1463 ni->ni_vap = vap; 1464 1465 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1466 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1467 ieee80211_node_initref(ni); /* mark referenced */ 1468 /* NB: required by ieee80211_fix_rate */ 1469 ieee80211_node_set_chan(ni, bss->ni_chan); 1470 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1471 IEEE80211_KEYIX_NONE); 1472 ni->ni_txpower = bss->ni_txpower; 1473 /* XXX optimize away */ 1474 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1475 1476 ieee80211_ratectl_node_init(ni); 1477 1478 /* handle failure; free node state */ 1479 if (ic->ic_node_init(ni) != 0) { 1480 vap->iv_stats.is_rx_nodealloc++; 1481 ieee80211_psq_cleanup(&ni->ni_psq); 1482 ieee80211_ratectl_node_deinit(ni); 1483 _ieee80211_free_node(ni); 1484 return NULL; 1485 } 1486 1487 } else { 1488 /* XXX msg */ 1489 vap->iv_stats.is_rx_nodealloc++; 1490 } 1491 return ni; 1492 } 1493 1494 struct ieee80211_node * 1495 ieee80211_dup_bss(struct ieee80211vap *vap, 1496 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1497 { 1498 struct ieee80211com *ic = vap->iv_ic; 1499 struct ieee80211_node *ni; 1500 1501 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1502 if (ni != NULL) { 1503 struct ieee80211_node *bss = vap->iv_bss; 1504 /* 1505 * Inherit from iv_bss. 1506 */ 1507 copy_bss(ni, bss); 1508 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1509 ieee80211_node_set_chan(ni, bss->ni_chan); 1510 } 1511 return ni; 1512 } 1513 1514 /* 1515 * Create a bss node for a legacy WDS vap. The far end does 1516 * not associate so we just create create a new node and 1517 * simulate an association. The caller is responsible for 1518 * installing the node as the bss node and handling any further 1519 * setup work like authorizing the port. 1520 */ 1521 struct ieee80211_node * 1522 ieee80211_node_create_wds(struct ieee80211vap *vap, 1523 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1524 { 1525 struct ieee80211com *ic = vap->iv_ic; 1526 struct ieee80211_node *ni; 1527 1528 /* XXX check if node already in sta table? */ 1529 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1530 if (ni != NULL) { 1531 ni->ni_wdsvap = vap; 1532 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1533 /* 1534 * Inherit any manually configured settings. 1535 */ 1536 copy_bss(ni, vap->iv_bss); 1537 ieee80211_node_set_chan(ni, chan); 1538 /* NB: propagate ssid so available to WPA supplicant */ 1539 ni->ni_esslen = vap->iv_des_ssid[0].len; 1540 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1541 /* NB: no associd for peer */ 1542 /* 1543 * There are no management frames to use to 1544 * discover neighbor capabilities, so blindly 1545 * propagate the local configuration. 1546 */ 1547 if (vap->iv_flags & IEEE80211_F_WME) 1548 ni->ni_flags |= IEEE80211_NODE_QOS; 1549 #ifdef IEEE80211_SUPPORT_SUPERG 1550 if (vap->iv_flags & IEEE80211_F_FF) 1551 ni->ni_flags |= IEEE80211_NODE_FF; 1552 #endif 1553 /* XXX VHT */ 1554 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1555 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1556 /* 1557 * Device is HT-capable and HT is enabled for 1558 * the vap; setup HT operation. On return 1559 * ni_chan will be adjusted to an HT channel. 1560 */ 1561 ieee80211_ht_wds_init(ni); 1562 if (vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1563 printf("%s: TODO: vht_wds_init\n", __func__); 1564 } 1565 } else { 1566 struct ieee80211_channel *c = ni->ni_chan; 1567 /* 1568 * Force a legacy channel to be used. 1569 */ 1570 c = ieee80211_find_channel(ic, 1571 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1572 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1573 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1574 ni->ni_chan = c; 1575 } 1576 } 1577 return ni; 1578 } 1579 1580 struct ieee80211_node * 1581 #ifdef IEEE80211_DEBUG_REFCNT 1582 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1583 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1584 #else 1585 ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1586 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1587 #endif 1588 { 1589 struct ieee80211_node *ni; 1590 int hash; 1591 1592 IEEE80211_NODE_LOCK_ASSERT(nt); 1593 1594 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1595 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1596 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1597 ieee80211_ref_node(ni); /* mark referenced */ 1598 #ifdef IEEE80211_DEBUG_REFCNT 1599 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1600 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1601 func, line, 1602 ni, ether_sprintf(ni->ni_macaddr), 1603 ieee80211_node_refcnt(ni)); 1604 #endif 1605 return ni; 1606 } 1607 } 1608 return NULL; 1609 } 1610 1611 struct ieee80211_node * 1612 #ifdef IEEE80211_DEBUG_REFCNT 1613 ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1614 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1615 #else 1616 ieee80211_find_node(struct ieee80211_node_table *nt, 1617 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1618 #endif 1619 { 1620 struct ieee80211_node *ni; 1621 1622 IEEE80211_NODE_LOCK(nt); 1623 ni = ieee80211_find_node_locked(nt, macaddr); 1624 IEEE80211_NODE_UNLOCK(nt); 1625 return ni; 1626 } 1627 1628 struct ieee80211_node * 1629 #ifdef IEEE80211_DEBUG_REFCNT 1630 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1631 const struct ieee80211vap *vap, 1632 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1633 #else 1634 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1635 const struct ieee80211vap *vap, 1636 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1637 #endif 1638 { 1639 struct ieee80211_node *ni; 1640 int hash; 1641 1642 IEEE80211_NODE_LOCK_ASSERT(nt); 1643 1644 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1645 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1646 if (ni->ni_vap == vap && 1647 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1648 ieee80211_ref_node(ni); /* mark referenced */ 1649 #ifdef IEEE80211_DEBUG_REFCNT 1650 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1651 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1652 func, line, 1653 ni, ether_sprintf(ni->ni_macaddr), 1654 ieee80211_node_refcnt(ni)); 1655 #endif 1656 return ni; 1657 } 1658 } 1659 return NULL; 1660 } 1661 1662 struct ieee80211_node * 1663 #ifdef IEEE80211_DEBUG_REFCNT 1664 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1665 const struct ieee80211vap *vap, 1666 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1667 #else 1668 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1669 const struct ieee80211vap *vap, 1670 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1671 #endif 1672 { 1673 struct ieee80211_node *ni; 1674 1675 IEEE80211_NODE_LOCK(nt); 1676 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1677 IEEE80211_NODE_UNLOCK(nt); 1678 return ni; 1679 } 1680 1681 /* 1682 * Fake up a node; this handles node discovery in adhoc mode. 1683 * Note that for the driver's benefit we we treat this like 1684 * an association so the driver has an opportunity to setup 1685 * it's private state. 1686 */ 1687 struct ieee80211_node * 1688 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1689 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1690 { 1691 struct ieee80211_node *ni; 1692 1693 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1694 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1695 ni = ieee80211_dup_bss(vap, macaddr); 1696 if (ni != NULL) { 1697 struct ieee80211com *ic = vap->iv_ic; 1698 1699 /* XXX no rate negotiation; just dup */ 1700 ni->ni_rates = vap->iv_bss->ni_rates; 1701 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1702 ni->ni_flags |= IEEE80211_NODE_ERP; 1703 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1704 /* 1705 * In adhoc demo mode there are no management 1706 * frames to use to discover neighbor capabilities, 1707 * so blindly propagate the local configuration 1708 * so we can do interesting things (e.g. use 1709 * WME to disable ACK's). 1710 */ 1711 /* 1712 * XXX TODO: 11n? 1713 */ 1714 if (vap->iv_flags & IEEE80211_F_WME) 1715 ni->ni_flags |= IEEE80211_NODE_QOS; 1716 #ifdef IEEE80211_SUPPORT_SUPERG 1717 if (vap->iv_flags & IEEE80211_F_FF) 1718 ni->ni_flags |= IEEE80211_NODE_FF; 1719 #endif 1720 } 1721 ieee80211_node_setuptxparms(ni); 1722 ieee80211_ratectl_node_init(ni); 1723 1724 /* 1725 * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX, 1726 * not A-MPDU TX; not 11n rates, etc. We'll cycle 1727 * that after we hear that we can indeed do 11n 1728 * (either by a beacon frame or by a probe response.) 1729 */ 1730 1731 /* 1732 * This is the first time we see the node. 1733 */ 1734 if (ic->ic_newassoc != NULL) 1735 ic->ic_newassoc(ni, 1); 1736 1737 /* 1738 * Kick off a probe request to the given node; 1739 * we will then use the probe response to update 1740 * 11n/etc configuration state. 1741 * 1742 * XXX TODO: this isn't guaranteed, and until we get 1743 * a probe response, we won't be able to actually 1744 * do anything 802.11n related to the node. 1745 * So if this does indeed work, maybe we should hold 1746 * off on sending responses until we get the probe 1747 * response, or just default to some sensible subset 1748 * of 802.11n behaviour (eg always allow aggregation 1749 * negotiation TO us, but not FROM us, etc) so we 1750 * aren't entirely busted. 1751 */ 1752 if (vap->iv_opmode == IEEE80211_M_IBSS) { 1753 ieee80211_send_probereq(ni, /* node */ 1754 vap->iv_myaddr, /* SA */ 1755 ni->ni_macaddr, /* DA */ 1756 vap->iv_bss->ni_bssid, /* BSSID */ 1757 vap->iv_bss->ni_essid, 1758 vap->iv_bss->ni_esslen); /* SSID */ 1759 } 1760 1761 /* XXX not right for 802.1x/WPA */ 1762 ieee80211_node_authorize(ni); 1763 } 1764 return ni; 1765 } 1766 1767 void 1768 ieee80211_init_neighbor(struct ieee80211_node *ni, 1769 const struct ieee80211_frame *wh, 1770 const struct ieee80211_scanparams *sp) 1771 { 1772 int do_ht_setup = 0, do_vht_setup = 0; 1773 1774 ni->ni_esslen = sp->ssid[1]; 1775 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1776 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1777 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1778 ni->ni_intval = sp->bintval; 1779 ni->ni_capinfo = sp->capinfo; 1780 ni->ni_chan = ni->ni_ic->ic_curchan; 1781 ni->ni_fhdwell = sp->fhdwell; 1782 ni->ni_fhindex = sp->fhindex; 1783 ni->ni_erp = sp->erp; 1784 ni->ni_timoff = sp->timoff; 1785 #ifdef IEEE80211_SUPPORT_MESH 1786 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1787 ieee80211_mesh_init_neighbor(ni, wh, sp); 1788 #endif 1789 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1790 ieee80211_ies_expand(&ni->ni_ies); 1791 if (ni->ni_ies.wme_ie != NULL) 1792 ni->ni_flags |= IEEE80211_NODE_QOS; 1793 else 1794 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1795 #ifdef IEEE80211_SUPPORT_SUPERG 1796 if (ni->ni_ies.ath_ie != NULL) 1797 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1798 #endif 1799 if (ni->ni_ies.htcap_ie != NULL) 1800 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1801 if (ni->ni_ies.htinfo_ie != NULL) 1802 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1803 1804 if (ni->ni_ies.vhtcap_ie != NULL) 1805 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 1806 if (ni->ni_ies.vhtopmode_ie != NULL) 1807 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 1808 1809 if ((ni->ni_ies.htcap_ie != NULL) && 1810 (ni->ni_ies.htinfo_ie != NULL) && 1811 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1812 do_ht_setup = 1; 1813 } 1814 1815 if ((ni->ni_ies.vhtcap_ie != NULL) && 1816 (ni->ni_ies.vhtopmode_ie != NULL) && 1817 (ni->ni_vap->iv_flags_vht & IEEE80211_FVHT_VHT)) { 1818 do_vht_setup = 1; 1819 } 1820 } 1821 1822 /* NB: must be after ni_chan is setup */ 1823 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1824 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1825 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1826 1827 /* 1828 * If the neighbor is HT compatible, flip that on. 1829 */ 1830 if (do_ht_setup) { 1831 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1832 "%s: doing HT setup\n", __func__); 1833 ieee80211_ht_node_init(ni); 1834 ieee80211_ht_updateparams(ni, 1835 ni->ni_ies.htcap_ie, 1836 ni->ni_ies.htinfo_ie); 1837 1838 if (do_vht_setup) { 1839 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1840 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1841 __func__, 1842 ni->ni_macaddr, 1843 ":"); 1844 } else { 1845 ieee80211_vht_node_init(ni); 1846 ieee80211_vht_updateparams(ni, 1847 ni->ni_ies.vhtcap_ie, 1848 ni->ni_ies.vhtopmode_ie); 1849 ieee80211_setup_vht_rates(ni, 1850 ni->ni_ies.vhtcap_ie, 1851 ni->ni_ies.vhtopmode_ie); 1852 } 1853 } 1854 1855 /* 1856 * Finally do the channel upgrade/change based 1857 * on the HT/VHT configuration. 1858 */ 1859 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1860 ni->ni_ies.htinfo_ie); 1861 ieee80211_setup_htrates(ni, 1862 ni->ni_ies.htcap_ie, 1863 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1864 ieee80211_setup_basic_htrates(ni, 1865 ni->ni_ies.htinfo_ie); 1866 1867 ieee80211_node_setuptxparms(ni); 1868 ieee80211_ratectl_node_init(ni); 1869 1870 /* Reassociate; we're now 11n/11ac */ 1871 /* 1872 * XXX TODO: this is the wrong thing to do - 1873 * we're calling it with isnew=1 so the ath(4) 1874 * driver reinitialises the rate tables. 1875 * This "mostly" works for ath(4), but it won't 1876 * be right for firmware devices which allocate 1877 * node states. 1878 * 1879 * So, do we just create a new node and delete 1880 * the old one? Or? 1881 */ 1882 if (ni->ni_ic->ic_newassoc) 1883 ni->ni_ic->ic_newassoc(ni, 1); 1884 } 1885 } 1886 1887 /* 1888 * Do node discovery in adhoc mode on receipt of a beacon 1889 * or probe response frame. Note that for the driver's 1890 * benefit we we treat this like an association so the 1891 * driver has an opportunity to setup it's private state. 1892 */ 1893 struct ieee80211_node * 1894 ieee80211_add_neighbor(struct ieee80211vap *vap, 1895 const struct ieee80211_frame *wh, 1896 const struct ieee80211_scanparams *sp) 1897 { 1898 struct ieee80211_node *ni; 1899 1900 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1901 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1902 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1903 if (ni != NULL) { 1904 struct ieee80211com *ic = vap->iv_ic; 1905 1906 ieee80211_init_neighbor(ni, wh, sp); 1907 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1908 ni->ni_flags |= IEEE80211_NODE_ERP; 1909 ieee80211_node_setuptxparms(ni); 1910 ieee80211_ratectl_node_init(ni); 1911 if (ic->ic_newassoc != NULL) 1912 ic->ic_newassoc(ni, 1); 1913 /* XXX not right for 802.1x/WPA */ 1914 ieee80211_node_authorize(ni); 1915 } 1916 return ni; 1917 } 1918 1919 #define IS_PROBEREQ(wh) \ 1920 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1921 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1922 #define IS_BCAST_PROBEREQ(wh) \ 1923 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1924 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1925 1926 static __inline struct ieee80211_node * 1927 _find_rxnode(struct ieee80211_node_table *nt, 1928 const struct ieee80211_frame_min *wh) 1929 { 1930 if (IS_BCAST_PROBEREQ(wh)) 1931 return NULL; /* spam bcast probe req to all vap's */ 1932 return ieee80211_find_node_locked(nt, wh->i_addr2); 1933 } 1934 1935 /* 1936 * Locate the node for sender, track state, and then pass the 1937 * (referenced) node up to the 802.11 layer for its use. Note 1938 * we can return NULL if the sender is not in the table. 1939 */ 1940 struct ieee80211_node * 1941 #ifdef IEEE80211_DEBUG_REFCNT 1942 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1943 const struct ieee80211_frame_min *wh, const char *func, int line) 1944 #else 1945 ieee80211_find_rxnode(struct ieee80211com *ic, 1946 const struct ieee80211_frame_min *wh) 1947 #endif 1948 { 1949 struct ieee80211_node_table *nt; 1950 struct ieee80211_node *ni; 1951 1952 nt = &ic->ic_sta; 1953 IEEE80211_NODE_LOCK(nt); 1954 ni = _find_rxnode(nt, wh); 1955 IEEE80211_NODE_UNLOCK(nt); 1956 1957 return ni; 1958 } 1959 1960 /* 1961 * Like ieee80211_find_rxnode but use the supplied h/w 1962 * key index as a hint to locate the node in the key 1963 * mapping table. If an entry is present at the key 1964 * index we return it; otherwise do a normal lookup and 1965 * update the mapping table if the station has a unicast 1966 * key assigned to it. 1967 */ 1968 struct ieee80211_node * 1969 #ifdef IEEE80211_DEBUG_REFCNT 1970 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1971 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1972 const char *func, int line) 1973 #else 1974 ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1975 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1976 #endif 1977 { 1978 struct ieee80211_node_table *nt; 1979 struct ieee80211_node *ni; 1980 1981 nt = &ic->ic_sta; 1982 IEEE80211_NODE_LOCK(nt); 1983 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1984 ni = nt->nt_keyixmap[keyix]; 1985 else 1986 ni = NULL; 1987 if (ni == NULL) { 1988 ni = _find_rxnode(nt, wh); 1989 if (ni != NULL && nt->nt_keyixmap != NULL) { 1990 /* 1991 * If the station has a unicast key cache slot 1992 * assigned update the key->node mapping table. 1993 */ 1994 keyix = ni->ni_ucastkey.wk_rxkeyix; 1995 /* XXX can keyixmap[keyix] != NULL? */ 1996 if (keyix < nt->nt_keyixmax && 1997 nt->nt_keyixmap[keyix] == NULL) { 1998 IEEE80211_DPRINTF(ni->ni_vap, 1999 IEEE80211_MSG_NODE, 2000 "%s: add key map entry %p<%s> refcnt %d\n", 2001 __func__, ni, ether_sprintf(ni->ni_macaddr), 2002 ieee80211_node_refcnt(ni)+1); 2003 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 2004 } 2005 } 2006 } else { 2007 if (IS_BCAST_PROBEREQ(wh)) 2008 ni = NULL; /* spam bcast probe req to all vap's */ 2009 else 2010 ieee80211_ref_node(ni); 2011 } 2012 IEEE80211_NODE_UNLOCK(nt); 2013 2014 return ni; 2015 } 2016 #undef IS_BCAST_PROBEREQ 2017 #undef IS_PROBEREQ 2018 2019 /* 2020 * Return a reference to the appropriate node for sending 2021 * a data frame. This handles node discovery in adhoc networks. 2022 */ 2023 struct ieee80211_node * 2024 #ifdef IEEE80211_DEBUG_REFCNT 2025 ieee80211_find_txnode_debug(struct ieee80211vap *vap, 2026 const uint8_t macaddr[IEEE80211_ADDR_LEN], 2027 const char *func, int line) 2028 #else 2029 ieee80211_find_txnode(struct ieee80211vap *vap, 2030 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 2031 #endif 2032 { 2033 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 2034 struct ieee80211_node *ni; 2035 2036 /* 2037 * The destination address should be in the node table 2038 * unless this is a multicast/broadcast frame. We can 2039 * also optimize station mode operation, all frames go 2040 * to the bss node. 2041 */ 2042 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 2043 IEEE80211_NODE_LOCK(nt); 2044 if (vap->iv_opmode == IEEE80211_M_STA || 2045 vap->iv_opmode == IEEE80211_M_WDS || 2046 IEEE80211_IS_MULTICAST(macaddr)) 2047 ni = ieee80211_ref_node(vap->iv_bss); 2048 else 2049 ni = ieee80211_find_node_locked(nt, macaddr); 2050 IEEE80211_NODE_UNLOCK(nt); 2051 2052 if (ni == NULL) { 2053 if (vap->iv_opmode == IEEE80211_M_IBSS || 2054 vap->iv_opmode == IEEE80211_M_AHDEMO) { 2055 /* 2056 * In adhoc mode cons up a node for the destination. 2057 * Note that we need an additional reference for the 2058 * caller to be consistent with 2059 * ieee80211_find_node_locked. 2060 */ 2061 /* 2062 * XXX TODO: this doesn't fake up 11n state; we need 2063 * to find another way to get it upgraded. 2064 */ 2065 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 2066 if (ni != NULL) 2067 (void) ieee80211_ref_node(ni); 2068 } else { 2069 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 2070 "no node, discard frame (%s)", __func__); 2071 vap->iv_stats.is_tx_nonode++; 2072 } 2073 } 2074 return ni; 2075 } 2076 2077 static void 2078 _ieee80211_free_node(struct ieee80211_node *ni) 2079 { 2080 struct ieee80211_node_table *nt = ni->ni_table; 2081 2082 /* 2083 * NB: careful about referencing the vap as it may be 2084 * gone if the last reference was held by a driver. 2085 * We know the com will always be present so it's safe 2086 * to use ni_ic below to reclaim resources. 2087 */ 2088 #if 0 2089 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2090 "%s %p<%s> in %s table\n", __func__, ni, 2091 ether_sprintf(ni->ni_macaddr), 2092 nt != NULL ? nt->nt_name : "<gone>"); 2093 #endif 2094 if (ni->ni_associd != 0) { 2095 struct ieee80211vap *vap = ni->ni_vap; 2096 if (vap->iv_aid_bitmap != NULL) 2097 IEEE80211_AID_CLR(vap, ni->ni_associd); 2098 } 2099 if (nt != NULL) 2100 ieee80211_del_node_nt(nt, ni); 2101 ni->ni_ic->ic_node_free(ni); 2102 } 2103 2104 /* 2105 * Clear any entry in the unicast key mapping table. 2106 */ 2107 static int 2108 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2109 { 2110 ieee80211_keyix keyix; 2111 2112 keyix = ni->ni_ucastkey.wk_rxkeyix; 2113 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 2114 nt->nt_keyixmap[keyix] == ni) { 2115 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2116 "%s: %p<%s> clear key map entry %u\n", 2117 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 2118 nt->nt_keyixmap[keyix] = NULL; 2119 ieee80211_node_decref(ni); 2120 return 1; 2121 } 2122 2123 return 0; 2124 } 2125 2126 void 2127 #ifdef IEEE80211_DEBUG_REFCNT 2128 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 2129 #else 2130 ieee80211_free_node(struct ieee80211_node *ni) 2131 #endif 2132 { 2133 struct ieee80211_node_table *nt = ni->ni_table; 2134 2135 #ifdef IEEE80211_DEBUG_REFCNT 2136 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2137 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 2138 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 2139 #endif 2140 if (nt != NULL) { 2141 IEEE80211_NODE_LOCK(nt); 2142 if (ieee80211_node_dectestref(ni)) { 2143 /* 2144 * Last reference, reclaim state. 2145 */ 2146 _ieee80211_free_node(ni); 2147 } else if (ieee80211_node_refcnt(ni) == 1) 2148 if (node_clear_keyixmap(nt, ni)) 2149 _ieee80211_free_node(ni); 2150 IEEE80211_NODE_UNLOCK(nt); 2151 } else { 2152 if (ieee80211_node_dectestref(ni)) 2153 _ieee80211_free_node(ni); 2154 } 2155 } 2156 2157 /* 2158 * Reclaim a unicast key and clear any key cache state. 2159 */ 2160 int 2161 ieee80211_node_delucastkey(struct ieee80211_node *ni) 2162 { 2163 struct ieee80211com *ic = ni->ni_ic; 2164 struct ieee80211_node_table *nt = &ic->ic_sta; 2165 struct ieee80211_node *nikey; 2166 ieee80211_keyix keyix; 2167 int isowned, status; 2168 2169 /* 2170 * NB: We must beware of LOR here; deleting the key 2171 * can cause the crypto layer to block traffic updates 2172 * which can generate a LOR against the node table lock; 2173 * grab it here and stash the key index for our use below. 2174 * 2175 * Must also beware of recursion on the node table lock. 2176 * When called from node_cleanup we may already have 2177 * the node table lock held. Unfortunately there's no 2178 * way to separate out this path so we must do this 2179 * conditionally. 2180 */ 2181 isowned = IEEE80211_NODE_IS_LOCKED(nt); 2182 if (!isowned) 2183 IEEE80211_NODE_LOCK(nt); 2184 nikey = NULL; 2185 status = 1; /* NB: success */ 2186 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 2187 keyix = ni->ni_ucastkey.wk_rxkeyix; 2188 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 2189 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 2190 nikey = nt->nt_keyixmap[keyix]; 2191 nt->nt_keyixmap[keyix] = NULL; 2192 } 2193 } 2194 if (!isowned) 2195 IEEE80211_NODE_UNLOCK(nt); 2196 2197 if (nikey != NULL) { 2198 KASSERT(nikey == ni, 2199 ("key map out of sync, ni %p nikey %p", ni, nikey)); 2200 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2201 "%s: delete key map entry %p<%s> refcnt %d\n", 2202 __func__, ni, ether_sprintf(ni->ni_macaddr), 2203 ieee80211_node_refcnt(ni)-1); 2204 ieee80211_free_node(ni); 2205 } 2206 return status; 2207 } 2208 2209 /* 2210 * Reclaim a node. If this is the last reference count then 2211 * do the normal free work. Otherwise remove it from the node 2212 * table and mark it gone by clearing the back-reference. 2213 */ 2214 static void 2215 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2216 { 2217 2218 IEEE80211_NODE_LOCK_ASSERT(nt); 2219 2220 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2221 "%s: remove %p<%s> from %s table, refcnt %d\n", 2222 __func__, ni, ether_sprintf(ni->ni_macaddr), 2223 nt->nt_name, ieee80211_node_refcnt(ni)-1); 2224 /* 2225 * Clear any entry in the unicast key mapping table. 2226 * We need to do it here so rx lookups don't find it 2227 * in the mapping table even if it's not in the hash 2228 * table. We cannot depend on the mapping table entry 2229 * being cleared because the node may not be free'd. 2230 */ 2231 (void)node_clear_keyixmap(nt, ni); 2232 if (!ieee80211_node_dectestref(ni)) { 2233 /* 2234 * Other references are present, just remove the 2235 * node from the table so it cannot be found. When 2236 * the references are dropped storage will be 2237 * reclaimed. 2238 */ 2239 ieee80211_del_node_nt(nt, ni); 2240 } else 2241 _ieee80211_free_node(ni); 2242 } 2243 2244 /* 2245 * Node table support. 2246 */ 2247 2248 static void 2249 ieee80211_node_table_init(struct ieee80211com *ic, 2250 struct ieee80211_node_table *nt, 2251 const char *name, int inact, int keyixmax) 2252 { 2253 2254 nt->nt_ic = ic; 2255 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 2256 TAILQ_INIT(&nt->nt_node); 2257 nt->nt_count = 0; 2258 nt->nt_name = name; 2259 nt->nt_inact_init = inact; 2260 nt->nt_keyixmax = keyixmax; 2261 if (nt->nt_keyixmax > 0) { 2262 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 2263 keyixmax * sizeof(struct ieee80211_node *), 2264 M_80211_NODE, 2265 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2266 if (nt->nt_keyixmap == NULL) 2267 ic_printf(ic, 2268 "Cannot allocate key index map with %u entries\n", 2269 keyixmax); 2270 } else 2271 nt->nt_keyixmap = NULL; 2272 } 2273 2274 static void 2275 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 2276 struct ieee80211vap *match) 2277 { 2278 struct ieee80211_node *ni, *next; 2279 2280 IEEE80211_NODE_LOCK(nt); 2281 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 2282 if (match != NULL && ni->ni_vap != match) 2283 continue; 2284 /* XXX can this happen? if so need's work */ 2285 if (ni->ni_associd != 0) { 2286 struct ieee80211vap *vap = ni->ni_vap; 2287 2288 if (vap->iv_auth->ia_node_leave != NULL) 2289 vap->iv_auth->ia_node_leave(ni); 2290 if (vap->iv_aid_bitmap != NULL) 2291 IEEE80211_AID_CLR(vap, ni->ni_associd); 2292 } 2293 ni->ni_wdsvap = NULL; /* clear reference */ 2294 node_reclaim(nt, ni); 2295 } 2296 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 2297 /* 2298 * Make a separate pass to clear references to this vap 2299 * held by DWDS entries. They will not be matched above 2300 * because ni_vap will point to the ap vap but we still 2301 * need to clear ni_wdsvap when the WDS vap is destroyed 2302 * and/or reset. 2303 */ 2304 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 2305 if (ni->ni_wdsvap == match) 2306 ni->ni_wdsvap = NULL; 2307 } 2308 IEEE80211_NODE_UNLOCK(nt); 2309 } 2310 2311 static void 2312 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2313 { 2314 ieee80211_node_table_reset(nt, NULL); 2315 if (nt->nt_keyixmap != NULL) { 2316 #ifdef DIAGNOSTIC 2317 /* XXX verify all entries are NULL */ 2318 int i; 2319 for (i = 0; i < nt->nt_keyixmax; i++) 2320 if (nt->nt_keyixmap[i] != NULL) 2321 printf("%s: %s[%u] still active\n", __func__, 2322 nt->nt_name, i); 2323 #endif 2324 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 2325 nt->nt_keyixmap = NULL; 2326 } 2327 IEEE80211_NODE_LOCK_DESTROY(nt); 2328 } 2329 2330 static void 2331 timeout_stations(void *arg __unused, struct ieee80211_node *ni) 2332 { 2333 struct ieee80211com *ic = ni->ni_ic; 2334 struct ieee80211vap *vap = ni->ni_vap; 2335 2336 /* 2337 * Only process stations when in RUN state. This 2338 * insures, for example, that we don't timeout an 2339 * inactive station during CAC. Note that CSA state 2340 * is actually handled in ieee80211_node_timeout as 2341 * it applies to more than timeout processing. 2342 */ 2343 if (vap->iv_state != IEEE80211_S_RUN) 2344 return; 2345 /* 2346 * Ignore entries for which have yet to receive an 2347 * authentication frame. These are transient and 2348 * will be reclaimed when the last reference to them 2349 * goes away (when frame xmits complete). 2350 */ 2351 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2352 vap->iv_opmode == IEEE80211_M_STA) && 2353 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2354 return; 2355 /* 2356 * Free fragment if not needed anymore 2357 * (last fragment older than 1s). 2358 * XXX doesn't belong here, move to node_age 2359 */ 2360 if (ni->ni_rxfrag[0] != NULL && 2361 ticks > ni->ni_rxfragstamp + hz) { 2362 m_freem(ni->ni_rxfrag[0]); 2363 ni->ni_rxfrag[0] = NULL; 2364 } 2365 if (ni->ni_inact > 0) { 2366 ni->ni_inact--; 2367 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2368 "%s: inact %u inact_reload %u nrates %u", 2369 __func__, ni->ni_inact, ni->ni_inact_reload, 2370 ni->ni_rates.rs_nrates); 2371 } 2372 /* 2373 * Special case ourself; we may be idle for extended periods 2374 * of time and regardless reclaiming our state is wrong. 2375 * XXX run ic_node_age 2376 */ 2377 /* XXX before inact decrement? */ 2378 if (ni == vap->iv_bss) 2379 return; 2380 if (ni->ni_associd != 0 || 2381 (vap->iv_opmode == IEEE80211_M_IBSS || 2382 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2383 /* 2384 * Age/drain resources held by the station. 2385 */ 2386 ic->ic_node_age(ni); 2387 /* 2388 * Probe the station before time it out. We 2389 * send a null data frame which may not be 2390 * universally supported by drivers (need it 2391 * for ps-poll support so it should be...). 2392 * 2393 * XXX don't probe the station unless we've 2394 * received a frame from them (and have 2395 * some idea of the rates they are capable 2396 * of); this will get fixed more properly 2397 * soon with better handling of the rate set. 2398 */ 2399 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2400 (0 < ni->ni_inact && 2401 ni->ni_inact <= vap->iv_inact_probe) && 2402 ni->ni_rates.rs_nrates != 0) { 2403 IEEE80211_NOTE(vap, 2404 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2405 ni, "%s", 2406 "probe station due to inactivity"); 2407 /* 2408 * Grab a reference so the node cannot 2409 * be reclaimed before we send the frame. 2410 * ieee80211_send_nulldata understands 2411 * we've done this and reclaims the 2412 * ref for us as needed. 2413 */ 2414 /* XXX fix this (not required anymore). */ 2415 ieee80211_ref_node(ni); 2416 /* XXX useless */ 2417 ieee80211_send_nulldata(ni); 2418 /* XXX stat? */ 2419 return; 2420 } 2421 } 2422 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2423 ni->ni_inact <= 0) { 2424 IEEE80211_NOTE(vap, 2425 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2426 "station timed out due to inactivity " 2427 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2428 /* 2429 * Send a deauthenticate frame and drop the station. 2430 * This is somewhat complicated due to reference counts 2431 * and locking. At this point a station will typically 2432 * have a reference count of 2. ieee80211_node_leave 2433 * will do a "free" of the node which will drop the 2434 * reference count. But in the meantime a reference 2435 * wil be held by the deauth frame. The actual reclaim 2436 * of the node will happen either after the tx is 2437 * completed or by ieee80211_node_leave. 2438 */ 2439 if (ni->ni_associd != 0) { 2440 IEEE80211_SEND_MGMT(ni, 2441 IEEE80211_FC0_SUBTYPE_DEAUTH, 2442 IEEE80211_REASON_AUTH_EXPIRE); 2443 } 2444 ieee80211_node_leave(ni); 2445 vap->iv_stats.is_node_timeout++; 2446 } 2447 } 2448 2449 /* 2450 * Timeout inactive stations and do related housekeeping. 2451 */ 2452 static void 2453 ieee80211_timeout_stations(struct ieee80211com *ic) 2454 { 2455 struct ieee80211_node_table *nt = &ic->ic_sta; 2456 2457 ieee80211_iterate_nodes(nt, timeout_stations, NULL); 2458 } 2459 2460 /* 2461 * Aggressively reclaim resources. This should be used 2462 * only in a critical situation to reclaim mbuf resources. 2463 */ 2464 void 2465 ieee80211_drain(struct ieee80211com *ic) 2466 { 2467 struct ieee80211_node_table *nt = &ic->ic_sta; 2468 struct ieee80211vap *vap; 2469 struct ieee80211_node *ni; 2470 2471 IEEE80211_NODE_LOCK(nt); 2472 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2473 /* 2474 * Ignore entries for which have yet to receive an 2475 * authentication frame. These are transient and 2476 * will be reclaimed when the last reference to them 2477 * goes away (when frame xmits complete). 2478 */ 2479 vap = ni->ni_vap; 2480 /* 2481 * Only process stations when in RUN state. This 2482 * insures, for example, that we don't timeout an 2483 * inactive station during CAC. Note that CSA state 2484 * is actually handled in ieee80211_node_timeout as 2485 * it applies to more than timeout processing. 2486 */ 2487 if (vap->iv_state != IEEE80211_S_RUN) 2488 continue; 2489 /* XXX can vap be NULL? */ 2490 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2491 vap->iv_opmode == IEEE80211_M_STA) && 2492 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2493 continue; 2494 /* 2495 * Free fragments. 2496 * XXX doesn't belong here, move to node_drain 2497 */ 2498 if (ni->ni_rxfrag[0] != NULL) { 2499 m_freem(ni->ni_rxfrag[0]); 2500 ni->ni_rxfrag[0] = NULL; 2501 } 2502 /* 2503 * Drain resources held by the station. 2504 */ 2505 ic->ic_node_drain(ni); 2506 } 2507 IEEE80211_NODE_UNLOCK(nt); 2508 } 2509 2510 /* 2511 * Per-ieee80211vap inactivity timer callback. 2512 */ 2513 static void 2514 ieee80211_vap_timeout(struct ieee80211vap *vap) 2515 { 2516 2517 IEEE80211_LOCK_ASSERT(vap->iv_ic); 2518 2519 ieee80211_vap_erp_timeout(vap); 2520 ieee80211_ht_timeout(vap); 2521 ieee80211_vht_timeout(vap); 2522 } 2523 2524 /* 2525 * Per-ieee80211com inactivity timer callback. 2526 */ 2527 void 2528 ieee80211_node_timeout(void *arg) 2529 { 2530 struct ieee80211com *ic = arg; 2531 struct ieee80211vap *vap; 2532 2533 /* 2534 * Defer timeout processing if a channel switch is pending. 2535 * We typically need to be mute so not doing things that 2536 * might generate frames is good to handle in one place. 2537 * Suppressing the station timeout processing may extend the 2538 * lifetime of inactive stations (by not decrementing their 2539 * idle counters) but this should be ok unless the CSA is 2540 * active for an unusually long time. 2541 */ 2542 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2543 ieee80211_scan_timeout(ic); 2544 ieee80211_timeout_stations(ic); 2545 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2546 2547 IEEE80211_LOCK(ic); 2548 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2549 ieee80211_vap_timeout(vap); 2550 IEEE80211_UNLOCK(ic); 2551 } 2552 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2553 ieee80211_node_timeout, ic); 2554 } 2555 2556 /* 2557 * The same as ieee80211_iterate_nodes(), but for one vap only. 2558 */ 2559 int 2560 ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt, 2561 struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg) 2562 { 2563 struct ieee80211_node **ni_arr; 2564 struct ieee80211_node *ni; 2565 size_t size; 2566 int count, i; 2567 2568 /* 2569 * Iterate over the node table and save an array of ref'ed nodes. 2570 * 2571 * This is separated out from calling the actual node function so that 2572 * no LORs will occur. 2573 */ 2574 IEEE80211_NODE_LOCK(nt); 2575 count = nt->nt_count; 2576 size = count * sizeof(struct ieee80211_node *); 2577 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2578 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2579 if (ni_arr == NULL) { 2580 IEEE80211_NODE_UNLOCK(nt); 2581 return (ENOMEM); 2582 } 2583 2584 i = 0; 2585 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2586 if (vap != NULL && ni->ni_vap != vap) 2587 continue; 2588 KASSERT(i < count, 2589 ("node array overflow (vap %p, i %d, count %d)\n", 2590 vap, i, count)); 2591 ni_arr[i] = ieee80211_ref_node(ni); 2592 i++; 2593 } 2594 IEEE80211_NODE_UNLOCK(nt); 2595 2596 for (i = 0; i < count; i++) { 2597 if (ni_arr[i] == NULL) /* end of the list */ 2598 break; 2599 (*f)(arg, ni_arr[i]); 2600 /* ieee80211_free_node() locks by itself */ 2601 ieee80211_free_node(ni_arr[i]); 2602 } 2603 2604 IEEE80211_FREE(ni_arr, M_80211_NODE); 2605 2606 return (0); 2607 } 2608 2609 /* 2610 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2611 * reference in the source. 2612 */ 2613 void 2614 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2615 ieee80211_iter_func *f, void *arg) 2616 { 2617 /* XXX no way to pass error to the caller. */ 2618 (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg); 2619 } 2620 2621 void 2622 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2623 { 2624 printf("0x%p: mac %s refcnt %d\n", ni, 2625 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2626 printf("\tauthmode %u flags 0x%x\n", 2627 ni->ni_authmode, ni->ni_flags); 2628 printf("\tassocid 0x%x txpower %u vlan %u\n", 2629 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2630 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2631 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2632 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2633 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2634 ni->ni_rxfragstamp); 2635 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2636 node_getrssi(ni), ni->ni_noise, 2637 ni->ni_intval, ni->ni_capinfo); 2638 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2639 ether_sprintf(ni->ni_bssid), 2640 ni->ni_esslen, ni->ni_essid, 2641 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2642 printf("\tinact %u inact_reload %u txrate %u\n", 2643 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2644 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2645 ni->ni_htcap, ni->ni_htparam, 2646 ni->ni_htctlchan, ni->ni_ht2ndchan); 2647 printf("\thtopmode %x htstbc %x htchw %u\n", 2648 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2649 printf("\tvhtcap %x freq1 %d freq2 %d vhtbasicmcs %x\n", 2650 ni->ni_vhtcap, (int) ni->ni_vht_chan1, (int) ni->ni_vht_chan2, 2651 (int) ni->ni_vht_basicmcs); 2652 /* XXX VHT state */ 2653 } 2654 2655 void 2656 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2657 { 2658 ieee80211_iterate_nodes(nt, 2659 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2660 } 2661 2662 /* 2663 * Iterate over the VAPs and update their ERP beacon IEs. 2664 * 2665 * Note this must be called from the deferred ERP update task paths. 2666 */ 2667 void 2668 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2669 { 2670 struct ieee80211vap *vap; 2671 2672 IEEE80211_LOCK_ASSERT(ic); 2673 2674 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2675 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2676 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2677 } 2678 2679 /* 2680 * Handle a station joining an 11g network. 2681 */ 2682 static void 2683 ieee80211_node_join_11g(struct ieee80211_node *ni) 2684 { 2685 struct ieee80211com *ic = ni->ni_ic; 2686 struct ieee80211vap *vap = ni->ni_vap; 2687 2688 IEEE80211_LOCK_ASSERT(ic); 2689 2690 /* 2691 * Station isn't capable of short slot time. Bump 2692 * the count of long slot time stations and disable 2693 * use of short slot time. Note that the actual switch 2694 * over to long slot time use may not occur until the 2695 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2696 */ 2697 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2698 vap->iv_longslotsta++; 2699 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2700 "station needs long slot time, count %d", 2701 vap->iv_longslotsta); 2702 /* 2703 * XXX TODO: this may need all VAPs checked! 2704 */ 2705 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2706 /* 2707 * Don't force slot time when switched to turbo 2708 * mode as non-ERP stations won't be present; this 2709 * need only be done when on the normal G channel. 2710 */ 2711 ieee80211_vap_set_shortslottime(vap, 0); 2712 } 2713 } 2714 /* 2715 * If the new station is not an ERP station 2716 * then bump the counter and enable protection 2717 * if configured. 2718 */ 2719 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2720 vap->iv_nonerpsta++; 2721 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2722 "station is !ERP, %d non-ERP stations associated", 2723 vap->iv_nonerpsta); 2724 /* 2725 * If station does not support short preamble 2726 * then we must enable use of Barker preamble. 2727 */ 2728 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2729 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2730 "%s", "station needs long preamble"); 2731 vap->iv_flags |= IEEE80211_F_USEBARKER; 2732 vap->iv_flags &= ~IEEE80211_F_SHPREAMBLE; 2733 ieee80211_vap_update_preamble(vap); 2734 } 2735 /* 2736 * If protection is configured and this is the first 2737 * indication we should use protection, enable it. 2738 */ 2739 if (vap->iv_protmode != IEEE80211_PROT_NONE && 2740 vap->iv_nonerpsta == 1 && 2741 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2742 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2743 "%s: enable use of protection\n", __func__); 2744 vap->iv_flags |= IEEE80211_F_USEPROT; 2745 ieee80211_vap_update_erp_protmode(vap); 2746 } 2747 } else 2748 ni->ni_flags |= IEEE80211_NODE_ERP; 2749 } 2750 2751 void 2752 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2753 { 2754 struct ieee80211com *ic = ni->ni_ic; 2755 struct ieee80211vap *vap = ni->ni_vap; 2756 int newassoc; 2757 2758 if (ni->ni_associd == 0) { 2759 uint16_t aid; 2760 2761 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2762 /* 2763 * It would be good to search the bitmap 2764 * more efficiently, but this will do for now. 2765 */ 2766 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2767 if (!IEEE80211_AID_ISSET(vap, aid)) 2768 break; 2769 } 2770 if (aid >= vap->iv_max_aid) { 2771 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2772 ieee80211_node_leave(ni); 2773 return; 2774 } 2775 ni->ni_associd = aid | 0xc000; 2776 ni->ni_jointime = time_uptime; 2777 IEEE80211_LOCK(ic); 2778 IEEE80211_AID_SET(vap, ni->ni_associd); 2779 vap->iv_sta_assoc++; 2780 2781 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2782 ieee80211_ht_node_join(ni); 2783 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2784 ieee80211_vht_node_join(ni); 2785 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2786 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2787 ieee80211_node_join_11g(ni); 2788 IEEE80211_UNLOCK(ic); 2789 2790 newassoc = 1; 2791 } else 2792 newassoc = 0; 2793 2794 /* 2795 * XXX VHT - should log VHT channel width, etc 2796 */ 2797 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2798 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s%s", 2799 IEEE80211_NODE_AID(ni), 2800 vap->iv_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2801 vap->iv_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2802 vap->iv_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2803 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2804 /* XXX update for VHT string */ 2805 ni->ni_flags & IEEE80211_NODE_HT ? 2806 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2807 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2808 ni->ni_flags & IEEE80211_NODE_AMSDU ? " (+AMSDU)" : "", 2809 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2810 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2811 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2812 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2813 ", fast-frames" : "", 2814 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2815 ", turbo" : "" 2816 ); 2817 2818 ieee80211_node_setuptxparms(ni); 2819 ieee80211_ratectl_node_init(ni); 2820 /* give driver a chance to setup state like ni_txrate */ 2821 if (ic->ic_newassoc != NULL) 2822 ic->ic_newassoc(ni, newassoc); 2823 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2824 /* tell the authenticator about new station */ 2825 if (vap->iv_auth->ia_node_join != NULL) 2826 vap->iv_auth->ia_node_join(ni); 2827 ieee80211_notify_node_join(ni, 2828 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2829 } 2830 2831 static void 2832 disable_protection(struct ieee80211vap *vap) 2833 { 2834 struct ieee80211com *ic = vap->iv_ic; 2835 2836 KASSERT(vap->iv_nonerpsta == 0 && 2837 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2838 ("%d non ERP stations, flags 0x%x", vap->iv_nonerpsta, 2839 vap->iv_flags_ext)); 2840 2841 vap->iv_flags &= ~IEEE80211_F_USEPROT; 2842 /* XXX verify mode? */ 2843 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2844 vap->iv_flags |= IEEE80211_F_SHPREAMBLE; 2845 vap->iv_flags &= ~IEEE80211_F_USEBARKER; 2846 } 2847 ieee80211_vap_update_erp_protmode(vap); 2848 ieee80211_vap_update_preamble(vap); 2849 } 2850 2851 /* 2852 * Handle a station leaving an 11g network. 2853 */ 2854 static void 2855 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2856 { 2857 struct ieee80211com *ic = ni->ni_ic; 2858 struct ieee80211vap *vap = ni->ni_vap; 2859 2860 IEEE80211_LOCK_ASSERT(ic); 2861 2862 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2863 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2864 ic->ic_bsschan->ic_flags)); 2865 2866 /* 2867 * If a long slot station do the slot time bookkeeping. 2868 */ 2869 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2870 KASSERT(vap->iv_longslotsta > 0, 2871 ("bogus long slot station count %d", vap->iv_longslotsta)); 2872 vap->iv_longslotsta--; 2873 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2874 "long slot time station leaves, count now %d", 2875 vap->iv_longslotsta); 2876 /* 2877 * XXX TODO: this may need all VAPs checked! 2878 */ 2879 if (vap->iv_longslotsta == 0) { 2880 /* 2881 * Re-enable use of short slot time if supported 2882 * and not operating in IBSS mode (per spec). 2883 */ 2884 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2885 ic->ic_opmode != IEEE80211_M_IBSS) { 2886 IEEE80211_DPRINTF(ni->ni_vap, 2887 IEEE80211_MSG_ASSOC, 2888 "%s: re-enable use of short slot time\n", 2889 __func__); 2890 ieee80211_vap_set_shortslottime(vap, 1); 2891 } 2892 } 2893 } 2894 /* 2895 * If a non-ERP station do the protection-related bookkeeping. 2896 */ 2897 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2898 KASSERT(vap->iv_nonerpsta > 0, 2899 ("bogus non-ERP station count %d", vap->iv_nonerpsta)); 2900 vap->iv_nonerpsta--; 2901 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2902 "non-ERP station leaves, count now %d%s", vap->iv_nonerpsta, 2903 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2904 " (non-ERP sta present)" : ""); 2905 if (vap->iv_nonerpsta == 0 && 2906 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2907 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2908 "%s: disable use of protection\n", __func__); 2909 disable_protection(vap); 2910 } 2911 } 2912 } 2913 2914 /* 2915 * Time out presence of an overlapping bss with non-ERP 2916 * stations. When operating in hostap mode we listen for 2917 * beacons from other stations and if we identify a non-ERP 2918 * station is present we enable protection. To identify 2919 * when all non-ERP stations are gone we time out this 2920 * condition. 2921 */ 2922 static void 2923 ieee80211_vap_erp_timeout(struct ieee80211vap *vap) 2924 { 2925 2926 IEEE80211_LOCK_ASSERT(vap->iv_ic); 2927 2928 if ((vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2929 ieee80211_time_after(ticks, vap->iv_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2930 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 2931 "%s", "age out non-ERP sta present on channel"); 2932 vap->iv_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2933 if (vap->iv_nonerpsta == 0) 2934 disable_protection(vap); 2935 } 2936 } 2937 2938 /* 2939 * Handle bookkeeping for station deauthentication/disassociation 2940 * when operating as an ap. 2941 */ 2942 void 2943 ieee80211_node_leave(struct ieee80211_node *ni) 2944 { 2945 struct ieee80211com *ic = ni->ni_ic; 2946 struct ieee80211vap *vap = ni->ni_vap; 2947 struct ieee80211_node_table *nt = ni->ni_table; 2948 2949 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2950 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2951 2952 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2953 ("unexpected operating mode %u", vap->iv_opmode)); 2954 /* 2955 * If node wasn't previously associated all 2956 * we need to do is reclaim the reference. 2957 */ 2958 /* XXX ibss mode bypasses 11g and notification */ 2959 if (ni->ni_associd == 0) 2960 goto done; 2961 /* 2962 * Tell the authenticator the station is leaving. 2963 * Note that we must do this before yanking the 2964 * association id as the authenticator uses the 2965 * associd to locate it's state block. 2966 */ 2967 if (vap->iv_auth->ia_node_leave != NULL) 2968 vap->iv_auth->ia_node_leave(ni); 2969 2970 IEEE80211_LOCK(ic); 2971 IEEE80211_AID_CLR(vap, ni->ni_associd); 2972 vap->iv_sta_assoc--; 2973 2974 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2975 ieee80211_vht_node_leave(ni); 2976 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2977 ieee80211_ht_node_leave(ni); 2978 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2979 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2980 ieee80211_node_leave_11g(ni); 2981 IEEE80211_UNLOCK(ic); 2982 /* 2983 * Cleanup station state. In particular clear various 2984 * state that might otherwise be reused if the node 2985 * is reused before the reference count goes to zero 2986 * (and memory is reclaimed). 2987 */ 2988 ieee80211_sta_leave(ni); 2989 done: 2990 /* 2991 * Remove the node from any table it's recorded in and 2992 * drop the caller's reference. Removal from the table 2993 * is important to insure the node is not reprocessed 2994 * for inactivity. 2995 */ 2996 if (nt != NULL) { 2997 IEEE80211_NODE_LOCK(nt); 2998 node_reclaim(nt, ni); 2999 IEEE80211_NODE_UNLOCK(nt); 3000 } else 3001 ieee80211_free_node(ni); 3002 } 3003 3004 struct rssiinfo { 3005 int rssi_samples; 3006 uint32_t rssi_total; 3007 }; 3008 3009 static void 3010 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 3011 { 3012 struct rssiinfo *info = arg; 3013 struct ieee80211vap *vap = ni->ni_vap; 3014 int8_t rssi; 3015 3016 /* only associated stations */ 3017 if (ni->ni_associd == 0) 3018 return; 3019 rssi = vap->iv_ic->ic_node_getrssi(ni); 3020 if (rssi != 0) { 3021 info->rssi_samples++; 3022 info->rssi_total += rssi; 3023 } 3024 } 3025 3026 static void 3027 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 3028 { 3029 struct rssiinfo *info = arg; 3030 struct ieee80211vap *vap = ni->ni_vap; 3031 int8_t rssi; 3032 3033 /* only neighbors */ 3034 /* XXX check bssid */ 3035 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 3036 return; 3037 rssi = vap->iv_ic->ic_node_getrssi(ni); 3038 if (rssi != 0) { 3039 info->rssi_samples++; 3040 info->rssi_total += rssi; 3041 } 3042 } 3043 3044 #ifdef IEEE80211_SUPPORT_MESH 3045 static void 3046 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 3047 { 3048 struct rssiinfo *info = arg; 3049 struct ieee80211vap *vap = ni->ni_vap; 3050 int8_t rssi; 3051 3052 /* only neighbors that peered successfully */ 3053 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 3054 return; 3055 rssi = vap->iv_ic->ic_node_getrssi(ni); 3056 if (rssi != 0) { 3057 info->rssi_samples++; 3058 info->rssi_total += rssi; 3059 } 3060 } 3061 #endif /* IEEE80211_SUPPORT_MESH */ 3062 3063 int8_t 3064 ieee80211_getrssi(struct ieee80211vap *vap) 3065 { 3066 #define NZ(x) ((x) == 0 ? 1 : (x)) 3067 struct ieee80211com *ic = vap->iv_ic; 3068 struct rssiinfo info; 3069 3070 info.rssi_total = 0; 3071 info.rssi_samples = 0; 3072 switch (vap->iv_opmode) { 3073 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 3074 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 3075 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi, 3076 &info); 3077 break; 3078 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 3079 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi, 3080 &info); 3081 break; 3082 #ifdef IEEE80211_SUPPORT_MESH 3083 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 3084 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi, 3085 &info); 3086 break; 3087 #endif 3088 case IEEE80211_M_MONITOR: /* XXX */ 3089 case IEEE80211_M_STA: /* use stats from associated ap */ 3090 default: 3091 if (vap->iv_bss != NULL) 3092 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 3093 info.rssi_samples = 1; 3094 break; 3095 } 3096 return info.rssi_total / NZ(info.rssi_samples); 3097 #undef NZ 3098 } 3099 3100 void 3101 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 3102 { 3103 3104 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 3105 return; 3106 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 3107 /* for non-station mode return avg'd rssi accounting */ 3108 if (vap->iv_opmode != IEEE80211_M_STA) 3109 *rssi = ieee80211_getrssi(vap); 3110 } 3111