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