1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 #include "opt_wlan.h" 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/mbuf.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 38 #include <sys/socket.h> 39 40 #include <net/if.h> 41 #include <net/if_var.h> 42 #include <net/if_media.h> 43 #include <net/ethernet.h> 44 45 #include <net80211/ieee80211_var.h> 46 #include <net80211/ieee80211_input.h> 47 #ifdef IEEE80211_SUPPORT_SUPERG 48 #include <net80211/ieee80211_superg.h> 49 #endif 50 #ifdef IEEE80211_SUPPORT_TDMA 51 #include <net80211/ieee80211_tdma.h> 52 #endif 53 #include <net80211/ieee80211_wds.h> 54 #include <net80211/ieee80211_mesh.h> 55 #include <net80211/ieee80211_ratectl.h> 56 #include <net80211/ieee80211_vht.h> 57 58 #include <net/bpf.h> 59 60 #ifdef IEEE80211_DEBUG_REFCNT 61 #define __debrefcnt_used 62 #else 63 #define __debrefcnt_used __unused 64 #endif 65 66 /* 67 * IEEE80211_NODE_HASHSIZE must be a power of 2. 68 */ 69 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 70 71 /* 72 * Association id's are managed with a bit vector. 73 */ 74 #define IEEE80211_AID_SET(_vap, b) \ 75 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 76 (1 << (IEEE80211_AID(b) % 32))) 77 #define IEEE80211_AID_CLR(_vap, b) \ 78 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 79 ~(1 << (IEEE80211_AID(b) % 32))) 80 #define IEEE80211_AID_ISSET(_vap, b) \ 81 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 82 83 static int ieee80211_sta_join1(struct ieee80211_node *); 84 85 static struct ieee80211_node *ieee80211_alloc_node( 86 struct ieee80211_node_table *, struct ieee80211vap *, 87 const uint8_t macaddr[IEEE80211_ADDR_LEN]); 88 static struct ieee80211_node *node_alloc(struct ieee80211vap *, 89 const uint8_t [IEEE80211_ADDR_LEN]); 90 static int node_init(struct ieee80211_node *); 91 static void node_cleanup(struct ieee80211_node *); 92 static void node_free(struct ieee80211_node *); 93 static void node_age(struct ieee80211_node *); 94 static int8_t node_getrssi(const struct ieee80211_node *); 95 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 96 static void node_getmimoinfo(const struct ieee80211_node *, 97 struct ieee80211_mimo_info *); 98 99 static void __ieee80211_free_node(struct ieee80211_node *); 100 101 static void node_reclaim(struct ieee80211_node_table *nt, 102 struct ieee80211_node *ni); 103 static void ieee80211_node_table_init(struct ieee80211com *ic, 104 struct ieee80211_node_table *nt, const char *name, 105 int inact, int keymaxix); 106 static void ieee80211_node_table_reset(struct ieee80211_node_table *, 107 struct ieee80211vap *); 108 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 109 static void ieee80211_vap_erp_timeout(struct ieee80211vap *); 110 111 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 112 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 113 114 void 115 ieee80211_node_attach(struct ieee80211com *ic) 116 { 117 /* XXX really want maxlen enforced per-sta */ 118 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 119 "802.11 staging q"); 120 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 121 IEEE80211_INACT_INIT, ic->ic_max_keyix); 122 callout_init(&ic->ic_inact, 1); 123 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 124 ieee80211_node_timeout, ic); 125 126 ic->ic_node_alloc = node_alloc; 127 ic->ic_node_init = node_init; 128 ic->ic_node_free = node_free; 129 ic->ic_node_cleanup = node_cleanup; 130 ic->ic_node_age = node_age; 131 ic->ic_node_drain = node_age; /* NB: same as age */ 132 ic->ic_node_getrssi = node_getrssi; 133 ic->ic_node_getsignal = node_getsignal; 134 ic->ic_node_getmimoinfo = node_getmimoinfo; 135 136 /* 137 * Set flags to be propagated to all vap's; 138 * these define default behaviour/configuration. 139 */ 140 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 141 } 142 143 void 144 ieee80211_node_detach(struct ieee80211com *ic) 145 { 146 147 callout_drain(&ic->ic_inact); 148 ieee80211_node_table_cleanup(&ic->ic_sta); 149 ieee80211_ageq_drain(&ic->ic_stageq); 150 ieee80211_ageq_cleanup(&ic->ic_stageq); 151 } 152 153 void 154 ieee80211_node_vattach(struct ieee80211vap *vap) 155 { 156 /* NB: driver can override */ 157 vap->iv_max_aid = IEEE80211_AID_DEF; 158 159 /* default station inactivity timer settings */ 160 vap->iv_inact_init = IEEE80211_INACT_INIT; 161 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 162 vap->iv_inact_run = IEEE80211_INACT_RUN; 163 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 164 165 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 166 "%s: init %u auth %u run %u probe %u\n", __func__, 167 vap->iv_inact_init, vap->iv_inact_auth, 168 vap->iv_inact_run, vap->iv_inact_probe); 169 } 170 171 void 172 ieee80211_node_latevattach(struct ieee80211vap *vap) 173 { 174 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 175 /* XXX should we allow max aid to be zero? */ 176 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 177 vap->iv_max_aid = IEEE80211_AID_MIN; 178 if_printf(vap->iv_ifp, 179 "WARNING: max aid too small, changed to %d\n", 180 vap->iv_max_aid); 181 } 182 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( 183 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 184 M_80211_NODE, 185 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 186 if (vap->iv_aid_bitmap == NULL) { 187 /* XXX no way to recover */ 188 printf("%s: no memory for AID bitmap, max aid %d!\n", 189 __func__, vap->iv_max_aid); 190 vap->iv_max_aid = 0; 191 } 192 } 193 194 ieee80211_reset_bss(vap); 195 196 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 197 } 198 199 void 200 ieee80211_node_vdetach(struct ieee80211vap *vap) 201 { 202 struct ieee80211com *ic = vap->iv_ic; 203 204 ieee80211_node_table_reset(&ic->ic_sta, vap); 205 if (vap->iv_bss != NULL) { 206 ieee80211_free_node(vap->iv_bss); 207 vap->iv_update_bss(vap, NULL); 208 } 209 if (vap->iv_aid_bitmap != NULL) { 210 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); 211 vap->iv_aid_bitmap = NULL; 212 } 213 } 214 215 /* 216 * Port authorize/unauthorize interfaces for use by an authenticator. 217 */ 218 219 void 220 ieee80211_node_authorize(struct ieee80211_node *ni) 221 { 222 struct ieee80211vap *vap = ni->ni_vap; 223 224 ni->ni_flags |= IEEE80211_NODE_AUTH; 225 ni->ni_inact_reload = vap->iv_inact_run; 226 ni->ni_inact = ni->ni_inact_reload; 227 228 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 229 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 230 } 231 232 void 233 ieee80211_node_unauthorize(struct ieee80211_node *ni) 234 { 235 struct ieee80211vap *vap = ni->ni_vap; 236 237 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 238 ni->ni_inact_reload = vap->iv_inact_auth; 239 if (ni->ni_inact > ni->ni_inact_reload) 240 ni->ni_inact = ni->ni_inact_reload; 241 242 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 243 "%s: inact_reload %u inact %u", __func__, 244 ni->ni_inact_reload, ni->ni_inact); 245 } 246 247 /* 248 * Fix tx parameters for a node according to ``association state''. 249 */ 250 void 251 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 252 { 253 struct ieee80211vap *vap = ni->ni_vap; 254 enum ieee80211_phymode mode; 255 256 if (ni->ni_flags & IEEE80211_NODE_VHT) { 257 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 258 mode = IEEE80211_MODE_VHT_5GHZ; 259 else 260 mode = IEEE80211_MODE_VHT_2GHZ; 261 } else if (ni->ni_flags & IEEE80211_NODE_HT) { 262 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 263 mode = IEEE80211_MODE_11NA; 264 else 265 mode = IEEE80211_MODE_11NG; 266 } else { /* legacy rate handling */ 267 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 268 mode = IEEE80211_MODE_STURBO_A; 269 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 270 mode = IEEE80211_MODE_HALF; 271 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 272 mode = IEEE80211_MODE_QUARTER; 273 /* NB: 108A should be handled as 11a */ 274 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 275 mode = IEEE80211_MODE_11A; 276 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 277 (ni->ni_flags & IEEE80211_NODE_ERP)) 278 mode = IEEE80211_MODE_11G; 279 else 280 mode = IEEE80211_MODE_11B; 281 } 282 ni->ni_txparms = &vap->iv_txparms[mode]; 283 } 284 285 /* 286 * Set/change the channel. The rate set is also updated as 287 * to insure a consistent view by drivers. 288 * XXX should be private but hostap needs it to deal with CSA 289 */ 290 void 291 ieee80211_node_set_chan(struct ieee80211_node *ni, 292 struct ieee80211_channel *chan) 293 { 294 struct ieee80211com *ic = ni->ni_ic; 295 struct ieee80211vap *vap = ni->ni_vap; 296 enum ieee80211_phymode mode; 297 298 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 299 300 ni->ni_chan = chan; 301 mode = ieee80211_chan2mode(chan); 302 if (IEEE80211_IS_CHAN_HT(chan)) { 303 /* 304 * We must install the legacy rate est in ni_rates and the 305 * HT rate set in ni_htrates. 306 */ 307 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 308 /* 309 * Setup bss tx parameters based on operating mode. We 310 * use legacy rates when operating in a mixed HT+non-HT bss 311 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 312 */ 313 if (mode == IEEE80211_MODE_11NA && 314 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 315 mode = IEEE80211_MODE_11A; 316 else if (mode == IEEE80211_MODE_11NG && 317 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 318 mode = IEEE80211_MODE_11G; 319 if (mode == IEEE80211_MODE_11G && 320 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 321 mode = IEEE80211_MODE_11B; 322 } 323 ni->ni_txparms = &vap->iv_txparms[mode]; 324 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 325 } 326 327 static __inline void 328 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 329 { 330 /* propagate useful state */ 331 nbss->ni_authmode = obss->ni_authmode; 332 nbss->ni_txpower = obss->ni_txpower; 333 nbss->ni_vlan = obss->ni_vlan; 334 /* XXX statistics? */ 335 /* XXX legacy WDS bssid? */ 336 } 337 338 void 339 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 340 { 341 struct ieee80211com *ic = vap->iv_ic; 342 struct ieee80211_node *ni; 343 344 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 345 "%s: creating %s on channel %u%c flags 0x%08x\n", __func__, 346 ieee80211_opmode_name[vap->iv_opmode], 347 ieee80211_chan2ieee(ic, chan), 348 ieee80211_channel_type_char(chan), 349 chan->ic_flags); 350 351 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 352 if (ni == NULL) { 353 /* XXX recovery? */ 354 return; 355 } 356 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 357 ni->ni_esslen = vap->iv_des_ssid[0].len; 358 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 359 if (vap->iv_bss != NULL) 360 copy_bss(ni, vap->iv_bss); 361 ni->ni_intval = ic->ic_bintval; 362 if (vap->iv_flags & IEEE80211_F_PRIVACY) 363 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 364 if (ic->ic_phytype == IEEE80211_T_FH) { 365 ni->ni_fhdwell = 200; /* XXX */ 366 ni->ni_fhindex = 1; 367 } 368 if (vap->iv_opmode == IEEE80211_M_IBSS) { 369 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 370 if (vap->iv_flags & IEEE80211_F_DESBSSID) 371 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 372 else { 373 net80211_get_random_bytes(ni->ni_bssid, 374 IEEE80211_ADDR_LEN); 375 /* clear group bit, add local bit */ 376 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 377 } 378 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 379 if (vap->iv_flags & IEEE80211_F_DESBSSID) 380 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 381 else 382 #ifdef IEEE80211_SUPPORT_TDMA 383 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 384 #endif 385 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 386 #ifdef IEEE80211_SUPPORT_MESH 387 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 388 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 389 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 390 #endif 391 } 392 /* 393 * Fix the channel and related attributes. 394 */ 395 /* clear DFS CAC state on previous channel */ 396 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 397 ic->ic_bsschan->ic_freq != chan->ic_freq && 398 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 399 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 400 ic->ic_bsschan = chan; 401 ieee80211_node_set_chan(ni, chan); 402 ic->ic_curmode = ieee80211_chan2mode(chan); 403 /* 404 * Do mode-specific setup. 405 */ 406 if (IEEE80211_IS_CHAN_FULL(chan)) { 407 if (IEEE80211_IS_CHAN_ANYG(chan)) { 408 /* 409 * Use a mixed 11b/11g basic rate set. 410 */ 411 ieee80211_setbasicrates(&ni->ni_rates, 412 IEEE80211_MODE_11G); 413 if (vap->iv_flags & IEEE80211_F_PUREG) { 414 /* 415 * Also mark OFDM rates basic so 11b 416 * stations do not join (WiFi compliance). 417 */ 418 ieee80211_addbasicrates(&ni->ni_rates, 419 IEEE80211_MODE_11A); 420 } 421 } else if (IEEE80211_IS_CHAN_B(chan)) { 422 /* 423 * Force pure 11b rate set. 424 */ 425 ieee80211_setbasicrates(&ni->ni_rates, 426 IEEE80211_MODE_11B); 427 } 428 } 429 430 /* XXX TODO: other bits and pieces - eg fast-frames? */ 431 432 /* If we're an 11n channel then initialise the 11n bits */ 433 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { 434 /* XXX what else? */ 435 ieee80211_ht_node_init(ni); 436 ieee80211_vht_node_init(ni); 437 } else if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 438 /* XXX what else? */ 439 ieee80211_ht_node_init(ni); 440 } 441 442 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 443 } 444 445 /* 446 * Reset bss state on transition to the INIT state. 447 * Clear any stations from the table (they have been 448 * deauth'd) and reset the bss node (clears key, rate 449 * etc. state). 450 */ 451 void 452 ieee80211_reset_bss(struct ieee80211vap *vap) 453 { 454 struct ieee80211com *ic = vap->iv_ic; 455 struct ieee80211_node *ni, *obss; 456 457 ieee80211_node_table_reset(&ic->ic_sta, vap); 458 /* XXX multi-bss: wrong */ 459 ieee80211_vap_reset_erp(vap); 460 461 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 462 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 463 obss = vap->iv_update_bss(vap, ieee80211_ref_node(ni)); 464 if (obss != NULL) { 465 copy_bss(ni, obss); 466 ni->ni_intval = ic->ic_bintval; 467 ieee80211_free_node(obss); 468 } else 469 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 470 } 471 472 static int 473 match_ssid(const struct ieee80211_node *ni, 474 int nssid, const struct ieee80211_scan_ssid ssids[]) 475 { 476 int i; 477 478 for (i = 0; i < nssid; i++) { 479 if (ni->ni_esslen == ssids[i].len && 480 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 481 return 1; 482 } 483 return 0; 484 } 485 486 /* 487 * Test a node for suitability/compatibility. 488 */ 489 static int 490 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 491 { 492 struct ieee80211com *ic = ni->ni_ic; 493 uint8_t rate; 494 495 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 496 return 0; 497 if (vap->iv_opmode == IEEE80211_M_IBSS) { 498 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 499 return 0; 500 } else { 501 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 502 return 0; 503 } 504 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 505 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 506 return 0; 507 } else { 508 /* XXX does this mean privacy is supported or required? */ 509 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 510 return 0; 511 } 512 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 513 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 514 if (rate & IEEE80211_RATE_BASIC) 515 return 0; 516 if (vap->iv_des_nssid != 0 && 517 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 518 return 0; 519 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 520 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 521 return 0; 522 return 1; 523 } 524 525 #ifdef IEEE80211_DEBUG 526 /* 527 * Display node suitability/compatibility. 528 */ 529 static void 530 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 531 { 532 struct ieee80211com *ic = ni->ni_ic; 533 uint8_t rate; 534 int fail; 535 536 fail = 0; 537 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 538 fail |= 0x01; 539 if (vap->iv_opmode == IEEE80211_M_IBSS) { 540 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 541 fail |= 0x02; 542 } else { 543 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 544 fail |= 0x02; 545 } 546 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 547 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 548 fail |= 0x04; 549 } else { 550 /* XXX does this mean privacy is supported or required? */ 551 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 552 fail |= 0x04; 553 } 554 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 555 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 556 if (rate & IEEE80211_RATE_BASIC) 557 fail |= 0x08; 558 if (vap->iv_des_nssid != 0 && 559 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 560 fail |= 0x10; 561 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 562 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 563 fail |= 0x20; 564 565 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 566 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 567 printf(" %3d%c", 568 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 569 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 570 fail & 0x08 ? '!' : ' '); 571 printf(" %4s%c", 572 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 573 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 574 "????", 575 fail & 0x02 ? '!' : ' '); 576 printf(" %3s%c ", 577 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 578 fail & 0x04 ? '!' : ' '); 579 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 580 printf("%s\n", fail & 0x10 ? "!" : ""); 581 } 582 #endif /* IEEE80211_DEBUG */ 583 584 int 585 ieee80211_ibss_merge_check(struct ieee80211_node *ni) 586 { 587 struct ieee80211vap *vap = ni->ni_vap; 588 589 if (ni == vap->iv_bss || 590 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 591 /* unchanged, nothing to do */ 592 return 0; 593 } 594 595 if (!check_bss(vap, ni)) { 596 /* capabilities mismatch */ 597 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 598 "%s: merge failed, capabilities mismatch\n", __func__); 599 #ifdef IEEE80211_DEBUG 600 if (ieee80211_msg_assoc(vap)) 601 check_bss_debug(vap, ni); 602 #endif 603 vap->iv_stats.is_ibss_capmismatch++; 604 return 0; 605 } 606 607 return 1; 608 } 609 610 /* 611 * Check if the given node should populate the node table. 612 * 613 * We need to be in "see all beacons for all ssids" mode in order 614 * to do IBSS merges, however this means we will populate nodes for 615 * /all/ IBSS SSIDs, versus just the one we care about. 616 * 617 * So this check ensures the node can actually belong to our IBSS 618 * configuration. For now it simply checks the SSID. 619 */ 620 int 621 ieee80211_ibss_node_check_new(struct ieee80211_node *ni, 622 const struct ieee80211_scanparams *scan) 623 { 624 struct ieee80211vap *vap = ni->ni_vap; 625 int i; 626 627 /* 628 * If we have no SSID and no scan SSID, return OK. 629 */ 630 if (vap->iv_des_nssid == 0 && scan->ssid == NULL) 631 goto ok; 632 633 /* 634 * If we have one of (SSID, scan SSID) then return error. 635 */ 636 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL)) 637 goto mismatch; 638 639 /* 640 * Double-check - we need scan SSID. 641 */ 642 if (scan->ssid == NULL) 643 goto mismatch; 644 645 /* 646 * Check if the scan SSID matches the SSID list for the VAP. 647 */ 648 for (i = 0; i < vap->iv_des_nssid; i++) { 649 /* Sanity length check */ 650 if (vap->iv_des_ssid[i].len != scan->ssid[1]) 651 continue; 652 653 /* Note: SSID in the scan entry is the IE format */ 654 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2, 655 vap->iv_des_ssid[i].len) == 0) 656 goto ok; 657 } 658 659 mismatch: 660 return (0); 661 ok: 662 return (1); 663 } 664 665 /* 666 * Handle 802.11 ad hoc network merge. The 667 * convention, set by the Wireless Ethernet Compatibility Alliance 668 * (WECA), is that an 802.11 station will change its BSSID to match 669 * the "oldest" 802.11 ad hoc network, on the same channel, that 670 * has the station's desired SSID. The "oldest" 802.11 network 671 * sends beacons with the greatest TSF timestamp. 672 * 673 * The caller is assumed to validate TSF's before attempting a merge. 674 * 675 * Return !0 if the BSSID changed, 0 otherwise. 676 */ 677 int 678 ieee80211_ibss_merge(struct ieee80211_node *ni) 679 { 680 #ifdef IEEE80211_DEBUG 681 struct ieee80211vap *vap = ni->ni_vap; 682 #endif 683 684 if (! ieee80211_ibss_merge_check(ni)) 685 return 0; 686 687 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 688 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 689 ether_sprintf(ni->ni_bssid), 690 vap->iv_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 691 vap->iv_flags&IEEE80211_F_SHSLOT ? "short" : "long", 692 vap->iv_flags&IEEE80211_F_USEPROT ? ", protection" : "" 693 ); 694 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 695 } 696 697 /* 698 * Calculate HT channel promotion flags for all vaps. 699 * This assumes ni_chan have been setup for each vap. 700 */ 701 static int 702 gethtadjustflags(struct ieee80211com *ic) 703 { 704 struct ieee80211vap *vap; 705 int flags; 706 707 flags = 0; 708 /* XXX locking */ 709 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 710 if (vap->iv_state < IEEE80211_S_RUN) 711 continue; 712 switch (vap->iv_opmode) { 713 case IEEE80211_M_WDS: 714 case IEEE80211_M_STA: 715 case IEEE80211_M_AHDEMO: 716 case IEEE80211_M_HOSTAP: 717 case IEEE80211_M_IBSS: 718 case IEEE80211_M_MBSS: 719 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 720 break; 721 default: 722 break; 723 } 724 } 725 return flags; 726 } 727 728 /* 729 * Calculate VHT channel promotion flags for all vaps. 730 * This assumes ni_chan have been setup for each vap. 731 */ 732 static int 733 getvhtadjustflags(struct ieee80211com *ic) 734 { 735 struct ieee80211vap *vap; 736 int flags; 737 738 flags = 0; 739 /* XXX locking */ 740 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 741 if (vap->iv_state < IEEE80211_S_RUN) 742 continue; 743 switch (vap->iv_opmode) { 744 case IEEE80211_M_WDS: 745 case IEEE80211_M_STA: 746 case IEEE80211_M_AHDEMO: 747 case IEEE80211_M_HOSTAP: 748 case IEEE80211_M_IBSS: 749 case IEEE80211_M_MBSS: 750 flags |= ieee80211_vhtchanflags(vap->iv_bss->ni_chan); 751 break; 752 default: 753 break; 754 } 755 } 756 return flags; 757 } 758 759 /* 760 * Check if the current channel needs to change based on whether 761 * any vap's are using HT20/HT40. This is used to sync the state 762 * of ic_curchan after a channel width change on a running vap. 763 * 764 * Same applies for VHT. 765 */ 766 void 767 ieee80211_sync_curchan(struct ieee80211com *ic) 768 { 769 struct ieee80211_channel *c; 770 771 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 772 c = ieee80211_vht_adjust_channel(ic, c, getvhtadjustflags(ic)); 773 774 if (c != ic->ic_curchan) { 775 ic->ic_curchan = c; 776 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 777 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 778 IEEE80211_UNLOCK(ic); 779 ic->ic_set_channel(ic); 780 ieee80211_radiotap_chan_change(ic); 781 IEEE80211_LOCK(ic); 782 } 783 } 784 785 /* 786 * Setup the current channel. The request channel may be 787 * promoted if other vap's are operating with HT20/HT40. 788 */ 789 void 790 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 791 { 792 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 793 int flags = gethtadjustflags(ic); 794 /* 795 * Check for channel promotion required to support the 796 * set of running vap's. This assumes we are called 797 * after ni_chan is setup for each vap. 798 */ 799 /* XXX VHT? */ 800 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 801 if (flags > ieee80211_htchanflags(c)) 802 c = ieee80211_ht_adjust_channel(ic, c, flags); 803 } 804 805 /* 806 * VHT promotion - this will at least promote to VHT20/40 807 * based on what HT has done; it may further promote the 808 * channel to VHT80 or above. 809 */ 810 if (ic->ic_vhtcaps != 0) { 811 int flags = getvhtadjustflags(ic); 812 if (flags > ieee80211_vhtchanflags(c)) 813 c = ieee80211_vht_adjust_channel(ic, c, flags); 814 } 815 816 ic->ic_bsschan = ic->ic_curchan = c; 817 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 818 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 819 } 820 821 /* 822 * Change the current channel. The channel change is guaranteed to have 823 * happened before the next state change. 824 */ 825 void 826 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 827 { 828 ieee80211_setupcurchan(ic, c); 829 ieee80211_runtask(ic, &ic->ic_chan_task); 830 } 831 832 void 833 ieee80211_update_chw(struct ieee80211com *ic) 834 { 835 836 ieee80211_setupcurchan(ic, ic->ic_curchan); 837 ieee80211_runtask(ic, &ic->ic_chw_task); 838 } 839 840 /* 841 * Join the specified IBSS/BSS network. The node is assumed to 842 * be passed in with a held reference. 843 */ 844 static int 845 ieee80211_sta_join1(struct ieee80211_node *selbs) 846 { 847 struct ieee80211vap *vap = selbs->ni_vap; 848 struct ieee80211com *ic = selbs->ni_ic; 849 struct ieee80211_node *obss; 850 int canreassoc; 851 852 /* 853 * Committed to selbs, setup state. 854 */ 855 obss = vap->iv_update_bss(vap, selbs); /* NB: caller assumed to bump refcnt */ 856 /* 857 * Check if old+new node have the same address in which 858 * case we can reassociate when operating in sta mode. 859 */ 860 /* XXX We'll not be in RUN anymore as iv_state got updated already? */ 861 canreassoc = (obss != NULL && 862 vap->iv_state == IEEE80211_S_RUN && 863 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 864 if (obss != NULL) { 865 struct ieee80211_node_table *nt = obss->ni_table; 866 867 copy_bss(selbs, obss); 868 ieee80211_node_decref(obss); /* iv_bss reference */ 869 870 IEEE80211_NODE_LOCK(nt); 871 node_reclaim(nt, obss); /* station table reference */ 872 IEEE80211_NODE_UNLOCK(nt); 873 874 obss = NULL; /* NB: guard against later use */ 875 } 876 877 /* 878 * Delete unusable rates; we've already checked 879 * that the negotiated rate set is acceptable. 880 */ 881 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 882 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 883 884 ieee80211_setcurchan(ic, selbs->ni_chan); 885 /* 886 * Set the erp state (mostly the slot time) to deal with 887 * the auto-select case; this should be redundant if the 888 * mode is locked. 889 */ 890 ieee80211_vap_reset_erp(vap); 891 ieee80211_wme_initparams(vap); 892 893 if (vap->iv_opmode == IEEE80211_M_STA) { 894 if (canreassoc) { 895 /* Reassociate */ 896 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 897 } else { 898 /* 899 * Act as if we received a DEAUTH frame in case we 900 * are invoked from the RUN state. This will cause 901 * us to try to re-authenticate if we are operating 902 * as a station. 903 */ 904 IEEE80211_DPRINTF(vap, IEEE80211_MSG_AUTH, 905 "%s %p<%s> %s -> AUTH, FC0_SUBTYPE_DEAUTH\n", 906 __func__, selbs, ether_sprintf(selbs->ni_macaddr), 907 ieee80211_state_name[vap->iv_state]); 908 ieee80211_new_state(vap, IEEE80211_S_AUTH, 909 IEEE80211_FC0_SUBTYPE_DEAUTH); 910 } 911 } else 912 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 913 return 1; 914 } 915 916 int 917 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 918 const struct ieee80211_scan_entry *se) 919 { 920 struct ieee80211com *ic = vap->iv_ic; 921 struct ieee80211_node *ni; 922 int do_ht = 0; 923 924 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 925 if (ni == NULL) { 926 /* XXX msg */ 927 return 0; 928 } 929 930 /* 931 * Expand scan state into node's format. 932 * XXX may not need all this stuff 933 */ 934 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 935 ni->ni_esslen = se->se_ssid[1]; 936 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 937 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 938 ni->ni_intval = se->se_intval; 939 ni->ni_capinfo = se->se_capinfo; 940 ni->ni_chan = chan; 941 ni->ni_timoff = se->se_timoff; 942 ni->ni_fhdwell = se->se_fhdwell; 943 ni->ni_fhindex = se->se_fhindex; 944 ni->ni_erp = se->se_erp; 945 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 946 ni->ni_noise = se->se_noise; 947 if (vap->iv_opmode == IEEE80211_M_STA) { 948 /* NB: only infrastructure mode requires an associd */ 949 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 950 } 951 952 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 953 ieee80211_ies_expand(&ni->ni_ies); 954 #ifdef IEEE80211_SUPPORT_SUPERG 955 if (ni->ni_ies.ath_ie != NULL) 956 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 957 #endif 958 if (ni->ni_ies.htcap_ie != NULL) 959 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 960 if (ni->ni_ies.htinfo_ie != NULL) 961 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 962 #ifdef IEEE80211_SUPPORT_MESH 963 if (ni->ni_ies.meshid_ie != NULL) 964 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 965 #endif 966 #ifdef IEEE80211_SUPPORT_TDMA 967 if (ni->ni_ies.tdma_ie != NULL) 968 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 969 #endif 970 if (ni->ni_ies.vhtcap_ie != NULL) 971 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 972 if (ni->ni_ies.vhtopmode_ie != NULL) 973 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 974 975 /* XXX parse BSSLOAD IE */ 976 /* XXX parse TXPWRENV IE */ 977 /* XXX parse APCHANREP IE */ 978 } 979 980 vap->iv_dtim_period = se->se_dtimperiod; 981 vap->iv_dtim_count = 0; 982 983 /* NB: must be after ni_chan is setup */ 984 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 985 IEEE80211_F_DOSORT); 986 if (ieee80211_iserp_rateset(&ni->ni_rates)) 987 ni->ni_flags |= IEEE80211_NODE_ERP; 988 989 /* 990 * Setup HT state for this node if it's available, otherwise 991 * non-STA modes won't pick this state up. 992 * 993 * For IBSS and related modes that don't go through an 994 * association request/response, the only appropriate place 995 * to setup the HT state is here. 996 */ 997 if (ni->ni_ies.htinfo_ie != NULL && 998 ni->ni_ies.htcap_ie != NULL && 999 vap->iv_flags_ht & IEEE80211_FHT_HT) { 1000 ieee80211_ht_node_init(ni); 1001 ieee80211_ht_updateparams(ni, 1002 ni->ni_ies.htcap_ie, 1003 ni->ni_ies.htinfo_ie); 1004 do_ht = 1; 1005 } 1006 1007 /* 1008 * Setup VHT state for this node if it's available. 1009 * Same as the above. 1010 * 1011 * For now, don't allow 2GHz VHT operation. 1012 */ 1013 if (ni->ni_ies.vhtopmode_ie != NULL && 1014 ni->ni_ies.vhtcap_ie != NULL && 1015 vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1016 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1017 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1018 __func__, 1019 ni->ni_macaddr, 1020 ":"); 1021 } else { 1022 ieee80211_vht_node_init(ni); 1023 ieee80211_vht_updateparams(ni, 1024 ni->ni_ies.vhtcap_ie, 1025 ni->ni_ies.vhtopmode_ie); 1026 ieee80211_setup_vht_rates(ni, ni->ni_ies.vhtcap_ie, 1027 ni->ni_ies.vhtopmode_ie); 1028 do_ht = 1; 1029 } 1030 } 1031 1032 /* Finally do the node channel change */ 1033 if (do_ht) { 1034 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1035 ni->ni_ies.htinfo_ie); 1036 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 1037 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1038 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 1039 } 1040 1041 /* XXX else check for ath FF? */ 1042 /* XXX QoS? Difficult given that WME config is specific to a master */ 1043 1044 ieee80211_node_setuptxparms(ni); 1045 ieee80211_ratectl_node_init(ni); 1046 1047 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 1048 } 1049 1050 /* 1051 * Leave the specified IBSS/BSS network. The node is assumed to 1052 * be passed in with a held reference. 1053 */ 1054 void 1055 ieee80211_sta_leave(struct ieee80211_node *ni) 1056 { 1057 struct ieee80211com *ic = ni->ni_ic; 1058 1059 ic->ic_node_cleanup(ni); 1060 ieee80211_notify_node_leave(ni); 1061 } 1062 1063 /* 1064 * Send a deauthenticate frame and drop the station. 1065 */ 1066 void 1067 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 1068 { 1069 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 1070 ieee80211_ref_node(ni); 1071 if (ni->ni_associd != 0) 1072 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 1073 ieee80211_node_leave(ni); 1074 ieee80211_free_node(ni); 1075 } 1076 1077 static struct ieee80211_node * 1078 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1079 { 1080 struct ieee80211_node *ni; 1081 1082 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), 1083 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1084 return ni; 1085 } 1086 1087 static int 1088 node_init(struct ieee80211_node *ni) 1089 { 1090 return 0; 1091 } 1092 1093 /* 1094 * Initialize an ie blob with the specified data. If previous 1095 * data exists re-use the data block. As a side effect we clear 1096 * all references to specific ie's; the caller is required to 1097 * recalculate them. 1098 */ 1099 int 1100 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 1101 { 1102 /* NB: assumes data+len are the last fields */ 1103 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 1104 if (ies->data != NULL && ies->len != len) { 1105 /* data size changed */ 1106 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1107 ies->data = NULL; 1108 } 1109 if (ies->data == NULL) { 1110 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 1111 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1112 if (ies->data == NULL) { 1113 ies->len = 0; 1114 /* NB: pointers have already been zero'd above */ 1115 return 0; 1116 } 1117 } 1118 memcpy(ies->data, data, len); 1119 ies->len = len; 1120 return 1; 1121 } 1122 1123 /* 1124 * Reclaim storage for an ie blob. 1125 */ 1126 void 1127 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 1128 { 1129 if (ies->data != NULL) 1130 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1131 } 1132 1133 /* 1134 * Expand an ie blob data contents and to fillin individual 1135 * ie pointers. The data blob is assumed to be well-formed; 1136 * we don't do any validity checking of ie lengths. 1137 */ 1138 void 1139 ieee80211_ies_expand(struct ieee80211_ies *ies) 1140 { 1141 uint8_t *ie; 1142 int ielen; 1143 1144 ie = ies->data; 1145 ielen = ies->len; 1146 while (ielen > 1) { 1147 /* Make sure the given IE length fits into the total length. */ 1148 if ((2 + ie[1]) > ielen) { 1149 printf("%s: malformed IEs! ies %p { data %p len %d }: " 1150 "ie %u len 2+%u > total len left %d\n", 1151 __func__, ies, ies->data, ies->len, 1152 ie[0], ie[1], ielen); 1153 return; 1154 } 1155 switch (ie[0]) { 1156 case IEEE80211_ELEMID_VENDOR: 1157 if (iswpaoui(ie)) 1158 ies->wpa_ie = ie; 1159 else if (iswmeoui(ie)) 1160 ies->wme_ie = ie; 1161 #ifdef IEEE80211_SUPPORT_SUPERG 1162 else if (isatherosoui(ie)) 1163 ies->ath_ie = ie; 1164 #endif 1165 #ifdef IEEE80211_SUPPORT_TDMA 1166 else if (istdmaoui(ie)) 1167 ies->tdma_ie = ie; 1168 #endif 1169 break; 1170 case IEEE80211_ELEMID_RSN: 1171 ies->rsn_ie = ie; 1172 break; 1173 case IEEE80211_ELEMID_HTCAP: 1174 ies->htcap_ie = ie; 1175 break; 1176 case IEEE80211_ELEMID_HTINFO: 1177 ies->htinfo_ie = ie; 1178 break; 1179 #ifdef IEEE80211_SUPPORT_MESH 1180 case IEEE80211_ELEMID_MESHID: 1181 ies->meshid_ie = ie; 1182 break; 1183 #endif 1184 case IEEE80211_ELEMID_VHT_CAP: 1185 ies->vhtcap_ie = ie; 1186 break; 1187 case IEEE80211_ELEMID_VHT_OPMODE: 1188 ies->vhtopmode_ie = ie; 1189 break; 1190 case IEEE80211_ELEMID_VHT_PWR_ENV: 1191 ies->vhtpwrenv_ie = ie; 1192 break; 1193 case IEEE80211_ELEMID_BSSLOAD: 1194 ies->bssload_ie = ie; 1195 break; 1196 case IEEE80211_ELEMID_APCHANREP: 1197 ies->apchanrep_ie = ie; 1198 break; 1199 } 1200 ielen -= 2 + ie[1]; 1201 ie += 2 + ie[1]; 1202 } 1203 } 1204 1205 /* 1206 * Reclaim any resources in a node and reset any critical 1207 * state. Typically nodes are free'd immediately after, 1208 * but in some cases the storage may be reused so we need 1209 * to insure consistent state (should probably fix that). 1210 */ 1211 static void 1212 node_cleanup(struct ieee80211_node *ni) 1213 { 1214 struct ieee80211vap *vap = ni->ni_vap; 1215 struct ieee80211com *ic = ni->ni_ic; 1216 int i; 1217 1218 /* NB: preserve ni_table */ 1219 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1220 if (vap->iv_opmode != IEEE80211_M_STA) 1221 vap->iv_ps_sta--; 1222 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1223 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1224 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1225 } 1226 /* 1227 * Cleanup any VHT and HT-related state. 1228 */ 1229 if (ni->ni_flags & IEEE80211_NODE_VHT) 1230 ieee80211_vht_node_cleanup(ni); 1231 if (ni->ni_flags & IEEE80211_NODE_HT) 1232 ieee80211_ht_node_cleanup(ni); 1233 #ifdef IEEE80211_SUPPORT_SUPERG 1234 /* Always do FF node cleanup; for A-MSDU */ 1235 ieee80211_ff_node_cleanup(ni); 1236 #endif 1237 #ifdef IEEE80211_SUPPORT_MESH 1238 /* 1239 * Cleanup any mesh-related state. 1240 */ 1241 if (vap->iv_opmode == IEEE80211_M_MBSS) 1242 ieee80211_mesh_node_cleanup(ni); 1243 #endif 1244 /* 1245 * Clear any staging queue entries. 1246 */ 1247 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1248 1249 /* 1250 * Clear AREF flag that marks the authorization refcnt bump 1251 * has happened. This is probably not needed as the node 1252 * should always be removed from the table so not found but 1253 * do it just in case. 1254 * Likewise clear the ASSOCID flag as these flags are intended 1255 * to be managed in tandem. 1256 */ 1257 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1258 1259 /* 1260 * Drain power save queue and, if needed, clear TIM. 1261 */ 1262 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1263 vap->iv_set_tim(ni, 0); 1264 1265 ni->ni_associd = 0; 1266 if (ni->ni_challenge != NULL) { 1267 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1268 ni->ni_challenge = NULL; 1269 } 1270 /* 1271 * Preserve SSID, WPA, and WME ie's so the bss node is 1272 * reusable during a re-auth/re-assoc state transition. 1273 * If we remove these data they will not be recreated 1274 * because they come from a probe-response or beacon frame 1275 * which cannot be expected prior to the association-response. 1276 * This should not be an issue when operating in other modes 1277 * as stations leaving always go through a full state transition 1278 * which will rebuild this state. 1279 * 1280 * XXX does this leave us open to inheriting old state? 1281 */ 1282 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1283 if (ni->ni_rxfrag[i] != NULL) { 1284 m_freem(ni->ni_rxfrag[i]); 1285 ni->ni_rxfrag[i] = NULL; 1286 } 1287 /* 1288 * Must be careful here to remove any key map entry w/o a LOR. 1289 */ 1290 ieee80211_node_delucastkey(ni); 1291 } 1292 1293 static void 1294 node_free(struct ieee80211_node *ni) 1295 { 1296 struct ieee80211com *ic = ni->ni_ic; 1297 1298 ieee80211_ratectl_node_deinit(ni); 1299 ic->ic_node_cleanup(ni); 1300 ieee80211_ies_cleanup(&ni->ni_ies); 1301 ieee80211_psq_cleanup(&ni->ni_psq); 1302 IEEE80211_FREE(ni, M_80211_NODE); 1303 } 1304 1305 static void 1306 node_age(struct ieee80211_node *ni) 1307 { 1308 struct ieee80211vap *vap = ni->ni_vap; 1309 1310 /* 1311 * Age frames on the power save queue. 1312 */ 1313 if (ieee80211_node_psq_age(ni) != 0 && 1314 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1315 vap->iv_set_tim(ni, 0); 1316 /* 1317 * Age out HT resources (e.g. frames on the 1318 * A-MPDU reorder queues). 1319 */ 1320 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1321 ieee80211_ht_node_age(ni); 1322 } 1323 1324 static int8_t 1325 node_getrssi(const struct ieee80211_node *ni) 1326 { 1327 uint32_t avgrssi = ni->ni_avgrssi; 1328 int32_t rssi; 1329 1330 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1331 return 0; 1332 rssi = IEEE80211_RSSI_GET(avgrssi); 1333 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1334 } 1335 1336 static void 1337 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1338 { 1339 *rssi = node_getrssi(ni); 1340 *noise = ni->ni_noise; 1341 } 1342 1343 static void 1344 node_getmimoinfo(const struct ieee80211_node *ni, 1345 struct ieee80211_mimo_info *info) 1346 { 1347 int i; 1348 uint32_t avgrssi; 1349 int32_t rssi; 1350 1351 bzero(info, sizeof(*info)); 1352 1353 for (i = 0; i < MIN(IEEE80211_MAX_CHAINS, ni->ni_mimo_chains); i++) { 1354 /* Note: for now, just pri20 channel info */ 1355 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1356 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1357 info->ch[i].rssi[0] = 0; 1358 } else { 1359 rssi = IEEE80211_RSSI_GET(avgrssi); 1360 info->ch[i].rssi[0] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1361 } 1362 info->ch[i].noise[0] = ni->ni_mimo_noise_ctl[i]; 1363 } 1364 1365 /* XXX ext radios? */ 1366 1367 /* XXX EVM? */ 1368 } 1369 1370 static void 1371 ieee80211_add_node_nt(struct ieee80211_node_table *nt, 1372 struct ieee80211_node *ni) 1373 { 1374 struct ieee80211com *ic = nt->nt_ic; 1375 int hash; 1376 1377 IEEE80211_NODE_LOCK_ASSERT(nt); 1378 1379 hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr); 1380 (void) ic; /* XXX IEEE80211_NODE_HASH */ 1381 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1382 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1383 nt->nt_count++; 1384 ni->ni_table = nt; 1385 } 1386 1387 static void 1388 ieee80211_del_node_nt(struct ieee80211_node_table *nt, 1389 struct ieee80211_node *ni) 1390 { 1391 1392 IEEE80211_NODE_LOCK_ASSERT(nt); 1393 1394 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1395 LIST_REMOVE(ni, ni_hash); 1396 nt->nt_count--; 1397 KASSERT(nt->nt_count >= 0, 1398 ("nt_count is negative (%d)!\n", nt->nt_count)); 1399 ni->ni_table = NULL; 1400 } 1401 1402 static struct ieee80211_node * 1403 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1404 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1405 { 1406 struct ieee80211com *ic = nt->nt_ic; 1407 struct ieee80211_node *ni; 1408 1409 ni = ic->ic_node_alloc(vap, macaddr); 1410 if (ni == NULL) { 1411 vap->iv_stats.is_rx_nodealloc++; 1412 return NULL; 1413 } 1414 1415 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1416 "%s %p<%s> in %s table\n", __func__, ni, 1417 ether_sprintf(macaddr), nt->nt_name); 1418 1419 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1420 ieee80211_node_initref(ni); /* mark referenced */ 1421 ni->ni_chan = IEEE80211_CHAN_ANYC; 1422 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1423 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1424 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1425 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1426 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1427 ni->ni_inact_reload = nt->nt_inact_init; 1428 ni->ni_inact = ni->ni_inact_reload; 1429 ni->ni_ath_defkeyix = 0x7fff; 1430 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1431 #ifdef IEEE80211_SUPPORT_MESH 1432 if (vap->iv_opmode == IEEE80211_M_MBSS) 1433 ieee80211_mesh_node_init(vap, ni); 1434 #endif 1435 IEEE80211_NODE_LOCK(nt); 1436 ieee80211_add_node_nt(nt, ni); 1437 ni->ni_vap = vap; 1438 ni->ni_ic = ic; 1439 IEEE80211_NODE_UNLOCK(nt); 1440 1441 /* handle failure; free node state */ 1442 if (ic->ic_node_init(ni) != 0) { 1443 vap->iv_stats.is_rx_nodealloc++; 1444 ieee80211_psq_cleanup(&ni->ni_psq); 1445 ieee80211_ratectl_node_deinit(ni); 1446 __ieee80211_free_node(ni); 1447 return NULL; 1448 } 1449 1450 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1451 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1452 1453 return ni; 1454 } 1455 1456 /* 1457 * Craft a temporary node suitable for sending a management frame 1458 * to the specified station. We craft only as much state as we 1459 * need to do the work since the node will be immediately reclaimed 1460 * once the send completes. 1461 */ 1462 struct ieee80211_node * 1463 ieee80211_tmp_node(struct ieee80211vap *vap, 1464 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1465 { 1466 struct ieee80211com *ic = vap->iv_ic; 1467 struct ieee80211_node *ni; 1468 1469 ni = ic->ic_node_alloc(vap, macaddr); 1470 if (ni != NULL) { 1471 struct ieee80211_node *bss = vap->iv_bss; 1472 1473 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1474 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1475 1476 ni->ni_table = NULL; /* NB: pedantic */ 1477 ni->ni_ic = ic; /* NB: needed to set channel */ 1478 ni->ni_vap = vap; 1479 1480 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1481 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1482 ieee80211_node_initref(ni); /* mark referenced */ 1483 /* NB: required by ieee80211_fix_rate */ 1484 ieee80211_node_set_chan(ni, bss->ni_chan); 1485 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1486 IEEE80211_KEYIX_NONE); 1487 ni->ni_txpower = bss->ni_txpower; 1488 /* XXX optimize away */ 1489 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1490 1491 ieee80211_ratectl_node_init(ni); 1492 1493 /* handle failure; free node state */ 1494 if (ic->ic_node_init(ni) != 0) { 1495 vap->iv_stats.is_rx_nodealloc++; 1496 ieee80211_psq_cleanup(&ni->ni_psq); 1497 ieee80211_ratectl_node_deinit(ni); 1498 __ieee80211_free_node(ni); 1499 return NULL; 1500 } 1501 1502 } else { 1503 /* XXX msg */ 1504 vap->iv_stats.is_rx_nodealloc++; 1505 } 1506 return ni; 1507 } 1508 1509 struct ieee80211_node * 1510 ieee80211_dup_bss(struct ieee80211vap *vap, 1511 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1512 { 1513 struct ieee80211com *ic = vap->iv_ic; 1514 struct ieee80211_node *ni; 1515 1516 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1517 if (ni != NULL) { 1518 struct ieee80211_node *bss = vap->iv_bss; 1519 /* 1520 * Inherit from iv_bss. 1521 */ 1522 copy_bss(ni, bss); 1523 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1524 ieee80211_node_set_chan(ni, bss->ni_chan); 1525 } 1526 return ni; 1527 } 1528 1529 /* 1530 * Create a bss node for a legacy WDS vap. The far end does 1531 * not associate so we just create create a new node and 1532 * simulate an association. The caller is responsible for 1533 * installing the node as the bss node and handling any further 1534 * setup work like authorizing the port. 1535 */ 1536 struct ieee80211_node * 1537 ieee80211_node_create_wds(struct ieee80211vap *vap, 1538 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1539 { 1540 struct ieee80211com *ic = vap->iv_ic; 1541 struct ieee80211_node *ni; 1542 1543 /* XXX check if node already in sta table? */ 1544 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1545 if (ni != NULL) { 1546 ni->ni_wdsvap = vap; 1547 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1548 /* 1549 * Inherit any manually configured settings. 1550 */ 1551 copy_bss(ni, vap->iv_bss); 1552 ieee80211_node_set_chan(ni, chan); 1553 /* NB: propagate ssid so available to WPA supplicant */ 1554 ni->ni_esslen = vap->iv_des_ssid[0].len; 1555 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1556 /* NB: no associd for peer */ 1557 /* 1558 * There are no management frames to use to 1559 * discover neighbor capabilities, so blindly 1560 * propagate the local configuration. 1561 */ 1562 if (vap->iv_flags & IEEE80211_F_WME) 1563 ni->ni_flags |= IEEE80211_NODE_QOS; 1564 #ifdef IEEE80211_SUPPORT_SUPERG 1565 if (vap->iv_flags & IEEE80211_F_FF) 1566 ni->ni_flags |= IEEE80211_NODE_FF; 1567 #endif 1568 /* XXX VHT */ 1569 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1570 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1571 /* 1572 * Device is HT-capable and HT is enabled for 1573 * the vap; setup HT operation. On return 1574 * ni_chan will be adjusted to an HT channel. 1575 */ 1576 ieee80211_ht_wds_init(ni); 1577 if (vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1578 printf("%s: TODO: vht_wds_init\n", __func__); 1579 } 1580 } else { 1581 struct ieee80211_channel *c = ni->ni_chan; 1582 /* 1583 * Force a legacy channel to be used. 1584 */ 1585 c = ieee80211_find_channel(ic, 1586 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1587 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1588 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1589 ni->ni_chan = c; 1590 } 1591 } 1592 return ni; 1593 } 1594 1595 struct ieee80211_node * 1596 _ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1597 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1598 const char *func __debrefcnt_used, int line __debrefcnt_used) 1599 { 1600 struct ieee80211_node *ni; 1601 int hash; 1602 1603 IEEE80211_NODE_LOCK_ASSERT(nt); 1604 1605 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1606 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1607 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1608 ieee80211_ref_node(ni); /* mark referenced */ 1609 #ifdef IEEE80211_DEBUG_REFCNT 1610 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1611 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1612 func, line, 1613 ni, ether_sprintf(ni->ni_macaddr), 1614 ieee80211_node_refcnt(ni)); 1615 #endif 1616 return ni; 1617 } 1618 } 1619 return NULL; 1620 } 1621 1622 struct ieee80211_node * 1623 _ieee80211_find_node(struct ieee80211_node_table *nt, 1624 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1625 const char *func __debrefcnt_used, int line __debrefcnt_used) 1626 { 1627 struct ieee80211_node *ni; 1628 1629 IEEE80211_NODE_LOCK(nt); 1630 ni = _ieee80211_find_node_locked(nt, macaddr, func, line); 1631 IEEE80211_NODE_UNLOCK(nt); 1632 return ni; 1633 } 1634 1635 struct ieee80211_node * 1636 _ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1637 const struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN], 1638 const char *func __debrefcnt_used, int line __debrefcnt_used) 1639 { 1640 struct ieee80211_node *ni; 1641 int hash; 1642 1643 IEEE80211_NODE_LOCK_ASSERT(nt); 1644 1645 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1646 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1647 if (ni->ni_vap == vap && 1648 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1649 ieee80211_ref_node(ni); /* mark referenced */ 1650 #ifdef IEEE80211_DEBUG_REFCNT 1651 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1652 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1653 func, line, 1654 ni, ether_sprintf(ni->ni_macaddr), 1655 ieee80211_node_refcnt(ni)); 1656 #endif 1657 return ni; 1658 } 1659 } 1660 return NULL; 1661 } 1662 1663 struct ieee80211_node * 1664 _ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1665 const struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN], 1666 const char *func __debrefcnt_used, int line __debrefcnt_used) 1667 { 1668 struct ieee80211_node *ni; 1669 1670 IEEE80211_NODE_LOCK(nt); 1671 ni = _ieee80211_find_vap_node_locked(nt, vap, macaddr, func, line); 1672 IEEE80211_NODE_UNLOCK(nt); 1673 return ni; 1674 } 1675 1676 /* 1677 * Fake up a node; this handles node discovery in adhoc mode. 1678 * Note that for the driver's benefit we treat this like 1679 * an association so the driver has an opportunity to setup 1680 * it's private state. 1681 */ 1682 struct ieee80211_node * 1683 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1684 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1685 { 1686 struct ieee80211_node *ni; 1687 1688 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1689 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1690 ni = ieee80211_dup_bss(vap, macaddr); 1691 if (ni != NULL) { 1692 struct ieee80211com *ic = vap->iv_ic; 1693 1694 /* XXX no rate negotiation; just dup */ 1695 ni->ni_rates = vap->iv_bss->ni_rates; 1696 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1697 ni->ni_flags |= IEEE80211_NODE_ERP; 1698 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1699 /* 1700 * In adhoc demo mode there are no management 1701 * frames to use to discover neighbor capabilities, 1702 * so blindly propagate the local configuration 1703 * so we can do interesting things (e.g. use 1704 * WME to disable ACK's). 1705 */ 1706 /* 1707 * XXX TODO: 11n? 1708 */ 1709 if (vap->iv_flags & IEEE80211_F_WME) 1710 ni->ni_flags |= IEEE80211_NODE_QOS; 1711 #ifdef IEEE80211_SUPPORT_SUPERG 1712 if (vap->iv_flags & IEEE80211_F_FF) 1713 ni->ni_flags |= IEEE80211_NODE_FF; 1714 #endif 1715 } 1716 ieee80211_node_setuptxparms(ni); 1717 ieee80211_ratectl_node_init(ni); 1718 1719 /* 1720 * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX, 1721 * not A-MPDU TX; not 11n rates, etc. We'll cycle 1722 * that after we hear that we can indeed do 11n 1723 * (either by a beacon frame or by a probe response.) 1724 */ 1725 1726 /* 1727 * This is the first time we see the node. 1728 */ 1729 if (ic->ic_newassoc != NULL) 1730 ic->ic_newassoc(ni, 1); 1731 1732 /* 1733 * Kick off a probe request to the given node; 1734 * we will then use the probe response to update 1735 * 11n/etc configuration state. 1736 * 1737 * XXX TODO: this isn't guaranteed, and until we get 1738 * a probe response, we won't be able to actually 1739 * do anything 802.11n related to the node. 1740 * So if this does indeed work, maybe we should hold 1741 * off on sending responses until we get the probe 1742 * response, or just default to some sensible subset 1743 * of 802.11n behaviour (eg always allow aggregation 1744 * negotiation TO us, but not FROM us, etc) so we 1745 * aren't entirely busted. 1746 */ 1747 if (vap->iv_opmode == IEEE80211_M_IBSS) { 1748 ieee80211_send_probereq(ni, /* node */ 1749 vap->iv_myaddr, /* SA */ 1750 ni->ni_macaddr, /* DA */ 1751 vap->iv_bss->ni_bssid, /* BSSID */ 1752 vap->iv_bss->ni_essid, 1753 vap->iv_bss->ni_esslen); /* SSID */ 1754 } 1755 1756 /* XXX not right for 802.1x/WPA */ 1757 ieee80211_node_authorize(ni); 1758 } 1759 return ni; 1760 } 1761 1762 void 1763 ieee80211_init_neighbor(struct ieee80211_node *ni, 1764 const struct ieee80211_frame *wh, 1765 const struct ieee80211_scanparams *sp) 1766 { 1767 int do_ht_setup = 0, do_vht_setup = 0; 1768 1769 ni->ni_esslen = sp->ssid[1]; 1770 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1771 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1772 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1773 ni->ni_intval = sp->bintval; 1774 ni->ni_capinfo = sp->capinfo; 1775 ni->ni_chan = ni->ni_ic->ic_curchan; 1776 ni->ni_fhdwell = sp->fhdwell; 1777 ni->ni_fhindex = sp->fhindex; 1778 ni->ni_erp = sp->erp; 1779 ni->ni_timoff = sp->timoff; 1780 #ifdef IEEE80211_SUPPORT_MESH 1781 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1782 ieee80211_mesh_init_neighbor(ni, wh, sp); 1783 #endif 1784 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1785 ieee80211_ies_expand(&ni->ni_ies); 1786 if (ni->ni_ies.wme_ie != NULL) 1787 ni->ni_flags |= IEEE80211_NODE_QOS; 1788 else 1789 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1790 #ifdef IEEE80211_SUPPORT_SUPERG 1791 if (ni->ni_ies.ath_ie != NULL) 1792 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1793 #endif 1794 if (ni->ni_ies.htcap_ie != NULL) 1795 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1796 if (ni->ni_ies.htinfo_ie != NULL) 1797 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1798 1799 if (ni->ni_ies.vhtcap_ie != NULL) 1800 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 1801 if (ni->ni_ies.vhtopmode_ie != NULL) 1802 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 1803 1804 if ((ni->ni_ies.htcap_ie != NULL) && 1805 (ni->ni_ies.htinfo_ie != NULL) && 1806 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1807 do_ht_setup = 1; 1808 } 1809 1810 if ((ni->ni_ies.vhtcap_ie != NULL) && 1811 (ni->ni_ies.vhtopmode_ie != NULL) && 1812 (ni->ni_vap->iv_flags_vht & IEEE80211_FVHT_VHT)) { 1813 do_vht_setup = 1; 1814 } 1815 } 1816 1817 /* NB: must be after ni_chan is setup */ 1818 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1819 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1820 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1821 1822 /* 1823 * If the neighbor is HT compatible, flip that on. 1824 */ 1825 if (do_ht_setup) { 1826 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1827 "%s: doing HT setup\n", __func__); 1828 ieee80211_ht_node_init(ni); 1829 ieee80211_ht_updateparams(ni, 1830 ni->ni_ies.htcap_ie, 1831 ni->ni_ies.htinfo_ie); 1832 1833 if (do_vht_setup) { 1834 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1835 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1836 __func__, 1837 ni->ni_macaddr, 1838 ":"); 1839 } else { 1840 ieee80211_vht_node_init(ni); 1841 ieee80211_vht_updateparams(ni, 1842 ni->ni_ies.vhtcap_ie, 1843 ni->ni_ies.vhtopmode_ie); 1844 ieee80211_setup_vht_rates(ni, 1845 ni->ni_ies.vhtcap_ie, 1846 ni->ni_ies.vhtopmode_ie); 1847 } 1848 } 1849 1850 /* 1851 * Finally do the channel upgrade/change based 1852 * on the HT/VHT configuration. 1853 */ 1854 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1855 ni->ni_ies.htinfo_ie); 1856 ieee80211_setup_htrates(ni, 1857 ni->ni_ies.htcap_ie, 1858 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1859 ieee80211_setup_basic_htrates(ni, 1860 ni->ni_ies.htinfo_ie); 1861 1862 ieee80211_node_setuptxparms(ni); 1863 ieee80211_ratectl_node_init(ni); 1864 1865 /* Reassociate; we're now 11n/11ac */ 1866 /* 1867 * XXX TODO: this is the wrong thing to do - 1868 * we're calling it with isnew=1 so the ath(4) 1869 * driver reinitialises the rate tables. 1870 * This "mostly" works for ath(4), but it won't 1871 * be right for firmware devices which allocate 1872 * node states. 1873 * 1874 * So, do we just create a new node and delete 1875 * the old one? Or? 1876 */ 1877 if (ni->ni_ic->ic_newassoc) 1878 ni->ni_ic->ic_newassoc(ni, 1); 1879 } 1880 } 1881 1882 /* 1883 * Do node discovery in adhoc mode on receipt of a beacon 1884 * or probe response frame. Note that for the driver's 1885 * benefit we treat this like an association so the 1886 * driver has an opportunity to setup it's private state. 1887 */ 1888 struct ieee80211_node * 1889 ieee80211_add_neighbor(struct ieee80211vap *vap, 1890 const struct ieee80211_frame *wh, 1891 const struct ieee80211_scanparams *sp) 1892 { 1893 struct ieee80211_node *ni; 1894 1895 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1896 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1897 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1898 if (ni != NULL) { 1899 struct ieee80211com *ic = vap->iv_ic; 1900 1901 ieee80211_init_neighbor(ni, wh, sp); 1902 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1903 ni->ni_flags |= IEEE80211_NODE_ERP; 1904 ieee80211_node_setuptxparms(ni); 1905 ieee80211_ratectl_node_init(ni); 1906 if (ic->ic_newassoc != NULL) 1907 ic->ic_newassoc(ni, 1); 1908 /* XXX not right for 802.1x/WPA */ 1909 ieee80211_node_authorize(ni); 1910 } 1911 return ni; 1912 } 1913 1914 #define IS_PROBEREQ(wh) \ 1915 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1916 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1917 #define IS_BCAST_PROBEREQ(wh) \ 1918 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1919 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1920 1921 static __inline struct ieee80211_node * 1922 _find_rxnode(struct ieee80211_node_table *nt, 1923 const struct ieee80211_frame_min *wh, 1924 const char *func __debrefcnt_used, int line __debrefcnt_used) 1925 { 1926 if (IS_BCAST_PROBEREQ(wh)) 1927 return NULL; /* spam bcast probe req to all vap's */ 1928 return _ieee80211_find_node_locked(nt, wh->i_addr2, func, line); 1929 } 1930 1931 /* 1932 * Locate the node for sender, track state, and then pass the 1933 * (referenced) node up to the 802.11 layer for its use. Note 1934 * we can return NULL if the sender is not in the table. 1935 */ 1936 struct ieee80211_node * 1937 _ieee80211_find_rxnode(struct ieee80211com *ic, 1938 const struct ieee80211_frame_min *wh, 1939 const char *func __debrefcnt_used, int line __debrefcnt_used) 1940 { 1941 struct ieee80211_node_table *nt; 1942 struct ieee80211_node *ni; 1943 1944 nt = &ic->ic_sta; 1945 IEEE80211_NODE_LOCK(nt); 1946 ni = _find_rxnode(nt, wh, func, line); 1947 IEEE80211_NODE_UNLOCK(nt); 1948 1949 return ni; 1950 } 1951 1952 /* 1953 * Like ieee80211_find_rxnode but use the supplied h/w 1954 * key index as a hint to locate the node in the key 1955 * mapping table. If an entry is present at the key 1956 * index we return it; otherwise do a normal lookup and 1957 * update the mapping table if the station has a unicast 1958 * key assigned to it. 1959 */ 1960 struct ieee80211_node * 1961 _ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1962 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1963 const char *func __debrefcnt_used, int line __debrefcnt_used) 1964 { 1965 struct ieee80211_node_table *nt; 1966 struct ieee80211_node *ni; 1967 1968 nt = &ic->ic_sta; 1969 IEEE80211_NODE_LOCK(nt); 1970 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1971 ni = nt->nt_keyixmap[keyix]; 1972 else 1973 ni = NULL; 1974 if (ni == NULL) { 1975 ni = _find_rxnode(nt, wh, func, line); 1976 if (ni != NULL && nt->nt_keyixmap != NULL) { 1977 /* 1978 * If the station has a unicast key cache slot 1979 * assigned update the key->node mapping table. 1980 */ 1981 keyix = ni->ni_ucastkey.wk_rxkeyix; 1982 /* XXX can keyixmap[keyix] != NULL? */ 1983 if (keyix < nt->nt_keyixmax && 1984 nt->nt_keyixmap[keyix] == NULL) { 1985 IEEE80211_DPRINTF(ni->ni_vap, 1986 IEEE80211_MSG_NODE, 1987 "%s: add key map entry %p<%s> refcnt %d\n", 1988 __func__, ni, ether_sprintf(ni->ni_macaddr), 1989 ieee80211_node_refcnt(ni)+1); 1990 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1991 } 1992 } 1993 } else { 1994 if (IS_BCAST_PROBEREQ(wh)) 1995 ni = NULL; /* spam bcast probe req to all vap's */ 1996 else 1997 ieee80211_ref_node(ni); 1998 } 1999 IEEE80211_NODE_UNLOCK(nt); 2000 2001 return ni; 2002 } 2003 #undef IS_BCAST_PROBEREQ 2004 #undef IS_PROBEREQ 2005 2006 /* 2007 * Return a reference to the appropriate node for sending 2008 * a data frame. This handles node discovery in adhoc networks. 2009 */ 2010 struct ieee80211_node * 2011 _ieee80211_find_txnode(struct ieee80211vap *vap, 2012 const uint8_t macaddr[IEEE80211_ADDR_LEN], 2013 const char *func __debrefcnt_used, int line __debrefcnt_used) 2014 { 2015 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 2016 struct ieee80211_node *ni; 2017 2018 /* 2019 * The destination address should be in the node table 2020 * unless this is a multicast/broadcast frame. We can 2021 * also optimize station mode operation, all frames go 2022 * to the bss node. 2023 */ 2024 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 2025 IEEE80211_NODE_LOCK(nt); 2026 if (vap->iv_opmode == IEEE80211_M_STA || 2027 vap->iv_opmode == IEEE80211_M_WDS || 2028 IEEE80211_IS_MULTICAST(macaddr)) 2029 ni = ieee80211_ref_node(vap->iv_bss); 2030 else 2031 ni = _ieee80211_find_node_locked(nt, macaddr, func, line); 2032 IEEE80211_NODE_UNLOCK(nt); 2033 2034 if (ni == NULL) { 2035 if (vap->iv_opmode == IEEE80211_M_IBSS || 2036 vap->iv_opmode == IEEE80211_M_AHDEMO) { 2037 /* 2038 * In adhoc mode cons up a node for the destination. 2039 * Note that we need an additional reference for the 2040 * caller to be consistent with 2041 * ieee80211_find_node_locked. 2042 */ 2043 /* 2044 * XXX TODO: this doesn't fake up 11n state; we need 2045 * to find another way to get it upgraded. 2046 */ 2047 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 2048 if (ni != NULL) 2049 (void) ieee80211_ref_node(ni); 2050 } else { 2051 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 2052 "no node, discard frame (%s)", __func__); 2053 vap->iv_stats.is_tx_nonode++; 2054 } 2055 } 2056 return ni; 2057 } 2058 2059 static void 2060 __ieee80211_free_node(struct ieee80211_node *ni) 2061 { 2062 struct ieee80211_node_table *nt = ni->ni_table; 2063 2064 /* 2065 * NB: careful about referencing the vap as it may be 2066 * gone if the last reference was held by a driver. 2067 * We know the com will always be present so it's safe 2068 * to use ni_ic below to reclaim resources. 2069 */ 2070 #if 0 2071 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2072 "%s %p<%s> in %s table\n", __func__, ni, 2073 ether_sprintf(ni->ni_macaddr), 2074 nt != NULL ? nt->nt_name : "<gone>"); 2075 #endif 2076 if (ni->ni_associd != 0) { 2077 struct ieee80211vap *vap = ni->ni_vap; 2078 if (vap->iv_aid_bitmap != NULL) 2079 IEEE80211_AID_CLR(vap, ni->ni_associd); 2080 } 2081 if (nt != NULL) 2082 ieee80211_del_node_nt(nt, ni); 2083 ni->ni_ic->ic_node_free(ni); 2084 } 2085 2086 /* 2087 * Clear any entry in the unicast key mapping table. 2088 */ 2089 static int 2090 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2091 { 2092 ieee80211_keyix keyix; 2093 2094 keyix = ni->ni_ucastkey.wk_rxkeyix; 2095 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 2096 nt->nt_keyixmap[keyix] == ni) { 2097 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2098 "%s: %p<%s> clear key map entry %u\n", 2099 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 2100 nt->nt_keyixmap[keyix] = NULL; 2101 ieee80211_node_decref(ni); 2102 return 1; 2103 } 2104 2105 return 0; 2106 } 2107 2108 void 2109 _ieee80211_free_node(struct ieee80211_node *ni, 2110 const char *func __debrefcnt_used, int line __debrefcnt_used) 2111 { 2112 struct ieee80211_node_table *nt = ni->ni_table; 2113 2114 #ifdef IEEE80211_DEBUG_REFCNT 2115 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2116 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 2117 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 2118 #endif 2119 if (nt != NULL) { 2120 IEEE80211_NODE_LOCK(nt); 2121 if (ieee80211_node_dectestref(ni)) { 2122 /* 2123 * Last reference, reclaim state. 2124 */ 2125 __ieee80211_free_node(ni); 2126 } else if (ieee80211_node_refcnt(ni) == 1) 2127 if (node_clear_keyixmap(nt, ni)) 2128 __ieee80211_free_node(ni); 2129 IEEE80211_NODE_UNLOCK(nt); 2130 } else { 2131 if (ieee80211_node_dectestref(ni)) 2132 __ieee80211_free_node(ni); 2133 } 2134 } 2135 2136 /* 2137 * Reclaim a unicast key and clear any key cache state. 2138 */ 2139 int 2140 ieee80211_node_delucastkey(struct ieee80211_node *ni) 2141 { 2142 struct ieee80211com *ic = ni->ni_ic; 2143 struct ieee80211_node_table *nt = &ic->ic_sta; 2144 struct ieee80211_node *nikey; 2145 ieee80211_keyix keyix; 2146 int isowned, status; 2147 2148 /* 2149 * NB: We must beware of LOR here; deleting the key 2150 * can cause the crypto layer to block traffic updates 2151 * which can generate a LOR against the node table lock; 2152 * grab it here and stash the key index for our use below. 2153 * 2154 * Must also beware of recursion on the node table lock. 2155 * When called from node_cleanup we may already have 2156 * the node table lock held. Unfortunately there's no 2157 * way to separate out this path so we must do this 2158 * conditionally. 2159 */ 2160 isowned = IEEE80211_NODE_IS_LOCKED(nt); 2161 if (!isowned) 2162 IEEE80211_NODE_LOCK(nt); 2163 nikey = NULL; 2164 status = 1; /* NB: success */ 2165 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 2166 keyix = ni->ni_ucastkey.wk_rxkeyix; 2167 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 2168 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 2169 nikey = nt->nt_keyixmap[keyix]; 2170 nt->nt_keyixmap[keyix] = NULL; 2171 } 2172 } 2173 if (!isowned) 2174 IEEE80211_NODE_UNLOCK(nt); 2175 2176 if (nikey != NULL) { 2177 KASSERT(nikey == ni, 2178 ("key map out of sync, ni %p nikey %p", ni, nikey)); 2179 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2180 "%s: delete key map entry %p<%s> refcnt %d\n", 2181 __func__, ni, ether_sprintf(ni->ni_macaddr), 2182 ieee80211_node_refcnt(ni)-1); 2183 ieee80211_free_node(ni); 2184 } 2185 return status; 2186 } 2187 2188 /* 2189 * Reclaim a node. If this is the last reference count then 2190 * do the normal free work. Otherwise remove it from the node 2191 * table and mark it gone by clearing the back-reference. 2192 */ 2193 static void 2194 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2195 { 2196 2197 IEEE80211_NODE_LOCK_ASSERT(nt); 2198 2199 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2200 "%s: remove %p<%s> from %s table, refcnt %d\n", 2201 __func__, ni, ether_sprintf(ni->ni_macaddr), 2202 nt->nt_name, ieee80211_node_refcnt(ni)-1); 2203 /* 2204 * Clear any entry in the unicast key mapping table. 2205 * We need to do it here so rx lookups don't find it 2206 * in the mapping table even if it's not in the hash 2207 * table. We cannot depend on the mapping table entry 2208 * being cleared because the node may not be free'd. 2209 */ 2210 (void)node_clear_keyixmap(nt, ni); 2211 if (!ieee80211_node_dectestref(ni)) { 2212 /* 2213 * Other references are present, just remove the 2214 * node from the table so it cannot be found. When 2215 * the references are dropped storage will be 2216 * reclaimed. 2217 */ 2218 ieee80211_del_node_nt(nt, ni); 2219 } else 2220 __ieee80211_free_node(ni); 2221 } 2222 2223 /* 2224 * Node table support. 2225 */ 2226 2227 static void 2228 ieee80211_node_table_init(struct ieee80211com *ic, 2229 struct ieee80211_node_table *nt, 2230 const char *name, int inact, int keyixmax) 2231 { 2232 2233 nt->nt_ic = ic; 2234 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 2235 TAILQ_INIT(&nt->nt_node); 2236 nt->nt_count = 0; 2237 nt->nt_name = name; 2238 nt->nt_inact_init = inact; 2239 nt->nt_keyixmax = keyixmax; 2240 if (nt->nt_keyixmax > 0) { 2241 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 2242 keyixmax * sizeof(struct ieee80211_node *), 2243 M_80211_NODE, 2244 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2245 if (nt->nt_keyixmap == NULL) 2246 ic_printf(ic, 2247 "Cannot allocate key index map with %u entries\n", 2248 keyixmax); 2249 } else 2250 nt->nt_keyixmap = NULL; 2251 } 2252 2253 static void 2254 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 2255 struct ieee80211vap *match) 2256 { 2257 struct ieee80211_node *ni, *next; 2258 2259 IEEE80211_NODE_LOCK(nt); 2260 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 2261 if (match != NULL && ni->ni_vap != match) 2262 continue; 2263 /* XXX can this happen? if so need's work */ 2264 if (ni->ni_associd != 0) { 2265 struct ieee80211vap *vap = ni->ni_vap; 2266 2267 if (vap->iv_auth->ia_node_leave != NULL) 2268 vap->iv_auth->ia_node_leave(ni); 2269 if (vap->iv_aid_bitmap != NULL) 2270 IEEE80211_AID_CLR(vap, ni->ni_associd); 2271 } 2272 ni->ni_wdsvap = NULL; /* clear reference */ 2273 node_reclaim(nt, ni); 2274 } 2275 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 2276 /* 2277 * Make a separate pass to clear references to this vap 2278 * held by DWDS entries. They will not be matched above 2279 * because ni_vap will point to the ap vap but we still 2280 * need to clear ni_wdsvap when the WDS vap is destroyed 2281 * and/or reset. 2282 */ 2283 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 2284 if (ni->ni_wdsvap == match) 2285 ni->ni_wdsvap = NULL; 2286 } 2287 IEEE80211_NODE_UNLOCK(nt); 2288 } 2289 2290 static void 2291 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2292 { 2293 ieee80211_node_table_reset(nt, NULL); 2294 if (nt->nt_keyixmap != NULL) { 2295 #ifdef DIAGNOSTIC 2296 /* XXX verify all entries are NULL */ 2297 int i; 2298 for (i = 0; i < nt->nt_keyixmax; i++) 2299 if (nt->nt_keyixmap[i] != NULL) 2300 printf("%s: %s[%u] still active\n", __func__, 2301 nt->nt_name, i); 2302 #endif 2303 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 2304 nt->nt_keyixmap = NULL; 2305 } 2306 IEEE80211_NODE_LOCK_DESTROY(nt); 2307 } 2308 2309 static void 2310 timeout_stations(void *arg __unused, struct ieee80211_node *ni) 2311 { 2312 struct ieee80211com *ic = ni->ni_ic; 2313 struct ieee80211vap *vap = ni->ni_vap; 2314 2315 /* 2316 * Only process stations when in RUN state. This 2317 * insures, for example, that we don't timeout an 2318 * inactive station during CAC. Note that CSA state 2319 * is actually handled in ieee80211_node_timeout as 2320 * it applies to more than timeout processing. 2321 */ 2322 if (vap->iv_state != IEEE80211_S_RUN) 2323 return; 2324 /* 2325 * Ignore entries for which have yet to receive an 2326 * authentication frame. These are transient and 2327 * will be reclaimed when the last reference to them 2328 * goes away (when frame xmits complete). 2329 */ 2330 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2331 vap->iv_opmode == IEEE80211_M_STA) && 2332 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2333 return; 2334 /* 2335 * Free fragment if not needed anymore 2336 * (last fragment older than 1s). 2337 * XXX doesn't belong here, move to node_age 2338 */ 2339 if (ni->ni_rxfrag[0] != NULL && 2340 ticks > ni->ni_rxfragstamp + hz) { 2341 m_freem(ni->ni_rxfrag[0]); 2342 ni->ni_rxfrag[0] = NULL; 2343 } 2344 if (ni->ni_inact > 0) { 2345 ni->ni_inact--; 2346 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2347 "%s: inact %u inact_reload %u nrates %u", 2348 __func__, ni->ni_inact, ni->ni_inact_reload, 2349 ni->ni_rates.rs_nrates); 2350 } 2351 /* 2352 * Special case ourself; we may be idle for extended periods 2353 * of time and regardless reclaiming our state is wrong. 2354 * XXX run ic_node_age 2355 */ 2356 /* XXX before inact decrement? */ 2357 if (ni == vap->iv_bss) 2358 return; 2359 if (ni->ni_associd != 0 || 2360 (vap->iv_opmode == IEEE80211_M_IBSS || 2361 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2362 /* 2363 * Age/drain resources held by the station. 2364 */ 2365 ic->ic_node_age(ni); 2366 /* 2367 * Probe the station before time it out. We 2368 * send a null data frame which may not be 2369 * universally supported by drivers (need it 2370 * for ps-poll support so it should be...). 2371 * 2372 * XXX don't probe the station unless we've 2373 * received a frame from them (and have 2374 * some idea of the rates they are capable 2375 * of); this will get fixed more properly 2376 * soon with better handling of the rate set. 2377 */ 2378 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2379 (0 < ni->ni_inact && 2380 ni->ni_inact <= vap->iv_inact_probe) && 2381 ni->ni_rates.rs_nrates != 0) { 2382 IEEE80211_NOTE(vap, 2383 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2384 ni, "%s", 2385 "probe station due to inactivity"); 2386 /* 2387 * Grab a reference so the node cannot 2388 * be reclaimed before we send the frame. 2389 * ieee80211_send_nulldata understands 2390 * we've done this and reclaims the 2391 * ref for us as needed. 2392 */ 2393 /* XXX fix this (not required anymore). */ 2394 ieee80211_ref_node(ni); 2395 /* XXX useless */ 2396 ieee80211_send_nulldata(ni); 2397 /* XXX stat? */ 2398 return; 2399 } 2400 } 2401 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2402 ni->ni_inact <= 0) { 2403 IEEE80211_NOTE(vap, 2404 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2405 "station timed out due to inactivity " 2406 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2407 /* 2408 * Send a deauthenticate frame and drop the station. 2409 * This is somewhat complicated due to reference counts 2410 * and locking. At this point a station will typically 2411 * have a reference count of 2. ieee80211_node_leave 2412 * will do a "free" of the node which will drop the 2413 * reference count. But in the meantime a reference 2414 * wil be held by the deauth frame. The actual reclaim 2415 * of the node will happen either after the tx is 2416 * completed or by ieee80211_node_leave. 2417 */ 2418 if (ni->ni_associd != 0) { 2419 IEEE80211_SEND_MGMT(ni, 2420 IEEE80211_FC0_SUBTYPE_DEAUTH, 2421 IEEE80211_REASON_AUTH_EXPIRE); 2422 } 2423 ieee80211_node_leave(ni); 2424 vap->iv_stats.is_node_timeout++; 2425 } 2426 } 2427 2428 /* 2429 * Timeout inactive stations and do related housekeeping. 2430 */ 2431 static void 2432 ieee80211_timeout_stations(struct ieee80211com *ic) 2433 { 2434 struct ieee80211_node_table *nt = &ic->ic_sta; 2435 2436 ieee80211_iterate_nodes(nt, timeout_stations, NULL); 2437 } 2438 2439 /* 2440 * Aggressively reclaim resources. This should be used 2441 * only in a critical situation to reclaim mbuf resources. 2442 */ 2443 void 2444 ieee80211_drain(struct ieee80211com *ic) 2445 { 2446 struct ieee80211_node_table *nt = &ic->ic_sta; 2447 struct ieee80211vap *vap; 2448 struct ieee80211_node *ni; 2449 2450 IEEE80211_NODE_LOCK(nt); 2451 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2452 /* 2453 * Ignore entries for which have yet to receive an 2454 * authentication frame. These are transient and 2455 * will be reclaimed when the last reference to them 2456 * goes away (when frame xmits complete). 2457 */ 2458 vap = ni->ni_vap; 2459 /* 2460 * Only process stations when in RUN state. This 2461 * insures, for example, that we don't timeout an 2462 * inactive station during CAC. Note that CSA state 2463 * is actually handled in ieee80211_node_timeout as 2464 * it applies to more than timeout processing. 2465 */ 2466 if (vap->iv_state != IEEE80211_S_RUN) 2467 continue; 2468 /* XXX can vap be NULL? */ 2469 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2470 vap->iv_opmode == IEEE80211_M_STA) && 2471 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2472 continue; 2473 /* 2474 * Free fragments. 2475 * XXX doesn't belong here, move to node_drain 2476 */ 2477 if (ni->ni_rxfrag[0] != NULL) { 2478 m_freem(ni->ni_rxfrag[0]); 2479 ni->ni_rxfrag[0] = NULL; 2480 } 2481 /* 2482 * Drain resources held by the station. 2483 */ 2484 ic->ic_node_drain(ni); 2485 } 2486 IEEE80211_NODE_UNLOCK(nt); 2487 } 2488 2489 /* 2490 * Per-ieee80211vap inactivity timer callback. 2491 */ 2492 static void 2493 ieee80211_vap_timeout(struct ieee80211vap *vap) 2494 { 2495 2496 IEEE80211_LOCK_ASSERT(vap->iv_ic); 2497 2498 ieee80211_vap_erp_timeout(vap); 2499 ieee80211_ht_timeout(vap); 2500 ieee80211_vht_timeout(vap); 2501 } 2502 2503 /* 2504 * Per-ieee80211com inactivity timer callback. 2505 */ 2506 void 2507 ieee80211_node_timeout(void *arg) 2508 { 2509 struct ieee80211com *ic = arg; 2510 struct ieee80211vap *vap; 2511 2512 /* 2513 * Defer timeout processing if a channel switch is pending. 2514 * We typically need to be mute so not doing things that 2515 * might generate frames is good to handle in one place. 2516 * Suppressing the station timeout processing may extend the 2517 * lifetime of inactive stations (by not decrementing their 2518 * idle counters) but this should be ok unless the CSA is 2519 * active for an unusually long time. 2520 */ 2521 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2522 ieee80211_scan_timeout(ic); 2523 ieee80211_timeout_stations(ic); 2524 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2525 2526 IEEE80211_LOCK(ic); 2527 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2528 ieee80211_vap_timeout(vap); 2529 IEEE80211_UNLOCK(ic); 2530 } 2531 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2532 ieee80211_node_timeout, ic); 2533 } 2534 2535 /* 2536 * The same as ieee80211_iterate_nodes(), but for one vap only. 2537 */ 2538 int 2539 ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt, 2540 struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg) 2541 { 2542 struct ieee80211_node **ni_arr; 2543 struct ieee80211_node *ni; 2544 size_t size; 2545 int count, i; 2546 2547 /* 2548 * Iterate over the node table and save an array of ref'ed nodes. 2549 * 2550 * This is separated out from calling the actual node function so that 2551 * no LORs will occur. 2552 */ 2553 IEEE80211_NODE_LOCK(nt); 2554 count = nt->nt_count; 2555 size = count * sizeof(struct ieee80211_node *); 2556 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2557 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2558 if (ni_arr == NULL) { 2559 IEEE80211_NODE_UNLOCK(nt); 2560 return (ENOMEM); 2561 } 2562 2563 i = 0; 2564 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2565 if (vap != NULL && ni->ni_vap != vap) 2566 continue; 2567 KASSERT(i < count, 2568 ("node array overflow (vap %p, i %d, count %d)\n", 2569 vap, i, count)); 2570 ni_arr[i] = ieee80211_ref_node(ni); 2571 i++; 2572 } 2573 IEEE80211_NODE_UNLOCK(nt); 2574 2575 for (i = 0; i < count; i++) { 2576 if (ni_arr[i] == NULL) /* end of the list */ 2577 break; 2578 (*f)(arg, ni_arr[i]); 2579 /* ieee80211_free_node() locks by itself */ 2580 ieee80211_free_node(ni_arr[i]); 2581 } 2582 2583 IEEE80211_FREE(ni_arr, M_80211_NODE); 2584 2585 return (0); 2586 } 2587 2588 /* 2589 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2590 * reference in the source. 2591 */ 2592 void 2593 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2594 ieee80211_iter_func *f, void *arg) 2595 { 2596 /* XXX no way to pass error to the caller. */ 2597 (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg); 2598 } 2599 2600 void 2601 ieee80211_dump_node(struct ieee80211_node_table *nt __unused, 2602 struct ieee80211_node *ni) 2603 { 2604 printf("%p: mac %s refcnt %d\n", ni, 2605 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2606 printf("\tauthmode %u flags 0x%x\n", 2607 ni->ni_authmode, ni->ni_flags); 2608 printf("\tassocid 0x%x txpower %u vlan %u\n", 2609 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2610 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2611 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2612 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2613 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2614 ni->ni_rxfragstamp); 2615 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2616 node_getrssi(ni), ni->ni_noise, 2617 ni->ni_intval, ni->ni_capinfo); 2618 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2619 ether_sprintf(ni->ni_bssid), 2620 ni->ni_esslen, ni->ni_essid, 2621 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2622 printf("\tinact %u inact_reload %u txrate %u\n", 2623 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2624 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2625 ni->ni_htcap, ni->ni_htparam, 2626 ni->ni_htctlchan, ni->ni_ht2ndchan); 2627 printf("\thtopmode %x htstbc %x htchw %u\n", 2628 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2629 printf("\tvhtcap %x freq1 %d freq2 %d vhtbasicmcs %x\n", 2630 ni->ni_vhtcap, (int) ni->ni_vht_chan1, (int) ni->ni_vht_chan2, 2631 (int) ni->ni_vht_basicmcs); 2632 /* XXX VHT state */ 2633 } 2634 2635 void 2636 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2637 { 2638 ieee80211_iterate_nodes(nt, 2639 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2640 } 2641 2642 /* 2643 * Iterate over the VAPs and update their ERP beacon IEs. 2644 * 2645 * Note this must be called from the deferred ERP update task paths. 2646 */ 2647 void 2648 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2649 { 2650 struct ieee80211vap *vap; 2651 2652 IEEE80211_LOCK_ASSERT(ic); 2653 2654 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2655 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2656 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2657 } 2658 2659 /* 2660 * Handle a station joining an 11g network. 2661 */ 2662 static void 2663 ieee80211_node_join_11g(struct ieee80211_node *ni) 2664 { 2665 struct ieee80211com *ic = ni->ni_ic; 2666 struct ieee80211vap *vap = ni->ni_vap; 2667 2668 IEEE80211_LOCK_ASSERT(ic); 2669 2670 /* 2671 * Station isn't capable of short slot time. Bump 2672 * the count of long slot time stations and disable 2673 * use of short slot time. Note that the actual switch 2674 * over to long slot time use may not occur until the 2675 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2676 */ 2677 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2678 vap->iv_longslotsta++; 2679 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2680 "station needs long slot time, count %d", 2681 vap->iv_longslotsta); 2682 /* 2683 * XXX TODO: this may need all VAPs checked! 2684 */ 2685 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2686 /* 2687 * Don't force slot time when switched to turbo 2688 * mode as non-ERP stations won't be present; this 2689 * need only be done when on the normal G channel. 2690 */ 2691 ieee80211_vap_set_shortslottime(vap, 0); 2692 } 2693 } 2694 /* 2695 * If the new station is not an ERP station 2696 * then bump the counter and enable protection 2697 * if configured. 2698 */ 2699 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2700 vap->iv_nonerpsta++; 2701 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2702 "station is !ERP, %d non-ERP stations associated", 2703 vap->iv_nonerpsta); 2704 /* 2705 * If station does not support short preamble 2706 * then we must enable use of Barker preamble. 2707 */ 2708 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2709 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2710 "%s", "station needs long preamble"); 2711 vap->iv_flags |= IEEE80211_F_USEBARKER; 2712 vap->iv_flags &= ~IEEE80211_F_SHPREAMBLE; 2713 ieee80211_vap_update_preamble(vap); 2714 } 2715 /* 2716 * If protection is configured and this is the first 2717 * indication we should use protection, enable it. 2718 */ 2719 if (vap->iv_protmode != IEEE80211_PROT_NONE && 2720 vap->iv_nonerpsta == 1 && 2721 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2722 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2723 "%s: enable use of protection\n", __func__); 2724 vap->iv_flags |= IEEE80211_F_USEPROT; 2725 ieee80211_vap_update_erp_protmode(vap); 2726 } 2727 } else 2728 ni->ni_flags |= IEEE80211_NODE_ERP; 2729 } 2730 2731 void 2732 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2733 { 2734 struct ieee80211com *ic = ni->ni_ic; 2735 struct ieee80211vap *vap = ni->ni_vap; 2736 int newassoc; 2737 2738 if (ni->ni_associd == 0) { 2739 uint16_t aid; 2740 2741 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2742 /* 2743 * It would be good to search the bitmap 2744 * more efficiently, but this will do for now. 2745 */ 2746 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2747 if (!IEEE80211_AID_ISSET(vap, aid)) 2748 break; 2749 } 2750 if (aid >= vap->iv_max_aid) { 2751 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2752 ieee80211_node_leave(ni); 2753 return; 2754 } 2755 ni->ni_associd = aid | 0xc000; 2756 ni->ni_jointime = time_uptime; 2757 IEEE80211_LOCK(ic); 2758 IEEE80211_AID_SET(vap, ni->ni_associd); 2759 vap->iv_sta_assoc++; 2760 2761 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2762 ieee80211_ht_node_join(ni); 2763 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2764 ieee80211_vht_node_join(ni); 2765 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2766 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2767 ieee80211_node_join_11g(ni); 2768 IEEE80211_UNLOCK(ic); 2769 2770 newassoc = 1; 2771 } else 2772 newassoc = 0; 2773 2774 /* 2775 * XXX VHT - should log VHT channel width, etc 2776 */ 2777 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2778 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s%s", 2779 IEEE80211_NODE_AID(ni), 2780 vap->iv_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2781 vap->iv_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2782 vap->iv_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2783 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2784 /* XXX update for VHT string */ 2785 ni->ni_flags & IEEE80211_NODE_HT ? 2786 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2787 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2788 ni->ni_flags & IEEE80211_NODE_AMSDU ? " (+AMSDU)" : "", 2789 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2790 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2791 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2792 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2793 ", fast-frames" : "", 2794 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2795 ", turbo" : "" 2796 ); 2797 2798 ieee80211_node_setuptxparms(ni); 2799 ieee80211_ratectl_node_init(ni); 2800 /* give driver a chance to setup state like ni_txrate */ 2801 if (ic->ic_newassoc != NULL) 2802 ic->ic_newassoc(ni, newassoc); 2803 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2804 /* tell the authenticator about new station */ 2805 if (vap->iv_auth->ia_node_join != NULL) 2806 vap->iv_auth->ia_node_join(ni); 2807 ieee80211_notify_node_join(ni, 2808 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2809 } 2810 2811 static void 2812 disable_protection(struct ieee80211vap *vap) 2813 { 2814 struct ieee80211com *ic = vap->iv_ic; 2815 2816 KASSERT(vap->iv_nonerpsta == 0 && 2817 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2818 ("%d non ERP stations, flags 0x%x", vap->iv_nonerpsta, 2819 vap->iv_flags_ext)); 2820 2821 vap->iv_flags &= ~IEEE80211_F_USEPROT; 2822 /* XXX verify mode? */ 2823 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2824 vap->iv_flags |= IEEE80211_F_SHPREAMBLE; 2825 vap->iv_flags &= ~IEEE80211_F_USEBARKER; 2826 } 2827 ieee80211_vap_update_erp_protmode(vap); 2828 ieee80211_vap_update_preamble(vap); 2829 } 2830 2831 /* 2832 * Handle a station leaving an 11g network. 2833 */ 2834 static void 2835 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2836 { 2837 struct ieee80211com *ic = ni->ni_ic; 2838 struct ieee80211vap *vap = ni->ni_vap; 2839 2840 IEEE80211_LOCK_ASSERT(ic); 2841 2842 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2843 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2844 ic->ic_bsschan->ic_flags)); 2845 2846 /* 2847 * If a long slot station do the slot time bookkeeping. 2848 */ 2849 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2850 KASSERT(vap->iv_longslotsta > 0, 2851 ("bogus long slot station count %d", vap->iv_longslotsta)); 2852 vap->iv_longslotsta--; 2853 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2854 "long slot time station leaves, count now %d", 2855 vap->iv_longslotsta); 2856 /* 2857 * XXX TODO: this may need all VAPs checked! 2858 */ 2859 if (vap->iv_longslotsta == 0) { 2860 /* 2861 * Re-enable use of short slot time if supported 2862 * and not operating in IBSS mode (per spec). 2863 */ 2864 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2865 ic->ic_opmode != IEEE80211_M_IBSS) { 2866 IEEE80211_DPRINTF(ni->ni_vap, 2867 IEEE80211_MSG_ASSOC, 2868 "%s: re-enable use of short slot time\n", 2869 __func__); 2870 ieee80211_vap_set_shortslottime(vap, 1); 2871 } 2872 } 2873 } 2874 /* 2875 * If a non-ERP station do the protection-related bookkeeping. 2876 */ 2877 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2878 KASSERT(vap->iv_nonerpsta > 0, 2879 ("bogus non-ERP station count %d", vap->iv_nonerpsta)); 2880 vap->iv_nonerpsta--; 2881 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2882 "non-ERP station leaves, count now %d%s", vap->iv_nonerpsta, 2883 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2884 " (non-ERP sta present)" : ""); 2885 if (vap->iv_nonerpsta == 0 && 2886 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2887 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2888 "%s: disable use of protection\n", __func__); 2889 disable_protection(vap); 2890 } 2891 } 2892 } 2893 2894 /* 2895 * Time out presence of an overlapping bss with non-ERP 2896 * stations. When operating in hostap mode we listen for 2897 * beacons from other stations and if we identify a non-ERP 2898 * station is present we enable protection. To identify 2899 * when all non-ERP stations are gone we time out this 2900 * condition. 2901 */ 2902 static void 2903 ieee80211_vap_erp_timeout(struct ieee80211vap *vap) 2904 { 2905 2906 IEEE80211_LOCK_ASSERT(vap->iv_ic); 2907 2908 if ((vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2909 ieee80211_time_after(ticks, vap->iv_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2910 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 2911 "%s", "age out non-ERP sta present on channel"); 2912 vap->iv_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2913 if (vap->iv_nonerpsta == 0) 2914 disable_protection(vap); 2915 } 2916 } 2917 2918 /* 2919 * Handle bookkeeping for station deauthentication/disassociation 2920 * when operating as an ap. 2921 */ 2922 void 2923 ieee80211_node_leave(struct ieee80211_node *ni) 2924 { 2925 struct ieee80211com *ic = ni->ni_ic; 2926 struct ieee80211vap *vap = ni->ni_vap; 2927 struct ieee80211_node_table *nt = ni->ni_table; 2928 2929 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2930 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2931 2932 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2933 ("unexpected operating mode %u", vap->iv_opmode)); 2934 /* 2935 * If node wasn't previously associated all 2936 * we need to do is reclaim the reference. 2937 */ 2938 /* XXX ibss mode bypasses 11g and notification */ 2939 if (ni->ni_associd == 0) 2940 goto done; 2941 /* 2942 * Tell the authenticator the station is leaving. 2943 * Note that we must do this before yanking the 2944 * association id as the authenticator uses the 2945 * associd to locate it's state block. 2946 */ 2947 if (vap->iv_auth->ia_node_leave != NULL) 2948 vap->iv_auth->ia_node_leave(ni); 2949 2950 IEEE80211_LOCK(ic); 2951 IEEE80211_AID_CLR(vap, ni->ni_associd); 2952 vap->iv_sta_assoc--; 2953 2954 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2955 ieee80211_vht_node_leave(ni); 2956 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2957 ieee80211_ht_node_leave(ni); 2958 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2959 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2960 ieee80211_node_leave_11g(ni); 2961 IEEE80211_UNLOCK(ic); 2962 /* 2963 * Cleanup station state. In particular clear various 2964 * state that might otherwise be reused if the node 2965 * is reused before the reference count goes to zero 2966 * (and memory is reclaimed). 2967 */ 2968 ieee80211_sta_leave(ni); 2969 done: 2970 /* 2971 * Remove the node from any table it's recorded in and 2972 * drop the caller's reference. Removal from the table 2973 * is important to insure the node is not reprocessed 2974 * for inactivity. 2975 */ 2976 if (nt != NULL) { 2977 IEEE80211_NODE_LOCK(nt); 2978 node_reclaim(nt, ni); 2979 IEEE80211_NODE_UNLOCK(nt); 2980 } else 2981 ieee80211_free_node(ni); 2982 } 2983 2984 struct rssiinfo { 2985 int rssi_samples; 2986 uint32_t rssi_total; 2987 }; 2988 2989 static void 2990 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2991 { 2992 struct rssiinfo *info = arg; 2993 struct ieee80211vap *vap = ni->ni_vap; 2994 int8_t rssi; 2995 2996 /* only associated stations */ 2997 if (ni->ni_associd == 0) 2998 return; 2999 rssi = vap->iv_ic->ic_node_getrssi(ni); 3000 if (rssi != 0) { 3001 info->rssi_samples++; 3002 info->rssi_total += rssi; 3003 } 3004 } 3005 3006 static void 3007 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 3008 { 3009 struct rssiinfo *info = arg; 3010 struct ieee80211vap *vap = ni->ni_vap; 3011 int8_t rssi; 3012 3013 /* only neighbors */ 3014 /* XXX check bssid */ 3015 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 3016 return; 3017 rssi = vap->iv_ic->ic_node_getrssi(ni); 3018 if (rssi != 0) { 3019 info->rssi_samples++; 3020 info->rssi_total += rssi; 3021 } 3022 } 3023 3024 #ifdef IEEE80211_SUPPORT_MESH 3025 static void 3026 get_mesh_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 that peered successfully */ 3033 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 3034 return; 3035 rssi = vap->iv_ic->ic_node_getrssi(ni); 3036 if (rssi != 0) { 3037 info->rssi_samples++; 3038 info->rssi_total += rssi; 3039 } 3040 } 3041 #endif /* IEEE80211_SUPPORT_MESH */ 3042 3043 int8_t 3044 ieee80211_getrssi(struct ieee80211vap *vap) 3045 { 3046 #define NZ(x) ((x) == 0 ? 1 : (x)) 3047 struct ieee80211com *ic = vap->iv_ic; 3048 struct rssiinfo info; 3049 3050 info.rssi_total = 0; 3051 info.rssi_samples = 0; 3052 switch (vap->iv_opmode) { 3053 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 3054 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 3055 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi, 3056 &info); 3057 break; 3058 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 3059 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi, 3060 &info); 3061 break; 3062 #ifdef IEEE80211_SUPPORT_MESH 3063 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 3064 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi, 3065 &info); 3066 break; 3067 #endif 3068 case IEEE80211_M_MONITOR: /* XXX */ 3069 case IEEE80211_M_STA: /* use stats from associated ap */ 3070 default: 3071 if (vap->iv_bss != NULL) 3072 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 3073 info.rssi_samples = 1; 3074 break; 3075 } 3076 return info.rssi_total / NZ(info.rssi_samples); 3077 #undef NZ 3078 } 3079 3080 void 3081 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 3082 { 3083 3084 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 3085 return; 3086 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 3087 /* for non-station mode return avg'd rssi accounting */ 3088 if (vap->iv_opmode != IEEE80211_M_STA) 3089 *rssi = ieee80211_getrssi(vap); 3090 } 3091