1 /*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 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 /* 61 * IEEE80211_NODE_HASHSIZE must be a power of 2. 62 */ 63 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 64 65 /* 66 * Association id's are managed with a bit vector. 67 */ 68 #define IEEE80211_AID_SET(_vap, b) \ 69 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 70 (1 << (IEEE80211_AID(b) % 32))) 71 #define IEEE80211_AID_CLR(_vap, b) \ 72 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 73 ~(1 << (IEEE80211_AID(b) % 32))) 74 #define IEEE80211_AID_ISSET(_vap, b) \ 75 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 76 77 static int ieee80211_sta_join1(struct ieee80211_node *); 78 79 static struct ieee80211_node *node_alloc(struct ieee80211vap *, 80 const uint8_t [IEEE80211_ADDR_LEN]); 81 static void node_cleanup(struct ieee80211_node *); 82 static void node_free(struct ieee80211_node *); 83 static void node_age(struct ieee80211_node *); 84 static int8_t node_getrssi(const struct ieee80211_node *); 85 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 86 static void node_getmimoinfo(const struct ieee80211_node *, 87 struct ieee80211_mimo_info *); 88 89 static void _ieee80211_free_node(struct ieee80211_node *); 90 91 static void node_reclaim(struct ieee80211_node_table *nt, 92 struct ieee80211_node *ni); 93 static void ieee80211_node_table_init(struct ieee80211com *ic, 94 struct ieee80211_node_table *nt, const char *name, 95 int inact, int keymaxix); 96 static void ieee80211_node_table_reset(struct ieee80211_node_table *, 97 struct ieee80211vap *); 98 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 99 static void ieee80211_erp_timeout(struct ieee80211com *); 100 101 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 102 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 103 104 void 105 ieee80211_node_attach(struct ieee80211com *ic) 106 { 107 /* XXX really want maxlen enforced per-sta */ 108 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 109 "802.11 staging q"); 110 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 111 IEEE80211_INACT_INIT, ic->ic_max_keyix); 112 callout_init(&ic->ic_inact, 1); 113 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 114 ieee80211_node_timeout, ic); 115 116 ic->ic_node_alloc = node_alloc; 117 ic->ic_node_free = node_free; 118 ic->ic_node_cleanup = node_cleanup; 119 ic->ic_node_age = node_age; 120 ic->ic_node_drain = node_age; /* NB: same as age */ 121 ic->ic_node_getrssi = node_getrssi; 122 ic->ic_node_getsignal = node_getsignal; 123 ic->ic_node_getmimoinfo = node_getmimoinfo; 124 125 /* 126 * Set flags to be propagated to all vap's; 127 * these define default behaviour/configuration. 128 */ 129 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 130 } 131 132 void 133 ieee80211_node_detach(struct ieee80211com *ic) 134 { 135 136 callout_drain(&ic->ic_inact); 137 ieee80211_node_table_cleanup(&ic->ic_sta); 138 ieee80211_ageq_cleanup(&ic->ic_stageq); 139 } 140 141 void 142 ieee80211_node_vattach(struct ieee80211vap *vap) 143 { 144 /* NB: driver can override */ 145 vap->iv_max_aid = IEEE80211_AID_DEF; 146 147 /* default station inactivity timer setings */ 148 vap->iv_inact_init = IEEE80211_INACT_INIT; 149 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 150 vap->iv_inact_run = IEEE80211_INACT_RUN; 151 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 152 153 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 154 "%s: init %u auth %u run %u probe %u\n", __func__, 155 vap->iv_inact_init, vap->iv_inact_auth, 156 vap->iv_inact_run, vap->iv_inact_probe); 157 } 158 159 void 160 ieee80211_node_latevattach(struct ieee80211vap *vap) 161 { 162 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 163 /* XXX should we allow max aid to be zero? */ 164 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 165 vap->iv_max_aid = IEEE80211_AID_MIN; 166 if_printf(vap->iv_ifp, 167 "WARNING: max aid too small, changed to %d\n", 168 vap->iv_max_aid); 169 } 170 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( 171 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 172 M_80211_NODE, 173 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 174 if (vap->iv_aid_bitmap == NULL) { 175 /* XXX no way to recover */ 176 printf("%s: no memory for AID bitmap, max aid %d!\n", 177 __func__, vap->iv_max_aid); 178 vap->iv_max_aid = 0; 179 } 180 } 181 182 ieee80211_reset_bss(vap); 183 184 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 185 } 186 187 void 188 ieee80211_node_vdetach(struct ieee80211vap *vap) 189 { 190 struct ieee80211com *ic = vap->iv_ic; 191 192 ieee80211_node_table_reset(&ic->ic_sta, vap); 193 if (vap->iv_bss != NULL) { 194 ieee80211_free_node(vap->iv_bss); 195 vap->iv_bss = NULL; 196 } 197 if (vap->iv_aid_bitmap != NULL) { 198 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); 199 vap->iv_aid_bitmap = NULL; 200 } 201 } 202 203 /* 204 * Port authorize/unauthorize interfaces for use by an authenticator. 205 */ 206 207 void 208 ieee80211_node_authorize(struct ieee80211_node *ni) 209 { 210 struct ieee80211vap *vap = ni->ni_vap; 211 212 ni->ni_flags |= IEEE80211_NODE_AUTH; 213 ni->ni_inact_reload = vap->iv_inact_run; 214 ni->ni_inact = ni->ni_inact_reload; 215 216 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 217 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 218 } 219 220 void 221 ieee80211_node_unauthorize(struct ieee80211_node *ni) 222 { 223 struct ieee80211vap *vap = ni->ni_vap; 224 225 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 226 ni->ni_inact_reload = vap->iv_inact_auth; 227 if (ni->ni_inact > ni->ni_inact_reload) 228 ni->ni_inact = ni->ni_inact_reload; 229 230 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 231 "%s: inact_reload %u inact %u", __func__, 232 ni->ni_inact_reload, ni->ni_inact); 233 } 234 235 /* 236 * Fix tx parameters for a node according to ``association state''. 237 */ 238 void 239 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 240 { 241 struct ieee80211vap *vap = ni->ni_vap; 242 enum ieee80211_phymode mode; 243 244 if (ni->ni_flags & IEEE80211_NODE_HT) { 245 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 246 mode = IEEE80211_MODE_11NA; 247 else 248 mode = IEEE80211_MODE_11NG; 249 } else { /* legacy rate handling */ 250 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 251 mode = IEEE80211_MODE_STURBO_A; 252 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 253 mode = IEEE80211_MODE_HALF; 254 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 255 mode = IEEE80211_MODE_QUARTER; 256 /* NB: 108A should be handled as 11a */ 257 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 258 mode = IEEE80211_MODE_11A; 259 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 260 (ni->ni_flags & IEEE80211_NODE_ERP)) 261 mode = IEEE80211_MODE_11G; 262 else 263 mode = IEEE80211_MODE_11B; 264 } 265 ni->ni_txparms = &vap->iv_txparms[mode]; 266 } 267 268 /* 269 * Set/change the channel. The rate set is also updated as 270 * to insure a consistent view by drivers. 271 * XXX should be private but hostap needs it to deal with CSA 272 */ 273 void 274 ieee80211_node_set_chan(struct ieee80211_node *ni, 275 struct ieee80211_channel *chan) 276 { 277 struct ieee80211com *ic = ni->ni_ic; 278 struct ieee80211vap *vap = ni->ni_vap; 279 enum ieee80211_phymode mode; 280 281 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 282 283 ni->ni_chan = chan; 284 mode = ieee80211_chan2mode(chan); 285 if (IEEE80211_IS_CHAN_HT(chan)) { 286 /* 287 * We must install the legacy rate est in ni_rates and the 288 * HT rate set in ni_htrates. 289 */ 290 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 291 /* 292 * Setup bss tx parameters based on operating mode. We 293 * use legacy rates when operating in a mixed HT+non-HT bss 294 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 295 */ 296 if (mode == IEEE80211_MODE_11NA && 297 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 298 mode = IEEE80211_MODE_11A; 299 else if (mode == IEEE80211_MODE_11NG && 300 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 301 mode = IEEE80211_MODE_11G; 302 if (mode == IEEE80211_MODE_11G && 303 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 304 mode = IEEE80211_MODE_11B; 305 } 306 ni->ni_txparms = &vap->iv_txparms[mode]; 307 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 308 } 309 310 static __inline void 311 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 312 { 313 /* propagate useful state */ 314 nbss->ni_authmode = obss->ni_authmode; 315 nbss->ni_txpower = obss->ni_txpower; 316 nbss->ni_vlan = obss->ni_vlan; 317 /* XXX statistics? */ 318 /* XXX legacy WDS bssid? */ 319 } 320 321 void 322 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 323 { 324 struct ieee80211com *ic = vap->iv_ic; 325 struct ieee80211_node *ni; 326 327 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 328 "%s: creating %s on channel %u%c flags 0x%08x\n", __func__, 329 ieee80211_opmode_name[vap->iv_opmode], 330 ieee80211_chan2ieee(ic, chan), 331 ieee80211_channel_type_char(chan), 332 chan->ic_flags); 333 334 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 335 if (ni == NULL) { 336 /* XXX recovery? */ 337 return; 338 } 339 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 340 ni->ni_esslen = vap->iv_des_ssid[0].len; 341 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 342 if (vap->iv_bss != NULL) 343 copy_bss(ni, vap->iv_bss); 344 ni->ni_intval = ic->ic_bintval; 345 if (vap->iv_flags & IEEE80211_F_PRIVACY) 346 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 347 if (ic->ic_phytype == IEEE80211_T_FH) { 348 ni->ni_fhdwell = 200; /* XXX */ 349 ni->ni_fhindex = 1; 350 } 351 if (vap->iv_opmode == IEEE80211_M_IBSS) { 352 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 353 if (vap->iv_flags & IEEE80211_F_DESBSSID) 354 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 355 else { 356 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 357 /* clear group bit, add local bit */ 358 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 359 } 360 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 361 if (vap->iv_flags & IEEE80211_F_DESBSSID) 362 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 363 else 364 #ifdef IEEE80211_SUPPORT_TDMA 365 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 366 #endif 367 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 368 #ifdef IEEE80211_SUPPORT_MESH 369 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 370 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 371 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 372 #endif 373 } 374 /* 375 * Fix the channel and related attributes. 376 */ 377 /* clear DFS CAC state on previous channel */ 378 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 379 ic->ic_bsschan->ic_freq != chan->ic_freq && 380 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 381 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 382 ic->ic_bsschan = chan; 383 ieee80211_node_set_chan(ni, chan); 384 ic->ic_curmode = ieee80211_chan2mode(chan); 385 /* 386 * Do mode-specific setup. 387 */ 388 if (IEEE80211_IS_CHAN_FULL(chan)) { 389 if (IEEE80211_IS_CHAN_ANYG(chan)) { 390 /* 391 * Use a mixed 11b/11g basic rate set. 392 */ 393 ieee80211_setbasicrates(&ni->ni_rates, 394 IEEE80211_MODE_11G); 395 if (vap->iv_flags & IEEE80211_F_PUREG) { 396 /* 397 * Also mark OFDM rates basic so 11b 398 * stations do not join (WiFi compliance). 399 */ 400 ieee80211_addbasicrates(&ni->ni_rates, 401 IEEE80211_MODE_11A); 402 } 403 } else if (IEEE80211_IS_CHAN_B(chan)) { 404 /* 405 * Force pure 11b rate set. 406 */ 407 ieee80211_setbasicrates(&ni->ni_rates, 408 IEEE80211_MODE_11B); 409 } 410 } 411 412 /* XXX TODO: other bits and pieces - eg fast-frames? */ 413 414 /* If we're an 11n channel then initialise the 11n bits */ 415 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { 416 /* XXX what else? */ 417 ieee80211_ht_node_init(ni); 418 ieee80211_vht_node_init(ni); 419 } else if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 420 /* XXX what else? */ 421 ieee80211_ht_node_init(ni); 422 } 423 424 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 425 } 426 427 /* 428 * Reset bss state on transition to the INIT state. 429 * Clear any stations from the table (they have been 430 * deauth'd) and reset the bss node (clears key, rate 431 * etc. state). 432 */ 433 void 434 ieee80211_reset_bss(struct ieee80211vap *vap) 435 { 436 struct ieee80211com *ic = vap->iv_ic; 437 struct ieee80211_node *ni, *obss; 438 439 ieee80211_node_table_reset(&ic->ic_sta, vap); 440 /* XXX multi-bss: wrong */ 441 ieee80211_reset_erp(ic); 442 443 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 444 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 445 obss = vap->iv_bss; 446 vap->iv_bss = ieee80211_ref_node(ni); 447 if (obss != NULL) { 448 copy_bss(ni, obss); 449 ni->ni_intval = ic->ic_bintval; 450 ieee80211_free_node(obss); 451 } else 452 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 453 } 454 455 static int 456 match_ssid(const struct ieee80211_node *ni, 457 int nssid, const struct ieee80211_scan_ssid ssids[]) 458 { 459 int i; 460 461 for (i = 0; i < nssid; i++) { 462 if (ni->ni_esslen == ssids[i].len && 463 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 464 return 1; 465 } 466 return 0; 467 } 468 469 /* 470 * Test a node for suitability/compatibility. 471 */ 472 static int 473 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 474 { 475 struct ieee80211com *ic = ni->ni_ic; 476 uint8_t rate; 477 478 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 479 return 0; 480 if (vap->iv_opmode == IEEE80211_M_IBSS) { 481 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 482 return 0; 483 } else { 484 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 485 return 0; 486 } 487 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 488 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 489 return 0; 490 } else { 491 /* XXX does this mean privacy is supported or required? */ 492 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 493 return 0; 494 } 495 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 496 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 497 if (rate & IEEE80211_RATE_BASIC) 498 return 0; 499 if (vap->iv_des_nssid != 0 && 500 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 501 return 0; 502 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 503 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 504 return 0; 505 return 1; 506 } 507 508 #ifdef IEEE80211_DEBUG 509 /* 510 * Display node suitability/compatibility. 511 */ 512 static void 513 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 514 { 515 struct ieee80211com *ic = ni->ni_ic; 516 uint8_t rate; 517 int fail; 518 519 fail = 0; 520 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 521 fail |= 0x01; 522 if (vap->iv_opmode == IEEE80211_M_IBSS) { 523 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 524 fail |= 0x02; 525 } else { 526 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 527 fail |= 0x02; 528 } 529 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 530 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 531 fail |= 0x04; 532 } else { 533 /* XXX does this mean privacy is supported or required? */ 534 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 535 fail |= 0x04; 536 } 537 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 538 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 539 if (rate & IEEE80211_RATE_BASIC) 540 fail |= 0x08; 541 if (vap->iv_des_nssid != 0 && 542 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 543 fail |= 0x10; 544 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 545 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 546 fail |= 0x20; 547 548 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 549 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 550 printf(" %3d%c", 551 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 552 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 553 fail & 0x08 ? '!' : ' '); 554 printf(" %4s%c", 555 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 556 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 557 "????", 558 fail & 0x02 ? '!' : ' '); 559 printf(" %3s%c ", 560 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 561 fail & 0x04 ? '!' : ' '); 562 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 563 printf("%s\n", fail & 0x10 ? "!" : ""); 564 } 565 #endif /* IEEE80211_DEBUG */ 566 567 568 int 569 ieee80211_ibss_merge_check(struct ieee80211_node *ni) 570 { 571 struct ieee80211vap *vap = ni->ni_vap; 572 573 if (ni == vap->iv_bss || 574 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 575 /* unchanged, nothing to do */ 576 return 0; 577 } 578 579 if (!check_bss(vap, ni)) { 580 /* capabilities mismatch */ 581 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 582 "%s: merge failed, capabilities mismatch\n", __func__); 583 #ifdef IEEE80211_DEBUG 584 if (ieee80211_msg_assoc(vap)) 585 check_bss_debug(vap, ni); 586 #endif 587 vap->iv_stats.is_ibss_capmismatch++; 588 return 0; 589 } 590 591 return 1; 592 } 593 594 /* 595 * Check if the given node should populate the node table. 596 * 597 * We need to be in "see all beacons for all ssids" mode in order 598 * to do IBSS merges, however this means we will populate nodes for 599 * /all/ IBSS SSIDs, versus just the one we care about. 600 * 601 * So this check ensures the node can actually belong to our IBSS 602 * configuration. For now it simply checks the SSID. 603 */ 604 int 605 ieee80211_ibss_node_check_new(struct ieee80211_node *ni, 606 const struct ieee80211_scanparams *scan) 607 { 608 struct ieee80211vap *vap = ni->ni_vap; 609 int i; 610 611 /* 612 * If we have no SSID and no scan SSID, return OK. 613 */ 614 if (vap->iv_des_nssid == 0 && scan->ssid == NULL) 615 goto ok; 616 617 /* 618 * If we have one of (SSID, scan SSID) then return error. 619 */ 620 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL)) 621 goto mismatch; 622 623 /* 624 * Double-check - we need scan SSID. 625 */ 626 if (scan->ssid == NULL) 627 goto mismatch; 628 629 /* 630 * Check if the scan SSID matches the SSID list for the VAP. 631 */ 632 for (i = 0; i < vap->iv_des_nssid; i++) { 633 634 /* Sanity length check */ 635 if (vap->iv_des_ssid[i].len != scan->ssid[1]) 636 continue; 637 638 /* Note: SSID in the scan entry is the IE format */ 639 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2, 640 vap->iv_des_ssid[i].len) == 0) 641 goto ok; 642 } 643 644 mismatch: 645 return (0); 646 ok: 647 return (1); 648 } 649 650 /* 651 * Handle 802.11 ad hoc network merge. The 652 * convention, set by the Wireless Ethernet Compatibility Alliance 653 * (WECA), is that an 802.11 station will change its BSSID to match 654 * the "oldest" 802.11 ad hoc network, on the same channel, that 655 * has the station's desired SSID. The "oldest" 802.11 network 656 * sends beacons with the greatest TSF timestamp. 657 * 658 * The caller is assumed to validate TSF's before attempting a merge. 659 * 660 * Return !0 if the BSSID changed, 0 otherwise. 661 */ 662 int 663 ieee80211_ibss_merge(struct ieee80211_node *ni) 664 { 665 #ifdef IEEE80211_DEBUG 666 struct ieee80211vap *vap = ni->ni_vap; 667 struct ieee80211com *ic = ni->ni_ic; 668 #endif 669 670 if (! ieee80211_ibss_merge_check(ni)) 671 return 0; 672 673 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 674 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 675 ether_sprintf(ni->ni_bssid), 676 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 677 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 678 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 679 ); 680 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 681 } 682 683 /* 684 * Calculate HT channel promotion flags for all vaps. 685 * This assumes ni_chan have been setup for each vap. 686 */ 687 static int 688 gethtadjustflags(struct ieee80211com *ic) 689 { 690 struct ieee80211vap *vap; 691 int flags; 692 693 flags = 0; 694 /* XXX locking */ 695 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 696 if (vap->iv_state < IEEE80211_S_RUN) 697 continue; 698 switch (vap->iv_opmode) { 699 case IEEE80211_M_WDS: 700 case IEEE80211_M_STA: 701 case IEEE80211_M_AHDEMO: 702 case IEEE80211_M_HOSTAP: 703 case IEEE80211_M_IBSS: 704 case IEEE80211_M_MBSS: 705 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 706 break; 707 default: 708 break; 709 } 710 } 711 return flags; 712 } 713 714 /* 715 * Calculate VHT channel promotion flags for all vaps. 716 * This assumes ni_chan have been setup for each vap. 717 */ 718 static int 719 getvhtadjustflags(struct ieee80211com *ic) 720 { 721 struct ieee80211vap *vap; 722 int flags; 723 724 flags = 0; 725 /* XXX locking */ 726 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 727 if (vap->iv_state < IEEE80211_S_RUN) 728 continue; 729 switch (vap->iv_opmode) { 730 case IEEE80211_M_WDS: 731 case IEEE80211_M_STA: 732 case IEEE80211_M_AHDEMO: 733 case IEEE80211_M_HOSTAP: 734 case IEEE80211_M_IBSS: 735 case IEEE80211_M_MBSS: 736 flags |= ieee80211_vhtchanflags(vap->iv_bss->ni_chan); 737 break; 738 default: 739 break; 740 } 741 } 742 return flags; 743 } 744 745 /* 746 * Check if the current channel needs to change based on whether 747 * any vap's are using HT20/HT40. This is used to sync the state 748 * of ic_curchan after a channel width change on a running vap. 749 * 750 * Same applies for VHT. 751 */ 752 void 753 ieee80211_sync_curchan(struct ieee80211com *ic) 754 { 755 struct ieee80211_channel *c; 756 757 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 758 c = ieee80211_vht_adjust_channel(ic, c, getvhtadjustflags(ic)); 759 760 if (c != ic->ic_curchan) { 761 ic->ic_curchan = c; 762 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 763 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 764 IEEE80211_UNLOCK(ic); 765 ic->ic_set_channel(ic); 766 ieee80211_radiotap_chan_change(ic); 767 IEEE80211_LOCK(ic); 768 } 769 } 770 771 /* 772 * Setup the current channel. The request channel may be 773 * promoted if other vap's are operating with HT20/HT40. 774 */ 775 void 776 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 777 { 778 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 779 int flags = gethtadjustflags(ic); 780 /* 781 * Check for channel promotion required to support the 782 * set of running vap's. This assumes we are called 783 * after ni_chan is setup for each vap. 784 */ 785 /* XXX VHT? */ 786 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 787 if (flags > ieee80211_htchanflags(c)) 788 c = ieee80211_ht_adjust_channel(ic, c, flags); 789 } 790 791 /* 792 * VHT promotion - this will at least promote to VHT20/40 793 * based on what HT has done; it may further promote the 794 * channel to VHT80 or above. 795 */ 796 if (ic->ic_vhtcaps != 0) { 797 int flags = getvhtadjustflags(ic); 798 if (flags > ieee80211_vhtchanflags(c)) 799 c = ieee80211_vht_adjust_channel(ic, c, flags); 800 } 801 802 ic->ic_bsschan = ic->ic_curchan = c; 803 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 804 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 805 } 806 807 /* 808 * Change the current channel. The channel change is guaranteed to have 809 * happened before the next state change. 810 */ 811 void 812 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 813 { 814 ieee80211_setupcurchan(ic, c); 815 ieee80211_runtask(ic, &ic->ic_chan_task); 816 } 817 818 void 819 ieee80211_update_chw(struct ieee80211com *ic) 820 { 821 822 ieee80211_setupcurchan(ic, ic->ic_curchan); 823 ieee80211_runtask(ic, &ic->ic_chw_task); 824 } 825 826 /* 827 * Join the specified IBSS/BSS network. The node is assumed to 828 * be passed in with a held reference. 829 */ 830 static int 831 ieee80211_sta_join1(struct ieee80211_node *selbs) 832 { 833 struct ieee80211vap *vap = selbs->ni_vap; 834 struct ieee80211com *ic = selbs->ni_ic; 835 struct ieee80211_node *obss; 836 int canreassoc; 837 838 /* 839 * Committed to selbs, setup state. 840 */ 841 obss = vap->iv_bss; 842 /* 843 * Check if old+new node have the same address in which 844 * case we can reassociate when operating in sta mode. 845 */ 846 canreassoc = (obss != NULL && 847 vap->iv_state == IEEE80211_S_RUN && 848 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 849 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 850 if (obss != NULL) { 851 struct ieee80211_node_table *nt = obss->ni_table; 852 853 copy_bss(selbs, obss); 854 ieee80211_node_decref(obss); /* iv_bss reference */ 855 856 IEEE80211_NODE_LOCK(nt); 857 node_reclaim(nt, obss); /* station table reference */ 858 IEEE80211_NODE_UNLOCK(nt); 859 860 obss = NULL; /* NB: guard against later use */ 861 } 862 863 /* 864 * Delete unusable rates; we've already checked 865 * that the negotiated rate set is acceptable. 866 */ 867 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 868 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 869 870 ieee80211_setcurchan(ic, selbs->ni_chan); 871 /* 872 * Set the erp state (mostly the slot time) to deal with 873 * the auto-select case; this should be redundant if the 874 * mode is locked. 875 */ 876 ieee80211_reset_erp(ic); 877 ieee80211_wme_initparams(vap); 878 879 if (vap->iv_opmode == IEEE80211_M_STA) { 880 if (canreassoc) { 881 /* Reassociate */ 882 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 883 } else { 884 /* 885 * Act as if we received a DEAUTH frame in case we 886 * are invoked from the RUN state. This will cause 887 * us to try to re-authenticate if we are operating 888 * as a station. 889 */ 890 ieee80211_new_state(vap, IEEE80211_S_AUTH, 891 IEEE80211_FC0_SUBTYPE_DEAUTH); 892 } 893 } else 894 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 895 return 1; 896 } 897 898 int 899 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 900 const struct ieee80211_scan_entry *se) 901 { 902 struct ieee80211com *ic = vap->iv_ic; 903 struct ieee80211_node *ni; 904 int do_ht = 0; 905 906 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 907 if (ni == NULL) { 908 /* XXX msg */ 909 return 0; 910 } 911 912 /* 913 * Expand scan state into node's format. 914 * XXX may not need all this stuff 915 */ 916 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 917 ni->ni_esslen = se->se_ssid[1]; 918 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 919 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 920 ni->ni_intval = se->se_intval; 921 ni->ni_capinfo = se->se_capinfo; 922 ni->ni_chan = chan; 923 ni->ni_timoff = se->se_timoff; 924 ni->ni_fhdwell = se->se_fhdwell; 925 ni->ni_fhindex = se->se_fhindex; 926 ni->ni_erp = se->se_erp; 927 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 928 ni->ni_noise = se->se_noise; 929 if (vap->iv_opmode == IEEE80211_M_STA) { 930 /* NB: only infrastructure mode requires an associd */ 931 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 932 } 933 934 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 935 ieee80211_ies_expand(&ni->ni_ies); 936 #ifdef IEEE80211_SUPPORT_SUPERG 937 if (ni->ni_ies.ath_ie != NULL) 938 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 939 #endif 940 if (ni->ni_ies.htcap_ie != NULL) 941 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 942 if (ni->ni_ies.htinfo_ie != NULL) 943 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 944 #ifdef IEEE80211_SUPPORT_MESH 945 if (ni->ni_ies.meshid_ie != NULL) 946 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 947 #endif 948 #ifdef IEEE80211_SUPPORT_TDMA 949 if (ni->ni_ies.tdma_ie != NULL) 950 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 951 #endif 952 if (ni->ni_ies.vhtcap_ie != NULL) 953 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 954 if (ni->ni_ies.vhtopmode_ie != NULL) 955 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 956 957 /* XXX parse BSSLOAD IE */ 958 /* XXX parse TXPWRENV IE */ 959 /* XXX parse APCHANREP IE */ 960 } 961 962 vap->iv_dtim_period = se->se_dtimperiod; 963 vap->iv_dtim_count = 0; 964 965 /* NB: must be after ni_chan is setup */ 966 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 967 IEEE80211_F_DOSORT); 968 if (ieee80211_iserp_rateset(&ni->ni_rates)) 969 ni->ni_flags |= IEEE80211_NODE_ERP; 970 971 /* 972 * Setup HT state for this node if it's available, otherwise 973 * non-STA modes won't pick this state up. 974 * 975 * For IBSS and related modes that don't go through an 976 * association request/response, the only appropriate place 977 * to setup the HT state is here. 978 */ 979 if (ni->ni_ies.htinfo_ie != NULL && 980 ni->ni_ies.htcap_ie != NULL && 981 vap->iv_flags_ht & IEEE80211_FHT_HT) { 982 ieee80211_ht_node_init(ni); 983 ieee80211_ht_updateparams(ni, 984 ni->ni_ies.htcap_ie, 985 ni->ni_ies.htinfo_ie); 986 do_ht = 1; 987 } 988 989 /* 990 * Setup VHT state for this node if it's available. 991 * Same as the above. 992 * 993 * For now, don't allow 2GHz VHT operation. 994 */ 995 if (ni->ni_ies.vhtopmode_ie != NULL && 996 ni->ni_ies.vhtcap_ie != NULL && 997 vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 998 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 999 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1000 __func__, 1001 ni->ni_macaddr, 1002 ":"); 1003 } else { 1004 ieee80211_vht_node_init(ni); 1005 ieee80211_vht_updateparams(ni, 1006 ni->ni_ies.vhtcap_ie, 1007 ni->ni_ies.vhtopmode_ie); 1008 ieee80211_setup_vht_rates(ni, ni->ni_ies.vhtcap_ie, 1009 ni->ni_ies.vhtopmode_ie); 1010 do_ht = 1; 1011 } 1012 } 1013 1014 /* Finally do the node channel change */ 1015 if (do_ht) { 1016 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1017 ni->ni_ies.htinfo_ie); 1018 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 1019 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1020 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 1021 } 1022 1023 /* XXX else check for ath FF? */ 1024 /* XXX QoS? Difficult given that WME config is specific to a master */ 1025 1026 ieee80211_node_setuptxparms(ni); 1027 ieee80211_ratectl_node_init(ni); 1028 1029 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 1030 } 1031 1032 /* 1033 * Leave the specified IBSS/BSS network. The node is assumed to 1034 * be passed in with a held reference. 1035 */ 1036 void 1037 ieee80211_sta_leave(struct ieee80211_node *ni) 1038 { 1039 struct ieee80211com *ic = ni->ni_ic; 1040 1041 ic->ic_node_cleanup(ni); 1042 ieee80211_notify_node_leave(ni); 1043 } 1044 1045 /* 1046 * Send a deauthenticate frame and drop the station. 1047 */ 1048 void 1049 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 1050 { 1051 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 1052 ieee80211_ref_node(ni); 1053 if (ni->ni_associd != 0) 1054 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 1055 ieee80211_node_leave(ni); 1056 ieee80211_free_node(ni); 1057 } 1058 1059 static struct ieee80211_node * 1060 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1061 { 1062 struct ieee80211_node *ni; 1063 1064 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), 1065 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1066 return ni; 1067 } 1068 1069 /* 1070 * Initialize an ie blob with the specified data. If previous 1071 * data exists re-use the data block. As a side effect we clear 1072 * all references to specific ie's; the caller is required to 1073 * recalculate them. 1074 */ 1075 int 1076 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 1077 { 1078 /* NB: assumes data+len are the last fields */ 1079 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 1080 if (ies->data != NULL && ies->len != len) { 1081 /* data size changed */ 1082 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1083 ies->data = NULL; 1084 } 1085 if (ies->data == NULL) { 1086 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 1087 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1088 if (ies->data == NULL) { 1089 ies->len = 0; 1090 /* NB: pointers have already been zero'd above */ 1091 return 0; 1092 } 1093 } 1094 memcpy(ies->data, data, len); 1095 ies->len = len; 1096 return 1; 1097 } 1098 1099 /* 1100 * Reclaim storage for an ie blob. 1101 */ 1102 void 1103 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 1104 { 1105 if (ies->data != NULL) 1106 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1107 } 1108 1109 /* 1110 * Expand an ie blob data contents and to fillin individual 1111 * ie pointers. The data blob is assumed to be well-formed; 1112 * we don't do any validity checking of ie lengths. 1113 */ 1114 void 1115 ieee80211_ies_expand(struct ieee80211_ies *ies) 1116 { 1117 uint8_t *ie; 1118 int ielen; 1119 1120 ie = ies->data; 1121 ielen = ies->len; 1122 while (ielen > 0) { 1123 switch (ie[0]) { 1124 case IEEE80211_ELEMID_VENDOR: 1125 if (iswpaoui(ie)) 1126 ies->wpa_ie = ie; 1127 else if (iswmeoui(ie)) 1128 ies->wme_ie = ie; 1129 #ifdef IEEE80211_SUPPORT_SUPERG 1130 else if (isatherosoui(ie)) 1131 ies->ath_ie = ie; 1132 #endif 1133 #ifdef IEEE80211_SUPPORT_TDMA 1134 else if (istdmaoui(ie)) 1135 ies->tdma_ie = ie; 1136 #endif 1137 break; 1138 case IEEE80211_ELEMID_RSN: 1139 ies->rsn_ie = ie; 1140 break; 1141 case IEEE80211_ELEMID_HTCAP: 1142 ies->htcap_ie = ie; 1143 break; 1144 case IEEE80211_ELEMID_HTINFO: 1145 ies->htinfo_ie = ie; 1146 break; 1147 #ifdef IEEE80211_SUPPORT_MESH 1148 case IEEE80211_ELEMID_MESHID: 1149 ies->meshid_ie = ie; 1150 break; 1151 #endif 1152 case IEEE80211_ELEMID_VHT_CAP: 1153 ies->vhtcap_ie = ie; 1154 break; 1155 case IEEE80211_ELEMID_VHT_OPMODE: 1156 ies->vhtopmode_ie = ie; 1157 break; 1158 case IEEE80211_ELEMID_VHT_PWR_ENV: 1159 ies->vhtpwrenv_ie = ie; 1160 break; 1161 case IEEE80211_ELEMID_BSSLOAD: 1162 ies->bssload_ie = ie; 1163 break; 1164 case IEEE80211_ELEMID_APCHANREP: 1165 ies->apchanrep_ie = ie; 1166 break; 1167 } 1168 ielen -= 2 + ie[1]; 1169 ie += 2 + ie[1]; 1170 } 1171 } 1172 1173 /* 1174 * Reclaim any resources in a node and reset any critical 1175 * state. Typically nodes are free'd immediately after, 1176 * but in some cases the storage may be reused so we need 1177 * to insure consistent state (should probably fix that). 1178 */ 1179 static void 1180 node_cleanup(struct ieee80211_node *ni) 1181 { 1182 struct ieee80211vap *vap = ni->ni_vap; 1183 struct ieee80211com *ic = ni->ni_ic; 1184 int i; 1185 1186 /* NB: preserve ni_table */ 1187 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1188 if (vap->iv_opmode != IEEE80211_M_STA) 1189 vap->iv_ps_sta--; 1190 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1191 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1192 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1193 } 1194 /* 1195 * Cleanup any VHT and HT-related state. 1196 */ 1197 if (ni->ni_flags & IEEE80211_NODE_VHT) 1198 ieee80211_vht_node_cleanup(ni); 1199 if (ni->ni_flags & IEEE80211_NODE_HT) 1200 ieee80211_ht_node_cleanup(ni); 1201 #ifdef IEEE80211_SUPPORT_SUPERG 1202 /* Always do FF node cleanup; for A-MSDU */ 1203 ieee80211_ff_node_cleanup(ni); 1204 #endif 1205 #ifdef IEEE80211_SUPPORT_MESH 1206 /* 1207 * Cleanup any mesh-related state. 1208 */ 1209 if (vap->iv_opmode == IEEE80211_M_MBSS) 1210 ieee80211_mesh_node_cleanup(ni); 1211 #endif 1212 /* 1213 * Clear any staging queue entries. 1214 */ 1215 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1216 1217 /* 1218 * Clear AREF flag that marks the authorization refcnt bump 1219 * has happened. This is probably not needed as the node 1220 * should always be removed from the table so not found but 1221 * do it just in case. 1222 * Likewise clear the ASSOCID flag as these flags are intended 1223 * to be managed in tandem. 1224 */ 1225 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1226 1227 /* 1228 * Drain power save queue and, if needed, clear TIM. 1229 */ 1230 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1231 vap->iv_set_tim(ni, 0); 1232 1233 ni->ni_associd = 0; 1234 if (ni->ni_challenge != NULL) { 1235 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1236 ni->ni_challenge = NULL; 1237 } 1238 /* 1239 * Preserve SSID, WPA, and WME ie's so the bss node is 1240 * reusable during a re-auth/re-assoc state transition. 1241 * If we remove these data they will not be recreated 1242 * because they come from a probe-response or beacon frame 1243 * which cannot be expected prior to the association-response. 1244 * This should not be an issue when operating in other modes 1245 * as stations leaving always go through a full state transition 1246 * which will rebuild this state. 1247 * 1248 * XXX does this leave us open to inheriting old state? 1249 */ 1250 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1251 if (ni->ni_rxfrag[i] != NULL) { 1252 m_freem(ni->ni_rxfrag[i]); 1253 ni->ni_rxfrag[i] = NULL; 1254 } 1255 /* 1256 * Must be careful here to remove any key map entry w/o a LOR. 1257 */ 1258 ieee80211_node_delucastkey(ni); 1259 } 1260 1261 static void 1262 node_free(struct ieee80211_node *ni) 1263 { 1264 struct ieee80211com *ic = ni->ni_ic; 1265 1266 ieee80211_ratectl_node_deinit(ni); 1267 ic->ic_node_cleanup(ni); 1268 ieee80211_ies_cleanup(&ni->ni_ies); 1269 ieee80211_psq_cleanup(&ni->ni_psq); 1270 IEEE80211_FREE(ni, M_80211_NODE); 1271 } 1272 1273 static void 1274 node_age(struct ieee80211_node *ni) 1275 { 1276 struct ieee80211vap *vap = ni->ni_vap; 1277 1278 /* 1279 * Age frames on the power save queue. 1280 */ 1281 if (ieee80211_node_psq_age(ni) != 0 && 1282 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1283 vap->iv_set_tim(ni, 0); 1284 /* 1285 * Age out HT resources (e.g. frames on the 1286 * A-MPDU reorder queues). 1287 */ 1288 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1289 ieee80211_ht_node_age(ni); 1290 } 1291 1292 static int8_t 1293 node_getrssi(const struct ieee80211_node *ni) 1294 { 1295 uint32_t avgrssi = ni->ni_avgrssi; 1296 int32_t rssi; 1297 1298 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1299 return 0; 1300 rssi = IEEE80211_RSSI_GET(avgrssi); 1301 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1302 } 1303 1304 static void 1305 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1306 { 1307 *rssi = node_getrssi(ni); 1308 *noise = ni->ni_noise; 1309 } 1310 1311 static void 1312 node_getmimoinfo(const struct ieee80211_node *ni, 1313 struct ieee80211_mimo_info *info) 1314 { 1315 int i; 1316 uint32_t avgrssi; 1317 int32_t rssi; 1318 1319 bzero(info, sizeof(*info)); 1320 1321 for (i = 0; i < MIN(IEEE80211_MAX_CHAINS, ni->ni_mimo_chains); i++) { 1322 /* Note: for now, just pri20 channel info */ 1323 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1324 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1325 info->ch[i].rssi[0] = 0; 1326 } else { 1327 rssi = IEEE80211_RSSI_GET(avgrssi); 1328 info->ch[i].rssi[0] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1329 } 1330 info->ch[i].noise[0] = ni->ni_mimo_noise_ctl[i]; 1331 } 1332 1333 /* XXX ext radios? */ 1334 1335 /* XXX EVM? */ 1336 } 1337 1338 static void 1339 ieee80211_add_node_nt(struct ieee80211_node_table *nt, 1340 struct ieee80211_node *ni) 1341 { 1342 struct ieee80211com *ic = nt->nt_ic; 1343 int hash; 1344 1345 IEEE80211_NODE_LOCK_ASSERT(nt); 1346 1347 hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr); 1348 (void) ic; /* XXX IEEE80211_NODE_HASH */ 1349 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1350 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1351 nt->nt_count++; 1352 ni->ni_table = nt; 1353 } 1354 1355 static void 1356 ieee80211_del_node_nt(struct ieee80211_node_table *nt, 1357 struct ieee80211_node *ni) 1358 { 1359 1360 IEEE80211_NODE_LOCK_ASSERT(nt); 1361 1362 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1363 LIST_REMOVE(ni, ni_hash); 1364 nt->nt_count--; 1365 KASSERT(nt->nt_count >= 0, 1366 ("nt_count is negative (%d)!\n", nt->nt_count)); 1367 ni->ni_table = NULL; 1368 } 1369 1370 struct ieee80211_node * 1371 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1372 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1373 { 1374 struct ieee80211com *ic = nt->nt_ic; 1375 struct ieee80211_node *ni; 1376 1377 ni = ic->ic_node_alloc(vap, macaddr); 1378 if (ni == NULL) { 1379 vap->iv_stats.is_rx_nodealloc++; 1380 return NULL; 1381 } 1382 1383 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1384 "%s %p<%s> in %s table\n", __func__, ni, 1385 ether_sprintf(macaddr), nt->nt_name); 1386 1387 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1388 ieee80211_node_initref(ni); /* mark referenced */ 1389 ni->ni_chan = IEEE80211_CHAN_ANYC; 1390 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1391 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1392 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1393 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1394 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1395 ni->ni_inact_reload = nt->nt_inact_init; 1396 ni->ni_inact = ni->ni_inact_reload; 1397 ni->ni_ath_defkeyix = 0x7fff; 1398 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1399 #ifdef IEEE80211_SUPPORT_MESH 1400 if (vap->iv_opmode == IEEE80211_M_MBSS) 1401 ieee80211_mesh_node_init(vap, ni); 1402 #endif 1403 IEEE80211_NODE_LOCK(nt); 1404 ieee80211_add_node_nt(nt, ni); 1405 ni->ni_vap = vap; 1406 ni->ni_ic = ic; 1407 IEEE80211_NODE_UNLOCK(nt); 1408 1409 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1410 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1411 1412 ieee80211_ratectl_node_init(ni); 1413 1414 return ni; 1415 } 1416 1417 /* 1418 * Craft a temporary node suitable for sending a management frame 1419 * to the specified station. We craft only as much state as we 1420 * need to do the work since the node will be immediately reclaimed 1421 * once the send completes. 1422 */ 1423 struct ieee80211_node * 1424 ieee80211_tmp_node(struct ieee80211vap *vap, 1425 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1426 { 1427 struct ieee80211com *ic = vap->iv_ic; 1428 struct ieee80211_node *ni; 1429 1430 ni = ic->ic_node_alloc(vap, macaddr); 1431 if (ni != NULL) { 1432 struct ieee80211_node *bss = vap->iv_bss; 1433 1434 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1435 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1436 1437 ni->ni_table = NULL; /* NB: pedantic */ 1438 ni->ni_ic = ic; /* NB: needed to set channel */ 1439 ni->ni_vap = vap; 1440 1441 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1442 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1443 ieee80211_node_initref(ni); /* mark referenced */ 1444 /* NB: required by ieee80211_fix_rate */ 1445 ieee80211_node_set_chan(ni, bss->ni_chan); 1446 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1447 IEEE80211_KEYIX_NONE); 1448 ni->ni_txpower = bss->ni_txpower; 1449 /* XXX optimize away */ 1450 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1451 1452 ieee80211_ratectl_node_init(ni); 1453 } else { 1454 /* XXX msg */ 1455 vap->iv_stats.is_rx_nodealloc++; 1456 } 1457 return ni; 1458 } 1459 1460 struct ieee80211_node * 1461 ieee80211_dup_bss(struct ieee80211vap *vap, 1462 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1463 { 1464 struct ieee80211com *ic = vap->iv_ic; 1465 struct ieee80211_node *ni; 1466 1467 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1468 if (ni != NULL) { 1469 struct ieee80211_node *bss = vap->iv_bss; 1470 /* 1471 * Inherit from iv_bss. 1472 */ 1473 copy_bss(ni, bss); 1474 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1475 ieee80211_node_set_chan(ni, bss->ni_chan); 1476 } 1477 return ni; 1478 } 1479 1480 /* 1481 * Create a bss node for a legacy WDS vap. The far end does 1482 * not associate so we just create create a new node and 1483 * simulate an association. The caller is responsible for 1484 * installing the node as the bss node and handling any further 1485 * setup work like authorizing the port. 1486 */ 1487 struct ieee80211_node * 1488 ieee80211_node_create_wds(struct ieee80211vap *vap, 1489 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1490 { 1491 struct ieee80211com *ic = vap->iv_ic; 1492 struct ieee80211_node *ni; 1493 1494 /* XXX check if node already in sta table? */ 1495 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1496 if (ni != NULL) { 1497 ni->ni_wdsvap = vap; 1498 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1499 /* 1500 * Inherit any manually configured settings. 1501 */ 1502 copy_bss(ni, vap->iv_bss); 1503 ieee80211_node_set_chan(ni, chan); 1504 /* NB: propagate ssid so available to WPA supplicant */ 1505 ni->ni_esslen = vap->iv_des_ssid[0].len; 1506 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1507 /* NB: no associd for peer */ 1508 /* 1509 * There are no management frames to use to 1510 * discover neighbor capabilities, so blindly 1511 * propagate the local configuration. 1512 */ 1513 if (vap->iv_flags & IEEE80211_F_WME) 1514 ni->ni_flags |= IEEE80211_NODE_QOS; 1515 #ifdef IEEE80211_SUPPORT_SUPERG 1516 if (vap->iv_flags & IEEE80211_F_FF) 1517 ni->ni_flags |= IEEE80211_NODE_FF; 1518 #endif 1519 /* XXX VHT */ 1520 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1521 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1522 /* 1523 * Device is HT-capable and HT is enabled for 1524 * the vap; setup HT operation. On return 1525 * ni_chan will be adjusted to an HT channel. 1526 */ 1527 ieee80211_ht_wds_init(ni); 1528 if (vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1529 printf("%s: TODO: vht_wds_init\n", __func__); 1530 } 1531 } else { 1532 struct ieee80211_channel *c = ni->ni_chan; 1533 /* 1534 * Force a legacy channel to be used. 1535 */ 1536 c = ieee80211_find_channel(ic, 1537 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1538 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1539 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1540 ni->ni_chan = c; 1541 } 1542 } 1543 return ni; 1544 } 1545 1546 struct ieee80211_node * 1547 #ifdef IEEE80211_DEBUG_REFCNT 1548 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1549 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1550 #else 1551 ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1552 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1553 #endif 1554 { 1555 struct ieee80211_node *ni; 1556 int hash; 1557 1558 IEEE80211_NODE_LOCK_ASSERT(nt); 1559 1560 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1561 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1562 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1563 ieee80211_ref_node(ni); /* mark referenced */ 1564 #ifdef IEEE80211_DEBUG_REFCNT 1565 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1566 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1567 func, line, 1568 ni, ether_sprintf(ni->ni_macaddr), 1569 ieee80211_node_refcnt(ni)); 1570 #endif 1571 return ni; 1572 } 1573 } 1574 return NULL; 1575 } 1576 1577 struct ieee80211_node * 1578 #ifdef IEEE80211_DEBUG_REFCNT 1579 ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1580 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1581 #else 1582 ieee80211_find_node(struct ieee80211_node_table *nt, 1583 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1584 #endif 1585 { 1586 struct ieee80211_node *ni; 1587 1588 IEEE80211_NODE_LOCK(nt); 1589 ni = ieee80211_find_node_locked(nt, macaddr); 1590 IEEE80211_NODE_UNLOCK(nt); 1591 return ni; 1592 } 1593 1594 struct ieee80211_node * 1595 #ifdef IEEE80211_DEBUG_REFCNT 1596 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1597 const struct ieee80211vap *vap, 1598 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1599 #else 1600 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1601 const struct ieee80211vap *vap, 1602 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1603 #endif 1604 { 1605 struct ieee80211_node *ni; 1606 int hash; 1607 1608 IEEE80211_NODE_LOCK_ASSERT(nt); 1609 1610 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1611 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1612 if (ni->ni_vap == vap && 1613 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1614 ieee80211_ref_node(ni); /* mark referenced */ 1615 #ifdef IEEE80211_DEBUG_REFCNT 1616 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1617 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1618 func, line, 1619 ni, ether_sprintf(ni->ni_macaddr), 1620 ieee80211_node_refcnt(ni)); 1621 #endif 1622 return ni; 1623 } 1624 } 1625 return NULL; 1626 } 1627 1628 struct ieee80211_node * 1629 #ifdef IEEE80211_DEBUG_REFCNT 1630 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1631 const struct ieee80211vap *vap, 1632 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1633 #else 1634 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1635 const struct ieee80211vap *vap, 1636 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1637 #endif 1638 { 1639 struct ieee80211_node *ni; 1640 1641 IEEE80211_NODE_LOCK(nt); 1642 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1643 IEEE80211_NODE_UNLOCK(nt); 1644 return ni; 1645 } 1646 1647 /* 1648 * Fake up a node; this handles node discovery in adhoc mode. 1649 * Note that for the driver's benefit we we treat this like 1650 * an association so the driver has an opportunity to setup 1651 * it's private state. 1652 */ 1653 struct ieee80211_node * 1654 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1655 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1656 { 1657 struct ieee80211_node *ni; 1658 1659 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1660 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1661 ni = ieee80211_dup_bss(vap, macaddr); 1662 if (ni != NULL) { 1663 struct ieee80211com *ic = vap->iv_ic; 1664 1665 /* XXX no rate negotiation; just dup */ 1666 ni->ni_rates = vap->iv_bss->ni_rates; 1667 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1668 ni->ni_flags |= IEEE80211_NODE_ERP; 1669 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1670 /* 1671 * In adhoc demo mode there are no management 1672 * frames to use to discover neighbor capabilities, 1673 * so blindly propagate the local configuration 1674 * so we can do interesting things (e.g. use 1675 * WME to disable ACK's). 1676 */ 1677 /* 1678 * XXX TODO: 11n? 1679 */ 1680 if (vap->iv_flags & IEEE80211_F_WME) 1681 ni->ni_flags |= IEEE80211_NODE_QOS; 1682 #ifdef IEEE80211_SUPPORT_SUPERG 1683 if (vap->iv_flags & IEEE80211_F_FF) 1684 ni->ni_flags |= IEEE80211_NODE_FF; 1685 #endif 1686 } 1687 ieee80211_node_setuptxparms(ni); 1688 ieee80211_ratectl_node_init(ni); 1689 1690 /* 1691 * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX, 1692 * not A-MPDU TX; not 11n rates, etc. We'll cycle 1693 * that after we hear that we can indeed do 11n 1694 * (either by a beacon frame or by a probe response.) 1695 */ 1696 1697 /* 1698 * This is the first time we see the node. 1699 */ 1700 if (ic->ic_newassoc != NULL) 1701 ic->ic_newassoc(ni, 1); 1702 1703 /* 1704 * Kick off a probe request to the given node; 1705 * we will then use the probe response to update 1706 * 11n/etc configuration state. 1707 * 1708 * XXX TODO: this isn't guaranteed, and until we get 1709 * a probe response, we won't be able to actually 1710 * do anything 802.11n related to the node. 1711 * So if this does indeed work, maybe we should hold 1712 * off on sending responses until we get the probe 1713 * response, or just default to some sensible subset 1714 * of 802.11n behaviour (eg always allow aggregation 1715 * negotiation TO us, but not FROM us, etc) so we 1716 * aren't entirely busted. 1717 */ 1718 if (vap->iv_opmode == IEEE80211_M_IBSS) { 1719 ieee80211_send_probereq(ni, /* node */ 1720 vap->iv_myaddr, /* SA */ 1721 ni->ni_macaddr, /* DA */ 1722 vap->iv_bss->ni_bssid, /* BSSID */ 1723 vap->iv_bss->ni_essid, 1724 vap->iv_bss->ni_esslen); /* SSID */ 1725 } 1726 1727 /* XXX not right for 802.1x/WPA */ 1728 ieee80211_node_authorize(ni); 1729 } 1730 return ni; 1731 } 1732 1733 void 1734 ieee80211_init_neighbor(struct ieee80211_node *ni, 1735 const struct ieee80211_frame *wh, 1736 const struct ieee80211_scanparams *sp) 1737 { 1738 int do_ht_setup = 0, do_vht_setup = 0; 1739 1740 ni->ni_esslen = sp->ssid[1]; 1741 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1742 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1743 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1744 ni->ni_intval = sp->bintval; 1745 ni->ni_capinfo = sp->capinfo; 1746 ni->ni_chan = ni->ni_ic->ic_curchan; 1747 ni->ni_fhdwell = sp->fhdwell; 1748 ni->ni_fhindex = sp->fhindex; 1749 ni->ni_erp = sp->erp; 1750 ni->ni_timoff = sp->timoff; 1751 #ifdef IEEE80211_SUPPORT_MESH 1752 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1753 ieee80211_mesh_init_neighbor(ni, wh, sp); 1754 #endif 1755 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1756 ieee80211_ies_expand(&ni->ni_ies); 1757 if (ni->ni_ies.wme_ie != NULL) 1758 ni->ni_flags |= IEEE80211_NODE_QOS; 1759 else 1760 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1761 #ifdef IEEE80211_SUPPORT_SUPERG 1762 if (ni->ni_ies.ath_ie != NULL) 1763 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1764 #endif 1765 if (ni->ni_ies.htcap_ie != NULL) 1766 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1767 if (ni->ni_ies.htinfo_ie != NULL) 1768 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1769 1770 if (ni->ni_ies.vhtcap_ie != NULL) 1771 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 1772 if (ni->ni_ies.vhtopmode_ie != NULL) 1773 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 1774 1775 if ((ni->ni_ies.htcap_ie != NULL) && 1776 (ni->ni_ies.htinfo_ie != NULL) && 1777 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1778 do_ht_setup = 1; 1779 } 1780 1781 if ((ni->ni_ies.vhtcap_ie != NULL) && 1782 (ni->ni_ies.vhtopmode_ie != NULL) && 1783 (ni->ni_vap->iv_flags_vht & IEEE80211_FVHT_VHT)) { 1784 do_vht_setup = 1; 1785 } 1786 1787 } 1788 1789 /* NB: must be after ni_chan is setup */ 1790 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1791 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1792 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1793 1794 /* 1795 * If the neighbor is HT compatible, flip that on. 1796 */ 1797 if (do_ht_setup) { 1798 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1799 "%s: doing HT setup\n", __func__); 1800 ieee80211_ht_node_init(ni); 1801 ieee80211_ht_updateparams(ni, 1802 ni->ni_ies.htcap_ie, 1803 ni->ni_ies.htinfo_ie); 1804 1805 if (do_vht_setup) { 1806 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1807 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1808 __func__, 1809 ni->ni_macaddr, 1810 ":"); 1811 } else { 1812 ieee80211_vht_node_init(ni); 1813 ieee80211_vht_updateparams(ni, 1814 ni->ni_ies.vhtcap_ie, 1815 ni->ni_ies.vhtopmode_ie); 1816 ieee80211_setup_vht_rates(ni, 1817 ni->ni_ies.vhtcap_ie, 1818 ni->ni_ies.vhtopmode_ie); 1819 } 1820 } 1821 1822 /* 1823 * Finally do the channel upgrade/change based 1824 * on the HT/VHT configuration. 1825 */ 1826 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1827 ni->ni_ies.htinfo_ie); 1828 ieee80211_setup_htrates(ni, 1829 ni->ni_ies.htcap_ie, 1830 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1831 ieee80211_setup_basic_htrates(ni, 1832 ni->ni_ies.htinfo_ie); 1833 1834 ieee80211_node_setuptxparms(ni); 1835 ieee80211_ratectl_node_init(ni); 1836 1837 /* Reassociate; we're now 11n/11ac */ 1838 /* 1839 * XXX TODO: this is the wrong thing to do - 1840 * we're calling it with isnew=1 so the ath(4) 1841 * driver reinitialises the rate tables. 1842 * This "mostly" works for ath(4), but it won't 1843 * be right for firmware devices which allocate 1844 * node states. 1845 * 1846 * So, do we just create a new node and delete 1847 * the old one? Or? 1848 */ 1849 if (ni->ni_ic->ic_newassoc) 1850 ni->ni_ic->ic_newassoc(ni, 1); 1851 } 1852 } 1853 1854 /* 1855 * Do node discovery in adhoc mode on receipt of a beacon 1856 * or probe response frame. Note that for the driver's 1857 * benefit we we treat this like an association so the 1858 * driver has an opportunity to setup it's private state. 1859 */ 1860 struct ieee80211_node * 1861 ieee80211_add_neighbor(struct ieee80211vap *vap, 1862 const struct ieee80211_frame *wh, 1863 const struct ieee80211_scanparams *sp) 1864 { 1865 struct ieee80211_node *ni; 1866 1867 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1868 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1869 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1870 if (ni != NULL) { 1871 struct ieee80211com *ic = vap->iv_ic; 1872 1873 ieee80211_init_neighbor(ni, wh, sp); 1874 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1875 ni->ni_flags |= IEEE80211_NODE_ERP; 1876 ieee80211_node_setuptxparms(ni); 1877 ieee80211_ratectl_node_init(ni); 1878 if (ic->ic_newassoc != NULL) 1879 ic->ic_newassoc(ni, 1); 1880 /* XXX not right for 802.1x/WPA */ 1881 ieee80211_node_authorize(ni); 1882 } 1883 return ni; 1884 } 1885 1886 #define IS_PROBEREQ(wh) \ 1887 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1888 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1889 #define IS_BCAST_PROBEREQ(wh) \ 1890 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1891 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1892 1893 static __inline struct ieee80211_node * 1894 _find_rxnode(struct ieee80211_node_table *nt, 1895 const struct ieee80211_frame_min *wh) 1896 { 1897 if (IS_BCAST_PROBEREQ(wh)) 1898 return NULL; /* spam bcast probe req to all vap's */ 1899 return ieee80211_find_node_locked(nt, wh->i_addr2); 1900 } 1901 1902 /* 1903 * Locate the node for sender, track state, and then pass the 1904 * (referenced) node up to the 802.11 layer for its use. Note 1905 * we can return NULL if the sender is not in the table. 1906 */ 1907 struct ieee80211_node * 1908 #ifdef IEEE80211_DEBUG_REFCNT 1909 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1910 const struct ieee80211_frame_min *wh, const char *func, int line) 1911 #else 1912 ieee80211_find_rxnode(struct ieee80211com *ic, 1913 const struct ieee80211_frame_min *wh) 1914 #endif 1915 { 1916 struct ieee80211_node_table *nt; 1917 struct ieee80211_node *ni; 1918 1919 nt = &ic->ic_sta; 1920 IEEE80211_NODE_LOCK(nt); 1921 ni = _find_rxnode(nt, wh); 1922 IEEE80211_NODE_UNLOCK(nt); 1923 1924 return ni; 1925 } 1926 1927 /* 1928 * Like ieee80211_find_rxnode but use the supplied h/w 1929 * key index as a hint to locate the node in the key 1930 * mapping table. If an entry is present at the key 1931 * index we return it; otherwise do a normal lookup and 1932 * update the mapping table if the station has a unicast 1933 * key assigned to it. 1934 */ 1935 struct ieee80211_node * 1936 #ifdef IEEE80211_DEBUG_REFCNT 1937 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1938 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1939 const char *func, int line) 1940 #else 1941 ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1942 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1943 #endif 1944 { 1945 struct ieee80211_node_table *nt; 1946 struct ieee80211_node *ni; 1947 1948 nt = &ic->ic_sta; 1949 IEEE80211_NODE_LOCK(nt); 1950 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1951 ni = nt->nt_keyixmap[keyix]; 1952 else 1953 ni = NULL; 1954 if (ni == NULL) { 1955 ni = _find_rxnode(nt, wh); 1956 if (ni != NULL && nt->nt_keyixmap != NULL) { 1957 /* 1958 * If the station has a unicast key cache slot 1959 * assigned update the key->node mapping table. 1960 */ 1961 keyix = ni->ni_ucastkey.wk_rxkeyix; 1962 /* XXX can keyixmap[keyix] != NULL? */ 1963 if (keyix < nt->nt_keyixmax && 1964 nt->nt_keyixmap[keyix] == NULL) { 1965 IEEE80211_DPRINTF(ni->ni_vap, 1966 IEEE80211_MSG_NODE, 1967 "%s: add key map entry %p<%s> refcnt %d\n", 1968 __func__, ni, ether_sprintf(ni->ni_macaddr), 1969 ieee80211_node_refcnt(ni)+1); 1970 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1971 } 1972 } 1973 } else { 1974 if (IS_BCAST_PROBEREQ(wh)) 1975 ni = NULL; /* spam bcast probe req to all vap's */ 1976 else 1977 ieee80211_ref_node(ni); 1978 } 1979 IEEE80211_NODE_UNLOCK(nt); 1980 1981 return ni; 1982 } 1983 #undef IS_BCAST_PROBEREQ 1984 #undef IS_PROBEREQ 1985 1986 /* 1987 * Return a reference to the appropriate node for sending 1988 * a data frame. This handles node discovery in adhoc networks. 1989 */ 1990 struct ieee80211_node * 1991 #ifdef IEEE80211_DEBUG_REFCNT 1992 ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1993 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1994 const char *func, int line) 1995 #else 1996 ieee80211_find_txnode(struct ieee80211vap *vap, 1997 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1998 #endif 1999 { 2000 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 2001 struct ieee80211_node *ni; 2002 2003 /* 2004 * The destination address should be in the node table 2005 * unless this is a multicast/broadcast frame. We can 2006 * also optimize station mode operation, all frames go 2007 * to the bss node. 2008 */ 2009 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 2010 IEEE80211_NODE_LOCK(nt); 2011 if (vap->iv_opmode == IEEE80211_M_STA || 2012 vap->iv_opmode == IEEE80211_M_WDS || 2013 IEEE80211_IS_MULTICAST(macaddr)) 2014 ni = ieee80211_ref_node(vap->iv_bss); 2015 else 2016 ni = ieee80211_find_node_locked(nt, macaddr); 2017 IEEE80211_NODE_UNLOCK(nt); 2018 2019 if (ni == NULL) { 2020 if (vap->iv_opmode == IEEE80211_M_IBSS || 2021 vap->iv_opmode == IEEE80211_M_AHDEMO) { 2022 /* 2023 * In adhoc mode cons up a node for the destination. 2024 * Note that we need an additional reference for the 2025 * caller to be consistent with 2026 * ieee80211_find_node_locked. 2027 */ 2028 /* 2029 * XXX TODO: this doesn't fake up 11n state; we need 2030 * to find another way to get it upgraded. 2031 */ 2032 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 2033 if (ni != NULL) 2034 (void) ieee80211_ref_node(ni); 2035 } else { 2036 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 2037 "no node, discard frame (%s)", __func__); 2038 vap->iv_stats.is_tx_nonode++; 2039 } 2040 } 2041 return ni; 2042 } 2043 2044 static void 2045 _ieee80211_free_node(struct ieee80211_node *ni) 2046 { 2047 struct ieee80211_node_table *nt = ni->ni_table; 2048 2049 /* 2050 * NB: careful about referencing the vap as it may be 2051 * gone if the last reference was held by a driver. 2052 * We know the com will always be present so it's safe 2053 * to use ni_ic below to reclaim resources. 2054 */ 2055 #if 0 2056 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2057 "%s %p<%s> in %s table\n", __func__, ni, 2058 ether_sprintf(ni->ni_macaddr), 2059 nt != NULL ? nt->nt_name : "<gone>"); 2060 #endif 2061 if (ni->ni_associd != 0) { 2062 struct ieee80211vap *vap = ni->ni_vap; 2063 if (vap->iv_aid_bitmap != NULL) 2064 IEEE80211_AID_CLR(vap, ni->ni_associd); 2065 } 2066 if (nt != NULL) 2067 ieee80211_del_node_nt(nt, ni); 2068 ni->ni_ic->ic_node_free(ni); 2069 } 2070 2071 /* 2072 * Clear any entry in the unicast key mapping table. 2073 */ 2074 static int 2075 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2076 { 2077 ieee80211_keyix keyix; 2078 2079 keyix = ni->ni_ucastkey.wk_rxkeyix; 2080 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 2081 nt->nt_keyixmap[keyix] == ni) { 2082 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2083 "%s: %p<%s> clear key map entry %u\n", 2084 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 2085 nt->nt_keyixmap[keyix] = NULL; 2086 ieee80211_node_decref(ni); 2087 return 1; 2088 } 2089 2090 return 0; 2091 } 2092 2093 void 2094 #ifdef IEEE80211_DEBUG_REFCNT 2095 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 2096 #else 2097 ieee80211_free_node(struct ieee80211_node *ni) 2098 #endif 2099 { 2100 struct ieee80211_node_table *nt = ni->ni_table; 2101 2102 #ifdef IEEE80211_DEBUG_REFCNT 2103 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2104 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 2105 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 2106 #endif 2107 if (nt != NULL) { 2108 IEEE80211_NODE_LOCK(nt); 2109 if (ieee80211_node_dectestref(ni)) { 2110 /* 2111 * Last reference, reclaim state. 2112 */ 2113 _ieee80211_free_node(ni); 2114 } else if (ieee80211_node_refcnt(ni) == 1) 2115 if (node_clear_keyixmap(nt, ni)) 2116 _ieee80211_free_node(ni); 2117 IEEE80211_NODE_UNLOCK(nt); 2118 } else { 2119 if (ieee80211_node_dectestref(ni)) 2120 _ieee80211_free_node(ni); 2121 } 2122 } 2123 2124 /* 2125 * Reclaim a unicast key and clear any key cache state. 2126 */ 2127 int 2128 ieee80211_node_delucastkey(struct ieee80211_node *ni) 2129 { 2130 struct ieee80211com *ic = ni->ni_ic; 2131 struct ieee80211_node_table *nt = &ic->ic_sta; 2132 struct ieee80211_node *nikey; 2133 ieee80211_keyix keyix; 2134 int isowned, status; 2135 2136 /* 2137 * NB: We must beware of LOR here; deleting the key 2138 * can cause the crypto layer to block traffic updates 2139 * which can generate a LOR against the node table lock; 2140 * grab it here and stash the key index for our use below. 2141 * 2142 * Must also beware of recursion on the node table lock. 2143 * When called from node_cleanup we may already have 2144 * the node table lock held. Unfortunately there's no 2145 * way to separate out this path so we must do this 2146 * conditionally. 2147 */ 2148 isowned = IEEE80211_NODE_IS_LOCKED(nt); 2149 if (!isowned) 2150 IEEE80211_NODE_LOCK(nt); 2151 nikey = NULL; 2152 status = 1; /* NB: success */ 2153 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 2154 keyix = ni->ni_ucastkey.wk_rxkeyix; 2155 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 2156 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 2157 nikey = nt->nt_keyixmap[keyix]; 2158 nt->nt_keyixmap[keyix] = NULL; 2159 } 2160 } 2161 if (!isowned) 2162 IEEE80211_NODE_UNLOCK(nt); 2163 2164 if (nikey != NULL) { 2165 KASSERT(nikey == ni, 2166 ("key map out of sync, ni %p nikey %p", ni, nikey)); 2167 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2168 "%s: delete key map entry %p<%s> refcnt %d\n", 2169 __func__, ni, ether_sprintf(ni->ni_macaddr), 2170 ieee80211_node_refcnt(ni)-1); 2171 ieee80211_free_node(ni); 2172 } 2173 return status; 2174 } 2175 2176 /* 2177 * Reclaim a node. If this is the last reference count then 2178 * do the normal free work. Otherwise remove it from the node 2179 * table and mark it gone by clearing the back-reference. 2180 */ 2181 static void 2182 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2183 { 2184 2185 IEEE80211_NODE_LOCK_ASSERT(nt); 2186 2187 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2188 "%s: remove %p<%s> from %s table, refcnt %d\n", 2189 __func__, ni, ether_sprintf(ni->ni_macaddr), 2190 nt->nt_name, ieee80211_node_refcnt(ni)-1); 2191 /* 2192 * Clear any entry in the unicast key mapping table. 2193 * We need to do it here so rx lookups don't find it 2194 * in the mapping table even if it's not in the hash 2195 * table. We cannot depend on the mapping table entry 2196 * being cleared because the node may not be free'd. 2197 */ 2198 (void)node_clear_keyixmap(nt, ni); 2199 if (!ieee80211_node_dectestref(ni)) { 2200 /* 2201 * Other references are present, just remove the 2202 * node from the table so it cannot be found. When 2203 * the references are dropped storage will be 2204 * reclaimed. 2205 */ 2206 ieee80211_del_node_nt(nt, ni); 2207 } else 2208 _ieee80211_free_node(ni); 2209 } 2210 2211 /* 2212 * Node table support. 2213 */ 2214 2215 static void 2216 ieee80211_node_table_init(struct ieee80211com *ic, 2217 struct ieee80211_node_table *nt, 2218 const char *name, int inact, int keyixmax) 2219 { 2220 2221 nt->nt_ic = ic; 2222 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 2223 TAILQ_INIT(&nt->nt_node); 2224 nt->nt_count = 0; 2225 nt->nt_name = name; 2226 nt->nt_inact_init = inact; 2227 nt->nt_keyixmax = keyixmax; 2228 if (nt->nt_keyixmax > 0) { 2229 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 2230 keyixmax * sizeof(struct ieee80211_node *), 2231 M_80211_NODE, 2232 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2233 if (nt->nt_keyixmap == NULL) 2234 ic_printf(ic, 2235 "Cannot allocate key index map with %u entries\n", 2236 keyixmax); 2237 } else 2238 nt->nt_keyixmap = NULL; 2239 } 2240 2241 static void 2242 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 2243 struct ieee80211vap *match) 2244 { 2245 struct ieee80211_node *ni, *next; 2246 2247 IEEE80211_NODE_LOCK(nt); 2248 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 2249 if (match != NULL && ni->ni_vap != match) 2250 continue; 2251 /* XXX can this happen? if so need's work */ 2252 if (ni->ni_associd != 0) { 2253 struct ieee80211vap *vap = ni->ni_vap; 2254 2255 if (vap->iv_auth->ia_node_leave != NULL) 2256 vap->iv_auth->ia_node_leave(ni); 2257 if (vap->iv_aid_bitmap != NULL) 2258 IEEE80211_AID_CLR(vap, ni->ni_associd); 2259 } 2260 ni->ni_wdsvap = NULL; /* clear reference */ 2261 node_reclaim(nt, ni); 2262 } 2263 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 2264 /* 2265 * Make a separate pass to clear references to this vap 2266 * held by DWDS entries. They will not be matched above 2267 * because ni_vap will point to the ap vap but we still 2268 * need to clear ni_wdsvap when the WDS vap is destroyed 2269 * and/or reset. 2270 */ 2271 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 2272 if (ni->ni_wdsvap == match) 2273 ni->ni_wdsvap = NULL; 2274 } 2275 IEEE80211_NODE_UNLOCK(nt); 2276 } 2277 2278 static void 2279 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2280 { 2281 ieee80211_node_table_reset(nt, NULL); 2282 if (nt->nt_keyixmap != NULL) { 2283 #ifdef DIAGNOSTIC 2284 /* XXX verify all entries are NULL */ 2285 int i; 2286 for (i = 0; i < nt->nt_keyixmax; i++) 2287 if (nt->nt_keyixmap[i] != NULL) 2288 printf("%s: %s[%u] still active\n", __func__, 2289 nt->nt_name, i); 2290 #endif 2291 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 2292 nt->nt_keyixmap = NULL; 2293 } 2294 IEEE80211_NODE_LOCK_DESTROY(nt); 2295 } 2296 2297 static void 2298 timeout_stations(void *arg __unused, struct ieee80211_node *ni) 2299 { 2300 struct ieee80211com *ic = ni->ni_ic; 2301 struct ieee80211vap *vap = ni->ni_vap; 2302 2303 /* 2304 * Only process stations when in RUN state. This 2305 * insures, for example, that we don't timeout an 2306 * inactive station during CAC. Note that CSA state 2307 * is actually handled in ieee80211_node_timeout as 2308 * it applies to more than timeout processing. 2309 */ 2310 if (vap->iv_state != IEEE80211_S_RUN) 2311 return; 2312 /* 2313 * Ignore entries for which have yet to receive an 2314 * authentication frame. These are transient and 2315 * will be reclaimed when the last reference to them 2316 * goes away (when frame xmits complete). 2317 */ 2318 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2319 vap->iv_opmode == IEEE80211_M_STA) && 2320 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2321 return; 2322 /* 2323 * Free fragment if not needed anymore 2324 * (last fragment older than 1s). 2325 * XXX doesn't belong here, move to node_age 2326 */ 2327 if (ni->ni_rxfrag[0] != NULL && 2328 ticks > ni->ni_rxfragstamp + hz) { 2329 m_freem(ni->ni_rxfrag[0]); 2330 ni->ni_rxfrag[0] = NULL; 2331 } 2332 if (ni->ni_inact > 0) { 2333 ni->ni_inact--; 2334 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2335 "%s: inact %u inact_reload %u nrates %u", 2336 __func__, ni->ni_inact, ni->ni_inact_reload, 2337 ni->ni_rates.rs_nrates); 2338 } 2339 /* 2340 * Special case ourself; we may be idle for extended periods 2341 * of time and regardless reclaiming our state is wrong. 2342 * XXX run ic_node_age 2343 */ 2344 /* XXX before inact decrement? */ 2345 if (ni == vap->iv_bss) 2346 return; 2347 if (ni->ni_associd != 0 || 2348 (vap->iv_opmode == IEEE80211_M_IBSS || 2349 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2350 /* 2351 * Age/drain resources held by the station. 2352 */ 2353 ic->ic_node_age(ni); 2354 /* 2355 * Probe the station before time it out. We 2356 * send a null data frame which may not be 2357 * universally supported by drivers (need it 2358 * for ps-poll support so it should be...). 2359 * 2360 * XXX don't probe the station unless we've 2361 * received a frame from them (and have 2362 * some idea of the rates they are capable 2363 * of); this will get fixed more properly 2364 * soon with better handling of the rate set. 2365 */ 2366 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2367 (0 < ni->ni_inact && 2368 ni->ni_inact <= vap->iv_inact_probe) && 2369 ni->ni_rates.rs_nrates != 0) { 2370 IEEE80211_NOTE(vap, 2371 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2372 ni, "%s", 2373 "probe station due to inactivity"); 2374 /* 2375 * Grab a reference so the node cannot 2376 * be reclaimed before we send the frame. 2377 * ieee80211_send_nulldata understands 2378 * we've done this and reclaims the 2379 * ref for us as needed. 2380 */ 2381 /* XXX fix this (not required anymore). */ 2382 ieee80211_ref_node(ni); 2383 /* XXX useless */ 2384 ieee80211_send_nulldata(ni); 2385 /* XXX stat? */ 2386 return; 2387 } 2388 } 2389 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2390 ni->ni_inact <= 0) { 2391 IEEE80211_NOTE(vap, 2392 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2393 "station timed out due to inactivity " 2394 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2395 /* 2396 * Send a deauthenticate frame and drop the station. 2397 * This is somewhat complicated due to reference counts 2398 * and locking. At this point a station will typically 2399 * have a reference count of 2. ieee80211_node_leave 2400 * will do a "free" of the node which will drop the 2401 * reference count. But in the meantime a reference 2402 * wil be held by the deauth frame. The actual reclaim 2403 * of the node will happen either after the tx is 2404 * completed or by ieee80211_node_leave. 2405 */ 2406 if (ni->ni_associd != 0) { 2407 IEEE80211_SEND_MGMT(ni, 2408 IEEE80211_FC0_SUBTYPE_DEAUTH, 2409 IEEE80211_REASON_AUTH_EXPIRE); 2410 } 2411 ieee80211_node_leave(ni); 2412 vap->iv_stats.is_node_timeout++; 2413 } 2414 } 2415 2416 /* 2417 * Timeout inactive stations and do related housekeeping. 2418 */ 2419 static void 2420 ieee80211_timeout_stations(struct ieee80211com *ic) 2421 { 2422 struct ieee80211_node_table *nt = &ic->ic_sta; 2423 2424 ieee80211_iterate_nodes(nt, timeout_stations, NULL); 2425 } 2426 2427 /* 2428 * Aggressively reclaim resources. This should be used 2429 * only in a critical situation to reclaim mbuf resources. 2430 */ 2431 void 2432 ieee80211_drain(struct ieee80211com *ic) 2433 { 2434 struct ieee80211_node_table *nt = &ic->ic_sta; 2435 struct ieee80211vap *vap; 2436 struct ieee80211_node *ni; 2437 2438 IEEE80211_NODE_LOCK(nt); 2439 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2440 /* 2441 * Ignore entries for which have yet to receive an 2442 * authentication frame. These are transient and 2443 * will be reclaimed when the last reference to them 2444 * goes away (when frame xmits complete). 2445 */ 2446 vap = ni->ni_vap; 2447 /* 2448 * Only process stations when in RUN state. This 2449 * insures, for example, that we don't timeout an 2450 * inactive station during CAC. Note that CSA state 2451 * is actually handled in ieee80211_node_timeout as 2452 * it applies to more than timeout processing. 2453 */ 2454 if (vap->iv_state != IEEE80211_S_RUN) 2455 continue; 2456 /* XXX can vap be NULL? */ 2457 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2458 vap->iv_opmode == IEEE80211_M_STA) && 2459 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2460 continue; 2461 /* 2462 * Free fragments. 2463 * XXX doesn't belong here, move to node_drain 2464 */ 2465 if (ni->ni_rxfrag[0] != NULL) { 2466 m_freem(ni->ni_rxfrag[0]); 2467 ni->ni_rxfrag[0] = NULL; 2468 } 2469 /* 2470 * Drain resources held by the station. 2471 */ 2472 ic->ic_node_drain(ni); 2473 } 2474 IEEE80211_NODE_UNLOCK(nt); 2475 } 2476 2477 /* 2478 * Per-ieee80211com inactivity timer callback. 2479 */ 2480 void 2481 ieee80211_node_timeout(void *arg) 2482 { 2483 struct ieee80211com *ic = arg; 2484 2485 /* 2486 * Defer timeout processing if a channel switch is pending. 2487 * We typically need to be mute so not doing things that 2488 * might generate frames is good to handle in one place. 2489 * Suppressing the station timeout processing may extend the 2490 * lifetime of inactive stations (by not decrementing their 2491 * idle counters) but this should be ok unless the CSA is 2492 * active for an unusually long time. 2493 */ 2494 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2495 ieee80211_scan_timeout(ic); 2496 ieee80211_timeout_stations(ic); 2497 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2498 2499 IEEE80211_LOCK(ic); 2500 ieee80211_erp_timeout(ic); 2501 ieee80211_ht_timeout(ic); 2502 ieee80211_vht_timeout(ic); 2503 IEEE80211_UNLOCK(ic); 2504 } 2505 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2506 ieee80211_node_timeout, ic); 2507 } 2508 2509 /* 2510 * The same as ieee80211_iterate_nodes(), but for one vap only. 2511 */ 2512 int 2513 ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt, 2514 struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg) 2515 { 2516 struct ieee80211_node **ni_arr; 2517 struct ieee80211_node *ni; 2518 size_t size; 2519 int count, i; 2520 2521 /* 2522 * Iterate over the node table and save an array of ref'ed nodes. 2523 * 2524 * This is separated out from calling the actual node function so that 2525 * no LORs will occur. 2526 */ 2527 IEEE80211_NODE_LOCK(nt); 2528 count = nt->nt_count; 2529 size = count * sizeof(struct ieee80211_node *); 2530 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2531 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2532 if (ni_arr == NULL) { 2533 IEEE80211_NODE_UNLOCK(nt); 2534 return (ENOMEM); 2535 } 2536 2537 i = 0; 2538 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2539 if (vap != NULL && ni->ni_vap != vap) 2540 continue; 2541 KASSERT(i < count, 2542 ("node array overflow (vap %p, i %d, count %d)\n", 2543 vap, i, count)); 2544 ni_arr[i] = ieee80211_ref_node(ni); 2545 i++; 2546 } 2547 IEEE80211_NODE_UNLOCK(nt); 2548 2549 for (i = 0; i < count; i++) { 2550 if (ni_arr[i] == NULL) /* end of the list */ 2551 break; 2552 (*f)(arg, ni_arr[i]); 2553 /* ieee80211_free_node() locks by itself */ 2554 ieee80211_free_node(ni_arr[i]); 2555 } 2556 2557 IEEE80211_FREE(ni_arr, M_80211_NODE); 2558 2559 return (0); 2560 } 2561 2562 /* 2563 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2564 * reference in the source. 2565 */ 2566 void 2567 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2568 ieee80211_iter_func *f, void *arg) 2569 { 2570 /* XXX no way to pass error to the caller. */ 2571 (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg); 2572 } 2573 2574 void 2575 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2576 { 2577 printf("0x%p: mac %s refcnt %d\n", ni, 2578 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2579 printf("\tauthmode %u flags 0x%x\n", 2580 ni->ni_authmode, ni->ni_flags); 2581 printf("\tassocid 0x%x txpower %u vlan %u\n", 2582 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2583 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2584 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2585 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2586 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2587 ni->ni_rxfragstamp); 2588 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2589 node_getrssi(ni), ni->ni_noise, 2590 ni->ni_intval, ni->ni_capinfo); 2591 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2592 ether_sprintf(ni->ni_bssid), 2593 ni->ni_esslen, ni->ni_essid, 2594 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2595 printf("\tinact %u inact_reload %u txrate %u\n", 2596 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2597 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2598 ni->ni_htcap, ni->ni_htparam, 2599 ni->ni_htctlchan, ni->ni_ht2ndchan); 2600 printf("\thtopmode %x htstbc %x htchw %u\n", 2601 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2602 printf("\tvhtcap %x freq1 %d freq2 %d vhtbasicmcs %x\n", 2603 ni->ni_vhtcap, (int) ni->ni_vht_chan1, (int) ni->ni_vht_chan2, 2604 (int) ni->ni_vht_basicmcs); 2605 /* XXX VHT state */ 2606 } 2607 2608 void 2609 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2610 { 2611 ieee80211_iterate_nodes(nt, 2612 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2613 } 2614 2615 static void 2616 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2617 { 2618 struct ieee80211vap *vap; 2619 2620 IEEE80211_LOCK_ASSERT(ic); 2621 2622 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2623 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2624 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2625 } 2626 2627 void 2628 ieee80211_notify_erp(struct ieee80211com *ic) 2629 { 2630 IEEE80211_LOCK(ic); 2631 ieee80211_notify_erp_locked(ic); 2632 IEEE80211_UNLOCK(ic); 2633 } 2634 2635 /* 2636 * Handle a station joining an 11g network. 2637 */ 2638 static void 2639 ieee80211_node_join_11g(struct ieee80211_node *ni) 2640 { 2641 struct ieee80211com *ic = ni->ni_ic; 2642 2643 IEEE80211_LOCK_ASSERT(ic); 2644 2645 /* 2646 * Station isn't capable of short slot time. Bump 2647 * the count of long slot time stations and disable 2648 * use of short slot time. Note that the actual switch 2649 * over to long slot time use may not occur until the 2650 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2651 */ 2652 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2653 ic->ic_longslotsta++; 2654 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2655 "station needs long slot time, count %d", 2656 ic->ic_longslotsta); 2657 /* XXX vap's w/ conflicting needs won't work */ 2658 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2659 /* 2660 * Don't force slot time when switched to turbo 2661 * mode as non-ERP stations won't be present; this 2662 * need only be done when on the normal G channel. 2663 */ 2664 ieee80211_set_shortslottime(ic, 0); 2665 } 2666 } 2667 /* 2668 * If the new station is not an ERP station 2669 * then bump the counter and enable protection 2670 * if configured. 2671 */ 2672 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2673 ic->ic_nonerpsta++; 2674 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2675 "station is !ERP, %d non-ERP stations associated", 2676 ic->ic_nonerpsta); 2677 /* 2678 * If station does not support short preamble 2679 * then we must enable use of Barker preamble. 2680 */ 2681 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2682 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2683 "%s", "station needs long preamble"); 2684 ic->ic_flags |= IEEE80211_F_USEBARKER; 2685 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2686 } 2687 /* 2688 * If protection is configured and this is the first 2689 * indication we should use protection, enable it. 2690 */ 2691 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2692 ic->ic_nonerpsta == 1 && 2693 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2694 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2695 "%s: enable use of protection\n", __func__); 2696 ic->ic_flags |= IEEE80211_F_USEPROT; 2697 ieee80211_notify_erp_locked(ic); 2698 } 2699 } else 2700 ni->ni_flags |= IEEE80211_NODE_ERP; 2701 } 2702 2703 void 2704 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2705 { 2706 struct ieee80211com *ic = ni->ni_ic; 2707 struct ieee80211vap *vap = ni->ni_vap; 2708 int newassoc; 2709 2710 if (ni->ni_associd == 0) { 2711 uint16_t aid; 2712 2713 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2714 /* 2715 * It would be good to search the bitmap 2716 * more efficiently, but this will do for now. 2717 */ 2718 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2719 if (!IEEE80211_AID_ISSET(vap, aid)) 2720 break; 2721 } 2722 if (aid >= vap->iv_max_aid) { 2723 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2724 ieee80211_node_leave(ni); 2725 return; 2726 } 2727 ni->ni_associd = aid | 0xc000; 2728 ni->ni_jointime = time_uptime; 2729 IEEE80211_LOCK(ic); 2730 IEEE80211_AID_SET(vap, ni->ni_associd); 2731 vap->iv_sta_assoc++; 2732 ic->ic_sta_assoc++; 2733 2734 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2735 ieee80211_ht_node_join(ni); 2736 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2737 ieee80211_vht_node_join(ni); 2738 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2739 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2740 ieee80211_node_join_11g(ni); 2741 IEEE80211_UNLOCK(ic); 2742 2743 newassoc = 1; 2744 } else 2745 newassoc = 0; 2746 2747 /* 2748 * XXX VHT - should log VHT channel width, etc 2749 */ 2750 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2751 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2752 IEEE80211_NODE_AID(ni), 2753 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2754 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2755 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2756 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2757 /* XXX update for VHT string */ 2758 ni->ni_flags & IEEE80211_NODE_HT ? 2759 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2760 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2761 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2762 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2763 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2764 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2765 ", fast-frames" : "", 2766 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2767 ", turbo" : "" 2768 ); 2769 2770 ieee80211_node_setuptxparms(ni); 2771 ieee80211_ratectl_node_init(ni); 2772 /* give driver a chance to setup state like ni_txrate */ 2773 if (ic->ic_newassoc != NULL) 2774 ic->ic_newassoc(ni, newassoc); 2775 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2776 /* tell the authenticator about new station */ 2777 if (vap->iv_auth->ia_node_join != NULL) 2778 vap->iv_auth->ia_node_join(ni); 2779 ieee80211_notify_node_join(ni, 2780 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2781 } 2782 2783 static void 2784 disable_protection(struct ieee80211com *ic) 2785 { 2786 KASSERT(ic->ic_nonerpsta == 0 && 2787 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2788 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2789 ic->ic_flags_ext)); 2790 2791 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2792 /* XXX verify mode? */ 2793 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2794 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2795 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2796 } 2797 ieee80211_notify_erp_locked(ic); 2798 } 2799 2800 /* 2801 * Handle a station leaving an 11g network. 2802 */ 2803 static void 2804 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2805 { 2806 struct ieee80211com *ic = ni->ni_ic; 2807 2808 IEEE80211_LOCK_ASSERT(ic); 2809 2810 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2811 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2812 ic->ic_bsschan->ic_flags)); 2813 2814 /* 2815 * If a long slot station do the slot time bookkeeping. 2816 */ 2817 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2818 KASSERT(ic->ic_longslotsta > 0, 2819 ("bogus long slot station count %d", ic->ic_longslotsta)); 2820 ic->ic_longslotsta--; 2821 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2822 "long slot time station leaves, count now %d", 2823 ic->ic_longslotsta); 2824 if (ic->ic_longslotsta == 0) { 2825 /* 2826 * Re-enable use of short slot time if supported 2827 * and not operating in IBSS mode (per spec). 2828 */ 2829 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2830 ic->ic_opmode != IEEE80211_M_IBSS) { 2831 IEEE80211_DPRINTF(ni->ni_vap, 2832 IEEE80211_MSG_ASSOC, 2833 "%s: re-enable use of short slot time\n", 2834 __func__); 2835 ieee80211_set_shortslottime(ic, 1); 2836 } 2837 } 2838 } 2839 /* 2840 * If a non-ERP station do the protection-related bookkeeping. 2841 */ 2842 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2843 KASSERT(ic->ic_nonerpsta > 0, 2844 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2845 ic->ic_nonerpsta--; 2846 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2847 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2848 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2849 " (non-ERP sta present)" : ""); 2850 if (ic->ic_nonerpsta == 0 && 2851 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2852 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2853 "%s: disable use of protection\n", __func__); 2854 disable_protection(ic); 2855 } 2856 } 2857 } 2858 2859 /* 2860 * Time out presence of an overlapping bss with non-ERP 2861 * stations. When operating in hostap mode we listen for 2862 * beacons from other stations and if we identify a non-ERP 2863 * station is present we enable protection. To identify 2864 * when all non-ERP stations are gone we time out this 2865 * condition. 2866 */ 2867 static void 2868 ieee80211_erp_timeout(struct ieee80211com *ic) 2869 { 2870 2871 IEEE80211_LOCK_ASSERT(ic); 2872 2873 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2874 ieee80211_time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2875 #if 0 2876 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2877 "%s", "age out non-ERP sta present on channel"); 2878 #endif 2879 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2880 if (ic->ic_nonerpsta == 0) 2881 disable_protection(ic); 2882 } 2883 } 2884 2885 /* 2886 * Handle bookkeeping for station deauthentication/disassociation 2887 * when operating as an ap. 2888 */ 2889 void 2890 ieee80211_node_leave(struct ieee80211_node *ni) 2891 { 2892 struct ieee80211com *ic = ni->ni_ic; 2893 struct ieee80211vap *vap = ni->ni_vap; 2894 struct ieee80211_node_table *nt = ni->ni_table; 2895 2896 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2897 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2898 2899 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2900 ("unexpected operating mode %u", vap->iv_opmode)); 2901 /* 2902 * If node wasn't previously associated all 2903 * we need to do is reclaim the reference. 2904 */ 2905 /* XXX ibss mode bypasses 11g and notification */ 2906 if (ni->ni_associd == 0) 2907 goto done; 2908 /* 2909 * Tell the authenticator the station is leaving. 2910 * Note that we must do this before yanking the 2911 * association id as the authenticator uses the 2912 * associd to locate it's state block. 2913 */ 2914 if (vap->iv_auth->ia_node_leave != NULL) 2915 vap->iv_auth->ia_node_leave(ni); 2916 2917 IEEE80211_LOCK(ic); 2918 IEEE80211_AID_CLR(vap, ni->ni_associd); 2919 vap->iv_sta_assoc--; 2920 ic->ic_sta_assoc--; 2921 2922 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2923 ieee80211_vht_node_leave(ni); 2924 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2925 ieee80211_ht_node_leave(ni); 2926 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2927 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2928 ieee80211_node_leave_11g(ni); 2929 IEEE80211_UNLOCK(ic); 2930 /* 2931 * Cleanup station state. In particular clear various 2932 * state that might otherwise be reused if the node 2933 * is reused before the reference count goes to zero 2934 * (and memory is reclaimed). 2935 */ 2936 ieee80211_sta_leave(ni); 2937 done: 2938 /* 2939 * Remove the node from any table it's recorded in and 2940 * drop the caller's reference. Removal from the table 2941 * is important to insure the node is not reprocessed 2942 * for inactivity. 2943 */ 2944 if (nt != NULL) { 2945 IEEE80211_NODE_LOCK(nt); 2946 node_reclaim(nt, ni); 2947 IEEE80211_NODE_UNLOCK(nt); 2948 } else 2949 ieee80211_free_node(ni); 2950 } 2951 2952 struct rssiinfo { 2953 int rssi_samples; 2954 uint32_t rssi_total; 2955 }; 2956 2957 static void 2958 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2959 { 2960 struct rssiinfo *info = arg; 2961 struct ieee80211vap *vap = ni->ni_vap; 2962 int8_t rssi; 2963 2964 /* only associated stations */ 2965 if (ni->ni_associd == 0) 2966 return; 2967 rssi = vap->iv_ic->ic_node_getrssi(ni); 2968 if (rssi != 0) { 2969 info->rssi_samples++; 2970 info->rssi_total += rssi; 2971 } 2972 } 2973 2974 static void 2975 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2976 { 2977 struct rssiinfo *info = arg; 2978 struct ieee80211vap *vap = ni->ni_vap; 2979 int8_t rssi; 2980 2981 /* only neighbors */ 2982 /* XXX check bssid */ 2983 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2984 return; 2985 rssi = vap->iv_ic->ic_node_getrssi(ni); 2986 if (rssi != 0) { 2987 info->rssi_samples++; 2988 info->rssi_total += rssi; 2989 } 2990 } 2991 2992 #ifdef IEEE80211_SUPPORT_MESH 2993 static void 2994 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2995 { 2996 struct rssiinfo *info = arg; 2997 struct ieee80211vap *vap = ni->ni_vap; 2998 int8_t rssi; 2999 3000 /* only neighbors that peered successfully */ 3001 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 3002 return; 3003 rssi = vap->iv_ic->ic_node_getrssi(ni); 3004 if (rssi != 0) { 3005 info->rssi_samples++; 3006 info->rssi_total += rssi; 3007 } 3008 } 3009 #endif /* IEEE80211_SUPPORT_MESH */ 3010 3011 int8_t 3012 ieee80211_getrssi(struct ieee80211vap *vap) 3013 { 3014 #define NZ(x) ((x) == 0 ? 1 : (x)) 3015 struct ieee80211com *ic = vap->iv_ic; 3016 struct rssiinfo info; 3017 3018 info.rssi_total = 0; 3019 info.rssi_samples = 0; 3020 switch (vap->iv_opmode) { 3021 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 3022 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 3023 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi, 3024 &info); 3025 break; 3026 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 3027 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi, 3028 &info); 3029 break; 3030 #ifdef IEEE80211_SUPPORT_MESH 3031 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 3032 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi, 3033 &info); 3034 break; 3035 #endif 3036 case IEEE80211_M_MONITOR: /* XXX */ 3037 case IEEE80211_M_STA: /* use stats from associated ap */ 3038 default: 3039 if (vap->iv_bss != NULL) 3040 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 3041 info.rssi_samples = 1; 3042 break; 3043 } 3044 return info.rssi_total / NZ(info.rssi_samples); 3045 #undef NZ 3046 } 3047 3048 void 3049 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 3050 { 3051 3052 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 3053 return; 3054 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 3055 /* for non-station mode return avg'd rssi accounting */ 3056 if (vap->iv_opmode != IEEE80211_M_STA) 3057 *rssi = ieee80211_getrssi(vap); 3058 } 3059