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 <netproto/802_11/ieee80211_var.h> 46 #include <netproto/802_11/ieee80211_input.h> 47 #ifdef IEEE80211_SUPPORT_SUPERG 48 #include <netproto/802_11/ieee80211_superg.h> 49 #endif 50 #ifdef IEEE80211_SUPPORT_TDMA 51 #include <netproto/802_11/ieee80211_tdma.h> 52 #endif 53 #include <netproto/802_11/ieee80211_wds.h> 54 #include <netproto/802_11/ieee80211_mesh.h> 55 #include <netproto/802_11/ieee80211_ratectl.h> 56 57 #include <net/bpf.h> 58 59 /* 60 * IEEE80211_NODE_HASHSIZE must be a power of 2. 61 */ 62 CTASSERT(powerof2(IEEE80211_NODE_HASHSIZE)); 63 64 /* 65 * Association id's are managed with a bit vector. 66 */ 67 #define IEEE80211_AID_SET(_vap, b) \ 68 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 69 (1 << (IEEE80211_AID(b) % 32))) 70 #define IEEE80211_AID_CLR(_vap, b) \ 71 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 72 ~(1 << (IEEE80211_AID(b) % 32))) 73 #define IEEE80211_AID_ISSET(_vap, b) \ 74 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 75 76 #ifdef IEEE80211_DEBUG_REFCNT 77 #define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line 78 #else 79 #define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__ 80 #endif 81 82 static int ieee80211_sta_join1(struct ieee80211_node *); 83 84 static struct ieee80211_node *node_alloc(struct ieee80211vap *, 85 const uint8_t [IEEE80211_ADDR_LEN]); 86 static void node_cleanup(struct ieee80211_node *); 87 static void node_free(struct ieee80211_node *); 88 static void node_age(struct ieee80211_node *); 89 static int8_t node_getrssi(const struct ieee80211_node *); 90 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 91 static void node_getmimoinfo(const struct ieee80211_node *, 92 struct ieee80211_mimo_info *); 93 94 static void _ieee80211_free_node(struct ieee80211_node *); 95 96 static void node_reclaim(struct ieee80211_node_table *nt, 97 struct ieee80211_node *ni); 98 static void ieee80211_node_table_init(struct ieee80211com *ic, 99 struct ieee80211_node_table *nt, const char *name, 100 int inact, int keymaxix); 101 static void ieee80211_node_table_reset(struct ieee80211_node_table *, 102 struct ieee80211vap *); 103 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 104 static void ieee80211_erp_timeout(struct ieee80211com *); 105 106 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 107 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 108 109 void 110 ieee80211_node_attach(struct ieee80211com *ic) 111 { 112 /* XXX really want maxlen enforced per-sta */ 113 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 114 "802.11 staging q"); 115 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 116 IEEE80211_INACT_INIT, ic->ic_max_keyix); 117 #if defined(__DragonFly__) 118 callout_init_mp(&ic->ic_inact); 119 #else 120 callout_init(&ic->ic_inact, 1); 121 #endif 122 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 123 ieee80211_node_timeout, ic); 124 125 ic->ic_node_alloc = node_alloc; 126 ic->ic_node_free = node_free; 127 ic->ic_node_cleanup = node_cleanup; 128 ic->ic_node_age = node_age; 129 ic->ic_node_drain = node_age; /* NB: same as age */ 130 ic->ic_node_getrssi = node_getrssi; 131 ic->ic_node_getsignal = node_getsignal; 132 ic->ic_node_getmimoinfo = node_getmimoinfo; 133 134 /* 135 * Set flags to be propagated to all vap's; 136 * these define default behaviour/configuration. 137 */ 138 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 139 } 140 141 void 142 ieee80211_node_detach(struct ieee80211com *ic) 143 { 144 145 callout_drain(&ic->ic_inact); 146 ieee80211_node_table_cleanup(&ic->ic_sta); 147 ieee80211_ageq_cleanup(&ic->ic_stageq); 148 } 149 150 void 151 ieee80211_node_vattach(struct ieee80211vap *vap) 152 { 153 /* NB: driver can override */ 154 vap->iv_max_aid = IEEE80211_AID_DEF; 155 156 /* default station inactivity timer setings */ 157 vap->iv_inact_init = IEEE80211_INACT_INIT; 158 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 159 vap->iv_inact_run = IEEE80211_INACT_RUN; 160 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 161 162 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 163 "%s: init %u auth %u run %u probe %u\n", __func__, 164 vap->iv_inact_init, vap->iv_inact_auth, 165 vap->iv_inact_run, vap->iv_inact_probe); 166 } 167 168 void 169 ieee80211_node_latevattach(struct ieee80211vap *vap) 170 { 171 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 172 /* XXX should we allow max aid to be zero? */ 173 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 174 vap->iv_max_aid = IEEE80211_AID_MIN; 175 if_printf(vap->iv_ifp, 176 "WARNING: max aid too small, changed to %d\n", 177 vap->iv_max_aid); 178 } 179 #if defined(__DragonFly__) 180 vap->iv_aid_bitmap = (uint32_t *) kmalloc( 181 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 182 M_80211_NODE, M_INTWAIT | M_ZERO); 183 #else 184 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( 185 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 186 M_80211_NODE, 187 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 188 #endif 189 if (vap->iv_aid_bitmap == NULL) { 190 /* XXX no way to recover */ 191 kprintf("%s: no memory for AID bitmap, max aid %d!\n", 192 __func__, vap->iv_max_aid); 193 vap->iv_max_aid = 0; 194 } 195 } 196 197 ieee80211_reset_bss(vap); 198 199 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 200 } 201 202 void 203 ieee80211_node_vdetach(struct ieee80211vap *vap) 204 { 205 struct ieee80211com *ic = vap->iv_ic; 206 207 ieee80211_node_table_reset(&ic->ic_sta, vap); 208 if (vap->iv_bss != NULL) { 209 ieee80211_free_node(vap->iv_bss); 210 vap->iv_bss = NULL; 211 } 212 if (vap->iv_aid_bitmap != NULL) { 213 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); 214 vap->iv_aid_bitmap = NULL; 215 } 216 } 217 218 /* 219 * Port authorize/unauthorize interfaces for use by an authenticator. 220 */ 221 222 void 223 ieee80211_node_authorize(struct ieee80211_node *ni) 224 { 225 struct ieee80211vap *vap = ni->ni_vap; 226 227 ni->ni_flags |= IEEE80211_NODE_AUTH; 228 ni->ni_inact_reload = vap->iv_inact_run; 229 ni->ni_inact = ni->ni_inact_reload; 230 231 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 232 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 233 } 234 235 void 236 ieee80211_node_unauthorize(struct ieee80211_node *ni) 237 { 238 struct ieee80211vap *vap = ni->ni_vap; 239 240 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 241 ni->ni_inact_reload = vap->iv_inact_auth; 242 if (ni->ni_inact > ni->ni_inact_reload) 243 ni->ni_inact = ni->ni_inact_reload; 244 245 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 246 "%s: inact_reload %u inact %u", __func__, 247 ni->ni_inact_reload, ni->ni_inact); 248 } 249 250 /* 251 * Fix tx parameters for a node according to ``association state''. 252 */ 253 void 254 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 255 { 256 struct ieee80211vap *vap = ni->ni_vap; 257 enum ieee80211_phymode mode; 258 259 if (ni->ni_flags & IEEE80211_NODE_HT) { 260 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 261 mode = IEEE80211_MODE_11NA; 262 else 263 mode = IEEE80211_MODE_11NG; 264 } else { /* legacy rate handling */ 265 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 266 mode = IEEE80211_MODE_STURBO_A; 267 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 268 mode = IEEE80211_MODE_HALF; 269 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 270 mode = IEEE80211_MODE_QUARTER; 271 /* NB: 108A should be handled as 11a */ 272 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 273 mode = IEEE80211_MODE_11A; 274 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 275 (ni->ni_flags & IEEE80211_NODE_ERP)) 276 mode = IEEE80211_MODE_11G; 277 else 278 mode = IEEE80211_MODE_11B; 279 } 280 ni->ni_txparms = &vap->iv_txparms[mode]; 281 } 282 283 /* 284 * Set/change the channel. The rate set is also updated as 285 * to insure a consistent view by drivers. 286 * XXX should be private but hostap needs it to deal with CSA 287 */ 288 void 289 ieee80211_node_set_chan(struct ieee80211_node *ni, 290 struct ieee80211_channel *chan) 291 { 292 struct ieee80211com *ic = ni->ni_ic; 293 struct ieee80211vap *vap = ni->ni_vap; 294 enum ieee80211_phymode mode; 295 296 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 297 298 ni->ni_chan = chan; 299 mode = ieee80211_chan2mode(chan); 300 if (IEEE80211_IS_CHAN_HT(chan)) { 301 /* 302 * We must install the legacy rate est in ni_rates and the 303 * HT rate set in ni_htrates. 304 */ 305 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 306 /* 307 * Setup bss tx parameters based on operating mode. We 308 * use legacy rates when operating in a mixed HT+non-HT bss 309 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 310 */ 311 if (mode == IEEE80211_MODE_11NA && 312 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 313 mode = IEEE80211_MODE_11A; 314 else if (mode == IEEE80211_MODE_11NG && 315 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 316 mode = IEEE80211_MODE_11G; 317 if (mode == IEEE80211_MODE_11G && 318 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 319 mode = IEEE80211_MODE_11B; 320 } 321 ni->ni_txparms = &vap->iv_txparms[mode]; 322 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 323 } 324 325 static __inline void 326 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 327 { 328 /* propagate useful state */ 329 nbss->ni_authmode = obss->ni_authmode; 330 nbss->ni_txpower = obss->ni_txpower; 331 nbss->ni_vlan = obss->ni_vlan; 332 /* XXX statistics? */ 333 /* XXX legacy WDS bssid? */ 334 } 335 336 void 337 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 338 { 339 struct ieee80211com *ic = vap->iv_ic; 340 struct ieee80211_node *ni; 341 342 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 343 "%s: creating %s on channel %u%c\n", __func__, 344 ieee80211_opmode_name[vap->iv_opmode], 345 ieee80211_chan2ieee(ic, chan), 346 ieee80211_channel_type_char(chan)); 347 348 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 349 if (ni == NULL) { 350 /* XXX recovery? */ 351 return; 352 } 353 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 354 ni->ni_esslen = vap->iv_des_ssid[0].len; 355 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 356 if (vap->iv_bss != NULL) 357 copy_bss(ni, vap->iv_bss); 358 ni->ni_intval = ic->ic_bintval; 359 if (vap->iv_flags & IEEE80211_F_PRIVACY) 360 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 361 if (ic->ic_phytype == IEEE80211_T_FH) { 362 ni->ni_fhdwell = 200; /* XXX */ 363 ni->ni_fhindex = 1; 364 } 365 if (vap->iv_opmode == IEEE80211_M_IBSS) { 366 vap->iv_flags |= IEEE80211_F_SIBSS; 367 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 368 if (vap->iv_flags & IEEE80211_F_DESBSSID) 369 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 370 else { 371 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 372 /* clear group bit, add local bit */ 373 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 374 } 375 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 376 if (vap->iv_flags & IEEE80211_F_DESBSSID) 377 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 378 else 379 #ifdef IEEE80211_SUPPORT_TDMA 380 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 381 #endif 382 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 383 #ifdef IEEE80211_SUPPORT_MESH 384 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 385 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 386 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 387 #endif 388 } 389 /* 390 * Fix the channel and related attributes. 391 */ 392 /* clear DFS CAC state on previous channel */ 393 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 394 ic->ic_bsschan->ic_freq != chan->ic_freq && 395 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 396 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 397 ic->ic_bsschan = chan; 398 ieee80211_node_set_chan(ni, chan); 399 ic->ic_curmode = ieee80211_chan2mode(chan); 400 /* 401 * Do mode-specific setup. 402 */ 403 if (IEEE80211_IS_CHAN_FULL(chan)) { 404 if (IEEE80211_IS_CHAN_ANYG(chan)) { 405 /* 406 * Use a mixed 11b/11g basic rate set. 407 */ 408 ieee80211_setbasicrates(&ni->ni_rates, 409 IEEE80211_MODE_11G); 410 if (vap->iv_flags & IEEE80211_F_PUREG) { 411 /* 412 * Also mark OFDM rates basic so 11b 413 * stations do not join (WiFi compliance). 414 */ 415 ieee80211_addbasicrates(&ni->ni_rates, 416 IEEE80211_MODE_11A); 417 } 418 } else if (IEEE80211_IS_CHAN_B(chan)) { 419 /* 420 * Force pure 11b rate set. 421 */ 422 ieee80211_setbasicrates(&ni->ni_rates, 423 IEEE80211_MODE_11B); 424 } 425 } 426 427 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 428 } 429 430 /* 431 * Reset bss state on transition to the INIT state. 432 * Clear any stations from the table (they have been 433 * deauth'd) and reset the bss node (clears key, rate 434 * etc. state). 435 */ 436 void 437 ieee80211_reset_bss(struct ieee80211vap *vap) 438 { 439 struct ieee80211com *ic = vap->iv_ic; 440 struct ieee80211_node *ni, *obss; 441 442 ieee80211_node_table_reset(&ic->ic_sta, vap); 443 /* XXX multi-bss: wrong */ 444 ieee80211_reset_erp(ic); 445 446 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 447 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 448 obss = vap->iv_bss; 449 vap->iv_bss = ieee80211_ref_node(ni); 450 if (obss != NULL) { 451 copy_bss(ni, obss); 452 ni->ni_intval = ic->ic_bintval; 453 ieee80211_free_node(obss); 454 } else 455 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 456 } 457 458 static int 459 match_ssid(const struct ieee80211_node *ni, 460 int nssid, const struct ieee80211_scan_ssid ssids[]) 461 { 462 int i; 463 464 for (i = 0; i < nssid; i++) { 465 if (ni->ni_esslen == ssids[i].len && 466 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 467 return 1; 468 } 469 return 0; 470 } 471 472 /* 473 * Test a node for suitability/compatibility. 474 */ 475 static int 476 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 477 { 478 struct ieee80211com *ic = ni->ni_ic; 479 uint8_t rate; 480 481 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 482 return 0; 483 if (vap->iv_opmode == IEEE80211_M_IBSS) { 484 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 485 return 0; 486 } else { 487 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 488 return 0; 489 } 490 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 491 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 492 return 0; 493 } else { 494 /* XXX does this mean privacy is supported or required? */ 495 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 496 return 0; 497 } 498 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 499 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 500 if (rate & IEEE80211_RATE_BASIC) 501 return 0; 502 if (vap->iv_des_nssid != 0 && 503 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 504 return 0; 505 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 506 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 507 return 0; 508 return 1; 509 } 510 511 #ifdef IEEE80211_DEBUG 512 /* 513 * Display node suitability/compatibility. 514 */ 515 static void 516 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 517 { 518 struct ieee80211com *ic = ni->ni_ic; 519 uint8_t rate; 520 int fail; 521 522 fail = 0; 523 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 524 fail |= 0x01; 525 if (vap->iv_opmode == IEEE80211_M_IBSS) { 526 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 527 fail |= 0x02; 528 } else { 529 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 530 fail |= 0x02; 531 } 532 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 533 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 534 fail |= 0x04; 535 } else { 536 /* XXX does this mean privacy is supported or required? */ 537 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 538 fail |= 0x04; 539 } 540 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 541 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 542 if (rate & IEEE80211_RATE_BASIC) 543 fail |= 0x08; 544 if (vap->iv_des_nssid != 0 && 545 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 546 fail |= 0x10; 547 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 548 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 549 fail |= 0x20; 550 551 kprintf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 552 kprintf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 553 kprintf(" %3d%c", 554 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 555 kprintf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 556 fail & 0x08 ? '!' : ' '); 557 kprintf(" %4s%c", 558 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 559 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 560 "????", 561 fail & 0x02 ? '!' : ' '); 562 kprintf(" %3s%c ", 563 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 564 fail & 0x04 ? '!' : ' '); 565 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 566 kprintf("%s\n", fail & 0x10 ? "!" : ""); 567 } 568 #endif /* IEEE80211_DEBUG */ 569 570 571 int 572 ieee80211_ibss_merge_check(struct ieee80211_node *ni) 573 { 574 struct ieee80211vap *vap = ni->ni_vap; 575 576 if (ni == vap->iv_bss || 577 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 578 /* unchanged, nothing to do */ 579 return 0; 580 } 581 582 if (!check_bss(vap, ni)) { 583 /* capabilities mismatch */ 584 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 585 "%s: merge failed, capabilities mismatch\n", __func__); 586 #ifdef IEEE80211_DEBUG 587 if (ieee80211_msg_assoc(vap)) 588 check_bss_debug(vap, ni); 589 #endif 590 vap->iv_stats.is_ibss_capmismatch++; 591 return 0; 592 } 593 594 return 1; 595 } 596 597 /* 598 * Handle 802.11 ad hoc network merge. The 599 * convention, set by the Wireless Ethernet Compatibility Alliance 600 * (WECA), is that an 802.11 station will change its BSSID to match 601 * the "oldest" 802.11 ad hoc network, on the same channel, that 602 * has the station's desired SSID. The "oldest" 802.11 network 603 * sends beacons with the greatest TSF timestamp. 604 * 605 * The caller is assumed to validate TSF's before attempting a merge. 606 * 607 * Return !0 if the BSSID changed, 0 otherwise. 608 */ 609 int 610 ieee80211_ibss_merge(struct ieee80211_node *ni) 611 { 612 #ifdef IEEE80211_DEBUG 613 struct ieee80211vap *vap = ni->ni_vap; 614 struct ieee80211com *ic = ni->ni_ic; 615 #endif 616 617 if (! ieee80211_ibss_merge_check(ni)) 618 return 0; 619 620 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 621 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 622 ether_sprintf(ni->ni_bssid), 623 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 624 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 625 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 626 ); 627 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 628 } 629 630 /* 631 * Calculate HT channel promotion flags for all vaps. 632 * This assumes ni_chan have been setup for each vap. 633 */ 634 static int 635 gethtadjustflags(struct ieee80211com *ic) 636 { 637 struct ieee80211vap *vap; 638 int flags; 639 640 flags = 0; 641 /* XXX locking */ 642 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 643 if (vap->iv_state < IEEE80211_S_RUN) 644 continue; 645 switch (vap->iv_opmode) { 646 case IEEE80211_M_WDS: 647 case IEEE80211_M_STA: 648 case IEEE80211_M_AHDEMO: 649 case IEEE80211_M_HOSTAP: 650 case IEEE80211_M_IBSS: 651 case IEEE80211_M_MBSS: 652 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 653 break; 654 default: 655 break; 656 } 657 } 658 return flags; 659 } 660 661 /* 662 * Check if the current channel needs to change based on whether 663 * any vap's are using HT20/HT40. This is used to sync the state 664 * of ic_curchan after a channel width change on a running vap. 665 */ 666 void 667 ieee80211_sync_curchan(struct ieee80211com *ic) 668 { 669 struct ieee80211_channel *c; 670 671 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 672 if (c != ic->ic_curchan) { 673 ic->ic_curchan = c; 674 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 675 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 676 IEEE80211_UNLOCK(ic); 677 ic->ic_set_channel(ic); 678 ieee80211_radiotap_chan_change(ic); 679 IEEE80211_LOCK(ic); 680 } 681 } 682 683 /* 684 * Setup the current channel. The request channel may be 685 * promoted if other vap's are operating with HT20/HT40. 686 */ 687 void 688 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 689 { 690 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 691 int flags = gethtadjustflags(ic); 692 /* 693 * Check for channel promotion required to support the 694 * set of running vap's. This assumes we are called 695 * after ni_chan is setup for each vap. 696 */ 697 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 698 if (flags > ieee80211_htchanflags(c)) 699 c = ieee80211_ht_adjust_channel(ic, c, flags); 700 } 701 ic->ic_bsschan = ic->ic_curchan = c; 702 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 703 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 704 } 705 706 /* 707 * Change the current channel. The channel change is guaranteed to have 708 * happened before the next state change. 709 */ 710 void 711 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 712 { 713 ieee80211_setupcurchan(ic, c); 714 ieee80211_runtask(ic, &ic->ic_chan_task); 715 } 716 717 void 718 ieee80211_update_chw(struct ieee80211com *ic) 719 { 720 721 ieee80211_setupcurchan(ic, ic->ic_curchan); 722 ieee80211_runtask(ic, &ic->ic_chw_task); 723 } 724 725 /* 726 * Join the specified IBSS/BSS network. The node is assumed to 727 * be passed in with a held reference. 728 */ 729 static int 730 ieee80211_sta_join1(struct ieee80211_node *selbs) 731 { 732 struct ieee80211vap *vap = selbs->ni_vap; 733 struct ieee80211com *ic = selbs->ni_ic; 734 struct ieee80211_node *obss; 735 int canreassoc; 736 737 /* 738 * Committed to selbs, setup state. 739 */ 740 obss = vap->iv_bss; 741 /* 742 * Check if old+new node have the same address in which 743 * case we can reassociate when operating in sta mode. 744 */ 745 canreassoc = (obss != NULL && 746 vap->iv_state == IEEE80211_S_RUN && 747 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 748 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 749 if (obss != NULL) { 750 struct ieee80211_node_table *nt = obss->ni_table; 751 752 copy_bss(selbs, obss); 753 ieee80211_node_decref(obss); /* iv_bss reference */ 754 755 IEEE80211_NODE_LOCK(nt); 756 node_reclaim(nt, obss); /* station table reference */ 757 IEEE80211_NODE_UNLOCK(nt); 758 759 obss = NULL; /* NB: guard against later use */ 760 } 761 762 /* 763 * Delete unusable rates; we've already checked 764 * that the negotiated rate set is acceptable. 765 */ 766 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 767 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 768 769 ieee80211_setcurchan(ic, selbs->ni_chan); 770 /* 771 * Set the erp state (mostly the slot time) to deal with 772 * the auto-select case; this should be redundant if the 773 * mode is locked. 774 */ 775 ieee80211_reset_erp(ic); 776 ieee80211_wme_initparams(vap); 777 778 if (vap->iv_opmode == IEEE80211_M_STA) { 779 if (canreassoc) { 780 /* Reassociate */ 781 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 782 } else { 783 /* 784 * Act as if we received a DEAUTH frame in case we 785 * are invoked from the RUN state. This will cause 786 * us to try to re-authenticate if we are operating 787 * as a station. 788 */ 789 ieee80211_new_state(vap, IEEE80211_S_AUTH, 790 IEEE80211_FC0_SUBTYPE_DEAUTH); 791 } 792 } else 793 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 794 return 1; 795 } 796 797 int 798 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 799 const struct ieee80211_scan_entry *se) 800 { 801 struct ieee80211com *ic = vap->iv_ic; 802 struct ieee80211_node *ni; 803 804 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 805 if (ni == NULL) { 806 /* XXX msg */ 807 return 0; 808 } 809 810 /* 811 * Expand scan state into node's format. 812 * XXX may not need all this stuff 813 */ 814 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 815 ni->ni_esslen = se->se_ssid[1]; 816 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 817 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 818 ni->ni_intval = se->se_intval; 819 ni->ni_capinfo = se->se_capinfo; 820 ni->ni_chan = chan; 821 ni->ni_timoff = se->se_timoff; 822 ni->ni_fhdwell = se->se_fhdwell; 823 ni->ni_fhindex = se->se_fhindex; 824 ni->ni_erp = se->se_erp; 825 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 826 ni->ni_noise = se->se_noise; 827 if (vap->iv_opmode == IEEE80211_M_STA) { 828 /* NB: only infrastructure mode requires an associd */ 829 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 830 } 831 832 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 833 ieee80211_ies_expand(&ni->ni_ies); 834 #ifdef IEEE80211_SUPPORT_SUPERG 835 if (ni->ni_ies.ath_ie != NULL) 836 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 837 #endif 838 if (ni->ni_ies.htcap_ie != NULL) 839 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 840 if (ni->ni_ies.htinfo_ie != NULL) 841 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 842 #ifdef IEEE80211_SUPPORT_MESH 843 if (ni->ni_ies.meshid_ie != NULL) 844 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 845 #endif 846 #ifdef IEEE80211_SUPPORT_TDMA 847 if (ni->ni_ies.tdma_ie != NULL) 848 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 849 #endif 850 } 851 852 vap->iv_dtim_period = se->se_dtimperiod; 853 vap->iv_dtim_count = 0; 854 855 /* NB: must be after ni_chan is setup */ 856 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 857 IEEE80211_F_DOSORT); 858 if (ieee80211_iserp_rateset(&ni->ni_rates)) 859 ni->ni_flags |= IEEE80211_NODE_ERP; 860 861 /* 862 * Setup HT state for this node if it's available, otherwise 863 * non-STA modes won't pick this state up. 864 * 865 * For IBSS and related modes that don't go through an 866 * association request/response, the only appropriate place 867 * to setup the HT state is here. 868 */ 869 if (ni->ni_ies.htinfo_ie != NULL && 870 ni->ni_ies.htcap_ie != NULL && 871 vap->iv_flags_ht & IEEE80211_FHT_HT) { 872 ieee80211_ht_node_init(ni); 873 ieee80211_ht_updateparams(ni, 874 ni->ni_ies.htcap_ie, 875 ni->ni_ies.htinfo_ie); 876 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 877 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 878 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 879 } 880 /* XXX else check for ath FF? */ 881 /* XXX QoS? Difficult given that WME config is specific to a master */ 882 883 ieee80211_node_setuptxparms(ni); 884 ieee80211_ratectl_node_init(ni); 885 886 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 887 } 888 889 /* 890 * Leave the specified IBSS/BSS network. The node is assumed to 891 * be passed in with a held reference. 892 */ 893 void 894 ieee80211_sta_leave(struct ieee80211_node *ni) 895 { 896 struct ieee80211com *ic = ni->ni_ic; 897 898 ic->ic_node_cleanup(ni); 899 ieee80211_notify_node_leave(ni); 900 } 901 902 /* 903 * Send a deauthenticate frame and drop the station. 904 */ 905 void 906 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 907 { 908 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 909 ieee80211_ref_node(ni); 910 if (ni->ni_associd != 0) 911 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 912 ieee80211_node_leave(ni); 913 ieee80211_free_node(ni); 914 } 915 916 static struct ieee80211_node * 917 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 918 { 919 struct ieee80211_node *ni; 920 921 #if defined(__DragonFly__) 922 ni = (struct ieee80211_node *) kmalloc(sizeof(struct ieee80211_node), 923 M_80211_NODE, M_INTWAIT | M_ZERO); 924 #else 925 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), 926 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 927 #endif 928 return ni; 929 } 930 931 /* 932 * Initialize an ie blob with the specified data. If previous 933 * data exists re-use the data block. As a side effect we clear 934 * all references to specific ie's; the caller is required to 935 * recalculate them. 936 */ 937 int 938 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 939 { 940 /* NB: assumes data+len are the last fields */ 941 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 942 if (ies->data != NULL && ies->len != len) { 943 /* data size changed */ 944 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 945 ies->data = NULL; 946 } 947 if (ies->data == NULL) { 948 #if defined(__DragonFly__) 949 ies->data = (uint8_t *) kmalloc(len, 950 M_80211_NODE_IE, M_INTWAIT | M_ZERO); 951 #else 952 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 953 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 954 955 #endif 956 if (ies->data == NULL) { 957 ies->len = 0; 958 /* NB: pointers have already been zero'd above */ 959 return 0; 960 } 961 } 962 memcpy(ies->data, data, len); 963 ies->len = len; 964 return 1; 965 } 966 967 /* 968 * Reclaim storage for an ie blob. 969 */ 970 void 971 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 972 { 973 if (ies->data != NULL) 974 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 975 } 976 977 /* 978 * Expand an ie blob data contents and to fillin individual 979 * ie pointers. The data blob is assumed to be well-formed; 980 * we don't do any validity checking of ie lengths. 981 */ 982 void 983 ieee80211_ies_expand(struct ieee80211_ies *ies) 984 { 985 uint8_t *ie; 986 int ielen; 987 988 ie = ies->data; 989 ielen = ies->len; 990 while (ielen > 0) { 991 switch (ie[0]) { 992 case IEEE80211_ELEMID_VENDOR: 993 if (iswpaoui(ie)) 994 ies->wpa_ie = ie; 995 else if (iswmeoui(ie)) 996 ies->wme_ie = ie; 997 #ifdef IEEE80211_SUPPORT_SUPERG 998 else if (isatherosoui(ie)) 999 ies->ath_ie = ie; 1000 #endif 1001 #ifdef IEEE80211_SUPPORT_TDMA 1002 else if (istdmaoui(ie)) 1003 ies->tdma_ie = ie; 1004 #endif 1005 break; 1006 case IEEE80211_ELEMID_RSN: 1007 ies->rsn_ie = ie; 1008 break; 1009 case IEEE80211_ELEMID_HTCAP: 1010 ies->htcap_ie = ie; 1011 break; 1012 case IEEE80211_ELEMID_HTINFO: 1013 ies->htinfo_ie = ie; 1014 break; 1015 #ifdef IEEE80211_SUPPORT_MESH 1016 case IEEE80211_ELEMID_MESHID: 1017 ies->meshid_ie = ie; 1018 break; 1019 #endif 1020 } 1021 ielen -= 2 + ie[1]; 1022 ie += 2 + ie[1]; 1023 } 1024 } 1025 1026 /* 1027 * Reclaim any resources in a node and reset any critical 1028 * state. Typically nodes are free'd immediately after, 1029 * but in some cases the storage may be reused so we need 1030 * to insure consistent state (should probably fix that). 1031 */ 1032 static void 1033 node_cleanup(struct ieee80211_node *ni) 1034 { 1035 struct ieee80211vap *vap = ni->ni_vap; 1036 struct ieee80211com *ic = ni->ni_ic; 1037 int i; 1038 1039 /* NB: preserve ni_table */ 1040 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1041 if (vap->iv_opmode != IEEE80211_M_STA) 1042 vap->iv_ps_sta--; 1043 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1044 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1045 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1046 } 1047 /* 1048 * Cleanup any HT-related state. 1049 */ 1050 if (ni->ni_flags & IEEE80211_NODE_HT) 1051 ieee80211_ht_node_cleanup(ni); 1052 #ifdef IEEE80211_SUPPORT_SUPERG 1053 /* Always do FF node cleanup; for A-MSDU */ 1054 ieee80211_ff_node_cleanup(ni); 1055 #endif 1056 #ifdef IEEE80211_SUPPORT_MESH 1057 /* 1058 * Cleanup any mesh-related state. 1059 */ 1060 if (vap->iv_opmode == IEEE80211_M_MBSS) 1061 ieee80211_mesh_node_cleanup(ni); 1062 #endif 1063 /* 1064 * Clear any staging queue entries. 1065 */ 1066 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1067 1068 /* 1069 * Clear AREF flag that marks the authorization refcnt bump 1070 * has happened. This is probably not needed as the node 1071 * should always be removed from the table so not found but 1072 * do it just in case. 1073 * Likewise clear the ASSOCID flag as these flags are intended 1074 * to be managed in tandem. 1075 */ 1076 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1077 1078 /* 1079 * Drain power save queue and, if needed, clear TIM. 1080 */ 1081 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1082 vap->iv_set_tim(ni, 0); 1083 1084 ni->ni_associd = 0; 1085 if (ni->ni_challenge != NULL) { 1086 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1087 ni->ni_challenge = NULL; 1088 } 1089 /* 1090 * Preserve SSID, WPA, and WME ie's so the bss node is 1091 * reusable during a re-auth/re-assoc state transition. 1092 * If we remove these data they will not be recreated 1093 * because they come from a probe-response or beacon frame 1094 * which cannot be expected prior to the association-response. 1095 * This should not be an issue when operating in other modes 1096 * as stations leaving always go through a full state transition 1097 * which will rebuild this state. 1098 * 1099 * XXX does this leave us open to inheriting old state? 1100 */ 1101 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1102 if (ni->ni_rxfrag[i] != NULL) { 1103 m_freem(ni->ni_rxfrag[i]); 1104 ni->ni_rxfrag[i] = NULL; 1105 } 1106 /* 1107 * Must be careful here to remove any key map entry w/o a LOR. 1108 */ 1109 ieee80211_node_delucastkey(ni); 1110 } 1111 1112 static void 1113 node_free(struct ieee80211_node *ni) 1114 { 1115 struct ieee80211com *ic = ni->ni_ic; 1116 1117 ieee80211_ratectl_node_deinit(ni); 1118 ic->ic_node_cleanup(ni); 1119 ieee80211_ies_cleanup(&ni->ni_ies); 1120 ieee80211_psq_cleanup(&ni->ni_psq); 1121 IEEE80211_FREE(ni, M_80211_NODE); 1122 } 1123 1124 static void 1125 node_age(struct ieee80211_node *ni) 1126 { 1127 struct ieee80211vap *vap = ni->ni_vap; 1128 1129 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta); 1130 1131 /* 1132 * Age frames on the power save queue. 1133 */ 1134 if (ieee80211_node_psq_age(ni) != 0 && 1135 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1136 vap->iv_set_tim(ni, 0); 1137 /* 1138 * Age out HT resources (e.g. frames on the 1139 * A-MPDU reorder queues). 1140 */ 1141 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1142 ieee80211_ht_node_age(ni); 1143 } 1144 1145 static int8_t 1146 node_getrssi(const struct ieee80211_node *ni) 1147 { 1148 uint32_t avgrssi = ni->ni_avgrssi; 1149 int32_t rssi; 1150 1151 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1152 return 0; 1153 rssi = IEEE80211_RSSI_GET(avgrssi); 1154 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1155 } 1156 1157 static void 1158 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1159 { 1160 *rssi = node_getrssi(ni); 1161 *noise = ni->ni_noise; 1162 } 1163 1164 static void 1165 node_getmimoinfo(const struct ieee80211_node *ni, 1166 struct ieee80211_mimo_info *info) 1167 { 1168 int i; 1169 uint32_t avgrssi; 1170 int32_t rssi; 1171 1172 bzero(info, sizeof(*info)); 1173 1174 for (i = 0; i < ni->ni_mimo_chains; i++) { 1175 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1176 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1177 info->rssi[i] = 0; 1178 } else { 1179 rssi = IEEE80211_RSSI_GET(avgrssi); 1180 info->rssi[i] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1181 } 1182 info->noise[i] = ni->ni_mimo_noise_ctl[i]; 1183 } 1184 1185 /* XXX ext radios? */ 1186 1187 /* XXX EVM? */ 1188 } 1189 1190 struct ieee80211_node * 1191 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1192 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1193 { 1194 struct ieee80211com *ic = nt->nt_ic; 1195 struct ieee80211_node *ni; 1196 int hash; 1197 1198 ni = ic->ic_node_alloc(vap, macaddr); 1199 if (ni == NULL) { 1200 vap->iv_stats.is_rx_nodealloc++; 1201 return NULL; 1202 } 1203 1204 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1205 "%s %p<%s> in %s table\n", __func__, ni, 1206 ether_sprintf(macaddr), nt->nt_name); 1207 1208 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1209 hash = IEEE80211_NODE_HASH(ic, macaddr); 1210 ieee80211_node_initref(ni); /* mark referenced */ 1211 ni->ni_chan = IEEE80211_CHAN_ANYC; 1212 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1213 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1214 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1215 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1216 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1217 ni->ni_inact_reload = nt->nt_inact_init; 1218 ni->ni_inact = ni->ni_inact_reload; 1219 ni->ni_ath_defkeyix = 0x7fff; 1220 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1221 #ifdef IEEE80211_SUPPORT_MESH 1222 if (vap->iv_opmode == IEEE80211_M_MBSS) 1223 ieee80211_mesh_node_init(vap, ni); 1224 #endif 1225 IEEE80211_NODE_LOCK(nt); 1226 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1227 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1228 ni->ni_table = nt; 1229 ni->ni_vap = vap; 1230 ni->ni_ic = ic; 1231 IEEE80211_NODE_UNLOCK(nt); 1232 1233 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1234 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1235 1236 ieee80211_ratectl_node_init(ni); 1237 1238 return ni; 1239 } 1240 1241 /* 1242 * Craft a temporary node suitable for sending a management frame 1243 * to the specified station. We craft only as much state as we 1244 * need to do the work since the node will be immediately reclaimed 1245 * once the send completes. 1246 */ 1247 struct ieee80211_node * 1248 ieee80211_tmp_node(struct ieee80211vap *vap, 1249 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1250 { 1251 struct ieee80211com *ic = vap->iv_ic; 1252 struct ieee80211_node *ni; 1253 1254 ni = ic->ic_node_alloc(vap, macaddr); 1255 if (ni != NULL) { 1256 struct ieee80211_node *bss = vap->iv_bss; 1257 1258 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1259 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1260 1261 ni->ni_table = NULL; /* NB: pedantic */ 1262 ni->ni_ic = ic; /* NB: needed to set channel */ 1263 ni->ni_vap = vap; 1264 1265 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1266 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1267 ieee80211_node_initref(ni); /* mark referenced */ 1268 /* NB: required by ieee80211_fix_rate */ 1269 ieee80211_node_set_chan(ni, bss->ni_chan); 1270 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1271 IEEE80211_KEYIX_NONE); 1272 ni->ni_txpower = bss->ni_txpower; 1273 /* XXX optimize away */ 1274 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1275 1276 ieee80211_ratectl_node_init(ni); 1277 } else { 1278 /* XXX msg */ 1279 vap->iv_stats.is_rx_nodealloc++; 1280 } 1281 return ni; 1282 } 1283 1284 struct ieee80211_node * 1285 ieee80211_dup_bss(struct ieee80211vap *vap, 1286 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1287 { 1288 struct ieee80211com *ic = vap->iv_ic; 1289 struct ieee80211_node *ni; 1290 1291 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1292 if (ni != NULL) { 1293 struct ieee80211_node *bss = vap->iv_bss; 1294 /* 1295 * Inherit from iv_bss. 1296 */ 1297 copy_bss(ni, bss); 1298 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1299 ieee80211_node_set_chan(ni, bss->ni_chan); 1300 } 1301 return ni; 1302 } 1303 1304 /* 1305 * Create a bss node for a legacy WDS vap. The far end does 1306 * not associate so we just create create a new node and 1307 * simulate an association. The caller is responsible for 1308 * installing the node as the bss node and handling any further 1309 * setup work like authorizing the port. 1310 */ 1311 struct ieee80211_node * 1312 ieee80211_node_create_wds(struct ieee80211vap *vap, 1313 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1314 { 1315 struct ieee80211com *ic = vap->iv_ic; 1316 struct ieee80211_node *ni; 1317 1318 /* XXX check if node already in sta table? */ 1319 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1320 if (ni != NULL) { 1321 ni->ni_wdsvap = vap; 1322 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1323 /* 1324 * Inherit any manually configured settings. 1325 */ 1326 copy_bss(ni, vap->iv_bss); 1327 ieee80211_node_set_chan(ni, chan); 1328 /* NB: propagate ssid so available to WPA supplicant */ 1329 ni->ni_esslen = vap->iv_des_ssid[0].len; 1330 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1331 /* NB: no associd for peer */ 1332 /* 1333 * There are no management frames to use to 1334 * discover neighbor capabilities, so blindly 1335 * propagate the local configuration. 1336 */ 1337 if (vap->iv_flags & IEEE80211_F_WME) 1338 ni->ni_flags |= IEEE80211_NODE_QOS; 1339 #ifdef IEEE80211_SUPPORT_SUPERG 1340 if (vap->iv_flags & IEEE80211_F_FF) 1341 ni->ni_flags |= IEEE80211_NODE_FF; 1342 #endif 1343 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1344 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1345 /* 1346 * Device is HT-capable and HT is enabled for 1347 * the vap; setup HT operation. On return 1348 * ni_chan will be adjusted to an HT channel. 1349 */ 1350 ieee80211_ht_wds_init(ni); 1351 } else { 1352 struct ieee80211_channel *c = ni->ni_chan; 1353 /* 1354 * Force a legacy channel to be used. 1355 */ 1356 c = ieee80211_find_channel(ic, 1357 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1358 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1359 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1360 ni->ni_chan = c; 1361 } 1362 } 1363 return ni; 1364 } 1365 1366 struct ieee80211_node * 1367 #ifdef IEEE80211_DEBUG_REFCNT 1368 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1369 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1370 #else 1371 ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1372 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1373 #endif 1374 { 1375 struct ieee80211_node *ni; 1376 int hash; 1377 1378 IEEE80211_NODE_LOCK_ASSERT(nt); 1379 1380 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1381 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1382 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1383 ieee80211_ref_node(ni); /* mark referenced */ 1384 #ifdef IEEE80211_DEBUG_REFCNT 1385 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1386 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1387 func, line, 1388 ni, ether_sprintf(ni->ni_macaddr), 1389 ieee80211_node_refcnt(ni)); 1390 #endif 1391 return ni; 1392 } 1393 } 1394 return NULL; 1395 } 1396 1397 struct ieee80211_node * 1398 #ifdef IEEE80211_DEBUG_REFCNT 1399 ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1400 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1401 #else 1402 ieee80211_find_node(struct ieee80211_node_table *nt, 1403 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1404 #endif 1405 { 1406 struct ieee80211_node *ni; 1407 1408 IEEE80211_NODE_LOCK(nt); 1409 ni = ieee80211_find_node_locked(nt, macaddr); 1410 IEEE80211_NODE_UNLOCK(nt); 1411 return ni; 1412 } 1413 1414 struct ieee80211_node * 1415 #ifdef IEEE80211_DEBUG_REFCNT 1416 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1417 const struct ieee80211vap *vap, 1418 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1419 #else 1420 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1421 const struct ieee80211vap *vap, 1422 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1423 #endif 1424 { 1425 struct ieee80211_node *ni; 1426 int hash; 1427 1428 IEEE80211_NODE_LOCK_ASSERT(nt); 1429 1430 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1431 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1432 if (ni->ni_vap == vap && 1433 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1434 ieee80211_ref_node(ni); /* mark referenced */ 1435 #ifdef IEEE80211_DEBUG_REFCNT 1436 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1437 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1438 func, line, 1439 ni, ether_sprintf(ni->ni_macaddr), 1440 ieee80211_node_refcnt(ni)); 1441 #endif 1442 return ni; 1443 } 1444 } 1445 return NULL; 1446 } 1447 1448 struct ieee80211_node * 1449 #ifdef IEEE80211_DEBUG_REFCNT 1450 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1451 const struct ieee80211vap *vap, 1452 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1453 #else 1454 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1455 const struct ieee80211vap *vap, 1456 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1457 #endif 1458 { 1459 struct ieee80211_node *ni; 1460 1461 IEEE80211_NODE_LOCK(nt); 1462 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1463 IEEE80211_NODE_UNLOCK(nt); 1464 return ni; 1465 } 1466 1467 /* 1468 * Fake up a node; this handles node discovery in adhoc mode. 1469 * Note that for the driver's benefit we we treat this like 1470 * an association so the driver has an opportunity to setup 1471 * it's private state. 1472 */ 1473 struct ieee80211_node * 1474 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1475 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1476 { 1477 struct ieee80211_node *ni; 1478 1479 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1480 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1481 ni = ieee80211_dup_bss(vap, macaddr); 1482 if (ni != NULL) { 1483 struct ieee80211com *ic = vap->iv_ic; 1484 1485 /* XXX no rate negotiation; just dup */ 1486 ni->ni_rates = vap->iv_bss->ni_rates; 1487 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1488 ni->ni_flags |= IEEE80211_NODE_ERP; 1489 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1490 /* 1491 * In adhoc demo mode there are no management 1492 * frames to use to discover neighbor capabilities, 1493 * so blindly propagate the local configuration 1494 * so we can do interesting things (e.g. use 1495 * WME to disable ACK's). 1496 */ 1497 if (vap->iv_flags & IEEE80211_F_WME) 1498 ni->ni_flags |= IEEE80211_NODE_QOS; 1499 #ifdef IEEE80211_SUPPORT_SUPERG 1500 if (vap->iv_flags & IEEE80211_F_FF) 1501 ni->ni_flags |= IEEE80211_NODE_FF; 1502 #endif 1503 } 1504 ieee80211_node_setuptxparms(ni); 1505 ieee80211_ratectl_node_init(ni); 1506 if (ic->ic_newassoc != NULL) 1507 ic->ic_newassoc(ni, 1); 1508 /* XXX not right for 802.1x/WPA */ 1509 ieee80211_node_authorize(ni); 1510 } 1511 return ni; 1512 } 1513 1514 void 1515 ieee80211_init_neighbor(struct ieee80211_node *ni, 1516 const struct ieee80211_frame *wh, 1517 const struct ieee80211_scanparams *sp) 1518 { 1519 int do_ht_setup = 0; 1520 1521 ni->ni_esslen = sp->ssid[1]; 1522 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1523 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1524 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1525 ni->ni_intval = sp->bintval; 1526 ni->ni_capinfo = sp->capinfo; 1527 ni->ni_chan = ni->ni_ic->ic_curchan; 1528 ni->ni_fhdwell = sp->fhdwell; 1529 ni->ni_fhindex = sp->fhindex; 1530 ni->ni_erp = sp->erp; 1531 ni->ni_timoff = sp->timoff; 1532 #ifdef IEEE80211_SUPPORT_MESH 1533 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1534 ieee80211_mesh_init_neighbor(ni, wh, sp); 1535 #endif 1536 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1537 ieee80211_ies_expand(&ni->ni_ies); 1538 if (ni->ni_ies.wme_ie != NULL) 1539 ni->ni_flags |= IEEE80211_NODE_QOS; 1540 else 1541 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1542 #ifdef IEEE80211_SUPPORT_SUPERG 1543 if (ni->ni_ies.ath_ie != NULL) 1544 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1545 #endif 1546 if (ni->ni_ies.htcap_ie != NULL) 1547 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1548 if (ni->ni_ies.htinfo_ie != NULL) 1549 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1550 1551 if ((ni->ni_ies.htcap_ie != NULL) && 1552 (ni->ni_ies.htinfo_ie != NULL) && 1553 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1554 do_ht_setup = 1; 1555 } 1556 } 1557 1558 /* NB: must be after ni_chan is setup */ 1559 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1560 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1561 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1562 1563 /* 1564 * If the neighbor is HT compatible, flip that on. 1565 */ 1566 if (do_ht_setup) { 1567 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1568 "%s: doing HT setup\n", __func__); 1569 ieee80211_ht_node_init(ni); 1570 ieee80211_ht_updateparams(ni, 1571 ni->ni_ies.htcap_ie, 1572 ni->ni_ies.htinfo_ie); 1573 ieee80211_setup_htrates(ni, 1574 ni->ni_ies.htcap_ie, 1575 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1576 ieee80211_setup_basic_htrates(ni, 1577 ni->ni_ies.htinfo_ie); 1578 ieee80211_node_setuptxparms(ni); 1579 ieee80211_ratectl_node_init(ni); 1580 } 1581 } 1582 1583 /* 1584 * Do node discovery in adhoc mode on receipt of a beacon 1585 * or probe response frame. Note that for the driver's 1586 * benefit we we treat this like an association so the 1587 * driver has an opportunity to setup it's private state. 1588 */ 1589 struct ieee80211_node * 1590 ieee80211_add_neighbor(struct ieee80211vap *vap, 1591 const struct ieee80211_frame *wh, 1592 const struct ieee80211_scanparams *sp) 1593 { 1594 struct ieee80211_node *ni; 1595 1596 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1597 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1598 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1599 if (ni != NULL) { 1600 struct ieee80211com *ic = vap->iv_ic; 1601 1602 ieee80211_init_neighbor(ni, wh, sp); 1603 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1604 ni->ni_flags |= IEEE80211_NODE_ERP; 1605 ieee80211_node_setuptxparms(ni); 1606 ieee80211_ratectl_node_init(ni); 1607 if (ic->ic_newassoc != NULL) 1608 ic->ic_newassoc(ni, 1); 1609 /* XXX not right for 802.1x/WPA */ 1610 ieee80211_node_authorize(ni); 1611 } 1612 return ni; 1613 } 1614 1615 #define IS_PROBEREQ(wh) \ 1616 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1617 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1618 #define IS_BCAST_PROBEREQ(wh) \ 1619 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1620 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1621 1622 static __inline struct ieee80211_node * 1623 _find_rxnode(struct ieee80211_node_table *nt, 1624 const struct ieee80211_frame_min *wh) 1625 { 1626 if (IS_BCAST_PROBEREQ(wh)) 1627 return NULL; /* spam bcast probe req to all vap's */ 1628 return ieee80211_find_node_locked(nt, wh->i_addr2); 1629 } 1630 1631 /* 1632 * Locate the node for sender, track state, and then pass the 1633 * (referenced) node up to the 802.11 layer for its use. Note 1634 * we can return NULL if the sender is not in the table. 1635 */ 1636 struct ieee80211_node * 1637 #ifdef IEEE80211_DEBUG_REFCNT 1638 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1639 const struct ieee80211_frame_min *wh, const char *func, int line) 1640 #else 1641 ieee80211_find_rxnode(struct ieee80211com *ic, 1642 const struct ieee80211_frame_min *wh) 1643 #endif 1644 { 1645 struct ieee80211_node_table *nt; 1646 struct ieee80211_node *ni; 1647 1648 nt = &ic->ic_sta; 1649 IEEE80211_NODE_LOCK(nt); 1650 ni = _find_rxnode(nt, wh); 1651 IEEE80211_NODE_UNLOCK(nt); 1652 1653 return ni; 1654 } 1655 1656 /* 1657 * Like ieee80211_find_rxnode but use the supplied h/w 1658 * key index as a hint to locate the node in the key 1659 * mapping table. If an entry is present at the key 1660 * index we return it; otherwise do a normal lookup and 1661 * update the mapping table if the station has a unicast 1662 * key assigned to it. 1663 */ 1664 struct ieee80211_node * 1665 #ifdef IEEE80211_DEBUG_REFCNT 1666 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1667 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1668 const char *func, int line) 1669 #else 1670 ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1671 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1672 #endif 1673 { 1674 struct ieee80211_node_table *nt; 1675 struct ieee80211_node *ni; 1676 1677 nt = &ic->ic_sta; 1678 IEEE80211_NODE_LOCK(nt); 1679 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1680 ni = nt->nt_keyixmap[keyix]; 1681 else 1682 ni = NULL; 1683 if (ni == NULL) { 1684 ni = _find_rxnode(nt, wh); 1685 if (ni != NULL && nt->nt_keyixmap != NULL) { 1686 /* 1687 * If the station has a unicast key cache slot 1688 * assigned update the key->node mapping table. 1689 */ 1690 keyix = ni->ni_ucastkey.wk_rxkeyix; 1691 /* XXX can keyixmap[keyix] != NULL? */ 1692 if (keyix < nt->nt_keyixmax && 1693 nt->nt_keyixmap[keyix] == NULL) { 1694 IEEE80211_DPRINTF(ni->ni_vap, 1695 IEEE80211_MSG_NODE, 1696 "%s: add key map entry %p<%s> refcnt %d\n", 1697 __func__, ni, ether_sprintf(ni->ni_macaddr), 1698 ieee80211_node_refcnt(ni)+1); 1699 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1700 } 1701 } 1702 } else { 1703 if (IS_BCAST_PROBEREQ(wh)) 1704 ni = NULL; /* spam bcast probe req to all vap's */ 1705 else 1706 ieee80211_ref_node(ni); 1707 } 1708 IEEE80211_NODE_UNLOCK(nt); 1709 1710 return ni; 1711 } 1712 #undef IS_BCAST_PROBEREQ 1713 #undef IS_PROBEREQ 1714 1715 /* 1716 * Return a reference to the appropriate node for sending 1717 * a data frame. This handles node discovery in adhoc networks. 1718 */ 1719 struct ieee80211_node * 1720 #ifdef IEEE80211_DEBUG_REFCNT 1721 ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1722 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1723 const char *func, int line) 1724 #else 1725 ieee80211_find_txnode(struct ieee80211vap *vap, 1726 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1727 #endif 1728 { 1729 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1730 struct ieee80211_node *ni; 1731 1732 /* 1733 * The destination address should be in the node table 1734 * unless this is a multicast/broadcast frame. We can 1735 * also optimize station mode operation, all frames go 1736 * to the bss node. 1737 */ 1738 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1739 IEEE80211_NODE_LOCK(nt); 1740 if (vap->iv_opmode == IEEE80211_M_STA || 1741 vap->iv_opmode == IEEE80211_M_WDS || 1742 IEEE80211_IS_MULTICAST(macaddr)) 1743 ni = ieee80211_ref_node(vap->iv_bss); 1744 else 1745 ni = ieee80211_find_node_locked(nt, macaddr); 1746 IEEE80211_NODE_UNLOCK(nt); 1747 1748 if (ni == NULL) { 1749 if (vap->iv_opmode == IEEE80211_M_IBSS || 1750 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1751 /* 1752 * In adhoc mode cons up a node for the destination. 1753 * Note that we need an additional reference for the 1754 * caller to be consistent with 1755 * ieee80211_find_node_locked. 1756 */ 1757 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1758 if (ni != NULL) 1759 (void) ieee80211_ref_node(ni); 1760 } else { 1761 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1762 "no node, discard frame (%s)", __func__); 1763 vap->iv_stats.is_tx_nonode++; 1764 } 1765 } 1766 return ni; 1767 } 1768 1769 static void 1770 _ieee80211_free_node(struct ieee80211_node *ni) 1771 { 1772 struct ieee80211_node_table *nt = ni->ni_table; 1773 1774 /* 1775 * NB: careful about referencing the vap as it may be 1776 * gone if the last reference was held by a driver. 1777 * We know the com will always be present so it's safe 1778 * to use ni_ic below to reclaim resources. 1779 */ 1780 #if 0 1781 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1782 "%s %p<%s> in %s table\n", __func__, ni, 1783 ether_sprintf(ni->ni_macaddr), 1784 nt != NULL ? nt->nt_name : "<gone>"); 1785 #endif 1786 if (ni->ni_associd != 0) { 1787 struct ieee80211vap *vap = ni->ni_vap; 1788 if (vap->iv_aid_bitmap != NULL) 1789 IEEE80211_AID_CLR(vap, ni->ni_associd); 1790 } 1791 if (nt != NULL) { 1792 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1793 LIST_REMOVE(ni, ni_hash); 1794 } 1795 ni->ni_ic->ic_node_free(ni); 1796 } 1797 1798 /* 1799 * Clear any entry in the unicast key mapping table. 1800 */ 1801 static int 1802 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1803 { 1804 ieee80211_keyix keyix; 1805 1806 keyix = ni->ni_ucastkey.wk_rxkeyix; 1807 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1808 nt->nt_keyixmap[keyix] == ni) { 1809 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1810 "%s: %p<%s> clear key map entry %u\n", 1811 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 1812 nt->nt_keyixmap[keyix] = NULL; 1813 ieee80211_node_decref(ni); 1814 return 1; 1815 } 1816 1817 return 0; 1818 } 1819 1820 void 1821 #ifdef IEEE80211_DEBUG_REFCNT 1822 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1823 #else 1824 ieee80211_free_node(struct ieee80211_node *ni) 1825 #endif 1826 { 1827 struct ieee80211_node_table *nt = ni->ni_table; 1828 1829 #ifdef IEEE80211_DEBUG_REFCNT 1830 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1831 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1832 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1833 #endif 1834 if (nt != NULL) { 1835 IEEE80211_NODE_LOCK(nt); 1836 if (ieee80211_node_dectestref(ni)) { 1837 /* 1838 * Last reference, reclaim state. 1839 */ 1840 _ieee80211_free_node(ni); 1841 } else if (ieee80211_node_refcnt(ni) == 1) 1842 if (node_clear_keyixmap(nt, ni)) 1843 _ieee80211_free_node(ni); 1844 IEEE80211_NODE_UNLOCK(nt); 1845 } else { 1846 if (ieee80211_node_dectestref(ni)) 1847 _ieee80211_free_node(ni); 1848 } 1849 } 1850 1851 /* 1852 * Reclaim a unicast key and clear any key cache state. 1853 */ 1854 int 1855 ieee80211_node_delucastkey(struct ieee80211_node *ni) 1856 { 1857 struct ieee80211com *ic = ni->ni_ic; 1858 struct ieee80211_node_table *nt = &ic->ic_sta; 1859 struct ieee80211_node *nikey; 1860 ieee80211_keyix keyix; 1861 int isowned, status; 1862 1863 /* 1864 * NB: We must beware of LOR here; deleting the key 1865 * can cause the crypto layer to block traffic updates 1866 * which can generate a LOR against the node table lock; 1867 * grab it here and stash the key index for our use below. 1868 * 1869 * Must also beware of recursion on the node table lock. 1870 * When called from node_cleanup we may already have 1871 * the node table lock held. Unfortunately there's no 1872 * way to separate out this path so we must do this 1873 * conditionally. 1874 */ 1875 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1876 if (!isowned) 1877 IEEE80211_NODE_LOCK(nt); 1878 nikey = NULL; 1879 status = 1; /* NB: success */ 1880 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1881 keyix = ni->ni_ucastkey.wk_rxkeyix; 1882 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1883 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1884 nikey = nt->nt_keyixmap[keyix]; 1885 nt->nt_keyixmap[keyix] = NULL; 1886 } 1887 } 1888 if (!isowned) 1889 IEEE80211_NODE_UNLOCK(nt); 1890 1891 if (nikey != NULL) { 1892 KASSERT(nikey == ni, 1893 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1894 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1895 "%s: delete key map entry %p<%s> refcnt %d\n", 1896 __func__, ni, ether_sprintf(ni->ni_macaddr), 1897 ieee80211_node_refcnt(ni)-1); 1898 ieee80211_free_node(ni); 1899 } 1900 return status; 1901 } 1902 1903 /* 1904 * Reclaim a node. If this is the last reference count then 1905 * do the normal free work. Otherwise remove it from the node 1906 * table and mark it gone by clearing the back-reference. 1907 */ 1908 static void 1909 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1910 { 1911 1912 IEEE80211_NODE_LOCK_ASSERT(nt); 1913 1914 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1915 "%s: remove %p<%s> from %s table, refcnt %d\n", 1916 __func__, ni, ether_sprintf(ni->ni_macaddr), 1917 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1918 /* 1919 * Clear any entry in the unicast key mapping table. 1920 * We need to do it here so rx lookups don't find it 1921 * in the mapping table even if it's not in the hash 1922 * table. We cannot depend on the mapping table entry 1923 * being cleared because the node may not be free'd. 1924 */ 1925 (void)node_clear_keyixmap(nt, ni); 1926 if (!ieee80211_node_dectestref(ni)) { 1927 /* 1928 * Other references are present, just remove the 1929 * node from the table so it cannot be found. When 1930 * the references are dropped storage will be 1931 * reclaimed. 1932 */ 1933 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1934 LIST_REMOVE(ni, ni_hash); 1935 ni->ni_table = NULL; /* clear reference */ 1936 } else 1937 _ieee80211_free_node(ni); 1938 } 1939 1940 /* 1941 * Node table support. 1942 */ 1943 1944 static void 1945 ieee80211_node_table_init(struct ieee80211com *ic, 1946 struct ieee80211_node_table *nt, 1947 const char *name, int inact, int keyixmax) 1948 { 1949 1950 nt->nt_ic = ic; 1951 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 1952 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ic->ic_name); 1953 TAILQ_INIT(&nt->nt_node); 1954 nt->nt_name = name; 1955 nt->nt_scangen = 1; 1956 nt->nt_inact_init = inact; 1957 nt->nt_keyixmax = keyixmax; 1958 if (nt->nt_keyixmax > 0) { 1959 #if defined(__DragonFly__) 1960 nt->nt_keyixmap = (struct ieee80211_node **) kmalloc( 1961 keyixmax * sizeof(struct ieee80211_node *), 1962 M_80211_NODE, M_INTWAIT | M_ZERO); 1963 #else 1964 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 1965 keyixmax * sizeof(struct ieee80211_node *), 1966 M_80211_NODE, 1967 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1968 #endif 1969 if (nt->nt_keyixmap == NULL) 1970 ic_printf(ic, 1971 "Cannot allocate key index map with %u entries\n", 1972 keyixmax); 1973 } else 1974 nt->nt_keyixmap = NULL; 1975 } 1976 1977 static void 1978 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1979 struct ieee80211vap *match) 1980 { 1981 struct ieee80211_node *ni, *next; 1982 1983 IEEE80211_NODE_LOCK(nt); 1984 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1985 if (match != NULL && ni->ni_vap != match) 1986 continue; 1987 /* XXX can this happen? if so need's work */ 1988 if (ni->ni_associd != 0) { 1989 struct ieee80211vap *vap = ni->ni_vap; 1990 1991 if (vap->iv_auth->ia_node_leave != NULL) 1992 vap->iv_auth->ia_node_leave(ni); 1993 if (vap->iv_aid_bitmap != NULL) 1994 IEEE80211_AID_CLR(vap, ni->ni_associd); 1995 } 1996 ni->ni_wdsvap = NULL; /* clear reference */ 1997 node_reclaim(nt, ni); 1998 } 1999 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 2000 /* 2001 * Make a separate pass to clear references to this vap 2002 * held by DWDS entries. They will not be matched above 2003 * because ni_vap will point to the ap vap but we still 2004 * need to clear ni_wdsvap when the WDS vap is destroyed 2005 * and/or reset. 2006 */ 2007 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 2008 if (ni->ni_wdsvap == match) 2009 ni->ni_wdsvap = NULL; 2010 } 2011 IEEE80211_NODE_UNLOCK(nt); 2012 } 2013 2014 static void 2015 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2016 { 2017 ieee80211_node_table_reset(nt, NULL); 2018 if (nt->nt_keyixmap != NULL) { 2019 #ifdef DIAGNOSTIC 2020 /* XXX verify all entries are NULL */ 2021 int i; 2022 for (i = 0; i < nt->nt_keyixmax; i++) 2023 if (nt->nt_keyixmap[i] != NULL) 2024 kprintf("%s: %s[%u] still active\n", __func__, 2025 nt->nt_name, i); 2026 #endif 2027 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 2028 nt->nt_keyixmap = NULL; 2029 } 2030 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 2031 IEEE80211_NODE_LOCK_DESTROY(nt); 2032 } 2033 2034 /* 2035 * Timeout inactive stations and do related housekeeping. 2036 * Note that we cannot hold the node lock while sending a 2037 * frame as this would lead to a LOR. Instead we use a 2038 * generation number to mark nodes that we've scanned and 2039 * drop the lock and restart a scan if we have to time out 2040 * a node. Since we are single-threaded by virtue of 2041 * controlling the inactivity timer we can be sure this will 2042 * process each node only once. 2043 */ 2044 static void 2045 ieee80211_timeout_stations(struct ieee80211com *ic) 2046 { 2047 struct ieee80211_node_table *nt = &ic->ic_sta; 2048 struct ieee80211vap *vap; 2049 struct ieee80211_node *ni; 2050 int gen = 0; 2051 2052 IEEE80211_NODE_ITERATE_LOCK(nt); 2053 gen = ++nt->nt_scangen; 2054 restart: 2055 IEEE80211_NODE_LOCK(nt); 2056 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2057 if (ni->ni_scangen == gen) /* previously handled */ 2058 continue; 2059 ni->ni_scangen = gen; 2060 /* 2061 * Ignore entries for which have yet to receive an 2062 * authentication frame. These are transient and 2063 * will be reclaimed when the last reference to them 2064 * goes away (when frame xmits complete). 2065 */ 2066 vap = ni->ni_vap; 2067 /* 2068 * Only process stations when in RUN state. This 2069 * insures, for example, that we don't timeout an 2070 * inactive station during CAC. Note that CSA state 2071 * is actually handled in ieee80211_node_timeout as 2072 * it applies to more than timeout processing. 2073 */ 2074 if (vap->iv_state != IEEE80211_S_RUN) 2075 continue; 2076 /* XXX can vap be NULL? */ 2077 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2078 vap->iv_opmode == IEEE80211_M_STA) && 2079 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2080 continue; 2081 /* 2082 * Free fragment if not needed anymore 2083 * (last fragment older than 1s). 2084 * XXX doesn't belong here, move to node_age 2085 */ 2086 if (ni->ni_rxfrag[0] != NULL && 2087 ticks > ni->ni_rxfragstamp + hz) { 2088 m_freem(ni->ni_rxfrag[0]); 2089 ni->ni_rxfrag[0] = NULL; 2090 } 2091 if (ni->ni_inact > 0) { 2092 ni->ni_inact--; 2093 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2094 "%s: inact %u inact_reload %u nrates %u", 2095 __func__, ni->ni_inact, ni->ni_inact_reload, 2096 ni->ni_rates.rs_nrates); 2097 } 2098 /* 2099 * Special case ourself; we may be idle for extended periods 2100 * of time and regardless reclaiming our state is wrong. 2101 * XXX run ic_node_age 2102 */ 2103 if (ni == vap->iv_bss) 2104 continue; 2105 if (ni->ni_associd != 0 || 2106 (vap->iv_opmode == IEEE80211_M_IBSS || 2107 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2108 /* 2109 * Age/drain resources held by the station. 2110 */ 2111 ic->ic_node_age(ni); 2112 /* 2113 * Probe the station before time it out. We 2114 * send a null data frame which may not be 2115 * universally supported by drivers (need it 2116 * for ps-poll support so it should be...). 2117 * 2118 * XXX don't probe the station unless we've 2119 * received a frame from them (and have 2120 * some idea of the rates they are capable 2121 * of); this will get fixed more properly 2122 * soon with better handling of the rate set. 2123 */ 2124 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2125 (0 < ni->ni_inact && 2126 ni->ni_inact <= vap->iv_inact_probe) && 2127 ni->ni_rates.rs_nrates != 0) { 2128 IEEE80211_NOTE(vap, 2129 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2130 ni, "%s", 2131 "probe station due to inactivity"); 2132 /* 2133 * Grab a reference before unlocking the table 2134 * so the node cannot be reclaimed before we 2135 * send the frame. ieee80211_send_nulldata 2136 * understands we've done this and reclaims the 2137 * ref for us as needed. 2138 */ 2139 ieee80211_ref_node(ni); 2140 IEEE80211_NODE_UNLOCK(nt); 2141 ieee80211_send_nulldata(ni); 2142 /* XXX stat? */ 2143 goto restart; 2144 } 2145 } 2146 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2147 ni->ni_inact <= 0) { 2148 IEEE80211_NOTE(vap, 2149 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2150 "station timed out due to inactivity " 2151 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2152 /* 2153 * Send a deauthenticate frame and drop the station. 2154 * This is somewhat complicated due to reference counts 2155 * and locking. At this point a station will typically 2156 * have a reference count of 1. ieee80211_node_leave 2157 * will do a "free" of the node which will drop the 2158 * reference count. But in the meantime a reference 2159 * wil be held by the deauth frame. The actual reclaim 2160 * of the node will happen either after the tx is 2161 * completed or by ieee80211_node_leave. 2162 * 2163 * Separately we must drop the node lock before sending 2164 * in case the driver takes a lock, as this can result 2165 * in a LOR between the node lock and the driver lock. 2166 */ 2167 ieee80211_ref_node(ni); 2168 IEEE80211_NODE_UNLOCK(nt); 2169 if (ni->ni_associd != 0) { 2170 IEEE80211_SEND_MGMT(ni, 2171 IEEE80211_FC0_SUBTYPE_DEAUTH, 2172 IEEE80211_REASON_AUTH_EXPIRE); 2173 } 2174 ieee80211_node_leave(ni); 2175 ieee80211_free_node(ni); 2176 vap->iv_stats.is_node_timeout++; 2177 goto restart; 2178 } 2179 } 2180 IEEE80211_NODE_UNLOCK(nt); 2181 2182 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2183 } 2184 2185 /* 2186 * Aggressively reclaim resources. This should be used 2187 * only in a critical situation to reclaim mbuf resources. 2188 */ 2189 void 2190 ieee80211_drain(struct ieee80211com *ic) 2191 { 2192 struct ieee80211_node_table *nt = &ic->ic_sta; 2193 struct ieee80211vap *vap; 2194 struct ieee80211_node *ni; 2195 2196 IEEE80211_NODE_LOCK(nt); 2197 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2198 /* 2199 * Ignore entries for which have yet to receive an 2200 * authentication frame. These are transient and 2201 * will be reclaimed when the last reference to them 2202 * goes away (when frame xmits complete). 2203 */ 2204 vap = ni->ni_vap; 2205 /* 2206 * Only process stations when in RUN state. This 2207 * insures, for example, that we don't timeout an 2208 * inactive station during CAC. Note that CSA state 2209 * is actually handled in ieee80211_node_timeout as 2210 * it applies to more than timeout processing. 2211 */ 2212 if (vap->iv_state != IEEE80211_S_RUN) 2213 continue; 2214 /* XXX can vap be NULL? */ 2215 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2216 vap->iv_opmode == IEEE80211_M_STA) && 2217 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2218 continue; 2219 /* 2220 * Free fragments. 2221 * XXX doesn't belong here, move to node_drain 2222 */ 2223 if (ni->ni_rxfrag[0] != NULL) { 2224 m_freem(ni->ni_rxfrag[0]); 2225 ni->ni_rxfrag[0] = NULL; 2226 } 2227 /* 2228 * Drain resources held by the station. 2229 */ 2230 ic->ic_node_drain(ni); 2231 } 2232 IEEE80211_NODE_UNLOCK(nt); 2233 } 2234 2235 /* 2236 * Per-ieee80211com inactivity timer callback. 2237 */ 2238 void 2239 ieee80211_node_timeout(void *arg) 2240 { 2241 struct ieee80211com *ic = arg; 2242 2243 /* 2244 * Defer timeout processing if a channel switch is pending. 2245 * We typically need to be mute so not doing things that 2246 * might generate frames is good to handle in one place. 2247 * Suppressing the station timeout processing may extend the 2248 * lifetime of inactive stations (by not decrementing their 2249 * idle counters) but this should be ok unless the CSA is 2250 * active for an unusually long time. 2251 */ 2252 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2253 ieee80211_scan_timeout(ic); 2254 ieee80211_timeout_stations(ic); 2255 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2256 2257 IEEE80211_LOCK(ic); 2258 ieee80211_erp_timeout(ic); 2259 ieee80211_ht_timeout(ic); 2260 IEEE80211_UNLOCK(ic); 2261 } 2262 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2263 ieee80211_node_timeout, ic); 2264 } 2265 2266 /* 2267 * Iterate over the node table and return an array of ref'ed nodes. 2268 * 2269 * This is separated out from calling the actual node function so that 2270 * no LORs will occur. 2271 * 2272 * If there are too many nodes (ie, the number of nodes doesn't fit 2273 * within 'max_aid' entries) then the node references will be freed 2274 * and an error will be returned. 2275 * 2276 * The responsibility of allocating and freeing "ni_arr" is up to 2277 * the caller. 2278 */ 2279 int 2280 ieee80211_iterate_nt(struct ieee80211_node_table *nt, 2281 struct ieee80211_node **ni_arr, uint16_t max_aid) 2282 { 2283 u_int gen; 2284 int i, j, ret; 2285 struct ieee80211_node *ni; 2286 2287 IEEE80211_NODE_ITERATE_LOCK(nt); 2288 IEEE80211_NODE_LOCK(nt); 2289 2290 gen = ++nt->nt_scangen; 2291 i = ret = 0; 2292 2293 /* 2294 * We simply assume here that since the node 2295 * scan generation doesn't change (as 2296 * we are holding both the node table and 2297 * node table iteration locks), we can simply 2298 * assign it to the node here. 2299 */ 2300 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2301 if (i >= max_aid) { 2302 ret = E2BIG; 2303 ic_printf(nt->nt_ic, "Node array overflow: max=%u", 2304 max_aid); 2305 break; 2306 } 2307 ni_arr[i] = ieee80211_ref_node(ni); 2308 ni_arr[i]->ni_scangen = gen; 2309 i++; 2310 } 2311 2312 /* 2313 * It's safe to unlock here. 2314 * 2315 * If we're successful, the list is returned. 2316 * If we're unsuccessful, the list is ignored 2317 * and we remove our references. 2318 * 2319 * This avoids any potential LOR with 2320 * ieee80211_free_node(). 2321 */ 2322 IEEE80211_NODE_UNLOCK(nt); 2323 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2324 2325 /* 2326 * If ret is non-zero, we hit some kind of error. 2327 * Rather than walking some nodes, we'll walk none 2328 * of them. 2329 */ 2330 if (ret) { 2331 for (j = 0; j < i; j++) { 2332 /* ieee80211_free_node() locks by itself */ 2333 ieee80211_free_node(ni_arr[j]); 2334 } 2335 } 2336 2337 return (ret); 2338 } 2339 2340 /* 2341 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2342 * reference in the source. 2343 * 2344 * Note that this fetches 'max_aid' from the first VAP, rather than finding 2345 * the largest max_aid from all VAPs. 2346 */ 2347 void 2348 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2349 ieee80211_iter_func *f, void *arg) 2350 { 2351 struct ieee80211_node **ni_arr; 2352 size_t size; 2353 int i; 2354 uint16_t max_aid; 2355 struct ieee80211vap *vap; 2356 2357 /* Overdoing it default */ 2358 max_aid = IEEE80211_AID_MAX; 2359 2360 /* Handle the case of there being no vaps just yet */ 2361 vap = TAILQ_FIRST(&nt->nt_ic->ic_vaps); 2362 if (vap != NULL) 2363 max_aid = vap->iv_max_aid; 2364 2365 size = max_aid * sizeof(struct ieee80211_node *); 2366 #if defined(__DragonFly__) 2367 ni_arr = (struct ieee80211_node **) kmalloc(size, M_80211_NODE, 2368 M_INTWAIT | M_ZERO); 2369 #else 2370 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2371 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2372 #endif 2373 if (ni_arr == NULL) 2374 return; 2375 2376 /* 2377 * If this fails, the node table won't have any 2378 * valid entries - ieee80211_iterate_nt() frees 2379 * the references to them. So don't try walking 2380 * the table; just skip to the end and free the 2381 * temporary memory. 2382 */ 2383 if (ieee80211_iterate_nt(nt, ni_arr, max_aid) != 0) 2384 goto done; 2385 2386 for (i = 0; i < max_aid; i++) { 2387 if (ni_arr[i] == NULL) /* end of the list */ 2388 break; 2389 (*f)(arg, ni_arr[i]); 2390 /* ieee80211_free_node() locks by itself */ 2391 ieee80211_free_node(ni_arr[i]); 2392 } 2393 2394 done: 2395 IEEE80211_FREE(ni_arr, M_80211_NODE); 2396 } 2397 2398 void 2399 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2400 { 2401 kprintf("0x%p: mac %s refcnt %d\n", ni, 2402 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2403 kprintf("\tscangen %u authmode %u flags 0x%x\n", 2404 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2405 kprintf("\tassocid 0x%x txpower %u vlan %u\n", 2406 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2407 kprintf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2408 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2409 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2410 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2411 ni->ni_rxfragstamp); 2412 kprintf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2413 node_getrssi(ni), ni->ni_noise, 2414 ni->ni_intval, ni->ni_capinfo); 2415 kprintf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2416 ether_sprintf(ni->ni_bssid), 2417 ni->ni_esslen, ni->ni_essid, 2418 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2419 kprintf("\tinact %u inact_reload %u txrate %u\n", 2420 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2421 kprintf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2422 ni->ni_htcap, ni->ni_htparam, 2423 ni->ni_htctlchan, ni->ni_ht2ndchan); 2424 kprintf("\thtopmode %x htstbc %x chw %u\n", 2425 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2426 } 2427 2428 void 2429 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2430 { 2431 ieee80211_iterate_nodes(nt, 2432 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2433 } 2434 2435 static void 2436 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2437 { 2438 struct ieee80211vap *vap; 2439 2440 IEEE80211_LOCK_ASSERT(ic); 2441 2442 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2443 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2444 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2445 } 2446 2447 void 2448 ieee80211_notify_erp(struct ieee80211com *ic) 2449 { 2450 IEEE80211_LOCK(ic); 2451 ieee80211_notify_erp_locked(ic); 2452 IEEE80211_UNLOCK(ic); 2453 } 2454 2455 /* 2456 * Handle a station joining an 11g network. 2457 */ 2458 static void 2459 ieee80211_node_join_11g(struct ieee80211_node *ni) 2460 { 2461 struct ieee80211com *ic = ni->ni_ic; 2462 2463 IEEE80211_LOCK_ASSERT(ic); 2464 2465 /* 2466 * Station isn't capable of short slot time. Bump 2467 * the count of long slot time stations and disable 2468 * use of short slot time. Note that the actual switch 2469 * over to long slot time use may not occur until the 2470 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2471 */ 2472 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2473 ic->ic_longslotsta++; 2474 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2475 "station needs long slot time, count %d", 2476 ic->ic_longslotsta); 2477 /* XXX vap's w/ conflicting needs won't work */ 2478 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2479 /* 2480 * Don't force slot time when switched to turbo 2481 * mode as non-ERP stations won't be present; this 2482 * need only be done when on the normal G channel. 2483 */ 2484 ieee80211_set_shortslottime(ic, 0); 2485 } 2486 } 2487 /* 2488 * If the new station is not an ERP station 2489 * then bump the counter and enable protection 2490 * if configured. 2491 */ 2492 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2493 ic->ic_nonerpsta++; 2494 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2495 "station is !ERP, %d non-ERP stations associated", 2496 ic->ic_nonerpsta); 2497 /* 2498 * If station does not support short preamble 2499 * then we must enable use of Barker preamble. 2500 */ 2501 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2502 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2503 "%s", "station needs long preamble"); 2504 ic->ic_flags |= IEEE80211_F_USEBARKER; 2505 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2506 } 2507 /* 2508 * If protection is configured and this is the first 2509 * indication we should use protection, enable it. 2510 */ 2511 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2512 ic->ic_nonerpsta == 1 && 2513 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2514 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2515 "%s: enable use of protection\n", __func__); 2516 ic->ic_flags |= IEEE80211_F_USEPROT; 2517 ieee80211_notify_erp_locked(ic); 2518 } 2519 } else 2520 ni->ni_flags |= IEEE80211_NODE_ERP; 2521 } 2522 2523 void 2524 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2525 { 2526 struct ieee80211com *ic = ni->ni_ic; 2527 struct ieee80211vap *vap = ni->ni_vap; 2528 int newassoc; 2529 2530 if (ni->ni_associd == 0) { 2531 uint16_t aid; 2532 2533 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2534 /* 2535 * It would be good to search the bitmap 2536 * more efficiently, but this will do for now. 2537 */ 2538 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2539 if (!IEEE80211_AID_ISSET(vap, aid)) 2540 break; 2541 } 2542 if (aid >= vap->iv_max_aid) { 2543 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2544 ieee80211_node_leave(ni); 2545 return; 2546 } 2547 ni->ni_associd = aid | 0xc000; 2548 ni->ni_jointime = time_uptime; 2549 IEEE80211_LOCK(ic); 2550 IEEE80211_AID_SET(vap, ni->ni_associd); 2551 vap->iv_sta_assoc++; 2552 ic->ic_sta_assoc++; 2553 2554 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2555 ieee80211_ht_node_join(ni); 2556 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2557 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2558 ieee80211_node_join_11g(ni); 2559 IEEE80211_UNLOCK(ic); 2560 2561 newassoc = 1; 2562 } else 2563 newassoc = 0; 2564 2565 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2566 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2567 IEEE80211_NODE_AID(ni), 2568 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2569 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2570 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2571 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2572 ni->ni_flags & IEEE80211_NODE_HT ? 2573 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2574 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2575 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2576 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2577 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2578 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2579 ", fast-frames" : "", 2580 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2581 ", turbo" : "" 2582 ); 2583 2584 ieee80211_node_setuptxparms(ni); 2585 ieee80211_ratectl_node_init(ni); 2586 /* give driver a chance to setup state like ni_txrate */ 2587 if (ic->ic_newassoc != NULL) 2588 ic->ic_newassoc(ni, newassoc); 2589 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2590 /* tell the authenticator about new station */ 2591 if (vap->iv_auth->ia_node_join != NULL) 2592 vap->iv_auth->ia_node_join(ni); 2593 ieee80211_notify_node_join(ni, 2594 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2595 } 2596 2597 static void 2598 disable_protection(struct ieee80211com *ic) 2599 { 2600 KASSERT(ic->ic_nonerpsta == 0 && 2601 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2602 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2603 ic->ic_flags_ext)); 2604 2605 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2606 /* XXX verify mode? */ 2607 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2608 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2609 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2610 } 2611 ieee80211_notify_erp_locked(ic); 2612 } 2613 2614 /* 2615 * Handle a station leaving an 11g network. 2616 */ 2617 static void 2618 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2619 { 2620 struct ieee80211com *ic = ni->ni_ic; 2621 2622 IEEE80211_LOCK_ASSERT(ic); 2623 2624 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2625 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2626 ic->ic_bsschan->ic_flags)); 2627 2628 /* 2629 * If a long slot station do the slot time bookkeeping. 2630 */ 2631 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2632 KASSERT(ic->ic_longslotsta > 0, 2633 ("bogus long slot station count %d", ic->ic_longslotsta)); 2634 ic->ic_longslotsta--; 2635 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2636 "long slot time station leaves, count now %d", 2637 ic->ic_longslotsta); 2638 if (ic->ic_longslotsta == 0) { 2639 /* 2640 * Re-enable use of short slot time if supported 2641 * and not operating in IBSS mode (per spec). 2642 */ 2643 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2644 ic->ic_opmode != IEEE80211_M_IBSS) { 2645 IEEE80211_DPRINTF(ni->ni_vap, 2646 IEEE80211_MSG_ASSOC, 2647 "%s: re-enable use of short slot time\n", 2648 __func__); 2649 ieee80211_set_shortslottime(ic, 1); 2650 } 2651 } 2652 } 2653 /* 2654 * If a non-ERP station do the protection-related bookkeeping. 2655 */ 2656 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2657 KASSERT(ic->ic_nonerpsta > 0, 2658 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2659 ic->ic_nonerpsta--; 2660 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2661 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2662 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2663 " (non-ERP sta present)" : ""); 2664 if (ic->ic_nonerpsta == 0 && 2665 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2666 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2667 "%s: disable use of protection\n", __func__); 2668 disable_protection(ic); 2669 } 2670 } 2671 } 2672 2673 /* 2674 * Time out presence of an overlapping bss with non-ERP 2675 * stations. When operating in hostap mode we listen for 2676 * beacons from other stations and if we identify a non-ERP 2677 * station is present we enable protection. To identify 2678 * when all non-ERP stations are gone we time out this 2679 * condition. 2680 */ 2681 static void 2682 ieee80211_erp_timeout(struct ieee80211com *ic) 2683 { 2684 2685 IEEE80211_LOCK_ASSERT(ic); 2686 2687 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2688 ieee80211_time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2689 #if 0 2690 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2691 "%s", "age out non-ERP sta present on channel"); 2692 #endif 2693 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2694 if (ic->ic_nonerpsta == 0) 2695 disable_protection(ic); 2696 } 2697 } 2698 2699 /* 2700 * Handle bookkeeping for station deauthentication/disassociation 2701 * when operating as an ap. 2702 */ 2703 void 2704 ieee80211_node_leave(struct ieee80211_node *ni) 2705 { 2706 struct ieee80211com *ic = ni->ni_ic; 2707 struct ieee80211vap *vap = ni->ni_vap; 2708 struct ieee80211_node_table *nt = ni->ni_table; 2709 2710 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2711 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2712 2713 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2714 ("unexpected operating mode %u", vap->iv_opmode)); 2715 /* 2716 * If node wasn't previously associated all 2717 * we need to do is reclaim the reference. 2718 */ 2719 /* XXX ibss mode bypasses 11g and notification */ 2720 if (ni->ni_associd == 0) 2721 goto done; 2722 /* 2723 * Tell the authenticator the station is leaving. 2724 * Note that we must do this before yanking the 2725 * association id as the authenticator uses the 2726 * associd to locate it's state block. 2727 */ 2728 if (vap->iv_auth->ia_node_leave != NULL) 2729 vap->iv_auth->ia_node_leave(ni); 2730 2731 IEEE80211_LOCK(ic); 2732 IEEE80211_AID_CLR(vap, ni->ni_associd); 2733 vap->iv_sta_assoc--; 2734 ic->ic_sta_assoc--; 2735 2736 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2737 ieee80211_ht_node_leave(ni); 2738 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2739 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2740 ieee80211_node_leave_11g(ni); 2741 IEEE80211_UNLOCK(ic); 2742 /* 2743 * Cleanup station state. In particular clear various 2744 * state that might otherwise be reused if the node 2745 * is reused before the reference count goes to zero 2746 * (and memory is reclaimed). 2747 */ 2748 ieee80211_sta_leave(ni); 2749 done: 2750 /* 2751 * Remove the node from any table it's recorded in and 2752 * drop the caller's reference. Removal from the table 2753 * is important to insure the node is not reprocessed 2754 * for inactivity. 2755 */ 2756 if (nt != NULL) { 2757 IEEE80211_NODE_LOCK(nt); 2758 node_reclaim(nt, ni); 2759 IEEE80211_NODE_UNLOCK(nt); 2760 } else 2761 ieee80211_free_node(ni); 2762 } 2763 2764 struct rssiinfo { 2765 struct ieee80211vap *vap; 2766 int rssi_samples; 2767 uint32_t rssi_total; 2768 }; 2769 2770 static void 2771 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2772 { 2773 struct rssiinfo *info = arg; 2774 struct ieee80211vap *vap = ni->ni_vap; 2775 int8_t rssi; 2776 2777 if (info->vap != vap) 2778 return; 2779 /* only associated stations */ 2780 if (ni->ni_associd == 0) 2781 return; 2782 rssi = vap->iv_ic->ic_node_getrssi(ni); 2783 if (rssi != 0) { 2784 info->rssi_samples++; 2785 info->rssi_total += rssi; 2786 } 2787 } 2788 2789 static void 2790 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2791 { 2792 struct rssiinfo *info = arg; 2793 struct ieee80211vap *vap = ni->ni_vap; 2794 int8_t rssi; 2795 2796 if (info->vap != vap) 2797 return; 2798 /* only neighbors */ 2799 /* XXX check bssid */ 2800 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2801 return; 2802 rssi = vap->iv_ic->ic_node_getrssi(ni); 2803 if (rssi != 0) { 2804 info->rssi_samples++; 2805 info->rssi_total += rssi; 2806 } 2807 } 2808 2809 #ifdef IEEE80211_SUPPORT_MESH 2810 static void 2811 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2812 { 2813 struct rssiinfo *info = arg; 2814 struct ieee80211vap *vap = ni->ni_vap; 2815 int8_t rssi; 2816 2817 if (info->vap != vap) 2818 return; 2819 /* only neighbors that peered successfully */ 2820 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 2821 return; 2822 rssi = vap->iv_ic->ic_node_getrssi(ni); 2823 if (rssi != 0) { 2824 info->rssi_samples++; 2825 info->rssi_total += rssi; 2826 } 2827 } 2828 #endif /* IEEE80211_SUPPORT_MESH */ 2829 2830 int8_t 2831 ieee80211_getrssi(struct ieee80211vap *vap) 2832 { 2833 #define NZ(x) ((x) == 0 ? 1 : (x)) 2834 struct ieee80211com *ic = vap->iv_ic; 2835 struct rssiinfo info; 2836 2837 info.rssi_total = 0; 2838 info.rssi_samples = 0; 2839 info.vap = vap; 2840 switch (vap->iv_opmode) { 2841 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2842 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2843 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2844 break; 2845 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2846 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2847 break; 2848 #ifdef IEEE80211_SUPPORT_MESH 2849 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 2850 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info); 2851 break; 2852 #endif 2853 case IEEE80211_M_MONITOR: /* XXX */ 2854 case IEEE80211_M_STA: /* use stats from associated ap */ 2855 default: 2856 if (vap->iv_bss != NULL) 2857 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2858 info.rssi_samples = 1; 2859 break; 2860 } 2861 return info.rssi_total / NZ(info.rssi_samples); 2862 #undef NZ 2863 } 2864 2865 void 2866 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2867 { 2868 2869 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2870 return; 2871 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2872 /* for non-station mode return avg'd rssi accounting */ 2873 if (vap->iv_opmode != IEEE80211_M_STA) 2874 *rssi = ieee80211_getrssi(vap); 2875 } 2876