ieee80211_node.c revision 282404
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: head/sys/net80211/ieee80211_node.c 282404 2015-05-04 00:29:19Z adrian $"); 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 57#include <net/bpf.h> 58 59/* 60 * IEEE80211_NODE_HASHSIZE must be a power of 2. 61 */ 62CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 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 82static int ieee80211_sta_join1(struct ieee80211_node *); 83 84static struct ieee80211_node *node_alloc(struct ieee80211vap *, 85 const uint8_t [IEEE80211_ADDR_LEN]); 86static void node_cleanup(struct ieee80211_node *); 87static void node_free(struct ieee80211_node *); 88static void node_age(struct ieee80211_node *); 89static int8_t node_getrssi(const struct ieee80211_node *); 90static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 91static void node_getmimoinfo(const struct ieee80211_node *, 92 struct ieee80211_mimo_info *); 93 94static void _ieee80211_free_node(struct ieee80211_node *); 95 96static void node_reclaim(struct ieee80211_node_table *nt, 97 struct ieee80211_node *ni); 98static void ieee80211_node_table_init(struct ieee80211com *ic, 99 struct ieee80211_node_table *nt, const char *name, 100 int inact, int keymaxix); 101static void ieee80211_node_table_reset(struct ieee80211_node_table *, 102 struct ieee80211vap *); 103static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 104static void ieee80211_erp_timeout(struct ieee80211com *); 105 106MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 107MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 108 109void 110ieee80211_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 callout_init(&ic->ic_inact, CALLOUT_MPSAFE); 118 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 119 ieee80211_node_timeout, ic); 120 121 ic->ic_node_alloc = node_alloc; 122 ic->ic_node_free = node_free; 123 ic->ic_node_cleanup = node_cleanup; 124 ic->ic_node_age = node_age; 125 ic->ic_node_drain = node_age; /* NB: same as age */ 126 ic->ic_node_getrssi = node_getrssi; 127 ic->ic_node_getsignal = node_getsignal; 128 ic->ic_node_getmimoinfo = node_getmimoinfo; 129 130 /* 131 * Set flags to be propagated to all vap's; 132 * these define default behaviour/configuration. 133 */ 134 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 135} 136 137void 138ieee80211_node_detach(struct ieee80211com *ic) 139{ 140 141 callout_drain(&ic->ic_inact); 142 ieee80211_node_table_cleanup(&ic->ic_sta); 143 ieee80211_ageq_cleanup(&ic->ic_stageq); 144} 145 146void 147ieee80211_node_vattach(struct ieee80211vap *vap) 148{ 149 /* NB: driver can override */ 150 vap->iv_max_aid = IEEE80211_AID_DEF; 151 152 /* default station inactivity timer setings */ 153 vap->iv_inact_init = IEEE80211_INACT_INIT; 154 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 155 vap->iv_inact_run = IEEE80211_INACT_RUN; 156 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 157 158 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 159 "%s: init %u auth %u run %u probe %u\n", __func__, 160 vap->iv_inact_init, vap->iv_inact_auth, 161 vap->iv_inact_run, vap->iv_inact_probe); 162} 163 164void 165ieee80211_node_latevattach(struct ieee80211vap *vap) 166{ 167 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 168 /* XXX should we allow max aid to be zero? */ 169 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 170 vap->iv_max_aid = IEEE80211_AID_MIN; 171 if_printf(vap->iv_ifp, 172 "WARNING: max aid too small, changed to %d\n", 173 vap->iv_max_aid); 174 } 175 vap->iv_aid_bitmap = (uint32_t *) malloc( 176 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 177 M_80211_NODE, M_NOWAIT | M_ZERO); 178 if (vap->iv_aid_bitmap == NULL) { 179 /* XXX no way to recover */ 180 printf("%s: no memory for AID bitmap, max aid %d!\n", 181 __func__, vap->iv_max_aid); 182 vap->iv_max_aid = 0; 183 } 184 } 185 186 ieee80211_reset_bss(vap); 187 188 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 189} 190 191void 192ieee80211_node_vdetach(struct ieee80211vap *vap) 193{ 194 struct ieee80211com *ic = vap->iv_ic; 195 196 ieee80211_node_table_reset(&ic->ic_sta, vap); 197 if (vap->iv_bss != NULL) { 198 ieee80211_free_node(vap->iv_bss); 199 vap->iv_bss = NULL; 200 } 201 if (vap->iv_aid_bitmap != NULL) { 202 free(vap->iv_aid_bitmap, M_80211_NODE); 203 vap->iv_aid_bitmap = NULL; 204 } 205} 206 207/* 208 * Port authorize/unauthorize interfaces for use by an authenticator. 209 */ 210 211void 212ieee80211_node_authorize(struct ieee80211_node *ni) 213{ 214 struct ieee80211vap *vap = ni->ni_vap; 215 216 ni->ni_flags |= IEEE80211_NODE_AUTH; 217 ni->ni_inact_reload = vap->iv_inact_run; 218 ni->ni_inact = ni->ni_inact_reload; 219 220 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 221 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 222} 223 224void 225ieee80211_node_unauthorize(struct ieee80211_node *ni) 226{ 227 struct ieee80211vap *vap = ni->ni_vap; 228 229 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 230 ni->ni_inact_reload = vap->iv_inact_auth; 231 if (ni->ni_inact > ni->ni_inact_reload) 232 ni->ni_inact = ni->ni_inact_reload; 233 234 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 235 "%s: inact_reload %u inact %u", __func__, 236 ni->ni_inact_reload, ni->ni_inact); 237} 238 239/* 240 * Fix tx parameters for a node according to ``association state''. 241 */ 242void 243ieee80211_node_setuptxparms(struct ieee80211_node *ni) 244{ 245 struct ieee80211vap *vap = ni->ni_vap; 246 enum ieee80211_phymode mode; 247 248 if (ni->ni_flags & IEEE80211_NODE_HT) { 249 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 250 mode = IEEE80211_MODE_11NA; 251 else 252 mode = IEEE80211_MODE_11NG; 253 } else { /* legacy rate handling */ 254 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 255 mode = IEEE80211_MODE_STURBO_A; 256 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 257 mode = IEEE80211_MODE_HALF; 258 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 259 mode = IEEE80211_MODE_QUARTER; 260 /* NB: 108A should be handled as 11a */ 261 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 262 mode = IEEE80211_MODE_11A; 263 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 264 (ni->ni_flags & IEEE80211_NODE_ERP)) 265 mode = IEEE80211_MODE_11G; 266 else 267 mode = IEEE80211_MODE_11B; 268 } 269 ni->ni_txparms = &vap->iv_txparms[mode]; 270} 271 272/* 273 * Set/change the channel. The rate set is also updated as 274 * to insure a consistent view by drivers. 275 * XXX should be private but hostap needs it to deal with CSA 276 */ 277void 278ieee80211_node_set_chan(struct ieee80211_node *ni, 279 struct ieee80211_channel *chan) 280{ 281 struct ieee80211com *ic = ni->ni_ic; 282 struct ieee80211vap *vap = ni->ni_vap; 283 enum ieee80211_phymode mode; 284 285 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 286 287 ni->ni_chan = chan; 288 mode = ieee80211_chan2mode(chan); 289 if (IEEE80211_IS_CHAN_HT(chan)) { 290 /* 291 * We must install the legacy rate est in ni_rates and the 292 * HT rate set in ni_htrates. 293 */ 294 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 295 /* 296 * Setup bss tx parameters based on operating mode. We 297 * use legacy rates when operating in a mixed HT+non-HT bss 298 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 299 */ 300 if (mode == IEEE80211_MODE_11NA && 301 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 302 mode = IEEE80211_MODE_11A; 303 else if (mode == IEEE80211_MODE_11NG && 304 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 305 mode = IEEE80211_MODE_11G; 306 if (mode == IEEE80211_MODE_11G && 307 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 308 mode = IEEE80211_MODE_11B; 309 } 310 ni->ni_txparms = &vap->iv_txparms[mode]; 311 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 312} 313 314static __inline void 315copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 316{ 317 /* propagate useful state */ 318 nbss->ni_authmode = obss->ni_authmode; 319 nbss->ni_txpower = obss->ni_txpower; 320 nbss->ni_vlan = obss->ni_vlan; 321 /* XXX statistics? */ 322 /* XXX legacy WDS bssid? */ 323} 324 325void 326ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 327{ 328 struct ieee80211com *ic = vap->iv_ic; 329 struct ieee80211_node *ni; 330 331 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 332 "%s: creating %s on channel %u\n", __func__, 333 ieee80211_opmode_name[vap->iv_opmode], 334 ieee80211_chan2ieee(ic, chan)); 335 336 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 337 if (ni == NULL) { 338 /* XXX recovery? */ 339 return; 340 } 341 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 342 ni->ni_esslen = vap->iv_des_ssid[0].len; 343 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 344 if (vap->iv_bss != NULL) 345 copy_bss(ni, vap->iv_bss); 346 ni->ni_intval = ic->ic_bintval; 347 if (vap->iv_flags & IEEE80211_F_PRIVACY) 348 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 349 if (ic->ic_phytype == IEEE80211_T_FH) { 350 ni->ni_fhdwell = 200; /* XXX */ 351 ni->ni_fhindex = 1; 352 } 353 if (vap->iv_opmode == IEEE80211_M_IBSS) { 354 vap->iv_flags |= IEEE80211_F_SIBSS; 355 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 356 if (vap->iv_flags & IEEE80211_F_DESBSSID) 357 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 358 else { 359 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 360 /* clear group bit, add local bit */ 361 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 362 } 363 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 364 if (vap->iv_flags & IEEE80211_F_DESBSSID) 365 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 366 else 367#ifdef IEEE80211_SUPPORT_TDMA 368 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 369#endif 370 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 371#ifdef IEEE80211_SUPPORT_MESH 372 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 373 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 374 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 375#endif 376 } 377 /* 378 * Fix the channel and related attributes. 379 */ 380 /* clear DFS CAC state on previous channel */ 381 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 382 ic->ic_bsschan->ic_freq != chan->ic_freq && 383 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 384 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 385 ic->ic_bsschan = chan; 386 ieee80211_node_set_chan(ni, chan); 387 ic->ic_curmode = ieee80211_chan2mode(chan); 388 /* 389 * Do mode-specific setup. 390 */ 391 if (IEEE80211_IS_CHAN_FULL(chan)) { 392 if (IEEE80211_IS_CHAN_ANYG(chan)) { 393 /* 394 * Use a mixed 11b/11g basic rate set. 395 */ 396 ieee80211_setbasicrates(&ni->ni_rates, 397 IEEE80211_MODE_11G); 398 if (vap->iv_flags & IEEE80211_F_PUREG) { 399 /* 400 * Also mark OFDM rates basic so 11b 401 * stations do not join (WiFi compliance). 402 */ 403 ieee80211_addbasicrates(&ni->ni_rates, 404 IEEE80211_MODE_11A); 405 } 406 } else if (IEEE80211_IS_CHAN_B(chan)) { 407 /* 408 * Force pure 11b rate set. 409 */ 410 ieee80211_setbasicrates(&ni->ni_rates, 411 IEEE80211_MODE_11B); 412 } 413 } 414 415 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 416} 417 418/* 419 * Reset bss state on transition to the INIT state. 420 * Clear any stations from the table (they have been 421 * deauth'd) and reset the bss node (clears key, rate 422 * etc. state). 423 */ 424void 425ieee80211_reset_bss(struct ieee80211vap *vap) 426{ 427 struct ieee80211com *ic = vap->iv_ic; 428 struct ieee80211_node *ni, *obss; 429 430 ieee80211_node_table_reset(&ic->ic_sta, vap); 431 /* XXX multi-bss: wrong */ 432 ieee80211_reset_erp(ic); 433 434 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 435 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 436 obss = vap->iv_bss; 437 vap->iv_bss = ieee80211_ref_node(ni); 438 if (obss != NULL) { 439 copy_bss(ni, obss); 440 ni->ni_intval = ic->ic_bintval; 441 ieee80211_free_node(obss); 442 } else 443 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 444} 445 446static int 447match_ssid(const struct ieee80211_node *ni, 448 int nssid, const struct ieee80211_scan_ssid ssids[]) 449{ 450 int i; 451 452 for (i = 0; i < nssid; i++) { 453 if (ni->ni_esslen == ssids[i].len && 454 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 455 return 1; 456 } 457 return 0; 458} 459 460/* 461 * Test a node for suitability/compatibility. 462 */ 463static int 464check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 465{ 466 struct ieee80211com *ic = ni->ni_ic; 467 uint8_t rate; 468 469 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 470 return 0; 471 if (vap->iv_opmode == IEEE80211_M_IBSS) { 472 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 473 return 0; 474 } else { 475 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 476 return 0; 477 } 478 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 479 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 480 return 0; 481 } else { 482 /* XXX does this mean privacy is supported or required? */ 483 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 484 return 0; 485 } 486 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 487 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 488 if (rate & IEEE80211_RATE_BASIC) 489 return 0; 490 if (vap->iv_des_nssid != 0 && 491 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 492 return 0; 493 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 494 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 495 return 0; 496 return 1; 497} 498 499#ifdef IEEE80211_DEBUG 500/* 501 * Display node suitability/compatibility. 502 */ 503static void 504check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 505{ 506 struct ieee80211com *ic = ni->ni_ic; 507 uint8_t rate; 508 int fail; 509 510 fail = 0; 511 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 512 fail |= 0x01; 513 if (vap->iv_opmode == IEEE80211_M_IBSS) { 514 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 515 fail |= 0x02; 516 } else { 517 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 518 fail |= 0x02; 519 } 520 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 521 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 522 fail |= 0x04; 523 } else { 524 /* XXX does this mean privacy is supported or required? */ 525 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 526 fail |= 0x04; 527 } 528 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 529 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 530 if (rate & IEEE80211_RATE_BASIC) 531 fail |= 0x08; 532 if (vap->iv_des_nssid != 0 && 533 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 534 fail |= 0x10; 535 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 536 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 537 fail |= 0x20; 538 539 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 540 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 541 printf(" %3d%c", 542 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 543 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 544 fail & 0x08 ? '!' : ' '); 545 printf(" %4s%c", 546 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 547 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 548 "????", 549 fail & 0x02 ? '!' : ' '); 550 printf(" %3s%c ", 551 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 552 fail & 0x04 ? '!' : ' '); 553 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 554 printf("%s\n", fail & 0x10 ? "!" : ""); 555} 556#endif /* IEEE80211_DEBUG */ 557 558/* 559 * Handle 802.11 ad hoc network merge. The 560 * convention, set by the Wireless Ethernet Compatibility Alliance 561 * (WECA), is that an 802.11 station will change its BSSID to match 562 * the "oldest" 802.11 ad hoc network, on the same channel, that 563 * has the station's desired SSID. The "oldest" 802.11 network 564 * sends beacons with the greatest TSF timestamp. 565 * 566 * The caller is assumed to validate TSF's before attempting a merge. 567 * 568 * Return !0 if the BSSID changed, 0 otherwise. 569 */ 570int 571ieee80211_ibss_merge(struct ieee80211_node *ni) 572{ 573 struct ieee80211vap *vap = ni->ni_vap; 574#ifdef IEEE80211_DEBUG 575 struct ieee80211com *ic = ni->ni_ic; 576#endif 577 578 if (ni == vap->iv_bss || 579 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 580 /* unchanged, nothing to do */ 581 return 0; 582 } 583 if (!check_bss(vap, ni)) { 584 /* capabilities mismatch */ 585 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 586 "%s: merge failed, capabilities mismatch\n", __func__); 587#ifdef IEEE80211_DEBUG 588 if (ieee80211_msg_assoc(vap)) 589 check_bss_debug(vap, ni); 590#endif 591 vap->iv_stats.is_ibss_capmismatch++; 592 return 0; 593 } 594 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 595 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 596 ether_sprintf(ni->ni_bssid), 597 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 598 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 599 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 600 ); 601 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 602} 603 604/* 605 * Calculate HT channel promotion flags for all vaps. 606 * This assumes ni_chan have been setup for each vap. 607 */ 608static int 609gethtadjustflags(struct ieee80211com *ic) 610{ 611 struct ieee80211vap *vap; 612 int flags; 613 614 flags = 0; 615 /* XXX locking */ 616 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 617 if (vap->iv_state < IEEE80211_S_RUN) 618 continue; 619 switch (vap->iv_opmode) { 620 case IEEE80211_M_WDS: 621 case IEEE80211_M_STA: 622 case IEEE80211_M_AHDEMO: 623 case IEEE80211_M_HOSTAP: 624 case IEEE80211_M_IBSS: 625 case IEEE80211_M_MBSS: 626 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 627 break; 628 default: 629 break; 630 } 631 } 632 return flags; 633} 634 635/* 636 * Check if the current channel needs to change based on whether 637 * any vap's are using HT20/HT40. This is used to sync the state 638 * of ic_curchan after a channel width change on a running vap. 639 */ 640void 641ieee80211_sync_curchan(struct ieee80211com *ic) 642{ 643 struct ieee80211_channel *c; 644 645 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 646 if (c != ic->ic_curchan) { 647 ic->ic_curchan = c; 648 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 649 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 650 IEEE80211_UNLOCK(ic); 651 ic->ic_set_channel(ic); 652 ieee80211_radiotap_chan_change(ic); 653 IEEE80211_LOCK(ic); 654 } 655} 656 657/* 658 * Setup the current channel. The request channel may be 659 * promoted if other vap's are operating with HT20/HT40. 660 */ 661void 662ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 663{ 664 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 665 int flags = gethtadjustflags(ic); 666 /* 667 * Check for channel promotion required to support the 668 * set of running vap's. This assumes we are called 669 * after ni_chan is setup for each vap. 670 */ 671 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 672 if (flags > ieee80211_htchanflags(c)) 673 c = ieee80211_ht_adjust_channel(ic, c, flags); 674 } 675 ic->ic_bsschan = ic->ic_curchan = c; 676 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 677 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 678} 679 680/* 681 * Change the current channel. The channel change is guaranteed to have 682 * happened before the next state change. 683 */ 684void 685ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 686{ 687 ieee80211_setupcurchan(ic, c); 688 ieee80211_runtask(ic, &ic->ic_chan_task); 689} 690 691void 692ieee80211_update_chw(struct ieee80211com *ic) 693{ 694 695 ieee80211_setupcurchan(ic, ic->ic_curchan); 696 ieee80211_runtask(ic, &ic->ic_chw_task); 697} 698 699/* 700 * Join the specified IBSS/BSS network. The node is assumed to 701 * be passed in with a held reference. 702 */ 703static int 704ieee80211_sta_join1(struct ieee80211_node *selbs) 705{ 706 struct ieee80211vap *vap = selbs->ni_vap; 707 struct ieee80211com *ic = selbs->ni_ic; 708 struct ieee80211_node *obss; 709 int canreassoc; 710 711 /* 712 * Committed to selbs, setup state. 713 */ 714 obss = vap->iv_bss; 715 /* 716 * Check if old+new node have the same address in which 717 * case we can reassociate when operating in sta mode. 718 */ 719 canreassoc = (obss != NULL && 720 vap->iv_state == IEEE80211_S_RUN && 721 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 722 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 723 if (obss != NULL) { 724 struct ieee80211_node_table *nt = obss->ni_table; 725 726 copy_bss(selbs, obss); 727 ieee80211_node_decref(obss); /* iv_bss reference */ 728 729 IEEE80211_NODE_LOCK(nt); 730 node_reclaim(nt, obss); /* station table reference */ 731 IEEE80211_NODE_UNLOCK(nt); 732 733 obss = NULL; /* NB: guard against later use */ 734 } 735 736 /* 737 * Delete unusable rates; we've already checked 738 * that the negotiated rate set is acceptable. 739 */ 740 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 741 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 742 743 ieee80211_setcurchan(ic, selbs->ni_chan); 744 /* 745 * Set the erp state (mostly the slot time) to deal with 746 * the auto-select case; this should be redundant if the 747 * mode is locked. 748 */ 749 ieee80211_reset_erp(ic); 750 ieee80211_wme_initparams(vap); 751 752 if (vap->iv_opmode == IEEE80211_M_STA) { 753 if (canreassoc) { 754 /* Reassociate */ 755 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 756 } else { 757 /* 758 * Act as if we received a DEAUTH frame in case we 759 * are invoked from the RUN state. This will cause 760 * us to try to re-authenticate if we are operating 761 * as a station. 762 */ 763 ieee80211_new_state(vap, IEEE80211_S_AUTH, 764 IEEE80211_FC0_SUBTYPE_DEAUTH); 765 } 766 } else 767 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 768 return 1; 769} 770 771int 772ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 773 const struct ieee80211_scan_entry *se) 774{ 775 struct ieee80211com *ic = vap->iv_ic; 776 struct ieee80211_node *ni; 777 778 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 779 if (ni == NULL) { 780 /* XXX msg */ 781 return 0; 782 } 783 784 /* 785 * Expand scan state into node's format. 786 * XXX may not need all this stuff 787 */ 788 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 789 ni->ni_esslen = se->se_ssid[1]; 790 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 791 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 792 ni->ni_intval = se->se_intval; 793 ni->ni_capinfo = se->se_capinfo; 794 ni->ni_chan = chan; 795 ni->ni_timoff = se->se_timoff; 796 ni->ni_fhdwell = se->se_fhdwell; 797 ni->ni_fhindex = se->se_fhindex; 798 ni->ni_erp = se->se_erp; 799 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 800 ni->ni_noise = se->se_noise; 801 if (vap->iv_opmode == IEEE80211_M_STA) { 802 /* NB: only infrastructure mode requires an associd */ 803 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 804 } 805 806 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 807 ieee80211_ies_expand(&ni->ni_ies); 808#ifdef IEEE80211_SUPPORT_SUPERG 809 if (ni->ni_ies.ath_ie != NULL) 810 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 811#endif 812 if (ni->ni_ies.htcap_ie != NULL) 813 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 814 if (ni->ni_ies.htinfo_ie != NULL) 815 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 816#ifdef IEEE80211_SUPPORT_MESH 817 if (ni->ni_ies.meshid_ie != NULL) 818 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 819#endif 820#ifdef IEEE80211_SUPPORT_TDMA 821 if (ni->ni_ies.tdma_ie != NULL) 822 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 823#endif 824 } 825 826 vap->iv_dtim_period = se->se_dtimperiod; 827 vap->iv_dtim_count = 0; 828 829 /* NB: must be after ni_chan is setup */ 830 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 831 IEEE80211_F_DOSORT); 832 if (ieee80211_iserp_rateset(&ni->ni_rates)) 833 ni->ni_flags |= IEEE80211_NODE_ERP; 834 835 /* 836 * Setup HT state for this node if it's available, otherwise 837 * non-STA modes won't pick this state up. 838 * 839 * For IBSS and related modes that don't go through an 840 * association request/response, the only appropriate place 841 * to setup the HT state is here. 842 */ 843 if (ni->ni_ies.htinfo_ie != NULL && 844 ni->ni_ies.htcap_ie != NULL && 845 vap->iv_flags_ht & IEEE80211_FHT_HT) { 846 ieee80211_ht_node_init(ni); 847 ieee80211_ht_updateparams(ni, 848 ni->ni_ies.htcap_ie, 849 ni->ni_ies.htinfo_ie); 850 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 851 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 852 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 853 } 854 /* XXX else check for ath FF? */ 855 /* XXX QoS? Difficult given that WME config is specific to a master */ 856 857 ieee80211_node_setuptxparms(ni); 858 ieee80211_ratectl_node_init(ni); 859 860 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 861} 862 863/* 864 * Leave the specified IBSS/BSS network. The node is assumed to 865 * be passed in with a held reference. 866 */ 867void 868ieee80211_sta_leave(struct ieee80211_node *ni) 869{ 870 struct ieee80211com *ic = ni->ni_ic; 871 872 ic->ic_node_cleanup(ni); 873 ieee80211_notify_node_leave(ni); 874} 875 876/* 877 * Send a deauthenticate frame and drop the station. 878 */ 879void 880ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 881{ 882 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 883 ieee80211_ref_node(ni); 884 if (ni->ni_associd != 0) 885 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 886 ieee80211_node_leave(ni); 887 ieee80211_free_node(ni); 888} 889 890static struct ieee80211_node * 891node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 892{ 893 struct ieee80211_node *ni; 894 895 ni = (struct ieee80211_node *) malloc(sizeof(struct ieee80211_node), 896 M_80211_NODE, M_NOWAIT | M_ZERO); 897 return ni; 898} 899 900/* 901 * Initialize an ie blob with the specified data. If previous 902 * data exists re-use the data block. As a side effect we clear 903 * all references to specific ie's; the caller is required to 904 * recalculate them. 905 */ 906int 907ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 908{ 909 /* NB: assumes data+len are the last fields */ 910 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 911 if (ies->data != NULL && ies->len != len) { 912 /* data size changed */ 913 free(ies->data, M_80211_NODE_IE); 914 ies->data = NULL; 915 } 916 if (ies->data == NULL) { 917 ies->data = (uint8_t *) malloc(len, M_80211_NODE_IE, M_NOWAIT); 918 if (ies->data == NULL) { 919 ies->len = 0; 920 /* NB: pointers have already been zero'd above */ 921 return 0; 922 } 923 } 924 memcpy(ies->data, data, len); 925 ies->len = len; 926 return 1; 927} 928 929/* 930 * Reclaim storage for an ie blob. 931 */ 932void 933ieee80211_ies_cleanup(struct ieee80211_ies *ies) 934{ 935 if (ies->data != NULL) 936 free(ies->data, M_80211_NODE_IE); 937} 938 939/* 940 * Expand an ie blob data contents and to fillin individual 941 * ie pointers. The data blob is assumed to be well-formed; 942 * we don't do any validity checking of ie lengths. 943 */ 944void 945ieee80211_ies_expand(struct ieee80211_ies *ies) 946{ 947 uint8_t *ie; 948 int ielen; 949 950 ie = ies->data; 951 ielen = ies->len; 952 while (ielen > 0) { 953 switch (ie[0]) { 954 case IEEE80211_ELEMID_VENDOR: 955 if (iswpaoui(ie)) 956 ies->wpa_ie = ie; 957 else if (iswmeoui(ie)) 958 ies->wme_ie = ie; 959#ifdef IEEE80211_SUPPORT_SUPERG 960 else if (isatherosoui(ie)) 961 ies->ath_ie = ie; 962#endif 963#ifdef IEEE80211_SUPPORT_TDMA 964 else if (istdmaoui(ie)) 965 ies->tdma_ie = ie; 966#endif 967 break; 968 case IEEE80211_ELEMID_RSN: 969 ies->rsn_ie = ie; 970 break; 971 case IEEE80211_ELEMID_HTCAP: 972 ies->htcap_ie = ie; 973 break; 974 case IEEE80211_ELEMID_HTINFO: 975 ies->htinfo_ie = ie; 976 break; 977#ifdef IEEE80211_SUPPORT_MESH 978 case IEEE80211_ELEMID_MESHID: 979 ies->meshid_ie = ie; 980 break; 981#endif 982 } 983 ielen -= 2 + ie[1]; 984 ie += 2 + ie[1]; 985 } 986} 987 988/* 989 * Reclaim any resources in a node and reset any critical 990 * state. Typically nodes are free'd immediately after, 991 * but in some cases the storage may be reused so we need 992 * to insure consistent state (should probably fix that). 993 */ 994static void 995node_cleanup(struct ieee80211_node *ni) 996{ 997 struct ieee80211vap *vap = ni->ni_vap; 998 struct ieee80211com *ic = ni->ni_ic; 999 int i; 1000 1001 /* NB: preserve ni_table */ 1002 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1003 if (vap->iv_opmode != IEEE80211_M_STA) 1004 vap->iv_ps_sta--; 1005 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1006 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1007 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1008 } 1009 /* 1010 * Cleanup any HT-related state. 1011 */ 1012 if (ni->ni_flags & IEEE80211_NODE_HT) 1013 ieee80211_ht_node_cleanup(ni); 1014#ifdef IEEE80211_SUPPORT_SUPERG 1015 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH) 1016 ieee80211_ff_node_cleanup(ni); 1017#endif 1018#ifdef IEEE80211_SUPPORT_MESH 1019 /* 1020 * Cleanup any mesh-related state. 1021 */ 1022 if (vap->iv_opmode == IEEE80211_M_MBSS) 1023 ieee80211_mesh_node_cleanup(ni); 1024#endif 1025 /* 1026 * Clear any staging queue entries. 1027 */ 1028 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1029 1030 /* 1031 * Clear AREF flag that marks the authorization refcnt bump 1032 * has happened. This is probably not needed as the node 1033 * should always be removed from the table so not found but 1034 * do it just in case. 1035 * Likewise clear the ASSOCID flag as these flags are intended 1036 * to be managed in tandem. 1037 */ 1038 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1039 1040 /* 1041 * Drain power save queue and, if needed, clear TIM. 1042 */ 1043 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1044 vap->iv_set_tim(ni, 0); 1045 1046 ni->ni_associd = 0; 1047 if (ni->ni_challenge != NULL) { 1048 free(ni->ni_challenge, M_80211_NODE); 1049 ni->ni_challenge = NULL; 1050 } 1051 /* 1052 * Preserve SSID, WPA, and WME ie's so the bss node is 1053 * reusable during a re-auth/re-assoc state transition. 1054 * If we remove these data they will not be recreated 1055 * because they come from a probe-response or beacon frame 1056 * which cannot be expected prior to the association-response. 1057 * This should not be an issue when operating in other modes 1058 * as stations leaving always go through a full state transition 1059 * which will rebuild this state. 1060 * 1061 * XXX does this leave us open to inheriting old state? 1062 */ 1063 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1064 if (ni->ni_rxfrag[i] != NULL) { 1065 m_freem(ni->ni_rxfrag[i]); 1066 ni->ni_rxfrag[i] = NULL; 1067 } 1068 /* 1069 * Must be careful here to remove any key map entry w/o a LOR. 1070 */ 1071 ieee80211_node_delucastkey(ni); 1072} 1073 1074static void 1075node_free(struct ieee80211_node *ni) 1076{ 1077 struct ieee80211com *ic = ni->ni_ic; 1078 1079 ieee80211_ratectl_node_deinit(ni); 1080 ic->ic_node_cleanup(ni); 1081 ieee80211_ies_cleanup(&ni->ni_ies); 1082 ieee80211_psq_cleanup(&ni->ni_psq); 1083 free(ni, M_80211_NODE); 1084} 1085 1086static void 1087node_age(struct ieee80211_node *ni) 1088{ 1089 struct ieee80211vap *vap = ni->ni_vap; 1090 1091 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta); 1092 1093 /* 1094 * Age frames on the power save queue. 1095 */ 1096 if (ieee80211_node_psq_age(ni) != 0 && 1097 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1098 vap->iv_set_tim(ni, 0); 1099 /* 1100 * Age out HT resources (e.g. frames on the 1101 * A-MPDU reorder queues). 1102 */ 1103 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1104 ieee80211_ht_node_age(ni); 1105} 1106 1107static int8_t 1108node_getrssi(const struct ieee80211_node *ni) 1109{ 1110 uint32_t avgrssi = ni->ni_avgrssi; 1111 int32_t rssi; 1112 1113 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1114 return 0; 1115 rssi = IEEE80211_RSSI_GET(avgrssi); 1116 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1117} 1118 1119static void 1120node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1121{ 1122 *rssi = node_getrssi(ni); 1123 *noise = ni->ni_noise; 1124} 1125 1126static void 1127node_getmimoinfo(const struct ieee80211_node *ni, 1128 struct ieee80211_mimo_info *info) 1129{ 1130 int i; 1131 uint32_t avgrssi; 1132 int32_t rssi; 1133 1134 bzero(info, sizeof(*info)); 1135 1136 for (i = 0; i < ni->ni_mimo_chains; i++) { 1137 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1138 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1139 info->rssi[i] = 0; 1140 } else { 1141 rssi = IEEE80211_RSSI_GET(avgrssi); 1142 info->rssi[i] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1143 } 1144 info->noise[i] = ni->ni_mimo_noise_ctl[i]; 1145 } 1146 1147 /* XXX ext radios? */ 1148 1149 /* XXX EVM? */ 1150} 1151 1152struct ieee80211_node * 1153ieee80211_alloc_node(struct ieee80211_node_table *nt, 1154 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1155{ 1156 struct ieee80211com *ic = nt->nt_ic; 1157 struct ieee80211_node *ni; 1158 int hash; 1159 1160 ni = ic->ic_node_alloc(vap, macaddr); 1161 if (ni == NULL) { 1162 vap->iv_stats.is_rx_nodealloc++; 1163 return NULL; 1164 } 1165 1166 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1167 "%s %p<%s> in %s table\n", __func__, ni, 1168 ether_sprintf(macaddr), nt->nt_name); 1169 1170 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1171 hash = IEEE80211_NODE_HASH(ic, macaddr); 1172 ieee80211_node_initref(ni); /* mark referenced */ 1173 ni->ni_chan = IEEE80211_CHAN_ANYC; 1174 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1175 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1176 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1177 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1178 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1179 ni->ni_inact_reload = nt->nt_inact_init; 1180 ni->ni_inact = ni->ni_inact_reload; 1181 ni->ni_ath_defkeyix = 0x7fff; 1182 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1183#ifdef IEEE80211_SUPPORT_MESH 1184 if (vap->iv_opmode == IEEE80211_M_MBSS) 1185 ieee80211_mesh_node_init(vap, ni); 1186#endif 1187 IEEE80211_NODE_LOCK(nt); 1188 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1189 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1190 ni->ni_table = nt; 1191 ni->ni_vap = vap; 1192 ni->ni_ic = ic; 1193 IEEE80211_NODE_UNLOCK(nt); 1194 1195 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1196 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1197 1198 ieee80211_ratectl_node_init(ni); 1199 1200 return ni; 1201} 1202 1203/* 1204 * Craft a temporary node suitable for sending a management frame 1205 * to the specified station. We craft only as much state as we 1206 * need to do the work since the node will be immediately reclaimed 1207 * once the send completes. 1208 */ 1209struct ieee80211_node * 1210ieee80211_tmp_node(struct ieee80211vap *vap, 1211 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1212{ 1213 struct ieee80211com *ic = vap->iv_ic; 1214 struct ieee80211_node *ni; 1215 1216 ni = ic->ic_node_alloc(vap, macaddr); 1217 if (ni != NULL) { 1218 struct ieee80211_node *bss = vap->iv_bss; 1219 1220 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1221 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1222 1223 ni->ni_table = NULL; /* NB: pedantic */ 1224 ni->ni_ic = ic; /* NB: needed to set channel */ 1225 ni->ni_vap = vap; 1226 1227 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1228 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1229 ieee80211_node_initref(ni); /* mark referenced */ 1230 /* NB: required by ieee80211_fix_rate */ 1231 ieee80211_node_set_chan(ni, bss->ni_chan); 1232 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1233 IEEE80211_KEYIX_NONE); 1234 ni->ni_txpower = bss->ni_txpower; 1235 /* XXX optimize away */ 1236 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1237 1238 ieee80211_ratectl_node_init(ni); 1239 } else { 1240 /* XXX msg */ 1241 vap->iv_stats.is_rx_nodealloc++; 1242 } 1243 return ni; 1244} 1245 1246struct ieee80211_node * 1247ieee80211_dup_bss(struct ieee80211vap *vap, 1248 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1249{ 1250 struct ieee80211com *ic = vap->iv_ic; 1251 struct ieee80211_node *ni; 1252 1253 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1254 if (ni != NULL) { 1255 struct ieee80211_node *bss = vap->iv_bss; 1256 /* 1257 * Inherit from iv_bss. 1258 */ 1259 copy_bss(ni, bss); 1260 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1261 ieee80211_node_set_chan(ni, bss->ni_chan); 1262 } 1263 return ni; 1264} 1265 1266/* 1267 * Create a bss node for a legacy WDS vap. The far end does 1268 * not associate so we just create create a new node and 1269 * simulate an association. The caller is responsible for 1270 * installing the node as the bss node and handling any further 1271 * setup work like authorizing the port. 1272 */ 1273struct ieee80211_node * 1274ieee80211_node_create_wds(struct ieee80211vap *vap, 1275 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1276{ 1277 struct ieee80211com *ic = vap->iv_ic; 1278 struct ieee80211_node *ni; 1279 1280 /* XXX check if node already in sta table? */ 1281 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1282 if (ni != NULL) { 1283 ni->ni_wdsvap = vap; 1284 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1285 /* 1286 * Inherit any manually configured settings. 1287 */ 1288 copy_bss(ni, vap->iv_bss); 1289 ieee80211_node_set_chan(ni, chan); 1290 /* NB: propagate ssid so available to WPA supplicant */ 1291 ni->ni_esslen = vap->iv_des_ssid[0].len; 1292 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1293 /* NB: no associd for peer */ 1294 /* 1295 * There are no management frames to use to 1296 * discover neighbor capabilities, so blindly 1297 * propagate the local configuration. 1298 */ 1299 if (vap->iv_flags & IEEE80211_F_WME) 1300 ni->ni_flags |= IEEE80211_NODE_QOS; 1301#ifdef IEEE80211_SUPPORT_SUPERG 1302 if (vap->iv_flags & IEEE80211_F_FF) 1303 ni->ni_flags |= IEEE80211_NODE_FF; 1304#endif 1305 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1306 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1307 /* 1308 * Device is HT-capable and HT is enabled for 1309 * the vap; setup HT operation. On return 1310 * ni_chan will be adjusted to an HT channel. 1311 */ 1312 ieee80211_ht_wds_init(ni); 1313 } else { 1314 struct ieee80211_channel *c = ni->ni_chan; 1315 /* 1316 * Force a legacy channel to be used. 1317 */ 1318 c = ieee80211_find_channel(ic, 1319 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1320 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1321 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1322 ni->ni_chan = c; 1323 } 1324 } 1325 return ni; 1326} 1327 1328struct ieee80211_node * 1329#ifdef IEEE80211_DEBUG_REFCNT 1330ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1331 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1332#else 1333ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1334 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1335#endif 1336{ 1337 struct ieee80211_node *ni; 1338 int hash; 1339 1340 IEEE80211_NODE_LOCK_ASSERT(nt); 1341 1342 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1343 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1344 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1345 ieee80211_ref_node(ni); /* mark referenced */ 1346#ifdef IEEE80211_DEBUG_REFCNT 1347 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1348 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1349 func, line, 1350 ni, ether_sprintf(ni->ni_macaddr), 1351 ieee80211_node_refcnt(ni)); 1352#endif 1353 return ni; 1354 } 1355 } 1356 return NULL; 1357} 1358 1359struct ieee80211_node * 1360#ifdef IEEE80211_DEBUG_REFCNT 1361ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1362 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1363#else 1364ieee80211_find_node(struct ieee80211_node_table *nt, 1365 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1366#endif 1367{ 1368 struct ieee80211_node *ni; 1369 1370 IEEE80211_NODE_LOCK(nt); 1371 ni = ieee80211_find_node_locked(nt, macaddr); 1372 IEEE80211_NODE_UNLOCK(nt); 1373 return ni; 1374} 1375 1376struct ieee80211_node * 1377#ifdef IEEE80211_DEBUG_REFCNT 1378ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1379 const struct ieee80211vap *vap, 1380 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1381#else 1382ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1383 const struct ieee80211vap *vap, 1384 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1385#endif 1386{ 1387 struct ieee80211_node *ni; 1388 int hash; 1389 1390 IEEE80211_NODE_LOCK_ASSERT(nt); 1391 1392 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1393 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1394 if (ni->ni_vap == vap && 1395 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1396 ieee80211_ref_node(ni); /* mark referenced */ 1397#ifdef IEEE80211_DEBUG_REFCNT 1398 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1399 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1400 func, line, 1401 ni, ether_sprintf(ni->ni_macaddr), 1402 ieee80211_node_refcnt(ni)); 1403#endif 1404 return ni; 1405 } 1406 } 1407 return NULL; 1408} 1409 1410struct ieee80211_node * 1411#ifdef IEEE80211_DEBUG_REFCNT 1412ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1413 const struct ieee80211vap *vap, 1414 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1415#else 1416ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1417 const struct ieee80211vap *vap, 1418 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1419#endif 1420{ 1421 struct ieee80211_node *ni; 1422 1423 IEEE80211_NODE_LOCK(nt); 1424 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1425 IEEE80211_NODE_UNLOCK(nt); 1426 return ni; 1427} 1428 1429/* 1430 * Fake up a node; this handles node discovery in adhoc mode. 1431 * Note that for the driver's benefit we we treat this like 1432 * an association so the driver has an opportunity to setup 1433 * it's private state. 1434 */ 1435struct ieee80211_node * 1436ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1437 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1438{ 1439 struct ieee80211_node *ni; 1440 1441 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1442 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1443 ni = ieee80211_dup_bss(vap, macaddr); 1444 if (ni != NULL) { 1445 struct ieee80211com *ic = vap->iv_ic; 1446 1447 /* XXX no rate negotiation; just dup */ 1448 ni->ni_rates = vap->iv_bss->ni_rates; 1449 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1450 ni->ni_flags |= IEEE80211_NODE_ERP; 1451 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1452 /* 1453 * In adhoc demo mode there are no management 1454 * frames to use to discover neighbor capabilities, 1455 * so blindly propagate the local configuration 1456 * so we can do interesting things (e.g. use 1457 * WME to disable ACK's). 1458 */ 1459 if (vap->iv_flags & IEEE80211_F_WME) 1460 ni->ni_flags |= IEEE80211_NODE_QOS; 1461#ifdef IEEE80211_SUPPORT_SUPERG 1462 if (vap->iv_flags & IEEE80211_F_FF) 1463 ni->ni_flags |= IEEE80211_NODE_FF; 1464#endif 1465 } 1466 ieee80211_node_setuptxparms(ni); 1467 ieee80211_ratectl_node_init(ni); 1468 if (ic->ic_newassoc != NULL) 1469 ic->ic_newassoc(ni, 1); 1470 /* XXX not right for 802.1x/WPA */ 1471 ieee80211_node_authorize(ni); 1472 } 1473 return ni; 1474} 1475 1476void 1477ieee80211_init_neighbor(struct ieee80211_node *ni, 1478 const struct ieee80211_frame *wh, 1479 const struct ieee80211_scanparams *sp) 1480{ 1481 int do_ht_setup = 0; 1482 1483 ni->ni_esslen = sp->ssid[1]; 1484 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1485 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1486 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1487 ni->ni_intval = sp->bintval; 1488 ni->ni_capinfo = sp->capinfo; 1489 ni->ni_chan = ni->ni_ic->ic_curchan; 1490 ni->ni_fhdwell = sp->fhdwell; 1491 ni->ni_fhindex = sp->fhindex; 1492 ni->ni_erp = sp->erp; 1493 ni->ni_timoff = sp->timoff; 1494#ifdef IEEE80211_SUPPORT_MESH 1495 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1496 ieee80211_mesh_init_neighbor(ni, wh, sp); 1497#endif 1498 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1499 ieee80211_ies_expand(&ni->ni_ies); 1500 if (ni->ni_ies.wme_ie != NULL) 1501 ni->ni_flags |= IEEE80211_NODE_QOS; 1502 else 1503 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1504#ifdef IEEE80211_SUPPORT_SUPERG 1505 if (ni->ni_ies.ath_ie != NULL) 1506 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1507#endif 1508 if (ni->ni_ies.htcap_ie != NULL) 1509 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1510 if (ni->ni_ies.htinfo_ie != NULL) 1511 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1512 1513 if ((ni->ni_ies.htcap_ie != NULL) && 1514 (ni->ni_ies.htinfo_ie != NULL) && 1515 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1516 do_ht_setup = 1; 1517 } 1518 } 1519 1520 /* NB: must be after ni_chan is setup */ 1521 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1522 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1523 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1524 1525 /* 1526 * If the neighbor is HT compatible, flip that on. 1527 */ 1528 if (do_ht_setup) { 1529 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1530 "%s: doing HT setup\n", __func__); 1531 ieee80211_ht_node_init(ni); 1532 ieee80211_ht_updateparams(ni, 1533 ni->ni_ies.htcap_ie, 1534 ni->ni_ies.htinfo_ie); 1535 ieee80211_setup_htrates(ni, 1536 ni->ni_ies.htcap_ie, 1537 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1538 ieee80211_setup_basic_htrates(ni, 1539 ni->ni_ies.htinfo_ie); 1540 ieee80211_node_setuptxparms(ni); 1541 ieee80211_ratectl_node_init(ni); 1542 } 1543} 1544 1545/* 1546 * Do node discovery in adhoc mode on receipt of a beacon 1547 * or probe response frame. Note that for the driver's 1548 * benefit we we treat this like an association so the 1549 * driver has an opportunity to setup it's private state. 1550 */ 1551struct ieee80211_node * 1552ieee80211_add_neighbor(struct ieee80211vap *vap, 1553 const struct ieee80211_frame *wh, 1554 const struct ieee80211_scanparams *sp) 1555{ 1556 struct ieee80211_node *ni; 1557 1558 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1559 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1560 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1561 if (ni != NULL) { 1562 struct ieee80211com *ic = vap->iv_ic; 1563 1564 ieee80211_init_neighbor(ni, wh, sp); 1565 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1566 ni->ni_flags |= IEEE80211_NODE_ERP; 1567 ieee80211_node_setuptxparms(ni); 1568 ieee80211_ratectl_node_init(ni); 1569 if (ic->ic_newassoc != NULL) 1570 ic->ic_newassoc(ni, 1); 1571 /* XXX not right for 802.1x/WPA */ 1572 ieee80211_node_authorize(ni); 1573 } 1574 return ni; 1575} 1576 1577#define IS_PROBEREQ(wh) \ 1578 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1579 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1580#define IS_BCAST_PROBEREQ(wh) \ 1581 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1582 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1583 1584static __inline struct ieee80211_node * 1585_find_rxnode(struct ieee80211_node_table *nt, 1586 const struct ieee80211_frame_min *wh) 1587{ 1588 if (IS_BCAST_PROBEREQ(wh)) 1589 return NULL; /* spam bcast probe req to all vap's */ 1590 return ieee80211_find_node_locked(nt, wh->i_addr2); 1591} 1592 1593/* 1594 * Locate the node for sender, track state, and then pass the 1595 * (referenced) node up to the 802.11 layer for its use. Note 1596 * we can return NULL if the sender is not in the table. 1597 */ 1598struct ieee80211_node * 1599#ifdef IEEE80211_DEBUG_REFCNT 1600ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1601 const struct ieee80211_frame_min *wh, const char *func, int line) 1602#else 1603ieee80211_find_rxnode(struct ieee80211com *ic, 1604 const struct ieee80211_frame_min *wh) 1605#endif 1606{ 1607 struct ieee80211_node_table *nt; 1608 struct ieee80211_node *ni; 1609 1610 nt = &ic->ic_sta; 1611 IEEE80211_NODE_LOCK(nt); 1612 ni = _find_rxnode(nt, wh); 1613 IEEE80211_NODE_UNLOCK(nt); 1614 1615 return ni; 1616} 1617 1618/* 1619 * Like ieee80211_find_rxnode but use the supplied h/w 1620 * key index as a hint to locate the node in the key 1621 * mapping table. If an entry is present at the key 1622 * index we return it; otherwise do a normal lookup and 1623 * update the mapping table if the station has a unicast 1624 * key assigned to it. 1625 */ 1626struct ieee80211_node * 1627#ifdef IEEE80211_DEBUG_REFCNT 1628ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1629 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1630 const char *func, int line) 1631#else 1632ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1633 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1634#endif 1635{ 1636 struct ieee80211_node_table *nt; 1637 struct ieee80211_node *ni; 1638 1639 nt = &ic->ic_sta; 1640 IEEE80211_NODE_LOCK(nt); 1641 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1642 ni = nt->nt_keyixmap[keyix]; 1643 else 1644 ni = NULL; 1645 if (ni == NULL) { 1646 ni = _find_rxnode(nt, wh); 1647 if (ni != NULL && nt->nt_keyixmap != NULL) { 1648 /* 1649 * If the station has a unicast key cache slot 1650 * assigned update the key->node mapping table. 1651 */ 1652 keyix = ni->ni_ucastkey.wk_rxkeyix; 1653 /* XXX can keyixmap[keyix] != NULL? */ 1654 if (keyix < nt->nt_keyixmax && 1655 nt->nt_keyixmap[keyix] == NULL) { 1656 IEEE80211_DPRINTF(ni->ni_vap, 1657 IEEE80211_MSG_NODE, 1658 "%s: add key map entry %p<%s> refcnt %d\n", 1659 __func__, ni, ether_sprintf(ni->ni_macaddr), 1660 ieee80211_node_refcnt(ni)+1); 1661 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1662 } 1663 } 1664 } else { 1665 if (IS_BCAST_PROBEREQ(wh)) 1666 ni = NULL; /* spam bcast probe req to all vap's */ 1667 else 1668 ieee80211_ref_node(ni); 1669 } 1670 IEEE80211_NODE_UNLOCK(nt); 1671 1672 return ni; 1673} 1674#undef IS_BCAST_PROBEREQ 1675#undef IS_PROBEREQ 1676 1677/* 1678 * Return a reference to the appropriate node for sending 1679 * a data frame. This handles node discovery in adhoc networks. 1680 */ 1681struct ieee80211_node * 1682#ifdef IEEE80211_DEBUG_REFCNT 1683ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1684 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1685 const char *func, int line) 1686#else 1687ieee80211_find_txnode(struct ieee80211vap *vap, 1688 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1689#endif 1690{ 1691 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1692 struct ieee80211_node *ni; 1693 1694 /* 1695 * The destination address should be in the node table 1696 * unless this is a multicast/broadcast frame. We can 1697 * also optimize station mode operation, all frames go 1698 * to the bss node. 1699 */ 1700 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1701 IEEE80211_NODE_LOCK(nt); 1702 if (vap->iv_opmode == IEEE80211_M_STA || 1703 vap->iv_opmode == IEEE80211_M_WDS || 1704 IEEE80211_IS_MULTICAST(macaddr)) 1705 ni = ieee80211_ref_node(vap->iv_bss); 1706 else 1707 ni = ieee80211_find_node_locked(nt, macaddr); 1708 IEEE80211_NODE_UNLOCK(nt); 1709 1710 if (ni == NULL) { 1711 if (vap->iv_opmode == IEEE80211_M_IBSS || 1712 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1713 /* 1714 * In adhoc mode cons up a node for the destination. 1715 * Note that we need an additional reference for the 1716 * caller to be consistent with 1717 * ieee80211_find_node_locked. 1718 */ 1719 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1720 if (ni != NULL) 1721 (void) ieee80211_ref_node(ni); 1722 } else { 1723 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1724 "no node, discard frame (%s)", __func__); 1725 vap->iv_stats.is_tx_nonode++; 1726 } 1727 } 1728 return ni; 1729} 1730 1731static void 1732_ieee80211_free_node(struct ieee80211_node *ni) 1733{ 1734 struct ieee80211_node_table *nt = ni->ni_table; 1735 1736 /* 1737 * NB: careful about referencing the vap as it may be 1738 * gone if the last reference was held by a driver. 1739 * We know the com will always be present so it's safe 1740 * to use ni_ic below to reclaim resources. 1741 */ 1742#if 0 1743 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1744 "%s %p<%s> in %s table\n", __func__, ni, 1745 ether_sprintf(ni->ni_macaddr), 1746 nt != NULL ? nt->nt_name : "<gone>"); 1747#endif 1748 if (ni->ni_associd != 0) { 1749 struct ieee80211vap *vap = ni->ni_vap; 1750 if (vap->iv_aid_bitmap != NULL) 1751 IEEE80211_AID_CLR(vap, ni->ni_associd); 1752 } 1753 if (nt != NULL) { 1754 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1755 LIST_REMOVE(ni, ni_hash); 1756 } 1757 ni->ni_ic->ic_node_free(ni); 1758} 1759 1760/* 1761 * Clear any entry in the unicast key mapping table. 1762 */ 1763static int 1764node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1765{ 1766 ieee80211_keyix keyix; 1767 1768 keyix = ni->ni_ucastkey.wk_rxkeyix; 1769 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1770 nt->nt_keyixmap[keyix] == ni) { 1771 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1772 "%s: %p<%s> clear key map entry %u\n", 1773 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 1774 nt->nt_keyixmap[keyix] = NULL; 1775 ieee80211_node_decref(ni); 1776 return 1; 1777 } 1778 1779 return 0; 1780} 1781 1782void 1783#ifdef IEEE80211_DEBUG_REFCNT 1784ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1785#else 1786ieee80211_free_node(struct ieee80211_node *ni) 1787#endif 1788{ 1789 struct ieee80211_node_table *nt = ni->ni_table; 1790 1791#ifdef IEEE80211_DEBUG_REFCNT 1792 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1793 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1794 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1795#endif 1796 if (nt != NULL) { 1797 IEEE80211_NODE_LOCK(nt); 1798 if (ieee80211_node_dectestref(ni)) { 1799 /* 1800 * Last reference, reclaim state. 1801 */ 1802 _ieee80211_free_node(ni); 1803 } else if (ieee80211_node_refcnt(ni) == 1) 1804 if (node_clear_keyixmap(nt, ni)) 1805 _ieee80211_free_node(ni); 1806 IEEE80211_NODE_UNLOCK(nt); 1807 } else { 1808 if (ieee80211_node_dectestref(ni)) 1809 _ieee80211_free_node(ni); 1810 } 1811} 1812 1813/* 1814 * Reclaim a unicast key and clear any key cache state. 1815 */ 1816int 1817ieee80211_node_delucastkey(struct ieee80211_node *ni) 1818{ 1819 struct ieee80211com *ic = ni->ni_ic; 1820 struct ieee80211_node_table *nt = &ic->ic_sta; 1821 struct ieee80211_node *nikey; 1822 ieee80211_keyix keyix; 1823 int isowned, status; 1824 1825 /* 1826 * NB: We must beware of LOR here; deleting the key 1827 * can cause the crypto layer to block traffic updates 1828 * which can generate a LOR against the node table lock; 1829 * grab it here and stash the key index for our use below. 1830 * 1831 * Must also beware of recursion on the node table lock. 1832 * When called from node_cleanup we may already have 1833 * the node table lock held. Unfortunately there's no 1834 * way to separate out this path so we must do this 1835 * conditionally. 1836 */ 1837 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1838 if (!isowned) 1839 IEEE80211_NODE_LOCK(nt); 1840 nikey = NULL; 1841 status = 1; /* NB: success */ 1842 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1843 keyix = ni->ni_ucastkey.wk_rxkeyix; 1844 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1845 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1846 nikey = nt->nt_keyixmap[keyix]; 1847 nt->nt_keyixmap[keyix] = NULL; 1848 } 1849 } 1850 if (!isowned) 1851 IEEE80211_NODE_UNLOCK(nt); 1852 1853 if (nikey != NULL) { 1854 KASSERT(nikey == ni, 1855 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1856 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1857 "%s: delete key map entry %p<%s> refcnt %d\n", 1858 __func__, ni, ether_sprintf(ni->ni_macaddr), 1859 ieee80211_node_refcnt(ni)-1); 1860 ieee80211_free_node(ni); 1861 } 1862 return status; 1863} 1864 1865/* 1866 * Reclaim a node. If this is the last reference count then 1867 * do the normal free work. Otherwise remove it from the node 1868 * table and mark it gone by clearing the back-reference. 1869 */ 1870static void 1871node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1872{ 1873 1874 IEEE80211_NODE_LOCK_ASSERT(nt); 1875 1876 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1877 "%s: remove %p<%s> from %s table, refcnt %d\n", 1878 __func__, ni, ether_sprintf(ni->ni_macaddr), 1879 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1880 /* 1881 * Clear any entry in the unicast key mapping table. 1882 * We need to do it here so rx lookups don't find it 1883 * in the mapping table even if it's not in the hash 1884 * table. We cannot depend on the mapping table entry 1885 * being cleared because the node may not be free'd. 1886 */ 1887 (void)node_clear_keyixmap(nt, ni); 1888 if (!ieee80211_node_dectestref(ni)) { 1889 /* 1890 * Other references are present, just remove the 1891 * node from the table so it cannot be found. When 1892 * the references are dropped storage will be 1893 * reclaimed. 1894 */ 1895 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1896 LIST_REMOVE(ni, ni_hash); 1897 ni->ni_table = NULL; /* clear reference */ 1898 } else 1899 _ieee80211_free_node(ni); 1900} 1901 1902/* 1903 * Node table support. 1904 */ 1905 1906static void 1907ieee80211_node_table_init(struct ieee80211com *ic, 1908 struct ieee80211_node_table *nt, 1909 const char *name, int inact, int keyixmax) 1910{ 1911 struct ifnet *ifp = ic->ic_ifp; 1912 1913 nt->nt_ic = ic; 1914 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname); 1915 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname); 1916 TAILQ_INIT(&nt->nt_node); 1917 nt->nt_name = name; 1918 nt->nt_scangen = 1; 1919 nt->nt_inact_init = inact; 1920 nt->nt_keyixmax = keyixmax; 1921 if (nt->nt_keyixmax > 0) { 1922 nt->nt_keyixmap = (struct ieee80211_node **) malloc( 1923 keyixmax * sizeof(struct ieee80211_node *), 1924 M_80211_NODE, M_NOWAIT | M_ZERO); 1925 if (nt->nt_keyixmap == NULL) 1926 if_printf(ic->ic_ifp, 1927 "Cannot allocate key index map with %u entries\n", 1928 keyixmax); 1929 } else 1930 nt->nt_keyixmap = NULL; 1931} 1932 1933static void 1934ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1935 struct ieee80211vap *match) 1936{ 1937 struct ieee80211_node *ni, *next; 1938 1939 IEEE80211_NODE_LOCK(nt); 1940 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1941 if (match != NULL && ni->ni_vap != match) 1942 continue; 1943 /* XXX can this happen? if so need's work */ 1944 if (ni->ni_associd != 0) { 1945 struct ieee80211vap *vap = ni->ni_vap; 1946 1947 if (vap->iv_auth->ia_node_leave != NULL) 1948 vap->iv_auth->ia_node_leave(ni); 1949 if (vap->iv_aid_bitmap != NULL) 1950 IEEE80211_AID_CLR(vap, ni->ni_associd); 1951 } 1952 ni->ni_wdsvap = NULL; /* clear reference */ 1953 node_reclaim(nt, ni); 1954 } 1955 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1956 /* 1957 * Make a separate pass to clear references to this vap 1958 * held by DWDS entries. They will not be matched above 1959 * because ni_vap will point to the ap vap but we still 1960 * need to clear ni_wdsvap when the WDS vap is destroyed 1961 * and/or reset. 1962 */ 1963 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1964 if (ni->ni_wdsvap == match) 1965 ni->ni_wdsvap = NULL; 1966 } 1967 IEEE80211_NODE_UNLOCK(nt); 1968} 1969 1970static void 1971ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1972{ 1973 ieee80211_node_table_reset(nt, NULL); 1974 if (nt->nt_keyixmap != NULL) { 1975#ifdef DIAGNOSTIC 1976 /* XXX verify all entries are NULL */ 1977 int i; 1978 for (i = 0; i < nt->nt_keyixmax; i++) 1979 if (nt->nt_keyixmap[i] != NULL) 1980 printf("%s: %s[%u] still active\n", __func__, 1981 nt->nt_name, i); 1982#endif 1983 free(nt->nt_keyixmap, M_80211_NODE); 1984 nt->nt_keyixmap = NULL; 1985 } 1986 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1987 IEEE80211_NODE_LOCK_DESTROY(nt); 1988} 1989 1990/* 1991 * Timeout inactive stations and do related housekeeping. 1992 * Note that we cannot hold the node lock while sending a 1993 * frame as this would lead to a LOR. Instead we use a 1994 * generation number to mark nodes that we've scanned and 1995 * drop the lock and restart a scan if we have to time out 1996 * a node. Since we are single-threaded by virtue of 1997 * controlling the inactivity timer we can be sure this will 1998 * process each node only once. 1999 */ 2000static void 2001ieee80211_timeout_stations(struct ieee80211com *ic) 2002{ 2003 struct ieee80211_node_table *nt = &ic->ic_sta; 2004 struct ieee80211vap *vap; 2005 struct ieee80211_node *ni; 2006 int gen = 0; 2007 2008 IEEE80211_NODE_ITERATE_LOCK(nt); 2009 gen = ++nt->nt_scangen; 2010restart: 2011 IEEE80211_NODE_LOCK(nt); 2012 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2013 if (ni->ni_scangen == gen) /* previously handled */ 2014 continue; 2015 ni->ni_scangen = gen; 2016 /* 2017 * Ignore entries for which have yet to receive an 2018 * authentication frame. These are transient and 2019 * will be reclaimed when the last reference to them 2020 * goes away (when frame xmits complete). 2021 */ 2022 vap = ni->ni_vap; 2023 /* 2024 * Only process stations when in RUN state. This 2025 * insures, for example, that we don't timeout an 2026 * inactive station during CAC. Note that CSA state 2027 * is actually handled in ieee80211_node_timeout as 2028 * it applies to more than timeout processing. 2029 */ 2030 if (vap->iv_state != IEEE80211_S_RUN) 2031 continue; 2032 /* XXX can vap be NULL? */ 2033 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2034 vap->iv_opmode == IEEE80211_M_STA) && 2035 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2036 continue; 2037 /* 2038 * Free fragment if not needed anymore 2039 * (last fragment older than 1s). 2040 * XXX doesn't belong here, move to node_age 2041 */ 2042 if (ni->ni_rxfrag[0] != NULL && 2043 ticks > ni->ni_rxfragstamp + hz) { 2044 m_freem(ni->ni_rxfrag[0]); 2045 ni->ni_rxfrag[0] = NULL; 2046 } 2047 if (ni->ni_inact > 0) { 2048 ni->ni_inact--; 2049 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2050 "%s: inact %u inact_reload %u nrates %u", 2051 __func__, ni->ni_inact, ni->ni_inact_reload, 2052 ni->ni_rates.rs_nrates); 2053 } 2054 /* 2055 * Special case ourself; we may be idle for extended periods 2056 * of time and regardless reclaiming our state is wrong. 2057 * XXX run ic_node_age 2058 */ 2059 if (ni == vap->iv_bss) 2060 continue; 2061 if (ni->ni_associd != 0 || 2062 (vap->iv_opmode == IEEE80211_M_IBSS || 2063 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2064 /* 2065 * Age/drain resources held by the station. 2066 */ 2067 ic->ic_node_age(ni); 2068 /* 2069 * Probe the station before time it out. We 2070 * send a null data frame which may not be 2071 * universally supported by drivers (need it 2072 * for ps-poll support so it should be...). 2073 * 2074 * XXX don't probe the station unless we've 2075 * received a frame from them (and have 2076 * some idea of the rates they are capable 2077 * of); this will get fixed more properly 2078 * soon with better handling of the rate set. 2079 */ 2080 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2081 (0 < ni->ni_inact && 2082 ni->ni_inact <= vap->iv_inact_probe) && 2083 ni->ni_rates.rs_nrates != 0) { 2084 IEEE80211_NOTE(vap, 2085 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2086 ni, "%s", 2087 "probe station due to inactivity"); 2088 /* 2089 * Grab a reference before unlocking the table 2090 * so the node cannot be reclaimed before we 2091 * send the frame. ieee80211_send_nulldata 2092 * understands we've done this and reclaims the 2093 * ref for us as needed. 2094 */ 2095 ieee80211_ref_node(ni); 2096 IEEE80211_NODE_UNLOCK(nt); 2097 ieee80211_send_nulldata(ni); 2098 /* XXX stat? */ 2099 goto restart; 2100 } 2101 } 2102 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2103 ni->ni_inact <= 0) { 2104 IEEE80211_NOTE(vap, 2105 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2106 "station timed out due to inactivity " 2107 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2108 /* 2109 * Send a deauthenticate frame and drop the station. 2110 * This is somewhat complicated due to reference counts 2111 * and locking. At this point a station will typically 2112 * have a reference count of 1. ieee80211_node_leave 2113 * will do a "free" of the node which will drop the 2114 * reference count. But in the meantime a reference 2115 * wil be held by the deauth frame. The actual reclaim 2116 * of the node will happen either after the tx is 2117 * completed or by ieee80211_node_leave. 2118 * 2119 * Separately we must drop the node lock before sending 2120 * in case the driver takes a lock, as this can result 2121 * in a LOR between the node lock and the driver lock. 2122 */ 2123 ieee80211_ref_node(ni); 2124 IEEE80211_NODE_UNLOCK(nt); 2125 if (ni->ni_associd != 0) { 2126 IEEE80211_SEND_MGMT(ni, 2127 IEEE80211_FC0_SUBTYPE_DEAUTH, 2128 IEEE80211_REASON_AUTH_EXPIRE); 2129 } 2130 ieee80211_node_leave(ni); 2131 ieee80211_free_node(ni); 2132 vap->iv_stats.is_node_timeout++; 2133 goto restart; 2134 } 2135 } 2136 IEEE80211_NODE_UNLOCK(nt); 2137 2138 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2139} 2140 2141/* 2142 * Aggressively reclaim resources. This should be used 2143 * only in a critical situation to reclaim mbuf resources. 2144 */ 2145void 2146ieee80211_drain(struct ieee80211com *ic) 2147{ 2148 struct ieee80211_node_table *nt = &ic->ic_sta; 2149 struct ieee80211vap *vap; 2150 struct ieee80211_node *ni; 2151 2152 IEEE80211_NODE_LOCK(nt); 2153 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2154 /* 2155 * Ignore entries for which have yet to receive an 2156 * authentication frame. These are transient and 2157 * will be reclaimed when the last reference to them 2158 * goes away (when frame xmits complete). 2159 */ 2160 vap = ni->ni_vap; 2161 /* 2162 * Only process stations when in RUN state. This 2163 * insures, for example, that we don't timeout an 2164 * inactive station during CAC. Note that CSA state 2165 * is actually handled in ieee80211_node_timeout as 2166 * it applies to more than timeout processing. 2167 */ 2168 if (vap->iv_state != IEEE80211_S_RUN) 2169 continue; 2170 /* XXX can vap be NULL? */ 2171 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2172 vap->iv_opmode == IEEE80211_M_STA) && 2173 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2174 continue; 2175 /* 2176 * Free fragments. 2177 * XXX doesn't belong here, move to node_drain 2178 */ 2179 if (ni->ni_rxfrag[0] != NULL) { 2180 m_freem(ni->ni_rxfrag[0]); 2181 ni->ni_rxfrag[0] = NULL; 2182 } 2183 /* 2184 * Drain resources held by the station. 2185 */ 2186 ic->ic_node_drain(ni); 2187 } 2188 IEEE80211_NODE_UNLOCK(nt); 2189} 2190 2191/* 2192 * Per-ieee80211com inactivity timer callback. 2193 */ 2194void 2195ieee80211_node_timeout(void *arg) 2196{ 2197 struct ieee80211com *ic = arg; 2198 2199 /* 2200 * Defer timeout processing if a channel switch is pending. 2201 * We typically need to be mute so not doing things that 2202 * might generate frames is good to handle in one place. 2203 * Supressing the station timeout processing may extend the 2204 * lifetime of inactive stations (by not decrementing their 2205 * idle counters) but this should be ok unless the CSA is 2206 * active for an unusually long time. 2207 */ 2208 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2209 ieee80211_scan_timeout(ic); 2210 ieee80211_timeout_stations(ic); 2211 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2212 2213 IEEE80211_LOCK(ic); 2214 ieee80211_erp_timeout(ic); 2215 ieee80211_ht_timeout(ic); 2216 IEEE80211_UNLOCK(ic); 2217 } 2218 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2219 ieee80211_node_timeout, ic); 2220} 2221 2222/* 2223 * Iterate over the node table and return an array of ref'ed nodes. 2224 * 2225 * This is separated out from calling the actual node function so that 2226 * no LORs will occur. 2227 * 2228 * If there are too many nodes (ie, the number of nodes doesn't fit 2229 * within 'max_aid' entries) then the node references will be freed 2230 * and an error will be returned. 2231 * 2232 * The responsibility of allocating and freeing "ni_arr" is up to 2233 * the caller. 2234 */ 2235int 2236ieee80211_iterate_nt(struct ieee80211_node_table *nt, 2237 struct ieee80211_node **ni_arr, uint16_t max_aid) 2238{ 2239 u_int gen; 2240 int i, j, ret; 2241 struct ieee80211_node *ni; 2242 2243 IEEE80211_NODE_ITERATE_LOCK(nt); 2244 IEEE80211_NODE_LOCK(nt); 2245 2246 gen = ++nt->nt_scangen; 2247 i = ret = 0; 2248 2249 /* 2250 * We simply assume here that since the node 2251 * scan generation doesn't change (as 2252 * we are holding both the node table and 2253 * node table iteration locks), we can simply 2254 * assign it to the node here. 2255 */ 2256 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2257 if (i >= max_aid) { 2258 ret = E2BIG; 2259 if_printf(nt->nt_ic->ic_ifp, 2260 "Node array overflow: max=%u", max_aid); 2261 break; 2262 } 2263 ni_arr[i] = ieee80211_ref_node(ni); 2264 ni_arr[i]->ni_scangen = gen; 2265 i++; 2266 } 2267 2268 /* 2269 * It's safe to unlock here. 2270 * 2271 * If we're successful, the list is returned. 2272 * If we're unsuccessful, the list is ignored 2273 * and we remove our references. 2274 * 2275 * This avoids any potential LOR with 2276 * ieee80211_free_node(). 2277 */ 2278 IEEE80211_NODE_UNLOCK(nt); 2279 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2280 2281 /* 2282 * If ret is non-zero, we hit some kind of error. 2283 * Rather than walking some nodes, we'll walk none 2284 * of them. 2285 */ 2286 if (ret) { 2287 for (j = 0; j < i; j++) { 2288 /* ieee80211_free_node() locks by itself */ 2289 ieee80211_free_node(ni_arr[j]); 2290 } 2291 } 2292 2293 return (ret); 2294} 2295 2296/* 2297 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2298 * reference in the source. 2299 * 2300 * Note that this fetches 'max_aid' from the first VAP, rather than finding 2301 * the largest max_aid from all VAPs. 2302 */ 2303void 2304ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2305 ieee80211_iter_func *f, void *arg) 2306{ 2307 struct ieee80211_node **ni_arr; 2308 size_t size; 2309 int i; 2310 uint16_t max_aid; 2311 struct ieee80211vap *vap; 2312 2313 /* Overdoing it default */ 2314 max_aid = IEEE80211_AID_MAX; 2315 2316 /* Handle the case of there being no vaps just yet */ 2317 vap = TAILQ_FIRST(&nt->nt_ic->ic_vaps); 2318 if (vap != NULL) 2319 max_aid = vap->iv_max_aid; 2320 2321 size = max_aid * sizeof(struct ieee80211_node *); 2322 ni_arr = (struct ieee80211_node **) malloc(size, M_80211_NODE, 2323 M_NOWAIT | M_ZERO); 2324 if (ni_arr == NULL) 2325 return; 2326 2327 /* 2328 * If this fails, the node table won't have any 2329 * valid entries - ieee80211_iterate_nt() frees 2330 * the references to them. So don't try walking 2331 * the table; just skip to the end and free the 2332 * temporary memory. 2333 */ 2334 if (ieee80211_iterate_nt(nt, ni_arr, max_aid) != 0) 2335 goto done; 2336 2337 for (i = 0; i < max_aid; i++) { 2338 if (ni_arr[i] == NULL) /* end of the list */ 2339 break; 2340 (*f)(arg, ni_arr[i]); 2341 /* ieee80211_free_node() locks by itself */ 2342 ieee80211_free_node(ni_arr[i]); 2343 } 2344 2345done: 2346 free(ni_arr, M_80211_NODE); 2347} 2348 2349void 2350ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2351{ 2352 printf("0x%p: mac %s refcnt %d\n", ni, 2353 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2354 printf("\tscangen %u authmode %u flags 0x%x\n", 2355 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2356 printf("\tassocid 0x%x txpower %u vlan %u\n", 2357 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2358 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2359 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2360 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2361 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2362 ni->ni_rxfragstamp); 2363 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2364 node_getrssi(ni), ni->ni_noise, 2365 ni->ni_intval, ni->ni_capinfo); 2366 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2367 ether_sprintf(ni->ni_bssid), 2368 ni->ni_esslen, ni->ni_essid, 2369 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2370 printf("\tinact %u inact_reload %u txrate %u\n", 2371 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2372 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2373 ni->ni_htcap, ni->ni_htparam, 2374 ni->ni_htctlchan, ni->ni_ht2ndchan); 2375 printf("\thtopmode %x htstbc %x chw %u\n", 2376 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2377} 2378 2379void 2380ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2381{ 2382 ieee80211_iterate_nodes(nt, 2383 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2384} 2385 2386static void 2387ieee80211_notify_erp_locked(struct ieee80211com *ic) 2388{ 2389 struct ieee80211vap *vap; 2390 2391 IEEE80211_LOCK_ASSERT(ic); 2392 2393 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2394 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2395 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2396} 2397 2398void 2399ieee80211_notify_erp(struct ieee80211com *ic) 2400{ 2401 IEEE80211_LOCK(ic); 2402 ieee80211_notify_erp_locked(ic); 2403 IEEE80211_UNLOCK(ic); 2404} 2405 2406/* 2407 * Handle a station joining an 11g network. 2408 */ 2409static void 2410ieee80211_node_join_11g(struct ieee80211_node *ni) 2411{ 2412 struct ieee80211com *ic = ni->ni_ic; 2413 2414 IEEE80211_LOCK_ASSERT(ic); 2415 2416 /* 2417 * Station isn't capable of short slot time. Bump 2418 * the count of long slot time stations and disable 2419 * use of short slot time. Note that the actual switch 2420 * over to long slot time use may not occur until the 2421 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2422 */ 2423 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2424 ic->ic_longslotsta++; 2425 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2426 "station needs long slot time, count %d", 2427 ic->ic_longslotsta); 2428 /* XXX vap's w/ conflicting needs won't work */ 2429 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2430 /* 2431 * Don't force slot time when switched to turbo 2432 * mode as non-ERP stations won't be present; this 2433 * need only be done when on the normal G channel. 2434 */ 2435 ieee80211_set_shortslottime(ic, 0); 2436 } 2437 } 2438 /* 2439 * If the new station is not an ERP station 2440 * then bump the counter and enable protection 2441 * if configured. 2442 */ 2443 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2444 ic->ic_nonerpsta++; 2445 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2446 "station is !ERP, %d non-ERP stations associated", 2447 ic->ic_nonerpsta); 2448 /* 2449 * If station does not support short preamble 2450 * then we must enable use of Barker preamble. 2451 */ 2452 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2453 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2454 "%s", "station needs long preamble"); 2455 ic->ic_flags |= IEEE80211_F_USEBARKER; 2456 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2457 } 2458 /* 2459 * If protection is configured and this is the first 2460 * indication we should use protection, enable it. 2461 */ 2462 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2463 ic->ic_nonerpsta == 1 && 2464 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2465 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2466 "%s: enable use of protection\n", __func__); 2467 ic->ic_flags |= IEEE80211_F_USEPROT; 2468 ieee80211_notify_erp_locked(ic); 2469 } 2470 } else 2471 ni->ni_flags |= IEEE80211_NODE_ERP; 2472} 2473 2474void 2475ieee80211_node_join(struct ieee80211_node *ni, int resp) 2476{ 2477 struct ieee80211com *ic = ni->ni_ic; 2478 struct ieee80211vap *vap = ni->ni_vap; 2479 int newassoc; 2480 2481 if (ni->ni_associd == 0) { 2482 uint16_t aid; 2483 2484 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2485 /* 2486 * It would be good to search the bitmap 2487 * more efficiently, but this will do for now. 2488 */ 2489 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2490 if (!IEEE80211_AID_ISSET(vap, aid)) 2491 break; 2492 } 2493 if (aid >= vap->iv_max_aid) { 2494 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2495 ieee80211_node_leave(ni); 2496 return; 2497 } 2498 ni->ni_associd = aid | 0xc000; 2499 ni->ni_jointime = time_uptime; 2500 IEEE80211_LOCK(ic); 2501 IEEE80211_AID_SET(vap, ni->ni_associd); 2502 vap->iv_sta_assoc++; 2503 ic->ic_sta_assoc++; 2504 2505 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2506 ieee80211_ht_node_join(ni); 2507 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2508 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2509 ieee80211_node_join_11g(ni); 2510 IEEE80211_UNLOCK(ic); 2511 2512 newassoc = 1; 2513 } else 2514 newassoc = 0; 2515 2516 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2517 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2518 IEEE80211_NODE_AID(ni), 2519 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2520 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2521 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2522 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2523 ni->ni_flags & IEEE80211_NODE_HT ? 2524 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2525 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2526 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2527 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2528 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2529 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2530 ", fast-frames" : "", 2531 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2532 ", turbo" : "" 2533 ); 2534 2535 ieee80211_node_setuptxparms(ni); 2536 ieee80211_ratectl_node_init(ni); 2537 /* give driver a chance to setup state like ni_txrate */ 2538 if (ic->ic_newassoc != NULL) 2539 ic->ic_newassoc(ni, newassoc); 2540 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2541 /* tell the authenticator about new station */ 2542 if (vap->iv_auth->ia_node_join != NULL) 2543 vap->iv_auth->ia_node_join(ni); 2544 ieee80211_notify_node_join(ni, 2545 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2546} 2547 2548static void 2549disable_protection(struct ieee80211com *ic) 2550{ 2551 KASSERT(ic->ic_nonerpsta == 0 && 2552 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2553 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2554 ic->ic_flags_ext)); 2555 2556 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2557 /* XXX verify mode? */ 2558 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2559 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2560 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2561 } 2562 ieee80211_notify_erp_locked(ic); 2563} 2564 2565/* 2566 * Handle a station leaving an 11g network. 2567 */ 2568static void 2569ieee80211_node_leave_11g(struct ieee80211_node *ni) 2570{ 2571 struct ieee80211com *ic = ni->ni_ic; 2572 2573 IEEE80211_LOCK_ASSERT(ic); 2574 2575 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2576 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2577 ic->ic_bsschan->ic_flags)); 2578 2579 /* 2580 * If a long slot station do the slot time bookkeeping. 2581 */ 2582 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2583 KASSERT(ic->ic_longslotsta > 0, 2584 ("bogus long slot station count %d", ic->ic_longslotsta)); 2585 ic->ic_longslotsta--; 2586 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2587 "long slot time station leaves, count now %d", 2588 ic->ic_longslotsta); 2589 if (ic->ic_longslotsta == 0) { 2590 /* 2591 * Re-enable use of short slot time if supported 2592 * and not operating in IBSS mode (per spec). 2593 */ 2594 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2595 ic->ic_opmode != IEEE80211_M_IBSS) { 2596 IEEE80211_DPRINTF(ni->ni_vap, 2597 IEEE80211_MSG_ASSOC, 2598 "%s: re-enable use of short slot time\n", 2599 __func__); 2600 ieee80211_set_shortslottime(ic, 1); 2601 } 2602 } 2603 } 2604 /* 2605 * If a non-ERP station do the protection-related bookkeeping. 2606 */ 2607 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2608 KASSERT(ic->ic_nonerpsta > 0, 2609 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2610 ic->ic_nonerpsta--; 2611 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2612 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2613 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2614 " (non-ERP sta present)" : ""); 2615 if (ic->ic_nonerpsta == 0 && 2616 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2617 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2618 "%s: disable use of protection\n", __func__); 2619 disable_protection(ic); 2620 } 2621 } 2622} 2623 2624/* 2625 * Time out presence of an overlapping bss with non-ERP 2626 * stations. When operating in hostap mode we listen for 2627 * beacons from other stations and if we identify a non-ERP 2628 * station is present we enable protection. To identify 2629 * when all non-ERP stations are gone we time out this 2630 * condition. 2631 */ 2632static void 2633ieee80211_erp_timeout(struct ieee80211com *ic) 2634{ 2635 2636 IEEE80211_LOCK_ASSERT(ic); 2637 2638 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2639 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2640#if 0 2641 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2642 "%s", "age out non-ERP sta present on channel"); 2643#endif 2644 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2645 if (ic->ic_nonerpsta == 0) 2646 disable_protection(ic); 2647 } 2648} 2649 2650/* 2651 * Handle bookkeeping for station deauthentication/disassociation 2652 * when operating as an ap. 2653 */ 2654void 2655ieee80211_node_leave(struct ieee80211_node *ni) 2656{ 2657 struct ieee80211com *ic = ni->ni_ic; 2658 struct ieee80211vap *vap = ni->ni_vap; 2659 struct ieee80211_node_table *nt = ni->ni_table; 2660 2661 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2662 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2663 2664 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2665 ("unexpected operating mode %u", vap->iv_opmode)); 2666 /* 2667 * If node wasn't previously associated all 2668 * we need to do is reclaim the reference. 2669 */ 2670 /* XXX ibss mode bypasses 11g and notification */ 2671 if (ni->ni_associd == 0) 2672 goto done; 2673 /* 2674 * Tell the authenticator the station is leaving. 2675 * Note that we must do this before yanking the 2676 * association id as the authenticator uses the 2677 * associd to locate it's state block. 2678 */ 2679 if (vap->iv_auth->ia_node_leave != NULL) 2680 vap->iv_auth->ia_node_leave(ni); 2681 2682 IEEE80211_LOCK(ic); 2683 IEEE80211_AID_CLR(vap, ni->ni_associd); 2684 ni->ni_associd = 0; 2685 vap->iv_sta_assoc--; 2686 ic->ic_sta_assoc--; 2687 2688 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2689 ieee80211_ht_node_leave(ni); 2690 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2691 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2692 ieee80211_node_leave_11g(ni); 2693 IEEE80211_UNLOCK(ic); 2694 /* 2695 * Cleanup station state. In particular clear various 2696 * state that might otherwise be reused if the node 2697 * is reused before the reference count goes to zero 2698 * (and memory is reclaimed). 2699 */ 2700 ieee80211_sta_leave(ni); 2701done: 2702 /* 2703 * Remove the node from any table it's recorded in and 2704 * drop the caller's reference. Removal from the table 2705 * is important to insure the node is not reprocessed 2706 * for inactivity. 2707 */ 2708 if (nt != NULL) { 2709 IEEE80211_NODE_LOCK(nt); 2710 node_reclaim(nt, ni); 2711 IEEE80211_NODE_UNLOCK(nt); 2712 } else 2713 ieee80211_free_node(ni); 2714} 2715 2716struct rssiinfo { 2717 struct ieee80211vap *vap; 2718 int rssi_samples; 2719 uint32_t rssi_total; 2720}; 2721 2722static void 2723get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2724{ 2725 struct rssiinfo *info = arg; 2726 struct ieee80211vap *vap = ni->ni_vap; 2727 int8_t rssi; 2728 2729 if (info->vap != vap) 2730 return; 2731 /* only associated stations */ 2732 if (ni->ni_associd == 0) 2733 return; 2734 rssi = vap->iv_ic->ic_node_getrssi(ni); 2735 if (rssi != 0) { 2736 info->rssi_samples++; 2737 info->rssi_total += rssi; 2738 } 2739} 2740 2741static void 2742get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2743{ 2744 struct rssiinfo *info = arg; 2745 struct ieee80211vap *vap = ni->ni_vap; 2746 int8_t rssi; 2747 2748 if (info->vap != vap) 2749 return; 2750 /* only neighbors */ 2751 /* XXX check bssid */ 2752 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2753 return; 2754 rssi = vap->iv_ic->ic_node_getrssi(ni); 2755 if (rssi != 0) { 2756 info->rssi_samples++; 2757 info->rssi_total += rssi; 2758 } 2759} 2760 2761#ifdef IEEE80211_SUPPORT_MESH 2762static void 2763get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2764{ 2765 struct rssiinfo *info = arg; 2766 struct ieee80211vap *vap = ni->ni_vap; 2767 int8_t rssi; 2768 2769 if (info->vap != vap) 2770 return; 2771 /* only neighbors that peered successfully */ 2772 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 2773 return; 2774 rssi = vap->iv_ic->ic_node_getrssi(ni); 2775 if (rssi != 0) { 2776 info->rssi_samples++; 2777 info->rssi_total += rssi; 2778 } 2779} 2780#endif /* IEEE80211_SUPPORT_MESH */ 2781 2782int8_t 2783ieee80211_getrssi(struct ieee80211vap *vap) 2784{ 2785#define NZ(x) ((x) == 0 ? 1 : (x)) 2786 struct ieee80211com *ic = vap->iv_ic; 2787 struct rssiinfo info; 2788 2789 info.rssi_total = 0; 2790 info.rssi_samples = 0; 2791 info.vap = vap; 2792 switch (vap->iv_opmode) { 2793 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2794 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2795 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2796 break; 2797 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2798 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2799 break; 2800#ifdef IEEE80211_SUPPORT_MESH 2801 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 2802 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info); 2803 break; 2804#endif 2805 case IEEE80211_M_MONITOR: /* XXX */ 2806 case IEEE80211_M_STA: /* use stats from associated ap */ 2807 default: 2808 if (vap->iv_bss != NULL) 2809 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2810 info.rssi_samples = 1; 2811 break; 2812 } 2813 return info.rssi_total / NZ(info.rssi_samples); 2814#undef NZ 2815} 2816 2817void 2818ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2819{ 2820 2821 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2822 return; 2823 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2824 /* for non-station mode return avg'd rssi accounting */ 2825 if (vap->iv_opmode != IEEE80211_M_STA) 2826 *rssi = ieee80211_getrssi(vap); 2827} 2828