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_media.h> 42 #include <net/ethernet.h> 43 44 #include <net80211/ieee80211_var.h> 45 #include <net80211/ieee80211_input.h> 46 #ifdef IEEE80211_SUPPORT_SUPERG 47 #include <net80211/ieee80211_superg.h> 48 #endif 49 #ifdef IEEE80211_SUPPORT_TDMA 50 #include <net80211/ieee80211_tdma.h> 51 #endif 52 #include <net80211/ieee80211_wds.h> 53 #include <net80211/ieee80211_mesh.h> 54 #include <net80211/ieee80211_ratectl.h> 55 56 #include <net/bpf.h> 57 58 /* 59 * IEEE80211_NODE_HASHSIZE must be a power of 2. 60 */ 61 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 62 63 /* 64 * Association id's are managed with a bit vector. 65 */ 66 #define IEEE80211_AID_SET(_vap, b) \ 67 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 68 (1 << (IEEE80211_AID(b) % 32))) 69 #define IEEE80211_AID_CLR(_vap, b) \ 70 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 71 ~(1 << (IEEE80211_AID(b) % 32))) 72 #define IEEE80211_AID_ISSET(_vap, b) \ 73 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 74 75 #ifdef IEEE80211_DEBUG_REFCNT 76 #define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line 77 #else 78 #define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__ 79 #endif 80 81 static int ieee80211_sta_join1(struct ieee80211_node *); 82 83 static struct ieee80211_node *node_alloc(struct ieee80211vap *, 84 const uint8_t [IEEE80211_ADDR_LEN]); 85 static void node_cleanup(struct ieee80211_node *); 86 static void node_free(struct ieee80211_node *); 87 static void node_age(struct ieee80211_node *); 88 static int8_t node_getrssi(const struct ieee80211_node *); 89 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 90 static void node_getmimoinfo(const struct ieee80211_node *, 91 struct ieee80211_mimo_info *); 92 93 static void _ieee80211_free_node(struct ieee80211_node *); 94 95 static void ieee80211_node_table_init(struct ieee80211com *ic, 96 struct ieee80211_node_table *nt, const char *name, 97 int inact, int keymaxix); 98 static void ieee80211_node_table_reset(struct ieee80211_node_table *, 99 struct ieee80211vap *); 100 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 101 static void ieee80211_erp_timeout(struct ieee80211com *); 102 103 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 104 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 105 106 void 107 ieee80211_node_attach(struct ieee80211com *ic) 108 { 109 /* XXX really want maxlen enforced per-sta */ 110 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 111 "802.11 staging q"); 112 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 113 IEEE80211_INACT_INIT, ic->ic_max_keyix); 114 callout_init(&ic->ic_inact, CALLOUT_MPSAFE); 115 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 116 ieee80211_node_timeout, ic); 117 118 ic->ic_node_alloc = node_alloc; 119 ic->ic_node_free = node_free; 120 ic->ic_node_cleanup = node_cleanup; 121 ic->ic_node_age = node_age; 122 ic->ic_node_drain = node_age; /* NB: same as age */ 123 ic->ic_node_getrssi = node_getrssi; 124 ic->ic_node_getsignal = node_getsignal; 125 ic->ic_node_getmimoinfo = node_getmimoinfo; 126 127 /* 128 * Set flags to be propagated to all vap's; 129 * these define default behaviour/configuration. 130 */ 131 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 132 } 133 134 void 135 ieee80211_node_detach(struct ieee80211com *ic) 136 { 137 138 callout_drain(&ic->ic_inact); 139 ieee80211_node_table_cleanup(&ic->ic_sta); 140 ieee80211_ageq_cleanup(&ic->ic_stageq); 141 } 142 143 void 144 ieee80211_node_vattach(struct ieee80211vap *vap) 145 { 146 /* NB: driver can override */ 147 vap->iv_max_aid = IEEE80211_AID_DEF; 148 149 /* default station inactivity timer setings */ 150 vap->iv_inact_init = IEEE80211_INACT_INIT; 151 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 152 vap->iv_inact_run = IEEE80211_INACT_RUN; 153 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 154 155 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 156 "%s: init %u auth %u run %u probe %u\n", __func__, 157 vap->iv_inact_init, vap->iv_inact_auth, 158 vap->iv_inact_run, vap->iv_inact_probe); 159 } 160 161 void 162 ieee80211_node_latevattach(struct ieee80211vap *vap) 163 { 164 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 165 /* XXX should we allow max aid to be zero? */ 166 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 167 vap->iv_max_aid = IEEE80211_AID_MIN; 168 if_printf(vap->iv_ifp, 169 "WARNING: max aid too small, changed to %d\n", 170 vap->iv_max_aid); 171 } 172 vap->iv_aid_bitmap = (uint32_t *) malloc( 173 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 174 M_80211_NODE, M_NOWAIT | M_ZERO); 175 if (vap->iv_aid_bitmap == NULL) { 176 /* XXX no way to recover */ 177 printf("%s: no memory for AID bitmap, max aid %d!\n", 178 __func__, vap->iv_max_aid); 179 vap->iv_max_aid = 0; 180 } 181 } 182 183 ieee80211_reset_bss(vap); 184 185 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 186 } 187 188 void 189 ieee80211_node_vdetach(struct ieee80211vap *vap) 190 { 191 struct ieee80211com *ic = vap->iv_ic; 192 193 ieee80211_node_table_reset(&ic->ic_sta, vap); 194 if (vap->iv_bss != NULL) { 195 ieee80211_free_node(vap->iv_bss); 196 vap->iv_bss = NULL; 197 } 198 if (vap->iv_aid_bitmap != NULL) { 199 free(vap->iv_aid_bitmap, M_80211_NODE); 200 vap->iv_aid_bitmap = NULL; 201 } 202 } 203 204 /* 205 * Port authorize/unauthorize interfaces for use by an authenticator. 206 */ 207 208 void 209 ieee80211_node_authorize(struct ieee80211_node *ni) 210 { 211 struct ieee80211vap *vap = ni->ni_vap; 212 213 ni->ni_flags |= IEEE80211_NODE_AUTH; 214 ni->ni_inact_reload = vap->iv_inact_run; 215 ni->ni_inact = ni->ni_inact_reload; 216 217 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 218 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 219 } 220 221 void 222 ieee80211_node_unauthorize(struct ieee80211_node *ni) 223 { 224 struct ieee80211vap *vap = ni->ni_vap; 225 226 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 227 ni->ni_inact_reload = vap->iv_inact_auth; 228 if (ni->ni_inact > ni->ni_inact_reload) 229 ni->ni_inact = ni->ni_inact_reload; 230 231 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 232 "%s: inact_reload %u inact %u", __func__, 233 ni->ni_inact_reload, ni->ni_inact); 234 } 235 236 /* 237 * Fix tx parameters for a node according to ``association state''. 238 */ 239 void 240 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 241 { 242 struct ieee80211vap *vap = ni->ni_vap; 243 enum ieee80211_phymode mode; 244 245 if (ni->ni_flags & IEEE80211_NODE_HT) { 246 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 247 mode = IEEE80211_MODE_11NA; 248 else 249 mode = IEEE80211_MODE_11NG; 250 } else { /* legacy rate handling */ 251 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 252 mode = IEEE80211_MODE_STURBO_A; 253 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 254 mode = IEEE80211_MODE_HALF; 255 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 256 mode = IEEE80211_MODE_QUARTER; 257 /* NB: 108A should be handled as 11a */ 258 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 259 mode = IEEE80211_MODE_11A; 260 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 261 (ni->ni_flags & IEEE80211_NODE_ERP)) 262 mode = IEEE80211_MODE_11G; 263 else 264 mode = IEEE80211_MODE_11B; 265 } 266 ni->ni_txparms = &vap->iv_txparms[mode]; 267 } 268 269 /* 270 * Set/change the channel. The rate set is also updated as 271 * to insure a consistent view by drivers. 272 * XXX should be private but hostap needs it to deal with CSA 273 */ 274 void 275 ieee80211_node_set_chan(struct ieee80211_node *ni, 276 struct ieee80211_channel *chan) 277 { 278 struct ieee80211com *ic = ni->ni_ic; 279 struct ieee80211vap *vap = ni->ni_vap; 280 enum ieee80211_phymode mode; 281 282 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 283 284 ni->ni_chan = chan; 285 mode = ieee80211_chan2mode(chan); 286 if (IEEE80211_IS_CHAN_HT(chan)) { 287 /* 288 * XXX Gotta be careful here; the rate set returned by 289 * ieee80211_get_suprates is actually any HT rate 290 * set so blindly copying it will be bad. We must 291 * 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 } 313 314 static __inline void 315 copy_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 } 324 325 void 326 ieee80211_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 */ 424 void 425 ieee80211_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 } 445 446 static int 447 match_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 */ 463 static int 464 check_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 */ 503 static void 504 check_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 */ 570 int 571 ieee80211_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 */ 608 static int 609 gethtadjustflags(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 */ 640 void 641 ieee80211_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 */ 661 void 662 ieee80211_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 */ 684 void 685 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 686 { 687 ieee80211_setupcurchan(ic, c); 688 ieee80211_runtask(ic, &ic->ic_chan_task); 689 } 690 691 /* 692 * Join the specified IBSS/BSS network. The node is assumed to 693 * be passed in with a held reference. 694 */ 695 static int 696 ieee80211_sta_join1(struct ieee80211_node *selbs) 697 { 698 struct ieee80211vap *vap = selbs->ni_vap; 699 struct ieee80211com *ic = selbs->ni_ic; 700 struct ieee80211_node *obss; 701 int canreassoc; 702 703 /* 704 * Committed to selbs, setup state. 705 */ 706 obss = vap->iv_bss; 707 /* 708 * Check if old+new node have the same address in which 709 * case we can reassociate when operating in sta mode. 710 */ 711 canreassoc = (obss != NULL && 712 vap->iv_state == IEEE80211_S_RUN && 713 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 714 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 715 if (obss != NULL) { 716 copy_bss(selbs, obss); 717 ieee80211_node_decref(obss); /* iv_bss reference */ 718 ieee80211_free_node(obss); /* station table reference */ 719 obss = NULL; /* NB: guard against later use */ 720 } 721 722 /* 723 * Delete unusable rates; we've already checked 724 * that the negotiated rate set is acceptable. 725 */ 726 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 727 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 728 729 ieee80211_setcurchan(ic, selbs->ni_chan); 730 /* 731 * Set the erp state (mostly the slot time) to deal with 732 * the auto-select case; this should be redundant if the 733 * mode is locked. 734 */ 735 ieee80211_reset_erp(ic); 736 ieee80211_wme_initparams(vap); 737 738 if (vap->iv_opmode == IEEE80211_M_STA) { 739 if (canreassoc) { 740 /* Reassociate */ 741 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 742 } else { 743 /* 744 * Act as if we received a DEAUTH frame in case we 745 * are invoked from the RUN state. This will cause 746 * us to try to re-authenticate if we are operating 747 * as a station. 748 */ 749 ieee80211_new_state(vap, IEEE80211_S_AUTH, 750 IEEE80211_FC0_SUBTYPE_DEAUTH); 751 } 752 } else 753 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 754 return 1; 755 } 756 757 int 758 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 759 const struct ieee80211_scan_entry *se) 760 { 761 struct ieee80211com *ic = vap->iv_ic; 762 struct ieee80211_node *ni; 763 764 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 765 if (ni == NULL) { 766 /* XXX msg */ 767 return 0; 768 } 769 /* 770 * Expand scan state into node's format. 771 * XXX may not need all this stuff 772 */ 773 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 774 ni->ni_esslen = se->se_ssid[1]; 775 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 776 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 777 ni->ni_intval = se->se_intval; 778 ni->ni_capinfo = se->se_capinfo; 779 ni->ni_chan = chan; 780 ni->ni_timoff = se->se_timoff; 781 ni->ni_fhdwell = se->se_fhdwell; 782 ni->ni_fhindex = se->se_fhindex; 783 ni->ni_erp = se->se_erp; 784 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 785 ni->ni_noise = se->se_noise; 786 if (vap->iv_opmode == IEEE80211_M_STA) { 787 /* NB: only infrastructure mode requires an associd */ 788 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 789 } 790 791 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 792 ieee80211_ies_expand(&ni->ni_ies); 793 #ifdef IEEE80211_SUPPORT_SUPERG 794 if (ni->ni_ies.ath_ie != NULL) 795 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 796 #endif 797 if (ni->ni_ies.htcap_ie != NULL) 798 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 799 if (ni->ni_ies.htinfo_ie != NULL) 800 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 801 #ifdef IEEE80211_SUPPORT_MESH 802 if (ni->ni_ies.meshid_ie != NULL) 803 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 804 #endif 805 #ifdef IEEE80211_SUPPORT_TDMA 806 if (ni->ni_ies.tdma_ie != NULL) 807 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 808 #endif 809 } 810 811 vap->iv_dtim_period = se->se_dtimperiod; 812 vap->iv_dtim_count = 0; 813 814 /* NB: must be after ni_chan is setup */ 815 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 816 IEEE80211_F_DOSORT); 817 if (ieee80211_iserp_rateset(&ni->ni_rates)) 818 ni->ni_flags |= IEEE80211_NODE_ERP; 819 ieee80211_node_setuptxparms(ni); 820 821 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 822 } 823 824 /* 825 * Leave the specified IBSS/BSS network. The node is assumed to 826 * be passed in with a held reference. 827 */ 828 void 829 ieee80211_sta_leave(struct ieee80211_node *ni) 830 { 831 struct ieee80211com *ic = ni->ni_ic; 832 833 ic->ic_node_cleanup(ni); 834 ieee80211_notify_node_leave(ni); 835 } 836 837 /* 838 * Send a deauthenticate frame and drop the station. 839 */ 840 void 841 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 842 { 843 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */ 844 ieee80211_ref_node(ni); 845 if (ni->ni_associd != 0) 846 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 847 ieee80211_node_leave(ni); 848 ieee80211_free_node(ni); 849 } 850 851 static struct ieee80211_node * 852 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 853 { 854 struct ieee80211_node *ni; 855 856 ni = (struct ieee80211_node *) malloc(sizeof(struct ieee80211_node), 857 M_80211_NODE, M_NOWAIT | M_ZERO); 858 return ni; 859 } 860 861 /* 862 * Initialize an ie blob with the specified data. If previous 863 * data exists re-use the data block. As a side effect we clear 864 * all references to specific ie's; the caller is required to 865 * recalculate them. 866 */ 867 int 868 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 869 { 870 /* NB: assumes data+len are the last fields */ 871 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 872 if (ies->data != NULL && ies->len != len) { 873 /* data size changed */ 874 free(ies->data, M_80211_NODE_IE); 875 ies->data = NULL; 876 } 877 if (ies->data == NULL) { 878 ies->data = (uint8_t *) malloc(len, M_80211_NODE_IE, M_NOWAIT); 879 if (ies->data == NULL) { 880 ies->len = 0; 881 /* NB: pointers have already been zero'd above */ 882 return 0; 883 } 884 } 885 memcpy(ies->data, data, len); 886 ies->len = len; 887 return 1; 888 } 889 890 /* 891 * Reclaim storage for an ie blob. 892 */ 893 void 894 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 895 { 896 if (ies->data != NULL) 897 free(ies->data, M_80211_NODE_IE); 898 } 899 900 /* 901 * Expand an ie blob data contents and to fillin individual 902 * ie pointers. The data blob is assumed to be well-formed; 903 * we don't do any validity checking of ie lengths. 904 */ 905 void 906 ieee80211_ies_expand(struct ieee80211_ies *ies) 907 { 908 uint8_t *ie; 909 int ielen; 910 911 ie = ies->data; 912 ielen = ies->len; 913 while (ielen > 0) { 914 switch (ie[0]) { 915 case IEEE80211_ELEMID_VENDOR: 916 if (iswpaoui(ie)) 917 ies->wpa_ie = ie; 918 else if (iswmeoui(ie)) 919 ies->wme_ie = ie; 920 #ifdef IEEE80211_SUPPORT_SUPERG 921 else if (isatherosoui(ie)) 922 ies->ath_ie = ie; 923 #endif 924 #ifdef IEEE80211_SUPPORT_TDMA 925 else if (istdmaoui(ie)) 926 ies->tdma_ie = ie; 927 #endif 928 break; 929 case IEEE80211_ELEMID_RSN: 930 ies->rsn_ie = ie; 931 break; 932 case IEEE80211_ELEMID_HTCAP: 933 ies->htcap_ie = ie; 934 break; 935 #ifdef IEEE80211_SUPPORT_MESH 936 case IEEE80211_ELEMID_MESHID: 937 ies->meshid_ie = ie; 938 break; 939 #endif 940 } 941 ielen -= 2 + ie[1]; 942 ie += 2 + ie[1]; 943 } 944 } 945 946 /* 947 * Reclaim any resources in a node and reset any critical 948 * state. Typically nodes are free'd immediately after, 949 * but in some cases the storage may be reused so we need 950 * to insure consistent state (should probably fix that). 951 */ 952 static void 953 node_cleanup(struct ieee80211_node *ni) 954 { 955 #define N(a) (sizeof(a)/sizeof(a[0])) 956 struct ieee80211vap *vap = ni->ni_vap; 957 struct ieee80211com *ic = ni->ni_ic; 958 int i; 959 960 /* NB: preserve ni_table */ 961 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 962 if (vap->iv_opmode != IEEE80211_M_STA) 963 vap->iv_ps_sta--; 964 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 965 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 966 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 967 } 968 /* 969 * Cleanup any HT-related state. 970 */ 971 if (ni->ni_flags & IEEE80211_NODE_HT) 972 ieee80211_ht_node_cleanup(ni); 973 #ifdef IEEE80211_SUPPORT_SUPERG 974 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH) 975 ieee80211_ff_node_cleanup(ni); 976 #endif 977 #ifdef IEEE80211_SUPPORT_MESH 978 /* 979 * Cleanup any mesh-related state. 980 */ 981 if (vap->iv_opmode == IEEE80211_M_MBSS) 982 ieee80211_mesh_node_cleanup(ni); 983 #endif 984 /* 985 * Clear any staging queue entries. 986 */ 987 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 988 989 /* 990 * Clear AREF flag that marks the authorization refcnt bump 991 * has happened. This is probably not needed as the node 992 * should always be removed from the table so not found but 993 * do it just in case. 994 * Likewise clear the ASSOCID flag as these flags are intended 995 * to be managed in tandem. 996 */ 997 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 998 999 /* 1000 * Drain power save queue and, if needed, clear TIM. 1001 */ 1002 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1003 vap->iv_set_tim(ni, 0); 1004 1005 ni->ni_associd = 0; 1006 if (ni->ni_challenge != NULL) { 1007 free(ni->ni_challenge, M_80211_NODE); 1008 ni->ni_challenge = NULL; 1009 } 1010 /* 1011 * Preserve SSID, WPA, and WME ie's so the bss node is 1012 * reusable during a re-auth/re-assoc state transition. 1013 * If we remove these data they will not be recreated 1014 * because they come from a probe-response or beacon frame 1015 * which cannot be expected prior to the association-response. 1016 * This should not be an issue when operating in other modes 1017 * as stations leaving always go through a full state transition 1018 * which will rebuild this state. 1019 * 1020 * XXX does this leave us open to inheriting old state? 1021 */ 1022 for (i = 0; i < N(ni->ni_rxfrag); i++) 1023 if (ni->ni_rxfrag[i] != NULL) { 1024 m_freem(ni->ni_rxfrag[i]); 1025 ni->ni_rxfrag[i] = NULL; 1026 } 1027 /* 1028 * Must be careful here to remove any key map entry w/o a LOR. 1029 */ 1030 ieee80211_node_delucastkey(ni); 1031 #undef N 1032 } 1033 1034 static void 1035 node_free(struct ieee80211_node *ni) 1036 { 1037 struct ieee80211com *ic = ni->ni_ic; 1038 1039 ieee80211_ratectl_node_deinit(ni); 1040 ic->ic_node_cleanup(ni); 1041 ieee80211_ies_cleanup(&ni->ni_ies); 1042 ieee80211_psq_cleanup(&ni->ni_psq); 1043 free(ni, M_80211_NODE); 1044 } 1045 1046 static void 1047 node_age(struct ieee80211_node *ni) 1048 { 1049 struct ieee80211vap *vap = ni->ni_vap; 1050 1051 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta); 1052 1053 /* 1054 * Age frames on the power save queue. 1055 */ 1056 if (ieee80211_node_psq_age(ni) != 0 && 1057 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1058 vap->iv_set_tim(ni, 0); 1059 /* 1060 * Age out HT resources (e.g. frames on the 1061 * A-MPDU reorder queues). 1062 */ 1063 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1064 ieee80211_ht_node_age(ni); 1065 } 1066 1067 static int8_t 1068 node_getrssi(const struct ieee80211_node *ni) 1069 { 1070 uint32_t avgrssi = ni->ni_avgrssi; 1071 int32_t rssi; 1072 1073 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1074 return 0; 1075 rssi = IEEE80211_RSSI_GET(avgrssi); 1076 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1077 } 1078 1079 static void 1080 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1081 { 1082 *rssi = node_getrssi(ni); 1083 *noise = ni->ni_noise; 1084 } 1085 1086 static void 1087 node_getmimoinfo(const struct ieee80211_node *ni, 1088 struct ieee80211_mimo_info *info) 1089 { 1090 /* XXX zero data? */ 1091 } 1092 1093 struct ieee80211_node * 1094 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1095 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1096 { 1097 struct ieee80211com *ic = nt->nt_ic; 1098 struct ieee80211_node *ni; 1099 int hash; 1100 1101 ni = ic->ic_node_alloc(vap, macaddr); 1102 if (ni == NULL) { 1103 vap->iv_stats.is_rx_nodealloc++; 1104 return NULL; 1105 } 1106 1107 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1108 "%s %p<%s> in %s table\n", __func__, ni, 1109 ether_sprintf(macaddr), nt->nt_name); 1110 1111 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1112 hash = IEEE80211_NODE_HASH(ic, macaddr); 1113 ieee80211_node_initref(ni); /* mark referenced */ 1114 ni->ni_chan = IEEE80211_CHAN_ANYC; 1115 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1116 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1117 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1118 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1119 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1120 ni->ni_inact_reload = nt->nt_inact_init; 1121 ni->ni_inact = ni->ni_inact_reload; 1122 ni->ni_ath_defkeyix = 0x7fff; 1123 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1124 #ifdef IEEE80211_SUPPORT_MESH 1125 if (vap->iv_opmode == IEEE80211_M_MBSS) 1126 ieee80211_mesh_node_init(vap, ni); 1127 #endif 1128 IEEE80211_NODE_LOCK(nt); 1129 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1130 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1131 ni->ni_table = nt; 1132 ni->ni_vap = vap; 1133 ni->ni_ic = ic; 1134 IEEE80211_NODE_UNLOCK(nt); 1135 1136 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1137 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1138 1139 return ni; 1140 } 1141 1142 /* 1143 * Craft a temporary node suitable for sending a management frame 1144 * to the specified station. We craft only as much state as we 1145 * need to do the work since the node will be immediately reclaimed 1146 * once the send completes. 1147 */ 1148 struct ieee80211_node * 1149 ieee80211_tmp_node(struct ieee80211vap *vap, 1150 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1151 { 1152 struct ieee80211com *ic = vap->iv_ic; 1153 struct ieee80211_node *ni; 1154 1155 ni = ic->ic_node_alloc(vap, macaddr); 1156 if (ni != NULL) { 1157 struct ieee80211_node *bss = vap->iv_bss; 1158 1159 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1160 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1161 1162 ni->ni_table = NULL; /* NB: pedantic */ 1163 ni->ni_ic = ic; /* NB: needed to set channel */ 1164 ni->ni_vap = vap; 1165 1166 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1167 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1168 ieee80211_node_initref(ni); /* mark referenced */ 1169 /* NB: required by ieee80211_fix_rate */ 1170 ieee80211_node_set_chan(ni, bss->ni_chan); 1171 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1172 IEEE80211_KEYIX_NONE); 1173 ni->ni_txpower = bss->ni_txpower; 1174 /* XXX optimize away */ 1175 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1176 } else { 1177 /* XXX msg */ 1178 vap->iv_stats.is_rx_nodealloc++; 1179 } 1180 return ni; 1181 } 1182 1183 struct ieee80211_node * 1184 ieee80211_dup_bss(struct ieee80211vap *vap, 1185 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1186 { 1187 struct ieee80211com *ic = vap->iv_ic; 1188 struct ieee80211_node *ni; 1189 1190 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1191 if (ni != NULL) { 1192 struct ieee80211_node *bss = vap->iv_bss; 1193 /* 1194 * Inherit from iv_bss. 1195 */ 1196 copy_bss(ni, bss); 1197 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1198 ieee80211_node_set_chan(ni, bss->ni_chan); 1199 } 1200 return ni; 1201 } 1202 1203 /* 1204 * Create a bss node for a legacy WDS vap. The far end does 1205 * not associate so we just create create a new node and 1206 * simulate an association. The caller is responsible for 1207 * installing the node as the bss node and handling any further 1208 * setup work like authorizing the port. 1209 */ 1210 struct ieee80211_node * 1211 ieee80211_node_create_wds(struct ieee80211vap *vap, 1212 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1213 { 1214 struct ieee80211com *ic = vap->iv_ic; 1215 struct ieee80211_node *ni; 1216 1217 /* XXX check if node already in sta table? */ 1218 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1219 if (ni != NULL) { 1220 ni->ni_wdsvap = vap; 1221 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1222 /* 1223 * Inherit any manually configured settings. 1224 */ 1225 copy_bss(ni, vap->iv_bss); 1226 ieee80211_node_set_chan(ni, chan); 1227 /* NB: propagate ssid so available to WPA supplicant */ 1228 ni->ni_esslen = vap->iv_des_ssid[0].len; 1229 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1230 /* NB: no associd for peer */ 1231 /* 1232 * There are no management frames to use to 1233 * discover neighbor capabilities, so blindly 1234 * propagate the local configuration. 1235 */ 1236 if (vap->iv_flags & IEEE80211_F_WME) 1237 ni->ni_flags |= IEEE80211_NODE_QOS; 1238 #ifdef IEEE80211_SUPPORT_SUPERG 1239 if (vap->iv_flags & IEEE80211_F_FF) 1240 ni->ni_flags |= IEEE80211_NODE_FF; 1241 #endif 1242 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1243 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1244 /* 1245 * Device is HT-capable and HT is enabled for 1246 * the vap; setup HT operation. On return 1247 * ni_chan will be adjusted to an HT channel. 1248 */ 1249 ieee80211_ht_wds_init(ni); 1250 } else { 1251 struct ieee80211_channel *c = ni->ni_chan; 1252 /* 1253 * Force a legacy channel to be used. 1254 */ 1255 c = ieee80211_find_channel(ic, 1256 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1257 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1258 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1259 ni->ni_chan = c; 1260 } 1261 } 1262 return ni; 1263 } 1264 1265 struct ieee80211_node * 1266 #ifdef IEEE80211_DEBUG_REFCNT 1267 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1268 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1269 #else 1270 ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1271 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1272 #endif 1273 { 1274 struct ieee80211_node *ni; 1275 int hash; 1276 1277 IEEE80211_NODE_LOCK_ASSERT(nt); 1278 1279 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1280 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1281 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1282 ieee80211_ref_node(ni); /* mark referenced */ 1283 #ifdef IEEE80211_DEBUG_REFCNT 1284 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1285 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1286 func, line, 1287 ni, ether_sprintf(ni->ni_macaddr), 1288 ieee80211_node_refcnt(ni)); 1289 #endif 1290 return ni; 1291 } 1292 } 1293 return NULL; 1294 } 1295 1296 struct ieee80211_node * 1297 #ifdef IEEE80211_DEBUG_REFCNT 1298 ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1299 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1300 #else 1301 ieee80211_find_node(struct ieee80211_node_table *nt, 1302 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1303 #endif 1304 { 1305 struct ieee80211_node *ni; 1306 1307 IEEE80211_NODE_LOCK(nt); 1308 ni = ieee80211_find_node_locked(nt, macaddr); 1309 IEEE80211_NODE_UNLOCK(nt); 1310 return ni; 1311 } 1312 1313 struct ieee80211_node * 1314 #ifdef IEEE80211_DEBUG_REFCNT 1315 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1316 const struct ieee80211vap *vap, 1317 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1318 #else 1319 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1320 const struct ieee80211vap *vap, 1321 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1322 #endif 1323 { 1324 struct ieee80211_node *ni; 1325 int hash; 1326 1327 IEEE80211_NODE_LOCK_ASSERT(nt); 1328 1329 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1330 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1331 if (ni->ni_vap == vap && 1332 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1333 ieee80211_ref_node(ni); /* mark referenced */ 1334 #ifdef IEEE80211_DEBUG_REFCNT 1335 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1336 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1337 func, line, 1338 ni, ether_sprintf(ni->ni_macaddr), 1339 ieee80211_node_refcnt(ni)); 1340 #endif 1341 return ni; 1342 } 1343 } 1344 return NULL; 1345 } 1346 1347 struct ieee80211_node * 1348 #ifdef IEEE80211_DEBUG_REFCNT 1349 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1350 const struct ieee80211vap *vap, 1351 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1352 #else 1353 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1354 const struct ieee80211vap *vap, 1355 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1356 #endif 1357 { 1358 struct ieee80211_node *ni; 1359 1360 IEEE80211_NODE_LOCK(nt); 1361 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1362 IEEE80211_NODE_UNLOCK(nt); 1363 return ni; 1364 } 1365 1366 /* 1367 * Fake up a node; this handles node discovery in adhoc mode. 1368 * Note that for the driver's benefit we we treat this like 1369 * an association so the driver has an opportunity to setup 1370 * it's private state. 1371 */ 1372 struct ieee80211_node * 1373 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1374 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1375 { 1376 struct ieee80211_node *ni; 1377 1378 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1379 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1380 ni = ieee80211_dup_bss(vap, macaddr); 1381 if (ni != NULL) { 1382 struct ieee80211com *ic = vap->iv_ic; 1383 1384 /* XXX no rate negotiation; just dup */ 1385 ni->ni_rates = vap->iv_bss->ni_rates; 1386 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1387 ni->ni_flags |= IEEE80211_NODE_ERP; 1388 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1389 /* 1390 * In adhoc demo mode there are no management 1391 * frames to use to discover neighbor capabilities, 1392 * so blindly propagate the local configuration 1393 * so we can do interesting things (e.g. use 1394 * WME to disable ACK's). 1395 */ 1396 if (vap->iv_flags & IEEE80211_F_WME) 1397 ni->ni_flags |= IEEE80211_NODE_QOS; 1398 #ifdef IEEE80211_SUPPORT_SUPERG 1399 if (vap->iv_flags & IEEE80211_F_FF) 1400 ni->ni_flags |= IEEE80211_NODE_FF; 1401 #endif 1402 } 1403 ieee80211_node_setuptxparms(ni); 1404 if (ic->ic_newassoc != NULL) 1405 ic->ic_newassoc(ni, 1); 1406 /* XXX not right for 802.1x/WPA */ 1407 ieee80211_node_authorize(ni); 1408 } 1409 return ni; 1410 } 1411 1412 void 1413 ieee80211_init_neighbor(struct ieee80211_node *ni, 1414 const struct ieee80211_frame *wh, 1415 const struct ieee80211_scanparams *sp) 1416 { 1417 ni->ni_esslen = sp->ssid[1]; 1418 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1419 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1420 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1421 ni->ni_intval = sp->bintval; 1422 ni->ni_capinfo = sp->capinfo; 1423 ni->ni_chan = ni->ni_ic->ic_curchan; 1424 ni->ni_fhdwell = sp->fhdwell; 1425 ni->ni_fhindex = sp->fhindex; 1426 ni->ni_erp = sp->erp; 1427 ni->ni_timoff = sp->timoff; 1428 #ifdef IEEE80211_SUPPORT_MESH 1429 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1430 ieee80211_mesh_init_neighbor(ni, wh, sp); 1431 #endif 1432 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1433 ieee80211_ies_expand(&ni->ni_ies); 1434 if (ni->ni_ies.wme_ie != NULL) 1435 ni->ni_flags |= IEEE80211_NODE_QOS; 1436 else 1437 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1438 #ifdef IEEE80211_SUPPORT_SUPERG 1439 if (ni->ni_ies.ath_ie != NULL) 1440 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1441 #endif 1442 } 1443 1444 /* NB: must be after ni_chan is setup */ 1445 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1446 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1447 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1448 } 1449 1450 /* 1451 * Do node discovery in adhoc mode on receipt of a beacon 1452 * or probe response frame. Note that for the driver's 1453 * benefit we we treat this like an association so the 1454 * driver has an opportunity to setup it's private state. 1455 */ 1456 struct ieee80211_node * 1457 ieee80211_add_neighbor(struct ieee80211vap *vap, 1458 const struct ieee80211_frame *wh, 1459 const struct ieee80211_scanparams *sp) 1460 { 1461 struct ieee80211_node *ni; 1462 1463 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1464 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1465 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1466 if (ni != NULL) { 1467 struct ieee80211com *ic = vap->iv_ic; 1468 1469 ieee80211_init_neighbor(ni, wh, sp); 1470 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1471 ni->ni_flags |= IEEE80211_NODE_ERP; 1472 ieee80211_node_setuptxparms(ni); 1473 if (ic->ic_newassoc != NULL) 1474 ic->ic_newassoc(ni, 1); 1475 /* XXX not right for 802.1x/WPA */ 1476 ieee80211_node_authorize(ni); 1477 } 1478 return ni; 1479 } 1480 1481 #define IS_PROBEREQ(wh) \ 1482 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1483 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1484 #define IS_BCAST_PROBEREQ(wh) \ 1485 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1486 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1487 1488 static __inline struct ieee80211_node * 1489 _find_rxnode(struct ieee80211_node_table *nt, 1490 const struct ieee80211_frame_min *wh) 1491 { 1492 if (IS_BCAST_PROBEREQ(wh)) 1493 return NULL; /* spam bcast probe req to all vap's */ 1494 return ieee80211_find_node_locked(nt, wh->i_addr2); 1495 } 1496 1497 /* 1498 * Locate the node for sender, track state, and then pass the 1499 * (referenced) node up to the 802.11 layer for its use. Note 1500 * we can return NULL if the sender is not in the table. 1501 */ 1502 struct ieee80211_node * 1503 #ifdef IEEE80211_DEBUG_REFCNT 1504 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1505 const struct ieee80211_frame_min *wh, const char *func, int line) 1506 #else 1507 ieee80211_find_rxnode(struct ieee80211com *ic, 1508 const struct ieee80211_frame_min *wh) 1509 #endif 1510 { 1511 struct ieee80211_node_table *nt; 1512 struct ieee80211_node *ni; 1513 1514 nt = &ic->ic_sta; 1515 IEEE80211_NODE_LOCK(nt); 1516 ni = _find_rxnode(nt, wh); 1517 IEEE80211_NODE_UNLOCK(nt); 1518 1519 return ni; 1520 } 1521 1522 /* 1523 * Like ieee80211_find_rxnode but use the supplied h/w 1524 * key index as a hint to locate the node in the key 1525 * mapping table. If an entry is present at the key 1526 * index we return it; otherwise do a normal lookup and 1527 * update the mapping table if the station has a unicast 1528 * key assigned to it. 1529 */ 1530 struct ieee80211_node * 1531 #ifdef IEEE80211_DEBUG_REFCNT 1532 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1533 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1534 const char *func, int line) 1535 #else 1536 ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1537 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1538 #endif 1539 { 1540 struct ieee80211_node_table *nt; 1541 struct ieee80211_node *ni; 1542 1543 nt = &ic->ic_sta; 1544 IEEE80211_NODE_LOCK(nt); 1545 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1546 ni = nt->nt_keyixmap[keyix]; 1547 else 1548 ni = NULL; 1549 if (ni == NULL) { 1550 ni = _find_rxnode(nt, wh); 1551 if (ni != NULL && nt->nt_keyixmap != NULL) { 1552 /* 1553 * If the station has a unicast key cache slot 1554 * assigned update the key->node mapping table. 1555 */ 1556 keyix = ni->ni_ucastkey.wk_rxkeyix; 1557 /* XXX can keyixmap[keyix] != NULL? */ 1558 if (keyix < nt->nt_keyixmax && 1559 nt->nt_keyixmap[keyix] == NULL) { 1560 IEEE80211_DPRINTF(ni->ni_vap, 1561 IEEE80211_MSG_NODE, 1562 "%s: add key map entry %p<%s> refcnt %d\n", 1563 __func__, ni, ether_sprintf(ni->ni_macaddr), 1564 ieee80211_node_refcnt(ni)+1); 1565 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1566 } 1567 } 1568 } else { 1569 if (IS_BCAST_PROBEREQ(wh)) 1570 ni = NULL; /* spam bcast probe req to all vap's */ 1571 else 1572 ieee80211_ref_node(ni); 1573 } 1574 IEEE80211_NODE_UNLOCK(nt); 1575 1576 return ni; 1577 } 1578 #undef IS_BCAST_PROBEREQ 1579 #undef IS_PROBEREQ 1580 1581 /* 1582 * Return a reference to the appropriate node for sending 1583 * a data frame. This handles node discovery in adhoc networks. 1584 */ 1585 struct ieee80211_node * 1586 #ifdef IEEE80211_DEBUG_REFCNT 1587 ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1588 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1589 const char *func, int line) 1590 #else 1591 ieee80211_find_txnode(struct ieee80211vap *vap, 1592 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1593 #endif 1594 { 1595 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1596 struct ieee80211_node *ni; 1597 1598 /* 1599 * The destination address should be in the node table 1600 * unless this is a multicast/broadcast frame. We can 1601 * also optimize station mode operation, all frames go 1602 * to the bss node. 1603 */ 1604 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1605 IEEE80211_NODE_LOCK(nt); 1606 if (vap->iv_opmode == IEEE80211_M_STA || 1607 vap->iv_opmode == IEEE80211_M_WDS || 1608 IEEE80211_IS_MULTICAST(macaddr)) 1609 ni = ieee80211_ref_node(vap->iv_bss); 1610 else 1611 ni = ieee80211_find_node_locked(nt, macaddr); 1612 IEEE80211_NODE_UNLOCK(nt); 1613 1614 if (ni == NULL) { 1615 if (vap->iv_opmode == IEEE80211_M_IBSS || 1616 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1617 /* 1618 * In adhoc mode cons up a node for the destination. 1619 * Note that we need an additional reference for the 1620 * caller to be consistent with 1621 * ieee80211_find_node_locked. 1622 */ 1623 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1624 if (ni != NULL) 1625 (void) ieee80211_ref_node(ni); 1626 } else { 1627 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1628 "no node, discard frame (%s)", __func__); 1629 vap->iv_stats.is_tx_nonode++; 1630 } 1631 } 1632 return ni; 1633 } 1634 1635 static void 1636 _ieee80211_free_node(struct ieee80211_node *ni) 1637 { 1638 struct ieee80211_node_table *nt = ni->ni_table; 1639 1640 /* 1641 * NB: careful about referencing the vap as it may be 1642 * gone if the last reference was held by a driver. 1643 * We know the com will always be present so it's safe 1644 * to use ni_ic below to reclaim resources. 1645 */ 1646 #if 0 1647 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1648 "%s %p<%s> in %s table\n", __func__, ni, 1649 ether_sprintf(ni->ni_macaddr), 1650 nt != NULL ? nt->nt_name : "<gone>"); 1651 #endif 1652 if (ni->ni_associd != 0) { 1653 struct ieee80211vap *vap = ni->ni_vap; 1654 if (vap->iv_aid_bitmap != NULL) 1655 IEEE80211_AID_CLR(vap, ni->ni_associd); 1656 } 1657 if (nt != NULL) { 1658 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1659 LIST_REMOVE(ni, ni_hash); 1660 } 1661 ni->ni_ic->ic_node_free(ni); 1662 } 1663 1664 void 1665 #ifdef IEEE80211_DEBUG_REFCNT 1666 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1667 #else 1668 ieee80211_free_node(struct ieee80211_node *ni) 1669 #endif 1670 { 1671 struct ieee80211_node_table *nt = ni->ni_table; 1672 1673 #ifdef IEEE80211_DEBUG_REFCNT 1674 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1675 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1676 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1677 #endif 1678 if (nt != NULL) { 1679 IEEE80211_NODE_LOCK(nt); 1680 if (ieee80211_node_dectestref(ni)) { 1681 /* 1682 * Last reference, reclaim state. 1683 */ 1684 _ieee80211_free_node(ni); 1685 } else if (ieee80211_node_refcnt(ni) == 1 && 1686 nt->nt_keyixmap != NULL) { 1687 ieee80211_keyix keyix; 1688 /* 1689 * Check for a last reference in the key mapping table. 1690 */ 1691 keyix = ni->ni_ucastkey.wk_rxkeyix; 1692 if (keyix < nt->nt_keyixmax && 1693 nt->nt_keyixmap[keyix] == ni) { 1694 IEEE80211_DPRINTF(ni->ni_vap, 1695 IEEE80211_MSG_NODE, 1696 "%s: %p<%s> clear key map entry", __func__, 1697 ni, ether_sprintf(ni->ni_macaddr)); 1698 nt->nt_keyixmap[keyix] = NULL; 1699 ieee80211_node_decref(ni); /* XXX needed? */ 1700 _ieee80211_free_node(ni); 1701 } 1702 } 1703 IEEE80211_NODE_UNLOCK(nt); 1704 } else { 1705 if (ieee80211_node_dectestref(ni)) 1706 _ieee80211_free_node(ni); 1707 } 1708 } 1709 1710 /* 1711 * Reclaim a unicast key and clear any key cache state. 1712 */ 1713 int 1714 ieee80211_node_delucastkey(struct ieee80211_node *ni) 1715 { 1716 struct ieee80211com *ic = ni->ni_ic; 1717 struct ieee80211_node_table *nt = &ic->ic_sta; 1718 struct ieee80211_node *nikey; 1719 ieee80211_keyix keyix; 1720 int isowned, status; 1721 1722 /* 1723 * NB: We must beware of LOR here; deleting the key 1724 * can cause the crypto layer to block traffic updates 1725 * which can generate a LOR against the node table lock; 1726 * grab it here and stash the key index for our use below. 1727 * 1728 * Must also beware of recursion on the node table lock. 1729 * When called from node_cleanup we may already have 1730 * the node table lock held. Unfortunately there's no 1731 * way to separate out this path so we must do this 1732 * conditionally. 1733 */ 1734 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1735 if (!isowned) 1736 IEEE80211_NODE_LOCK(nt); 1737 nikey = NULL; 1738 status = 1; /* NB: success */ 1739 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1740 keyix = ni->ni_ucastkey.wk_rxkeyix; 1741 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1742 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1743 nikey = nt->nt_keyixmap[keyix]; 1744 nt->nt_keyixmap[keyix] = NULL; 1745 } 1746 } 1747 if (!isowned) 1748 IEEE80211_NODE_UNLOCK(nt); 1749 1750 if (nikey != NULL) { 1751 KASSERT(nikey == ni, 1752 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1753 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1754 "%s: delete key map entry %p<%s> refcnt %d\n", 1755 __func__, ni, ether_sprintf(ni->ni_macaddr), 1756 ieee80211_node_refcnt(ni)-1); 1757 ieee80211_free_node(ni); 1758 } 1759 return status; 1760 } 1761 1762 /* 1763 * Reclaim a node. If this is the last reference count then 1764 * do the normal free work. Otherwise remove it from the node 1765 * table and mark it gone by clearing the back-reference. 1766 */ 1767 static void 1768 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1769 { 1770 ieee80211_keyix keyix; 1771 1772 IEEE80211_NODE_LOCK_ASSERT(nt); 1773 1774 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1775 "%s: remove %p<%s> from %s table, refcnt %d\n", 1776 __func__, ni, ether_sprintf(ni->ni_macaddr), 1777 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1778 /* 1779 * Clear any entry in the unicast key mapping table. 1780 * We need to do it here so rx lookups don't find it 1781 * in the mapping table even if it's not in the hash 1782 * table. We cannot depend on the mapping table entry 1783 * being cleared because the node may not be free'd. 1784 */ 1785 keyix = ni->ni_ucastkey.wk_rxkeyix; 1786 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1787 nt->nt_keyixmap[keyix] == ni) { 1788 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1789 "%s: %p<%s> clear key map entry %u\n", 1790 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 1791 nt->nt_keyixmap[keyix] = NULL; 1792 ieee80211_node_decref(ni); /* NB: don't need free */ 1793 } 1794 if (!ieee80211_node_dectestref(ni)) { 1795 /* 1796 * Other references are present, just remove the 1797 * node from the table so it cannot be found. When 1798 * the references are dropped storage will be 1799 * reclaimed. 1800 */ 1801 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1802 LIST_REMOVE(ni, ni_hash); 1803 ni->ni_table = NULL; /* clear reference */ 1804 } else 1805 _ieee80211_free_node(ni); 1806 } 1807 1808 /* 1809 * Node table support. 1810 */ 1811 1812 static void 1813 ieee80211_node_table_init(struct ieee80211com *ic, 1814 struct ieee80211_node_table *nt, 1815 const char *name, int inact, int keyixmax) 1816 { 1817 struct ifnet *ifp = ic->ic_ifp; 1818 1819 nt->nt_ic = ic; 1820 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname); 1821 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname); 1822 TAILQ_INIT(&nt->nt_node); 1823 nt->nt_name = name; 1824 nt->nt_scangen = 1; 1825 nt->nt_inact_init = inact; 1826 nt->nt_keyixmax = keyixmax; 1827 if (nt->nt_keyixmax > 0) { 1828 nt->nt_keyixmap = (struct ieee80211_node **) malloc( 1829 keyixmax * sizeof(struct ieee80211_node *), 1830 M_80211_NODE, M_NOWAIT | M_ZERO); 1831 if (nt->nt_keyixmap == NULL) 1832 if_printf(ic->ic_ifp, 1833 "Cannot allocate key index map with %u entries\n", 1834 keyixmax); 1835 } else 1836 nt->nt_keyixmap = NULL; 1837 } 1838 1839 static void 1840 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1841 struct ieee80211vap *match) 1842 { 1843 struct ieee80211_node *ni, *next; 1844 1845 IEEE80211_NODE_LOCK(nt); 1846 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1847 if (match != NULL && ni->ni_vap != match) 1848 continue; 1849 /* XXX can this happen? if so need's work */ 1850 if (ni->ni_associd != 0) { 1851 struct ieee80211vap *vap = ni->ni_vap; 1852 1853 if (vap->iv_auth->ia_node_leave != NULL) 1854 vap->iv_auth->ia_node_leave(ni); 1855 if (vap->iv_aid_bitmap != NULL) 1856 IEEE80211_AID_CLR(vap, ni->ni_associd); 1857 } 1858 ni->ni_wdsvap = NULL; /* clear reference */ 1859 node_reclaim(nt, ni); 1860 } 1861 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1862 /* 1863 * Make a separate pass to clear references to this vap 1864 * held by DWDS entries. They will not be matched above 1865 * because ni_vap will point to the ap vap but we still 1866 * need to clear ni_wdsvap when the WDS vap is destroyed 1867 * and/or reset. 1868 */ 1869 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1870 if (ni->ni_wdsvap == match) 1871 ni->ni_wdsvap = NULL; 1872 } 1873 IEEE80211_NODE_UNLOCK(nt); 1874 } 1875 1876 static void 1877 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1878 { 1879 ieee80211_node_table_reset(nt, NULL); 1880 if (nt->nt_keyixmap != NULL) { 1881 #ifdef DIAGNOSTIC 1882 /* XXX verify all entries are NULL */ 1883 int i; 1884 for (i = 0; i < nt->nt_keyixmax; i++) 1885 if (nt->nt_keyixmap[i] != NULL) 1886 printf("%s: %s[%u] still active\n", __func__, 1887 nt->nt_name, i); 1888 #endif 1889 free(nt->nt_keyixmap, M_80211_NODE); 1890 nt->nt_keyixmap = NULL; 1891 } 1892 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1893 IEEE80211_NODE_LOCK_DESTROY(nt); 1894 } 1895 1896 /* 1897 * Timeout inactive stations and do related housekeeping. 1898 * Note that we cannot hold the node lock while sending a 1899 * frame as this would lead to a LOR. Instead we use a 1900 * generation number to mark nodes that we've scanned and 1901 * drop the lock and restart a scan if we have to time out 1902 * a node. Since we are single-threaded by virtue of 1903 * controlling the inactivity timer we can be sure this will 1904 * process each node only once. 1905 */ 1906 static void 1907 ieee80211_timeout_stations(struct ieee80211com *ic) 1908 { 1909 struct ieee80211_node_table *nt = &ic->ic_sta; 1910 struct ieee80211vap *vap; 1911 struct ieee80211_node *ni; 1912 int gen = 0; 1913 1914 IEEE80211_NODE_ITERATE_LOCK(nt); 1915 gen = ++nt->nt_scangen; 1916 restart: 1917 IEEE80211_NODE_LOCK(nt); 1918 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1919 if (ni->ni_scangen == gen) /* previously handled */ 1920 continue; 1921 ni->ni_scangen = gen; 1922 /* 1923 * Ignore entries for which have yet to receive an 1924 * authentication frame. These are transient and 1925 * will be reclaimed when the last reference to them 1926 * goes away (when frame xmits complete). 1927 */ 1928 vap = ni->ni_vap; 1929 /* 1930 * Only process stations when in RUN state. This 1931 * insures, for example, that we don't timeout an 1932 * inactive station during CAC. Note that CSA state 1933 * is actually handled in ieee80211_node_timeout as 1934 * it applies to more than timeout processing. 1935 */ 1936 if (vap->iv_state != IEEE80211_S_RUN) 1937 continue; 1938 /* XXX can vap be NULL? */ 1939 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 1940 vap->iv_opmode == IEEE80211_M_STA) && 1941 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1942 continue; 1943 /* 1944 * Free fragment if not needed anymore 1945 * (last fragment older than 1s). 1946 * XXX doesn't belong here, move to node_age 1947 */ 1948 if (ni->ni_rxfrag[0] != NULL && 1949 ticks > ni->ni_rxfragstamp + hz) { 1950 m_freem(ni->ni_rxfrag[0]); 1951 ni->ni_rxfrag[0] = NULL; 1952 } 1953 if (ni->ni_inact > 0) { 1954 ni->ni_inact--; 1955 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1956 "%s: inact %u inact_reload %u nrates %u", 1957 __func__, ni->ni_inact, ni->ni_inact_reload, 1958 ni->ni_rates.rs_nrates); 1959 } 1960 /* 1961 * Special case ourself; we may be idle for extended periods 1962 * of time and regardless reclaiming our state is wrong. 1963 * XXX run ic_node_age 1964 */ 1965 if (ni == vap->iv_bss) 1966 continue; 1967 if (ni->ni_associd != 0 || 1968 (vap->iv_opmode == IEEE80211_M_IBSS || 1969 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 1970 /* 1971 * Age/drain resources held by the station. 1972 */ 1973 ic->ic_node_age(ni); 1974 /* 1975 * Probe the station before time it out. We 1976 * send a null data frame which may not be 1977 * universally supported by drivers (need it 1978 * for ps-poll support so it should be...). 1979 * 1980 * XXX don't probe the station unless we've 1981 * received a frame from them (and have 1982 * some idea of the rates they are capable 1983 * of); this will get fixed more properly 1984 * soon with better handling of the rate set. 1985 */ 1986 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1987 (0 < ni->ni_inact && 1988 ni->ni_inact <= vap->iv_inact_probe) && 1989 ni->ni_rates.rs_nrates != 0) { 1990 IEEE80211_NOTE(vap, 1991 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1992 ni, "%s", 1993 "probe station due to inactivity"); 1994 /* 1995 * Grab a reference before unlocking the table 1996 * so the node cannot be reclaimed before we 1997 * send the frame. ieee80211_send_nulldata 1998 * understands we've done this and reclaims the 1999 * ref for us as needed. 2000 */ 2001 ieee80211_ref_node(ni); 2002 IEEE80211_NODE_UNLOCK(nt); 2003 ieee80211_send_nulldata(ni); 2004 /* XXX stat? */ 2005 goto restart; 2006 } 2007 } 2008 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2009 ni->ni_inact <= 0) { 2010 IEEE80211_NOTE(vap, 2011 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2012 "station timed out due to inactivity " 2013 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2014 /* 2015 * Send a deauthenticate frame and drop the station. 2016 * This is somewhat complicated due to reference counts 2017 * and locking. At this point a station will typically 2018 * have a reference count of 1. ieee80211_node_leave 2019 * will do a "free" of the node which will drop the 2020 * reference count. But in the meantime a reference 2021 * wil be held by the deauth frame. The actual reclaim 2022 * of the node will happen either after the tx is 2023 * completed or by ieee80211_node_leave. 2024 * 2025 * Separately we must drop the node lock before sending 2026 * in case the driver takes a lock, as this can result 2027 * in a LOR between the node lock and the driver lock. 2028 */ 2029 ieee80211_ref_node(ni); 2030 IEEE80211_NODE_UNLOCK(nt); 2031 if (ni->ni_associd != 0) { 2032 IEEE80211_SEND_MGMT(ni, 2033 IEEE80211_FC0_SUBTYPE_DEAUTH, 2034 IEEE80211_REASON_AUTH_EXPIRE); 2035 } 2036 ieee80211_node_leave(ni); 2037 ieee80211_free_node(ni); 2038 vap->iv_stats.is_node_timeout++; 2039 goto restart; 2040 } 2041 } 2042 IEEE80211_NODE_UNLOCK(nt); 2043 2044 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2045 } 2046 2047 /* 2048 * Aggressively reclaim resources. This should be used 2049 * only in a critical situation to reclaim mbuf resources. 2050 */ 2051 void 2052 ieee80211_drain(struct ieee80211com *ic) 2053 { 2054 struct ieee80211_node_table *nt = &ic->ic_sta; 2055 struct ieee80211vap *vap; 2056 struct ieee80211_node *ni; 2057 2058 IEEE80211_NODE_LOCK(nt); 2059 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 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 fragments. 2083 * XXX doesn't belong here, move to node_drain 2084 */ 2085 if (ni->ni_rxfrag[0] != NULL) { 2086 m_freem(ni->ni_rxfrag[0]); 2087 ni->ni_rxfrag[0] = NULL; 2088 } 2089 /* 2090 * Drain resources held by the station. 2091 */ 2092 ic->ic_node_drain(ni); 2093 } 2094 IEEE80211_NODE_UNLOCK(nt); 2095 } 2096 2097 /* 2098 * Per-ieee80211com inactivity timer callback. 2099 */ 2100 void 2101 ieee80211_node_timeout(void *arg) 2102 { 2103 struct ieee80211com *ic = arg; 2104 2105 /* 2106 * Defer timeout processing if a channel switch is pending. 2107 * We typically need to be mute so not doing things that 2108 * might generate frames is good to handle in one place. 2109 * Supressing the station timeout processing may extend the 2110 * lifetime of inactive stations (by not decrementing their 2111 * idle counters) but this should be ok unless the CSA is 2112 * active for an unusually long time. 2113 */ 2114 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2115 ieee80211_scan_timeout(ic); 2116 ieee80211_timeout_stations(ic); 2117 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2118 2119 IEEE80211_LOCK(ic); 2120 ieee80211_erp_timeout(ic); 2121 ieee80211_ht_timeout(ic); 2122 IEEE80211_UNLOCK(ic); 2123 } 2124 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2125 ieee80211_node_timeout, ic); 2126 } 2127 2128 void 2129 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2130 ieee80211_iter_func *f, void *arg) 2131 { 2132 struct ieee80211_node *ni; 2133 u_int gen; 2134 2135 IEEE80211_NODE_ITERATE_LOCK(nt); 2136 gen = ++nt->nt_scangen; 2137 restart: 2138 IEEE80211_NODE_LOCK(nt); 2139 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2140 if (ni->ni_scangen != gen) { 2141 ni->ni_scangen = gen; 2142 (void) ieee80211_ref_node(ni); 2143 IEEE80211_NODE_UNLOCK(nt); 2144 (*f)(arg, ni); 2145 ieee80211_free_node(ni); 2146 goto restart; 2147 } 2148 } 2149 IEEE80211_NODE_UNLOCK(nt); 2150 2151 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2152 } 2153 2154 void 2155 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2156 { 2157 printf("0x%p: mac %s refcnt %d\n", ni, 2158 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2159 printf("\tscangen %u authmode %u flags 0x%x\n", 2160 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2161 printf("\tassocid 0x%x txpower %u vlan %u\n", 2162 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2163 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2164 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2165 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2166 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2167 ni->ni_rxfragstamp); 2168 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2169 node_getrssi(ni), ni->ni_noise, 2170 ni->ni_intval, ni->ni_capinfo); 2171 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2172 ether_sprintf(ni->ni_bssid), 2173 ni->ni_esslen, ni->ni_essid, 2174 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2175 printf("\tinact %u inact_reload %u txrate %u\n", 2176 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2177 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2178 ni->ni_htcap, ni->ni_htparam, 2179 ni->ni_htctlchan, ni->ni_ht2ndchan); 2180 printf("\thtopmode %x htstbc %x chw %u\n", 2181 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2182 } 2183 2184 void 2185 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2186 { 2187 ieee80211_iterate_nodes(nt, 2188 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2189 } 2190 2191 static void 2192 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2193 { 2194 struct ieee80211vap *vap; 2195 2196 IEEE80211_LOCK_ASSERT(ic); 2197 2198 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2199 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2200 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2201 } 2202 2203 void 2204 ieee80211_notify_erp(struct ieee80211com *ic) 2205 { 2206 IEEE80211_LOCK(ic); 2207 ieee80211_notify_erp_locked(ic); 2208 IEEE80211_UNLOCK(ic); 2209 } 2210 2211 /* 2212 * Handle a station joining an 11g network. 2213 */ 2214 static void 2215 ieee80211_node_join_11g(struct ieee80211_node *ni) 2216 { 2217 struct ieee80211com *ic = ni->ni_ic; 2218 2219 IEEE80211_LOCK_ASSERT(ic); 2220 2221 /* 2222 * Station isn't capable of short slot time. Bump 2223 * the count of long slot time stations and disable 2224 * use of short slot time. Note that the actual switch 2225 * over to long slot time use may not occur until the 2226 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2227 */ 2228 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2229 ic->ic_longslotsta++; 2230 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2231 "station needs long slot time, count %d", 2232 ic->ic_longslotsta); 2233 /* XXX vap's w/ conflicting needs won't work */ 2234 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2235 /* 2236 * Don't force slot time when switched to turbo 2237 * mode as non-ERP stations won't be present; this 2238 * need only be done when on the normal G channel. 2239 */ 2240 ieee80211_set_shortslottime(ic, 0); 2241 } 2242 } 2243 /* 2244 * If the new station is not an ERP station 2245 * then bump the counter and enable protection 2246 * if configured. 2247 */ 2248 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2249 ic->ic_nonerpsta++; 2250 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2251 "station is !ERP, %d non-ERP stations associated", 2252 ic->ic_nonerpsta); 2253 /* 2254 * If station does not support short preamble 2255 * then we must enable use of Barker preamble. 2256 */ 2257 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2258 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2259 "%s", "station needs long preamble"); 2260 ic->ic_flags |= IEEE80211_F_USEBARKER; 2261 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2262 } 2263 /* 2264 * If protection is configured and this is the first 2265 * indication we should use protection, enable it. 2266 */ 2267 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2268 ic->ic_nonerpsta == 1 && 2269 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2270 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2271 "%s: enable use of protection\n", __func__); 2272 ic->ic_flags |= IEEE80211_F_USEPROT; 2273 ieee80211_notify_erp_locked(ic); 2274 } 2275 } else 2276 ni->ni_flags |= IEEE80211_NODE_ERP; 2277 } 2278 2279 void 2280 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2281 { 2282 struct ieee80211com *ic = ni->ni_ic; 2283 struct ieee80211vap *vap = ni->ni_vap; 2284 int newassoc; 2285 2286 if (ni->ni_associd == 0) { 2287 uint16_t aid; 2288 2289 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2290 /* 2291 * It would be good to search the bitmap 2292 * more efficiently, but this will do for now. 2293 */ 2294 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2295 if (!IEEE80211_AID_ISSET(vap, aid)) 2296 break; 2297 } 2298 if (aid >= vap->iv_max_aid) { 2299 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2300 ieee80211_node_leave(ni); 2301 return; 2302 } 2303 ni->ni_associd = aid | 0xc000; 2304 ni->ni_jointime = time_uptime; 2305 IEEE80211_LOCK(ic); 2306 IEEE80211_AID_SET(vap, ni->ni_associd); 2307 vap->iv_sta_assoc++; 2308 ic->ic_sta_assoc++; 2309 2310 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2311 ieee80211_ht_node_join(ni); 2312 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2313 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2314 ieee80211_node_join_11g(ni); 2315 IEEE80211_UNLOCK(ic); 2316 2317 newassoc = 1; 2318 } else 2319 newassoc = 0; 2320 2321 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2322 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2323 IEEE80211_NODE_AID(ni), 2324 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2325 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2326 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2327 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2328 ni->ni_flags & IEEE80211_NODE_HT ? 2329 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2330 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2331 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2332 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2333 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2334 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2335 ", fast-frames" : "", 2336 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2337 ", turbo" : "" 2338 ); 2339 2340 ieee80211_node_setuptxparms(ni); 2341 /* give driver a chance to setup state like ni_txrate */ 2342 if (ic->ic_newassoc != NULL) 2343 ic->ic_newassoc(ni, newassoc); 2344 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2345 /* tell the authenticator about new station */ 2346 if (vap->iv_auth->ia_node_join != NULL) 2347 vap->iv_auth->ia_node_join(ni); 2348 ieee80211_notify_node_join(ni, 2349 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2350 } 2351 2352 static void 2353 disable_protection(struct ieee80211com *ic) 2354 { 2355 KASSERT(ic->ic_nonerpsta == 0 && 2356 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2357 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2358 ic->ic_flags_ext)); 2359 2360 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2361 /* XXX verify mode? */ 2362 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2363 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2364 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2365 } 2366 ieee80211_notify_erp_locked(ic); 2367 } 2368 2369 /* 2370 * Handle a station leaving an 11g network. 2371 */ 2372 static void 2373 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2374 { 2375 struct ieee80211com *ic = ni->ni_ic; 2376 2377 IEEE80211_LOCK_ASSERT(ic); 2378 2379 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2380 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2381 ic->ic_bsschan->ic_flags)); 2382 2383 /* 2384 * If a long slot station do the slot time bookkeeping. 2385 */ 2386 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2387 KASSERT(ic->ic_longslotsta > 0, 2388 ("bogus long slot station count %d", ic->ic_longslotsta)); 2389 ic->ic_longslotsta--; 2390 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2391 "long slot time station leaves, count now %d", 2392 ic->ic_longslotsta); 2393 if (ic->ic_longslotsta == 0) { 2394 /* 2395 * Re-enable use of short slot time if supported 2396 * and not operating in IBSS mode (per spec). 2397 */ 2398 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2399 ic->ic_opmode != IEEE80211_M_IBSS) { 2400 IEEE80211_DPRINTF(ni->ni_vap, 2401 IEEE80211_MSG_ASSOC, 2402 "%s: re-enable use of short slot time\n", 2403 __func__); 2404 ieee80211_set_shortslottime(ic, 1); 2405 } 2406 } 2407 } 2408 /* 2409 * If a non-ERP station do the protection-related bookkeeping. 2410 */ 2411 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2412 KASSERT(ic->ic_nonerpsta > 0, 2413 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2414 ic->ic_nonerpsta--; 2415 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2416 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2417 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2418 " (non-ERP sta present)" : ""); 2419 if (ic->ic_nonerpsta == 0 && 2420 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2421 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2422 "%s: disable use of protection\n", __func__); 2423 disable_protection(ic); 2424 } 2425 } 2426 } 2427 2428 /* 2429 * Time out presence of an overlapping bss with non-ERP 2430 * stations. When operating in hostap mode we listen for 2431 * beacons from other stations and if we identify a non-ERP 2432 * station is present we enable protection. To identify 2433 * when all non-ERP stations are gone we time out this 2434 * condition. 2435 */ 2436 static void 2437 ieee80211_erp_timeout(struct ieee80211com *ic) 2438 { 2439 2440 IEEE80211_LOCK_ASSERT(ic); 2441 2442 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2443 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2444 #if 0 2445 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2446 "%s", "age out non-ERP sta present on channel"); 2447 #endif 2448 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2449 if (ic->ic_nonerpsta == 0) 2450 disable_protection(ic); 2451 } 2452 } 2453 2454 /* 2455 * Handle bookkeeping for station deauthentication/disassociation 2456 * when operating as an ap. 2457 */ 2458 void 2459 ieee80211_node_leave(struct ieee80211_node *ni) 2460 { 2461 struct ieee80211com *ic = ni->ni_ic; 2462 struct ieee80211vap *vap = ni->ni_vap; 2463 struct ieee80211_node_table *nt = ni->ni_table; 2464 2465 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2466 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2467 2468 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2469 ("unexpected operating mode %u", vap->iv_opmode)); 2470 /* 2471 * If node wasn't previously associated all 2472 * we need to do is reclaim the reference. 2473 */ 2474 /* XXX ibss mode bypasses 11g and notification */ 2475 if (ni->ni_associd == 0) 2476 goto done; 2477 /* 2478 * Tell the authenticator the station is leaving. 2479 * Note that we must do this before yanking the 2480 * association id as the authenticator uses the 2481 * associd to locate it's state block. 2482 */ 2483 if (vap->iv_auth->ia_node_leave != NULL) 2484 vap->iv_auth->ia_node_leave(ni); 2485 2486 IEEE80211_LOCK(ic); 2487 IEEE80211_AID_CLR(vap, ni->ni_associd); 2488 ni->ni_associd = 0; 2489 vap->iv_sta_assoc--; 2490 ic->ic_sta_assoc--; 2491 2492 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2493 ieee80211_ht_node_leave(ni); 2494 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2495 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2496 ieee80211_node_leave_11g(ni); 2497 IEEE80211_UNLOCK(ic); 2498 /* 2499 * Cleanup station state. In particular clear various 2500 * state that might otherwise be reused if the node 2501 * is reused before the reference count goes to zero 2502 * (and memory is reclaimed). 2503 */ 2504 ieee80211_sta_leave(ni); 2505 done: 2506 /* 2507 * Remove the node from any table it's recorded in and 2508 * drop the caller's reference. Removal from the table 2509 * is important to insure the node is not reprocessed 2510 * for inactivity. 2511 */ 2512 if (nt != NULL) { 2513 IEEE80211_NODE_LOCK(nt); 2514 node_reclaim(nt, ni); 2515 IEEE80211_NODE_UNLOCK(nt); 2516 } else 2517 ieee80211_free_node(ni); 2518 } 2519 2520 struct rssiinfo { 2521 struct ieee80211vap *vap; 2522 int rssi_samples; 2523 uint32_t rssi_total; 2524 }; 2525 2526 static void 2527 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2528 { 2529 struct rssiinfo *info = arg; 2530 struct ieee80211vap *vap = ni->ni_vap; 2531 int8_t rssi; 2532 2533 if (info->vap != vap) 2534 return; 2535 /* only associated stations */ 2536 if (ni->ni_associd == 0) 2537 return; 2538 rssi = vap->iv_ic->ic_node_getrssi(ni); 2539 if (rssi != 0) { 2540 info->rssi_samples++; 2541 info->rssi_total += rssi; 2542 } 2543 } 2544 2545 static void 2546 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2547 { 2548 struct rssiinfo *info = arg; 2549 struct ieee80211vap *vap = ni->ni_vap; 2550 int8_t rssi; 2551 2552 if (info->vap != vap) 2553 return; 2554 /* only neighbors */ 2555 /* XXX check bssid */ 2556 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2557 return; 2558 rssi = vap->iv_ic->ic_node_getrssi(ni); 2559 if (rssi != 0) { 2560 info->rssi_samples++; 2561 info->rssi_total += rssi; 2562 } 2563 } 2564 2565 #ifdef IEEE80211_SUPPORT_MESH 2566 static void 2567 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2568 { 2569 struct rssiinfo *info = arg; 2570 struct ieee80211vap *vap = ni->ni_vap; 2571 int8_t rssi; 2572 2573 if (info->vap != vap) 2574 return; 2575 /* only neighbors that peered successfully */ 2576 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 2577 return; 2578 rssi = vap->iv_ic->ic_node_getrssi(ni); 2579 if (rssi != 0) { 2580 info->rssi_samples++; 2581 info->rssi_total += rssi; 2582 } 2583 } 2584 #endif /* IEEE80211_SUPPORT_MESH */ 2585 2586 int8_t 2587 ieee80211_getrssi(struct ieee80211vap *vap) 2588 { 2589 #define NZ(x) ((x) == 0 ? 1 : (x)) 2590 struct ieee80211com *ic = vap->iv_ic; 2591 struct rssiinfo info; 2592 2593 info.rssi_total = 0; 2594 info.rssi_samples = 0; 2595 info.vap = vap; 2596 switch (vap->iv_opmode) { 2597 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2598 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2599 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2600 break; 2601 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2602 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2603 break; 2604 #ifdef IEEE80211_SUPPORT_MESH 2605 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 2606 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info); 2607 break; 2608 #endif 2609 case IEEE80211_M_MONITOR: /* XXX */ 2610 case IEEE80211_M_STA: /* use stats from associated ap */ 2611 default: 2612 if (vap->iv_bss != NULL) 2613 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2614 info.rssi_samples = 1; 2615 break; 2616 } 2617 return info.rssi_total / NZ(info.rssi_samples); 2618 #undef NZ 2619 } 2620 2621 void 2622 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2623 { 2624 2625 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2626 return; 2627 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2628 /* for non-station mode return avg'd rssi accounting */ 2629 if (vap->iv_opmode != IEEE80211_M_STA) 2630 *rssi = ieee80211_getrssi(vap); 2631 } 2632