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 if (vap->iv_caps & IEEE80211_C_RATECTL) 821 ieee80211_ratectl_node_init(ni); 822 823 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 824 } 825 826 /* 827 * Leave the specified IBSS/BSS network. The node is assumed to 828 * be passed in with a held reference. 829 */ 830 void 831 ieee80211_sta_leave(struct ieee80211_node *ni) 832 { 833 struct ieee80211com *ic = ni->ni_ic; 834 835 ic->ic_node_cleanup(ni); 836 ieee80211_notify_node_leave(ni); 837 } 838 839 /* 840 * Send a deauthenticate frame and drop the station. 841 */ 842 void 843 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 844 { 845 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */ 846 ieee80211_ref_node(ni); 847 if (ni->ni_associd != 0) 848 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 849 ieee80211_node_leave(ni); 850 ieee80211_free_node(ni); 851 } 852 853 static struct ieee80211_node * 854 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 855 { 856 struct ieee80211_node *ni; 857 858 ni = (struct ieee80211_node *) malloc(sizeof(struct ieee80211_node), 859 M_80211_NODE, M_NOWAIT | M_ZERO); 860 return ni; 861 } 862 863 /* 864 * Initialize an ie blob with the specified data. If previous 865 * data exists re-use the data block. As a side effect we clear 866 * all references to specific ie's; the caller is required to 867 * recalculate them. 868 */ 869 int 870 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 871 { 872 /* NB: assumes data+len are the last fields */ 873 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 874 if (ies->data != NULL && ies->len != len) { 875 /* data size changed */ 876 free(ies->data, M_80211_NODE_IE); 877 ies->data = NULL; 878 } 879 if (ies->data == NULL) { 880 ies->data = (uint8_t *) malloc(len, M_80211_NODE_IE, M_NOWAIT); 881 if (ies->data == NULL) { 882 ies->len = 0; 883 /* NB: pointers have already been zero'd above */ 884 return 0; 885 } 886 } 887 memcpy(ies->data, data, len); 888 ies->len = len; 889 return 1; 890 } 891 892 /* 893 * Reclaim storage for an ie blob. 894 */ 895 void 896 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 897 { 898 if (ies->data != NULL) 899 free(ies->data, M_80211_NODE_IE); 900 } 901 902 /* 903 * Expand an ie blob data contents and to fillin individual 904 * ie pointers. The data blob is assumed to be well-formed; 905 * we don't do any validity checking of ie lengths. 906 */ 907 void 908 ieee80211_ies_expand(struct ieee80211_ies *ies) 909 { 910 uint8_t *ie; 911 int ielen; 912 913 ie = ies->data; 914 ielen = ies->len; 915 while (ielen > 0) { 916 switch (ie[0]) { 917 case IEEE80211_ELEMID_VENDOR: 918 if (iswpaoui(ie)) 919 ies->wpa_ie = ie; 920 else if (iswmeoui(ie)) 921 ies->wme_ie = ie; 922 #ifdef IEEE80211_SUPPORT_SUPERG 923 else if (isatherosoui(ie)) 924 ies->ath_ie = ie; 925 #endif 926 #ifdef IEEE80211_SUPPORT_TDMA 927 else if (istdmaoui(ie)) 928 ies->tdma_ie = ie; 929 #endif 930 break; 931 case IEEE80211_ELEMID_RSN: 932 ies->rsn_ie = ie; 933 break; 934 case IEEE80211_ELEMID_HTCAP: 935 ies->htcap_ie = ie; 936 break; 937 #ifdef IEEE80211_SUPPORT_MESH 938 case IEEE80211_ELEMID_MESHID: 939 ies->meshid_ie = ie; 940 break; 941 #endif 942 } 943 ielen -= 2 + ie[1]; 944 ie += 2 + ie[1]; 945 } 946 } 947 948 /* 949 * Reclaim any resources in a node and reset any critical 950 * state. Typically nodes are free'd immediately after, 951 * but in some cases the storage may be reused so we need 952 * to insure consistent state (should probably fix that). 953 */ 954 static void 955 node_cleanup(struct ieee80211_node *ni) 956 { 957 #define N(a) (sizeof(a)/sizeof(a[0])) 958 struct ieee80211vap *vap = ni->ni_vap; 959 struct ieee80211com *ic = ni->ni_ic; 960 int i; 961 962 /* NB: preserve ni_table */ 963 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 964 if (vap->iv_opmode != IEEE80211_M_STA) 965 vap->iv_ps_sta--; 966 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 967 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 968 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 969 } 970 /* 971 * Cleanup any HT-related state. 972 */ 973 if (ni->ni_flags & IEEE80211_NODE_HT) 974 ieee80211_ht_node_cleanup(ni); 975 #ifdef IEEE80211_SUPPORT_SUPERG 976 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH) 977 ieee80211_ff_node_cleanup(ni); 978 #endif 979 #ifdef IEEE80211_SUPPORT_MESH 980 /* 981 * Cleanup any mesh-related state. 982 */ 983 if (vap->iv_opmode == IEEE80211_M_MBSS) 984 ieee80211_mesh_node_cleanup(ni); 985 #endif 986 /* 987 * Clear any staging queue entries. 988 */ 989 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 990 991 /* 992 * Clear AREF flag that marks the authorization refcnt bump 993 * has happened. This is probably not needed as the node 994 * should always be removed from the table so not found but 995 * do it just in case. 996 * Likewise clear the ASSOCID flag as these flags are intended 997 * to be managed in tandem. 998 */ 999 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1000 1001 /* 1002 * Drain power save queue and, if needed, clear TIM. 1003 */ 1004 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1005 vap->iv_set_tim(ni, 0); 1006 1007 ni->ni_associd = 0; 1008 if (ni->ni_challenge != NULL) { 1009 free(ni->ni_challenge, M_80211_NODE); 1010 ni->ni_challenge = NULL; 1011 } 1012 /* 1013 * Preserve SSID, WPA, and WME ie's so the bss node is 1014 * reusable during a re-auth/re-assoc state transition. 1015 * If we remove these data they will not be recreated 1016 * because they come from a probe-response or beacon frame 1017 * which cannot be expected prior to the association-response. 1018 * This should not be an issue when operating in other modes 1019 * as stations leaving always go through a full state transition 1020 * which will rebuild this state. 1021 * 1022 * XXX does this leave us open to inheriting old state? 1023 */ 1024 for (i = 0; i < N(ni->ni_rxfrag); i++) 1025 if (ni->ni_rxfrag[i] != NULL) { 1026 m_freem(ni->ni_rxfrag[i]); 1027 ni->ni_rxfrag[i] = NULL; 1028 } 1029 /* 1030 * Must be careful here to remove any key map entry w/o a LOR. 1031 */ 1032 ieee80211_node_delucastkey(ni); 1033 #undef N 1034 } 1035 1036 static void 1037 node_free(struct ieee80211_node *ni) 1038 { 1039 struct ieee80211com *ic = ni->ni_ic; 1040 1041 if (ni->ni_vap->iv_caps & IEEE80211_C_RATECTL) 1042 ieee80211_ratectl_node_deinit(ni); 1043 ic->ic_node_cleanup(ni); 1044 ieee80211_ies_cleanup(&ni->ni_ies); 1045 ieee80211_psq_cleanup(&ni->ni_psq); 1046 free(ni, M_80211_NODE); 1047 } 1048 1049 static void 1050 node_age(struct ieee80211_node *ni) 1051 { 1052 struct ieee80211vap *vap = ni->ni_vap; 1053 1054 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta); 1055 1056 /* 1057 * Age frames on the power save queue. 1058 */ 1059 if (ieee80211_node_psq_age(ni) != 0 && 1060 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1061 vap->iv_set_tim(ni, 0); 1062 /* 1063 * Age out HT resources (e.g. frames on the 1064 * A-MPDU reorder queues). 1065 */ 1066 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1067 ieee80211_ht_node_age(ni); 1068 } 1069 1070 static int8_t 1071 node_getrssi(const struct ieee80211_node *ni) 1072 { 1073 uint32_t avgrssi = ni->ni_avgrssi; 1074 int32_t rssi; 1075 1076 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1077 return 0; 1078 rssi = IEEE80211_RSSI_GET(avgrssi); 1079 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1080 } 1081 1082 static void 1083 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1084 { 1085 *rssi = node_getrssi(ni); 1086 *noise = ni->ni_noise; 1087 } 1088 1089 static void 1090 node_getmimoinfo(const struct ieee80211_node *ni, 1091 struct ieee80211_mimo_info *info) 1092 { 1093 /* XXX zero data? */ 1094 } 1095 1096 struct ieee80211_node * 1097 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1098 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1099 { 1100 struct ieee80211com *ic = nt->nt_ic; 1101 struct ieee80211_node *ni; 1102 int hash; 1103 1104 ni = ic->ic_node_alloc(vap, macaddr); 1105 if (ni == NULL) { 1106 vap->iv_stats.is_rx_nodealloc++; 1107 return NULL; 1108 } 1109 1110 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1111 "%s %p<%s> in %s table\n", __func__, ni, 1112 ether_sprintf(macaddr), nt->nt_name); 1113 1114 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1115 hash = IEEE80211_NODE_HASH(ic, macaddr); 1116 ieee80211_node_initref(ni); /* mark referenced */ 1117 ni->ni_chan = IEEE80211_CHAN_ANYC; 1118 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1119 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1120 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1121 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1122 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1123 ni->ni_inact_reload = nt->nt_inact_init; 1124 ni->ni_inact = ni->ni_inact_reload; 1125 ni->ni_ath_defkeyix = 0x7fff; 1126 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1127 #ifdef IEEE80211_SUPPORT_MESH 1128 if (vap->iv_opmode == IEEE80211_M_MBSS) 1129 ieee80211_mesh_node_init(vap, ni); 1130 #endif 1131 IEEE80211_NODE_LOCK(nt); 1132 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1133 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1134 ni->ni_table = nt; 1135 ni->ni_vap = vap; 1136 ni->ni_ic = ic; 1137 IEEE80211_NODE_UNLOCK(nt); 1138 1139 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1140 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1141 1142 return ni; 1143 } 1144 1145 /* 1146 * Craft a temporary node suitable for sending a management frame 1147 * to the specified station. We craft only as much state as we 1148 * need to do the work since the node will be immediately reclaimed 1149 * once the send completes. 1150 */ 1151 struct ieee80211_node * 1152 ieee80211_tmp_node(struct ieee80211vap *vap, 1153 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1154 { 1155 struct ieee80211com *ic = vap->iv_ic; 1156 struct ieee80211_node *ni; 1157 1158 ni = ic->ic_node_alloc(vap, macaddr); 1159 if (ni != NULL) { 1160 struct ieee80211_node *bss = vap->iv_bss; 1161 1162 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1163 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1164 1165 ni->ni_table = NULL; /* NB: pedantic */ 1166 ni->ni_ic = ic; /* NB: needed to set channel */ 1167 ni->ni_vap = vap; 1168 1169 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1170 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1171 ieee80211_node_initref(ni); /* mark referenced */ 1172 /* NB: required by ieee80211_fix_rate */ 1173 ieee80211_node_set_chan(ni, bss->ni_chan); 1174 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1175 IEEE80211_KEYIX_NONE); 1176 ni->ni_txpower = bss->ni_txpower; 1177 /* XXX optimize away */ 1178 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1179 } else { 1180 /* XXX msg */ 1181 vap->iv_stats.is_rx_nodealloc++; 1182 } 1183 return ni; 1184 } 1185 1186 struct ieee80211_node * 1187 ieee80211_dup_bss(struct ieee80211vap *vap, 1188 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1189 { 1190 struct ieee80211com *ic = vap->iv_ic; 1191 struct ieee80211_node *ni; 1192 1193 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1194 if (ni != NULL) { 1195 struct ieee80211_node *bss = vap->iv_bss; 1196 /* 1197 * Inherit from iv_bss. 1198 */ 1199 copy_bss(ni, bss); 1200 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1201 ieee80211_node_set_chan(ni, bss->ni_chan); 1202 } 1203 return ni; 1204 } 1205 1206 /* 1207 * Create a bss node for a legacy WDS vap. The far end does 1208 * not associate so we just create create a new node and 1209 * simulate an association. The caller is responsible for 1210 * installing the node as the bss node and handling any further 1211 * setup work like authorizing the port. 1212 */ 1213 struct ieee80211_node * 1214 ieee80211_node_create_wds(struct ieee80211vap *vap, 1215 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1216 { 1217 struct ieee80211com *ic = vap->iv_ic; 1218 struct ieee80211_node *ni; 1219 1220 /* XXX check if node already in sta table? */ 1221 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1222 if (ni != NULL) { 1223 ni->ni_wdsvap = vap; 1224 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1225 /* 1226 * Inherit any manually configured settings. 1227 */ 1228 copy_bss(ni, vap->iv_bss); 1229 ieee80211_node_set_chan(ni, chan); 1230 /* NB: propagate ssid so available to WPA supplicant */ 1231 ni->ni_esslen = vap->iv_des_ssid[0].len; 1232 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1233 /* NB: no associd for peer */ 1234 /* 1235 * There are no management frames to use to 1236 * discover neighbor capabilities, so blindly 1237 * propagate the local configuration. 1238 */ 1239 if (vap->iv_flags & IEEE80211_F_WME) 1240 ni->ni_flags |= IEEE80211_NODE_QOS; 1241 #ifdef IEEE80211_SUPPORT_SUPERG 1242 if (vap->iv_flags & IEEE80211_F_FF) 1243 ni->ni_flags |= IEEE80211_NODE_FF; 1244 #endif 1245 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1246 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1247 /* 1248 * Device is HT-capable and HT is enabled for 1249 * the vap; setup HT operation. On return 1250 * ni_chan will be adjusted to an HT channel. 1251 */ 1252 ieee80211_ht_wds_init(ni); 1253 } else { 1254 struct ieee80211_channel *c = ni->ni_chan; 1255 /* 1256 * Force a legacy channel to be used. 1257 */ 1258 c = ieee80211_find_channel(ic, 1259 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1260 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1261 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1262 ni->ni_chan = c; 1263 } 1264 } 1265 return ni; 1266 } 1267 1268 struct ieee80211_node * 1269 #ifdef IEEE80211_DEBUG_REFCNT 1270 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1271 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1272 #else 1273 ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1274 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1275 #endif 1276 { 1277 struct ieee80211_node *ni; 1278 int hash; 1279 1280 IEEE80211_NODE_LOCK_ASSERT(nt); 1281 1282 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1283 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1284 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1285 ieee80211_ref_node(ni); /* mark referenced */ 1286 #ifdef IEEE80211_DEBUG_REFCNT 1287 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1288 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1289 func, line, 1290 ni, ether_sprintf(ni->ni_macaddr), 1291 ieee80211_node_refcnt(ni)); 1292 #endif 1293 return ni; 1294 } 1295 } 1296 return NULL; 1297 } 1298 1299 struct ieee80211_node * 1300 #ifdef IEEE80211_DEBUG_REFCNT 1301 ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1302 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1303 #else 1304 ieee80211_find_node(struct ieee80211_node_table *nt, 1305 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1306 #endif 1307 { 1308 struct ieee80211_node *ni; 1309 1310 IEEE80211_NODE_LOCK(nt); 1311 ni = ieee80211_find_node_locked(nt, macaddr); 1312 IEEE80211_NODE_UNLOCK(nt); 1313 return ni; 1314 } 1315 1316 struct ieee80211_node * 1317 #ifdef IEEE80211_DEBUG_REFCNT 1318 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1319 const struct ieee80211vap *vap, 1320 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1321 #else 1322 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1323 const struct ieee80211vap *vap, 1324 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1325 #endif 1326 { 1327 struct ieee80211_node *ni; 1328 int hash; 1329 1330 IEEE80211_NODE_LOCK_ASSERT(nt); 1331 1332 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1333 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1334 if (ni->ni_vap == vap && 1335 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1336 ieee80211_ref_node(ni); /* mark referenced */ 1337 #ifdef IEEE80211_DEBUG_REFCNT 1338 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1339 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1340 func, line, 1341 ni, ether_sprintf(ni->ni_macaddr), 1342 ieee80211_node_refcnt(ni)); 1343 #endif 1344 return ni; 1345 } 1346 } 1347 return NULL; 1348 } 1349 1350 struct ieee80211_node * 1351 #ifdef IEEE80211_DEBUG_REFCNT 1352 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1353 const struct ieee80211vap *vap, 1354 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1355 #else 1356 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1357 const struct ieee80211vap *vap, 1358 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1359 #endif 1360 { 1361 struct ieee80211_node *ni; 1362 1363 IEEE80211_NODE_LOCK(nt); 1364 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1365 IEEE80211_NODE_UNLOCK(nt); 1366 return ni; 1367 } 1368 1369 /* 1370 * Fake up a node; this handles node discovery in adhoc mode. 1371 * Note that for the driver's benefit we we treat this like 1372 * an association so the driver has an opportunity to setup 1373 * it's private state. 1374 */ 1375 struct ieee80211_node * 1376 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1377 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1378 { 1379 struct ieee80211_node *ni; 1380 1381 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1382 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1383 ni = ieee80211_dup_bss(vap, macaddr); 1384 if (ni != NULL) { 1385 struct ieee80211com *ic = vap->iv_ic; 1386 1387 /* XXX no rate negotiation; just dup */ 1388 ni->ni_rates = vap->iv_bss->ni_rates; 1389 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1390 ni->ni_flags |= IEEE80211_NODE_ERP; 1391 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1392 /* 1393 * In adhoc demo mode there are no management 1394 * frames to use to discover neighbor capabilities, 1395 * so blindly propagate the local configuration 1396 * so we can do interesting things (e.g. use 1397 * WME to disable ACK's). 1398 */ 1399 if (vap->iv_flags & IEEE80211_F_WME) 1400 ni->ni_flags |= IEEE80211_NODE_QOS; 1401 #ifdef IEEE80211_SUPPORT_SUPERG 1402 if (vap->iv_flags & IEEE80211_F_FF) 1403 ni->ni_flags |= IEEE80211_NODE_FF; 1404 #endif 1405 } 1406 ieee80211_node_setuptxparms(ni); 1407 if (vap->iv_caps & IEEE80211_C_RATECTL) 1408 ieee80211_ratectl_node_init(ni); 1409 if (ic->ic_newassoc != NULL) 1410 ic->ic_newassoc(ni, 1); 1411 /* XXX not right for 802.1x/WPA */ 1412 ieee80211_node_authorize(ni); 1413 } 1414 return ni; 1415 } 1416 1417 void 1418 ieee80211_init_neighbor(struct ieee80211_node *ni, 1419 const struct ieee80211_frame *wh, 1420 const struct ieee80211_scanparams *sp) 1421 { 1422 ni->ni_esslen = sp->ssid[1]; 1423 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1424 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1425 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1426 ni->ni_intval = sp->bintval; 1427 ni->ni_capinfo = sp->capinfo; 1428 ni->ni_chan = ni->ni_ic->ic_curchan; 1429 ni->ni_fhdwell = sp->fhdwell; 1430 ni->ni_fhindex = sp->fhindex; 1431 ni->ni_erp = sp->erp; 1432 ni->ni_timoff = sp->timoff; 1433 #ifdef IEEE80211_SUPPORT_MESH 1434 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1435 ieee80211_mesh_init_neighbor(ni, wh, sp); 1436 #endif 1437 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1438 ieee80211_ies_expand(&ni->ni_ies); 1439 if (ni->ni_ies.wme_ie != NULL) 1440 ni->ni_flags |= IEEE80211_NODE_QOS; 1441 else 1442 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1443 #ifdef IEEE80211_SUPPORT_SUPERG 1444 if (ni->ni_ies.ath_ie != NULL) 1445 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1446 #endif 1447 } 1448 1449 /* NB: must be after ni_chan is setup */ 1450 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1451 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1452 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1453 } 1454 1455 /* 1456 * Do node discovery in adhoc mode on receipt of a beacon 1457 * or probe response frame. Note that for the driver's 1458 * benefit we we treat this like an association so the 1459 * driver has an opportunity to setup it's private state. 1460 */ 1461 struct ieee80211_node * 1462 ieee80211_add_neighbor(struct ieee80211vap *vap, 1463 const struct ieee80211_frame *wh, 1464 const struct ieee80211_scanparams *sp) 1465 { 1466 struct ieee80211_node *ni; 1467 1468 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1469 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1470 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1471 if (ni != NULL) { 1472 struct ieee80211com *ic = vap->iv_ic; 1473 1474 ieee80211_init_neighbor(ni, wh, sp); 1475 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1476 ni->ni_flags |= IEEE80211_NODE_ERP; 1477 ieee80211_node_setuptxparms(ni); 1478 if (vap->iv_caps & IEEE80211_C_RATECTL) 1479 ieee80211_ratectl_node_init(ni); 1480 if (ic->ic_newassoc != NULL) 1481 ic->ic_newassoc(ni, 1); 1482 /* XXX not right for 802.1x/WPA */ 1483 ieee80211_node_authorize(ni); 1484 } 1485 return ni; 1486 } 1487 1488 #define IS_PROBEREQ(wh) \ 1489 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1490 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1491 #define IS_BCAST_PROBEREQ(wh) \ 1492 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1493 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1494 1495 static __inline struct ieee80211_node * 1496 _find_rxnode(struct ieee80211_node_table *nt, 1497 const struct ieee80211_frame_min *wh) 1498 { 1499 if (IS_BCAST_PROBEREQ(wh)) 1500 return NULL; /* spam bcast probe req to all vap's */ 1501 return ieee80211_find_node_locked(nt, wh->i_addr2); 1502 } 1503 1504 /* 1505 * Locate the node for sender, track state, and then pass the 1506 * (referenced) node up to the 802.11 layer for its use. Note 1507 * we can return NULL if the sender is not in the table. 1508 */ 1509 struct ieee80211_node * 1510 #ifdef IEEE80211_DEBUG_REFCNT 1511 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1512 const struct ieee80211_frame_min *wh, const char *func, int line) 1513 #else 1514 ieee80211_find_rxnode(struct ieee80211com *ic, 1515 const struct ieee80211_frame_min *wh) 1516 #endif 1517 { 1518 struct ieee80211_node_table *nt; 1519 struct ieee80211_node *ni; 1520 1521 nt = &ic->ic_sta; 1522 IEEE80211_NODE_LOCK(nt); 1523 ni = _find_rxnode(nt, wh); 1524 IEEE80211_NODE_UNLOCK(nt); 1525 1526 return ni; 1527 } 1528 1529 /* 1530 * Like ieee80211_find_rxnode but use the supplied h/w 1531 * key index as a hint to locate the node in the key 1532 * mapping table. If an entry is present at the key 1533 * index we return it; otherwise do a normal lookup and 1534 * update the mapping table if the station has a unicast 1535 * key assigned to it. 1536 */ 1537 struct ieee80211_node * 1538 #ifdef IEEE80211_DEBUG_REFCNT 1539 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1540 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1541 const char *func, int line) 1542 #else 1543 ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1544 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1545 #endif 1546 { 1547 struct ieee80211_node_table *nt; 1548 struct ieee80211_node *ni; 1549 1550 nt = &ic->ic_sta; 1551 IEEE80211_NODE_LOCK(nt); 1552 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1553 ni = nt->nt_keyixmap[keyix]; 1554 else 1555 ni = NULL; 1556 if (ni == NULL) { 1557 ni = _find_rxnode(nt, wh); 1558 if (ni != NULL && nt->nt_keyixmap != NULL) { 1559 /* 1560 * If the station has a unicast key cache slot 1561 * assigned update the key->node mapping table. 1562 */ 1563 keyix = ni->ni_ucastkey.wk_rxkeyix; 1564 /* XXX can keyixmap[keyix] != NULL? */ 1565 if (keyix < nt->nt_keyixmax && 1566 nt->nt_keyixmap[keyix] == NULL) { 1567 IEEE80211_DPRINTF(ni->ni_vap, 1568 IEEE80211_MSG_NODE, 1569 "%s: add key map entry %p<%s> refcnt %d\n", 1570 __func__, ni, ether_sprintf(ni->ni_macaddr), 1571 ieee80211_node_refcnt(ni)+1); 1572 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1573 } 1574 } 1575 } else { 1576 if (IS_BCAST_PROBEREQ(wh)) 1577 ni = NULL; /* spam bcast probe req to all vap's */ 1578 else 1579 ieee80211_ref_node(ni); 1580 } 1581 IEEE80211_NODE_UNLOCK(nt); 1582 1583 return ni; 1584 } 1585 #undef IS_BCAST_PROBEREQ 1586 #undef IS_PROBEREQ 1587 1588 /* 1589 * Return a reference to the appropriate node for sending 1590 * a data frame. This handles node discovery in adhoc networks. 1591 */ 1592 struct ieee80211_node * 1593 #ifdef IEEE80211_DEBUG_REFCNT 1594 ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1595 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1596 const char *func, int line) 1597 #else 1598 ieee80211_find_txnode(struct ieee80211vap *vap, 1599 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1600 #endif 1601 { 1602 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1603 struct ieee80211_node *ni; 1604 1605 /* 1606 * The destination address should be in the node table 1607 * unless this is a multicast/broadcast frame. We can 1608 * also optimize station mode operation, all frames go 1609 * to the bss node. 1610 */ 1611 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1612 IEEE80211_NODE_LOCK(nt); 1613 if (vap->iv_opmode == IEEE80211_M_STA || 1614 vap->iv_opmode == IEEE80211_M_WDS || 1615 IEEE80211_IS_MULTICAST(macaddr)) 1616 ni = ieee80211_ref_node(vap->iv_bss); 1617 else 1618 ni = ieee80211_find_node_locked(nt, macaddr); 1619 IEEE80211_NODE_UNLOCK(nt); 1620 1621 if (ni == NULL) { 1622 if (vap->iv_opmode == IEEE80211_M_IBSS || 1623 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1624 /* 1625 * In adhoc mode cons up a node for the destination. 1626 * Note that we need an additional reference for the 1627 * caller to be consistent with 1628 * ieee80211_find_node_locked. 1629 */ 1630 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1631 if (ni != NULL) 1632 (void) ieee80211_ref_node(ni); 1633 } else { 1634 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1635 "no node, discard frame (%s)", __func__); 1636 vap->iv_stats.is_tx_nonode++; 1637 } 1638 } 1639 return ni; 1640 } 1641 1642 static void 1643 _ieee80211_free_node(struct ieee80211_node *ni) 1644 { 1645 struct ieee80211_node_table *nt = ni->ni_table; 1646 1647 /* 1648 * NB: careful about referencing the vap as it may be 1649 * gone if the last reference was held by a driver. 1650 * We know the com will always be present so it's safe 1651 * to use ni_ic below to reclaim resources. 1652 */ 1653 #if 0 1654 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1655 "%s %p<%s> in %s table\n", __func__, ni, 1656 ether_sprintf(ni->ni_macaddr), 1657 nt != NULL ? nt->nt_name : "<gone>"); 1658 #endif 1659 if (ni->ni_associd != 0) { 1660 struct ieee80211vap *vap = ni->ni_vap; 1661 if (vap->iv_aid_bitmap != NULL) 1662 IEEE80211_AID_CLR(vap, ni->ni_associd); 1663 } 1664 if (nt != NULL) { 1665 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1666 LIST_REMOVE(ni, ni_hash); 1667 } 1668 ni->ni_ic->ic_node_free(ni); 1669 } 1670 1671 void 1672 #ifdef IEEE80211_DEBUG_REFCNT 1673 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1674 #else 1675 ieee80211_free_node(struct ieee80211_node *ni) 1676 #endif 1677 { 1678 struct ieee80211_node_table *nt = ni->ni_table; 1679 1680 #ifdef IEEE80211_DEBUG_REFCNT 1681 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1682 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1683 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1684 #endif 1685 if (nt != NULL) { 1686 IEEE80211_NODE_LOCK(nt); 1687 if (ieee80211_node_dectestref(ni)) { 1688 /* 1689 * Last reference, reclaim state. 1690 */ 1691 _ieee80211_free_node(ni); 1692 } else if (ieee80211_node_refcnt(ni) == 1 && 1693 nt->nt_keyixmap != NULL) { 1694 ieee80211_keyix keyix; 1695 /* 1696 * Check for a last reference in the key mapping table. 1697 */ 1698 keyix = ni->ni_ucastkey.wk_rxkeyix; 1699 if (keyix < nt->nt_keyixmax && 1700 nt->nt_keyixmap[keyix] == ni) { 1701 IEEE80211_DPRINTF(ni->ni_vap, 1702 IEEE80211_MSG_NODE, 1703 "%s: %p<%s> clear key map entry", __func__, 1704 ni, ether_sprintf(ni->ni_macaddr)); 1705 nt->nt_keyixmap[keyix] = NULL; 1706 ieee80211_node_decref(ni); /* XXX needed? */ 1707 _ieee80211_free_node(ni); 1708 } 1709 } 1710 IEEE80211_NODE_UNLOCK(nt); 1711 } else { 1712 if (ieee80211_node_dectestref(ni)) 1713 _ieee80211_free_node(ni); 1714 } 1715 } 1716 1717 /* 1718 * Reclaim a unicast key and clear any key cache state. 1719 */ 1720 int 1721 ieee80211_node_delucastkey(struct ieee80211_node *ni) 1722 { 1723 struct ieee80211com *ic = ni->ni_ic; 1724 struct ieee80211_node_table *nt = &ic->ic_sta; 1725 struct ieee80211_node *nikey; 1726 ieee80211_keyix keyix; 1727 int isowned, status; 1728 1729 /* 1730 * NB: We must beware of LOR here; deleting the key 1731 * can cause the crypto layer to block traffic updates 1732 * which can generate a LOR against the node table lock; 1733 * grab it here and stash the key index for our use below. 1734 * 1735 * Must also beware of recursion on the node table lock. 1736 * When called from node_cleanup we may already have 1737 * the node table lock held. Unfortunately there's no 1738 * way to separate out this path so we must do this 1739 * conditionally. 1740 */ 1741 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1742 if (!isowned) 1743 IEEE80211_NODE_LOCK(nt); 1744 nikey = NULL; 1745 status = 1; /* NB: success */ 1746 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1747 keyix = ni->ni_ucastkey.wk_rxkeyix; 1748 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1749 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1750 nikey = nt->nt_keyixmap[keyix]; 1751 nt->nt_keyixmap[keyix] = NULL; 1752 } 1753 } 1754 if (!isowned) 1755 IEEE80211_NODE_UNLOCK(nt); 1756 1757 if (nikey != NULL) { 1758 KASSERT(nikey == ni, 1759 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1760 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1761 "%s: delete key map entry %p<%s> refcnt %d\n", 1762 __func__, ni, ether_sprintf(ni->ni_macaddr), 1763 ieee80211_node_refcnt(ni)-1); 1764 ieee80211_free_node(ni); 1765 } 1766 return status; 1767 } 1768 1769 /* 1770 * Reclaim a node. If this is the last reference count then 1771 * do the normal free work. Otherwise remove it from the node 1772 * table and mark it gone by clearing the back-reference. 1773 */ 1774 static void 1775 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1776 { 1777 ieee80211_keyix keyix; 1778 1779 IEEE80211_NODE_LOCK_ASSERT(nt); 1780 1781 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1782 "%s: remove %p<%s> from %s table, refcnt %d\n", 1783 __func__, ni, ether_sprintf(ni->ni_macaddr), 1784 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1785 /* 1786 * Clear any entry in the unicast key mapping table. 1787 * We need to do it here so rx lookups don't find it 1788 * in the mapping table even if it's not in the hash 1789 * table. We cannot depend on the mapping table entry 1790 * being cleared because the node may not be free'd. 1791 */ 1792 keyix = ni->ni_ucastkey.wk_rxkeyix; 1793 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1794 nt->nt_keyixmap[keyix] == ni) { 1795 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1796 "%s: %p<%s> clear key map entry %u\n", 1797 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 1798 nt->nt_keyixmap[keyix] = NULL; 1799 ieee80211_node_decref(ni); /* NB: don't need free */ 1800 } 1801 if (!ieee80211_node_dectestref(ni)) { 1802 /* 1803 * Other references are present, just remove the 1804 * node from the table so it cannot be found. When 1805 * the references are dropped storage will be 1806 * reclaimed. 1807 */ 1808 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1809 LIST_REMOVE(ni, ni_hash); 1810 ni->ni_table = NULL; /* clear reference */ 1811 } else 1812 _ieee80211_free_node(ni); 1813 } 1814 1815 /* 1816 * Node table support. 1817 */ 1818 1819 static void 1820 ieee80211_node_table_init(struct ieee80211com *ic, 1821 struct ieee80211_node_table *nt, 1822 const char *name, int inact, int keyixmax) 1823 { 1824 struct ifnet *ifp = ic->ic_ifp; 1825 1826 nt->nt_ic = ic; 1827 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname); 1828 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname); 1829 TAILQ_INIT(&nt->nt_node); 1830 nt->nt_name = name; 1831 nt->nt_scangen = 1; 1832 nt->nt_inact_init = inact; 1833 nt->nt_keyixmax = keyixmax; 1834 if (nt->nt_keyixmax > 0) { 1835 nt->nt_keyixmap = (struct ieee80211_node **) malloc( 1836 keyixmax * sizeof(struct ieee80211_node *), 1837 M_80211_NODE, M_NOWAIT | M_ZERO); 1838 if (nt->nt_keyixmap == NULL) 1839 if_printf(ic->ic_ifp, 1840 "Cannot allocate key index map with %u entries\n", 1841 keyixmax); 1842 } else 1843 nt->nt_keyixmap = NULL; 1844 } 1845 1846 static void 1847 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1848 struct ieee80211vap *match) 1849 { 1850 struct ieee80211_node *ni, *next; 1851 1852 IEEE80211_NODE_LOCK(nt); 1853 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1854 if (match != NULL && ni->ni_vap != match) 1855 continue; 1856 /* XXX can this happen? if so need's work */ 1857 if (ni->ni_associd != 0) { 1858 struct ieee80211vap *vap = ni->ni_vap; 1859 1860 if (vap->iv_auth->ia_node_leave != NULL) 1861 vap->iv_auth->ia_node_leave(ni); 1862 if (vap->iv_aid_bitmap != NULL) 1863 IEEE80211_AID_CLR(vap, ni->ni_associd); 1864 } 1865 ni->ni_wdsvap = NULL; /* clear reference */ 1866 node_reclaim(nt, ni); 1867 } 1868 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1869 /* 1870 * Make a separate pass to clear references to this vap 1871 * held by DWDS entries. They will not be matched above 1872 * because ni_vap will point to the ap vap but we still 1873 * need to clear ni_wdsvap when the WDS vap is destroyed 1874 * and/or reset. 1875 */ 1876 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1877 if (ni->ni_wdsvap == match) 1878 ni->ni_wdsvap = NULL; 1879 } 1880 IEEE80211_NODE_UNLOCK(nt); 1881 } 1882 1883 static void 1884 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1885 { 1886 ieee80211_node_table_reset(nt, NULL); 1887 if (nt->nt_keyixmap != NULL) { 1888 #ifdef DIAGNOSTIC 1889 /* XXX verify all entries are NULL */ 1890 int i; 1891 for (i = 0; i < nt->nt_keyixmax; i++) 1892 if (nt->nt_keyixmap[i] != NULL) 1893 printf("%s: %s[%u] still active\n", __func__, 1894 nt->nt_name, i); 1895 #endif 1896 free(nt->nt_keyixmap, M_80211_NODE); 1897 nt->nt_keyixmap = NULL; 1898 } 1899 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1900 IEEE80211_NODE_LOCK_DESTROY(nt); 1901 } 1902 1903 /* 1904 * Timeout inactive stations and do related housekeeping. 1905 * Note that we cannot hold the node lock while sending a 1906 * frame as this would lead to a LOR. Instead we use a 1907 * generation number to mark nodes that we've scanned and 1908 * drop the lock and restart a scan if we have to time out 1909 * a node. Since we are single-threaded by virtue of 1910 * controlling the inactivity timer we can be sure this will 1911 * process each node only once. 1912 */ 1913 static void 1914 ieee80211_timeout_stations(struct ieee80211com *ic) 1915 { 1916 struct ieee80211_node_table *nt = &ic->ic_sta; 1917 struct ieee80211vap *vap; 1918 struct ieee80211_node *ni; 1919 int gen = 0; 1920 1921 IEEE80211_NODE_ITERATE_LOCK(nt); 1922 gen = ++nt->nt_scangen; 1923 restart: 1924 IEEE80211_NODE_LOCK(nt); 1925 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1926 if (ni->ni_scangen == gen) /* previously handled */ 1927 continue; 1928 ni->ni_scangen = gen; 1929 /* 1930 * Ignore entries for which have yet to receive an 1931 * authentication frame. These are transient and 1932 * will be reclaimed when the last reference to them 1933 * goes away (when frame xmits complete). 1934 */ 1935 vap = ni->ni_vap; 1936 /* 1937 * Only process stations when in RUN state. This 1938 * insures, for example, that we don't timeout an 1939 * inactive station during CAC. Note that CSA state 1940 * is actually handled in ieee80211_node_timeout as 1941 * it applies to more than timeout processing. 1942 */ 1943 if (vap->iv_state != IEEE80211_S_RUN) 1944 continue; 1945 /* XXX can vap be NULL? */ 1946 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 1947 vap->iv_opmode == IEEE80211_M_STA) && 1948 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1949 continue; 1950 /* 1951 * Free fragment if not needed anymore 1952 * (last fragment older than 1s). 1953 * XXX doesn't belong here, move to node_age 1954 */ 1955 if (ni->ni_rxfrag[0] != NULL && 1956 ticks > ni->ni_rxfragstamp + hz) { 1957 m_freem(ni->ni_rxfrag[0]); 1958 ni->ni_rxfrag[0] = NULL; 1959 } 1960 if (ni->ni_inact > 0) { 1961 ni->ni_inact--; 1962 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1963 "%s: inact %u inact_reload %u nrates %u", 1964 __func__, ni->ni_inact, ni->ni_inact_reload, 1965 ni->ni_rates.rs_nrates); 1966 } 1967 /* 1968 * Special case ourself; we may be idle for extended periods 1969 * of time and regardless reclaiming our state is wrong. 1970 * XXX run ic_node_age 1971 */ 1972 if (ni == vap->iv_bss) 1973 continue; 1974 if (ni->ni_associd != 0 || 1975 (vap->iv_opmode == IEEE80211_M_IBSS || 1976 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 1977 /* 1978 * Age/drain resources held by the station. 1979 */ 1980 ic->ic_node_age(ni); 1981 /* 1982 * Probe the station before time it out. We 1983 * send a null data frame which may not be 1984 * universally supported by drivers (need it 1985 * for ps-poll support so it should be...). 1986 * 1987 * XXX don't probe the station unless we've 1988 * received a frame from them (and have 1989 * some idea of the rates they are capable 1990 * of); this will get fixed more properly 1991 * soon with better handling of the rate set. 1992 */ 1993 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1994 (0 < ni->ni_inact && 1995 ni->ni_inact <= vap->iv_inact_probe) && 1996 ni->ni_rates.rs_nrates != 0) { 1997 IEEE80211_NOTE(vap, 1998 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1999 ni, "%s", 2000 "probe station due to inactivity"); 2001 /* 2002 * Grab a reference before unlocking the table 2003 * so the node cannot be reclaimed before we 2004 * send the frame. ieee80211_send_nulldata 2005 * understands we've done this and reclaims the 2006 * ref for us as needed. 2007 */ 2008 ieee80211_ref_node(ni); 2009 IEEE80211_NODE_UNLOCK(nt); 2010 ieee80211_send_nulldata(ni); 2011 /* XXX stat? */ 2012 goto restart; 2013 } 2014 } 2015 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2016 ni->ni_inact <= 0) { 2017 IEEE80211_NOTE(vap, 2018 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2019 "station timed out due to inactivity " 2020 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2021 /* 2022 * Send a deauthenticate frame and drop the station. 2023 * This is somewhat complicated due to reference counts 2024 * and locking. At this point a station will typically 2025 * have a reference count of 1. ieee80211_node_leave 2026 * will do a "free" of the node which will drop the 2027 * reference count. But in the meantime a reference 2028 * wil be held by the deauth frame. The actual reclaim 2029 * of the node will happen either after the tx is 2030 * completed or by ieee80211_node_leave. 2031 * 2032 * Separately we must drop the node lock before sending 2033 * in case the driver takes a lock, as this can result 2034 * in a LOR between the node lock and the driver lock. 2035 */ 2036 ieee80211_ref_node(ni); 2037 IEEE80211_NODE_UNLOCK(nt); 2038 if (ni->ni_associd != 0) { 2039 IEEE80211_SEND_MGMT(ni, 2040 IEEE80211_FC0_SUBTYPE_DEAUTH, 2041 IEEE80211_REASON_AUTH_EXPIRE); 2042 } 2043 ieee80211_node_leave(ni); 2044 ieee80211_free_node(ni); 2045 vap->iv_stats.is_node_timeout++; 2046 goto restart; 2047 } 2048 } 2049 IEEE80211_NODE_UNLOCK(nt); 2050 2051 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2052 } 2053 2054 /* 2055 * Aggressively reclaim resources. This should be used 2056 * only in a critical situation to reclaim mbuf resources. 2057 */ 2058 void 2059 ieee80211_drain(struct ieee80211com *ic) 2060 { 2061 struct ieee80211_node_table *nt = &ic->ic_sta; 2062 struct ieee80211vap *vap; 2063 struct ieee80211_node *ni; 2064 2065 IEEE80211_NODE_LOCK(nt); 2066 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2067 /* 2068 * Ignore entries for which have yet to receive an 2069 * authentication frame. These are transient and 2070 * will be reclaimed when the last reference to them 2071 * goes away (when frame xmits complete). 2072 */ 2073 vap = ni->ni_vap; 2074 /* 2075 * Only process stations when in RUN state. This 2076 * insures, for example, that we don't timeout an 2077 * inactive station during CAC. Note that CSA state 2078 * is actually handled in ieee80211_node_timeout as 2079 * it applies to more than timeout processing. 2080 */ 2081 if (vap->iv_state != IEEE80211_S_RUN) 2082 continue; 2083 /* XXX can vap be NULL? */ 2084 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2085 vap->iv_opmode == IEEE80211_M_STA) && 2086 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2087 continue; 2088 /* 2089 * Free fragments. 2090 * XXX doesn't belong here, move to node_drain 2091 */ 2092 if (ni->ni_rxfrag[0] != NULL) { 2093 m_freem(ni->ni_rxfrag[0]); 2094 ni->ni_rxfrag[0] = NULL; 2095 } 2096 /* 2097 * Drain resources held by the station. 2098 */ 2099 ic->ic_node_drain(ni); 2100 } 2101 IEEE80211_NODE_UNLOCK(nt); 2102 } 2103 2104 /* 2105 * Per-ieee80211com inactivity timer callback. 2106 */ 2107 void 2108 ieee80211_node_timeout(void *arg) 2109 { 2110 struct ieee80211com *ic = arg; 2111 2112 /* 2113 * Defer timeout processing if a channel switch is pending. 2114 * We typically need to be mute so not doing things that 2115 * might generate frames is good to handle in one place. 2116 * Supressing the station timeout processing may extend the 2117 * lifetime of inactive stations (by not decrementing their 2118 * idle counters) but this should be ok unless the CSA is 2119 * active for an unusually long time. 2120 */ 2121 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2122 ieee80211_scan_timeout(ic); 2123 ieee80211_timeout_stations(ic); 2124 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2125 2126 IEEE80211_LOCK(ic); 2127 ieee80211_erp_timeout(ic); 2128 ieee80211_ht_timeout(ic); 2129 IEEE80211_UNLOCK(ic); 2130 } 2131 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2132 ieee80211_node_timeout, ic); 2133 } 2134 2135 void 2136 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2137 ieee80211_iter_func *f, void *arg) 2138 { 2139 struct ieee80211_node *ni; 2140 u_int gen; 2141 2142 IEEE80211_NODE_ITERATE_LOCK(nt); 2143 gen = ++nt->nt_scangen; 2144 restart: 2145 IEEE80211_NODE_LOCK(nt); 2146 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2147 if (ni->ni_scangen != gen) { 2148 ni->ni_scangen = gen; 2149 (void) ieee80211_ref_node(ni); 2150 IEEE80211_NODE_UNLOCK(nt); 2151 (*f)(arg, ni); 2152 ieee80211_free_node(ni); 2153 goto restart; 2154 } 2155 } 2156 IEEE80211_NODE_UNLOCK(nt); 2157 2158 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2159 } 2160 2161 void 2162 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2163 { 2164 printf("0x%p: mac %s refcnt %d\n", ni, 2165 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2166 printf("\tscangen %u authmode %u flags 0x%x\n", 2167 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2168 printf("\tassocid 0x%x txpower %u vlan %u\n", 2169 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2170 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2171 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2172 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2173 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2174 ni->ni_rxfragstamp); 2175 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2176 node_getrssi(ni), ni->ni_noise, 2177 ni->ni_intval, ni->ni_capinfo); 2178 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2179 ether_sprintf(ni->ni_bssid), 2180 ni->ni_esslen, ni->ni_essid, 2181 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2182 printf("\tinact %u inact_reload %u txrate %u\n", 2183 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2184 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2185 ni->ni_htcap, ni->ni_htparam, 2186 ni->ni_htctlchan, ni->ni_ht2ndchan); 2187 printf("\thtopmode %x htstbc %x chw %u\n", 2188 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2189 } 2190 2191 void 2192 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2193 { 2194 ieee80211_iterate_nodes(nt, 2195 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2196 } 2197 2198 static void 2199 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2200 { 2201 struct ieee80211vap *vap; 2202 2203 IEEE80211_LOCK_ASSERT(ic); 2204 2205 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2206 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2207 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2208 } 2209 2210 void 2211 ieee80211_notify_erp(struct ieee80211com *ic) 2212 { 2213 IEEE80211_LOCK(ic); 2214 ieee80211_notify_erp_locked(ic); 2215 IEEE80211_UNLOCK(ic); 2216 } 2217 2218 /* 2219 * Handle a station joining an 11g network. 2220 */ 2221 static void 2222 ieee80211_node_join_11g(struct ieee80211_node *ni) 2223 { 2224 struct ieee80211com *ic = ni->ni_ic; 2225 2226 IEEE80211_LOCK_ASSERT(ic); 2227 2228 /* 2229 * Station isn't capable of short slot time. Bump 2230 * the count of long slot time stations and disable 2231 * use of short slot time. Note that the actual switch 2232 * over to long slot time use may not occur until the 2233 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2234 */ 2235 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2236 ic->ic_longslotsta++; 2237 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2238 "station needs long slot time, count %d", 2239 ic->ic_longslotsta); 2240 /* XXX vap's w/ conflicting needs won't work */ 2241 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2242 /* 2243 * Don't force slot time when switched to turbo 2244 * mode as non-ERP stations won't be present; this 2245 * need only be done when on the normal G channel. 2246 */ 2247 ieee80211_set_shortslottime(ic, 0); 2248 } 2249 } 2250 /* 2251 * If the new station is not an ERP station 2252 * then bump the counter and enable protection 2253 * if configured. 2254 */ 2255 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2256 ic->ic_nonerpsta++; 2257 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2258 "station is !ERP, %d non-ERP stations associated", 2259 ic->ic_nonerpsta); 2260 /* 2261 * If station does not support short preamble 2262 * then we must enable use of Barker preamble. 2263 */ 2264 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2265 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2266 "%s", "station needs long preamble"); 2267 ic->ic_flags |= IEEE80211_F_USEBARKER; 2268 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2269 } 2270 /* 2271 * If protection is configured and this is the first 2272 * indication we should use protection, enable it. 2273 */ 2274 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2275 ic->ic_nonerpsta == 1 && 2276 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2277 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2278 "%s: enable use of protection\n", __func__); 2279 ic->ic_flags |= IEEE80211_F_USEPROT; 2280 ieee80211_notify_erp_locked(ic); 2281 } 2282 } else 2283 ni->ni_flags |= IEEE80211_NODE_ERP; 2284 } 2285 2286 void 2287 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2288 { 2289 struct ieee80211com *ic = ni->ni_ic; 2290 struct ieee80211vap *vap = ni->ni_vap; 2291 int newassoc; 2292 2293 if (ni->ni_associd == 0) { 2294 uint16_t aid; 2295 2296 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2297 /* 2298 * It would be good to search the bitmap 2299 * more efficiently, but this will do for now. 2300 */ 2301 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2302 if (!IEEE80211_AID_ISSET(vap, aid)) 2303 break; 2304 } 2305 if (aid >= vap->iv_max_aid) { 2306 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2307 ieee80211_node_leave(ni); 2308 return; 2309 } 2310 ni->ni_associd = aid | 0xc000; 2311 ni->ni_jointime = time_uptime; 2312 IEEE80211_LOCK(ic); 2313 IEEE80211_AID_SET(vap, ni->ni_associd); 2314 vap->iv_sta_assoc++; 2315 ic->ic_sta_assoc++; 2316 2317 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2318 ieee80211_ht_node_join(ni); 2319 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2320 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2321 ieee80211_node_join_11g(ni); 2322 IEEE80211_UNLOCK(ic); 2323 2324 newassoc = 1; 2325 } else 2326 newassoc = 0; 2327 2328 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2329 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2330 IEEE80211_NODE_AID(ni), 2331 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2332 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2333 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2334 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2335 ni->ni_flags & IEEE80211_NODE_HT ? 2336 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2337 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2338 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2339 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2340 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2341 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2342 ", fast-frames" : "", 2343 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2344 ", turbo" : "" 2345 ); 2346 2347 ieee80211_node_setuptxparms(ni); 2348 if (vap->iv_caps & IEEE80211_C_RATECTL) 2349 ieee80211_ratectl_node_init(ni); 2350 /* give driver a chance to setup state like ni_txrate */ 2351 if (ic->ic_newassoc != NULL) 2352 ic->ic_newassoc(ni, newassoc); 2353 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2354 /* tell the authenticator about new station */ 2355 if (vap->iv_auth->ia_node_join != NULL) 2356 vap->iv_auth->ia_node_join(ni); 2357 ieee80211_notify_node_join(ni, 2358 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2359 } 2360 2361 static void 2362 disable_protection(struct ieee80211com *ic) 2363 { 2364 KASSERT(ic->ic_nonerpsta == 0 && 2365 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2366 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2367 ic->ic_flags_ext)); 2368 2369 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2370 /* XXX verify mode? */ 2371 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2372 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2373 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2374 } 2375 ieee80211_notify_erp_locked(ic); 2376 } 2377 2378 /* 2379 * Handle a station leaving an 11g network. 2380 */ 2381 static void 2382 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2383 { 2384 struct ieee80211com *ic = ni->ni_ic; 2385 2386 IEEE80211_LOCK_ASSERT(ic); 2387 2388 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2389 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2390 ic->ic_bsschan->ic_flags)); 2391 2392 /* 2393 * If a long slot station do the slot time bookkeeping. 2394 */ 2395 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2396 KASSERT(ic->ic_longslotsta > 0, 2397 ("bogus long slot station count %d", ic->ic_longslotsta)); 2398 ic->ic_longslotsta--; 2399 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2400 "long slot time station leaves, count now %d", 2401 ic->ic_longslotsta); 2402 if (ic->ic_longslotsta == 0) { 2403 /* 2404 * Re-enable use of short slot time if supported 2405 * and not operating in IBSS mode (per spec). 2406 */ 2407 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2408 ic->ic_opmode != IEEE80211_M_IBSS) { 2409 IEEE80211_DPRINTF(ni->ni_vap, 2410 IEEE80211_MSG_ASSOC, 2411 "%s: re-enable use of short slot time\n", 2412 __func__); 2413 ieee80211_set_shortslottime(ic, 1); 2414 } 2415 } 2416 } 2417 /* 2418 * If a non-ERP station do the protection-related bookkeeping. 2419 */ 2420 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2421 KASSERT(ic->ic_nonerpsta > 0, 2422 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2423 ic->ic_nonerpsta--; 2424 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2425 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2426 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2427 " (non-ERP sta present)" : ""); 2428 if (ic->ic_nonerpsta == 0 && 2429 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2430 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2431 "%s: disable use of protection\n", __func__); 2432 disable_protection(ic); 2433 } 2434 } 2435 } 2436 2437 /* 2438 * Time out presence of an overlapping bss with non-ERP 2439 * stations. When operating in hostap mode we listen for 2440 * beacons from other stations and if we identify a non-ERP 2441 * station is present we enable protection. To identify 2442 * when all non-ERP stations are gone we time out this 2443 * condition. 2444 */ 2445 static void 2446 ieee80211_erp_timeout(struct ieee80211com *ic) 2447 { 2448 2449 IEEE80211_LOCK_ASSERT(ic); 2450 2451 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2452 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2453 #if 0 2454 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2455 "%s", "age out non-ERP sta present on channel"); 2456 #endif 2457 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2458 if (ic->ic_nonerpsta == 0) 2459 disable_protection(ic); 2460 } 2461 } 2462 2463 /* 2464 * Handle bookkeeping for station deauthentication/disassociation 2465 * when operating as an ap. 2466 */ 2467 void 2468 ieee80211_node_leave(struct ieee80211_node *ni) 2469 { 2470 struct ieee80211com *ic = ni->ni_ic; 2471 struct ieee80211vap *vap = ni->ni_vap; 2472 struct ieee80211_node_table *nt = ni->ni_table; 2473 2474 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2475 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2476 2477 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2478 ("unexpected operating mode %u", vap->iv_opmode)); 2479 /* 2480 * If node wasn't previously associated all 2481 * we need to do is reclaim the reference. 2482 */ 2483 /* XXX ibss mode bypasses 11g and notification */ 2484 if (ni->ni_associd == 0) 2485 goto done; 2486 /* 2487 * Tell the authenticator the station is leaving. 2488 * Note that we must do this before yanking the 2489 * association id as the authenticator uses the 2490 * associd to locate it's state block. 2491 */ 2492 if (vap->iv_auth->ia_node_leave != NULL) 2493 vap->iv_auth->ia_node_leave(ni); 2494 2495 IEEE80211_LOCK(ic); 2496 IEEE80211_AID_CLR(vap, ni->ni_associd); 2497 ni->ni_associd = 0; 2498 vap->iv_sta_assoc--; 2499 ic->ic_sta_assoc--; 2500 2501 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2502 ieee80211_ht_node_leave(ni); 2503 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2504 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2505 ieee80211_node_leave_11g(ni); 2506 IEEE80211_UNLOCK(ic); 2507 /* 2508 * Cleanup station state. In particular clear various 2509 * state that might otherwise be reused if the node 2510 * is reused before the reference count goes to zero 2511 * (and memory is reclaimed). 2512 */ 2513 ieee80211_sta_leave(ni); 2514 done: 2515 /* 2516 * Remove the node from any table it's recorded in and 2517 * drop the caller's reference. Removal from the table 2518 * is important to insure the node is not reprocessed 2519 * for inactivity. 2520 */ 2521 if (nt != NULL) { 2522 IEEE80211_NODE_LOCK(nt); 2523 node_reclaim(nt, ni); 2524 IEEE80211_NODE_UNLOCK(nt); 2525 } else 2526 ieee80211_free_node(ni); 2527 } 2528 2529 struct rssiinfo { 2530 struct ieee80211vap *vap; 2531 int rssi_samples; 2532 uint32_t rssi_total; 2533 }; 2534 2535 static void 2536 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2537 { 2538 struct rssiinfo *info = arg; 2539 struct ieee80211vap *vap = ni->ni_vap; 2540 int8_t rssi; 2541 2542 if (info->vap != vap) 2543 return; 2544 /* only associated stations */ 2545 if (ni->ni_associd == 0) 2546 return; 2547 rssi = vap->iv_ic->ic_node_getrssi(ni); 2548 if (rssi != 0) { 2549 info->rssi_samples++; 2550 info->rssi_total += rssi; 2551 } 2552 } 2553 2554 static void 2555 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2556 { 2557 struct rssiinfo *info = arg; 2558 struct ieee80211vap *vap = ni->ni_vap; 2559 int8_t rssi; 2560 2561 if (info->vap != vap) 2562 return; 2563 /* only neighbors */ 2564 /* XXX check bssid */ 2565 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2566 return; 2567 rssi = vap->iv_ic->ic_node_getrssi(ni); 2568 if (rssi != 0) { 2569 info->rssi_samples++; 2570 info->rssi_total += rssi; 2571 } 2572 } 2573 2574 #ifdef IEEE80211_SUPPORT_MESH 2575 static void 2576 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2577 { 2578 struct rssiinfo *info = arg; 2579 struct ieee80211vap *vap = ni->ni_vap; 2580 int8_t rssi; 2581 2582 if (info->vap != vap) 2583 return; 2584 /* only neighbors that peered successfully */ 2585 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 2586 return; 2587 rssi = vap->iv_ic->ic_node_getrssi(ni); 2588 if (rssi != 0) { 2589 info->rssi_samples++; 2590 info->rssi_total += rssi; 2591 } 2592 } 2593 #endif /* IEEE80211_SUPPORT_MESH */ 2594 2595 int8_t 2596 ieee80211_getrssi(struct ieee80211vap *vap) 2597 { 2598 #define NZ(x) ((x) == 0 ? 1 : (x)) 2599 struct ieee80211com *ic = vap->iv_ic; 2600 struct rssiinfo info; 2601 2602 info.rssi_total = 0; 2603 info.rssi_samples = 0; 2604 info.vap = vap; 2605 switch (vap->iv_opmode) { 2606 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2607 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2608 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2609 break; 2610 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2611 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2612 break; 2613 #ifdef IEEE80211_SUPPORT_MESH 2614 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 2615 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info); 2616 break; 2617 #endif 2618 case IEEE80211_M_MONITOR: /* XXX */ 2619 case IEEE80211_M_STA: /* use stats from associated ap */ 2620 default: 2621 if (vap->iv_bss != NULL) 2622 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2623 info.rssi_samples = 1; 2624 break; 2625 } 2626 return info.rssi_total / NZ(info.rssi_samples); 2627 #undef NZ 2628 } 2629 2630 void 2631 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2632 { 2633 2634 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2635 return; 2636 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2637 /* for non-station mode return avg'd rssi accounting */ 2638 if (vap->iv_opmode != IEEE80211_M_STA) 2639 *rssi = ieee80211_getrssi(vap); 2640 } 2641