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