1 /*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "opt_wlan.h" 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/mbuf.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 38 #include <sys/socket.h> 39 40 #include <net/if.h> 41 #include <net/if_var.h> 42 #include <net/if_media.h> 43 #include <net/ethernet.h> 44 45 #include <net80211/ieee80211_var.h> 46 #include <net80211/ieee80211_input.h> 47 #ifdef IEEE80211_SUPPORT_SUPERG 48 #include <net80211/ieee80211_superg.h> 49 #endif 50 #ifdef IEEE80211_SUPPORT_TDMA 51 #include <net80211/ieee80211_tdma.h> 52 #endif 53 #include <net80211/ieee80211_wds.h> 54 #include <net80211/ieee80211_mesh.h> 55 #include <net80211/ieee80211_ratectl.h> 56 57 #include <net/bpf.h> 58 59 /* 60 * IEEE80211_NODE_HASHSIZE must be a power of 2. 61 */ 62 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 63 64 /* 65 * Association id's are managed with a bit vector. 66 */ 67 #define IEEE80211_AID_SET(_vap, b) \ 68 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 69 (1 << (IEEE80211_AID(b) % 32))) 70 #define IEEE80211_AID_CLR(_vap, b) \ 71 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 72 ~(1 << (IEEE80211_AID(b) % 32))) 73 #define IEEE80211_AID_ISSET(_vap, b) \ 74 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 75 76 static int ieee80211_sta_join1(struct ieee80211_node *); 77 78 static struct ieee80211_node *node_alloc(struct ieee80211vap *, 79 const uint8_t [IEEE80211_ADDR_LEN]); 80 static void node_cleanup(struct ieee80211_node *); 81 static void node_free(struct ieee80211_node *); 82 static void node_age(struct ieee80211_node *); 83 static int8_t node_getrssi(const struct ieee80211_node *); 84 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 85 static void node_getmimoinfo(const struct ieee80211_node *, 86 struct ieee80211_mimo_info *); 87 88 static void _ieee80211_free_node(struct ieee80211_node *); 89 90 static void node_reclaim(struct ieee80211_node_table *nt, 91 struct ieee80211_node *ni); 92 static void ieee80211_node_table_init(struct ieee80211com *ic, 93 struct ieee80211_node_table *nt, const char *name, 94 int inact, int keymaxix); 95 static void ieee80211_node_table_reset(struct ieee80211_node_table *, 96 struct ieee80211vap *); 97 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 98 static void ieee80211_erp_timeout(struct ieee80211com *); 99 100 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 101 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 102 103 void 104 ieee80211_node_attach(struct ieee80211com *ic) 105 { 106 /* XXX really want maxlen enforced per-sta */ 107 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 108 "802.11 staging q"); 109 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 110 IEEE80211_INACT_INIT, ic->ic_max_keyix); 111 callout_init(&ic->ic_inact, 1); 112 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 113 ieee80211_node_timeout, ic); 114 115 ic->ic_node_alloc = node_alloc; 116 ic->ic_node_free = node_free; 117 ic->ic_node_cleanup = node_cleanup; 118 ic->ic_node_age = node_age; 119 ic->ic_node_drain = node_age; /* NB: same as age */ 120 ic->ic_node_getrssi = node_getrssi; 121 ic->ic_node_getsignal = node_getsignal; 122 ic->ic_node_getmimoinfo = node_getmimoinfo; 123 124 /* 125 * Set flags to be propagated to all vap's; 126 * these define default behaviour/configuration. 127 */ 128 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 129 } 130 131 void 132 ieee80211_node_detach(struct ieee80211com *ic) 133 { 134 135 callout_drain(&ic->ic_inact); 136 ieee80211_node_table_cleanup(&ic->ic_sta); 137 ieee80211_ageq_cleanup(&ic->ic_stageq); 138 } 139 140 void 141 ieee80211_node_vattach(struct ieee80211vap *vap) 142 { 143 /* NB: driver can override */ 144 vap->iv_max_aid = IEEE80211_AID_DEF; 145 146 /* default station inactivity timer setings */ 147 vap->iv_inact_init = IEEE80211_INACT_INIT; 148 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 149 vap->iv_inact_run = IEEE80211_INACT_RUN; 150 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 151 152 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 153 "%s: init %u auth %u run %u probe %u\n", __func__, 154 vap->iv_inact_init, vap->iv_inact_auth, 155 vap->iv_inact_run, vap->iv_inact_probe); 156 } 157 158 void 159 ieee80211_node_latevattach(struct ieee80211vap *vap) 160 { 161 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 162 /* XXX should we allow max aid to be zero? */ 163 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 164 vap->iv_max_aid = IEEE80211_AID_MIN; 165 if_printf(vap->iv_ifp, 166 "WARNING: max aid too small, changed to %d\n", 167 vap->iv_max_aid); 168 } 169 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( 170 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 171 M_80211_NODE, 172 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 173 if (vap->iv_aid_bitmap == NULL) { 174 /* XXX no way to recover */ 175 printf("%s: no memory for AID bitmap, max aid %d!\n", 176 __func__, vap->iv_max_aid); 177 vap->iv_max_aid = 0; 178 } 179 } 180 181 ieee80211_reset_bss(vap); 182 183 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 184 } 185 186 void 187 ieee80211_node_vdetach(struct ieee80211vap *vap) 188 { 189 struct ieee80211com *ic = vap->iv_ic; 190 191 ieee80211_node_table_reset(&ic->ic_sta, vap); 192 if (vap->iv_bss != NULL) { 193 ieee80211_free_node(vap->iv_bss); 194 vap->iv_bss = NULL; 195 } 196 if (vap->iv_aid_bitmap != NULL) { 197 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); 198 vap->iv_aid_bitmap = NULL; 199 } 200 } 201 202 /* 203 * Port authorize/unauthorize interfaces for use by an authenticator. 204 */ 205 206 void 207 ieee80211_node_authorize(struct ieee80211_node *ni) 208 { 209 struct ieee80211vap *vap = ni->ni_vap; 210 211 ni->ni_flags |= IEEE80211_NODE_AUTH; 212 ni->ni_inact_reload = vap->iv_inact_run; 213 ni->ni_inact = ni->ni_inact_reload; 214 215 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 216 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 217 } 218 219 void 220 ieee80211_node_unauthorize(struct ieee80211_node *ni) 221 { 222 struct ieee80211vap *vap = ni->ni_vap; 223 224 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 225 ni->ni_inact_reload = vap->iv_inact_auth; 226 if (ni->ni_inact > ni->ni_inact_reload) 227 ni->ni_inact = ni->ni_inact_reload; 228 229 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 230 "%s: inact_reload %u inact %u", __func__, 231 ni->ni_inact_reload, ni->ni_inact); 232 } 233 234 /* 235 * Fix tx parameters for a node according to ``association state''. 236 */ 237 void 238 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 239 { 240 struct ieee80211vap *vap = ni->ni_vap; 241 enum ieee80211_phymode mode; 242 243 if (ni->ni_flags & IEEE80211_NODE_HT) { 244 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 245 mode = IEEE80211_MODE_11NA; 246 else 247 mode = IEEE80211_MODE_11NG; 248 } else { /* legacy rate handling */ 249 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 250 mode = IEEE80211_MODE_STURBO_A; 251 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 252 mode = IEEE80211_MODE_HALF; 253 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 254 mode = IEEE80211_MODE_QUARTER; 255 /* NB: 108A should be handled as 11a */ 256 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 257 mode = IEEE80211_MODE_11A; 258 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 259 (ni->ni_flags & IEEE80211_NODE_ERP)) 260 mode = IEEE80211_MODE_11G; 261 else 262 mode = IEEE80211_MODE_11B; 263 } 264 ni->ni_txparms = &vap->iv_txparms[mode]; 265 } 266 267 /* 268 * Set/change the channel. The rate set is also updated as 269 * to insure a consistent view by drivers. 270 * XXX should be private but hostap needs it to deal with CSA 271 */ 272 void 273 ieee80211_node_set_chan(struct ieee80211_node *ni, 274 struct ieee80211_channel *chan) 275 { 276 struct ieee80211com *ic = ni->ni_ic; 277 struct ieee80211vap *vap = ni->ni_vap; 278 enum ieee80211_phymode mode; 279 280 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 281 282 ni->ni_chan = chan; 283 mode = ieee80211_chan2mode(chan); 284 if (IEEE80211_IS_CHAN_HT(chan)) { 285 /* 286 * We must install the legacy rate est in ni_rates and the 287 * HT rate set in ni_htrates. 288 */ 289 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 290 /* 291 * Setup bss tx parameters based on operating mode. We 292 * use legacy rates when operating in a mixed HT+non-HT bss 293 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 294 */ 295 if (mode == IEEE80211_MODE_11NA && 296 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 297 mode = IEEE80211_MODE_11A; 298 else if (mode == IEEE80211_MODE_11NG && 299 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 300 mode = IEEE80211_MODE_11G; 301 if (mode == IEEE80211_MODE_11G && 302 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 303 mode = IEEE80211_MODE_11B; 304 } 305 ni->ni_txparms = &vap->iv_txparms[mode]; 306 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 307 } 308 309 static __inline void 310 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 311 { 312 /* propagate useful state */ 313 nbss->ni_authmode = obss->ni_authmode; 314 nbss->ni_txpower = obss->ni_txpower; 315 nbss->ni_vlan = obss->ni_vlan; 316 /* XXX statistics? */ 317 /* XXX legacy WDS bssid? */ 318 } 319 320 void 321 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 322 { 323 struct ieee80211com *ic = vap->iv_ic; 324 struct ieee80211_node *ni; 325 326 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 327 "%s: creating %s on channel %u%c flags 0x%08x\n", __func__, 328 ieee80211_opmode_name[vap->iv_opmode], 329 ieee80211_chan2ieee(ic, chan), 330 ieee80211_channel_type_char(chan), 331 chan->ic_flags); 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 /* XXX TODO: other bits and pieces - eg fast-frames? */ 413 414 /* If we're an 11n channel then initialise the 11n bits */ 415 if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 416 /* XXX what else? */ 417 ieee80211_ht_node_init(ni); 418 } 419 420 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 421 } 422 423 /* 424 * Reset bss state on transition to the INIT state. 425 * Clear any stations from the table (they have been 426 * deauth'd) and reset the bss node (clears key, rate 427 * etc. state). 428 */ 429 void 430 ieee80211_reset_bss(struct ieee80211vap *vap) 431 { 432 struct ieee80211com *ic = vap->iv_ic; 433 struct ieee80211_node *ni, *obss; 434 435 ieee80211_node_table_reset(&ic->ic_sta, vap); 436 /* XXX multi-bss: wrong */ 437 ieee80211_reset_erp(ic); 438 439 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 440 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 441 obss = vap->iv_bss; 442 vap->iv_bss = ieee80211_ref_node(ni); 443 if (obss != NULL) { 444 copy_bss(ni, obss); 445 ni->ni_intval = ic->ic_bintval; 446 ieee80211_free_node(obss); 447 } else 448 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 449 } 450 451 static int 452 match_ssid(const struct ieee80211_node *ni, 453 int nssid, const struct ieee80211_scan_ssid ssids[]) 454 { 455 int i; 456 457 for (i = 0; i < nssid; i++) { 458 if (ni->ni_esslen == ssids[i].len && 459 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 460 return 1; 461 } 462 return 0; 463 } 464 465 /* 466 * Test a node for suitability/compatibility. 467 */ 468 static int 469 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 470 { 471 struct ieee80211com *ic = ni->ni_ic; 472 uint8_t rate; 473 474 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 475 return 0; 476 if (vap->iv_opmode == IEEE80211_M_IBSS) { 477 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 478 return 0; 479 } else { 480 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 481 return 0; 482 } 483 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 484 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 485 return 0; 486 } else { 487 /* XXX does this mean privacy is supported or required? */ 488 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 489 return 0; 490 } 491 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 492 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 493 if (rate & IEEE80211_RATE_BASIC) 494 return 0; 495 if (vap->iv_des_nssid != 0 && 496 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 497 return 0; 498 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 499 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 500 return 0; 501 return 1; 502 } 503 504 #ifdef IEEE80211_DEBUG 505 /* 506 * Display node suitability/compatibility. 507 */ 508 static void 509 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 510 { 511 struct ieee80211com *ic = ni->ni_ic; 512 uint8_t rate; 513 int fail; 514 515 fail = 0; 516 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 517 fail |= 0x01; 518 if (vap->iv_opmode == IEEE80211_M_IBSS) { 519 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 520 fail |= 0x02; 521 } else { 522 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 523 fail |= 0x02; 524 } 525 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 526 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 527 fail |= 0x04; 528 } else { 529 /* XXX does this mean privacy is supported or required? */ 530 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 531 fail |= 0x04; 532 } 533 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 534 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 535 if (rate & IEEE80211_RATE_BASIC) 536 fail |= 0x08; 537 if (vap->iv_des_nssid != 0 && 538 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 539 fail |= 0x10; 540 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 541 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 542 fail |= 0x20; 543 544 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 545 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 546 printf(" %3d%c", 547 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 548 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 549 fail & 0x08 ? '!' : ' '); 550 printf(" %4s%c", 551 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 552 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 553 "????", 554 fail & 0x02 ? '!' : ' '); 555 printf(" %3s%c ", 556 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 557 fail & 0x04 ? '!' : ' '); 558 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 559 printf("%s\n", fail & 0x10 ? "!" : ""); 560 } 561 #endif /* IEEE80211_DEBUG */ 562 563 564 int 565 ieee80211_ibss_merge_check(struct ieee80211_node *ni) 566 { 567 struct ieee80211vap *vap = ni->ni_vap; 568 569 if (ni == vap->iv_bss || 570 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 571 /* unchanged, nothing to do */ 572 return 0; 573 } 574 575 if (!check_bss(vap, ni)) { 576 /* capabilities mismatch */ 577 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 578 "%s: merge failed, capabilities mismatch\n", __func__); 579 #ifdef IEEE80211_DEBUG 580 if (ieee80211_msg_assoc(vap)) 581 check_bss_debug(vap, ni); 582 #endif 583 vap->iv_stats.is_ibss_capmismatch++; 584 return 0; 585 } 586 587 return 1; 588 } 589 590 /* 591 * Check if the given node should populate the node table. 592 * 593 * We need to be in "see all beacons for all ssids" mode in order 594 * to do IBSS merges, however this means we will populate nodes for 595 * /all/ IBSS SSIDs, versus just the one we care about. 596 * 597 * So this check ensures the node can actually belong to our IBSS 598 * configuration. For now it simply checks the SSID. 599 */ 600 int 601 ieee80211_ibss_node_check_new(struct ieee80211_node *ni, 602 const struct ieee80211_scanparams *scan) 603 { 604 struct ieee80211vap *vap = ni->ni_vap; 605 int i; 606 607 /* 608 * If we have no SSID and no scan SSID, return OK. 609 */ 610 if (vap->iv_des_nssid == 0 && scan->ssid == NULL) 611 goto ok; 612 613 /* 614 * If we have one of (SSID, scan SSID) then return error. 615 */ 616 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL)) 617 goto mismatch; 618 619 /* 620 * Double-check - we need scan SSID. 621 */ 622 if (scan->ssid == NULL) 623 goto mismatch; 624 625 /* 626 * Check if the scan SSID matches the SSID list for the VAP. 627 */ 628 for (i = 0; i < vap->iv_des_nssid; i++) { 629 630 /* Sanity length check */ 631 if (vap->iv_des_ssid[i].len != scan->ssid[1]) 632 continue; 633 634 /* Note: SSID in the scan entry is the IE format */ 635 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2, 636 vap->iv_des_ssid[i].len) == 0) 637 goto ok; 638 } 639 640 mismatch: 641 return (0); 642 ok: 643 return (1); 644 } 645 646 /* 647 * Handle 802.11 ad hoc network merge. The 648 * convention, set by the Wireless Ethernet Compatibility Alliance 649 * (WECA), is that an 802.11 station will change its BSSID to match 650 * the "oldest" 802.11 ad hoc network, on the same channel, that 651 * has the station's desired SSID. The "oldest" 802.11 network 652 * sends beacons with the greatest TSF timestamp. 653 * 654 * The caller is assumed to validate TSF's before attempting a merge. 655 * 656 * Return !0 if the BSSID changed, 0 otherwise. 657 */ 658 int 659 ieee80211_ibss_merge(struct ieee80211_node *ni) 660 { 661 #ifdef IEEE80211_DEBUG 662 struct ieee80211vap *vap = ni->ni_vap; 663 struct ieee80211com *ic = ni->ni_ic; 664 #endif 665 666 if (! ieee80211_ibss_merge_check(ni)) 667 return 0; 668 669 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 670 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 671 ether_sprintf(ni->ni_bssid), 672 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 673 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 674 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 675 ); 676 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 677 } 678 679 /* 680 * Calculate HT channel promotion flags for all vaps. 681 * This assumes ni_chan have been setup for each vap. 682 */ 683 static int 684 gethtadjustflags(struct ieee80211com *ic) 685 { 686 struct ieee80211vap *vap; 687 int flags; 688 689 flags = 0; 690 /* XXX locking */ 691 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 692 if (vap->iv_state < IEEE80211_S_RUN) 693 continue; 694 switch (vap->iv_opmode) { 695 case IEEE80211_M_WDS: 696 case IEEE80211_M_STA: 697 case IEEE80211_M_AHDEMO: 698 case IEEE80211_M_HOSTAP: 699 case IEEE80211_M_IBSS: 700 case IEEE80211_M_MBSS: 701 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 702 break; 703 default: 704 break; 705 } 706 } 707 return flags; 708 } 709 710 /* 711 * Check if the current channel needs to change based on whether 712 * any vap's are using HT20/HT40. This is used to sync the state 713 * of ic_curchan after a channel width change on a running vap. 714 */ 715 void 716 ieee80211_sync_curchan(struct ieee80211com *ic) 717 { 718 struct ieee80211_channel *c; 719 720 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 721 if (c != ic->ic_curchan) { 722 ic->ic_curchan = c; 723 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 724 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 725 IEEE80211_UNLOCK(ic); 726 ic->ic_set_channel(ic); 727 ieee80211_radiotap_chan_change(ic); 728 IEEE80211_LOCK(ic); 729 } 730 } 731 732 /* 733 * Setup the current channel. The request channel may be 734 * promoted if other vap's are operating with HT20/HT40. 735 */ 736 void 737 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 738 { 739 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 740 int flags = gethtadjustflags(ic); 741 /* 742 * Check for channel promotion required to support the 743 * set of running vap's. This assumes we are called 744 * after ni_chan is setup for each vap. 745 */ 746 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 747 if (flags > ieee80211_htchanflags(c)) 748 c = ieee80211_ht_adjust_channel(ic, c, flags); 749 } 750 ic->ic_bsschan = ic->ic_curchan = c; 751 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 752 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 753 } 754 755 /* 756 * Change the current channel. The channel change is guaranteed to have 757 * happened before the next state change. 758 */ 759 void 760 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 761 { 762 ieee80211_setupcurchan(ic, c); 763 ieee80211_runtask(ic, &ic->ic_chan_task); 764 } 765 766 void 767 ieee80211_update_chw(struct ieee80211com *ic) 768 { 769 770 ieee80211_setupcurchan(ic, ic->ic_curchan); 771 ieee80211_runtask(ic, &ic->ic_chw_task); 772 } 773 774 /* 775 * Join the specified IBSS/BSS network. The node is assumed to 776 * be passed in with a held reference. 777 */ 778 static int 779 ieee80211_sta_join1(struct ieee80211_node *selbs) 780 { 781 struct ieee80211vap *vap = selbs->ni_vap; 782 struct ieee80211com *ic = selbs->ni_ic; 783 struct ieee80211_node *obss; 784 int canreassoc; 785 786 /* 787 * Committed to selbs, setup state. 788 */ 789 obss = vap->iv_bss; 790 /* 791 * Check if old+new node have the same address in which 792 * case we can reassociate when operating in sta mode. 793 */ 794 canreassoc = (obss != NULL && 795 vap->iv_state == IEEE80211_S_RUN && 796 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 797 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 798 if (obss != NULL) { 799 struct ieee80211_node_table *nt = obss->ni_table; 800 801 copy_bss(selbs, obss); 802 ieee80211_node_decref(obss); /* iv_bss reference */ 803 804 IEEE80211_NODE_LOCK(nt); 805 node_reclaim(nt, obss); /* station table reference */ 806 IEEE80211_NODE_UNLOCK(nt); 807 808 obss = NULL; /* NB: guard against later use */ 809 } 810 811 /* 812 * Delete unusable rates; we've already checked 813 * that the negotiated rate set is acceptable. 814 */ 815 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 816 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 817 818 ieee80211_setcurchan(ic, selbs->ni_chan); 819 /* 820 * Set the erp state (mostly the slot time) to deal with 821 * the auto-select case; this should be redundant if the 822 * mode is locked. 823 */ 824 ieee80211_reset_erp(ic); 825 ieee80211_wme_initparams(vap); 826 827 if (vap->iv_opmode == IEEE80211_M_STA) { 828 if (canreassoc) { 829 /* Reassociate */ 830 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 831 } else { 832 /* 833 * Act as if we received a DEAUTH frame in case we 834 * are invoked from the RUN state. This will cause 835 * us to try to re-authenticate if we are operating 836 * as a station. 837 */ 838 ieee80211_new_state(vap, IEEE80211_S_AUTH, 839 IEEE80211_FC0_SUBTYPE_DEAUTH); 840 } 841 } else 842 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 843 return 1; 844 } 845 846 int 847 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 848 const struct ieee80211_scan_entry *se) 849 { 850 struct ieee80211com *ic = vap->iv_ic; 851 struct ieee80211_node *ni; 852 853 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 854 if (ni == NULL) { 855 /* XXX msg */ 856 return 0; 857 } 858 859 /* 860 * Expand scan state into node's format. 861 * XXX may not need all this stuff 862 */ 863 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 864 ni->ni_esslen = se->se_ssid[1]; 865 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 866 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 867 ni->ni_intval = se->se_intval; 868 ni->ni_capinfo = se->se_capinfo; 869 ni->ni_chan = chan; 870 ni->ni_timoff = se->se_timoff; 871 ni->ni_fhdwell = se->se_fhdwell; 872 ni->ni_fhindex = se->se_fhindex; 873 ni->ni_erp = se->se_erp; 874 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 875 ni->ni_noise = se->se_noise; 876 if (vap->iv_opmode == IEEE80211_M_STA) { 877 /* NB: only infrastructure mode requires an associd */ 878 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 879 } 880 881 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 882 ieee80211_ies_expand(&ni->ni_ies); 883 #ifdef IEEE80211_SUPPORT_SUPERG 884 if (ni->ni_ies.ath_ie != NULL) 885 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 886 #endif 887 if (ni->ni_ies.htcap_ie != NULL) 888 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 889 if (ni->ni_ies.htinfo_ie != NULL) 890 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 891 #ifdef IEEE80211_SUPPORT_MESH 892 if (ni->ni_ies.meshid_ie != NULL) 893 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 894 #endif 895 #ifdef IEEE80211_SUPPORT_TDMA 896 if (ni->ni_ies.tdma_ie != NULL) 897 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 898 #endif 899 900 /* XXX parse VHT IEs */ 901 /* XXX parse BSSLOAD IE */ 902 /* XXX parse APCHANREP IE */ 903 } 904 905 vap->iv_dtim_period = se->se_dtimperiod; 906 vap->iv_dtim_count = 0; 907 908 /* NB: must be after ni_chan is setup */ 909 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 910 IEEE80211_F_DOSORT); 911 if (ieee80211_iserp_rateset(&ni->ni_rates)) 912 ni->ni_flags |= IEEE80211_NODE_ERP; 913 914 /* 915 * Setup HT state for this node if it's available, otherwise 916 * non-STA modes won't pick this state up. 917 * 918 * For IBSS and related modes that don't go through an 919 * association request/response, the only appropriate place 920 * to setup the HT state is here. 921 */ 922 if (ni->ni_ies.htinfo_ie != NULL && 923 ni->ni_ies.htcap_ie != NULL && 924 vap->iv_flags_ht & IEEE80211_FHT_HT) { 925 ieee80211_ht_node_init(ni); 926 ieee80211_ht_updateparams(ni, 927 ni->ni_ies.htcap_ie, 928 ni->ni_ies.htinfo_ie); 929 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 930 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 931 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 932 } 933 /* XXX else check for ath FF? */ 934 /* XXX QoS? Difficult given that WME config is specific to a master */ 935 936 ieee80211_node_setuptxparms(ni); 937 ieee80211_ratectl_node_init(ni); 938 939 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 940 } 941 942 /* 943 * Leave the specified IBSS/BSS network. The node is assumed to 944 * be passed in with a held reference. 945 */ 946 void 947 ieee80211_sta_leave(struct ieee80211_node *ni) 948 { 949 struct ieee80211com *ic = ni->ni_ic; 950 951 ic->ic_node_cleanup(ni); 952 ieee80211_notify_node_leave(ni); 953 } 954 955 /* 956 * Send a deauthenticate frame and drop the station. 957 */ 958 void 959 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 960 { 961 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 962 ieee80211_ref_node(ni); 963 if (ni->ni_associd != 0) 964 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 965 ieee80211_node_leave(ni); 966 ieee80211_free_node(ni); 967 } 968 969 static struct ieee80211_node * 970 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 971 { 972 struct ieee80211_node *ni; 973 974 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), 975 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 976 return ni; 977 } 978 979 /* 980 * Initialize an ie blob with the specified data. If previous 981 * data exists re-use the data block. As a side effect we clear 982 * all references to specific ie's; the caller is required to 983 * recalculate them. 984 */ 985 int 986 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 987 { 988 /* NB: assumes data+len are the last fields */ 989 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 990 if (ies->data != NULL && ies->len != len) { 991 /* data size changed */ 992 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 993 ies->data = NULL; 994 } 995 if (ies->data == NULL) { 996 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 997 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 998 if (ies->data == NULL) { 999 ies->len = 0; 1000 /* NB: pointers have already been zero'd above */ 1001 return 0; 1002 } 1003 } 1004 memcpy(ies->data, data, len); 1005 ies->len = len; 1006 return 1; 1007 } 1008 1009 /* 1010 * Reclaim storage for an ie blob. 1011 */ 1012 void 1013 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 1014 { 1015 if (ies->data != NULL) 1016 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1017 } 1018 1019 /* 1020 * Expand an ie blob data contents and to fillin individual 1021 * ie pointers. The data blob is assumed to be well-formed; 1022 * we don't do any validity checking of ie lengths. 1023 */ 1024 void 1025 ieee80211_ies_expand(struct ieee80211_ies *ies) 1026 { 1027 uint8_t *ie; 1028 int ielen; 1029 1030 ie = ies->data; 1031 ielen = ies->len; 1032 while (ielen > 0) { 1033 switch (ie[0]) { 1034 case IEEE80211_ELEMID_VENDOR: 1035 if (iswpaoui(ie)) 1036 ies->wpa_ie = ie; 1037 else if (iswmeoui(ie)) 1038 ies->wme_ie = ie; 1039 #ifdef IEEE80211_SUPPORT_SUPERG 1040 else if (isatherosoui(ie)) 1041 ies->ath_ie = ie; 1042 #endif 1043 #ifdef IEEE80211_SUPPORT_TDMA 1044 else if (istdmaoui(ie)) 1045 ies->tdma_ie = ie; 1046 #endif 1047 break; 1048 case IEEE80211_ELEMID_RSN: 1049 ies->rsn_ie = ie; 1050 break; 1051 case IEEE80211_ELEMID_HTCAP: 1052 ies->htcap_ie = ie; 1053 break; 1054 case IEEE80211_ELEMID_HTINFO: 1055 ies->htinfo_ie = ie; 1056 break; 1057 #ifdef IEEE80211_SUPPORT_MESH 1058 case IEEE80211_ELEMID_MESHID: 1059 ies->meshid_ie = ie; 1060 break; 1061 #endif 1062 case IEEE80211_ELEMID_VHT_CAP: 1063 ies->vhtcap_ie = ie; 1064 break; 1065 case IEEE80211_ELEMID_VHT_OPMODE: 1066 ies->vhtopmode_ie = ie; 1067 break; 1068 case IEEE80211_ELEMID_VHT_PWR_ENV: 1069 ies->vhtpwrenv_ie = ie; 1070 break; 1071 case IEEE80211_ELEMID_BSSLOAD: 1072 ies->bssload_ie = ie; 1073 break; 1074 case IEEE80211_ELEMID_APCHANREP: 1075 ies->apchanrep_ie = ie; 1076 break; 1077 } 1078 ielen -= 2 + ie[1]; 1079 ie += 2 + ie[1]; 1080 } 1081 } 1082 1083 /* 1084 * Reclaim any resources in a node and reset any critical 1085 * state. Typically nodes are free'd immediately after, 1086 * but in some cases the storage may be reused so we need 1087 * to insure consistent state (should probably fix that). 1088 */ 1089 static void 1090 node_cleanup(struct ieee80211_node *ni) 1091 { 1092 struct ieee80211vap *vap = ni->ni_vap; 1093 struct ieee80211com *ic = ni->ni_ic; 1094 int i; 1095 1096 /* NB: preserve ni_table */ 1097 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1098 if (vap->iv_opmode != IEEE80211_M_STA) 1099 vap->iv_ps_sta--; 1100 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1101 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1102 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1103 } 1104 /* 1105 * Cleanup any HT-related state. 1106 */ 1107 if (ni->ni_flags & IEEE80211_NODE_HT) 1108 ieee80211_ht_node_cleanup(ni); 1109 #ifdef IEEE80211_SUPPORT_SUPERG 1110 /* Always do FF node cleanup; for A-MSDU */ 1111 ieee80211_ff_node_cleanup(ni); 1112 #endif 1113 #ifdef IEEE80211_SUPPORT_MESH 1114 /* 1115 * Cleanup any mesh-related state. 1116 */ 1117 if (vap->iv_opmode == IEEE80211_M_MBSS) 1118 ieee80211_mesh_node_cleanup(ni); 1119 #endif 1120 /* 1121 * Clear any staging queue entries. 1122 */ 1123 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1124 1125 /* 1126 * Clear AREF flag that marks the authorization refcnt bump 1127 * has happened. This is probably not needed as the node 1128 * should always be removed from the table so not found but 1129 * do it just in case. 1130 * Likewise clear the ASSOCID flag as these flags are intended 1131 * to be managed in tandem. 1132 */ 1133 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1134 1135 /* 1136 * Drain power save queue and, if needed, clear TIM. 1137 */ 1138 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1139 vap->iv_set_tim(ni, 0); 1140 1141 ni->ni_associd = 0; 1142 if (ni->ni_challenge != NULL) { 1143 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1144 ni->ni_challenge = NULL; 1145 } 1146 /* 1147 * Preserve SSID, WPA, and WME ie's so the bss node is 1148 * reusable during a re-auth/re-assoc state transition. 1149 * If we remove these data they will not be recreated 1150 * because they come from a probe-response or beacon frame 1151 * which cannot be expected prior to the association-response. 1152 * This should not be an issue when operating in other modes 1153 * as stations leaving always go through a full state transition 1154 * which will rebuild this state. 1155 * 1156 * XXX does this leave us open to inheriting old state? 1157 */ 1158 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1159 if (ni->ni_rxfrag[i] != NULL) { 1160 m_freem(ni->ni_rxfrag[i]); 1161 ni->ni_rxfrag[i] = NULL; 1162 } 1163 /* 1164 * Must be careful here to remove any key map entry w/o a LOR. 1165 */ 1166 ieee80211_node_delucastkey(ni); 1167 } 1168 1169 static void 1170 node_free(struct ieee80211_node *ni) 1171 { 1172 struct ieee80211com *ic = ni->ni_ic; 1173 1174 ieee80211_ratectl_node_deinit(ni); 1175 ic->ic_node_cleanup(ni); 1176 ieee80211_ies_cleanup(&ni->ni_ies); 1177 ieee80211_psq_cleanup(&ni->ni_psq); 1178 IEEE80211_FREE(ni, M_80211_NODE); 1179 } 1180 1181 static void 1182 node_age(struct ieee80211_node *ni) 1183 { 1184 struct ieee80211vap *vap = ni->ni_vap; 1185 1186 /* 1187 * Age frames on the power save queue. 1188 */ 1189 if (ieee80211_node_psq_age(ni) != 0 && 1190 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1191 vap->iv_set_tim(ni, 0); 1192 /* 1193 * Age out HT resources (e.g. frames on the 1194 * A-MPDU reorder queues). 1195 */ 1196 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1197 ieee80211_ht_node_age(ni); 1198 } 1199 1200 static int8_t 1201 node_getrssi(const struct ieee80211_node *ni) 1202 { 1203 uint32_t avgrssi = ni->ni_avgrssi; 1204 int32_t rssi; 1205 1206 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1207 return 0; 1208 rssi = IEEE80211_RSSI_GET(avgrssi); 1209 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1210 } 1211 1212 static void 1213 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1214 { 1215 *rssi = node_getrssi(ni); 1216 *noise = ni->ni_noise; 1217 } 1218 1219 static void 1220 node_getmimoinfo(const struct ieee80211_node *ni, 1221 struct ieee80211_mimo_info *info) 1222 { 1223 int i; 1224 uint32_t avgrssi; 1225 int32_t rssi; 1226 1227 bzero(info, sizeof(*info)); 1228 1229 for (i = 0; i < ni->ni_mimo_chains; i++) { 1230 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1231 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1232 info->rssi[i] = 0; 1233 } else { 1234 rssi = IEEE80211_RSSI_GET(avgrssi); 1235 info->rssi[i] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1236 } 1237 info->noise[i] = ni->ni_mimo_noise_ctl[i]; 1238 } 1239 1240 /* XXX ext radios? */ 1241 1242 /* XXX EVM? */ 1243 } 1244 1245 static void 1246 ieee80211_add_node_nt(struct ieee80211_node_table *nt, 1247 struct ieee80211_node *ni) 1248 { 1249 struct ieee80211com *ic = nt->nt_ic; 1250 int hash; 1251 1252 IEEE80211_NODE_LOCK_ASSERT(nt); 1253 1254 hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr); 1255 (void) ic; /* XXX IEEE80211_NODE_HASH */ 1256 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1257 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1258 nt->nt_count++; 1259 ni->ni_table = nt; 1260 } 1261 1262 static void 1263 ieee80211_del_node_nt(struct ieee80211_node_table *nt, 1264 struct ieee80211_node *ni) 1265 { 1266 1267 IEEE80211_NODE_LOCK_ASSERT(nt); 1268 1269 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1270 LIST_REMOVE(ni, ni_hash); 1271 nt->nt_count--; 1272 KASSERT(nt->nt_count >= 0, 1273 ("nt_count is negative (%d)!\n", nt->nt_count)); 1274 ni->ni_table = NULL; 1275 } 1276 1277 struct ieee80211_node * 1278 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1279 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1280 { 1281 struct ieee80211com *ic = nt->nt_ic; 1282 struct ieee80211_node *ni; 1283 1284 ni = ic->ic_node_alloc(vap, macaddr); 1285 if (ni == NULL) { 1286 vap->iv_stats.is_rx_nodealloc++; 1287 return NULL; 1288 } 1289 1290 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1291 "%s %p<%s> in %s table\n", __func__, ni, 1292 ether_sprintf(macaddr), nt->nt_name); 1293 1294 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1295 ieee80211_node_initref(ni); /* mark referenced */ 1296 ni->ni_chan = IEEE80211_CHAN_ANYC; 1297 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1298 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1299 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1300 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1301 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1302 ni->ni_inact_reload = nt->nt_inact_init; 1303 ni->ni_inact = ni->ni_inact_reload; 1304 ni->ni_ath_defkeyix = 0x7fff; 1305 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1306 #ifdef IEEE80211_SUPPORT_MESH 1307 if (vap->iv_opmode == IEEE80211_M_MBSS) 1308 ieee80211_mesh_node_init(vap, ni); 1309 #endif 1310 IEEE80211_NODE_LOCK(nt); 1311 ieee80211_add_node_nt(nt, ni); 1312 ni->ni_vap = vap; 1313 ni->ni_ic = ic; 1314 IEEE80211_NODE_UNLOCK(nt); 1315 1316 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1317 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1318 1319 ieee80211_ratectl_node_init(ni); 1320 1321 return ni; 1322 } 1323 1324 /* 1325 * Craft a temporary node suitable for sending a management frame 1326 * to the specified station. We craft only as much state as we 1327 * need to do the work since the node will be immediately reclaimed 1328 * once the send completes. 1329 */ 1330 struct ieee80211_node * 1331 ieee80211_tmp_node(struct ieee80211vap *vap, 1332 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1333 { 1334 struct ieee80211com *ic = vap->iv_ic; 1335 struct ieee80211_node *ni; 1336 1337 ni = ic->ic_node_alloc(vap, macaddr); 1338 if (ni != NULL) { 1339 struct ieee80211_node *bss = vap->iv_bss; 1340 1341 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1342 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1343 1344 ni->ni_table = NULL; /* NB: pedantic */ 1345 ni->ni_ic = ic; /* NB: needed to set channel */ 1346 ni->ni_vap = vap; 1347 1348 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1349 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1350 ieee80211_node_initref(ni); /* mark referenced */ 1351 /* NB: required by ieee80211_fix_rate */ 1352 ieee80211_node_set_chan(ni, bss->ni_chan); 1353 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1354 IEEE80211_KEYIX_NONE); 1355 ni->ni_txpower = bss->ni_txpower; 1356 /* XXX optimize away */ 1357 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1358 1359 ieee80211_ratectl_node_init(ni); 1360 } else { 1361 /* XXX msg */ 1362 vap->iv_stats.is_rx_nodealloc++; 1363 } 1364 return ni; 1365 } 1366 1367 struct ieee80211_node * 1368 ieee80211_dup_bss(struct ieee80211vap *vap, 1369 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1370 { 1371 struct ieee80211com *ic = vap->iv_ic; 1372 struct ieee80211_node *ni; 1373 1374 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1375 if (ni != NULL) { 1376 struct ieee80211_node *bss = vap->iv_bss; 1377 /* 1378 * Inherit from iv_bss. 1379 */ 1380 copy_bss(ni, bss); 1381 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1382 ieee80211_node_set_chan(ni, bss->ni_chan); 1383 } 1384 return ni; 1385 } 1386 1387 /* 1388 * Create a bss node for a legacy WDS vap. The far end does 1389 * not associate so we just create create a new node and 1390 * simulate an association. The caller is responsible for 1391 * installing the node as the bss node and handling any further 1392 * setup work like authorizing the port. 1393 */ 1394 struct ieee80211_node * 1395 ieee80211_node_create_wds(struct ieee80211vap *vap, 1396 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1397 { 1398 struct ieee80211com *ic = vap->iv_ic; 1399 struct ieee80211_node *ni; 1400 1401 /* XXX check if node already in sta table? */ 1402 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1403 if (ni != NULL) { 1404 ni->ni_wdsvap = vap; 1405 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1406 /* 1407 * Inherit any manually configured settings. 1408 */ 1409 copy_bss(ni, vap->iv_bss); 1410 ieee80211_node_set_chan(ni, chan); 1411 /* NB: propagate ssid so available to WPA supplicant */ 1412 ni->ni_esslen = vap->iv_des_ssid[0].len; 1413 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1414 /* NB: no associd for peer */ 1415 /* 1416 * There are no management frames to use to 1417 * discover neighbor capabilities, so blindly 1418 * propagate the local configuration. 1419 */ 1420 if (vap->iv_flags & IEEE80211_F_WME) 1421 ni->ni_flags |= IEEE80211_NODE_QOS; 1422 #ifdef IEEE80211_SUPPORT_SUPERG 1423 if (vap->iv_flags & IEEE80211_F_FF) 1424 ni->ni_flags |= IEEE80211_NODE_FF; 1425 #endif 1426 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1427 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1428 /* 1429 * Device is HT-capable and HT is enabled for 1430 * the vap; setup HT operation. On return 1431 * ni_chan will be adjusted to an HT channel. 1432 */ 1433 ieee80211_ht_wds_init(ni); 1434 } else { 1435 struct ieee80211_channel *c = ni->ni_chan; 1436 /* 1437 * Force a legacy channel to be used. 1438 */ 1439 c = ieee80211_find_channel(ic, 1440 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1441 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1442 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1443 ni->ni_chan = c; 1444 } 1445 } 1446 return ni; 1447 } 1448 1449 struct ieee80211_node * 1450 #ifdef IEEE80211_DEBUG_REFCNT 1451 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1452 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1453 #else 1454 ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1455 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1456 #endif 1457 { 1458 struct ieee80211_node *ni; 1459 int hash; 1460 1461 IEEE80211_NODE_LOCK_ASSERT(nt); 1462 1463 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1464 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1465 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1466 ieee80211_ref_node(ni); /* mark referenced */ 1467 #ifdef IEEE80211_DEBUG_REFCNT 1468 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1469 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1470 func, line, 1471 ni, ether_sprintf(ni->ni_macaddr), 1472 ieee80211_node_refcnt(ni)); 1473 #endif 1474 return ni; 1475 } 1476 } 1477 return NULL; 1478 } 1479 1480 struct ieee80211_node * 1481 #ifdef IEEE80211_DEBUG_REFCNT 1482 ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1483 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1484 #else 1485 ieee80211_find_node(struct ieee80211_node_table *nt, 1486 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1487 #endif 1488 { 1489 struct ieee80211_node *ni; 1490 1491 IEEE80211_NODE_LOCK(nt); 1492 ni = ieee80211_find_node_locked(nt, macaddr); 1493 IEEE80211_NODE_UNLOCK(nt); 1494 return ni; 1495 } 1496 1497 struct ieee80211_node * 1498 #ifdef IEEE80211_DEBUG_REFCNT 1499 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1500 const struct ieee80211vap *vap, 1501 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1502 #else 1503 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1504 const struct ieee80211vap *vap, 1505 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1506 #endif 1507 { 1508 struct ieee80211_node *ni; 1509 int hash; 1510 1511 IEEE80211_NODE_LOCK_ASSERT(nt); 1512 1513 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1514 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1515 if (ni->ni_vap == vap && 1516 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1517 ieee80211_ref_node(ni); /* mark referenced */ 1518 #ifdef IEEE80211_DEBUG_REFCNT 1519 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1520 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1521 func, line, 1522 ni, ether_sprintf(ni->ni_macaddr), 1523 ieee80211_node_refcnt(ni)); 1524 #endif 1525 return ni; 1526 } 1527 } 1528 return NULL; 1529 } 1530 1531 struct ieee80211_node * 1532 #ifdef IEEE80211_DEBUG_REFCNT 1533 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1534 const struct ieee80211vap *vap, 1535 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1536 #else 1537 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1538 const struct ieee80211vap *vap, 1539 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1540 #endif 1541 { 1542 struct ieee80211_node *ni; 1543 1544 IEEE80211_NODE_LOCK(nt); 1545 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1546 IEEE80211_NODE_UNLOCK(nt); 1547 return ni; 1548 } 1549 1550 /* 1551 * Fake up a node; this handles node discovery in adhoc mode. 1552 * Note that for the driver's benefit we we treat this like 1553 * an association so the driver has an opportunity to setup 1554 * it's private state. 1555 */ 1556 struct ieee80211_node * 1557 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1558 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1559 { 1560 struct ieee80211_node *ni; 1561 1562 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1563 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1564 ni = ieee80211_dup_bss(vap, macaddr); 1565 if (ni != NULL) { 1566 struct ieee80211com *ic = vap->iv_ic; 1567 1568 /* XXX no rate negotiation; just dup */ 1569 ni->ni_rates = vap->iv_bss->ni_rates; 1570 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1571 ni->ni_flags |= IEEE80211_NODE_ERP; 1572 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1573 /* 1574 * In adhoc demo mode there are no management 1575 * frames to use to discover neighbor capabilities, 1576 * so blindly propagate the local configuration 1577 * so we can do interesting things (e.g. use 1578 * WME to disable ACK's). 1579 */ 1580 /* 1581 * XXX TODO: 11n? 1582 */ 1583 if (vap->iv_flags & IEEE80211_F_WME) 1584 ni->ni_flags |= IEEE80211_NODE_QOS; 1585 #ifdef IEEE80211_SUPPORT_SUPERG 1586 if (vap->iv_flags & IEEE80211_F_FF) 1587 ni->ni_flags |= IEEE80211_NODE_FF; 1588 #endif 1589 } 1590 ieee80211_node_setuptxparms(ni); 1591 ieee80211_ratectl_node_init(ni); 1592 1593 /* 1594 * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX, 1595 * not A-MPDU TX; not 11n rates, etc. We'll cycle 1596 * that after we hear that we can indeed do 11n 1597 * (either by a beacon frame or by a probe response.) 1598 */ 1599 1600 /* 1601 * This is the first time we see the node. 1602 */ 1603 if (ic->ic_newassoc != NULL) 1604 ic->ic_newassoc(ni, 1); 1605 1606 /* 1607 * Kick off a probe request to the given node; 1608 * we will then use the probe response to update 1609 * 11n/etc configuration state. 1610 * 1611 * XXX TODO: this isn't guaranteed, and until we get 1612 * a probe response, we won't be able to actually 1613 * do anything 802.11n related to the node. 1614 * So if this does indeed work, maybe we should hold 1615 * off on sending responses until we get the probe 1616 * response, or just default to some sensible subset 1617 * of 802.11n behaviour (eg always allow aggregation 1618 * negotiation TO us, but not FROM us, etc) so we 1619 * aren't entirely busted. 1620 */ 1621 if (vap->iv_opmode == IEEE80211_M_IBSS) { 1622 ieee80211_send_probereq(ni, /* node */ 1623 vap->iv_myaddr, /* SA */ 1624 ni->ni_macaddr, /* DA */ 1625 vap->iv_bss->ni_bssid, /* BSSID */ 1626 vap->iv_bss->ni_essid, 1627 vap->iv_bss->ni_esslen); /* SSID */ 1628 } 1629 1630 /* XXX not right for 802.1x/WPA */ 1631 ieee80211_node_authorize(ni); 1632 } 1633 return ni; 1634 } 1635 1636 void 1637 ieee80211_init_neighbor(struct ieee80211_node *ni, 1638 const struct ieee80211_frame *wh, 1639 const struct ieee80211_scanparams *sp) 1640 { 1641 int do_ht_setup = 0; 1642 1643 ni->ni_esslen = sp->ssid[1]; 1644 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1645 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1646 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1647 ni->ni_intval = sp->bintval; 1648 ni->ni_capinfo = sp->capinfo; 1649 ni->ni_chan = ni->ni_ic->ic_curchan; 1650 ni->ni_fhdwell = sp->fhdwell; 1651 ni->ni_fhindex = sp->fhindex; 1652 ni->ni_erp = sp->erp; 1653 ni->ni_timoff = sp->timoff; 1654 #ifdef IEEE80211_SUPPORT_MESH 1655 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1656 ieee80211_mesh_init_neighbor(ni, wh, sp); 1657 #endif 1658 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1659 ieee80211_ies_expand(&ni->ni_ies); 1660 if (ni->ni_ies.wme_ie != NULL) 1661 ni->ni_flags |= IEEE80211_NODE_QOS; 1662 else 1663 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1664 #ifdef IEEE80211_SUPPORT_SUPERG 1665 if (ni->ni_ies.ath_ie != NULL) 1666 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1667 #endif 1668 if (ni->ni_ies.htcap_ie != NULL) 1669 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1670 if (ni->ni_ies.htinfo_ie != NULL) 1671 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1672 1673 if ((ni->ni_ies.htcap_ie != NULL) && 1674 (ni->ni_ies.htinfo_ie != NULL) && 1675 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1676 do_ht_setup = 1; 1677 } 1678 } 1679 1680 /* NB: must be after ni_chan is setup */ 1681 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1682 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1683 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1684 1685 /* 1686 * If the neighbor is HT compatible, flip that on. 1687 */ 1688 if (do_ht_setup) { 1689 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1690 "%s: doing HT setup\n", __func__); 1691 ieee80211_ht_node_init(ni); 1692 ieee80211_ht_updateparams(ni, 1693 ni->ni_ies.htcap_ie, 1694 ni->ni_ies.htinfo_ie); 1695 ieee80211_setup_htrates(ni, 1696 ni->ni_ies.htcap_ie, 1697 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1698 ieee80211_setup_basic_htrates(ni, 1699 ni->ni_ies.htinfo_ie); 1700 ieee80211_node_setuptxparms(ni); 1701 ieee80211_ratectl_node_init(ni); 1702 1703 /* Reassociate; we're now 11n */ 1704 /* 1705 * XXX TODO: this is the wrong thing to do - 1706 * we're calling it with isnew=1 so the ath(4) 1707 * driver reinitialises the rate tables. 1708 * This "mostly" works for ath(4), but it won't 1709 * be right for firmware devices which allocate 1710 * node states. 1711 * 1712 * So, do we just create a new node and delete 1713 * the old one? Or? 1714 */ 1715 if (ni->ni_ic->ic_newassoc) 1716 ni->ni_ic->ic_newassoc(ni, 1); 1717 } 1718 } 1719 1720 /* 1721 * Do node discovery in adhoc mode on receipt of a beacon 1722 * or probe response frame. Note that for the driver's 1723 * benefit we we treat this like an association so the 1724 * driver has an opportunity to setup it's private state. 1725 */ 1726 struct ieee80211_node * 1727 ieee80211_add_neighbor(struct ieee80211vap *vap, 1728 const struct ieee80211_frame *wh, 1729 const struct ieee80211_scanparams *sp) 1730 { 1731 struct ieee80211_node *ni; 1732 1733 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1734 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1735 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1736 if (ni != NULL) { 1737 struct ieee80211com *ic = vap->iv_ic; 1738 1739 ieee80211_init_neighbor(ni, wh, sp); 1740 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1741 ni->ni_flags |= IEEE80211_NODE_ERP; 1742 ieee80211_node_setuptxparms(ni); 1743 ieee80211_ratectl_node_init(ni); 1744 if (ic->ic_newassoc != NULL) 1745 ic->ic_newassoc(ni, 1); 1746 /* XXX not right for 802.1x/WPA */ 1747 ieee80211_node_authorize(ni); 1748 } 1749 return ni; 1750 } 1751 1752 #define IS_PROBEREQ(wh) \ 1753 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1754 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1755 #define IS_BCAST_PROBEREQ(wh) \ 1756 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1757 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1758 1759 static __inline struct ieee80211_node * 1760 _find_rxnode(struct ieee80211_node_table *nt, 1761 const struct ieee80211_frame_min *wh) 1762 { 1763 if (IS_BCAST_PROBEREQ(wh)) 1764 return NULL; /* spam bcast probe req to all vap's */ 1765 return ieee80211_find_node_locked(nt, wh->i_addr2); 1766 } 1767 1768 /* 1769 * Locate the node for sender, track state, and then pass the 1770 * (referenced) node up to the 802.11 layer for its use. Note 1771 * we can return NULL if the sender is not in the table. 1772 */ 1773 struct ieee80211_node * 1774 #ifdef IEEE80211_DEBUG_REFCNT 1775 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1776 const struct ieee80211_frame_min *wh, const char *func, int line) 1777 #else 1778 ieee80211_find_rxnode(struct ieee80211com *ic, 1779 const struct ieee80211_frame_min *wh) 1780 #endif 1781 { 1782 struct ieee80211_node_table *nt; 1783 struct ieee80211_node *ni; 1784 1785 nt = &ic->ic_sta; 1786 IEEE80211_NODE_LOCK(nt); 1787 ni = _find_rxnode(nt, wh); 1788 IEEE80211_NODE_UNLOCK(nt); 1789 1790 return ni; 1791 } 1792 1793 /* 1794 * Like ieee80211_find_rxnode but use the supplied h/w 1795 * key index as a hint to locate the node in the key 1796 * mapping table. If an entry is present at the key 1797 * index we return it; otherwise do a normal lookup and 1798 * update the mapping table if the station has a unicast 1799 * key assigned to it. 1800 */ 1801 struct ieee80211_node * 1802 #ifdef IEEE80211_DEBUG_REFCNT 1803 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1804 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1805 const char *func, int line) 1806 #else 1807 ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1808 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1809 #endif 1810 { 1811 struct ieee80211_node_table *nt; 1812 struct ieee80211_node *ni; 1813 1814 nt = &ic->ic_sta; 1815 IEEE80211_NODE_LOCK(nt); 1816 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1817 ni = nt->nt_keyixmap[keyix]; 1818 else 1819 ni = NULL; 1820 if (ni == NULL) { 1821 ni = _find_rxnode(nt, wh); 1822 if (ni != NULL && nt->nt_keyixmap != NULL) { 1823 /* 1824 * If the station has a unicast key cache slot 1825 * assigned update the key->node mapping table. 1826 */ 1827 keyix = ni->ni_ucastkey.wk_rxkeyix; 1828 /* XXX can keyixmap[keyix] != NULL? */ 1829 if (keyix < nt->nt_keyixmax && 1830 nt->nt_keyixmap[keyix] == NULL) { 1831 IEEE80211_DPRINTF(ni->ni_vap, 1832 IEEE80211_MSG_NODE, 1833 "%s: add key map entry %p<%s> refcnt %d\n", 1834 __func__, ni, ether_sprintf(ni->ni_macaddr), 1835 ieee80211_node_refcnt(ni)+1); 1836 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1837 } 1838 } 1839 } else { 1840 if (IS_BCAST_PROBEREQ(wh)) 1841 ni = NULL; /* spam bcast probe req to all vap's */ 1842 else 1843 ieee80211_ref_node(ni); 1844 } 1845 IEEE80211_NODE_UNLOCK(nt); 1846 1847 return ni; 1848 } 1849 #undef IS_BCAST_PROBEREQ 1850 #undef IS_PROBEREQ 1851 1852 /* 1853 * Return a reference to the appropriate node for sending 1854 * a data frame. This handles node discovery in adhoc networks. 1855 */ 1856 struct ieee80211_node * 1857 #ifdef IEEE80211_DEBUG_REFCNT 1858 ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1859 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1860 const char *func, int line) 1861 #else 1862 ieee80211_find_txnode(struct ieee80211vap *vap, 1863 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1864 #endif 1865 { 1866 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1867 struct ieee80211_node *ni; 1868 1869 /* 1870 * The destination address should be in the node table 1871 * unless this is a multicast/broadcast frame. We can 1872 * also optimize station mode operation, all frames go 1873 * to the bss node. 1874 */ 1875 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1876 IEEE80211_NODE_LOCK(nt); 1877 if (vap->iv_opmode == IEEE80211_M_STA || 1878 vap->iv_opmode == IEEE80211_M_WDS || 1879 IEEE80211_IS_MULTICAST(macaddr)) 1880 ni = ieee80211_ref_node(vap->iv_bss); 1881 else 1882 ni = ieee80211_find_node_locked(nt, macaddr); 1883 IEEE80211_NODE_UNLOCK(nt); 1884 1885 if (ni == NULL) { 1886 if (vap->iv_opmode == IEEE80211_M_IBSS || 1887 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1888 /* 1889 * In adhoc mode cons up a node for the destination. 1890 * Note that we need an additional reference for the 1891 * caller to be consistent with 1892 * ieee80211_find_node_locked. 1893 */ 1894 /* 1895 * XXX TODO: this doesn't fake up 11n state; we need 1896 * to find another way to get it upgraded. 1897 */ 1898 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1899 if (ni != NULL) 1900 (void) ieee80211_ref_node(ni); 1901 } else { 1902 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1903 "no node, discard frame (%s)", __func__); 1904 vap->iv_stats.is_tx_nonode++; 1905 } 1906 } 1907 return ni; 1908 } 1909 1910 static void 1911 _ieee80211_free_node(struct ieee80211_node *ni) 1912 { 1913 struct ieee80211_node_table *nt = ni->ni_table; 1914 1915 /* 1916 * NB: careful about referencing the vap as it may be 1917 * gone if the last reference was held by a driver. 1918 * We know the com will always be present so it's safe 1919 * to use ni_ic below to reclaim resources. 1920 */ 1921 #if 0 1922 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1923 "%s %p<%s> in %s table\n", __func__, ni, 1924 ether_sprintf(ni->ni_macaddr), 1925 nt != NULL ? nt->nt_name : "<gone>"); 1926 #endif 1927 if (ni->ni_associd != 0) { 1928 struct ieee80211vap *vap = ni->ni_vap; 1929 if (vap->iv_aid_bitmap != NULL) 1930 IEEE80211_AID_CLR(vap, ni->ni_associd); 1931 } 1932 if (nt != NULL) 1933 ieee80211_del_node_nt(nt, ni); 1934 ni->ni_ic->ic_node_free(ni); 1935 } 1936 1937 /* 1938 * Clear any entry in the unicast key mapping table. 1939 */ 1940 static int 1941 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1942 { 1943 ieee80211_keyix keyix; 1944 1945 keyix = ni->ni_ucastkey.wk_rxkeyix; 1946 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1947 nt->nt_keyixmap[keyix] == ni) { 1948 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1949 "%s: %p<%s> clear key map entry %u\n", 1950 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 1951 nt->nt_keyixmap[keyix] = NULL; 1952 ieee80211_node_decref(ni); 1953 return 1; 1954 } 1955 1956 return 0; 1957 } 1958 1959 void 1960 #ifdef IEEE80211_DEBUG_REFCNT 1961 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1962 #else 1963 ieee80211_free_node(struct ieee80211_node *ni) 1964 #endif 1965 { 1966 struct ieee80211_node_table *nt = ni->ni_table; 1967 1968 #ifdef IEEE80211_DEBUG_REFCNT 1969 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1970 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1971 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1972 #endif 1973 if (nt != NULL) { 1974 IEEE80211_NODE_LOCK(nt); 1975 if (ieee80211_node_dectestref(ni)) { 1976 /* 1977 * Last reference, reclaim state. 1978 */ 1979 _ieee80211_free_node(ni); 1980 } else if (ieee80211_node_refcnt(ni) == 1) 1981 if (node_clear_keyixmap(nt, ni)) 1982 _ieee80211_free_node(ni); 1983 IEEE80211_NODE_UNLOCK(nt); 1984 } else { 1985 if (ieee80211_node_dectestref(ni)) 1986 _ieee80211_free_node(ni); 1987 } 1988 } 1989 1990 /* 1991 * Reclaim a unicast key and clear any key cache state. 1992 */ 1993 int 1994 ieee80211_node_delucastkey(struct ieee80211_node *ni) 1995 { 1996 struct ieee80211com *ic = ni->ni_ic; 1997 struct ieee80211_node_table *nt = &ic->ic_sta; 1998 struct ieee80211_node *nikey; 1999 ieee80211_keyix keyix; 2000 int isowned, status; 2001 2002 /* 2003 * NB: We must beware of LOR here; deleting the key 2004 * can cause the crypto layer to block traffic updates 2005 * which can generate a LOR against the node table lock; 2006 * grab it here and stash the key index for our use below. 2007 * 2008 * Must also beware of recursion on the node table lock. 2009 * When called from node_cleanup we may already have 2010 * the node table lock held. Unfortunately there's no 2011 * way to separate out this path so we must do this 2012 * conditionally. 2013 */ 2014 isowned = IEEE80211_NODE_IS_LOCKED(nt); 2015 if (!isowned) 2016 IEEE80211_NODE_LOCK(nt); 2017 nikey = NULL; 2018 status = 1; /* NB: success */ 2019 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 2020 keyix = ni->ni_ucastkey.wk_rxkeyix; 2021 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 2022 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 2023 nikey = nt->nt_keyixmap[keyix]; 2024 nt->nt_keyixmap[keyix] = NULL; 2025 } 2026 } 2027 if (!isowned) 2028 IEEE80211_NODE_UNLOCK(nt); 2029 2030 if (nikey != NULL) { 2031 KASSERT(nikey == ni, 2032 ("key map out of sync, ni %p nikey %p", ni, nikey)); 2033 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2034 "%s: delete key map entry %p<%s> refcnt %d\n", 2035 __func__, ni, ether_sprintf(ni->ni_macaddr), 2036 ieee80211_node_refcnt(ni)-1); 2037 ieee80211_free_node(ni); 2038 } 2039 return status; 2040 } 2041 2042 /* 2043 * Reclaim a node. If this is the last reference count then 2044 * do the normal free work. Otherwise remove it from the node 2045 * table and mark it gone by clearing the back-reference. 2046 */ 2047 static void 2048 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2049 { 2050 2051 IEEE80211_NODE_LOCK_ASSERT(nt); 2052 2053 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2054 "%s: remove %p<%s> from %s table, refcnt %d\n", 2055 __func__, ni, ether_sprintf(ni->ni_macaddr), 2056 nt->nt_name, ieee80211_node_refcnt(ni)-1); 2057 /* 2058 * Clear any entry in the unicast key mapping table. 2059 * We need to do it here so rx lookups don't find it 2060 * in the mapping table even if it's not in the hash 2061 * table. We cannot depend on the mapping table entry 2062 * being cleared because the node may not be free'd. 2063 */ 2064 (void)node_clear_keyixmap(nt, ni); 2065 if (!ieee80211_node_dectestref(ni)) { 2066 /* 2067 * Other references are present, just remove the 2068 * node from the table so it cannot be found. When 2069 * the references are dropped storage will be 2070 * reclaimed. 2071 */ 2072 ieee80211_del_node_nt(nt, ni); 2073 } else 2074 _ieee80211_free_node(ni); 2075 } 2076 2077 /* 2078 * Node table support. 2079 */ 2080 2081 static void 2082 ieee80211_node_table_init(struct ieee80211com *ic, 2083 struct ieee80211_node_table *nt, 2084 const char *name, int inact, int keyixmax) 2085 { 2086 2087 nt->nt_ic = ic; 2088 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 2089 TAILQ_INIT(&nt->nt_node); 2090 nt->nt_count = 0; 2091 nt->nt_name = name; 2092 nt->nt_inact_init = inact; 2093 nt->nt_keyixmax = keyixmax; 2094 if (nt->nt_keyixmax > 0) { 2095 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 2096 keyixmax * sizeof(struct ieee80211_node *), 2097 M_80211_NODE, 2098 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2099 if (nt->nt_keyixmap == NULL) 2100 ic_printf(ic, 2101 "Cannot allocate key index map with %u entries\n", 2102 keyixmax); 2103 } else 2104 nt->nt_keyixmap = NULL; 2105 } 2106 2107 static void 2108 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 2109 struct ieee80211vap *match) 2110 { 2111 struct ieee80211_node *ni, *next; 2112 2113 IEEE80211_NODE_LOCK(nt); 2114 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 2115 if (match != NULL && ni->ni_vap != match) 2116 continue; 2117 /* XXX can this happen? if so need's work */ 2118 if (ni->ni_associd != 0) { 2119 struct ieee80211vap *vap = ni->ni_vap; 2120 2121 if (vap->iv_auth->ia_node_leave != NULL) 2122 vap->iv_auth->ia_node_leave(ni); 2123 if (vap->iv_aid_bitmap != NULL) 2124 IEEE80211_AID_CLR(vap, ni->ni_associd); 2125 } 2126 ni->ni_wdsvap = NULL; /* clear reference */ 2127 node_reclaim(nt, ni); 2128 } 2129 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 2130 /* 2131 * Make a separate pass to clear references to this vap 2132 * held by DWDS entries. They will not be matched above 2133 * because ni_vap will point to the ap vap but we still 2134 * need to clear ni_wdsvap when the WDS vap is destroyed 2135 * and/or reset. 2136 */ 2137 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 2138 if (ni->ni_wdsvap == match) 2139 ni->ni_wdsvap = NULL; 2140 } 2141 IEEE80211_NODE_UNLOCK(nt); 2142 } 2143 2144 static void 2145 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2146 { 2147 ieee80211_node_table_reset(nt, NULL); 2148 if (nt->nt_keyixmap != NULL) { 2149 #ifdef DIAGNOSTIC 2150 /* XXX verify all entries are NULL */ 2151 int i; 2152 for (i = 0; i < nt->nt_keyixmax; i++) 2153 if (nt->nt_keyixmap[i] != NULL) 2154 printf("%s: %s[%u] still active\n", __func__, 2155 nt->nt_name, i); 2156 #endif 2157 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 2158 nt->nt_keyixmap = NULL; 2159 } 2160 IEEE80211_NODE_LOCK_DESTROY(nt); 2161 } 2162 2163 static void 2164 timeout_stations(void *arg __unused, struct ieee80211_node *ni) 2165 { 2166 struct ieee80211com *ic = ni->ni_ic; 2167 struct ieee80211vap *vap = ni->ni_vap; 2168 2169 /* 2170 * Only process stations when in RUN state. This 2171 * insures, for example, that we don't timeout an 2172 * inactive station during CAC. Note that CSA state 2173 * is actually handled in ieee80211_node_timeout as 2174 * it applies to more than timeout processing. 2175 */ 2176 if (vap->iv_state != IEEE80211_S_RUN) 2177 return; 2178 /* 2179 * Ignore entries for which have yet to receive an 2180 * authentication frame. These are transient and 2181 * will be reclaimed when the last reference to them 2182 * goes away (when frame xmits complete). 2183 */ 2184 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2185 vap->iv_opmode == IEEE80211_M_STA) && 2186 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2187 return; 2188 /* 2189 * Free fragment if not needed anymore 2190 * (last fragment older than 1s). 2191 * XXX doesn't belong here, move to node_age 2192 */ 2193 if (ni->ni_rxfrag[0] != NULL && 2194 ticks > ni->ni_rxfragstamp + hz) { 2195 m_freem(ni->ni_rxfrag[0]); 2196 ni->ni_rxfrag[0] = NULL; 2197 } 2198 if (ni->ni_inact > 0) { 2199 ni->ni_inact--; 2200 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2201 "%s: inact %u inact_reload %u nrates %u", 2202 __func__, ni->ni_inact, ni->ni_inact_reload, 2203 ni->ni_rates.rs_nrates); 2204 } 2205 /* 2206 * Special case ourself; we may be idle for extended periods 2207 * of time and regardless reclaiming our state is wrong. 2208 * XXX run ic_node_age 2209 */ 2210 /* XXX before inact decrement? */ 2211 if (ni == vap->iv_bss) 2212 return; 2213 if (ni->ni_associd != 0 || 2214 (vap->iv_opmode == IEEE80211_M_IBSS || 2215 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2216 /* 2217 * Age/drain resources held by the station. 2218 */ 2219 ic->ic_node_age(ni); 2220 /* 2221 * Probe the station before time it out. We 2222 * send a null data frame which may not be 2223 * universally supported by drivers (need it 2224 * for ps-poll support so it should be...). 2225 * 2226 * XXX don't probe the station unless we've 2227 * received a frame from them (and have 2228 * some idea of the rates they are capable 2229 * of); this will get fixed more properly 2230 * soon with better handling of the rate set. 2231 */ 2232 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2233 (0 < ni->ni_inact && 2234 ni->ni_inact <= vap->iv_inact_probe) && 2235 ni->ni_rates.rs_nrates != 0) { 2236 IEEE80211_NOTE(vap, 2237 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2238 ni, "%s", 2239 "probe station due to inactivity"); 2240 /* 2241 * Grab a reference so the node cannot 2242 * be reclaimed before we send the frame. 2243 * ieee80211_send_nulldata understands 2244 * we've done this and reclaims the 2245 * ref for us as needed. 2246 */ 2247 /* XXX fix this (not required anymore). */ 2248 ieee80211_ref_node(ni); 2249 /* XXX useless */ 2250 ieee80211_send_nulldata(ni); 2251 /* XXX stat? */ 2252 return; 2253 } 2254 } 2255 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2256 ni->ni_inact <= 0) { 2257 IEEE80211_NOTE(vap, 2258 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2259 "station timed out due to inactivity " 2260 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2261 /* 2262 * Send a deauthenticate frame and drop the station. 2263 * This is somewhat complicated due to reference counts 2264 * and locking. At this point a station will typically 2265 * have a reference count of 2. ieee80211_node_leave 2266 * will do a "free" of the node which will drop the 2267 * reference count. But in the meantime a reference 2268 * wil be held by the deauth frame. The actual reclaim 2269 * of the node will happen either after the tx is 2270 * completed or by ieee80211_node_leave. 2271 */ 2272 if (ni->ni_associd != 0) { 2273 IEEE80211_SEND_MGMT(ni, 2274 IEEE80211_FC0_SUBTYPE_DEAUTH, 2275 IEEE80211_REASON_AUTH_EXPIRE); 2276 } 2277 ieee80211_node_leave(ni); 2278 vap->iv_stats.is_node_timeout++; 2279 } 2280 } 2281 2282 /* 2283 * Timeout inactive stations and do related housekeeping. 2284 */ 2285 static void 2286 ieee80211_timeout_stations(struct ieee80211com *ic) 2287 { 2288 struct ieee80211_node_table *nt = &ic->ic_sta; 2289 2290 ieee80211_iterate_nodes(nt, timeout_stations, NULL); 2291 } 2292 2293 /* 2294 * Aggressively reclaim resources. This should be used 2295 * only in a critical situation to reclaim mbuf resources. 2296 */ 2297 void 2298 ieee80211_drain(struct ieee80211com *ic) 2299 { 2300 struct ieee80211_node_table *nt = &ic->ic_sta; 2301 struct ieee80211vap *vap; 2302 struct ieee80211_node *ni; 2303 2304 IEEE80211_NODE_LOCK(nt); 2305 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2306 /* 2307 * Ignore entries for which have yet to receive an 2308 * authentication frame. These are transient and 2309 * will be reclaimed when the last reference to them 2310 * goes away (when frame xmits complete). 2311 */ 2312 vap = ni->ni_vap; 2313 /* 2314 * Only process stations when in RUN state. This 2315 * insures, for example, that we don't timeout an 2316 * inactive station during CAC. Note that CSA state 2317 * is actually handled in ieee80211_node_timeout as 2318 * it applies to more than timeout processing. 2319 */ 2320 if (vap->iv_state != IEEE80211_S_RUN) 2321 continue; 2322 /* XXX can vap be NULL? */ 2323 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2324 vap->iv_opmode == IEEE80211_M_STA) && 2325 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2326 continue; 2327 /* 2328 * Free fragments. 2329 * XXX doesn't belong here, move to node_drain 2330 */ 2331 if (ni->ni_rxfrag[0] != NULL) { 2332 m_freem(ni->ni_rxfrag[0]); 2333 ni->ni_rxfrag[0] = NULL; 2334 } 2335 /* 2336 * Drain resources held by the station. 2337 */ 2338 ic->ic_node_drain(ni); 2339 } 2340 IEEE80211_NODE_UNLOCK(nt); 2341 } 2342 2343 /* 2344 * Per-ieee80211com inactivity timer callback. 2345 */ 2346 void 2347 ieee80211_node_timeout(void *arg) 2348 { 2349 struct ieee80211com *ic = arg; 2350 2351 /* 2352 * Defer timeout processing if a channel switch is pending. 2353 * We typically need to be mute so not doing things that 2354 * might generate frames is good to handle in one place. 2355 * Suppressing the station timeout processing may extend the 2356 * lifetime of inactive stations (by not decrementing their 2357 * idle counters) but this should be ok unless the CSA is 2358 * active for an unusually long time. 2359 */ 2360 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2361 ieee80211_scan_timeout(ic); 2362 ieee80211_timeout_stations(ic); 2363 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2364 2365 IEEE80211_LOCK(ic); 2366 ieee80211_erp_timeout(ic); 2367 ieee80211_ht_timeout(ic); 2368 IEEE80211_UNLOCK(ic); 2369 } 2370 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2371 ieee80211_node_timeout, ic); 2372 } 2373 2374 /* 2375 * The same as ieee80211_iterate_nodes(), but for one vap only. 2376 */ 2377 int 2378 ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt, 2379 struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg) 2380 { 2381 struct ieee80211_node **ni_arr; 2382 struct ieee80211_node *ni; 2383 size_t size; 2384 int count, i; 2385 2386 /* 2387 * Iterate over the node table and save an array of ref'ed nodes. 2388 * 2389 * This is separated out from calling the actual node function so that 2390 * no LORs will occur. 2391 */ 2392 IEEE80211_NODE_LOCK(nt); 2393 count = nt->nt_count; 2394 size = count * sizeof(struct ieee80211_node *); 2395 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2396 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2397 if (ni_arr == NULL) { 2398 IEEE80211_NODE_UNLOCK(nt); 2399 return (ENOMEM); 2400 } 2401 2402 i = 0; 2403 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2404 if (vap != NULL && ni->ni_vap != vap) 2405 continue; 2406 KASSERT(i < count, 2407 ("node array overflow (vap %p, i %d, count %d)\n", 2408 vap, i, count)); 2409 ni_arr[i] = ieee80211_ref_node(ni); 2410 i++; 2411 } 2412 IEEE80211_NODE_UNLOCK(nt); 2413 2414 for (i = 0; i < count; i++) { 2415 if (ni_arr[i] == NULL) /* end of the list */ 2416 break; 2417 (*f)(arg, ni_arr[i]); 2418 /* ieee80211_free_node() locks by itself */ 2419 ieee80211_free_node(ni_arr[i]); 2420 } 2421 2422 IEEE80211_FREE(ni_arr, M_80211_NODE); 2423 2424 return (0); 2425 } 2426 2427 /* 2428 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2429 * reference in the source. 2430 */ 2431 void 2432 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2433 ieee80211_iter_func *f, void *arg) 2434 { 2435 /* XXX no way to pass error to the caller. */ 2436 (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg); 2437 } 2438 2439 void 2440 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2441 { 2442 printf("0x%p: mac %s refcnt %d\n", ni, 2443 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2444 printf("\tauthmode %u flags 0x%x\n", 2445 ni->ni_authmode, ni->ni_flags); 2446 printf("\tassocid 0x%x txpower %u vlan %u\n", 2447 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2448 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2449 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2450 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2451 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2452 ni->ni_rxfragstamp); 2453 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2454 node_getrssi(ni), ni->ni_noise, 2455 ni->ni_intval, ni->ni_capinfo); 2456 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2457 ether_sprintf(ni->ni_bssid), 2458 ni->ni_esslen, ni->ni_essid, 2459 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2460 printf("\tinact %u inact_reload %u txrate %u\n", 2461 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2462 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2463 ni->ni_htcap, ni->ni_htparam, 2464 ni->ni_htctlchan, ni->ni_ht2ndchan); 2465 printf("\thtopmode %x htstbc %x chw %u\n", 2466 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2467 } 2468 2469 void 2470 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2471 { 2472 ieee80211_iterate_nodes(nt, 2473 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2474 } 2475 2476 static void 2477 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2478 { 2479 struct ieee80211vap *vap; 2480 2481 IEEE80211_LOCK_ASSERT(ic); 2482 2483 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2484 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2485 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2486 } 2487 2488 void 2489 ieee80211_notify_erp(struct ieee80211com *ic) 2490 { 2491 IEEE80211_LOCK(ic); 2492 ieee80211_notify_erp_locked(ic); 2493 IEEE80211_UNLOCK(ic); 2494 } 2495 2496 /* 2497 * Handle a station joining an 11g network. 2498 */ 2499 static void 2500 ieee80211_node_join_11g(struct ieee80211_node *ni) 2501 { 2502 struct ieee80211com *ic = ni->ni_ic; 2503 2504 IEEE80211_LOCK_ASSERT(ic); 2505 2506 /* 2507 * Station isn't capable of short slot time. Bump 2508 * the count of long slot time stations and disable 2509 * use of short slot time. Note that the actual switch 2510 * over to long slot time use may not occur until the 2511 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2512 */ 2513 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2514 ic->ic_longslotsta++; 2515 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2516 "station needs long slot time, count %d", 2517 ic->ic_longslotsta); 2518 /* XXX vap's w/ conflicting needs won't work */ 2519 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2520 /* 2521 * Don't force slot time when switched to turbo 2522 * mode as non-ERP stations won't be present; this 2523 * need only be done when on the normal G channel. 2524 */ 2525 ieee80211_set_shortslottime(ic, 0); 2526 } 2527 } 2528 /* 2529 * If the new station is not an ERP station 2530 * then bump the counter and enable protection 2531 * if configured. 2532 */ 2533 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2534 ic->ic_nonerpsta++; 2535 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2536 "station is !ERP, %d non-ERP stations associated", 2537 ic->ic_nonerpsta); 2538 /* 2539 * If station does not support short preamble 2540 * then we must enable use of Barker preamble. 2541 */ 2542 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2543 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2544 "%s", "station needs long preamble"); 2545 ic->ic_flags |= IEEE80211_F_USEBARKER; 2546 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2547 } 2548 /* 2549 * If protection is configured and this is the first 2550 * indication we should use protection, enable it. 2551 */ 2552 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2553 ic->ic_nonerpsta == 1 && 2554 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2555 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2556 "%s: enable use of protection\n", __func__); 2557 ic->ic_flags |= IEEE80211_F_USEPROT; 2558 ieee80211_notify_erp_locked(ic); 2559 } 2560 } else 2561 ni->ni_flags |= IEEE80211_NODE_ERP; 2562 } 2563 2564 void 2565 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2566 { 2567 struct ieee80211com *ic = ni->ni_ic; 2568 struct ieee80211vap *vap = ni->ni_vap; 2569 int newassoc; 2570 2571 if (ni->ni_associd == 0) { 2572 uint16_t aid; 2573 2574 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2575 /* 2576 * It would be good to search the bitmap 2577 * more efficiently, but this will do for now. 2578 */ 2579 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2580 if (!IEEE80211_AID_ISSET(vap, aid)) 2581 break; 2582 } 2583 if (aid >= vap->iv_max_aid) { 2584 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2585 ieee80211_node_leave(ni); 2586 return; 2587 } 2588 ni->ni_associd = aid | 0xc000; 2589 ni->ni_jointime = time_uptime; 2590 IEEE80211_LOCK(ic); 2591 IEEE80211_AID_SET(vap, ni->ni_associd); 2592 vap->iv_sta_assoc++; 2593 ic->ic_sta_assoc++; 2594 2595 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2596 ieee80211_ht_node_join(ni); 2597 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2598 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2599 ieee80211_node_join_11g(ni); 2600 IEEE80211_UNLOCK(ic); 2601 2602 newassoc = 1; 2603 } else 2604 newassoc = 0; 2605 2606 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2607 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2608 IEEE80211_NODE_AID(ni), 2609 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2610 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2611 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2612 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2613 ni->ni_flags & IEEE80211_NODE_HT ? 2614 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2615 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2616 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2617 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2618 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2619 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2620 ", fast-frames" : "", 2621 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2622 ", turbo" : "" 2623 ); 2624 2625 ieee80211_node_setuptxparms(ni); 2626 ieee80211_ratectl_node_init(ni); 2627 /* give driver a chance to setup state like ni_txrate */ 2628 if (ic->ic_newassoc != NULL) 2629 ic->ic_newassoc(ni, newassoc); 2630 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2631 /* tell the authenticator about new station */ 2632 if (vap->iv_auth->ia_node_join != NULL) 2633 vap->iv_auth->ia_node_join(ni); 2634 ieee80211_notify_node_join(ni, 2635 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2636 } 2637 2638 static void 2639 disable_protection(struct ieee80211com *ic) 2640 { 2641 KASSERT(ic->ic_nonerpsta == 0 && 2642 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2643 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2644 ic->ic_flags_ext)); 2645 2646 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2647 /* XXX verify mode? */ 2648 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2649 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2650 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2651 } 2652 ieee80211_notify_erp_locked(ic); 2653 } 2654 2655 /* 2656 * Handle a station leaving an 11g network. 2657 */ 2658 static void 2659 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2660 { 2661 struct ieee80211com *ic = ni->ni_ic; 2662 2663 IEEE80211_LOCK_ASSERT(ic); 2664 2665 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2666 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2667 ic->ic_bsschan->ic_flags)); 2668 2669 /* 2670 * If a long slot station do the slot time bookkeeping. 2671 */ 2672 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2673 KASSERT(ic->ic_longslotsta > 0, 2674 ("bogus long slot station count %d", ic->ic_longslotsta)); 2675 ic->ic_longslotsta--; 2676 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2677 "long slot time station leaves, count now %d", 2678 ic->ic_longslotsta); 2679 if (ic->ic_longslotsta == 0) { 2680 /* 2681 * Re-enable use of short slot time if supported 2682 * and not operating in IBSS mode (per spec). 2683 */ 2684 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2685 ic->ic_opmode != IEEE80211_M_IBSS) { 2686 IEEE80211_DPRINTF(ni->ni_vap, 2687 IEEE80211_MSG_ASSOC, 2688 "%s: re-enable use of short slot time\n", 2689 __func__); 2690 ieee80211_set_shortslottime(ic, 1); 2691 } 2692 } 2693 } 2694 /* 2695 * If a non-ERP station do the protection-related bookkeeping. 2696 */ 2697 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2698 KASSERT(ic->ic_nonerpsta > 0, 2699 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2700 ic->ic_nonerpsta--; 2701 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2702 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2703 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2704 " (non-ERP sta present)" : ""); 2705 if (ic->ic_nonerpsta == 0 && 2706 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2707 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2708 "%s: disable use of protection\n", __func__); 2709 disable_protection(ic); 2710 } 2711 } 2712 } 2713 2714 /* 2715 * Time out presence of an overlapping bss with non-ERP 2716 * stations. When operating in hostap mode we listen for 2717 * beacons from other stations and if we identify a non-ERP 2718 * station is present we enable protection. To identify 2719 * when all non-ERP stations are gone we time out this 2720 * condition. 2721 */ 2722 static void 2723 ieee80211_erp_timeout(struct ieee80211com *ic) 2724 { 2725 2726 IEEE80211_LOCK_ASSERT(ic); 2727 2728 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2729 ieee80211_time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2730 #if 0 2731 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2732 "%s", "age out non-ERP sta present on channel"); 2733 #endif 2734 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2735 if (ic->ic_nonerpsta == 0) 2736 disable_protection(ic); 2737 } 2738 } 2739 2740 /* 2741 * Handle bookkeeping for station deauthentication/disassociation 2742 * when operating as an ap. 2743 */ 2744 void 2745 ieee80211_node_leave(struct ieee80211_node *ni) 2746 { 2747 struct ieee80211com *ic = ni->ni_ic; 2748 struct ieee80211vap *vap = ni->ni_vap; 2749 struct ieee80211_node_table *nt = ni->ni_table; 2750 2751 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2752 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2753 2754 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2755 ("unexpected operating mode %u", vap->iv_opmode)); 2756 /* 2757 * If node wasn't previously associated all 2758 * we need to do is reclaim the reference. 2759 */ 2760 /* XXX ibss mode bypasses 11g and notification */ 2761 if (ni->ni_associd == 0) 2762 goto done; 2763 /* 2764 * Tell the authenticator the station is leaving. 2765 * Note that we must do this before yanking the 2766 * association id as the authenticator uses the 2767 * associd to locate it's state block. 2768 */ 2769 if (vap->iv_auth->ia_node_leave != NULL) 2770 vap->iv_auth->ia_node_leave(ni); 2771 2772 IEEE80211_LOCK(ic); 2773 IEEE80211_AID_CLR(vap, ni->ni_associd); 2774 vap->iv_sta_assoc--; 2775 ic->ic_sta_assoc--; 2776 2777 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2778 ieee80211_ht_node_leave(ni); 2779 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2780 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2781 ieee80211_node_leave_11g(ni); 2782 IEEE80211_UNLOCK(ic); 2783 /* 2784 * Cleanup station state. In particular clear various 2785 * state that might otherwise be reused if the node 2786 * is reused before the reference count goes to zero 2787 * (and memory is reclaimed). 2788 */ 2789 ieee80211_sta_leave(ni); 2790 done: 2791 /* 2792 * Remove the node from any table it's recorded in and 2793 * drop the caller's reference. Removal from the table 2794 * is important to insure the node is not reprocessed 2795 * for inactivity. 2796 */ 2797 if (nt != NULL) { 2798 IEEE80211_NODE_LOCK(nt); 2799 node_reclaim(nt, ni); 2800 IEEE80211_NODE_UNLOCK(nt); 2801 } else 2802 ieee80211_free_node(ni); 2803 } 2804 2805 struct rssiinfo { 2806 int rssi_samples; 2807 uint32_t rssi_total; 2808 }; 2809 2810 static void 2811 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2812 { 2813 struct rssiinfo *info = arg; 2814 struct ieee80211vap *vap = ni->ni_vap; 2815 int8_t rssi; 2816 2817 /* only associated stations */ 2818 if (ni->ni_associd == 0) 2819 return; 2820 rssi = vap->iv_ic->ic_node_getrssi(ni); 2821 if (rssi != 0) { 2822 info->rssi_samples++; 2823 info->rssi_total += rssi; 2824 } 2825 } 2826 2827 static void 2828 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2829 { 2830 struct rssiinfo *info = arg; 2831 struct ieee80211vap *vap = ni->ni_vap; 2832 int8_t rssi; 2833 2834 /* only neighbors */ 2835 /* XXX check bssid */ 2836 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2837 return; 2838 rssi = vap->iv_ic->ic_node_getrssi(ni); 2839 if (rssi != 0) { 2840 info->rssi_samples++; 2841 info->rssi_total += rssi; 2842 } 2843 } 2844 2845 #ifdef IEEE80211_SUPPORT_MESH 2846 static void 2847 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2848 { 2849 struct rssiinfo *info = arg; 2850 struct ieee80211vap *vap = ni->ni_vap; 2851 int8_t rssi; 2852 2853 /* only neighbors that peered successfully */ 2854 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 2855 return; 2856 rssi = vap->iv_ic->ic_node_getrssi(ni); 2857 if (rssi != 0) { 2858 info->rssi_samples++; 2859 info->rssi_total += rssi; 2860 } 2861 } 2862 #endif /* IEEE80211_SUPPORT_MESH */ 2863 2864 int8_t 2865 ieee80211_getrssi(struct ieee80211vap *vap) 2866 { 2867 #define NZ(x) ((x) == 0 ? 1 : (x)) 2868 struct ieee80211com *ic = vap->iv_ic; 2869 struct rssiinfo info; 2870 2871 info.rssi_total = 0; 2872 info.rssi_samples = 0; 2873 switch (vap->iv_opmode) { 2874 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2875 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2876 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi, 2877 &info); 2878 break; 2879 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2880 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi, 2881 &info); 2882 break; 2883 #ifdef IEEE80211_SUPPORT_MESH 2884 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 2885 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi, 2886 &info); 2887 break; 2888 #endif 2889 case IEEE80211_M_MONITOR: /* XXX */ 2890 case IEEE80211_M_STA: /* use stats from associated ap */ 2891 default: 2892 if (vap->iv_bss != NULL) 2893 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2894 info.rssi_samples = 1; 2895 break; 2896 } 2897 return info.rssi_total / NZ(info.rssi_samples); 2898 #undef NZ 2899 } 2900 2901 void 2902 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2903 { 2904 2905 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2906 return; 2907 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2908 /* for non-station mode return avg'd rssi accounting */ 2909 if (vap->iv_opmode != IEEE80211_M_STA) 2910 *rssi = ieee80211_getrssi(vap); 2911 } 2912