ieee80211_node.c revision 1.2
1 /*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002, 2003 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 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * Alternatively, this software may be distributed under the terms of the 18 * GNU General Public License ("GPL") version 2 as published by the Free 19 * Software Foundation. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD: src/sys/net80211/ieee80211_node.c,v 1.6 2003/08/19 22:17:03 sam Exp $"); 35 36 #include "opt_inet.h" 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/mbuf.h> 41 #include <sys/malloc.h> 42 #include <sys/kernel.h> 43 #include <sys/socket.h> 44 #include <sys/sockio.h> 45 #include <sys/endian.h> 46 #include <sys/errno.h> 47 #include <sys/bus.h> 48 #include <sys/proc.h> 49 #include <sys/sysctl.h> 50 51 #ifdef __FreeBSD__ 52 #include <machine/atomic.h> 53 #endif 54 55 #include <net/if.h> 56 #include <net/if_dl.h> 57 #include <net/if_media.h> 58 #include <net/if_arp.h> 59 #ifdef __FreeBSD__ 60 #include <net/ethernet.h> 61 #endif 62 #include <net/if_llc.h> 63 64 #include <net80211/ieee80211_var.h> 65 66 #include <net/bpf.h> 67 68 #ifdef INET 69 #include <netinet/in.h> 70 #include <netinet/if_ether.h> 71 #endif 72 73 static struct ieee80211_node *ieee80211_node_alloc(struct ieee80211com *); 74 static void ieee80211_node_free(struct ieee80211com *, struct ieee80211_node *); 75 static void ieee80211_node_copy(struct ieee80211com *, 76 struct ieee80211_node *, const struct ieee80211_node *); 77 static void ieee80211_setup_node(struct ieee80211com *ic, 78 struct ieee80211_node *ni, u_int8_t *macaddr); 79 static void _ieee80211_free_node(struct ieee80211com *, 80 struct ieee80211_node *); 81 82 void 83 ieee80211_node_attach(struct ifnet *ifp) 84 { 85 struct ieee80211com *ic = (void *)ifp; 86 87 #ifdef __FreeBSD__ 88 /* XXX need unit */ 89 mtx_init(&ic->ic_nodelock, ifp->if_name, "802.11 node table", MTX_DEF); 90 #endif 91 TAILQ_INIT(&ic->ic_node); 92 ic->ic_node_alloc = ieee80211_node_alloc; 93 ic->ic_node_free = ieee80211_node_free; 94 ic->ic_node_copy = ieee80211_node_copy; 95 } 96 97 void 98 ieee80211_node_lateattach(struct ifnet *ifp) 99 { 100 struct ieee80211com *ic = (void *)ifp; 101 102 ic->ic_bss = (*ic->ic_node_alloc)(ic); 103 KASSERT(ic->ic_bss != NULL, ("unable to setup inital BSS node")); 104 ic->ic_bss->ni_chan = IEEE80211_CHAN_ANYC; 105 } 106 107 void 108 ieee80211_node_detach(struct ifnet *ifp) 109 { 110 struct ieee80211com *ic = (void *)ifp; 111 112 if (ic->ic_bss != NULL) 113 (*ic->ic_node_free)(ic, ic->ic_bss); 114 ieee80211_free_allnodes(ic); 115 #ifdef __FreeBSD__ 116 mtx_destroy(&ic->ic_nodelock); 117 #endif 118 } 119 120 /* 121 * AP scanning support. 122 */ 123 124 /* 125 * Initialize the active channel set based on the set 126 * of available channels and the current PHY mode. 127 */ 128 static void 129 ieee80211_reset_scan(struct ifnet *ifp) 130 { 131 struct ieee80211com *ic = (void *)ifp; 132 133 memcpy(ic->ic_chan_scan, ic->ic_chan_active, 134 sizeof(ic->ic_chan_active)); 135 /* NB: hack, setup so next_scan starts with the first channel */ 136 if (ic->ic_bss->ni_chan == IEEE80211_CHAN_ANYC) 137 ic->ic_bss->ni_chan = &ic->ic_channels[IEEE80211_CHAN_MAX]; 138 } 139 140 /* 141 * Begin an active scan. 142 */ 143 void 144 ieee80211_begin_scan(struct ifnet *ifp) 145 { 146 struct ieee80211com *ic = (void *)ifp; 147 148 /* 149 * In all but hostap mode scanning starts off in 150 * an active mode before switching to passive. 151 */ 152 if (ic->ic_opmode != IEEE80211_M_HOSTAP) 153 ic->ic_flags |= IEEE80211_F_ASCAN; 154 if (ifp->if_flags & IFF_DEBUG) 155 if_printf(ifp, "begin %s scan\n", 156 (ic->ic_flags & IEEE80211_F_ASCAN) ? 157 "active" : "passive"); 158 /* 159 * Clear scan state and flush any previously seen 160 * AP's. Note that the latter assumes we don't act 161 * as both an AP and a station, otherwise we'll 162 * potentially flush state of stations associated 163 * with us. 164 */ 165 ieee80211_reset_scan(ifp); 166 ieee80211_free_allnodes(ic); 167 168 /* Scan the next channel. */ 169 ieee80211_next_scan(ifp); 170 } 171 172 /* 173 * Switch to the next channel marked for scanning. 174 */ 175 void 176 ieee80211_next_scan(struct ifnet *ifp) 177 { 178 struct ieee80211com *ic = (void *)ifp; 179 struct ieee80211_channel *chan; 180 181 chan = ic->ic_bss->ni_chan; 182 for (;;) { 183 if (++chan > &ic->ic_channels[IEEE80211_CHAN_MAX]) 184 chan = &ic->ic_channels[0]; 185 if (isset(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan))) { 186 /* 187 * Honor channels marked passive-only 188 * during an active scan. 189 */ 190 if ((ic->ic_flags & IEEE80211_F_ASCAN) == 0 || 191 (chan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0) 192 break; 193 } 194 if (chan == ic->ic_bss->ni_chan) { 195 ieee80211_end_scan(ifp); 196 return; 197 } 198 } 199 clrbit(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan)); 200 IEEE80211_DPRINTF(("ieee80211_next_scan: chan %d->%d\n", 201 ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan), 202 ieee80211_chan2ieee(ic, chan))); 203 ic->ic_bss->ni_chan = chan; 204 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 205 } 206 207 void 208 ieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan) 209 { 210 struct ieee80211_node *ni; 211 struct ifnet *ifp = &ic->ic_if; 212 213 ni = ic->ic_bss; 214 if (ifp->if_flags & IFF_DEBUG) 215 if_printf(ifp, "creating ibss\n"); 216 ic->ic_flags |= IEEE80211_F_SIBSS; 217 ni->ni_chan = chan; 218 ni->ni_rates = ic->ic_sup_rates[ieee80211_chan2mode(ic, ni->ni_chan)]; 219 IEEE80211_ADDR_COPY(ni->ni_macaddr, ic->ic_myaddr); 220 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr); 221 if (ic->ic_opmode == IEEE80211_M_IBSS) 222 ni->ni_bssid[0] |= 0x02; /* local bit for IBSS */ 223 ni->ni_esslen = ic->ic_des_esslen; 224 memcpy(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen); 225 ni->ni_rssi = 0; 226 ni->ni_rstamp = 0; 227 memset(ni->ni_tstamp, 0, sizeof(ni->ni_tstamp)); 228 ni->ni_intval = ic->ic_lintval; 229 ni->ni_capinfo = IEEE80211_CAPINFO_IBSS; 230 if (ic->ic_flags & IEEE80211_F_WEPON) 231 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 232 if (ic->ic_phytype == IEEE80211_T_FH) { 233 ni->ni_fhdwell = 200; /* XXX */ 234 ni->ni_fhindex = 1; 235 } 236 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 237 } 238 239 /* 240 * Complete a scan of potential channels. 241 */ 242 void 243 ieee80211_end_scan(struct ifnet *ifp) 244 { 245 struct ieee80211com *ic = (void *)ifp; 246 struct ieee80211_node *ni, *nextbs, *selbs; 247 u_int8_t rate; 248 int i, fail; 249 250 ic->ic_flags &= ~IEEE80211_F_ASCAN; 251 ni = TAILQ_FIRST(&ic->ic_node); 252 253 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 254 /* XXX off stack? */ 255 u_char occupied[roundup(IEEE80211_CHAN_MAX, NBBY)]; 256 /* 257 * The passive scan to look for existing AP's completed, 258 * select a channel to camp on. Identify the channels 259 * that already have one or more AP's and try to locate 260 * an unnoccupied one. If that fails, pick a random 261 * channel from the active set. 262 */ 263 for (; ni != NULL; ni = nextbs) { 264 ieee80211_ref_node(ni); 265 nextbs = TAILQ_NEXT(ni, ni_list); 266 setbit(occupied, ieee80211_chan2ieee(ic, ni->ni_chan)); 267 ieee80211_free_node(ic, ni); 268 } 269 for (i = 0; i < IEEE80211_CHAN_MAX; i++) 270 if (isset(ic->ic_chan_active, i) && isclr(occupied, i)) 271 break; 272 if (i == IEEE80211_CHAN_MAX) { 273 fail = arc4random() & 3; /* random 0-3 */ 274 for (i = 0; i < IEEE80211_CHAN_MAX; i++) 275 if (isset(ic->ic_chan_active, i) && fail-- == 0) 276 break; 277 } 278 ieee80211_create_ibss(ic, &ic->ic_channels[i]); 279 return; 280 } 281 if (ni == NULL) { 282 IEEE80211_DPRINTF(("%s: no scan candidate\n", __func__)); 283 notfound: 284 if (ic->ic_opmode == IEEE80211_M_IBSS && 285 (ic->ic_flags & IEEE80211_F_IBSSON) && 286 ic->ic_des_esslen != 0) { 287 ieee80211_create_ibss(ic, ic->ic_ibss_chan); 288 return; 289 } 290 /* 291 * Reset the list of channels to scan and start again. 292 */ 293 ieee80211_reset_scan(ifp); 294 ieee80211_next_scan(ifp); 295 return; 296 } 297 selbs = NULL; 298 if (ifp->if_flags & IFF_DEBUG) 299 if_printf(ifp, "\tmacaddr bssid chan rssi rate flag wep essid\n"); 300 for (; ni != NULL; ni = nextbs) { 301 ieee80211_ref_node(ni); 302 nextbs = TAILQ_NEXT(ni, ni_list); 303 if (ni->ni_fails) { 304 /* 305 * The configuration of the access points may change 306 * during my scan. So delete the entry for the AP 307 * and retry to associate if there is another beacon. 308 */ 309 if (ni->ni_fails++ > 2) 310 ieee80211_free_node(ic, ni); 311 continue; 312 } 313 fail = 0; 314 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 315 fail |= 0x01; 316 if (ic->ic_des_chan != IEEE80211_CHAN_ANYC && 317 ni->ni_chan != ic->ic_des_chan) 318 fail |= 0x01; 319 if (ic->ic_opmode == IEEE80211_M_IBSS) { 320 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 321 fail |= 0x02; 322 } else { 323 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 324 fail |= 0x02; 325 } 326 if (ic->ic_flags & IEEE80211_F_WEPON) { 327 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 328 fail |= 0x04; 329 } else { 330 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 331 fail |= 0x04; 332 } 333 rate = ieee80211_fix_rate(ic, ni, IEEE80211_F_DONEGO); 334 if (rate & IEEE80211_RATE_BASIC) 335 fail |= 0x08; 336 if (ic->ic_des_esslen != 0 && 337 (ni->ni_esslen != ic->ic_des_esslen || 338 memcmp(ni->ni_essid, ic->ic_des_essid, 339 ic->ic_des_esslen != 0))) 340 fail |= 0x10; 341 if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 342 !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 343 fail |= 0x20; 344 if (ifp->if_flags & IFF_DEBUG) { 345 printf(" %c %s", fail ? '-' : '+', 346 ether_sprintf(ni->ni_macaddr)); 347 printf(" %s%c", ether_sprintf(ni->ni_bssid), 348 fail & 0x20 ? '!' : ' '); 349 printf(" %3d%c", ieee80211_chan2ieee(ic, ni->ni_chan), 350 fail & 0x01 ? '!' : ' '); 351 printf(" %+4d", ni->ni_rssi); 352 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 353 fail & 0x08 ? '!' : ' '); 354 printf(" %4s%c", 355 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 356 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 357 "????", 358 fail & 0x02 ? '!' : ' '); 359 printf(" %3s%c ", 360 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? 361 "wep" : "no", 362 fail & 0x04 ? '!' : ' '); 363 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 364 printf("%s\n", fail & 0x10 ? "!" : ""); 365 } 366 if (!fail) { 367 if (selbs == NULL) 368 selbs = ni; 369 else if (ni->ni_rssi > selbs->ni_rssi) { 370 ieee80211_unref_node(&selbs); 371 selbs = ni; 372 } else 373 ieee80211_unref_node(&ni); 374 } else { 375 ieee80211_unref_node(&ni); 376 } 377 } 378 if (selbs == NULL) 379 goto notfound; 380 (*ic->ic_node_copy)(ic, ic->ic_bss, selbs); 381 if (ic->ic_opmode == IEEE80211_M_IBSS) { 382 ieee80211_fix_rate(ic, ic->ic_bss, IEEE80211_F_DOFRATE | 383 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 384 if (ic->ic_bss->ni_rates.rs_nrates == 0) { 385 selbs->ni_fails++; 386 ieee80211_unref_node(&selbs); 387 goto notfound; 388 } 389 ieee80211_unref_node(&selbs); 390 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 391 } else { 392 ieee80211_unref_node(&selbs); 393 ieee80211_new_state(ic, IEEE80211_S_AUTH, -1); 394 } 395 } 396 397 static struct ieee80211_node * 398 ieee80211_node_alloc(struct ieee80211com *ic) 399 { 400 return malloc(sizeof(struct ieee80211_node), M_DEVBUF, 401 M_NOWAIT | M_ZERO); 402 } 403 404 static void 405 ieee80211_node_free(struct ieee80211com *ic, struct ieee80211_node *ni) 406 { 407 free(ni, M_DEVBUF); 408 } 409 410 static void 411 ieee80211_node_copy(struct ieee80211com *ic, 412 struct ieee80211_node *dst, const struct ieee80211_node *src) 413 { 414 *dst = *src; 415 } 416 417 static void 418 ieee80211_setup_node(struct ieee80211com *ic, 419 struct ieee80211_node *ni, u_int8_t *macaddr) 420 { 421 int hash; 422 ieee80211_node_critsec_decl(s); 423 424 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 425 hash = IEEE80211_NODE_HASH(macaddr); 426 ni->ni_refcnt = 1; /* mark referenced */ 427 ieee80211_node_critsec_begin(ic, s); 428 TAILQ_INSERT_TAIL(&ic->ic_node, ni, ni_list); 429 LIST_INSERT_HEAD(&ic->ic_hash[hash], ni, ni_hash); 430 /* 431 * Note we don't enable the inactive timer when acting 432 * as a station. Nodes created in this mode represent 433 * AP's identified while scanning. If we time them out 434 * then several things happen: we can't return the data 435 * to users to show the list of AP's we encountered, and 436 * more importantly, we'll incorrectly deauthenticate 437 * ourself because the inactivity timer will kick us off. 438 */ 439 if (ic->ic_opmode != IEEE80211_M_STA) 440 ic->ic_inact_timer = IEEE80211_INACT_WAIT; 441 ieee80211_node_critsec_end(ic, s); 442 } 443 444 struct ieee80211_node * 445 ieee80211_alloc_node(struct ieee80211com *ic, u_int8_t *macaddr) 446 { 447 struct ieee80211_node *ni = (*ic->ic_node_alloc)(ic); 448 if (ni != NULL) 449 ieee80211_setup_node(ic, ni, macaddr); 450 return ni; 451 } 452 453 struct ieee80211_node * 454 ieee80211_dup_bss(struct ieee80211com *ic, u_int8_t *macaddr) 455 { 456 struct ieee80211_node *ni = (*ic->ic_node_alloc)(ic); 457 if (ni != NULL) { 458 memcpy(ni, ic->ic_bss, sizeof(struct ieee80211_node)); 459 ieee80211_setup_node(ic, ni, macaddr); 460 } 461 return ni; 462 } 463 464 struct ieee80211_node * 465 ieee80211_find_node(struct ieee80211com *ic, u_int8_t *macaddr) 466 { 467 struct ieee80211_node *ni; 468 int hash; 469 ieee80211_node_critsec_decl(s); 470 471 hash = IEEE80211_NODE_HASH(macaddr); 472 ieee80211_node_critsec_begin(ic, s); 473 LIST_FOREACH(ni, &ic->ic_hash[hash], ni_hash) { 474 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 475 ieee80211_node_incref(ni); /* mark referenced */ 476 break; 477 } 478 } 479 ieee80211_node_critsec_end(ic, s); 480 return ni; 481 } 482 483 /* 484 * Like find but search based on the channel too. 485 */ 486 struct ieee80211_node * 487 ieee80211_lookup_node(struct ieee80211com *ic, 488 u_int8_t *macaddr, struct ieee80211_channel *chan) 489 { 490 struct ieee80211_node *ni; 491 int hash; 492 ieee80211_node_critsec_decl(s); 493 494 hash = IEEE80211_NODE_HASH(macaddr); 495 ieee80211_node_critsec_begin(ic, s); 496 LIST_FOREACH(ni, &ic->ic_hash[hash], ni_hash) { 497 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && ni->ni_chan == chan) { 498 ieee80211_node_incref(ni);/* mark referenced */ 499 break; 500 } 501 } 502 ieee80211_node_critsec_end(ic, s); 503 return ni; 504 } 505 506 static void 507 _ieee80211_free_node(struct ieee80211com *ic, struct ieee80211_node *ni) 508 { 509 KASSERT(ni != ic->ic_bss, ("freeing bss node")); 510 511 TAILQ_REMOVE(&ic->ic_node, ni, ni_list); 512 LIST_REMOVE(ni, ni_hash); 513 if (TAILQ_EMPTY(&ic->ic_node)) 514 ic->ic_inact_timer = 0; 515 (*ic->ic_node_free)(ic, ni); 516 } 517 518 void 519 ieee80211_free_node(struct ieee80211com *ic, struct ieee80211_node *ni) 520 { 521 ieee80211_node_critsec_decl(s); 522 523 KASSERT(ni != ic->ic_bss, ("freeing ic_bss")); 524 525 if (ieee80211_node_decref(ni) == 0) { 526 ieee80211_node_critsec_begin(ic, s); 527 _ieee80211_free_node(ic, ni); 528 ieee80211_node_critsec_end(ic, s); 529 } 530 } 531 532 void 533 ieee80211_free_allnodes(struct ieee80211com *ic) 534 { 535 struct ieee80211_node *ni; 536 ieee80211_node_critsec_decl(s); 537 538 ieee80211_node_critsec_begin(ic, s); 539 while ((ni = TAILQ_FIRST(&ic->ic_node)) != NULL) 540 _ieee80211_free_node(ic, ni); 541 ieee80211_node_critsec_end(ic, s); 542 } 543 544 void 545 ieee80211_timeout_nodes(struct ieee80211com *ic) 546 { 547 struct ieee80211_node *ni, *nextbs; 548 ieee80211_node_critsec_decl(s); 549 550 ieee80211_node_critsec_begin(ic, s); 551 for (ni = TAILQ_FIRST(&ic->ic_node); ni != NULL;) { 552 if (++ni->ni_inact > IEEE80211_INACT_MAX) { 553 IEEE80211_DPRINTF(("station %s timed out " 554 "due to inactivity (%u secs)\n", 555 ether_sprintf(ni->ni_macaddr), 556 ni->ni_inact)); 557 nextbs = TAILQ_NEXT(ni, ni_list); 558 /* 559 * Send a deauthenticate frame. 560 */ 561 IEEE80211_SEND_MGMT(ic, ni, 562 IEEE80211_FC0_SUBTYPE_DEAUTH, 563 IEEE80211_REASON_AUTH_EXPIRE); 564 ieee80211_free_node(ic, ni); 565 ni = nextbs; 566 } else 567 ni = TAILQ_NEXT(ni, ni_list); 568 } 569 if (!TAILQ_EMPTY(&ic->ic_node)) 570 ic->ic_inact_timer = IEEE80211_INACT_WAIT; 571 ieee80211_node_critsec_end(ic, s); 572 } 573 574 void 575 ieee80211_iterate_nodes(struct ieee80211com *ic, ieee80211_iter_func *f, void *arg) 576 { 577 struct ieee80211_node *ni; 578 ieee80211_node_critsec_decl(s); 579 580 ieee80211_node_critsec_begin(ic, s); 581 TAILQ_FOREACH(ni, &ic->ic_node, ni_list) 582 (*f)(arg, ni); 583 ieee80211_node_critsec_end(ic, s); 584 } 585
Indexes created Wed Sep 24 14:09:57 GMT 2025