Annotation of sys/net80211/ieee80211_node.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ieee80211_node.c,v 1.28 2007/07/06 18:18:43 damien Exp $ */
! 2: /* $NetBSD: ieee80211_node.c,v 1.14 2004/05/09 09:18:47 dyoung Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 2001 Atsushi Onoe
! 6: * Copyright (c) 2002, 2003 Sam Leffler, Errno Consulting
! 7: * All rights reserved.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice, this list of conditions and the following disclaimer.
! 14: * 2. Redistributions in binary form must reproduce the above copyright
! 15: * notice, this list of conditions and the following disclaimer in the
! 16: * documentation and/or other materials provided with the distribution.
! 17: * 3. The name of the author may not be used to endorse or promote products
! 18: * derived from this software without specific prior written permission.
! 19: *
! 20: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 21: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 22: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 23: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 24: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 25: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 26: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 27: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 28: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 29: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 30: */
! 31:
! 32: #include "bpfilter.h"
! 33: #include "bridge.h"
! 34:
! 35: #include <sys/param.h>
! 36: #include <sys/systm.h>
! 37: #include <sys/mbuf.h>
! 38: #include <sys/malloc.h>
! 39: #include <sys/kernel.h>
! 40: #include <sys/socket.h>
! 41: #include <sys/sockio.h>
! 42: #include <sys/endian.h>
! 43: #include <sys/errno.h>
! 44: #include <sys/proc.h>
! 45: #include <sys/sysctl.h>
! 46: #include <sys/tree.h>
! 47:
! 48: #include <net/if.h>
! 49: #include <net/if_dl.h>
! 50: #include <net/if_media.h>
! 51: #include <net/if_arp.h>
! 52: #include <net/if_llc.h>
! 53:
! 54: #if NBPFILTER > 0
! 55: #include <net/bpf.h>
! 56: #endif
! 57:
! 58: #ifdef INET
! 59: #include <netinet/in.h>
! 60: #include <netinet/if_ether.h>
! 61: #endif
! 62:
! 63: #if NBRIDGE > 0
! 64: #include <net/if_bridge.h>
! 65: #endif
! 66:
! 67: #include <net80211/ieee80211_var.h>
! 68:
! 69: #include <dev/rndvar.h>
! 70:
! 71: struct ieee80211_node *ieee80211_node_alloc(struct ieee80211com *);
! 72: void ieee80211_node_free(struct ieee80211com *, struct ieee80211_node *);
! 73: void ieee80211_node_copy(struct ieee80211com *, struct ieee80211_node *,
! 74: const struct ieee80211_node *);
! 75: u_int8_t ieee80211_node_getrssi(struct ieee80211com *,
! 76: const struct ieee80211_node *);
! 77: void ieee80211_setup_node(struct ieee80211com *, struct ieee80211_node *,
! 78: const u_int8_t *);
! 79: void ieee80211_free_node(struct ieee80211com *, struct ieee80211_node *);
! 80: struct ieee80211_node *ieee80211_alloc_node_helper(struct ieee80211com *);
! 81: void ieee80211_node_cleanup(struct ieee80211com *, struct ieee80211_node *);
! 82: void ieee80211_node_join_11g(struct ieee80211com *, struct ieee80211_node *);
! 83: void ieee80211_node_leave_11g(struct ieee80211com *, struct ieee80211_node *);
! 84: void ieee80211_set_tim(struct ieee80211com *, int, int);
! 85:
! 86: #define M_80211_NODE M_DEVBUF
! 87:
! 88: void
! 89: ieee80211_node_attach(struct ifnet *ifp)
! 90: {
! 91: struct ieee80211com *ic = (void *)ifp;
! 92: int size;
! 93:
! 94: RB_INIT(&ic->ic_tree);
! 95: ic->ic_node_alloc = ieee80211_node_alloc;
! 96: ic->ic_node_free = ieee80211_node_free;
! 97: ic->ic_node_copy = ieee80211_node_copy;
! 98: ic->ic_node_getrssi = ieee80211_node_getrssi;
! 99: ic->ic_scangen = 1;
! 100: ic->ic_max_nnodes = ieee80211_cache_size;
! 101:
! 102: if (ic->ic_max_aid == 0)
! 103: ic->ic_max_aid = IEEE80211_AID_DEF;
! 104: else if (ic->ic_max_aid > IEEE80211_AID_MAX)
! 105: ic->ic_max_aid = IEEE80211_AID_MAX;
! 106: size = howmany(ic->ic_max_aid, 32) * sizeof(u_int32_t);
! 107: MALLOC(ic->ic_aid_bitmap, u_int32_t *, size, M_DEVBUF, M_NOWAIT);
! 108: if (ic->ic_aid_bitmap == NULL) {
! 109: /* XXX no way to recover */
! 110: printf("%s: no memory for AID bitmap!\n", __func__);
! 111: ic->ic_max_aid = 0;
! 112: } else
! 113: memset(ic->ic_aid_bitmap, 0, size);
! 114:
! 115: if (ic->ic_caps & (IEEE80211_C_HOSTAP | IEEE80211_C_IBSS)) {
! 116: ic->ic_tim_len = howmany(ic->ic_max_aid, 8);
! 117: MALLOC(ic->ic_tim_bitmap, u_int8_t *, ic->ic_tim_len, M_DEVBUF,
! 118: M_NOWAIT);
! 119: if (ic->ic_tim_bitmap == NULL) {
! 120: printf("%s: no memory for TIM bitmap!\n", __func__);
! 121: ic->ic_tim_len = 0;
! 122: } else {
! 123: memset(ic->ic_tim_bitmap, 0, ic->ic_tim_len);
! 124: ic->ic_set_tim = ieee80211_set_tim;
! 125: }
! 126: }
! 127: }
! 128:
! 129: struct ieee80211_node *
! 130: ieee80211_alloc_node_helper(struct ieee80211com *ic)
! 131: {
! 132: struct ieee80211_node *ni;
! 133: if (ic->ic_nnodes >= ic->ic_max_nnodes)
! 134: ieee80211_clean_nodes(ic);
! 135: if (ic->ic_nnodes >= ic->ic_max_nnodes)
! 136: return NULL;
! 137: ni = (*ic->ic_node_alloc)(ic);
! 138: if (ni != NULL)
! 139: ic->ic_nnodes++;
! 140: return ni;
! 141: }
! 142:
! 143: void
! 144: ieee80211_node_lateattach(struct ifnet *ifp)
! 145: {
! 146: struct ieee80211com *ic = (void *)ifp;
! 147: struct ieee80211_node *ni;
! 148:
! 149: ni = ieee80211_alloc_node_helper(ic);
! 150: if (ni == NULL)
! 151: panic("unable to setup inital BSS node");
! 152: ni->ni_chan = IEEE80211_CHAN_ANYC;
! 153: ic->ic_bss = ieee80211_ref_node(ni);
! 154: ic->ic_txpower = IEEE80211_TXPOWER_MAX;
! 155: }
! 156:
! 157: void
! 158: ieee80211_node_detach(struct ifnet *ifp)
! 159: {
! 160: struct ieee80211com *ic = (void *)ifp;
! 161:
! 162: if (ic->ic_bss != NULL) {
! 163: (*ic->ic_node_free)(ic, ic->ic_bss);
! 164: ic->ic_bss = NULL;
! 165: }
! 166: ieee80211_free_allnodes(ic);
! 167: if (ic->ic_aid_bitmap != NULL)
! 168: FREE(ic->ic_aid_bitmap, M_DEVBUF);
! 169: if (ic->ic_tim_bitmap != NULL)
! 170: FREE(ic->ic_tim_bitmap, M_DEVBUF);
! 171: }
! 172:
! 173: /*
! 174: * AP scanning support.
! 175: */
! 176:
! 177: /*
! 178: * Initialize the active channel set based on the set
! 179: * of available channels and the current PHY mode.
! 180: */
! 181: void
! 182: ieee80211_reset_scan(struct ifnet *ifp)
! 183: {
! 184: struct ieee80211com *ic = (void *)ifp;
! 185:
! 186: memcpy(ic->ic_chan_scan, ic->ic_chan_active,
! 187: sizeof(ic->ic_chan_active));
! 188: /* NB: hack, setup so next_scan starts with the first channel */
! 189: if (ic->ic_bss != NULL && ic->ic_bss->ni_chan == IEEE80211_CHAN_ANYC)
! 190: ic->ic_bss->ni_chan = &ic->ic_channels[IEEE80211_CHAN_MAX];
! 191: }
! 192:
! 193: /*
! 194: * Begin an active scan.
! 195: */
! 196: void
! 197: ieee80211_begin_scan(struct ifnet *ifp)
! 198: {
! 199: struct ieee80211com *ic = (void *)ifp;
! 200:
! 201: if (ic->ic_scan_lock & IEEE80211_SCAN_LOCKED)
! 202: return;
! 203: ic->ic_scan_lock |= IEEE80211_SCAN_LOCKED;
! 204:
! 205: /*
! 206: * In all but hostap mode scanning starts off in
! 207: * an active mode before switching to passive.
! 208: */
! 209: if (ic->ic_opmode != IEEE80211_M_HOSTAP) {
! 210: ic->ic_flags |= IEEE80211_F_ASCAN;
! 211: ic->ic_stats.is_scan_active++;
! 212: } else
! 213: ic->ic_stats.is_scan_passive++;
! 214: if (ifp->if_flags & IFF_DEBUG)
! 215: printf("%s: begin %s scan\n", ifp->if_xname,
! 216: (ic->ic_flags & IEEE80211_F_ASCAN) ?
! 217: "active" : "passive");
! 218:
! 219: /*
! 220: * Flush any previously seen AP's. Note that the latter
! 221: * assumes we don't act as both an AP and a station,
! 222: * otherwise we'll potentially flush state of stations
! 223: * associated with us.
! 224: */
! 225: ieee80211_free_allnodes(ic);
! 226:
! 227: /*
! 228: * Reset the current mode. Setting the current mode will also
! 229: * reset scan state.
! 230: */
! 231: if (IFM_MODE(ic->ic_media.ifm_cur->ifm_media) == IFM_AUTO)
! 232: ic->ic_curmode = IEEE80211_MODE_AUTO;
! 233: ieee80211_setmode(ic, ic->ic_curmode);
! 234:
! 235: ic->ic_scan_count = 0;
! 236:
! 237: /* Scan the next channel. */
! 238: ieee80211_next_scan(ifp);
! 239: }
! 240:
! 241: /*
! 242: * Switch to the next channel marked for scanning.
! 243: */
! 244: void
! 245: ieee80211_next_scan(struct ifnet *ifp)
! 246: {
! 247: struct ieee80211com *ic = (void *)ifp;
! 248: struct ieee80211_channel *chan;
! 249:
! 250: chan = ic->ic_bss->ni_chan;
! 251: for (;;) {
! 252: if (++chan > &ic->ic_channels[IEEE80211_CHAN_MAX])
! 253: chan = &ic->ic_channels[0];
! 254: if (isset(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan))) {
! 255: /*
! 256: * Ignore channels marked passive-only
! 257: * during an active scan.
! 258: */
! 259: if ((ic->ic_flags & IEEE80211_F_ASCAN) == 0 ||
! 260: (chan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0)
! 261: break;
! 262: }
! 263: if (chan == ic->ic_bss->ni_chan) {
! 264: ieee80211_end_scan(ifp);
! 265: return;
! 266: }
! 267: }
! 268: clrbit(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan));
! 269: IEEE80211_DPRINTF(("%s: chan %d->%d\n", __func__,
! 270: ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan),
! 271: ieee80211_chan2ieee(ic, chan)));
! 272: ic->ic_bss->ni_chan = chan;
! 273: ieee80211_new_state(ic, IEEE80211_S_SCAN, -1);
! 274: }
! 275:
! 276: void
! 277: ieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan)
! 278: {
! 279: struct ieee80211_node *ni;
! 280: struct ifnet *ifp = &ic->ic_if;
! 281:
! 282: ni = ic->ic_bss;
! 283: if (ifp->if_flags & IFF_DEBUG)
! 284: printf("%s: creating ibss\n", ifp->if_xname);
! 285: ic->ic_flags |= IEEE80211_F_SIBSS;
! 286: ni->ni_chan = chan;
! 287: ni->ni_rates = ic->ic_sup_rates[ieee80211_chan2mode(ic, ni->ni_chan)];
! 288: IEEE80211_ADDR_COPY(ni->ni_macaddr, ic->ic_myaddr);
! 289: IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr);
! 290: if (ic->ic_opmode == IEEE80211_M_IBSS) {
! 291: if ((ic->ic_flags & IEEE80211_F_DESBSSID) != 0)
! 292: IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid);
! 293: else
! 294: ni->ni_bssid[0] |= 0x02; /* local bit for IBSS */
! 295: }
! 296: ni->ni_esslen = ic->ic_des_esslen;
! 297: memcpy(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen);
! 298: ni->ni_rssi = 0;
! 299: ni->ni_rstamp = 0;
! 300: memset(ni->ni_tstamp, 0, sizeof(ni->ni_tstamp));
! 301: ni->ni_intval = ic->ic_lintval;
! 302: ni->ni_capinfo = IEEE80211_CAPINFO_IBSS;
! 303: if (ic->ic_flags & IEEE80211_F_WEPON)
! 304: ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
! 305: if (ic->ic_phytype == IEEE80211_T_FH) {
! 306: ni->ni_fhdwell = 200; /* XXX */
! 307: ni->ni_fhindex = 1;
! 308: }
! 309: ieee80211_new_state(ic, IEEE80211_S_RUN, -1);
! 310: }
! 311:
! 312: int
! 313: ieee80211_match_bss(struct ieee80211com *ic, struct ieee80211_node *ni)
! 314: {
! 315: u_int8_t rate;
! 316: int fail;
! 317:
! 318: fail = 0;
! 319: if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
! 320: fail |= 0x01;
! 321: if (ic->ic_des_chan != IEEE80211_CHAN_ANYC &&
! 322: ni->ni_chan != ic->ic_des_chan)
! 323: fail |= 0x01;
! 324: if (ic->ic_opmode == IEEE80211_M_IBSS) {
! 325: if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
! 326: fail |= 0x02;
! 327: } else {
! 328: if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
! 329: fail |= 0x02;
! 330: }
! 331: if (ic->ic_flags & IEEE80211_F_WEPON) {
! 332: if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
! 333: fail |= 0x04;
! 334: } else {
! 335: /* XXX does this mean privacy is supported or required? */
! 336: if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
! 337: fail |= 0x04;
! 338: }
! 339: rate = ieee80211_fix_rate(ic, ni, IEEE80211_F_DONEGO);
! 340: if (rate & IEEE80211_RATE_BASIC)
! 341: fail |= 0x08;
! 342: if (ic->ic_des_esslen != 0 &&
! 343: (ni->ni_esslen != ic->ic_des_esslen ||
! 344: memcmp(ni->ni_essid, ic->ic_des_essid, ic->ic_des_esslen) != 0))
! 345: fail |= 0x10;
! 346: if ((ic->ic_flags & IEEE80211_F_DESBSSID) &&
! 347: !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid))
! 348: fail |= 0x20;
! 349: #ifdef IEEE80211_DEBUG
! 350: if (ic->ic_if.if_flags & IFF_DEBUG) {
! 351: printf(" %c %s", fail ? '-' : '+',
! 352: ether_sprintf(ni->ni_macaddr));
! 353: printf(" %s%c", ether_sprintf(ni->ni_bssid),
! 354: fail & 0x20 ? '!' : ' ');
! 355: printf(" %3d%c", ieee80211_chan2ieee(ic, ni->ni_chan),
! 356: fail & 0x01 ? '!' : ' ');
! 357: printf(" %+4d", ni->ni_rssi);
! 358: printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
! 359: fail & 0x08 ? '!' : ' ');
! 360: printf(" %4s%c",
! 361: (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
! 362: (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
! 363: "????",
! 364: fail & 0x02 ? '!' : ' ');
! 365: printf(" %3s%c ",
! 366: (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ?
! 367: "wep" : "no",
! 368: fail & 0x04 ? '!' : ' ');
! 369: ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
! 370: printf("%s\n", fail & 0x10 ? "!" : "");
! 371: }
! 372: #endif
! 373: return fail;
! 374: }
! 375:
! 376: /*
! 377: * Complete a scan of potential channels.
! 378: */
! 379: void
! 380: ieee80211_end_scan(struct ifnet *ifp)
! 381: {
! 382: struct ieee80211com *ic = (void *)ifp;
! 383: struct ieee80211_node *ni, *nextbs, *selbs;
! 384: int i, fail;
! 385:
! 386: if (ifp->if_flags & IFF_DEBUG)
! 387: printf("%s: end %s scan\n", ifp->if_xname,
! 388: (ic->ic_flags & IEEE80211_F_ASCAN) ?
! 389: "active" : "passive");
! 390:
! 391: if (ic->ic_scan_count)
! 392: ic->ic_flags &= ~IEEE80211_F_ASCAN;
! 393:
! 394: ni = RB_MIN(ieee80211_tree, &ic->ic_tree);
! 395:
! 396: if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
! 397: /* XXX off stack? */
! 398: u_char occupied[howmany(IEEE80211_CHAN_MAX, NBBY)];
! 399: /*
! 400: * The passive scan to look for existing AP's completed,
! 401: * select a channel to camp on. Identify the channels
! 402: * that already have one or more AP's and try to locate
! 403: * an unnoccupied one. If that fails, pick a random
! 404: * channel from the active set.
! 405: */
! 406: RB_FOREACH(ni, ieee80211_tree, &ic->ic_tree)
! 407: setbit(occupied, ieee80211_chan2ieee(ic, ni->ni_chan));
! 408: for (i = 0; i < IEEE80211_CHAN_MAX; i++)
! 409: if (isset(ic->ic_chan_active, i) && isclr(occupied, i))
! 410: break;
! 411: if (i == IEEE80211_CHAN_MAX) {
! 412: fail = arc4random() & 3; /* random 0-3 */
! 413: for (i = 0; i < IEEE80211_CHAN_MAX; i++)
! 414: if (isset(ic->ic_chan_active, i) && fail-- == 0)
! 415: break;
! 416: }
! 417: ieee80211_create_ibss(ic, &ic->ic_channels[i]);
! 418: goto wakeup;
! 419: }
! 420: if (ni == NULL) {
! 421: IEEE80211_DPRINTF(("%s: no scan candidate\n", __func__));
! 422: notfound:
! 423: if (ic->ic_opmode == IEEE80211_M_IBSS &&
! 424: (ic->ic_flags & IEEE80211_F_IBSSON) &&
! 425: ic->ic_des_esslen != 0) {
! 426: ieee80211_create_ibss(ic, ic->ic_ibss_chan);
! 427: goto wakeup;
! 428: }
! 429:
! 430: /*
! 431: * Scan the next mode if nothing has been found. This
! 432: * is necessary if the device supports different
! 433: * incompatible modes in the same channel range, like
! 434: * like 11b and "pure" 11G mode. This will loop
! 435: * forever except for user-initiated scans.
! 436: */
! 437: if (ieee80211_next_mode(ifp) == IEEE80211_MODE_AUTO) {
! 438: if (ic->ic_scan_lock & IEEE80211_SCAN_REQUEST &&
! 439: ic->ic_scan_lock & IEEE80211_SCAN_RESUME) {
! 440: ic->ic_scan_lock = IEEE80211_SCAN_LOCKED;
! 441: /* Return from an user-initiated scan */
! 442: wakeup(&ic->ic_scan_lock);
! 443: } else if (ic->ic_scan_lock & IEEE80211_SCAN_REQUEST)
! 444: goto wakeup;
! 445: ic->ic_scan_count++;
! 446: }
! 447:
! 448: /*
! 449: * Reset the list of channels to scan and start again.
! 450: */
! 451: ieee80211_next_scan(ifp);
! 452: return;
! 453: }
! 454: selbs = NULL;
! 455:
! 456: for (; ni != NULL; ni = nextbs) {
! 457: nextbs = RB_NEXT(ieee80211_tree, &ic->ic_tree, ni);
! 458: if (ni->ni_fails) {
! 459: /*
! 460: * The configuration of the access points may change
! 461: * during my scan. So delete the entry for the AP
! 462: * and retry to associate if there is another beacon.
! 463: */
! 464: if (ni->ni_fails++ > 2)
! 465: ieee80211_free_node(ic, ni);
! 466: continue;
! 467: }
! 468: if (ieee80211_match_bss(ic, ni) == 0) {
! 469: if (selbs == NULL)
! 470: selbs = ni;
! 471: else if (ni->ni_rssi > selbs->ni_rssi)
! 472: selbs = ni;
! 473: }
! 474: }
! 475: if (selbs == NULL)
! 476: goto notfound;
! 477: (*ic->ic_node_copy)(ic, ic->ic_bss, selbs);
! 478:
! 479: /*
! 480: * Set the erp state (mostly the slot time) to deal with
! 481: * the auto-select case; this should be redundant if the
! 482: * mode is locked.
! 483: */
! 484: ic->ic_curmode = ieee80211_chan2mode(ic, selbs->ni_chan);
! 485: ieee80211_reset_erp(ic);
! 486:
! 487: ieee80211_node_newstate(selbs, IEEE80211_STA_BSS);
! 488: if (ic->ic_opmode == IEEE80211_M_IBSS) {
! 489: ieee80211_fix_rate(ic, ic->ic_bss, IEEE80211_F_DOFRATE |
! 490: IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
! 491: if (ic->ic_bss->ni_rates.rs_nrates == 0)
! 492: goto notfound;
! 493: ieee80211_new_state(ic, IEEE80211_S_RUN, -1);
! 494: } else {
! 495: ieee80211_new_state(ic, IEEE80211_S_AUTH, -1);
! 496: }
! 497:
! 498: wakeup:
! 499: if (ic->ic_scan_lock & IEEE80211_SCAN_REQUEST) {
! 500: /* Return from an user-initiated scan */
! 501: wakeup(&ic->ic_scan_lock);
! 502: }
! 503:
! 504: ic->ic_scan_lock = IEEE80211_SCAN_UNLOCKED;
! 505: }
! 506:
! 507: int
! 508: ieee80211_get_rate(struct ieee80211com *ic)
! 509: {
! 510: u_int8_t (*rates)[IEEE80211_RATE_MAXSIZE];
! 511: int rate;
! 512:
! 513: rates = &ic->ic_bss->ni_rates.rs_rates;
! 514:
! 515: if (ic->ic_fixed_rate != -1)
! 516: rate = (*rates)[ic->ic_fixed_rate];
! 517: else if (ic->ic_state == IEEE80211_S_RUN)
! 518: rate = (*rates)[ic->ic_bss->ni_txrate];
! 519: else
! 520: rate = 0;
! 521:
! 522: return rate & IEEE80211_RATE_VAL;
! 523: }
! 524:
! 525: struct ieee80211_node *
! 526: ieee80211_node_alloc(struct ieee80211com *ic)
! 527: {
! 528: struct ieee80211_node *ni;
! 529: MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node),
! 530: M_80211_NODE, M_NOWAIT);
! 531: if (ni != NULL)
! 532: memset(ni, 0, sizeof(struct ieee80211_node));
! 533: return ni;
! 534: }
! 535:
! 536: void
! 537: ieee80211_node_cleanup(struct ieee80211com *ic, struct ieee80211_node *ni)
! 538: {
! 539: }
! 540:
! 541: void
! 542: ieee80211_node_free(struct ieee80211com *ic, struct ieee80211_node *ni)
! 543: {
! 544: ieee80211_node_cleanup(ic, ni);
! 545: FREE(ni, M_80211_NODE);
! 546: }
! 547:
! 548: void
! 549: ieee80211_node_copy(struct ieee80211com *ic,
! 550: struct ieee80211_node *dst, const struct ieee80211_node *src)
! 551: {
! 552: ieee80211_node_cleanup(ic, dst);
! 553: *dst = *src;
! 554: }
! 555:
! 556: u_int8_t
! 557: ieee80211_node_getrssi(struct ieee80211com *ic,
! 558: const struct ieee80211_node *ni)
! 559: {
! 560: return ni->ni_rssi;
! 561: }
! 562:
! 563: void
! 564: ieee80211_setup_node(struct ieee80211com *ic,
! 565: struct ieee80211_node *ni, const u_int8_t *macaddr)
! 566: {
! 567: int s;
! 568:
! 569: IEEE80211_DPRINTF(("%s %s\n", __func__,
! 570: ether_sprintf((u_int8_t *)macaddr)));
! 571: IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
! 572: ieee80211_node_newstate(ni, IEEE80211_STA_CACHE);
! 573:
! 574: /*
! 575: * Note we don't enable the inactive timer when acting
! 576: * as a station. Nodes created in this mode represent
! 577: * AP's identified while scanning. If we time them out
! 578: * then several things happen: we can't return the data
! 579: * to users to show the list of AP's we encountered, and
! 580: * more importantly, we'll incorrectly deauthenticate
! 581: * ourself because the inactivity timer will kick us off.
! 582: */
! 583: s = splnet();
! 584: if (ic->ic_opmode != IEEE80211_M_STA &&
! 585: RB_EMPTY(&ic->ic_tree))
! 586: ic->ic_inact_timer = IEEE80211_INACT_WAIT;
! 587: RB_INSERT(ieee80211_tree, &ic->ic_tree, ni);
! 588: splx(s);
! 589: }
! 590:
! 591: struct ieee80211_node *
! 592: ieee80211_alloc_node(struct ieee80211com *ic, const u_int8_t *macaddr)
! 593: {
! 594: struct ieee80211_node *ni = ieee80211_alloc_node_helper(ic);
! 595: if (ni != NULL)
! 596: ieee80211_setup_node(ic, ni, macaddr);
! 597: else
! 598: ic->ic_stats.is_rx_nodealloc++;
! 599: return ni;
! 600: }
! 601:
! 602: struct ieee80211_node *
! 603: ieee80211_dup_bss(struct ieee80211com *ic, const u_int8_t *macaddr)
! 604: {
! 605: struct ieee80211_node *ni = ieee80211_alloc_node_helper(ic);
! 606: if (ni != NULL) {
! 607: ieee80211_setup_node(ic, ni, macaddr);
! 608: /*
! 609: * Inherit from ic_bss.
! 610: */
! 611: IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid);
! 612: ni->ni_chan = ic->ic_bss->ni_chan;
! 613: } else
! 614: ic->ic_stats.is_rx_nodealloc++;
! 615: return ni;
! 616: }
! 617:
! 618: struct ieee80211_node *
! 619: ieee80211_find_node(struct ieee80211com *ic, const u_int8_t *macaddr)
! 620: {
! 621: struct ieee80211_node ni;
! 622:
! 623: IEEE80211_ADDR_COPY(ni.ni_macaddr, macaddr);
! 624: return (RB_FIND(ieee80211_tree, &ic->ic_tree, &ni));
! 625: }
! 626:
! 627: /*
! 628: * Return a reference to the appropriate node for sending
! 629: * a data frame. This handles node discovery in adhoc networks.
! 630: *
! 631: * Drivers will call this, so increase the reference count before
! 632: * returning the node.
! 633: */
! 634: struct ieee80211_node *
! 635: ieee80211_find_txnode(struct ieee80211com *ic, const u_int8_t *macaddr)
! 636: {
! 637: struct ieee80211_node *ni;
! 638: int s;
! 639:
! 640: /*
! 641: * The destination address should be in the node table
! 642: * unless we are operating in station mode or this is a
! 643: * multicast/broadcast frame.
! 644: */
! 645: if (ic->ic_opmode == IEEE80211_M_STA || IEEE80211_IS_MULTICAST(macaddr))
! 646: return ieee80211_ref_node(ic->ic_bss);
! 647:
! 648: s = splnet();
! 649: ni = ieee80211_find_node(ic, macaddr);
! 650: splx(s);
! 651: if (ni == NULL) {
! 652: if (ic->ic_opmode != IEEE80211_M_IBSS &&
! 653: ic->ic_opmode != IEEE80211_M_AHDEMO)
! 654: return NULL;
! 655:
! 656: /*
! 657: * Fake up a node; this handles node discovery in
! 658: * adhoc mode. Note that for the driver's benefit
! 659: * we we treat this like an association so the driver
! 660: * has an opportunity to setup its private state.
! 661: *
! 662: * XXX need better way to handle this; issue probe
! 663: * request so we can deduce rate set, etc.
! 664: */
! 665: if ((ni = ieee80211_dup_bss(ic, macaddr)) == NULL)
! 666: return NULL;
! 667: /* XXX no rate negotiation; just dup */
! 668: ni->ni_rates = ic->ic_bss->ni_rates;
! 669: if (ic->ic_newassoc)
! 670: (*ic->ic_newassoc)(ic, ni, 1);
! 671: }
! 672: return ieee80211_ref_node(ni);
! 673: }
! 674:
! 675: /*
! 676: * It is usually desirable to process a Rx packet using its sender's
! 677: * node-record instead of the BSS record.
! 678: *
! 679: * - AP mode: keep a node-record for every authenticated/associated
! 680: * station *in the BSS*. For future use, we also track neighboring
! 681: * APs, since they might belong to the same ESS. APs in the same
! 682: * ESS may bridge packets to each other, forming a Wireless
! 683: * Distribution System (WDS).
! 684: *
! 685: * - IBSS mode: keep a node-record for every station *in the BSS*.
! 686: * Also track neighboring stations by their beacons/probe responses.
! 687: *
! 688: * - monitor mode: keep a node-record for every sender, regardless
! 689: * of BSS.
! 690: *
! 691: * - STA mode: the only available node-record is the BSS record,
! 692: * ic->ic_bss.
! 693: *
! 694: * Of all the 802.11 Control packets, only the node-records for
! 695: * RTS packets node-record can be looked up.
! 696: *
! 697: * Return non-zero if the packet's node-record is kept, zero
! 698: * otherwise.
! 699: */
! 700: static __inline int
! 701: ieee80211_needs_rxnode(struct ieee80211com *ic,
! 702: const struct ieee80211_frame *wh, const u_int8_t **bssid)
! 703: {
! 704: struct ieee80211_node *bss = ic->ic_bss;
! 705: int monitor, rc = 0;
! 706:
! 707: monitor = (ic->ic_opmode == IEEE80211_M_MONITOR);
! 708:
! 709: *bssid = NULL;
! 710:
! 711: switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
! 712: case IEEE80211_FC0_TYPE_CTL:
! 713: if (!monitor)
! 714: break;
! 715: return (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) ==
! 716: IEEE80211_FC0_SUBTYPE_RTS;
! 717: case IEEE80211_FC0_TYPE_MGT:
! 718: *bssid = wh->i_addr3;
! 719: switch (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) {
! 720: case IEEE80211_FC0_SUBTYPE_BEACON:
! 721: case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
! 722: rc = 1;
! 723: break;
! 724: default:
! 725: if (ic->ic_opmode == IEEE80211_M_STA)
! 726: break;
! 727: rc = IEEE80211_ADDR_EQ(*bssid, bss->ni_bssid) ||
! 728: IEEE80211_ADDR_EQ(*bssid, etherbroadcastaddr);
! 729: break;
! 730: }
! 731: break;
! 732: case IEEE80211_FC0_TYPE_DATA:
! 733: switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
! 734: case IEEE80211_FC1_DIR_NODS:
! 735: *bssid = wh->i_addr3;
! 736: if (ic->ic_opmode == IEEE80211_M_IBSS ||
! 737: ic->ic_opmode == IEEE80211_M_AHDEMO)
! 738: rc = IEEE80211_ADDR_EQ(*bssid, bss->ni_bssid);
! 739: break;
! 740: case IEEE80211_FC1_DIR_TODS:
! 741: *bssid = wh->i_addr1;
! 742: if (ic->ic_opmode == IEEE80211_M_HOSTAP)
! 743: rc = IEEE80211_ADDR_EQ(*bssid, bss->ni_bssid);
! 744: break;
! 745: case IEEE80211_FC1_DIR_FROMDS:
! 746: case IEEE80211_FC1_DIR_DSTODS:
! 747: *bssid = wh->i_addr2;
! 748: rc = (ic->ic_opmode == IEEE80211_M_HOSTAP);
! 749: break;
! 750: }
! 751: break;
! 752: }
! 753: return monitor || rc;
! 754: }
! 755:
! 756: /*
! 757: * Drivers call this, so increase the reference count before returning
! 758: * the node.
! 759: */
! 760: struct ieee80211_node *
! 761: ieee80211_find_rxnode(struct ieee80211com *ic,
! 762: const struct ieee80211_frame *wh)
! 763: {
! 764: static const u_int8_t zero[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
! 765: struct ieee80211_node *ni;
! 766: const u_int8_t *bssid;
! 767: int s;
! 768:
! 769: if (!ieee80211_needs_rxnode(ic, wh, &bssid))
! 770: return ieee80211_ref_node(ic->ic_bss);
! 771:
! 772: s = splnet();
! 773: ni = ieee80211_find_node(ic, wh->i_addr2);
! 774: splx(s);
! 775:
! 776: if (ni != NULL)
! 777: return ieee80211_ref_node(ni);
! 778: if (ic->ic_opmode == IEEE80211_M_HOSTAP)
! 779: return ieee80211_ref_node(ic->ic_bss);
! 780:
! 781: /* XXX see remarks in ieee80211_find_txnode */
! 782: /* XXX no rate negotiation; just dup */
! 783: if ((ni = ieee80211_dup_bss(ic, wh->i_addr2)) == NULL)
! 784: return ieee80211_ref_node(ic->ic_bss);
! 785:
! 786: IEEE80211_ADDR_COPY(ni->ni_bssid, (bssid != NULL) ? bssid : zero);
! 787:
! 788: ni->ni_rates = ic->ic_bss->ni_rates;
! 789: if (ic->ic_newassoc)
! 790: (*ic->ic_newassoc)(ic, ni, 1);
! 791:
! 792: IEEE80211_DPRINTF(("%s: faked-up node %p for %s\n", __func__, ni,
! 793: ether_sprintf((u_int8_t *)wh->i_addr2)));
! 794:
! 795: return ieee80211_ref_node(ni);
! 796: }
! 797:
! 798: struct ieee80211_node *
! 799: ieee80211_find_node_for_beacon(struct ieee80211com *ic,
! 800: const u_int8_t *macaddr, const struct ieee80211_channel *chan,
! 801: const char *ssid, u_int8_t rssi)
! 802: {
! 803: struct ieee80211_node *ni, *keep = NULL;
! 804: int s, score = 0;
! 805:
! 806: if ((ni = ieee80211_find_node(ic, macaddr)) != NULL) {
! 807: s = splnet();
! 808:
! 809: if (ni->ni_chan != chan && ni->ni_rssi >= rssi)
! 810: score++;
! 811: if (ssid[1] == 0 && ni->ni_esslen != 0)
! 812: score++;
! 813: if (score > 0)
! 814: keep = ni;
! 815:
! 816: splx(s);
! 817: }
! 818:
! 819: return (keep);
! 820: }
! 821:
! 822: void
! 823: ieee80211_free_node(struct ieee80211com *ic, struct ieee80211_node *ni)
! 824: {
! 825: if (ni == ic->ic_bss)
! 826: panic("freeing bss node");
! 827:
! 828: IEEE80211_DPRINTF(("%s %s\n", __func__, ether_sprintf(ni->ni_macaddr)));
! 829: IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap);
! 830: RB_REMOVE(ieee80211_tree, &ic->ic_tree, ni);
! 831: ic->ic_nnodes--;
! 832: if (!IF_IS_EMPTY(&ni->ni_savedq)) {
! 833: IF_PURGE(&ni->ni_savedq);
! 834: if (ic->ic_set_tim != NULL)
! 835: (*ic->ic_set_tim)(ic, ni->ni_associd, 0);
! 836: }
! 837: if (RB_EMPTY(&ic->ic_tree))
! 838: ic->ic_inact_timer = 0;
! 839: (*ic->ic_node_free)(ic, ni);
! 840: /* TBD indicate to drivers that a new node can be allocated */
! 841: }
! 842:
! 843: void
! 844: ieee80211_release_node(struct ieee80211com *ic, struct ieee80211_node *ni)
! 845: {
! 846: int s;
! 847:
! 848: IEEE80211_DPRINTF(("%s %s refcnt %d\n", __func__,
! 849: ether_sprintf(ni->ni_macaddr), ni->ni_refcnt));
! 850: if (ieee80211_node_decref(ni) == 0 &&
! 851: ni->ni_state == IEEE80211_STA_COLLECT) {
! 852: s = splnet();
! 853: ieee80211_free_node(ic, ni);
! 854: splx(s);
! 855: }
! 856: }
! 857:
! 858: void
! 859: ieee80211_free_allnodes(struct ieee80211com *ic)
! 860: {
! 861: struct ieee80211_node *ni;
! 862: int s;
! 863:
! 864: IEEE80211_DPRINTF(("%s\n", __func__));
! 865: s = splnet();
! 866: while ((ni = RB_MIN(ieee80211_tree, &ic->ic_tree)) != NULL)
! 867: ieee80211_free_node(ic, ni);
! 868: splx(s);
! 869:
! 870: if (ic->ic_bss != NULL)
! 871: ieee80211_node_cleanup(ic, ic->ic_bss); /* for station mode */
! 872: }
! 873:
! 874: /*
! 875: * Timeout inactive nodes.
! 876: */
! 877: void
! 878: ieee80211_clean_nodes(struct ieee80211com *ic)
! 879: {
! 880: struct ieee80211_node *ni, *next_ni;
! 881: u_int gen = ic->ic_scangen++; /* NB: ok 'cuz single-threaded*/
! 882: int s;
! 883:
! 884: s = splnet();
! 885: for (ni = RB_MIN(ieee80211_tree, &ic->ic_tree);
! 886: ni != NULL; ni = next_ni) {
! 887: next_ni = RB_NEXT(ieee80211_tree, &ic->ic_tree, ni);
! 888: if (ic->ic_nnodes <= ic->ic_max_nnodes)
! 889: break;
! 890: if (ni->ni_scangen == gen) /* previously handled */
! 891: continue;
! 892: ni->ni_scangen = gen;
! 893: if (ni->ni_refcnt > 0)
! 894: continue;
! 895: IEEE80211_DPRINTF(("station %s purged from LRU cache\n",
! 896: ether_sprintf(ni->ni_macaddr)));
! 897: /*
! 898: * Send a deauthenticate frame.
! 899: */
! 900: if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
! 901: splx(s);
! 902: IEEE80211_SEND_MGMT(ic, ni,
! 903: IEEE80211_FC0_SUBTYPE_DEAUTH,
! 904: IEEE80211_REASON_AUTH_EXPIRE);
! 905: s = splnet();
! 906: ieee80211_node_leave(ic, ni);
! 907: } else
! 908: ieee80211_free_node(ic, ni);
! 909: ic->ic_stats.is_node_timeout++;
! 910: }
! 911: splx(s);
! 912: }
! 913:
! 914: void
! 915: ieee80211_iterate_nodes(struct ieee80211com *ic, ieee80211_iter_func *f,
! 916: void *arg)
! 917: {
! 918: struct ieee80211_node *ni;
! 919: int s;
! 920:
! 921: s = splnet();
! 922: RB_FOREACH(ni, ieee80211_tree, &ic->ic_tree)
! 923: (*f)(arg, ni);
! 924: splx(s);
! 925: }
! 926:
! 927: /*
! 928: * Check if the specified node supports ERP.
! 929: */
! 930: int
! 931: ieee80211_iserp_sta(const struct ieee80211_node *ni)
! 932: {
! 933: #define N(a) (sizeof (a) / sizeof (a)[0])
! 934: static const u_int8_t rates[] = { 2, 4, 11, 22, 12, 24, 48 };
! 935: const struct ieee80211_rateset *rs = &ni->ni_rates;
! 936: int i, j;
! 937:
! 938: /*
! 939: * A STA supports ERP operation if it includes all the Clause 19
! 940: * mandatory rates in its supported rate set.
! 941: */
! 942: for (i = 0; i < N(rates); i++) {
! 943: for (j = 0; j < rs->rs_nrates; j++) {
! 944: if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == rates[i])
! 945: break;
! 946: }
! 947: if (j == rs->rs_nrates)
! 948: return 0;
! 949: }
! 950: return 1;
! 951: #undef N
! 952: }
! 953:
! 954: /*
! 955: * Handle a station joining an 11g network.
! 956: */
! 957: void
! 958: ieee80211_node_join_11g(struct ieee80211com *ic, struct ieee80211_node *ni)
! 959: {
! 960: if (!(ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)) {
! 961: /*
! 962: * Joining STA doesn't support short slot time. We must
! 963: * disable the use of short slot time for all other associated
! 964: * STAs and give the driver a chance to reconfigure the
! 965: * hardware.
! 966: */
! 967: if (++ic->ic_longslotsta == 1) {
! 968: if (ic->ic_caps & IEEE80211_C_SHSLOT)
! 969: ieee80211_set_shortslottime(ic, 0);
! 970: }
! 971: IEEE80211_DPRINTF(("[%s] station needs long slot time, "
! 972: "count %d\n", ether_sprintf(ni->ni_macaddr),
! 973: ic->ic_longslotsta));
! 974: }
! 975:
! 976: if (!ieee80211_iserp_sta(ni)) {
! 977: /*
! 978: * Joining STA is non-ERP.
! 979: */
! 980: ic->ic_nonerpsta++;
! 981:
! 982: IEEE80211_DPRINTF(("[%s] station is non-ERP, %d non-ERP "
! 983: "stations associated\n", ether_sprintf(ni->ni_macaddr),
! 984: ic->ic_nonerpsta));
! 985:
! 986: /* must enable the use of protection */
! 987: if (ic->ic_protmode != IEEE80211_PROT_NONE) {
! 988: IEEE80211_DPRINTF(("%s: enable use of protection\n",
! 989: __func__));
! 990: ic->ic_flags |= IEEE80211_F_USEPROT;
! 991: }
! 992:
! 993: if (!(ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE))
! 994: ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
! 995: } else
! 996: ni->ni_flags |= IEEE80211_NODE_ERP;
! 997: }
! 998:
! 999: void
! 1000: ieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni,
! 1001: int resp)
! 1002: {
! 1003: int newassoc;
! 1004:
! 1005: if (ni->ni_associd == 0) {
! 1006: u_int16_t aid;
! 1007:
! 1008: /*
! 1009: * It would be clever to search the bitmap
! 1010: * more efficiently, but this will do for now.
! 1011: */
! 1012: for (aid = 1; aid < ic->ic_max_aid; aid++) {
! 1013: if (!IEEE80211_AID_ISSET(aid,
! 1014: ic->ic_aid_bitmap))
! 1015: break;
! 1016: }
! 1017: if (aid >= ic->ic_max_aid) {
! 1018: IEEE80211_SEND_MGMT(ic, ni, resp,
! 1019: IEEE80211_REASON_ASSOC_TOOMANY);
! 1020: ieee80211_node_leave(ic, ni);
! 1021: return;
! 1022: }
! 1023: ni->ni_associd = aid | 0xc000;
! 1024: IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap);
! 1025: newassoc = 1;
! 1026: if (ic->ic_curmode == IEEE80211_MODE_11G)
! 1027: ieee80211_node_join_11g(ic, ni);
! 1028: } else
! 1029: newassoc = 0;
! 1030:
! 1031: IEEE80211_DPRINTF(("station %s %s associated at aid %d\n",
! 1032: ether_sprintf(ni->ni_macaddr),
! 1033: (newassoc ? "newly" : "already"),
! 1034: ni->ni_associd & ~0xc000));
! 1035:
! 1036: /* give driver a chance to setup state like ni_txrate */
! 1037: if (ic->ic_newassoc)
! 1038: (*ic->ic_newassoc)(ic, ni, newassoc);
! 1039: IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS);
! 1040: ieee80211_node_newstate(ni, IEEE80211_STA_ASSOC);
! 1041:
! 1042: #if NBRIDGE > 0
! 1043: /*
! 1044: * If the parent interface belongs to a bridge, learn
! 1045: * the node's address dynamically on this interface.
! 1046: */
! 1047: if (ic->ic_if.if_bridge != NULL)
! 1048: bridge_update(&ic->ic_if,
! 1049: (struct ether_addr *)ni->ni_macaddr, 0);
! 1050: #endif
! 1051: }
! 1052:
! 1053: /*
! 1054: * Handle a station leaving an 11g network.
! 1055: */
! 1056: void
! 1057: ieee80211_node_leave_11g(struct ieee80211com *ic, struct ieee80211_node *ni)
! 1058: {
! 1059: if (!(ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)) {
! 1060: #ifdef DIAGNOSTIC
! 1061: if (ic->ic_longslotsta == 0) {
! 1062: panic("bogus long slot station count %d",
! 1063: ic->ic_longslotsta);
! 1064: }
! 1065: #endif
! 1066: /* leaving STA did not support short slot time */
! 1067: if (--ic->ic_longslotsta == 0) {
! 1068: /*
! 1069: * All associated STAs now support short slot time, so
! 1070: * enable this feature and give the driver a chance to
! 1071: * reconfigure the hardware. Notice that IBSS always
! 1072: * use a long slot time.
! 1073: */
! 1074: if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
! 1075: ic->ic_opmode != IEEE80211_M_IBSS)
! 1076: ieee80211_set_shortslottime(ic, 1);
! 1077: }
! 1078: IEEE80211_DPRINTF(("[%s] long slot time station leaves, "
! 1079: "count now %d\n", ether_sprintf(ni->ni_macaddr),
! 1080: ic->ic_longslotsta));
! 1081: }
! 1082:
! 1083: if (!(ni->ni_flags & IEEE80211_NODE_ERP)) {
! 1084: #ifdef DIAGNOSTIC
! 1085: if (ic->ic_nonerpsta == 0) {
! 1086: panic("bogus non-ERP station count %d\n",
! 1087: ic->ic_nonerpsta);
! 1088: }
! 1089: #endif
! 1090: /* leaving STA was non-ERP */
! 1091: if (--ic->ic_nonerpsta == 0) {
! 1092: /*
! 1093: * All associated STAs are now ERP capable, disable use
! 1094: * of protection and re-enable short preamble support.
! 1095: */
! 1096: ic->ic_flags &= ~IEEE80211_F_USEPROT;
! 1097: if (ic->ic_caps & IEEE80211_C_SHPREAMBLE)
! 1098: ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
! 1099: }
! 1100: IEEE80211_DPRINTF(("[%s] non-ERP station leaves, "
! 1101: "count now %d\n", ether_sprintf(ni->ni_macaddr),
! 1102: ic->ic_nonerpsta));
! 1103: }
! 1104: }
! 1105:
! 1106: /*
! 1107: * Handle bookkeeping for station deauthentication/disassociation
! 1108: * when operating as an ap.
! 1109: */
! 1110: void
! 1111: ieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni)
! 1112: {
! 1113: if (ic->ic_opmode != IEEE80211_M_HOSTAP)
! 1114: panic("not in ap mode, mode %u", ic->ic_opmode);
! 1115: /*
! 1116: * If node wasn't previously associated all
! 1117: * we need to do is reclaim the reference.
! 1118: */
! 1119: if (ni->ni_associd == 0)
! 1120: return;
! 1121: IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap);
! 1122: ni->ni_associd = 0;
! 1123:
! 1124: if (ic->ic_curmode == IEEE80211_MODE_11G)
! 1125: ieee80211_node_leave_11g(ic, ni);
! 1126:
! 1127: ieee80211_node_newstate(ni, IEEE80211_STA_COLLECT);
! 1128:
! 1129: #if NBRIDGE > 0
! 1130: /*
! 1131: * If the parent interface belongs to a bridge, delete
! 1132: * any dynamically learned address for this node.
! 1133: */
! 1134: if (ic->ic_if.if_bridge != NULL)
! 1135: bridge_update(&ic->ic_if,
! 1136: (struct ether_addr *)ni->ni_macaddr, 1);
! 1137: #endif
! 1138: }
! 1139:
! 1140: void
! 1141: ieee80211_set_tim(struct ieee80211com *ic, int aid, int set)
! 1142: {
! 1143: if (set)
! 1144: setbit(ic->ic_tim_bitmap, aid & ~0xc000);
! 1145: else
! 1146: clrbit(ic->ic_tim_bitmap, aid & ~0xc000);
! 1147: }
! 1148:
! 1149: /*
! 1150: * Compare nodes in the tree by lladdr
! 1151: */
! 1152: int
! 1153: ieee80211_node_cmp(const struct ieee80211_node *b1,
! 1154: const struct ieee80211_node *b2)
! 1155: {
! 1156: return (memcmp(b1->ni_macaddr, b2->ni_macaddr, IEEE80211_ADDR_LEN));
! 1157: }
! 1158:
! 1159: /*
! 1160: * Generate red-black tree function logic
! 1161: */
! 1162: RB_GENERATE(ieee80211_tree, ieee80211_node, ni_node, ieee80211_node_cmp);
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