294 mode = IEEE80211_MODE_11G;
295 if (mode == IEEE80211_MODE_11G &&
296 (vap->iv_flags & IEEE80211_F_PUREG) == 0)
297 mode = IEEE80211_MODE_11B;
298 }
299 ni->ni_txparms = &vap->iv_txparms[mode];
300 ni->ni_rates = *ieee80211_get_suprates(ic, chan);
301}
302
303static __inline void
304copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss)
305{
306 /* propagate useful state */
307 nbss->ni_authmode = obss->ni_authmode;
308 nbss->ni_txpower = obss->ni_txpower;
309 nbss->ni_vlan = obss->ni_vlan;
310 /* XXX statistics? */
311 /* XXX legacy WDS bssid? */
312}
313
314void
315ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan)
316{
317 struct ieee80211com *ic = vap->iv_ic;
318 struct ieee80211_node *ni;
319
320 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
321 "%s: creating ibss on channel %u\n", __func__,
322 ieee80211_chan2ieee(ic, chan));
323
324 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
325 if (ni == NULL) {
326 /* XXX recovery? */
327 return;
328 }
329 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
330 ni->ni_esslen = vap->iv_des_ssid[0].len;
331 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
332 if (vap->iv_bss != NULL)
333 copy_bss(ni, vap->iv_bss);
334 ni->ni_intval = ic->ic_bintval;
335 if (vap->iv_flags & IEEE80211_F_PRIVACY)
336 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
337 if (ic->ic_phytype == IEEE80211_T_FH) {
338 ni->ni_fhdwell = 200; /* XXX */
339 ni->ni_fhindex = 1;
340 }
341 if (vap->iv_opmode == IEEE80211_M_IBSS) {
342 vap->iv_flags |= IEEE80211_F_SIBSS;
343 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */
344 if (vap->iv_flags & IEEE80211_F_DESBSSID)
345 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
346 else {
347 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN);
348 /* clear group bit, add local bit */
349 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02;
350 }
351 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
352 if (vap->iv_flags & IEEE80211_F_DESBSSID)
353 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
354 else
355#ifdef IEEE80211_SUPPORT_TDMA
356 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0)
357#endif
358 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN);
359 }
360 /*
361 * Fix the channel and related attributes.
362 */
363 /* clear DFS CAC state on previous channel */
364 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
365 ic->ic_bsschan->ic_freq != chan->ic_freq &&
366 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan))
367 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan);
368 ic->ic_bsschan = chan;
369 ieee80211_node_set_chan(ni, chan);
370 ic->ic_curmode = ieee80211_chan2mode(chan);
371 /*
372 * Do mode-specific setup.
373 */
374 if (IEEE80211_IS_CHAN_FULL(chan)) {
375 if (IEEE80211_IS_CHAN_ANYG(chan)) {
376 /*
377 * Use a mixed 11b/11g basic rate set.
378 */
379 ieee80211_setbasicrates(&ni->ni_rates,
380 IEEE80211_MODE_11G);
381 if (vap->iv_flags & IEEE80211_F_PUREG) {
382 /*
383 * Also mark OFDM rates basic so 11b
384 * stations do not join (WiFi compliance).
385 */
386 ieee80211_addbasicrates(&ni->ni_rates,
387 IEEE80211_MODE_11A);
388 }
389 } else if (IEEE80211_IS_CHAN_B(chan)) {
390 /*
391 * Force pure 11b rate set.
392 */
393 ieee80211_setbasicrates(&ni->ni_rates,
394 IEEE80211_MODE_11B);
395 }
396 }
397
398 (void) ieee80211_sta_join1(ieee80211_ref_node(ni));
399}
400
401/*
402 * Reset bss state on transition to the INIT state.
403 * Clear any stations from the table (they have been
404 * deauth'd) and reset the bss node (clears key, rate
405 * etc. state).
406 */
407void
408ieee80211_reset_bss(struct ieee80211vap *vap)
409{
410 struct ieee80211com *ic = vap->iv_ic;
411 struct ieee80211_node *ni, *obss;
412
413 ieee80211_node_table_reset(&ic->ic_sta, vap);
414 /* XXX multi-bss: wrong */
415 ieee80211_reset_erp(ic);
416
417 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
418 KASSERT(ni != NULL, ("unable to setup inital BSS node"));
419 obss = vap->iv_bss;
420 vap->iv_bss = ieee80211_ref_node(ni);
421 if (obss != NULL) {
422 copy_bss(ni, obss);
423 ni->ni_intval = ic->ic_bintval;
424 ieee80211_free_node(obss);
425 } else
426 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
427}
428
429static int
430match_ssid(const struct ieee80211_node *ni,
431 int nssid, const struct ieee80211_scan_ssid ssids[])
432{
433 int i;
434
435 for (i = 0; i < nssid; i++) {
436 if (ni->ni_esslen == ssids[i].len &&
437 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0)
438 return 1;
439 }
440 return 0;
441}
442
443/*
444 * Test a node for suitability/compatibility.
445 */
446static int
447check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni)
448{
449 struct ieee80211com *ic = ni->ni_ic;
450 uint8_t rate;
451
452 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
453 return 0;
454 if (vap->iv_opmode == IEEE80211_M_IBSS) {
455 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
456 return 0;
457 } else {
458 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
459 return 0;
460 }
461 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
462 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
463 return 0;
464 } else {
465 /* XXX does this mean privacy is supported or required? */
466 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
467 return 0;
468 }
469 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
470 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
471 if (rate & IEEE80211_RATE_BASIC)
472 return 0;
473 if (vap->iv_des_nssid != 0 &&
474 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
475 return 0;
476 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
477 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
478 return 0;
479 return 1;
480}
481
482#ifdef IEEE80211_DEBUG
483/*
484 * Display node suitability/compatibility.
485 */
486static void
487check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni)
488{
489 struct ieee80211com *ic = ni->ni_ic;
490 uint8_t rate;
491 int fail;
492
493 fail = 0;
494 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
495 fail |= 0x01;
496 if (vap->iv_opmode == IEEE80211_M_IBSS) {
497 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
498 fail |= 0x02;
499 } else {
500 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
501 fail |= 0x02;
502 }
503 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
504 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
505 fail |= 0x04;
506 } else {
507 /* XXX does this mean privacy is supported or required? */
508 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
509 fail |= 0x04;
510 }
511 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
512 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
513 if (rate & IEEE80211_RATE_BASIC)
514 fail |= 0x08;
515 if (vap->iv_des_nssid != 0 &&
516 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
517 fail |= 0x10;
518 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
519 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
520 fail |= 0x20;
521
522 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr));
523 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' ');
524 printf(" %3d%c",
525 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' ');
526 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
527 fail & 0x08 ? '!' : ' ');
528 printf(" %4s%c",
529 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
530 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
531 "????",
532 fail & 0x02 ? '!' : ' ');
533 printf(" %3s%c ",
534 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no",
535 fail & 0x04 ? '!' : ' ');
536 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
537 printf("%s\n", fail & 0x10 ? "!" : "");
538}
539#endif /* IEEE80211_DEBUG */
540
541/*
542 * Handle 802.11 ad hoc network merge. The
543 * convention, set by the Wireless Ethernet Compatibility Alliance
544 * (WECA), is that an 802.11 station will change its BSSID to match
545 * the "oldest" 802.11 ad hoc network, on the same channel, that
546 * has the station's desired SSID. The "oldest" 802.11 network
547 * sends beacons with the greatest TSF timestamp.
548 *
549 * The caller is assumed to validate TSF's before attempting a merge.
550 *
551 * Return !0 if the BSSID changed, 0 otherwise.
552 */
553int
554ieee80211_ibss_merge(struct ieee80211_node *ni)
555{
556 struct ieee80211vap *vap = ni->ni_vap;
557#ifdef IEEE80211_DEBUG
558 struct ieee80211com *ic = ni->ni_ic;
559#endif
560
561 if (ni == vap->iv_bss ||
562 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
563 /* unchanged, nothing to do */
564 return 0;
565 }
566 if (!check_bss(vap, ni)) {
567 /* capabilities mismatch */
568 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
569 "%s: merge failed, capabilities mismatch\n", __func__);
570#ifdef IEEE80211_DEBUG
571 if (ieee80211_msg_assoc(vap))
572 check_bss_debug(vap, ni);
573#endif
574 vap->iv_stats.is_ibss_capmismatch++;
575 return 0;
576 }
577 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
578 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__,
579 ether_sprintf(ni->ni_bssid),
580 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
581 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
582 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : ""
583 );
584 return ieee80211_sta_join1(ieee80211_ref_node(ni));
585}
586
587/*
588 * Calculate HT channel promotion flags for all vaps.
589 * This assumes ni_chan have been setup for each vap.
590 */
591static int
592gethtadjustflags(struct ieee80211com *ic)
593{
594 struct ieee80211vap *vap;
595 int flags;
596
597 flags = 0;
598 /* XXX locking */
599 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
600 if (vap->iv_state < IEEE80211_S_RUN)
601 continue;
602 switch (vap->iv_opmode) {
603 case IEEE80211_M_WDS:
604 case IEEE80211_M_STA:
605 case IEEE80211_M_AHDEMO:
606 case IEEE80211_M_HOSTAP:
607 case IEEE80211_M_IBSS:
608 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan);
609 break;
610 default:
611 break;
612 }
613 }
614 return flags;
615}
616
617/*
618 * Check if the current channel needs to change based on whether
619 * any vap's are using HT20/HT40. This is used to sync the state
620 * of ic_curchan after a channel width change on a running vap.
621 */
622void
623ieee80211_sync_curchan(struct ieee80211com *ic)
624{
625 struct ieee80211_channel *c;
626
627 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic));
628 if (c != ic->ic_curchan) {
629 ic->ic_curchan = c;
630 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
631 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
632 IEEE80211_UNLOCK(ic);
633 ic->ic_set_channel(ic);
634 ieee80211_radiotap_chan_change(ic);
635 IEEE80211_LOCK(ic);
636 }
637}
638
639/*
640 * Setup the current channel. The request channel may be
641 * promoted if other vap's are operating with HT20/HT40.
642 */
643void
644ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
645{
646 if (ic->ic_htcaps & IEEE80211_HTC_HT) {
647 int flags = gethtadjustflags(ic);
648 /*
649 * Check for channel promotion required to support the
650 * set of running vap's. This assumes we are called
651 * after ni_chan is setup for each vap.
652 */
| 294 mode = IEEE80211_MODE_11G;
295 if (mode == IEEE80211_MODE_11G &&
296 (vap->iv_flags & IEEE80211_F_PUREG) == 0)
297 mode = IEEE80211_MODE_11B;
298 }
299 ni->ni_txparms = &vap->iv_txparms[mode];
300 ni->ni_rates = *ieee80211_get_suprates(ic, chan);
301}
302
303static __inline void
304copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss)
305{
306 /* propagate useful state */
307 nbss->ni_authmode = obss->ni_authmode;
308 nbss->ni_txpower = obss->ni_txpower;
309 nbss->ni_vlan = obss->ni_vlan;
310 /* XXX statistics? */
311 /* XXX legacy WDS bssid? */
312}
313
314void
315ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan)
316{
317 struct ieee80211com *ic = vap->iv_ic;
318 struct ieee80211_node *ni;
319
320 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
321 "%s: creating ibss on channel %u\n", __func__,
322 ieee80211_chan2ieee(ic, chan));
323
324 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
325 if (ni == NULL) {
326 /* XXX recovery? */
327 return;
328 }
329 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
330 ni->ni_esslen = vap->iv_des_ssid[0].len;
331 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
332 if (vap->iv_bss != NULL)
333 copy_bss(ni, vap->iv_bss);
334 ni->ni_intval = ic->ic_bintval;
335 if (vap->iv_flags & IEEE80211_F_PRIVACY)
336 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
337 if (ic->ic_phytype == IEEE80211_T_FH) {
338 ni->ni_fhdwell = 200; /* XXX */
339 ni->ni_fhindex = 1;
340 }
341 if (vap->iv_opmode == IEEE80211_M_IBSS) {
342 vap->iv_flags |= IEEE80211_F_SIBSS;
343 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */
344 if (vap->iv_flags & IEEE80211_F_DESBSSID)
345 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
346 else {
347 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN);
348 /* clear group bit, add local bit */
349 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02;
350 }
351 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
352 if (vap->iv_flags & IEEE80211_F_DESBSSID)
353 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid);
354 else
355#ifdef IEEE80211_SUPPORT_TDMA
356 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0)
357#endif
358 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN);
359 }
360 /*
361 * Fix the channel and related attributes.
362 */
363 /* clear DFS CAC state on previous channel */
364 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
365 ic->ic_bsschan->ic_freq != chan->ic_freq &&
366 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan))
367 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan);
368 ic->ic_bsschan = chan;
369 ieee80211_node_set_chan(ni, chan);
370 ic->ic_curmode = ieee80211_chan2mode(chan);
371 /*
372 * Do mode-specific setup.
373 */
374 if (IEEE80211_IS_CHAN_FULL(chan)) {
375 if (IEEE80211_IS_CHAN_ANYG(chan)) {
376 /*
377 * Use a mixed 11b/11g basic rate set.
378 */
379 ieee80211_setbasicrates(&ni->ni_rates,
380 IEEE80211_MODE_11G);
381 if (vap->iv_flags & IEEE80211_F_PUREG) {
382 /*
383 * Also mark OFDM rates basic so 11b
384 * stations do not join (WiFi compliance).
385 */
386 ieee80211_addbasicrates(&ni->ni_rates,
387 IEEE80211_MODE_11A);
388 }
389 } else if (IEEE80211_IS_CHAN_B(chan)) {
390 /*
391 * Force pure 11b rate set.
392 */
393 ieee80211_setbasicrates(&ni->ni_rates,
394 IEEE80211_MODE_11B);
395 }
396 }
397
398 (void) ieee80211_sta_join1(ieee80211_ref_node(ni));
399}
400
401/*
402 * Reset bss state on transition to the INIT state.
403 * Clear any stations from the table (they have been
404 * deauth'd) and reset the bss node (clears key, rate
405 * etc. state).
406 */
407void
408ieee80211_reset_bss(struct ieee80211vap *vap)
409{
410 struct ieee80211com *ic = vap->iv_ic;
411 struct ieee80211_node *ni, *obss;
412
413 ieee80211_node_table_reset(&ic->ic_sta, vap);
414 /* XXX multi-bss: wrong */
415 ieee80211_reset_erp(ic);
416
417 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr);
418 KASSERT(ni != NULL, ("unable to setup inital BSS node"));
419 obss = vap->iv_bss;
420 vap->iv_bss = ieee80211_ref_node(ni);
421 if (obss != NULL) {
422 copy_bss(ni, obss);
423 ni->ni_intval = ic->ic_bintval;
424 ieee80211_free_node(obss);
425 } else
426 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr);
427}
428
429static int
430match_ssid(const struct ieee80211_node *ni,
431 int nssid, const struct ieee80211_scan_ssid ssids[])
432{
433 int i;
434
435 for (i = 0; i < nssid; i++) {
436 if (ni->ni_esslen == ssids[i].len &&
437 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0)
438 return 1;
439 }
440 return 0;
441}
442
443/*
444 * Test a node for suitability/compatibility.
445 */
446static int
447check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni)
448{
449 struct ieee80211com *ic = ni->ni_ic;
450 uint8_t rate;
451
452 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
453 return 0;
454 if (vap->iv_opmode == IEEE80211_M_IBSS) {
455 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
456 return 0;
457 } else {
458 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
459 return 0;
460 }
461 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
462 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
463 return 0;
464 } else {
465 /* XXX does this mean privacy is supported or required? */
466 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
467 return 0;
468 }
469 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
470 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
471 if (rate & IEEE80211_RATE_BASIC)
472 return 0;
473 if (vap->iv_des_nssid != 0 &&
474 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
475 return 0;
476 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
477 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
478 return 0;
479 return 1;
480}
481
482#ifdef IEEE80211_DEBUG
483/*
484 * Display node suitability/compatibility.
485 */
486static void
487check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni)
488{
489 struct ieee80211com *ic = ni->ni_ic;
490 uint8_t rate;
491 int fail;
492
493 fail = 0;
494 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
495 fail |= 0x01;
496 if (vap->iv_opmode == IEEE80211_M_IBSS) {
497 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
498 fail |= 0x02;
499 } else {
500 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
501 fail |= 0x02;
502 }
503 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
504 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
505 fail |= 0x04;
506 } else {
507 /* XXX does this mean privacy is supported or required? */
508 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
509 fail |= 0x04;
510 }
511 rate = ieee80211_fix_rate(ni, &ni->ni_rates,
512 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
513 if (rate & IEEE80211_RATE_BASIC)
514 fail |= 0x08;
515 if (vap->iv_des_nssid != 0 &&
516 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid))
517 fail |= 0x10;
518 if ((vap->iv_flags & IEEE80211_F_DESBSSID) &&
519 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid))
520 fail |= 0x20;
521
522 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr));
523 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' ');
524 printf(" %3d%c",
525 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' ');
526 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
527 fail & 0x08 ? '!' : ' ');
528 printf(" %4s%c",
529 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
530 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
531 "????",
532 fail & 0x02 ? '!' : ' ');
533 printf(" %3s%c ",
534 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no",
535 fail & 0x04 ? '!' : ' ');
536 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
537 printf("%s\n", fail & 0x10 ? "!" : "");
538}
539#endif /* IEEE80211_DEBUG */
540
541/*
542 * Handle 802.11 ad hoc network merge. The
543 * convention, set by the Wireless Ethernet Compatibility Alliance
544 * (WECA), is that an 802.11 station will change its BSSID to match
545 * the "oldest" 802.11 ad hoc network, on the same channel, that
546 * has the station's desired SSID. The "oldest" 802.11 network
547 * sends beacons with the greatest TSF timestamp.
548 *
549 * The caller is assumed to validate TSF's before attempting a merge.
550 *
551 * Return !0 if the BSSID changed, 0 otherwise.
552 */
553int
554ieee80211_ibss_merge(struct ieee80211_node *ni)
555{
556 struct ieee80211vap *vap = ni->ni_vap;
557#ifdef IEEE80211_DEBUG
558 struct ieee80211com *ic = ni->ni_ic;
559#endif
560
561 if (ni == vap->iv_bss ||
562 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) {
563 /* unchanged, nothing to do */
564 return 0;
565 }
566 if (!check_bss(vap, ni)) {
567 /* capabilities mismatch */
568 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
569 "%s: merge failed, capabilities mismatch\n", __func__);
570#ifdef IEEE80211_DEBUG
571 if (ieee80211_msg_assoc(vap))
572 check_bss_debug(vap, ni);
573#endif
574 vap->iv_stats.is_ibss_capmismatch++;
575 return 0;
576 }
577 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC,
578 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__,
579 ether_sprintf(ni->ni_bssid),
580 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
581 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
582 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : ""
583 );
584 return ieee80211_sta_join1(ieee80211_ref_node(ni));
585}
586
587/*
588 * Calculate HT channel promotion flags for all vaps.
589 * This assumes ni_chan have been setup for each vap.
590 */
591static int
592gethtadjustflags(struct ieee80211com *ic)
593{
594 struct ieee80211vap *vap;
595 int flags;
596
597 flags = 0;
598 /* XXX locking */
599 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
600 if (vap->iv_state < IEEE80211_S_RUN)
601 continue;
602 switch (vap->iv_opmode) {
603 case IEEE80211_M_WDS:
604 case IEEE80211_M_STA:
605 case IEEE80211_M_AHDEMO:
606 case IEEE80211_M_HOSTAP:
607 case IEEE80211_M_IBSS:
608 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan);
609 break;
610 default:
611 break;
612 }
613 }
614 return flags;
615}
616
617/*
618 * Check if the current channel needs to change based on whether
619 * any vap's are using HT20/HT40. This is used to sync the state
620 * of ic_curchan after a channel width change on a running vap.
621 */
622void
623ieee80211_sync_curchan(struct ieee80211com *ic)
624{
625 struct ieee80211_channel *c;
626
627 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic));
628 if (c != ic->ic_curchan) {
629 ic->ic_curchan = c;
630 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
631 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
632 IEEE80211_UNLOCK(ic);
633 ic->ic_set_channel(ic);
634 ieee80211_radiotap_chan_change(ic);
635 IEEE80211_LOCK(ic);
636 }
637}
638
639/*
640 * Setup the current channel. The request channel may be
641 * promoted if other vap's are operating with HT20/HT40.
642 */
643void
644ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
645{
646 if (ic->ic_htcaps & IEEE80211_HTC_HT) {
647 int flags = gethtadjustflags(ic);
648 /*
649 * Check for channel promotion required to support the
650 * set of running vap's. This assumes we are called
651 * after ni_chan is setup for each vap.
652 */
|
654 if (flags > ieee80211_htchanflags(c))
655 c = ieee80211_ht_adjust_channel(ic, c, flags);
656 }
657 ic->ic_bsschan = ic->ic_curchan = c;
658 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
659 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
660}
661
662/*
663 * Change the current channel. The channel change is guaranteed to have
664 * happened before the next state change.
665 */
666void
667ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
668{
669 ieee80211_setupcurchan(ic, c);
670 ieee80211_runtask(ic, &ic->ic_chan_task);
671}
672
673/*
674 * Join the specified IBSS/BSS network. The node is assumed to
675 * be passed in with a held reference.
676 */
677static int
678ieee80211_sta_join1(struct ieee80211_node *selbs)
679{
680 struct ieee80211vap *vap = selbs->ni_vap;
681 struct ieee80211com *ic = selbs->ni_ic;
682 struct ieee80211_node *obss;
683 int canreassoc;
684
685 /*
686 * Committed to selbs, setup state.
687 */
688 obss = vap->iv_bss;
689 /*
690 * Check if old+new node have the same address in which
691 * case we can reassociate when operating in sta mode.
692 */
693 canreassoc = (obss != NULL &&
694 vap->iv_state == IEEE80211_S_RUN &&
695 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr));
696 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */
697 if (obss != NULL) {
698 copy_bss(selbs, obss);
699 ieee80211_node_decref(obss); /* iv_bss reference */
700 ieee80211_free_node(obss); /* station table reference */
701 obss = NULL; /* NB: guard against later use */
702 }
703
704 /*
705 * Delete unusable rates; we've already checked
706 * that the negotiated rate set is acceptable.
707 */
708 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates,
709 IEEE80211_F_DODEL | IEEE80211_F_JOIN);
710
711 ieee80211_setcurchan(ic, selbs->ni_chan);
712 /*
713 * Set the erp state (mostly the slot time) to deal with
714 * the auto-select case; this should be redundant if the
715 * mode is locked.
716 */
717 ieee80211_reset_erp(ic);
718 ieee80211_wme_initparams(vap);
719
720 if (vap->iv_opmode == IEEE80211_M_STA) {
721 if (canreassoc) {
722 /* Reassociate */
723 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
724 } else {
725 /*
726 * Act as if we received a DEAUTH frame in case we
727 * are invoked from the RUN state. This will cause
728 * us to try to re-authenticate if we are operating
729 * as a station.
730 */
731 ieee80211_new_state(vap, IEEE80211_S_AUTH,
732 IEEE80211_FC0_SUBTYPE_DEAUTH);
733 }
734 } else
735 ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
736 return 1;
737}
738
739int
740ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan,
741 const struct ieee80211_scan_entry *se)
742{
743 struct ieee80211com *ic = vap->iv_ic;
744 struct ieee80211_node *ni;
745
746 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr);
747 if (ni == NULL) {
748 /* XXX msg */
749 return 0;
750 }
751 /*
752 * Expand scan state into node's format.
753 * XXX may not need all this stuff
754 */
755 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid);
756 ni->ni_esslen = se->se_ssid[1];
757 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen);
758 ni->ni_tstamp.tsf = se->se_tstamp.tsf;
759 ni->ni_intval = se->se_intval;
760 ni->ni_capinfo = se->se_capinfo;
761 ni->ni_chan = chan;
762 ni->ni_timoff = se->se_timoff;
763 ni->ni_fhdwell = se->se_fhdwell;
764 ni->ni_fhindex = se->se_fhindex;
765 ni->ni_erp = se->se_erp;
766 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi);
767 ni->ni_noise = se->se_noise;
768 if (vap->iv_opmode == IEEE80211_M_STA) {
769 /* NB: only infrastructure mode requires an associd */
770 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
771 }
772
773 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) {
774 ieee80211_ies_expand(&ni->ni_ies);
775#ifdef IEEE80211_SUPPORT_SUPERG
776 if (ni->ni_ies.ath_ie != NULL)
777 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
778#endif
779 if (ni->ni_ies.htcap_ie != NULL)
780 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
781 if (ni->ni_ies.htinfo_ie != NULL)
782 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
783#ifdef IEEE80211_SUPPORT_TDMA
784 if (ni->ni_ies.tdma_ie != NULL)
785 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie);
786#endif
787 }
788
789 vap->iv_dtim_period = se->se_dtimperiod;
790 vap->iv_dtim_count = 0;
791
792 /* NB: must be after ni_chan is setup */
793 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates,
794 IEEE80211_F_DOSORT);
795 if (ieee80211_iserp_rateset(&ni->ni_rates))
796 ni->ni_flags |= IEEE80211_NODE_ERP;
797 node_setuptxparms(ni);
798
799 return ieee80211_sta_join1(ieee80211_ref_node(ni));
800}
801
802/*
803 * Leave the specified IBSS/BSS network. The node is assumed to
804 * be passed in with a held reference.
805 */
806void
807ieee80211_sta_leave(struct ieee80211_node *ni)
808{
809 struct ieee80211com *ic = ni->ni_ic;
810
811 ic->ic_node_cleanup(ni);
812 ieee80211_notify_node_leave(ni);
813}
814
815/*
816 * Send a deauthenticate frame and drop the station.
817 */
818void
819ieee80211_node_deauth(struct ieee80211_node *ni, int reason)
820{
821 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */
822 ieee80211_ref_node(ni);
823 if (ni->ni_associd != 0)
824 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason);
825 ieee80211_node_leave(ni);
826 ieee80211_free_node(ni);
827}
828
829static struct ieee80211_node *
830node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
831{
832 struct ieee80211_node *ni;
833
834 ni = (struct ieee80211_node *) malloc(sizeof(struct ieee80211_node),
835 M_80211_NODE, M_NOWAIT | M_ZERO);
836 return ni;
837}
838
839/*
840 * Initialize an ie blob with the specified data. If previous
841 * data exists re-use the data block. As a side effect we clear
842 * all references to specific ie's; the caller is required to
843 * recalculate them.
844 */
845int
846ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len)
847{
848 /* NB: assumes data+len are the last fields */
849 memset(ies, 0, offsetof(struct ieee80211_ies, data));
850 if (ies->data != NULL && ies->len != len) {
851 /* data size changed */
852 free(ies->data, M_80211_NODE_IE);
853 ies->data = NULL;
854 }
855 if (ies->data == NULL) {
856 ies->data = (uint8_t *) malloc(len, M_80211_NODE_IE, M_NOWAIT);
857 if (ies->data == NULL) {
858 ies->len = 0;
859 /* NB: pointers have already been zero'd above */
860 return 0;
861 }
862 }
863 memcpy(ies->data, data, len);
864 ies->len = len;
865 return 1;
866}
867
868/*
869 * Reclaim storage for an ie blob.
870 */
871void
872ieee80211_ies_cleanup(struct ieee80211_ies *ies)
873{
874 if (ies->data != NULL)
875 free(ies->data, M_80211_NODE_IE);
876}
877
878/*
879 * Expand an ie blob data contents and to fillin individual
880 * ie pointers. The data blob is assumed to be well-formed;
881 * we don't do any validity checking of ie lengths.
882 */
883void
884ieee80211_ies_expand(struct ieee80211_ies *ies)
885{
886 uint8_t *ie;
887 int ielen;
888
889 ie = ies->data;
890 ielen = ies->len;
891 while (ielen > 0) {
892 switch (ie[0]) {
893 case IEEE80211_ELEMID_VENDOR:
894 if (iswpaoui(ie))
895 ies->wpa_ie = ie;
896 else if (iswmeoui(ie))
897 ies->wme_ie = ie;
898#ifdef IEEE80211_SUPPORT_SUPERG
899 else if (isatherosoui(ie))
900 ies->ath_ie = ie;
901#endif
902#ifdef IEEE80211_SUPPORT_TDMA
903 else if (istdmaoui(ie))
904 ies->tdma_ie = ie;
905#endif
906 break;
907 case IEEE80211_ELEMID_RSN:
908 ies->rsn_ie = ie;
909 break;
910 case IEEE80211_ELEMID_HTCAP:
911 ies->htcap_ie = ie;
912 break;
913 }
914 ielen -= 2 + ie[1];
915 ie += 2 + ie[1];
916 }
917}
918
919/*
920 * Reclaim any resources in a node and reset any critical
921 * state. Typically nodes are free'd immediately after,
922 * but in some cases the storage may be reused so we need
923 * to insure consistent state (should probably fix that).
924 */
925static void
926node_cleanup(struct ieee80211_node *ni)
927{
928#define N(a) (sizeof(a)/sizeof(a[0]))
929 struct ieee80211vap *vap = ni->ni_vap;
930 int i;
931
932 /* NB: preserve ni_table */
933 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
934 if (vap->iv_opmode != IEEE80211_M_STA)
935 vap->iv_ps_sta--;
936 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
937 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
938 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta);
939 }
940 /*
941 * Cleanup any HT-related state.
942 */
943 if (ni->ni_flags & IEEE80211_NODE_HT)
944 ieee80211_ht_node_cleanup(ni);
945#ifdef IEEE80211_SUPPORT_SUPERG
946 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH)
947 ieee80211_ff_node_cleanup(ni);
948#endif
949 /*
950 * Clear AREF flag that marks the authorization refcnt bump
951 * has happened. This is probably not needed as the node
952 * should always be removed from the table so not found but
953 * do it just in case.
954 * Likewise clear the ASSOCID flag as these flags are intended
955 * to be managed in tandem.
956 */
957 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID);
958
959 /*
960 * Drain power save queue and, if needed, clear TIM.
961 */
962 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL)
963 vap->iv_set_tim(ni, 0);
964
965 ni->ni_associd = 0;
966 if (ni->ni_challenge != NULL) {
967 free(ni->ni_challenge, M_80211_NODE);
968 ni->ni_challenge = NULL;
969 }
970 /*
971 * Preserve SSID, WPA, and WME ie's so the bss node is
972 * reusable during a re-auth/re-assoc state transition.
973 * If we remove these data they will not be recreated
974 * because they come from a probe-response or beacon frame
975 * which cannot be expected prior to the association-response.
976 * This should not be an issue when operating in other modes
977 * as stations leaving always go through a full state transition
978 * which will rebuild this state.
979 *
980 * XXX does this leave us open to inheriting old state?
981 */
982 for (i = 0; i < N(ni->ni_rxfrag); i++)
983 if (ni->ni_rxfrag[i] != NULL) {
984 m_freem(ni->ni_rxfrag[i]);
985 ni->ni_rxfrag[i] = NULL;
986 }
987 /*
988 * Must be careful here to remove any key map entry w/o a LOR.
989 */
990 ieee80211_node_delucastkey(ni);
991#undef N
992}
993
994static void
995node_free(struct ieee80211_node *ni)
996{
997 struct ieee80211com *ic = ni->ni_ic;
998
999 ic->ic_node_cleanup(ni);
1000 ieee80211_ies_cleanup(&ni->ni_ies);
1001 ieee80211_psq_cleanup(&ni->ni_psq);
1002 IEEE80211_NODE_WDSQ_DESTROY(ni);
1003 free(ni, M_80211_NODE);
1004}
1005
1006static void
1007node_age(struct ieee80211_node *ni)
1008{
1009 struct ieee80211vap *vap = ni->ni_vap;
1010
1011 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta);
1012
1013 /*
1014 * Age frames on the power save queue.
1015 */
1016 if (ieee80211_node_psq_age(ni) != 0 &&
1017 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL)
1018 vap->iv_set_tim(ni, 0);
1019 /*
1020 * Age frames on the wds pending queue.
1021 */
1022 if (IEEE80211_NODE_WDSQ_QLEN(ni) != 0)
1023 ieee80211_node_wdsq_age(ni);
1024 /*
1025 * Age out HT resources (e.g. frames on the
1026 * A-MPDU reorder queues).
1027 */
1028 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT))
1029 ieee80211_ht_node_age(ni);
1030}
1031
1032static int8_t
1033node_getrssi(const struct ieee80211_node *ni)
1034{
1035 uint32_t avgrssi = ni->ni_avgrssi;
1036 int32_t rssi;
1037
1038 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER)
1039 return 0;
1040 rssi = IEEE80211_RSSI_GET(avgrssi);
1041 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1042}
1043
1044static void
1045node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise)
1046{
1047 *rssi = node_getrssi(ni);
1048 *noise = ni->ni_noise;
1049}
1050
1051static void
1052node_getmimoinfo(const struct ieee80211_node *ni,
1053 struct ieee80211_mimo_info *info)
1054{
1055 /* XXX zero data? */
1056}
1057
1058struct ieee80211_node *
1059ieee80211_alloc_node(struct ieee80211_node_table *nt,
1060 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
1061{
1062 struct ieee80211com *ic = nt->nt_ic;
1063 struct ieee80211_node *ni;
1064 int hash;
1065
1066 ni = ic->ic_node_alloc(vap, macaddr);
1067 if (ni == NULL) {
1068 vap->iv_stats.is_rx_nodealloc++;
1069 return NULL;
1070 }
1071
1072 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1073 "%s %p<%s> in %s table\n", __func__, ni,
1074 ether_sprintf(macaddr), nt->nt_name);
1075
1076 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1077 hash = IEEE80211_NODE_HASH(macaddr);
1078 ieee80211_node_initref(ni); /* mark referenced */
1079 ni->ni_chan = IEEE80211_CHAN_ANYC;
1080 ni->ni_authmode = IEEE80211_AUTH_OPEN;
1081 ni->ni_txpower = ic->ic_txpowlimit; /* max power */
1082 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
1083 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
1084 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER;
1085 ni->ni_inact_reload = nt->nt_inact_init;
1086 ni->ni_inact = ni->ni_inact_reload;
1087 ni->ni_ath_defkeyix = 0x7fff;
1088 ieee80211_psq_init(&ni->ni_psq, "unknown");
1089 IEEE80211_NODE_WDSQ_INIT(ni, "unknown");
1090
1091 IEEE80211_NODE_LOCK(nt);
1092 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
1093 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
1094 ni->ni_table = nt;
1095 ni->ni_vap = vap;
1096 ni->ni_ic = ic;
1097 IEEE80211_NODE_UNLOCK(nt);
1098
1099 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1100 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
1101
1102 return ni;
1103}
1104
1105/*
1106 * Craft a temporary node suitable for sending a management frame
1107 * to the specified station. We craft only as much state as we
1108 * need to do the work since the node will be immediately reclaimed
1109 * once the send completes.
1110 */
1111struct ieee80211_node *
1112ieee80211_tmp_node(struct ieee80211vap *vap,
1113 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1114{
1115 struct ieee80211com *ic = vap->iv_ic;
1116 struct ieee80211_node *ni;
1117
1118 ni = ic->ic_node_alloc(vap, macaddr);
1119 if (ni != NULL) {
1120 struct ieee80211_node *bss = vap->iv_bss;
1121
1122 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1123 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr));
1124
1125 ni->ni_table = NULL; /* NB: pedantic */
1126 ni->ni_ic = ic; /* NB: needed to set channel */
1127 ni->ni_vap = vap;
1128
1129 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1130 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1131 ieee80211_node_initref(ni); /* mark referenced */
1132 /* NB: required by ieee80211_fix_rate */
1133 ieee80211_node_set_chan(ni, bss->ni_chan);
1134 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
1135 IEEE80211_KEYIX_NONE);
1136 ni->ni_txpower = bss->ni_txpower;
1137 /* XXX optimize away */
1138 ieee80211_psq_init(&ni->ni_psq, "unknown");
1139 IEEE80211_NODE_WDSQ_INIT(ni, "unknown");
1140 } else {
1141 /* XXX msg */
1142 vap->iv_stats.is_rx_nodealloc++;
1143 }
1144 return ni;
1145}
1146
1147struct ieee80211_node *
1148ieee80211_dup_bss(struct ieee80211vap *vap,
1149 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1150{
1151 struct ieee80211com *ic = vap->iv_ic;
1152 struct ieee80211_node *ni;
1153
1154 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr);
1155 if (ni != NULL) {
1156 struct ieee80211_node *bss = vap->iv_bss;
1157 /*
1158 * Inherit from iv_bss.
1159 */
1160 copy_bss(ni, bss);
1161 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1162 ieee80211_node_set_chan(ni, bss->ni_chan);
1163 }
1164 return ni;
1165}
1166
1167/*
1168 * Create a bss node for a legacy WDS vap. The far end does
1169 * not associate so we just create create a new node and
1170 * simulate an association. The caller is responsible for
1171 * installing the node as the bss node and handling any further
1172 * setup work like authorizing the port.
1173 */
1174struct ieee80211_node *
1175ieee80211_node_create_wds(struct ieee80211vap *vap,
1176 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan)
1177{
1178 struct ieee80211com *ic = vap->iv_ic;
1179 struct ieee80211_node *ni;
1180
1181 /* XXX check if node already in sta table? */
1182 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid);
1183 if (ni != NULL) {
1184 ni->ni_wdsvap = vap;
1185 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid);
1186 /*
1187 * Inherit any manually configured settings.
1188 */
1189 copy_bss(ni, vap->iv_bss);
1190 ieee80211_node_set_chan(ni, chan);
1191 /* NB: propagate ssid so available to WPA supplicant */
1192 ni->ni_esslen = vap->iv_des_ssid[0].len;
1193 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
1194 /* NB: no associd for peer */
1195 /*
1196 * There are no management frames to use to
1197 * discover neighbor capabilities, so blindly
1198 * propagate the local configuration.
1199 */
1200 if (vap->iv_flags & IEEE80211_F_WME)
1201 ni->ni_flags |= IEEE80211_NODE_QOS;
1202#ifdef IEEE80211_SUPPORT_SUPERG
1203 if (vap->iv_flags & IEEE80211_F_FF)
1204 ni->ni_flags |= IEEE80211_NODE_FF;
1205#endif
1206 if ((ic->ic_htcaps & IEEE80211_HTC_HT) &&
| 654 if (flags > ieee80211_htchanflags(c))
655 c = ieee80211_ht_adjust_channel(ic, c, flags);
656 }
657 ic->ic_bsschan = ic->ic_curchan = c;
658 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
659 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
660}
661
662/*
663 * Change the current channel. The channel change is guaranteed to have
664 * happened before the next state change.
665 */
666void
667ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c)
668{
669 ieee80211_setupcurchan(ic, c);
670 ieee80211_runtask(ic, &ic->ic_chan_task);
671}
672
673/*
674 * Join the specified IBSS/BSS network. The node is assumed to
675 * be passed in with a held reference.
676 */
677static int
678ieee80211_sta_join1(struct ieee80211_node *selbs)
679{
680 struct ieee80211vap *vap = selbs->ni_vap;
681 struct ieee80211com *ic = selbs->ni_ic;
682 struct ieee80211_node *obss;
683 int canreassoc;
684
685 /*
686 * Committed to selbs, setup state.
687 */
688 obss = vap->iv_bss;
689 /*
690 * Check if old+new node have the same address in which
691 * case we can reassociate when operating in sta mode.
692 */
693 canreassoc = (obss != NULL &&
694 vap->iv_state == IEEE80211_S_RUN &&
695 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr));
696 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */
697 if (obss != NULL) {
698 copy_bss(selbs, obss);
699 ieee80211_node_decref(obss); /* iv_bss reference */
700 ieee80211_free_node(obss); /* station table reference */
701 obss = NULL; /* NB: guard against later use */
702 }
703
704 /*
705 * Delete unusable rates; we've already checked
706 * that the negotiated rate set is acceptable.
707 */
708 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates,
709 IEEE80211_F_DODEL | IEEE80211_F_JOIN);
710
711 ieee80211_setcurchan(ic, selbs->ni_chan);
712 /*
713 * Set the erp state (mostly the slot time) to deal with
714 * the auto-select case; this should be redundant if the
715 * mode is locked.
716 */
717 ieee80211_reset_erp(ic);
718 ieee80211_wme_initparams(vap);
719
720 if (vap->iv_opmode == IEEE80211_M_STA) {
721 if (canreassoc) {
722 /* Reassociate */
723 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
724 } else {
725 /*
726 * Act as if we received a DEAUTH frame in case we
727 * are invoked from the RUN state. This will cause
728 * us to try to re-authenticate if we are operating
729 * as a station.
730 */
731 ieee80211_new_state(vap, IEEE80211_S_AUTH,
732 IEEE80211_FC0_SUBTYPE_DEAUTH);
733 }
734 } else
735 ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
736 return 1;
737}
738
739int
740ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan,
741 const struct ieee80211_scan_entry *se)
742{
743 struct ieee80211com *ic = vap->iv_ic;
744 struct ieee80211_node *ni;
745
746 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr);
747 if (ni == NULL) {
748 /* XXX msg */
749 return 0;
750 }
751 /*
752 * Expand scan state into node's format.
753 * XXX may not need all this stuff
754 */
755 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid);
756 ni->ni_esslen = se->se_ssid[1];
757 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen);
758 ni->ni_tstamp.tsf = se->se_tstamp.tsf;
759 ni->ni_intval = se->se_intval;
760 ni->ni_capinfo = se->se_capinfo;
761 ni->ni_chan = chan;
762 ni->ni_timoff = se->se_timoff;
763 ni->ni_fhdwell = se->se_fhdwell;
764 ni->ni_fhindex = se->se_fhindex;
765 ni->ni_erp = se->se_erp;
766 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi);
767 ni->ni_noise = se->se_noise;
768 if (vap->iv_opmode == IEEE80211_M_STA) {
769 /* NB: only infrastructure mode requires an associd */
770 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
771 }
772
773 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) {
774 ieee80211_ies_expand(&ni->ni_ies);
775#ifdef IEEE80211_SUPPORT_SUPERG
776 if (ni->ni_ies.ath_ie != NULL)
777 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
778#endif
779 if (ni->ni_ies.htcap_ie != NULL)
780 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie);
781 if (ni->ni_ies.htinfo_ie != NULL)
782 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie);
783#ifdef IEEE80211_SUPPORT_TDMA
784 if (ni->ni_ies.tdma_ie != NULL)
785 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie);
786#endif
787 }
788
789 vap->iv_dtim_period = se->se_dtimperiod;
790 vap->iv_dtim_count = 0;
791
792 /* NB: must be after ni_chan is setup */
793 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates,
794 IEEE80211_F_DOSORT);
795 if (ieee80211_iserp_rateset(&ni->ni_rates))
796 ni->ni_flags |= IEEE80211_NODE_ERP;
797 node_setuptxparms(ni);
798
799 return ieee80211_sta_join1(ieee80211_ref_node(ni));
800}
801
802/*
803 * Leave the specified IBSS/BSS network. The node is assumed to
804 * be passed in with a held reference.
805 */
806void
807ieee80211_sta_leave(struct ieee80211_node *ni)
808{
809 struct ieee80211com *ic = ni->ni_ic;
810
811 ic->ic_node_cleanup(ni);
812 ieee80211_notify_node_leave(ni);
813}
814
815/*
816 * Send a deauthenticate frame and drop the station.
817 */
818void
819ieee80211_node_deauth(struct ieee80211_node *ni, int reason)
820{
821 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */
822 ieee80211_ref_node(ni);
823 if (ni->ni_associd != 0)
824 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason);
825 ieee80211_node_leave(ni);
826 ieee80211_free_node(ni);
827}
828
829static struct ieee80211_node *
830node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
831{
832 struct ieee80211_node *ni;
833
834 ni = (struct ieee80211_node *) malloc(sizeof(struct ieee80211_node),
835 M_80211_NODE, M_NOWAIT | M_ZERO);
836 return ni;
837}
838
839/*
840 * Initialize an ie blob with the specified data. If previous
841 * data exists re-use the data block. As a side effect we clear
842 * all references to specific ie's; the caller is required to
843 * recalculate them.
844 */
845int
846ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len)
847{
848 /* NB: assumes data+len are the last fields */
849 memset(ies, 0, offsetof(struct ieee80211_ies, data));
850 if (ies->data != NULL && ies->len != len) {
851 /* data size changed */
852 free(ies->data, M_80211_NODE_IE);
853 ies->data = NULL;
854 }
855 if (ies->data == NULL) {
856 ies->data = (uint8_t *) malloc(len, M_80211_NODE_IE, M_NOWAIT);
857 if (ies->data == NULL) {
858 ies->len = 0;
859 /* NB: pointers have already been zero'd above */
860 return 0;
861 }
862 }
863 memcpy(ies->data, data, len);
864 ies->len = len;
865 return 1;
866}
867
868/*
869 * Reclaim storage for an ie blob.
870 */
871void
872ieee80211_ies_cleanup(struct ieee80211_ies *ies)
873{
874 if (ies->data != NULL)
875 free(ies->data, M_80211_NODE_IE);
876}
877
878/*
879 * Expand an ie blob data contents and to fillin individual
880 * ie pointers. The data blob is assumed to be well-formed;
881 * we don't do any validity checking of ie lengths.
882 */
883void
884ieee80211_ies_expand(struct ieee80211_ies *ies)
885{
886 uint8_t *ie;
887 int ielen;
888
889 ie = ies->data;
890 ielen = ies->len;
891 while (ielen > 0) {
892 switch (ie[0]) {
893 case IEEE80211_ELEMID_VENDOR:
894 if (iswpaoui(ie))
895 ies->wpa_ie = ie;
896 else if (iswmeoui(ie))
897 ies->wme_ie = ie;
898#ifdef IEEE80211_SUPPORT_SUPERG
899 else if (isatherosoui(ie))
900 ies->ath_ie = ie;
901#endif
902#ifdef IEEE80211_SUPPORT_TDMA
903 else if (istdmaoui(ie))
904 ies->tdma_ie = ie;
905#endif
906 break;
907 case IEEE80211_ELEMID_RSN:
908 ies->rsn_ie = ie;
909 break;
910 case IEEE80211_ELEMID_HTCAP:
911 ies->htcap_ie = ie;
912 break;
913 }
914 ielen -= 2 + ie[1];
915 ie += 2 + ie[1];
916 }
917}
918
919/*
920 * Reclaim any resources in a node and reset any critical
921 * state. Typically nodes are free'd immediately after,
922 * but in some cases the storage may be reused so we need
923 * to insure consistent state (should probably fix that).
924 */
925static void
926node_cleanup(struct ieee80211_node *ni)
927{
928#define N(a) (sizeof(a)/sizeof(a[0]))
929 struct ieee80211vap *vap = ni->ni_vap;
930 int i;
931
932 /* NB: preserve ni_table */
933 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
934 if (vap->iv_opmode != IEEE80211_M_STA)
935 vap->iv_ps_sta--;
936 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
937 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
938 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta);
939 }
940 /*
941 * Cleanup any HT-related state.
942 */
943 if (ni->ni_flags & IEEE80211_NODE_HT)
944 ieee80211_ht_node_cleanup(ni);
945#ifdef IEEE80211_SUPPORT_SUPERG
946 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH)
947 ieee80211_ff_node_cleanup(ni);
948#endif
949 /*
950 * Clear AREF flag that marks the authorization refcnt bump
951 * has happened. This is probably not needed as the node
952 * should always be removed from the table so not found but
953 * do it just in case.
954 * Likewise clear the ASSOCID flag as these flags are intended
955 * to be managed in tandem.
956 */
957 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID);
958
959 /*
960 * Drain power save queue and, if needed, clear TIM.
961 */
962 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL)
963 vap->iv_set_tim(ni, 0);
964
965 ni->ni_associd = 0;
966 if (ni->ni_challenge != NULL) {
967 free(ni->ni_challenge, M_80211_NODE);
968 ni->ni_challenge = NULL;
969 }
970 /*
971 * Preserve SSID, WPA, and WME ie's so the bss node is
972 * reusable during a re-auth/re-assoc state transition.
973 * If we remove these data they will not be recreated
974 * because they come from a probe-response or beacon frame
975 * which cannot be expected prior to the association-response.
976 * This should not be an issue when operating in other modes
977 * as stations leaving always go through a full state transition
978 * which will rebuild this state.
979 *
980 * XXX does this leave us open to inheriting old state?
981 */
982 for (i = 0; i < N(ni->ni_rxfrag); i++)
983 if (ni->ni_rxfrag[i] != NULL) {
984 m_freem(ni->ni_rxfrag[i]);
985 ni->ni_rxfrag[i] = NULL;
986 }
987 /*
988 * Must be careful here to remove any key map entry w/o a LOR.
989 */
990 ieee80211_node_delucastkey(ni);
991#undef N
992}
993
994static void
995node_free(struct ieee80211_node *ni)
996{
997 struct ieee80211com *ic = ni->ni_ic;
998
999 ic->ic_node_cleanup(ni);
1000 ieee80211_ies_cleanup(&ni->ni_ies);
1001 ieee80211_psq_cleanup(&ni->ni_psq);
1002 IEEE80211_NODE_WDSQ_DESTROY(ni);
1003 free(ni, M_80211_NODE);
1004}
1005
1006static void
1007node_age(struct ieee80211_node *ni)
1008{
1009 struct ieee80211vap *vap = ni->ni_vap;
1010
1011 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta);
1012
1013 /*
1014 * Age frames on the power save queue.
1015 */
1016 if (ieee80211_node_psq_age(ni) != 0 &&
1017 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL)
1018 vap->iv_set_tim(ni, 0);
1019 /*
1020 * Age frames on the wds pending queue.
1021 */
1022 if (IEEE80211_NODE_WDSQ_QLEN(ni) != 0)
1023 ieee80211_node_wdsq_age(ni);
1024 /*
1025 * Age out HT resources (e.g. frames on the
1026 * A-MPDU reorder queues).
1027 */
1028 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT))
1029 ieee80211_ht_node_age(ni);
1030}
1031
1032static int8_t
1033node_getrssi(const struct ieee80211_node *ni)
1034{
1035 uint32_t avgrssi = ni->ni_avgrssi;
1036 int32_t rssi;
1037
1038 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER)
1039 return 0;
1040 rssi = IEEE80211_RSSI_GET(avgrssi);
1041 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi;
1042}
1043
1044static void
1045node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise)
1046{
1047 *rssi = node_getrssi(ni);
1048 *noise = ni->ni_noise;
1049}
1050
1051static void
1052node_getmimoinfo(const struct ieee80211_node *ni,
1053 struct ieee80211_mimo_info *info)
1054{
1055 /* XXX zero data? */
1056}
1057
1058struct ieee80211_node *
1059ieee80211_alloc_node(struct ieee80211_node_table *nt,
1060 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
1061{
1062 struct ieee80211com *ic = nt->nt_ic;
1063 struct ieee80211_node *ni;
1064 int hash;
1065
1066 ni = ic->ic_node_alloc(vap, macaddr);
1067 if (ni == NULL) {
1068 vap->iv_stats.is_rx_nodealloc++;
1069 return NULL;
1070 }
1071
1072 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1073 "%s %p<%s> in %s table\n", __func__, ni,
1074 ether_sprintf(macaddr), nt->nt_name);
1075
1076 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1077 hash = IEEE80211_NODE_HASH(macaddr);
1078 ieee80211_node_initref(ni); /* mark referenced */
1079 ni->ni_chan = IEEE80211_CHAN_ANYC;
1080 ni->ni_authmode = IEEE80211_AUTH_OPEN;
1081 ni->ni_txpower = ic->ic_txpowlimit; /* max power */
1082 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
1083 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
1084 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER;
1085 ni->ni_inact_reload = nt->nt_inact_init;
1086 ni->ni_inact = ni->ni_inact_reload;
1087 ni->ni_ath_defkeyix = 0x7fff;
1088 ieee80211_psq_init(&ni->ni_psq, "unknown");
1089 IEEE80211_NODE_WDSQ_INIT(ni, "unknown");
1090
1091 IEEE80211_NODE_LOCK(nt);
1092 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
1093 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
1094 ni->ni_table = nt;
1095 ni->ni_vap = vap;
1096 ni->ni_ic = ic;
1097 IEEE80211_NODE_UNLOCK(nt);
1098
1099 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1100 "%s: inact_reload %u", __func__, ni->ni_inact_reload);
1101
1102 return ni;
1103}
1104
1105/*
1106 * Craft a temporary node suitable for sending a management frame
1107 * to the specified station. We craft only as much state as we
1108 * need to do the work since the node will be immediately reclaimed
1109 * once the send completes.
1110 */
1111struct ieee80211_node *
1112ieee80211_tmp_node(struct ieee80211vap *vap,
1113 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1114{
1115 struct ieee80211com *ic = vap->iv_ic;
1116 struct ieee80211_node *ni;
1117
1118 ni = ic->ic_node_alloc(vap, macaddr);
1119 if (ni != NULL) {
1120 struct ieee80211_node *bss = vap->iv_bss;
1121
1122 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1123 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr));
1124
1125 ni->ni_table = NULL; /* NB: pedantic */
1126 ni->ni_ic = ic; /* NB: needed to set channel */
1127 ni->ni_vap = vap;
1128
1129 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
1130 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1131 ieee80211_node_initref(ni); /* mark referenced */
1132 /* NB: required by ieee80211_fix_rate */
1133 ieee80211_node_set_chan(ni, bss->ni_chan);
1134 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
1135 IEEE80211_KEYIX_NONE);
1136 ni->ni_txpower = bss->ni_txpower;
1137 /* XXX optimize away */
1138 ieee80211_psq_init(&ni->ni_psq, "unknown");
1139 IEEE80211_NODE_WDSQ_INIT(ni, "unknown");
1140 } else {
1141 /* XXX msg */
1142 vap->iv_stats.is_rx_nodealloc++;
1143 }
1144 return ni;
1145}
1146
1147struct ieee80211_node *
1148ieee80211_dup_bss(struct ieee80211vap *vap,
1149 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1150{
1151 struct ieee80211com *ic = vap->iv_ic;
1152 struct ieee80211_node *ni;
1153
1154 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr);
1155 if (ni != NULL) {
1156 struct ieee80211_node *bss = vap->iv_bss;
1157 /*
1158 * Inherit from iv_bss.
1159 */
1160 copy_bss(ni, bss);
1161 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
1162 ieee80211_node_set_chan(ni, bss->ni_chan);
1163 }
1164 return ni;
1165}
1166
1167/*
1168 * Create a bss node for a legacy WDS vap. The far end does
1169 * not associate so we just create create a new node and
1170 * simulate an association. The caller is responsible for
1171 * installing the node as the bss node and handling any further
1172 * setup work like authorizing the port.
1173 */
1174struct ieee80211_node *
1175ieee80211_node_create_wds(struct ieee80211vap *vap,
1176 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan)
1177{
1178 struct ieee80211com *ic = vap->iv_ic;
1179 struct ieee80211_node *ni;
1180
1181 /* XXX check if node already in sta table? */
1182 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid);
1183 if (ni != NULL) {
1184 ni->ni_wdsvap = vap;
1185 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid);
1186 /*
1187 * Inherit any manually configured settings.
1188 */
1189 copy_bss(ni, vap->iv_bss);
1190 ieee80211_node_set_chan(ni, chan);
1191 /* NB: propagate ssid so available to WPA supplicant */
1192 ni->ni_esslen = vap->iv_des_ssid[0].len;
1193 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen);
1194 /* NB: no associd for peer */
1195 /*
1196 * There are no management frames to use to
1197 * discover neighbor capabilities, so blindly
1198 * propagate the local configuration.
1199 */
1200 if (vap->iv_flags & IEEE80211_F_WME)
1201 ni->ni_flags |= IEEE80211_NODE_QOS;
1202#ifdef IEEE80211_SUPPORT_SUPERG
1203 if (vap->iv_flags & IEEE80211_F_FF)
1204 ni->ni_flags |= IEEE80211_NODE_FF;
1205#endif
1206 if ((ic->ic_htcaps & IEEE80211_HTC_HT) &&
|
1208 /*
1209 * Device is HT-capable and HT is enabled for
1210 * the vap; setup HT operation. On return
1211 * ni_chan will be adjusted to an HT channel.
1212 */
1213 ieee80211_ht_wds_init(ni);
1214 } else {
1215 struct ieee80211_channel *c = ni->ni_chan;
1216 /*
1217 * Force a legacy channel to be used.
1218 */
1219 c = ieee80211_find_channel(ic,
1220 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT);
1221 KASSERT(c != NULL, ("no legacy channel, %u/%x",
1222 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags));
1223 ni->ni_chan = c;
1224 }
1225 }
1226 return ni;
1227}
1228
1229struct ieee80211_node *
1230#ifdef IEEE80211_DEBUG_REFCNT
1231ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt,
1232 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1233#else
1234ieee80211_find_node_locked(struct ieee80211_node_table *nt,
1235 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1236#endif
1237{
1238 struct ieee80211_node *ni;
1239 int hash;
1240
1241 IEEE80211_NODE_LOCK_ASSERT(nt);
1242
1243 hash = IEEE80211_NODE_HASH(macaddr);
1244 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1245 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1246 ieee80211_ref_node(ni); /* mark referenced */
1247#ifdef IEEE80211_DEBUG_REFCNT
1248 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1249 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1250 func, line,
1251 ni, ether_sprintf(ni->ni_macaddr),
1252 ieee80211_node_refcnt(ni));
1253#endif
1254 return ni;
1255 }
1256 }
1257 return NULL;
1258}
1259
1260struct ieee80211_node *
1261#ifdef IEEE80211_DEBUG_REFCNT
1262ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1263 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1264#else
1265ieee80211_find_node(struct ieee80211_node_table *nt,
1266 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1267#endif
1268{
1269 struct ieee80211_node *ni;
1270
1271 IEEE80211_NODE_LOCK(nt);
1272 ni = ieee80211_find_node_locked(nt, macaddr);
1273 IEEE80211_NODE_UNLOCK(nt);
1274 return ni;
1275}
1276
1277struct ieee80211_node *
1278#ifdef IEEE80211_DEBUG_REFCNT
1279ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt,
1280 const struct ieee80211vap *vap,
1281 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1282#else
1283ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt,
1284 const struct ieee80211vap *vap,
1285 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1286#endif
1287{
1288 struct ieee80211_node *ni;
1289 int hash;
1290
1291 IEEE80211_NODE_LOCK_ASSERT(nt);
1292
1293 hash = IEEE80211_NODE_HASH(macaddr);
1294 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1295 if (ni->ni_vap == vap &&
1296 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1297 ieee80211_ref_node(ni); /* mark referenced */
1298#ifdef IEEE80211_DEBUG_REFCNT
1299 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1300 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1301 func, line,
1302 ni, ether_sprintf(ni->ni_macaddr),
1303 ieee80211_node_refcnt(ni));
1304#endif
1305 return ni;
1306 }
1307 }
1308 return NULL;
1309}
1310
1311struct ieee80211_node *
1312#ifdef IEEE80211_DEBUG_REFCNT
1313ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt,
1314 const struct ieee80211vap *vap,
1315 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1316#else
1317ieee80211_find_vap_node(struct ieee80211_node_table *nt,
1318 const struct ieee80211vap *vap,
1319 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1320#endif
1321{
1322 struct ieee80211_node *ni;
1323
1324 IEEE80211_NODE_LOCK(nt);
1325 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr);
1326 IEEE80211_NODE_UNLOCK(nt);
1327 return ni;
1328}
1329
1330/*
1331 * Fake up a node; this handles node discovery in adhoc mode.
1332 * Note that for the driver's benefit we we treat this like
1333 * an association so the driver has an opportunity to setup
1334 * it's private state.
1335 */
1336struct ieee80211_node *
1337ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap,
1338 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1339{
1340 struct ieee80211_node *ni;
1341
1342 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1343 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr));
1344 ni = ieee80211_dup_bss(vap, macaddr);
1345 if (ni != NULL) {
1346 struct ieee80211com *ic = vap->iv_ic;
1347
1348 /* XXX no rate negotiation; just dup */
1349 ni->ni_rates = vap->iv_bss->ni_rates;
1350 if (ieee80211_iserp_rateset(&ni->ni_rates))
1351 ni->ni_flags |= IEEE80211_NODE_ERP;
1352 if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
1353 /*
1354 * In adhoc demo mode there are no management
1355 * frames to use to discover neighbor capabilities,
1356 * so blindly propagate the local configuration
1357 * so we can do interesting things (e.g. use
1358 * WME to disable ACK's).
1359 */
1360 if (vap->iv_flags & IEEE80211_F_WME)
1361 ni->ni_flags |= IEEE80211_NODE_QOS;
1362#ifdef IEEE80211_SUPPORT_SUPERG
1363 if (vap->iv_flags & IEEE80211_F_FF)
1364 ni->ni_flags |= IEEE80211_NODE_FF;
1365#endif
1366 }
1367 node_setuptxparms(ni);
1368 if (ic->ic_newassoc != NULL)
1369 ic->ic_newassoc(ni, 1);
1370 /* XXX not right for 802.1x/WPA */
1371 ieee80211_node_authorize(ni);
1372 }
1373 return ni;
1374}
1375
1376void
1377ieee80211_init_neighbor(struct ieee80211_node *ni,
1378 const struct ieee80211_frame *wh,
1379 const struct ieee80211_scanparams *sp)
1380{
1381 ni->ni_esslen = sp->ssid[1];
1382 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1383 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1384 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1385 ni->ni_intval = sp->bintval;
1386 ni->ni_capinfo = sp->capinfo;
1387 ni->ni_chan = ni->ni_ic->ic_curchan;
1388 ni->ni_fhdwell = sp->fhdwell;
1389 ni->ni_fhindex = sp->fhindex;
1390 ni->ni_erp = sp->erp;
1391 ni->ni_timoff = sp->timoff;
1392
1393 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) {
1394 ieee80211_ies_expand(&ni->ni_ies);
1395 if (ni->ni_ies.wme_ie != NULL)
1396 ni->ni_flags |= IEEE80211_NODE_QOS;
1397 else
1398 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1399#ifdef IEEE80211_SUPPORT_SUPERG
1400 if (ni->ni_ies.ath_ie != NULL)
1401 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
1402#endif
1403 }
1404
1405 /* NB: must be after ni_chan is setup */
1406 ieee80211_setup_rates(ni, sp->rates, sp->xrates,
1407 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1408 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1409}
1410
1411/*
1412 * Do node discovery in adhoc mode on receipt of a beacon
1413 * or probe response frame. Note that for the driver's
1414 * benefit we we treat this like an association so the
1415 * driver has an opportunity to setup it's private state.
1416 */
1417struct ieee80211_node *
1418ieee80211_add_neighbor(struct ieee80211vap *vap,
1419 const struct ieee80211_frame *wh,
1420 const struct ieee80211_scanparams *sp)
1421{
1422 struct ieee80211_node *ni;
1423
1424 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1425 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2));
1426 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */
1427 if (ni != NULL) {
1428 struct ieee80211com *ic = vap->iv_ic;
1429
1430 ieee80211_init_neighbor(ni, wh, sp);
1431 if (ieee80211_iserp_rateset(&ni->ni_rates))
1432 ni->ni_flags |= IEEE80211_NODE_ERP;
1433 node_setuptxparms(ni);
1434 if (ic->ic_newassoc != NULL)
1435 ic->ic_newassoc(ni, 1);
1436 /* XXX not right for 802.1x/WPA */
1437 ieee80211_node_authorize(ni);
1438 }
1439 return ni;
1440}
1441
1442#define IS_PROBEREQ(wh) \
1443 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \
1444 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
1445#define IS_BCAST_PROBEREQ(wh) \
1446 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \
1447 ((const struct ieee80211_frame *)(wh))->i_addr3))
1448
1449static __inline struct ieee80211_node *
1450_find_rxnode(struct ieee80211_node_table *nt,
1451 const struct ieee80211_frame_min *wh)
1452{
1453 if (IS_BCAST_PROBEREQ(wh))
1454 return NULL; /* spam bcast probe req to all vap's */
1455 return ieee80211_find_node_locked(nt, wh->i_addr2);
1456}
1457
1458/*
1459 * Locate the node for sender, track state, and then pass the
1460 * (referenced) node up to the 802.11 layer for its use. Note
1461 * we can return NULL if the sender is not in the table.
1462 */
1463struct ieee80211_node *
1464#ifdef IEEE80211_DEBUG_REFCNT
1465ieee80211_find_rxnode_debug(struct ieee80211com *ic,
1466 const struct ieee80211_frame_min *wh, const char *func, int line)
1467#else
1468ieee80211_find_rxnode(struct ieee80211com *ic,
1469 const struct ieee80211_frame_min *wh)
1470#endif
1471{
1472 struct ieee80211_node_table *nt;
1473 struct ieee80211_node *ni;
1474
1475 nt = &ic->ic_sta;
1476 IEEE80211_NODE_LOCK(nt);
1477 ni = _find_rxnode(nt, wh);
1478 IEEE80211_NODE_UNLOCK(nt);
1479
1480 return ni;
1481}
1482
1483/*
1484 * Like ieee80211_find_rxnode but use the supplied h/w
1485 * key index as a hint to locate the node in the key
1486 * mapping table. If an entry is present at the key
1487 * index we return it; otherwise do a normal lookup and
1488 * update the mapping table if the station has a unicast
1489 * key assigned to it.
1490 */
1491struct ieee80211_node *
1492#ifdef IEEE80211_DEBUG_REFCNT
1493ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic,
1494 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
1495 const char *func, int line)
1496#else
1497ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
1498 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix)
1499#endif
1500{
1501 struct ieee80211_node_table *nt;
1502 struct ieee80211_node *ni;
1503
1504 nt = &ic->ic_sta;
1505 IEEE80211_NODE_LOCK(nt);
1506 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
1507 ni = nt->nt_keyixmap[keyix];
1508 else
1509 ni = NULL;
1510 if (ni == NULL) {
1511 ni = _find_rxnode(nt, wh);
1512 if (ni != NULL && nt->nt_keyixmap != NULL) {
1513 /*
1514 * If the station has a unicast key cache slot
1515 * assigned update the key->node mapping table.
1516 */
1517 keyix = ni->ni_ucastkey.wk_rxkeyix;
1518 /* XXX can keyixmap[keyix] != NULL? */
1519 if (keyix < nt->nt_keyixmax &&
1520 nt->nt_keyixmap[keyix] == NULL) {
1521 IEEE80211_DPRINTF(ni->ni_vap,
1522 IEEE80211_MSG_NODE,
1523 "%s: add key map entry %p<%s> refcnt %d\n",
1524 __func__, ni, ether_sprintf(ni->ni_macaddr),
1525 ieee80211_node_refcnt(ni)+1);
1526 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
1527 }
1528 }
1529 } else {
1530 if (IS_BCAST_PROBEREQ(wh))
1531 ni = NULL; /* spam bcast probe req to all vap's */
1532 else
1533 ieee80211_ref_node(ni);
1534 }
1535 IEEE80211_NODE_UNLOCK(nt);
1536
1537 return ni;
1538}
1539#undef IS_BCAST_PROBEREQ
1540#undef IS_PROBEREQ
1541
1542/*
1543 * Return a reference to the appropriate node for sending
1544 * a data frame. This handles node discovery in adhoc networks.
1545 */
1546struct ieee80211_node *
1547#ifdef IEEE80211_DEBUG_REFCNT
1548ieee80211_find_txnode_debug(struct ieee80211vap *vap,
1549 const uint8_t macaddr[IEEE80211_ADDR_LEN],
1550 const char *func, int line)
1551#else
1552ieee80211_find_txnode(struct ieee80211vap *vap,
1553 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1554#endif
1555{
1556 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta;
1557 struct ieee80211_node *ni;
1558
1559 /*
1560 * The destination address should be in the node table
1561 * unless this is a multicast/broadcast frame. We can
1562 * also optimize station mode operation, all frames go
1563 * to the bss node.
1564 */
1565 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */
1566 IEEE80211_NODE_LOCK(nt);
1567 if (vap->iv_opmode == IEEE80211_M_STA ||
1568 vap->iv_opmode == IEEE80211_M_WDS ||
1569 IEEE80211_IS_MULTICAST(macaddr))
1570 ni = ieee80211_ref_node(vap->iv_bss);
1571 else
1572 ni = ieee80211_find_node_locked(nt, macaddr);
1573 IEEE80211_NODE_UNLOCK(nt);
1574
1575 if (ni == NULL) {
1576 if (vap->iv_opmode == IEEE80211_M_IBSS ||
1577 vap->iv_opmode == IEEE80211_M_AHDEMO) {
1578 /*
1579 * In adhoc mode cons up a node for the destination.
1580 * Note that we need an additional reference for the
1581 * caller to be consistent with
1582 * ieee80211_find_node_locked.
1583 */
1584 ni = ieee80211_fakeup_adhoc_node(vap, macaddr);
1585 if (ni != NULL)
1586 (void) ieee80211_ref_node(ni);
1587 } else {
1588 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr,
1589 "no node, discard frame (%s)", __func__);
1590 vap->iv_stats.is_tx_nonode++;
1591 }
1592 }
1593 return ni;
1594}
1595
1596static void
1597_ieee80211_free_node(struct ieee80211_node *ni)
1598{
1599 struct ieee80211_node_table *nt = ni->ni_table;
1600
1601 /*
1602 * NB: careful about referencing the vap as it may be
1603 * gone if the last reference was held by a driver.
1604 * We know the com will always be present so it's safe
1605 * to use ni_ic below to reclaim resources.
1606 */
1607#if 0
1608 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1609 "%s %p<%s> in %s table\n", __func__, ni,
1610 ether_sprintf(ni->ni_macaddr),
1611 nt != NULL ? nt->nt_name : "<gone>");
1612#endif
1613 if (ni->ni_associd != 0) {
1614 struct ieee80211vap *vap = ni->ni_vap;
1615 if (vap->iv_aid_bitmap != NULL)
1616 IEEE80211_AID_CLR(vap, ni->ni_associd);
1617 }
1618 if (nt != NULL) {
1619 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1620 LIST_REMOVE(ni, ni_hash);
1621 }
1622 ni->ni_ic->ic_node_free(ni);
1623}
1624
1625void
1626#ifdef IEEE80211_DEBUG_REFCNT
1627ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line)
1628#else
1629ieee80211_free_node(struct ieee80211_node *ni)
1630#endif
1631{
1632 struct ieee80211_node_table *nt = ni->ni_table;
1633
1634#ifdef IEEE80211_DEBUG_REFCNT
1635 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1636 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
1637 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1);
1638#endif
1639 if (nt != NULL) {
1640 IEEE80211_NODE_LOCK(nt);
1641 if (ieee80211_node_dectestref(ni)) {
1642 /*
1643 * Last reference, reclaim state.
1644 */
1645 _ieee80211_free_node(ni);
1646 } else if (ieee80211_node_refcnt(ni) == 1 &&
1647 nt->nt_keyixmap != NULL) {
1648 ieee80211_keyix keyix;
1649 /*
1650 * Check for a last reference in the key mapping table.
1651 */
1652 keyix = ni->ni_ucastkey.wk_rxkeyix;
1653 if (keyix < nt->nt_keyixmax &&
1654 nt->nt_keyixmap[keyix] == ni) {
1655 IEEE80211_DPRINTF(ni->ni_vap,
1656 IEEE80211_MSG_NODE,
1657 "%s: %p<%s> clear key map entry", __func__,
1658 ni, ether_sprintf(ni->ni_macaddr));
1659 nt->nt_keyixmap[keyix] = NULL;
1660 ieee80211_node_decref(ni); /* XXX needed? */
1661 _ieee80211_free_node(ni);
1662 }
1663 }
1664 IEEE80211_NODE_UNLOCK(nt);
1665 } else {
1666 if (ieee80211_node_dectestref(ni))
1667 _ieee80211_free_node(ni);
1668 }
1669}
1670
1671/*
1672 * Reclaim a unicast key and clear any key cache state.
1673 */
1674int
1675ieee80211_node_delucastkey(struct ieee80211_node *ni)
1676{
1677 struct ieee80211com *ic = ni->ni_ic;
1678 struct ieee80211_node_table *nt = &ic->ic_sta;
1679 struct ieee80211_node *nikey;
1680 ieee80211_keyix keyix;
1681 int isowned, status;
1682
1683 /*
1684 * NB: We must beware of LOR here; deleting the key
1685 * can cause the crypto layer to block traffic updates
1686 * which can generate a LOR against the node table lock;
1687 * grab it here and stash the key index for our use below.
1688 *
1689 * Must also beware of recursion on the node table lock.
1690 * When called from node_cleanup we may already have
1691 * the node table lock held. Unfortunately there's no
1692 * way to separate out this path so we must do this
1693 * conditionally.
1694 */
1695 isowned = IEEE80211_NODE_IS_LOCKED(nt);
1696 if (!isowned)
1697 IEEE80211_NODE_LOCK(nt);
1698 nikey = NULL;
1699 status = 1; /* NB: success */
1700 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) {
1701 keyix = ni->ni_ucastkey.wk_rxkeyix;
1702 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey);
1703 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
1704 nikey = nt->nt_keyixmap[keyix];
1705 nt->nt_keyixmap[keyix] = NULL;;
1706 }
1707 }
1708 if (!isowned)
1709 IEEE80211_NODE_UNLOCK(nt);
1710
1711 if (nikey != NULL) {
1712 KASSERT(nikey == ni,
1713 ("key map out of sync, ni %p nikey %p", ni, nikey));
1714 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1715 "%s: delete key map entry %p<%s> refcnt %d\n",
1716 __func__, ni, ether_sprintf(ni->ni_macaddr),
1717 ieee80211_node_refcnt(ni)-1);
1718 ieee80211_free_node(ni);
1719 }
1720 return status;
1721}
1722
1723/*
1724 * Reclaim a node. If this is the last reference count then
1725 * do the normal free work. Otherwise remove it from the node
1726 * table and mark it gone by clearing the back-reference.
1727 */
1728static void
1729node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1730{
1731 ieee80211_keyix keyix;
1732
1733 IEEE80211_NODE_LOCK_ASSERT(nt);
1734
1735 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1736 "%s: remove %p<%s> from %s table, refcnt %d\n",
1737 __func__, ni, ether_sprintf(ni->ni_macaddr),
1738 nt->nt_name, ieee80211_node_refcnt(ni)-1);
1739 /*
1740 * Clear any entry in the unicast key mapping table.
1741 * We need to do it here so rx lookups don't find it
1742 * in the mapping table even if it's not in the hash
1743 * table. We cannot depend on the mapping table entry
1744 * being cleared because the node may not be free'd.
1745 */
1746 keyix = ni->ni_ucastkey.wk_rxkeyix;
1747 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
1748 nt->nt_keyixmap[keyix] == ni) {
1749 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1750 "%s: %p<%s> clear key map entry %u\n",
1751 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix);
1752 nt->nt_keyixmap[keyix] = NULL;
1753 ieee80211_node_decref(ni); /* NB: don't need free */
1754 }
1755 if (!ieee80211_node_dectestref(ni)) {
1756 /*
1757 * Other references are present, just remove the
1758 * node from the table so it cannot be found. When
1759 * the references are dropped storage will be
1760 * reclaimed.
1761 */
1762 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1763 LIST_REMOVE(ni, ni_hash);
1764 ni->ni_table = NULL; /* clear reference */
1765 } else
1766 _ieee80211_free_node(ni);
1767}
1768
1769/*
1770 * Node table support.
1771 */
1772
1773static void
1774ieee80211_node_table_init(struct ieee80211com *ic,
1775 struct ieee80211_node_table *nt,
1776 const char *name, int inact, int keyixmax)
1777{
1778 struct ifnet *ifp = ic->ic_ifp;
1779
1780 nt->nt_ic = ic;
1781 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname);
1782 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname);
1783 TAILQ_INIT(&nt->nt_node);
1784 nt->nt_name = name;
1785 nt->nt_scangen = 1;
1786 nt->nt_inact_init = inact;
1787 nt->nt_keyixmax = keyixmax;
1788 if (nt->nt_keyixmax > 0) {
1789 nt->nt_keyixmap = (struct ieee80211_node **) malloc(
1790 keyixmax * sizeof(struct ieee80211_node *),
1791 M_80211_NODE, M_NOWAIT | M_ZERO);
1792 if (nt->nt_keyixmap == NULL)
1793 if_printf(ic->ic_ifp,
1794 "Cannot allocate key index map with %u entries\n",
1795 keyixmax);
1796 } else
1797 nt->nt_keyixmap = NULL;
1798}
1799
1800static void
1801ieee80211_node_table_reset(struct ieee80211_node_table *nt,
1802 struct ieee80211vap *match)
1803{
1804 struct ieee80211_node *ni, *next;
1805
1806 IEEE80211_NODE_LOCK(nt);
1807 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) {
1808 if (match != NULL && ni->ni_vap != match)
1809 continue;
1810 /* XXX can this happen? if so need's work */
1811 if (ni->ni_associd != 0) {
1812 struct ieee80211vap *vap = ni->ni_vap;
1813
1814 if (vap->iv_auth->ia_node_leave != NULL)
1815 vap->iv_auth->ia_node_leave(ni);
1816 if (vap->iv_aid_bitmap != NULL)
1817 IEEE80211_AID_CLR(vap, ni->ni_associd);
1818 }
1819 ni->ni_wdsvap = NULL; /* clear reference */
1820 node_reclaim(nt, ni);
1821 }
1822 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) {
1823 /*
1824 * Make a separate pass to clear references to this vap
1825 * held by DWDS entries. They will not be matched above
1826 * because ni_vap will point to the ap vap but we still
1827 * need to clear ni_wdsvap when the WDS vap is destroyed
1828 * and/or reset.
1829 */
1830 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next)
1831 if (ni->ni_wdsvap == match)
1832 ni->ni_wdsvap = NULL;
1833 }
1834 IEEE80211_NODE_UNLOCK(nt);
1835}
1836
1837static void
1838ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
1839{
1840 ieee80211_node_table_reset(nt, NULL);
1841 if (nt->nt_keyixmap != NULL) {
1842#ifdef DIAGNOSTIC
1843 /* XXX verify all entries are NULL */
1844 int i;
1845 for (i = 0; i < nt->nt_keyixmax; i++)
1846 if (nt->nt_keyixmap[i] != NULL)
1847 printf("%s: %s[%u] still active\n", __func__,
1848 nt->nt_name, i);
1849#endif
1850 free(nt->nt_keyixmap, M_80211_NODE);
1851 nt->nt_keyixmap = NULL;
1852 }
1853 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt);
1854 IEEE80211_NODE_LOCK_DESTROY(nt);
1855}
1856
1857/*
1858 * Timeout inactive stations and do related housekeeping.
1859 * Note that we cannot hold the node lock while sending a
1860 * frame as this would lead to a LOR. Instead we use a
1861 * generation number to mark nodes that we've scanned and
1862 * drop the lock and restart a scan if we have to time out
1863 * a node. Since we are single-threaded by virtue of
1864 * controlling the inactivity timer we can be sure this will
1865 * process each node only once.
1866 */
1867static void
1868ieee80211_timeout_stations(struct ieee80211com *ic)
1869{
1870 struct ieee80211_node_table *nt = &ic->ic_sta;
1871 struct ieee80211vap *vap;
1872 struct ieee80211_node *ni;
1873 int gen = 0;
1874
1875 IEEE80211_NODE_ITERATE_LOCK(nt);
1876 gen = ++nt->nt_scangen;
1877restart:
1878 IEEE80211_NODE_LOCK(nt);
1879 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
1880 if (ni->ni_scangen == gen) /* previously handled */
1881 continue;
1882 ni->ni_scangen = gen;
1883 /*
1884 * Ignore entries for which have yet to receive an
1885 * authentication frame. These are transient and
1886 * will be reclaimed when the last reference to them
1887 * goes away (when frame xmits complete).
1888 */
1889 vap = ni->ni_vap;
1890 /*
1891 * Only process stations when in RUN state. This
1892 * insures, for example, that we don't timeout an
1893 * inactive station during CAC. Note that CSA state
1894 * is actually handled in ieee80211_node_timeout as
1895 * it applies to more than timeout processing.
1896 */
1897 if (vap->iv_state != IEEE80211_S_RUN)
1898 continue;
1899 /* XXX can vap be NULL? */
1900 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
1901 vap->iv_opmode == IEEE80211_M_STA) &&
1902 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1903 continue;
1904 /*
1905 * Free fragment if not needed anymore
1906 * (last fragment older than 1s).
1907 * XXX doesn't belong here, move to node_age
1908 */
1909 if (ni->ni_rxfrag[0] != NULL &&
1910 ticks > ni->ni_rxfragstamp + hz) {
1911 m_freem(ni->ni_rxfrag[0]);
1912 ni->ni_rxfrag[0] = NULL;
1913 }
1914 if (ni->ni_inact > 0) {
1915 ni->ni_inact--;
1916 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1917 "%s: inact %u inact_reload %u nrates %u",
1918 __func__, ni->ni_inact, ni->ni_inact_reload,
1919 ni->ni_rates.rs_nrates);
1920 }
1921 /*
1922 * Special case ourself; we may be idle for extended periods
1923 * of time and regardless reclaiming our state is wrong.
1924 * XXX run ic_node_age
1925 */
1926 if (ni == vap->iv_bss)
1927 continue;
1928 if (ni->ni_associd != 0 ||
1929 (vap->iv_opmode == IEEE80211_M_IBSS ||
1930 vap->iv_opmode == IEEE80211_M_AHDEMO)) {
1931 /*
1932 * Age/drain resources held by the station.
1933 */
1934 ic->ic_node_age(ni);
1935 /*
1936 * Probe the station before time it out. We
1937 * send a null data frame which may not be
1938 * universally supported by drivers (need it
1939 * for ps-poll support so it should be...).
1940 *
1941 * XXX don't probe the station unless we've
1942 * received a frame from them (and have
1943 * some idea of the rates they are capable
1944 * of); this will get fixed more properly
1945 * soon with better handling of the rate set.
1946 */
1947 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
1948 (0 < ni->ni_inact &&
1949 ni->ni_inact <= vap->iv_inact_probe) &&
1950 ni->ni_rates.rs_nrates != 0) {
1951 IEEE80211_NOTE(vap,
1952 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
1953 ni, "%s",
1954 "probe station due to inactivity");
1955 /*
1956 * Grab a reference before unlocking the table
1957 * so the node cannot be reclaimed before we
1958 * send the frame. ieee80211_send_nulldata
1959 * understands we've done this and reclaims the
1960 * ref for us as needed.
1961 */
1962 ieee80211_ref_node(ni);
1963 IEEE80211_NODE_UNLOCK(nt);
1964 ieee80211_send_nulldata(ni);
1965 /* XXX stat? */
1966 goto restart;
1967 }
1968 }
1969 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
1970 ni->ni_inact <= 0) {
1971 IEEE80211_NOTE(vap,
1972 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
1973 "station timed out due to inactivity "
1974 "(refcnt %u)", ieee80211_node_refcnt(ni));
1975 /*
1976 * Send a deauthenticate frame and drop the station.
1977 * This is somewhat complicated due to reference counts
1978 * and locking. At this point a station will typically
1979 * have a reference count of 1. ieee80211_node_leave
1980 * will do a "free" of the node which will drop the
1981 * reference count. But in the meantime a reference
1982 * wil be held by the deauth frame. The actual reclaim
1983 * of the node will happen either after the tx is
1984 * completed or by ieee80211_node_leave.
1985 *
1986 * Separately we must drop the node lock before sending
1987 * in case the driver takes a lock, as this can result
1988 * in a LOR between the node lock and the driver lock.
1989 */
1990 ieee80211_ref_node(ni);
1991 IEEE80211_NODE_UNLOCK(nt);
1992 if (ni->ni_associd != 0) {
1993 IEEE80211_SEND_MGMT(ni,
1994 IEEE80211_FC0_SUBTYPE_DEAUTH,
1995 IEEE80211_REASON_AUTH_EXPIRE);
1996 }
1997 ieee80211_node_leave(ni);
1998 ieee80211_free_node(ni);
1999 vap->iv_stats.is_node_timeout++;
2000 goto restart;
2001 }
2002 }
2003 IEEE80211_NODE_UNLOCK(nt);
2004
2005 IEEE80211_NODE_ITERATE_UNLOCK(nt);
2006}
2007
2008/*
2009 * Aggressively reclaim resources. This should be used
2010 * only in a critical situation to reclaim mbuf resources.
2011 */
2012void
2013ieee80211_drain(struct ieee80211com *ic)
2014{
2015 struct ieee80211_node_table *nt = &ic->ic_sta;
2016 struct ieee80211vap *vap;
2017 struct ieee80211_node *ni;
2018
2019 IEEE80211_NODE_LOCK(nt);
2020 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2021 /*
2022 * Ignore entries for which have yet to receive an
2023 * authentication frame. These are transient and
2024 * will be reclaimed when the last reference to them
2025 * goes away (when frame xmits complete).
2026 */
2027 vap = ni->ni_vap;
2028 /*
2029 * Only process stations when in RUN state. This
2030 * insures, for example, that we don't timeout an
2031 * inactive station during CAC. Note that CSA state
2032 * is actually handled in ieee80211_node_timeout as
2033 * it applies to more than timeout processing.
2034 */
2035 if (vap->iv_state != IEEE80211_S_RUN)
2036 continue;
2037 /* XXX can vap be NULL? */
2038 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2039 vap->iv_opmode == IEEE80211_M_STA) &&
2040 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2041 continue;
2042 /*
2043 * Free fragments.
2044 * XXX doesn't belong here, move to node_drain
2045 */
2046 if (ni->ni_rxfrag[0] != NULL) {
2047 m_freem(ni->ni_rxfrag[0]);
2048 ni->ni_rxfrag[0] = NULL;
2049 }
2050 /*
2051 * Drain resources held by the station.
2052 */
2053 ic->ic_node_drain(ni);
2054 }
2055 IEEE80211_NODE_UNLOCK(nt);
2056}
2057
2058/*
2059 * Per-ieee80211com inactivity timer callback.
2060 */
2061void
2062ieee80211_node_timeout(void *arg)
2063{
2064 struct ieee80211com *ic = arg;
2065
2066 /*
2067 * Defer timeout processing if a channel switch is pending.
2068 * We typically need to be mute so not doing things that
2069 * might generate frames is good to handle in one place.
2070 * Supressing the station timeout processing may extend the
2071 * lifetime of inactive stations (by not decrementing their
2072 * idle counters) but this should be ok unless the CSA is
2073 * active for an unusually long time.
2074 */
2075 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
2076 ieee80211_scan_timeout(ic);
2077 ieee80211_timeout_stations(ic);
2078
2079 IEEE80211_LOCK(ic);
2080 ieee80211_erp_timeout(ic);
2081 ieee80211_ht_timeout(ic);
2082 IEEE80211_UNLOCK(ic);
2083 }
2084 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
2085 ieee80211_node_timeout, ic);
2086}
2087
2088void
2089ieee80211_iterate_nodes(struct ieee80211_node_table *nt,
2090 ieee80211_iter_func *f, void *arg)
2091{
2092 struct ieee80211_node *ni;
2093 u_int gen;
2094
2095 IEEE80211_NODE_ITERATE_LOCK(nt);
2096 gen = ++nt->nt_scangen;
2097restart:
2098 IEEE80211_NODE_LOCK(nt);
2099 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2100 if (ni->ni_scangen != gen) {
2101 ni->ni_scangen = gen;
2102 (void) ieee80211_ref_node(ni);
2103 IEEE80211_NODE_UNLOCK(nt);
2104 (*f)(arg, ni);
2105 ieee80211_free_node(ni);
2106 goto restart;
2107 }
2108 }
2109 IEEE80211_NODE_UNLOCK(nt);
2110
2111 IEEE80211_NODE_ITERATE_UNLOCK(nt);
2112}
2113
2114void
2115ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2116{
2117 printf("0x%p: mac %s refcnt %d\n", ni,
2118 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
2119 printf("\tscangen %u authmode %u flags 0x%x\n",
2120 ni->ni_scangen, ni->ni_authmode, ni->ni_flags);
2121 printf("\tassocid 0x%x txpower %u vlan %u\n",
2122 ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
2123 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
2124 ni->ni_txseqs[IEEE80211_NONQOS_TID],
2125 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT,
2126 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK,
2127 ni->ni_rxfragstamp);
2128 printf("\trssi %d noise %d intval %u capinfo 0x%x\n",
2129 node_getrssi(ni), ni->ni_noise,
2130 ni->ni_intval, ni->ni_capinfo);
2131 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n",
2132 ether_sprintf(ni->ni_bssid),
2133 ni->ni_esslen, ni->ni_essid,
2134 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags);
2135 printf("\tinact %u inact_reload %u txrate %u\n",
2136 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate);
2137 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n",
2138 ni->ni_htcap, ni->ni_htparam,
2139 ni->ni_htctlchan, ni->ni_ht2ndchan);
2140 printf("\thtopmode %x htstbc %x chw %u\n",
2141 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw);
2142}
2143
2144void
2145ieee80211_dump_nodes(struct ieee80211_node_table *nt)
2146{
2147 ieee80211_iterate_nodes(nt,
2148 (ieee80211_iter_func *) ieee80211_dump_node, nt);
2149}
2150
2151static void
2152ieee80211_notify_erp_locked(struct ieee80211com *ic)
2153{
2154 struct ieee80211vap *vap;
2155
2156 IEEE80211_LOCK_ASSERT(ic);
2157
2158 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
2159 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2160 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP);
2161}
2162
2163void
2164ieee80211_notify_erp(struct ieee80211com *ic)
2165{
2166 IEEE80211_LOCK(ic);
2167 ieee80211_notify_erp_locked(ic);
2168 IEEE80211_UNLOCK(ic);
2169}
2170
2171/*
2172 * Handle a station joining an 11g network.
2173 */
2174static void
2175ieee80211_node_join_11g(struct ieee80211_node *ni)
2176{
2177 struct ieee80211com *ic = ni->ni_ic;
2178
2179 IEEE80211_LOCK_ASSERT(ic);
2180
2181 /*
2182 * Station isn't capable of short slot time. Bump
2183 * the count of long slot time stations and disable
2184 * use of short slot time. Note that the actual switch
2185 * over to long slot time use may not occur until the
2186 * next beacon transmission (per sec. 7.3.1.4 of 11g).
2187 */
2188 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2189 ic->ic_longslotsta++;
2190 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2191 "station needs long slot time, count %d",
2192 ic->ic_longslotsta);
2193 /* XXX vap's w/ conflicting needs won't work */
2194 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) {
2195 /*
2196 * Don't force slot time when switched to turbo
2197 * mode as non-ERP stations won't be present; this
2198 * need only be done when on the normal G channel.
2199 */
2200 ieee80211_set_shortslottime(ic, 0);
2201 }
2202 }
2203 /*
2204 * If the new station is not an ERP station
2205 * then bump the counter and enable protection
2206 * if configured.
2207 */
2208 if (!ieee80211_iserp_rateset(&ni->ni_rates)) {
2209 ic->ic_nonerpsta++;
2210 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2211 "station is !ERP, %d non-ERP stations associated",
2212 ic->ic_nonerpsta);
2213 /*
2214 * If station does not support short preamble
2215 * then we must enable use of Barker preamble.
2216 */
2217 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
2218 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2219 "%s", "station needs long preamble");
2220 ic->ic_flags |= IEEE80211_F_USEBARKER;
2221 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
2222 }
2223 /*
2224 * If protection is configured and this is the first
2225 * indication we should use protection, enable it.
2226 */
2227 if (ic->ic_protmode != IEEE80211_PROT_NONE &&
2228 ic->ic_nonerpsta == 1 &&
2229 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2230 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2231 "%s: enable use of protection\n", __func__);
2232 ic->ic_flags |= IEEE80211_F_USEPROT;
2233 ieee80211_notify_erp_locked(ic);
2234 }
2235 } else
2236 ni->ni_flags |= IEEE80211_NODE_ERP;
2237}
2238
2239void
2240ieee80211_node_join(struct ieee80211_node *ni, int resp)
2241{
2242 struct ieee80211com *ic = ni->ni_ic;
2243 struct ieee80211vap *vap = ni->ni_vap;
2244 int newassoc;
2245
2246 if (ni->ni_associd == 0) {
2247 uint16_t aid;
2248
2249 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap"));
2250 /*
2251 * It would be good to search the bitmap
2252 * more efficiently, but this will do for now.
2253 */
2254 for (aid = 1; aid < vap->iv_max_aid; aid++) {
2255 if (!IEEE80211_AID_ISSET(vap, aid))
2256 break;
2257 }
2258 if (aid >= vap->iv_max_aid) {
2259 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY);
2260 ieee80211_node_leave(ni);
2261 return;
2262 }
2263 ni->ni_associd = aid | 0xc000;
2264 ni->ni_jointime = time_uptime;
2265 IEEE80211_LOCK(ic);
2266 IEEE80211_AID_SET(vap, ni->ni_associd);
2267 vap->iv_sta_assoc++;
2268 ic->ic_sta_assoc++;
2269
2270 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2271 ieee80211_ht_node_join(ni);
2272 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2273 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2274 ieee80211_node_join_11g(ni);
2275 IEEE80211_UNLOCK(ic);
2276
2277 newassoc = 1;
2278 } else
2279 newassoc = 0;
2280
2281 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2282 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s",
2283 IEEE80211_NODE_AID(ni),
2284 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
2285 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
2286 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "",
2287 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
2288 ni->ni_flags & IEEE80211_NODE_HT ?
2289 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
2290 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
2291 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
2292 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
2293 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
2294 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
2295 ", fast-frames" : "",
2296 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
2297 ", turbo" : ""
2298 );
2299
2300 node_setuptxparms(ni);
2301 /* give driver a chance to setup state like ni_txrate */
2302 if (ic->ic_newassoc != NULL)
2303 ic->ic_newassoc(ni, newassoc);
2304 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS);
2305 /* tell the authenticator about new station */
2306 if (vap->iv_auth->ia_node_join != NULL)
2307 vap->iv_auth->ia_node_join(ni);
2308 ieee80211_notify_node_join(ni,
2309 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
2310}
2311
2312static void
2313disable_protection(struct ieee80211com *ic)
2314{
2315 KASSERT(ic->ic_nonerpsta == 0 &&
2316 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0,
2317 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta,
2318 ic->ic_flags_ext));
2319
2320 ic->ic_flags &= ~IEEE80211_F_USEPROT;
2321 /* XXX verify mode? */
2322 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
2323 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
2324 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
2325 }
2326 ieee80211_notify_erp_locked(ic);
2327}
2328
2329/*
2330 * Handle a station leaving an 11g network.
2331 */
2332static void
2333ieee80211_node_leave_11g(struct ieee80211_node *ni)
2334{
2335 struct ieee80211com *ic = ni->ni_ic;
2336
2337 IEEE80211_LOCK_ASSERT(ic);
2338
2339 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan),
2340 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq,
2341 ic->ic_bsschan->ic_flags));
2342
2343 /*
2344 * If a long slot station do the slot time bookkeeping.
2345 */
2346 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2347 KASSERT(ic->ic_longslotsta > 0,
2348 ("bogus long slot station count %d", ic->ic_longslotsta));
2349 ic->ic_longslotsta--;
2350 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2351 "long slot time station leaves, count now %d",
2352 ic->ic_longslotsta);
2353 if (ic->ic_longslotsta == 0) {
2354 /*
2355 * Re-enable use of short slot time if supported
2356 * and not operating in IBSS mode (per spec).
2357 */
2358 if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
2359 ic->ic_opmode != IEEE80211_M_IBSS) {
2360 IEEE80211_DPRINTF(ni->ni_vap,
2361 IEEE80211_MSG_ASSOC,
2362 "%s: re-enable use of short slot time\n",
2363 __func__);
2364 ieee80211_set_shortslottime(ic, 1);
2365 }
2366 }
2367 }
2368 /*
2369 * If a non-ERP station do the protection-related bookkeeping.
2370 */
2371 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
2372 KASSERT(ic->ic_nonerpsta > 0,
2373 ("bogus non-ERP station count %d", ic->ic_nonerpsta));
2374 ic->ic_nonerpsta--;
2375 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2376 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta,
2377 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ?
2378 " (non-ERP sta present)" : "");
2379 if (ic->ic_nonerpsta == 0 &&
2380 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2381 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2382 "%s: disable use of protection\n", __func__);
2383 disable_protection(ic);
2384 }
2385 }
2386}
2387
2388/*
2389 * Time out presence of an overlapping bss with non-ERP
2390 * stations. When operating in hostap mode we listen for
2391 * beacons from other stations and if we identify a non-ERP
2392 * station is present we enable protection. To identify
2393 * when all non-ERP stations are gone we time out this
2394 * condition.
2395 */
2396static void
2397ieee80211_erp_timeout(struct ieee80211com *ic)
2398{
2399
2400 IEEE80211_LOCK_ASSERT(ic);
2401
2402 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) &&
2403 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) {
2404#if 0
2405 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2406 "%s", "age out non-ERP sta present on channel");
2407#endif
2408 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
2409 if (ic->ic_nonerpsta == 0)
2410 disable_protection(ic);
2411 }
2412}
2413
2414/*
2415 * Handle bookkeeping for station deauthentication/disassociation
2416 * when operating as an ap.
2417 */
2418void
2419ieee80211_node_leave(struct ieee80211_node *ni)
2420{
2421 struct ieee80211com *ic = ni->ni_ic;
2422 struct ieee80211vap *vap = ni->ni_vap;
2423 struct ieee80211_node_table *nt = ni->ni_table;
2424
2425 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2426 "station with aid %d leaves", IEEE80211_NODE_AID(ni));
2427
2428 KASSERT(vap->iv_opmode != IEEE80211_M_STA,
2429 ("unexpected operating mode %u", vap->iv_opmode));
2430 /*
2431 * If node wasn't previously associated all
2432 * we need to do is reclaim the reference.
2433 */
2434 /* XXX ibss mode bypasses 11g and notification */
2435 if (ni->ni_associd == 0)
2436 goto done;
2437 /*
2438 * Tell the authenticator the station is leaving.
2439 * Note that we must do this before yanking the
2440 * association id as the authenticator uses the
2441 * associd to locate it's state block.
2442 */
2443 if (vap->iv_auth->ia_node_leave != NULL)
2444 vap->iv_auth->ia_node_leave(ni);
2445
2446 IEEE80211_LOCK(ic);
2447 IEEE80211_AID_CLR(vap, ni->ni_associd);
2448 ni->ni_associd = 0;
2449 vap->iv_sta_assoc--;
2450 ic->ic_sta_assoc--;
2451
2452 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2453 ieee80211_ht_node_leave(ni);
2454 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2455 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2456 ieee80211_node_leave_11g(ni);
2457 IEEE80211_UNLOCK(ic);
2458 /*
2459 * Cleanup station state. In particular clear various
2460 * state that might otherwise be reused if the node
2461 * is reused before the reference count goes to zero
2462 * (and memory is reclaimed).
2463 */
2464 ieee80211_sta_leave(ni);
2465done:
2466 /*
2467 * Remove the node from any table it's recorded in and
2468 * drop the caller's reference. Removal from the table
2469 * is important to insure the node is not reprocessed
2470 * for inactivity.
2471 */
2472 if (nt != NULL) {
2473 IEEE80211_NODE_LOCK(nt);
2474 node_reclaim(nt, ni);
2475 IEEE80211_NODE_UNLOCK(nt);
2476 } else
2477 ieee80211_free_node(ni);
2478}
2479
2480struct rssiinfo {
2481 struct ieee80211vap *vap;
2482 int rssi_samples;
2483 uint32_t rssi_total;
2484};
2485
2486static void
2487get_hostap_rssi(void *arg, struct ieee80211_node *ni)
2488{
2489 struct rssiinfo *info = arg;
2490 struct ieee80211vap *vap = ni->ni_vap;
2491 int8_t rssi;
2492
2493 if (info->vap != vap)
2494 return;
2495 /* only associated stations */
2496 if (ni->ni_associd == 0)
2497 return;
2498 rssi = vap->iv_ic->ic_node_getrssi(ni);
2499 if (rssi != 0) {
2500 info->rssi_samples++;
2501 info->rssi_total += rssi;
2502 }
2503}
2504
2505static void
2506get_adhoc_rssi(void *arg, struct ieee80211_node *ni)
2507{
2508 struct rssiinfo *info = arg;
2509 struct ieee80211vap *vap = ni->ni_vap;
2510 int8_t rssi;
2511
2512 if (info->vap != vap)
2513 return;
2514 /* only neighbors */
2515 /* XXX check bssid */
2516 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
2517 return;
2518 rssi = vap->iv_ic->ic_node_getrssi(ni);
2519 if (rssi != 0) {
2520 info->rssi_samples++;
2521 info->rssi_total += rssi;
2522 }
2523}
2524
2525int8_t
2526ieee80211_getrssi(struct ieee80211vap *vap)
2527{
2528#define NZ(x) ((x) == 0 ? 1 : (x))
2529 struct ieee80211com *ic = vap->iv_ic;
2530 struct rssiinfo info;
2531
2532 info.rssi_total = 0;
2533 info.rssi_samples = 0;
2534 info.vap = vap;
2535 switch (vap->iv_opmode) {
2536 case IEEE80211_M_IBSS: /* average of all ibss neighbors */
2537 case IEEE80211_M_AHDEMO: /* average of all neighbors */
2538 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info);
2539 break;
2540 case IEEE80211_M_HOSTAP: /* average of all associated stations */
2541 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info);
2542 break;
2543 case IEEE80211_M_MONITOR: /* XXX */
2544 case IEEE80211_M_STA: /* use stats from associated ap */
2545 default:
2546 if (vap->iv_bss != NULL)
2547 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss);
2548 info.rssi_samples = 1;
2549 break;
2550 }
2551 return info.rssi_total / NZ(info.rssi_samples);
2552#undef NZ
2553}
2554
2555void
2556ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise)
2557{
2558
2559 if (vap->iv_bss == NULL) /* NB: shouldn't happen */
2560 return;
2561 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise);
2562 /* for non-station mode return avg'd rssi accounting */
2563 if (vap->iv_opmode != IEEE80211_M_STA)
2564 *rssi = ieee80211_getrssi(vap);
2565}
| 1208 /*
1209 * Device is HT-capable and HT is enabled for
1210 * the vap; setup HT operation. On return
1211 * ni_chan will be adjusted to an HT channel.
1212 */
1213 ieee80211_ht_wds_init(ni);
1214 } else {
1215 struct ieee80211_channel *c = ni->ni_chan;
1216 /*
1217 * Force a legacy channel to be used.
1218 */
1219 c = ieee80211_find_channel(ic,
1220 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT);
1221 KASSERT(c != NULL, ("no legacy channel, %u/%x",
1222 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags));
1223 ni->ni_chan = c;
1224 }
1225 }
1226 return ni;
1227}
1228
1229struct ieee80211_node *
1230#ifdef IEEE80211_DEBUG_REFCNT
1231ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt,
1232 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1233#else
1234ieee80211_find_node_locked(struct ieee80211_node_table *nt,
1235 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1236#endif
1237{
1238 struct ieee80211_node *ni;
1239 int hash;
1240
1241 IEEE80211_NODE_LOCK_ASSERT(nt);
1242
1243 hash = IEEE80211_NODE_HASH(macaddr);
1244 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1245 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1246 ieee80211_ref_node(ni); /* mark referenced */
1247#ifdef IEEE80211_DEBUG_REFCNT
1248 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1249 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1250 func, line,
1251 ni, ether_sprintf(ni->ni_macaddr),
1252 ieee80211_node_refcnt(ni));
1253#endif
1254 return ni;
1255 }
1256 }
1257 return NULL;
1258}
1259
1260struct ieee80211_node *
1261#ifdef IEEE80211_DEBUG_REFCNT
1262ieee80211_find_node_debug(struct ieee80211_node_table *nt,
1263 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1264#else
1265ieee80211_find_node(struct ieee80211_node_table *nt,
1266 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1267#endif
1268{
1269 struct ieee80211_node *ni;
1270
1271 IEEE80211_NODE_LOCK(nt);
1272 ni = ieee80211_find_node_locked(nt, macaddr);
1273 IEEE80211_NODE_UNLOCK(nt);
1274 return ni;
1275}
1276
1277struct ieee80211_node *
1278#ifdef IEEE80211_DEBUG_REFCNT
1279ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt,
1280 const struct ieee80211vap *vap,
1281 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1282#else
1283ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt,
1284 const struct ieee80211vap *vap,
1285 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1286#endif
1287{
1288 struct ieee80211_node *ni;
1289 int hash;
1290
1291 IEEE80211_NODE_LOCK_ASSERT(nt);
1292
1293 hash = IEEE80211_NODE_HASH(macaddr);
1294 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
1295 if (ni->ni_vap == vap &&
1296 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
1297 ieee80211_ref_node(ni); /* mark referenced */
1298#ifdef IEEE80211_DEBUG_REFCNT
1299 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1300 "%s (%s:%u) %p<%s> refcnt %d\n", __func__,
1301 func, line,
1302 ni, ether_sprintf(ni->ni_macaddr),
1303 ieee80211_node_refcnt(ni));
1304#endif
1305 return ni;
1306 }
1307 }
1308 return NULL;
1309}
1310
1311struct ieee80211_node *
1312#ifdef IEEE80211_DEBUG_REFCNT
1313ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt,
1314 const struct ieee80211vap *vap,
1315 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line)
1316#else
1317ieee80211_find_vap_node(struct ieee80211_node_table *nt,
1318 const struct ieee80211vap *vap,
1319 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1320#endif
1321{
1322 struct ieee80211_node *ni;
1323
1324 IEEE80211_NODE_LOCK(nt);
1325 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr);
1326 IEEE80211_NODE_UNLOCK(nt);
1327 return ni;
1328}
1329
1330/*
1331 * Fake up a node; this handles node discovery in adhoc mode.
1332 * Note that for the driver's benefit we we treat this like
1333 * an association so the driver has an opportunity to setup
1334 * it's private state.
1335 */
1336struct ieee80211_node *
1337ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap,
1338 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1339{
1340 struct ieee80211_node *ni;
1341
1342 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1343 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr));
1344 ni = ieee80211_dup_bss(vap, macaddr);
1345 if (ni != NULL) {
1346 struct ieee80211com *ic = vap->iv_ic;
1347
1348 /* XXX no rate negotiation; just dup */
1349 ni->ni_rates = vap->iv_bss->ni_rates;
1350 if (ieee80211_iserp_rateset(&ni->ni_rates))
1351 ni->ni_flags |= IEEE80211_NODE_ERP;
1352 if (vap->iv_opmode == IEEE80211_M_AHDEMO) {
1353 /*
1354 * In adhoc demo mode there are no management
1355 * frames to use to discover neighbor capabilities,
1356 * so blindly propagate the local configuration
1357 * so we can do interesting things (e.g. use
1358 * WME to disable ACK's).
1359 */
1360 if (vap->iv_flags & IEEE80211_F_WME)
1361 ni->ni_flags |= IEEE80211_NODE_QOS;
1362#ifdef IEEE80211_SUPPORT_SUPERG
1363 if (vap->iv_flags & IEEE80211_F_FF)
1364 ni->ni_flags |= IEEE80211_NODE_FF;
1365#endif
1366 }
1367 node_setuptxparms(ni);
1368 if (ic->ic_newassoc != NULL)
1369 ic->ic_newassoc(ni, 1);
1370 /* XXX not right for 802.1x/WPA */
1371 ieee80211_node_authorize(ni);
1372 }
1373 return ni;
1374}
1375
1376void
1377ieee80211_init_neighbor(struct ieee80211_node *ni,
1378 const struct ieee80211_frame *wh,
1379 const struct ieee80211_scanparams *sp)
1380{
1381 ni->ni_esslen = sp->ssid[1];
1382 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
1383 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
1384 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
1385 ni->ni_intval = sp->bintval;
1386 ni->ni_capinfo = sp->capinfo;
1387 ni->ni_chan = ni->ni_ic->ic_curchan;
1388 ni->ni_fhdwell = sp->fhdwell;
1389 ni->ni_fhindex = sp->fhindex;
1390 ni->ni_erp = sp->erp;
1391 ni->ni_timoff = sp->timoff;
1392
1393 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) {
1394 ieee80211_ies_expand(&ni->ni_ies);
1395 if (ni->ni_ies.wme_ie != NULL)
1396 ni->ni_flags |= IEEE80211_NODE_QOS;
1397 else
1398 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1399#ifdef IEEE80211_SUPPORT_SUPERG
1400 if (ni->ni_ies.ath_ie != NULL)
1401 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
1402#endif
1403 }
1404
1405 /* NB: must be after ni_chan is setup */
1406 ieee80211_setup_rates(ni, sp->rates, sp->xrates,
1407 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1408 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1409}
1410
1411/*
1412 * Do node discovery in adhoc mode on receipt of a beacon
1413 * or probe response frame. Note that for the driver's
1414 * benefit we we treat this like an association so the
1415 * driver has an opportunity to setup it's private state.
1416 */
1417struct ieee80211_node *
1418ieee80211_add_neighbor(struct ieee80211vap *vap,
1419 const struct ieee80211_frame *wh,
1420 const struct ieee80211_scanparams *sp)
1421{
1422 struct ieee80211_node *ni;
1423
1424 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1425 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2));
1426 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */
1427 if (ni != NULL) {
1428 struct ieee80211com *ic = vap->iv_ic;
1429
1430 ieee80211_init_neighbor(ni, wh, sp);
1431 if (ieee80211_iserp_rateset(&ni->ni_rates))
1432 ni->ni_flags |= IEEE80211_NODE_ERP;
1433 node_setuptxparms(ni);
1434 if (ic->ic_newassoc != NULL)
1435 ic->ic_newassoc(ni, 1);
1436 /* XXX not right for 802.1x/WPA */
1437 ieee80211_node_authorize(ni);
1438 }
1439 return ni;
1440}
1441
1442#define IS_PROBEREQ(wh) \
1443 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \
1444 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
1445#define IS_BCAST_PROBEREQ(wh) \
1446 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \
1447 ((const struct ieee80211_frame *)(wh))->i_addr3))
1448
1449static __inline struct ieee80211_node *
1450_find_rxnode(struct ieee80211_node_table *nt,
1451 const struct ieee80211_frame_min *wh)
1452{
1453 if (IS_BCAST_PROBEREQ(wh))
1454 return NULL; /* spam bcast probe req to all vap's */
1455 return ieee80211_find_node_locked(nt, wh->i_addr2);
1456}
1457
1458/*
1459 * Locate the node for sender, track state, and then pass the
1460 * (referenced) node up to the 802.11 layer for its use. Note
1461 * we can return NULL if the sender is not in the table.
1462 */
1463struct ieee80211_node *
1464#ifdef IEEE80211_DEBUG_REFCNT
1465ieee80211_find_rxnode_debug(struct ieee80211com *ic,
1466 const struct ieee80211_frame_min *wh, const char *func, int line)
1467#else
1468ieee80211_find_rxnode(struct ieee80211com *ic,
1469 const struct ieee80211_frame_min *wh)
1470#endif
1471{
1472 struct ieee80211_node_table *nt;
1473 struct ieee80211_node *ni;
1474
1475 nt = &ic->ic_sta;
1476 IEEE80211_NODE_LOCK(nt);
1477 ni = _find_rxnode(nt, wh);
1478 IEEE80211_NODE_UNLOCK(nt);
1479
1480 return ni;
1481}
1482
1483/*
1484 * Like ieee80211_find_rxnode but use the supplied h/w
1485 * key index as a hint to locate the node in the key
1486 * mapping table. If an entry is present at the key
1487 * index we return it; otherwise do a normal lookup and
1488 * update the mapping table if the station has a unicast
1489 * key assigned to it.
1490 */
1491struct ieee80211_node *
1492#ifdef IEEE80211_DEBUG_REFCNT
1493ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic,
1494 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
1495 const char *func, int line)
1496#else
1497ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
1498 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix)
1499#endif
1500{
1501 struct ieee80211_node_table *nt;
1502 struct ieee80211_node *ni;
1503
1504 nt = &ic->ic_sta;
1505 IEEE80211_NODE_LOCK(nt);
1506 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
1507 ni = nt->nt_keyixmap[keyix];
1508 else
1509 ni = NULL;
1510 if (ni == NULL) {
1511 ni = _find_rxnode(nt, wh);
1512 if (ni != NULL && nt->nt_keyixmap != NULL) {
1513 /*
1514 * If the station has a unicast key cache slot
1515 * assigned update the key->node mapping table.
1516 */
1517 keyix = ni->ni_ucastkey.wk_rxkeyix;
1518 /* XXX can keyixmap[keyix] != NULL? */
1519 if (keyix < nt->nt_keyixmax &&
1520 nt->nt_keyixmap[keyix] == NULL) {
1521 IEEE80211_DPRINTF(ni->ni_vap,
1522 IEEE80211_MSG_NODE,
1523 "%s: add key map entry %p<%s> refcnt %d\n",
1524 __func__, ni, ether_sprintf(ni->ni_macaddr),
1525 ieee80211_node_refcnt(ni)+1);
1526 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
1527 }
1528 }
1529 } else {
1530 if (IS_BCAST_PROBEREQ(wh))
1531 ni = NULL; /* spam bcast probe req to all vap's */
1532 else
1533 ieee80211_ref_node(ni);
1534 }
1535 IEEE80211_NODE_UNLOCK(nt);
1536
1537 return ni;
1538}
1539#undef IS_BCAST_PROBEREQ
1540#undef IS_PROBEREQ
1541
1542/*
1543 * Return a reference to the appropriate node for sending
1544 * a data frame. This handles node discovery in adhoc networks.
1545 */
1546struct ieee80211_node *
1547#ifdef IEEE80211_DEBUG_REFCNT
1548ieee80211_find_txnode_debug(struct ieee80211vap *vap,
1549 const uint8_t macaddr[IEEE80211_ADDR_LEN],
1550 const char *func, int line)
1551#else
1552ieee80211_find_txnode(struct ieee80211vap *vap,
1553 const uint8_t macaddr[IEEE80211_ADDR_LEN])
1554#endif
1555{
1556 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta;
1557 struct ieee80211_node *ni;
1558
1559 /*
1560 * The destination address should be in the node table
1561 * unless this is a multicast/broadcast frame. We can
1562 * also optimize station mode operation, all frames go
1563 * to the bss node.
1564 */
1565 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */
1566 IEEE80211_NODE_LOCK(nt);
1567 if (vap->iv_opmode == IEEE80211_M_STA ||
1568 vap->iv_opmode == IEEE80211_M_WDS ||
1569 IEEE80211_IS_MULTICAST(macaddr))
1570 ni = ieee80211_ref_node(vap->iv_bss);
1571 else
1572 ni = ieee80211_find_node_locked(nt, macaddr);
1573 IEEE80211_NODE_UNLOCK(nt);
1574
1575 if (ni == NULL) {
1576 if (vap->iv_opmode == IEEE80211_M_IBSS ||
1577 vap->iv_opmode == IEEE80211_M_AHDEMO) {
1578 /*
1579 * In adhoc mode cons up a node for the destination.
1580 * Note that we need an additional reference for the
1581 * caller to be consistent with
1582 * ieee80211_find_node_locked.
1583 */
1584 ni = ieee80211_fakeup_adhoc_node(vap, macaddr);
1585 if (ni != NULL)
1586 (void) ieee80211_ref_node(ni);
1587 } else {
1588 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr,
1589 "no node, discard frame (%s)", __func__);
1590 vap->iv_stats.is_tx_nonode++;
1591 }
1592 }
1593 return ni;
1594}
1595
1596static void
1597_ieee80211_free_node(struct ieee80211_node *ni)
1598{
1599 struct ieee80211_node_table *nt = ni->ni_table;
1600
1601 /*
1602 * NB: careful about referencing the vap as it may be
1603 * gone if the last reference was held by a driver.
1604 * We know the com will always be present so it's safe
1605 * to use ni_ic below to reclaim resources.
1606 */
1607#if 0
1608 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1609 "%s %p<%s> in %s table\n", __func__, ni,
1610 ether_sprintf(ni->ni_macaddr),
1611 nt != NULL ? nt->nt_name : "<gone>");
1612#endif
1613 if (ni->ni_associd != 0) {
1614 struct ieee80211vap *vap = ni->ni_vap;
1615 if (vap->iv_aid_bitmap != NULL)
1616 IEEE80211_AID_CLR(vap, ni->ni_associd);
1617 }
1618 if (nt != NULL) {
1619 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1620 LIST_REMOVE(ni, ni_hash);
1621 }
1622 ni->ni_ic->ic_node_free(ni);
1623}
1624
1625void
1626#ifdef IEEE80211_DEBUG_REFCNT
1627ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line)
1628#else
1629ieee80211_free_node(struct ieee80211_node *ni)
1630#endif
1631{
1632 struct ieee80211_node_table *nt = ni->ni_table;
1633
1634#ifdef IEEE80211_DEBUG_REFCNT
1635 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1636 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
1637 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1);
1638#endif
1639 if (nt != NULL) {
1640 IEEE80211_NODE_LOCK(nt);
1641 if (ieee80211_node_dectestref(ni)) {
1642 /*
1643 * Last reference, reclaim state.
1644 */
1645 _ieee80211_free_node(ni);
1646 } else if (ieee80211_node_refcnt(ni) == 1 &&
1647 nt->nt_keyixmap != NULL) {
1648 ieee80211_keyix keyix;
1649 /*
1650 * Check for a last reference in the key mapping table.
1651 */
1652 keyix = ni->ni_ucastkey.wk_rxkeyix;
1653 if (keyix < nt->nt_keyixmax &&
1654 nt->nt_keyixmap[keyix] == ni) {
1655 IEEE80211_DPRINTF(ni->ni_vap,
1656 IEEE80211_MSG_NODE,
1657 "%s: %p<%s> clear key map entry", __func__,
1658 ni, ether_sprintf(ni->ni_macaddr));
1659 nt->nt_keyixmap[keyix] = NULL;
1660 ieee80211_node_decref(ni); /* XXX needed? */
1661 _ieee80211_free_node(ni);
1662 }
1663 }
1664 IEEE80211_NODE_UNLOCK(nt);
1665 } else {
1666 if (ieee80211_node_dectestref(ni))
1667 _ieee80211_free_node(ni);
1668 }
1669}
1670
1671/*
1672 * Reclaim a unicast key and clear any key cache state.
1673 */
1674int
1675ieee80211_node_delucastkey(struct ieee80211_node *ni)
1676{
1677 struct ieee80211com *ic = ni->ni_ic;
1678 struct ieee80211_node_table *nt = &ic->ic_sta;
1679 struct ieee80211_node *nikey;
1680 ieee80211_keyix keyix;
1681 int isowned, status;
1682
1683 /*
1684 * NB: We must beware of LOR here; deleting the key
1685 * can cause the crypto layer to block traffic updates
1686 * which can generate a LOR against the node table lock;
1687 * grab it here and stash the key index for our use below.
1688 *
1689 * Must also beware of recursion on the node table lock.
1690 * When called from node_cleanup we may already have
1691 * the node table lock held. Unfortunately there's no
1692 * way to separate out this path so we must do this
1693 * conditionally.
1694 */
1695 isowned = IEEE80211_NODE_IS_LOCKED(nt);
1696 if (!isowned)
1697 IEEE80211_NODE_LOCK(nt);
1698 nikey = NULL;
1699 status = 1; /* NB: success */
1700 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) {
1701 keyix = ni->ni_ucastkey.wk_rxkeyix;
1702 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey);
1703 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
1704 nikey = nt->nt_keyixmap[keyix];
1705 nt->nt_keyixmap[keyix] = NULL;;
1706 }
1707 }
1708 if (!isowned)
1709 IEEE80211_NODE_UNLOCK(nt);
1710
1711 if (nikey != NULL) {
1712 KASSERT(nikey == ni,
1713 ("key map out of sync, ni %p nikey %p", ni, nikey));
1714 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1715 "%s: delete key map entry %p<%s> refcnt %d\n",
1716 __func__, ni, ether_sprintf(ni->ni_macaddr),
1717 ieee80211_node_refcnt(ni)-1);
1718 ieee80211_free_node(ni);
1719 }
1720 return status;
1721}
1722
1723/*
1724 * Reclaim a node. If this is the last reference count then
1725 * do the normal free work. Otherwise remove it from the node
1726 * table and mark it gone by clearing the back-reference.
1727 */
1728static void
1729node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
1730{
1731 ieee80211_keyix keyix;
1732
1733 IEEE80211_NODE_LOCK_ASSERT(nt);
1734
1735 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1736 "%s: remove %p<%s> from %s table, refcnt %d\n",
1737 __func__, ni, ether_sprintf(ni->ni_macaddr),
1738 nt->nt_name, ieee80211_node_refcnt(ni)-1);
1739 /*
1740 * Clear any entry in the unicast key mapping table.
1741 * We need to do it here so rx lookups don't find it
1742 * in the mapping table even if it's not in the hash
1743 * table. We cannot depend on the mapping table entry
1744 * being cleared because the node may not be free'd.
1745 */
1746 keyix = ni->ni_ucastkey.wk_rxkeyix;
1747 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
1748 nt->nt_keyixmap[keyix] == ni) {
1749 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE,
1750 "%s: %p<%s> clear key map entry %u\n",
1751 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix);
1752 nt->nt_keyixmap[keyix] = NULL;
1753 ieee80211_node_decref(ni); /* NB: don't need free */
1754 }
1755 if (!ieee80211_node_dectestref(ni)) {
1756 /*
1757 * Other references are present, just remove the
1758 * node from the table so it cannot be found. When
1759 * the references are dropped storage will be
1760 * reclaimed.
1761 */
1762 TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
1763 LIST_REMOVE(ni, ni_hash);
1764 ni->ni_table = NULL; /* clear reference */
1765 } else
1766 _ieee80211_free_node(ni);
1767}
1768
1769/*
1770 * Node table support.
1771 */
1772
1773static void
1774ieee80211_node_table_init(struct ieee80211com *ic,
1775 struct ieee80211_node_table *nt,
1776 const char *name, int inact, int keyixmax)
1777{
1778 struct ifnet *ifp = ic->ic_ifp;
1779
1780 nt->nt_ic = ic;
1781 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname);
1782 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname);
1783 TAILQ_INIT(&nt->nt_node);
1784 nt->nt_name = name;
1785 nt->nt_scangen = 1;
1786 nt->nt_inact_init = inact;
1787 nt->nt_keyixmax = keyixmax;
1788 if (nt->nt_keyixmax > 0) {
1789 nt->nt_keyixmap = (struct ieee80211_node **) malloc(
1790 keyixmax * sizeof(struct ieee80211_node *),
1791 M_80211_NODE, M_NOWAIT | M_ZERO);
1792 if (nt->nt_keyixmap == NULL)
1793 if_printf(ic->ic_ifp,
1794 "Cannot allocate key index map with %u entries\n",
1795 keyixmax);
1796 } else
1797 nt->nt_keyixmap = NULL;
1798}
1799
1800static void
1801ieee80211_node_table_reset(struct ieee80211_node_table *nt,
1802 struct ieee80211vap *match)
1803{
1804 struct ieee80211_node *ni, *next;
1805
1806 IEEE80211_NODE_LOCK(nt);
1807 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) {
1808 if (match != NULL && ni->ni_vap != match)
1809 continue;
1810 /* XXX can this happen? if so need's work */
1811 if (ni->ni_associd != 0) {
1812 struct ieee80211vap *vap = ni->ni_vap;
1813
1814 if (vap->iv_auth->ia_node_leave != NULL)
1815 vap->iv_auth->ia_node_leave(ni);
1816 if (vap->iv_aid_bitmap != NULL)
1817 IEEE80211_AID_CLR(vap, ni->ni_associd);
1818 }
1819 ni->ni_wdsvap = NULL; /* clear reference */
1820 node_reclaim(nt, ni);
1821 }
1822 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) {
1823 /*
1824 * Make a separate pass to clear references to this vap
1825 * held by DWDS entries. They will not be matched above
1826 * because ni_vap will point to the ap vap but we still
1827 * need to clear ni_wdsvap when the WDS vap is destroyed
1828 * and/or reset.
1829 */
1830 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next)
1831 if (ni->ni_wdsvap == match)
1832 ni->ni_wdsvap = NULL;
1833 }
1834 IEEE80211_NODE_UNLOCK(nt);
1835}
1836
1837static void
1838ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
1839{
1840 ieee80211_node_table_reset(nt, NULL);
1841 if (nt->nt_keyixmap != NULL) {
1842#ifdef DIAGNOSTIC
1843 /* XXX verify all entries are NULL */
1844 int i;
1845 for (i = 0; i < nt->nt_keyixmax; i++)
1846 if (nt->nt_keyixmap[i] != NULL)
1847 printf("%s: %s[%u] still active\n", __func__,
1848 nt->nt_name, i);
1849#endif
1850 free(nt->nt_keyixmap, M_80211_NODE);
1851 nt->nt_keyixmap = NULL;
1852 }
1853 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt);
1854 IEEE80211_NODE_LOCK_DESTROY(nt);
1855}
1856
1857/*
1858 * Timeout inactive stations and do related housekeeping.
1859 * Note that we cannot hold the node lock while sending a
1860 * frame as this would lead to a LOR. Instead we use a
1861 * generation number to mark nodes that we've scanned and
1862 * drop the lock and restart a scan if we have to time out
1863 * a node. Since we are single-threaded by virtue of
1864 * controlling the inactivity timer we can be sure this will
1865 * process each node only once.
1866 */
1867static void
1868ieee80211_timeout_stations(struct ieee80211com *ic)
1869{
1870 struct ieee80211_node_table *nt = &ic->ic_sta;
1871 struct ieee80211vap *vap;
1872 struct ieee80211_node *ni;
1873 int gen = 0;
1874
1875 IEEE80211_NODE_ITERATE_LOCK(nt);
1876 gen = ++nt->nt_scangen;
1877restart:
1878 IEEE80211_NODE_LOCK(nt);
1879 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
1880 if (ni->ni_scangen == gen) /* previously handled */
1881 continue;
1882 ni->ni_scangen = gen;
1883 /*
1884 * Ignore entries for which have yet to receive an
1885 * authentication frame. These are transient and
1886 * will be reclaimed when the last reference to them
1887 * goes away (when frame xmits complete).
1888 */
1889 vap = ni->ni_vap;
1890 /*
1891 * Only process stations when in RUN state. This
1892 * insures, for example, that we don't timeout an
1893 * inactive station during CAC. Note that CSA state
1894 * is actually handled in ieee80211_node_timeout as
1895 * it applies to more than timeout processing.
1896 */
1897 if (vap->iv_state != IEEE80211_S_RUN)
1898 continue;
1899 /* XXX can vap be NULL? */
1900 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
1901 vap->iv_opmode == IEEE80211_M_STA) &&
1902 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1903 continue;
1904 /*
1905 * Free fragment if not needed anymore
1906 * (last fragment older than 1s).
1907 * XXX doesn't belong here, move to node_age
1908 */
1909 if (ni->ni_rxfrag[0] != NULL &&
1910 ticks > ni->ni_rxfragstamp + hz) {
1911 m_freem(ni->ni_rxfrag[0]);
1912 ni->ni_rxfrag[0] = NULL;
1913 }
1914 if (ni->ni_inact > 0) {
1915 ni->ni_inact--;
1916 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
1917 "%s: inact %u inact_reload %u nrates %u",
1918 __func__, ni->ni_inact, ni->ni_inact_reload,
1919 ni->ni_rates.rs_nrates);
1920 }
1921 /*
1922 * Special case ourself; we may be idle for extended periods
1923 * of time and regardless reclaiming our state is wrong.
1924 * XXX run ic_node_age
1925 */
1926 if (ni == vap->iv_bss)
1927 continue;
1928 if (ni->ni_associd != 0 ||
1929 (vap->iv_opmode == IEEE80211_M_IBSS ||
1930 vap->iv_opmode == IEEE80211_M_AHDEMO)) {
1931 /*
1932 * Age/drain resources held by the station.
1933 */
1934 ic->ic_node_age(ni);
1935 /*
1936 * Probe the station before time it out. We
1937 * send a null data frame which may not be
1938 * universally supported by drivers (need it
1939 * for ps-poll support so it should be...).
1940 *
1941 * XXX don't probe the station unless we've
1942 * received a frame from them (and have
1943 * some idea of the rates they are capable
1944 * of); this will get fixed more properly
1945 * soon with better handling of the rate set.
1946 */
1947 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
1948 (0 < ni->ni_inact &&
1949 ni->ni_inact <= vap->iv_inact_probe) &&
1950 ni->ni_rates.rs_nrates != 0) {
1951 IEEE80211_NOTE(vap,
1952 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
1953 ni, "%s",
1954 "probe station due to inactivity");
1955 /*
1956 * Grab a reference before unlocking the table
1957 * so the node cannot be reclaimed before we
1958 * send the frame. ieee80211_send_nulldata
1959 * understands we've done this and reclaims the
1960 * ref for us as needed.
1961 */
1962 ieee80211_ref_node(ni);
1963 IEEE80211_NODE_UNLOCK(nt);
1964 ieee80211_send_nulldata(ni);
1965 /* XXX stat? */
1966 goto restart;
1967 }
1968 }
1969 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) &&
1970 ni->ni_inact <= 0) {
1971 IEEE80211_NOTE(vap,
1972 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
1973 "station timed out due to inactivity "
1974 "(refcnt %u)", ieee80211_node_refcnt(ni));
1975 /*
1976 * Send a deauthenticate frame and drop the station.
1977 * This is somewhat complicated due to reference counts
1978 * and locking. At this point a station will typically
1979 * have a reference count of 1. ieee80211_node_leave
1980 * will do a "free" of the node which will drop the
1981 * reference count. But in the meantime a reference
1982 * wil be held by the deauth frame. The actual reclaim
1983 * of the node will happen either after the tx is
1984 * completed or by ieee80211_node_leave.
1985 *
1986 * Separately we must drop the node lock before sending
1987 * in case the driver takes a lock, as this can result
1988 * in a LOR between the node lock and the driver lock.
1989 */
1990 ieee80211_ref_node(ni);
1991 IEEE80211_NODE_UNLOCK(nt);
1992 if (ni->ni_associd != 0) {
1993 IEEE80211_SEND_MGMT(ni,
1994 IEEE80211_FC0_SUBTYPE_DEAUTH,
1995 IEEE80211_REASON_AUTH_EXPIRE);
1996 }
1997 ieee80211_node_leave(ni);
1998 ieee80211_free_node(ni);
1999 vap->iv_stats.is_node_timeout++;
2000 goto restart;
2001 }
2002 }
2003 IEEE80211_NODE_UNLOCK(nt);
2004
2005 IEEE80211_NODE_ITERATE_UNLOCK(nt);
2006}
2007
2008/*
2009 * Aggressively reclaim resources. This should be used
2010 * only in a critical situation to reclaim mbuf resources.
2011 */
2012void
2013ieee80211_drain(struct ieee80211com *ic)
2014{
2015 struct ieee80211_node_table *nt = &ic->ic_sta;
2016 struct ieee80211vap *vap;
2017 struct ieee80211_node *ni;
2018
2019 IEEE80211_NODE_LOCK(nt);
2020 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2021 /*
2022 * Ignore entries for which have yet to receive an
2023 * authentication frame. These are transient and
2024 * will be reclaimed when the last reference to them
2025 * goes away (when frame xmits complete).
2026 */
2027 vap = ni->ni_vap;
2028 /*
2029 * Only process stations when in RUN state. This
2030 * insures, for example, that we don't timeout an
2031 * inactive station during CAC. Note that CSA state
2032 * is actually handled in ieee80211_node_timeout as
2033 * it applies to more than timeout processing.
2034 */
2035 if (vap->iv_state != IEEE80211_S_RUN)
2036 continue;
2037 /* XXX can vap be NULL? */
2038 if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
2039 vap->iv_opmode == IEEE80211_M_STA) &&
2040 (ni->ni_flags & IEEE80211_NODE_AREF) == 0)
2041 continue;
2042 /*
2043 * Free fragments.
2044 * XXX doesn't belong here, move to node_drain
2045 */
2046 if (ni->ni_rxfrag[0] != NULL) {
2047 m_freem(ni->ni_rxfrag[0]);
2048 ni->ni_rxfrag[0] = NULL;
2049 }
2050 /*
2051 * Drain resources held by the station.
2052 */
2053 ic->ic_node_drain(ni);
2054 }
2055 IEEE80211_NODE_UNLOCK(nt);
2056}
2057
2058/*
2059 * Per-ieee80211com inactivity timer callback.
2060 */
2061void
2062ieee80211_node_timeout(void *arg)
2063{
2064 struct ieee80211com *ic = arg;
2065
2066 /*
2067 * Defer timeout processing if a channel switch is pending.
2068 * We typically need to be mute so not doing things that
2069 * might generate frames is good to handle in one place.
2070 * Supressing the station timeout processing may extend the
2071 * lifetime of inactive stations (by not decrementing their
2072 * idle counters) but this should be ok unless the CSA is
2073 * active for an unusually long time.
2074 */
2075 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
2076 ieee80211_scan_timeout(ic);
2077 ieee80211_timeout_stations(ic);
2078
2079 IEEE80211_LOCK(ic);
2080 ieee80211_erp_timeout(ic);
2081 ieee80211_ht_timeout(ic);
2082 IEEE80211_UNLOCK(ic);
2083 }
2084 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
2085 ieee80211_node_timeout, ic);
2086}
2087
2088void
2089ieee80211_iterate_nodes(struct ieee80211_node_table *nt,
2090 ieee80211_iter_func *f, void *arg)
2091{
2092 struct ieee80211_node *ni;
2093 u_int gen;
2094
2095 IEEE80211_NODE_ITERATE_LOCK(nt);
2096 gen = ++nt->nt_scangen;
2097restart:
2098 IEEE80211_NODE_LOCK(nt);
2099 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
2100 if (ni->ni_scangen != gen) {
2101 ni->ni_scangen = gen;
2102 (void) ieee80211_ref_node(ni);
2103 IEEE80211_NODE_UNLOCK(nt);
2104 (*f)(arg, ni);
2105 ieee80211_free_node(ni);
2106 goto restart;
2107 }
2108 }
2109 IEEE80211_NODE_UNLOCK(nt);
2110
2111 IEEE80211_NODE_ITERATE_UNLOCK(nt);
2112}
2113
2114void
2115ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
2116{
2117 printf("0x%p: mac %s refcnt %d\n", ni,
2118 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
2119 printf("\tscangen %u authmode %u flags 0x%x\n",
2120 ni->ni_scangen, ni->ni_authmode, ni->ni_flags);
2121 printf("\tassocid 0x%x txpower %u vlan %u\n",
2122 ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
2123 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
2124 ni->ni_txseqs[IEEE80211_NONQOS_TID],
2125 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT,
2126 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK,
2127 ni->ni_rxfragstamp);
2128 printf("\trssi %d noise %d intval %u capinfo 0x%x\n",
2129 node_getrssi(ni), ni->ni_noise,
2130 ni->ni_intval, ni->ni_capinfo);
2131 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n",
2132 ether_sprintf(ni->ni_bssid),
2133 ni->ni_esslen, ni->ni_essid,
2134 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags);
2135 printf("\tinact %u inact_reload %u txrate %u\n",
2136 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate);
2137 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n",
2138 ni->ni_htcap, ni->ni_htparam,
2139 ni->ni_htctlchan, ni->ni_ht2ndchan);
2140 printf("\thtopmode %x htstbc %x chw %u\n",
2141 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw);
2142}
2143
2144void
2145ieee80211_dump_nodes(struct ieee80211_node_table *nt)
2146{
2147 ieee80211_iterate_nodes(nt,
2148 (ieee80211_iter_func *) ieee80211_dump_node, nt);
2149}
2150
2151static void
2152ieee80211_notify_erp_locked(struct ieee80211com *ic)
2153{
2154 struct ieee80211vap *vap;
2155
2156 IEEE80211_LOCK_ASSERT(ic);
2157
2158 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
2159 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2160 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP);
2161}
2162
2163void
2164ieee80211_notify_erp(struct ieee80211com *ic)
2165{
2166 IEEE80211_LOCK(ic);
2167 ieee80211_notify_erp_locked(ic);
2168 IEEE80211_UNLOCK(ic);
2169}
2170
2171/*
2172 * Handle a station joining an 11g network.
2173 */
2174static void
2175ieee80211_node_join_11g(struct ieee80211_node *ni)
2176{
2177 struct ieee80211com *ic = ni->ni_ic;
2178
2179 IEEE80211_LOCK_ASSERT(ic);
2180
2181 /*
2182 * Station isn't capable of short slot time. Bump
2183 * the count of long slot time stations and disable
2184 * use of short slot time. Note that the actual switch
2185 * over to long slot time use may not occur until the
2186 * next beacon transmission (per sec. 7.3.1.4 of 11g).
2187 */
2188 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2189 ic->ic_longslotsta++;
2190 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2191 "station needs long slot time, count %d",
2192 ic->ic_longslotsta);
2193 /* XXX vap's w/ conflicting needs won't work */
2194 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) {
2195 /*
2196 * Don't force slot time when switched to turbo
2197 * mode as non-ERP stations won't be present; this
2198 * need only be done when on the normal G channel.
2199 */
2200 ieee80211_set_shortslottime(ic, 0);
2201 }
2202 }
2203 /*
2204 * If the new station is not an ERP station
2205 * then bump the counter and enable protection
2206 * if configured.
2207 */
2208 if (!ieee80211_iserp_rateset(&ni->ni_rates)) {
2209 ic->ic_nonerpsta++;
2210 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2211 "station is !ERP, %d non-ERP stations associated",
2212 ic->ic_nonerpsta);
2213 /*
2214 * If station does not support short preamble
2215 * then we must enable use of Barker preamble.
2216 */
2217 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
2218 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2219 "%s", "station needs long preamble");
2220 ic->ic_flags |= IEEE80211_F_USEBARKER;
2221 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
2222 }
2223 /*
2224 * If protection is configured and this is the first
2225 * indication we should use protection, enable it.
2226 */
2227 if (ic->ic_protmode != IEEE80211_PROT_NONE &&
2228 ic->ic_nonerpsta == 1 &&
2229 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2230 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2231 "%s: enable use of protection\n", __func__);
2232 ic->ic_flags |= IEEE80211_F_USEPROT;
2233 ieee80211_notify_erp_locked(ic);
2234 }
2235 } else
2236 ni->ni_flags |= IEEE80211_NODE_ERP;
2237}
2238
2239void
2240ieee80211_node_join(struct ieee80211_node *ni, int resp)
2241{
2242 struct ieee80211com *ic = ni->ni_ic;
2243 struct ieee80211vap *vap = ni->ni_vap;
2244 int newassoc;
2245
2246 if (ni->ni_associd == 0) {
2247 uint16_t aid;
2248
2249 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap"));
2250 /*
2251 * It would be good to search the bitmap
2252 * more efficiently, but this will do for now.
2253 */
2254 for (aid = 1; aid < vap->iv_max_aid; aid++) {
2255 if (!IEEE80211_AID_ISSET(vap, aid))
2256 break;
2257 }
2258 if (aid >= vap->iv_max_aid) {
2259 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY);
2260 ieee80211_node_leave(ni);
2261 return;
2262 }
2263 ni->ni_associd = aid | 0xc000;
2264 ni->ni_jointime = time_uptime;
2265 IEEE80211_LOCK(ic);
2266 IEEE80211_AID_SET(vap, ni->ni_associd);
2267 vap->iv_sta_assoc++;
2268 ic->ic_sta_assoc++;
2269
2270 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2271 ieee80211_ht_node_join(ni);
2272 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2273 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2274 ieee80211_node_join_11g(ni);
2275 IEEE80211_UNLOCK(ic);
2276
2277 newassoc = 1;
2278 } else
2279 newassoc = 0;
2280
2281 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2282 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s",
2283 IEEE80211_NODE_AID(ni),
2284 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
2285 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
2286 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "",
2287 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
2288 ni->ni_flags & IEEE80211_NODE_HT ?
2289 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
2290 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
2291 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
2292 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
2293 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
2294 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
2295 ", fast-frames" : "",
2296 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
2297 ", turbo" : ""
2298 );
2299
2300 node_setuptxparms(ni);
2301 /* give driver a chance to setup state like ni_txrate */
2302 if (ic->ic_newassoc != NULL)
2303 ic->ic_newassoc(ni, newassoc);
2304 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS);
2305 /* tell the authenticator about new station */
2306 if (vap->iv_auth->ia_node_join != NULL)
2307 vap->iv_auth->ia_node_join(ni);
2308 ieee80211_notify_node_join(ni,
2309 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
2310}
2311
2312static void
2313disable_protection(struct ieee80211com *ic)
2314{
2315 KASSERT(ic->ic_nonerpsta == 0 &&
2316 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0,
2317 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta,
2318 ic->ic_flags_ext));
2319
2320 ic->ic_flags &= ~IEEE80211_F_USEPROT;
2321 /* XXX verify mode? */
2322 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
2323 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
2324 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
2325 }
2326 ieee80211_notify_erp_locked(ic);
2327}
2328
2329/*
2330 * Handle a station leaving an 11g network.
2331 */
2332static void
2333ieee80211_node_leave_11g(struct ieee80211_node *ni)
2334{
2335 struct ieee80211com *ic = ni->ni_ic;
2336
2337 IEEE80211_LOCK_ASSERT(ic);
2338
2339 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan),
2340 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq,
2341 ic->ic_bsschan->ic_flags));
2342
2343 /*
2344 * If a long slot station do the slot time bookkeeping.
2345 */
2346 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
2347 KASSERT(ic->ic_longslotsta > 0,
2348 ("bogus long slot station count %d", ic->ic_longslotsta));
2349 ic->ic_longslotsta--;
2350 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2351 "long slot time station leaves, count now %d",
2352 ic->ic_longslotsta);
2353 if (ic->ic_longslotsta == 0) {
2354 /*
2355 * Re-enable use of short slot time if supported
2356 * and not operating in IBSS mode (per spec).
2357 */
2358 if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
2359 ic->ic_opmode != IEEE80211_M_IBSS) {
2360 IEEE80211_DPRINTF(ni->ni_vap,
2361 IEEE80211_MSG_ASSOC,
2362 "%s: re-enable use of short slot time\n",
2363 __func__);
2364 ieee80211_set_shortslottime(ic, 1);
2365 }
2366 }
2367 }
2368 /*
2369 * If a non-ERP station do the protection-related bookkeeping.
2370 */
2371 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
2372 KASSERT(ic->ic_nonerpsta > 0,
2373 ("bogus non-ERP station count %d", ic->ic_nonerpsta));
2374 ic->ic_nonerpsta--;
2375 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni,
2376 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta,
2377 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ?
2378 " (non-ERP sta present)" : "");
2379 if (ic->ic_nonerpsta == 0 &&
2380 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
2381 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC,
2382 "%s: disable use of protection\n", __func__);
2383 disable_protection(ic);
2384 }
2385 }
2386}
2387
2388/*
2389 * Time out presence of an overlapping bss with non-ERP
2390 * stations. When operating in hostap mode we listen for
2391 * beacons from other stations and if we identify a non-ERP
2392 * station is present we enable protection. To identify
2393 * when all non-ERP stations are gone we time out this
2394 * condition.
2395 */
2396static void
2397ieee80211_erp_timeout(struct ieee80211com *ic)
2398{
2399
2400 IEEE80211_LOCK_ASSERT(ic);
2401
2402 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) &&
2403 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) {
2404#if 0
2405 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2406 "%s", "age out non-ERP sta present on channel");
2407#endif
2408 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
2409 if (ic->ic_nonerpsta == 0)
2410 disable_protection(ic);
2411 }
2412}
2413
2414/*
2415 * Handle bookkeeping for station deauthentication/disassociation
2416 * when operating as an ap.
2417 */
2418void
2419ieee80211_node_leave(struct ieee80211_node *ni)
2420{
2421 struct ieee80211com *ic = ni->ni_ic;
2422 struct ieee80211vap *vap = ni->ni_vap;
2423 struct ieee80211_node_table *nt = ni->ni_table;
2424
2425 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
2426 "station with aid %d leaves", IEEE80211_NODE_AID(ni));
2427
2428 KASSERT(vap->iv_opmode != IEEE80211_M_STA,
2429 ("unexpected operating mode %u", vap->iv_opmode));
2430 /*
2431 * If node wasn't previously associated all
2432 * we need to do is reclaim the reference.
2433 */
2434 /* XXX ibss mode bypasses 11g and notification */
2435 if (ni->ni_associd == 0)
2436 goto done;
2437 /*
2438 * Tell the authenticator the station is leaving.
2439 * Note that we must do this before yanking the
2440 * association id as the authenticator uses the
2441 * associd to locate it's state block.
2442 */
2443 if (vap->iv_auth->ia_node_leave != NULL)
2444 vap->iv_auth->ia_node_leave(ni);
2445
2446 IEEE80211_LOCK(ic);
2447 IEEE80211_AID_CLR(vap, ni->ni_associd);
2448 ni->ni_associd = 0;
2449 vap->iv_sta_assoc--;
2450 ic->ic_sta_assoc--;
2451
2452 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
2453 ieee80211_ht_node_leave(ni);
2454 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2455 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
2456 ieee80211_node_leave_11g(ni);
2457 IEEE80211_UNLOCK(ic);
2458 /*
2459 * Cleanup station state. In particular clear various
2460 * state that might otherwise be reused if the node
2461 * is reused before the reference count goes to zero
2462 * (and memory is reclaimed).
2463 */
2464 ieee80211_sta_leave(ni);
2465done:
2466 /*
2467 * Remove the node from any table it's recorded in and
2468 * drop the caller's reference. Removal from the table
2469 * is important to insure the node is not reprocessed
2470 * for inactivity.
2471 */
2472 if (nt != NULL) {
2473 IEEE80211_NODE_LOCK(nt);
2474 node_reclaim(nt, ni);
2475 IEEE80211_NODE_UNLOCK(nt);
2476 } else
2477 ieee80211_free_node(ni);
2478}
2479
2480struct rssiinfo {
2481 struct ieee80211vap *vap;
2482 int rssi_samples;
2483 uint32_t rssi_total;
2484};
2485
2486static void
2487get_hostap_rssi(void *arg, struct ieee80211_node *ni)
2488{
2489 struct rssiinfo *info = arg;
2490 struct ieee80211vap *vap = ni->ni_vap;
2491 int8_t rssi;
2492
2493 if (info->vap != vap)
2494 return;
2495 /* only associated stations */
2496 if (ni->ni_associd == 0)
2497 return;
2498 rssi = vap->iv_ic->ic_node_getrssi(ni);
2499 if (rssi != 0) {
2500 info->rssi_samples++;
2501 info->rssi_total += rssi;
2502 }
2503}
2504
2505static void
2506get_adhoc_rssi(void *arg, struct ieee80211_node *ni)
2507{
2508 struct rssiinfo *info = arg;
2509 struct ieee80211vap *vap = ni->ni_vap;
2510 int8_t rssi;
2511
2512 if (info->vap != vap)
2513 return;
2514 /* only neighbors */
2515 /* XXX check bssid */
2516 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
2517 return;
2518 rssi = vap->iv_ic->ic_node_getrssi(ni);
2519 if (rssi != 0) {
2520 info->rssi_samples++;
2521 info->rssi_total += rssi;
2522 }
2523}
2524
2525int8_t
2526ieee80211_getrssi(struct ieee80211vap *vap)
2527{
2528#define NZ(x) ((x) == 0 ? 1 : (x))
2529 struct ieee80211com *ic = vap->iv_ic;
2530 struct rssiinfo info;
2531
2532 info.rssi_total = 0;
2533 info.rssi_samples = 0;
2534 info.vap = vap;
2535 switch (vap->iv_opmode) {
2536 case IEEE80211_M_IBSS: /* average of all ibss neighbors */
2537 case IEEE80211_M_AHDEMO: /* average of all neighbors */
2538 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info);
2539 break;
2540 case IEEE80211_M_HOSTAP: /* average of all associated stations */
2541 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info);
2542 break;
2543 case IEEE80211_M_MONITOR: /* XXX */
2544 case IEEE80211_M_STA: /* use stats from associated ap */
2545 default:
2546 if (vap->iv_bss != NULL)
2547 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss);
2548 info.rssi_samples = 1;
2549 break;
2550 }
2551 return info.rssi_total / NZ(info.rssi_samples);
2552#undef NZ
2553}
2554
2555void
2556ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise)
2557{
2558
2559 if (vap->iv_bss == NULL) /* NB: shouldn't happen */
2560 return;
2561 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise);
2562 /* for non-station mode return avg'd rssi accounting */
2563 if (vap->iv_opmode != IEEE80211_M_STA)
2564 *rssi = ieee80211_getrssi(vap);
2565}
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