2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2007-2009 Sam Leffler, Errno Consulting
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 * IEEE 802.11 IBSS mode support.
34 #include <sys/param.h>
35 #include <sys/systm.h>
37 #include <sys/malloc.h>
38 #include <sys/kernel.h>
40 #include <sys/socket.h>
41 #include <sys/sockio.h>
42 #include <sys/endian.h>
43 #include <sys/errno.h>
45 #include <sys/sysctl.h>
48 #include <net/if_var.h>
49 #include <net/if_media.h>
50 #include <net/if_llc.h>
51 #include <net/if_private.h>
52 #include <net/ethernet.h>
56 #include <net80211/ieee80211_var.h>
57 #include <net80211/ieee80211_adhoc.h>
58 #include <net80211/ieee80211_input.h>
59 #ifdef IEEE80211_SUPPORT_SUPERG
60 #include <net80211/ieee80211_superg.h>
62 #ifdef IEEE80211_SUPPORT_TDMA
63 #include <net80211/ieee80211_tdma.h>
65 #include <net80211/ieee80211_sta.h>
67 #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2)
69 static void adhoc_vattach(struct ieee80211vap *);
70 static int adhoc_newstate(struct ieee80211vap *, enum ieee80211_state, int);
71 static int adhoc_input(struct ieee80211_node *, struct mbuf *,
72 const struct ieee80211_rx_stats *, int, int);
73 static void adhoc_recv_mgmt(struct ieee80211_node *, struct mbuf *,
74 int subtype, const struct ieee80211_rx_stats *, int, int);
75 static void ahdemo_recv_mgmt(struct ieee80211_node *, struct mbuf *,
76 int subtype, const struct ieee80211_rx_stats *rxs, int, int);
77 static void adhoc_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype);
80 ieee80211_adhoc_attach(struct ieee80211com *ic)
82 ic->ic_vattach[IEEE80211_M_IBSS] = adhoc_vattach;
83 ic->ic_vattach[IEEE80211_M_AHDEMO] = adhoc_vattach;
87 ieee80211_adhoc_detach(struct ieee80211com *ic)
92 adhoc_vdetach(struct ieee80211vap *vap)
97 adhoc_vattach(struct ieee80211vap *vap)
99 vap->iv_newstate = adhoc_newstate;
100 vap->iv_input = adhoc_input;
101 if (vap->iv_opmode == IEEE80211_M_IBSS)
102 vap->iv_recv_mgmt = adhoc_recv_mgmt;
104 vap->iv_recv_mgmt = ahdemo_recv_mgmt;
105 vap->iv_recv_ctl = adhoc_recv_ctl;
106 vap->iv_opdetach = adhoc_vdetach;
107 #ifdef IEEE80211_SUPPORT_TDMA
109 * Throw control to tdma support. Note we do this
110 * after setting up our callbacks so it can piggyback
113 if (vap->iv_caps & IEEE80211_C_TDMA)
114 ieee80211_tdma_vattach(vap);
119 sta_leave(void *arg, struct ieee80211_node *ni)
121 struct ieee80211vap *vap = ni->ni_vap;
123 if (ni != vap->iv_bss)
124 ieee80211_node_leave(ni);
128 * IEEE80211_M_IBSS+IEEE80211_M_AHDEMO vap state machine handler.
131 adhoc_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
133 struct ieee80211com *ic = vap->iv_ic;
134 struct ieee80211_node *ni;
135 enum ieee80211_state ostate;
137 IEEE80211_LOCK_ASSERT(vap->iv_ic);
139 ostate = vap->iv_state;
140 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
141 __func__, ieee80211_state_name[ostate],
142 ieee80211_state_name[nstate], arg);
143 vap->iv_state = nstate; /* state transition */
144 if (ostate != IEEE80211_S_SCAN)
145 ieee80211_cancel_scan(vap); /* background scan */
146 ni = vap->iv_bss; /* NB: no reference held */
148 case IEEE80211_S_INIT:
150 case IEEE80211_S_SCAN:
151 ieee80211_cancel_scan(vap);
156 if (ostate != IEEE80211_S_INIT) {
157 /* NB: optimize INIT -> INIT case */
158 ieee80211_reset_bss(vap);
161 case IEEE80211_S_SCAN:
163 case IEEE80211_S_RUN: /* beacon miss */
164 /* purge station table; entries are stale */
165 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap,
168 case IEEE80211_S_INIT:
169 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
170 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) {
172 * Already have a channel; bypass the
173 * scan and startup immediately.
175 ieee80211_create_ibss(vap,
176 ieee80211_ht_adjust_channel(ic,
177 vap->iv_des_chan, vap->iv_flags_ht));
181 * Initiate a scan. We can come here as a result
182 * of an IEEE80211_IOC_SCAN_REQ too in which case
183 * the vap will be marked with IEEE80211_FEXT_SCANREQ
184 * and the scan request parameters will be present
185 * in iv_scanreq. Otherwise we do the default.
187 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
188 ieee80211_check_scan(vap,
189 vap->iv_scanreq_flags,
190 vap->iv_scanreq_duration,
191 vap->iv_scanreq_mindwell,
192 vap->iv_scanreq_maxdwell,
193 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
194 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
196 ieee80211_check_scan_current(vap);
198 case IEEE80211_S_SCAN:
200 * This can happen because of a change in state
201 * that requires a reset. Trigger a new scan
202 * unless we're in manual roaming mode in which
203 * case an application must issue an explicit request.
205 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO)
206 ieee80211_check_scan_current(vap);
212 case IEEE80211_S_RUN:
213 if (vap->iv_flags & IEEE80211_F_WPA) {
214 /* XXX validate prerequisites */
217 case IEEE80211_S_INIT:
219 * Already have a channel; bypass the
220 * scan and startup immediately.
221 * Note that ieee80211_create_ibss will call
222 * back to do a RUN->RUN state change.
224 ieee80211_create_ibss(vap,
225 ieee80211_ht_adjust_channel(ic,
226 ic->ic_curchan, vap->iv_flags_ht));
227 /* NB: iv_bss is changed on return */
230 case IEEE80211_S_SCAN:
231 #ifdef IEEE80211_DEBUG
232 if (ieee80211_msg_debug(vap)) {
234 "synchronized with %s ssid ",
235 ether_sprintf(ni->ni_bssid));
236 ieee80211_print_essid(vap->iv_bss->ni_essid,
239 printf(" channel %d start %uMb\n",
240 ieee80211_chan2ieee(ic, ic->ic_curchan),
241 IEEE80211_RATE2MBS(ni->ni_txrate));
245 case IEEE80211_S_RUN: /* IBSS merge */
251 * When 802.1x is not in use mark the port authorized
252 * at this point so traffic can flow.
254 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
255 ieee80211_node_authorize(ni);
257 * Fake association when joining an existing bss.
259 if (!IEEE80211_ADDR_EQ(ni->ni_macaddr, vap->iv_myaddr) &&
260 ic->ic_newassoc != NULL)
261 ic->ic_newassoc(ni, ostate != IEEE80211_S_RUN);
263 case IEEE80211_S_SLEEP:
264 vap->iv_sta_ps(vap, 0);
268 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
269 "%s: unexpected state transition %s -> %s\n", __func__,
270 ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
277 * Decide if a received management frame should be
278 * printed when debugging is enabled. This filters some
279 * of the less interesting frames that come frequently
283 doprint(struct ieee80211vap *vap, int subtype)
286 case IEEE80211_FC0_SUBTYPE_BEACON:
287 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN);
288 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
295 * Process a received frame. The node associated with the sender
296 * should be supplied. If nothing was found in the node table then
297 * the caller is assumed to supply a reference to iv_bss instead.
298 * The RSSI and a timestamp are also supplied. The RSSI data is used
299 * during AP scanning to select a AP to associate with; it can have
300 * any units so long as values have consistent units and higher values
301 * mean ``better signal''. The receive timestamp is currently not used
302 * by the 802.11 layer.
305 adhoc_input(struct ieee80211_node *ni, struct mbuf *m,
306 const struct ieee80211_rx_stats *rxs, int rssi, int nf)
308 struct ieee80211vap *vap = ni->ni_vap;
309 struct ieee80211com *ic = ni->ni_ic;
310 struct ifnet *ifp = vap->iv_ifp;
311 struct ieee80211_frame *wh;
312 struct ieee80211_key *key;
313 struct ether_header *eh;
314 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */
315 uint8_t dir, type, subtype, qos;
317 int is_hw_decrypted = 0;
318 int has_decrypted = 0;
321 * Some devices do hardware decryption all the way through
322 * to pretending the frame wasn't encrypted in the first place.
323 * So, tag it appropriately so it isn't discarded inappropriately.
325 if ((rxs != NULL) && (rxs->c_pktflags & IEEE80211_RX_F_DECRYPTED))
328 if (m->m_flags & M_AMPDU_MPDU) {
330 * Fastpath for A-MPDU reorder q resubmission. Frames
331 * w/ M_AMPDU_MPDU marked have already passed through
332 * here but were received out of order and been held on
333 * the reorder queue. When resubmitted they are marked
334 * with the M_AMPDU_MPDU flag and we can bypass most of
335 * the normal processing.
337 wh = mtod(m, struct ieee80211_frame *);
338 type = IEEE80211_FC0_TYPE_DATA;
339 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
340 subtype = IEEE80211_FC0_SUBTYPE_QOS_DATA;
341 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */
345 KASSERT(ni != NULL, ("null node"));
346 ni->ni_inact = ni->ni_inact_reload;
348 type = -1; /* undefined */
350 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
351 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
352 ni->ni_macaddr, NULL,
353 "too short (1): len %u", m->m_pkthdr.len);
354 vap->iv_stats.is_rx_tooshort++;
358 * Bit of a cheat here, we use a pointer for a 3-address
359 * frame format but don't reference fields past outside
360 * ieee80211_frame_min w/o first validating the data is
363 wh = mtod(m, struct ieee80211_frame *);
365 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
366 IEEE80211_FC0_VERSION_0) {
367 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
368 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
369 wh->i_fc[0], wh->i_fc[1]);
370 vap->iv_stats.is_rx_badversion++;
374 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
375 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
376 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
377 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
378 if (dir != IEEE80211_FC1_DIR_NODS)
380 else if (type == IEEE80211_FC0_TYPE_CTL)
383 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
384 IEEE80211_DISCARD_MAC(vap,
385 IEEE80211_MSG_ANY, ni->ni_macaddr,
386 NULL, "too short (2): len %u",
388 vap->iv_stats.is_rx_tooshort++;
394 * Validate the bssid.
396 if (!(type == IEEE80211_FC0_TYPE_MGT &&
397 (subtype == IEEE80211_FC0_SUBTYPE_BEACON ||
398 subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP)) &&
399 !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) &&
400 !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) {
401 /* not interested in */
402 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
403 bssid, NULL, "%s", "not to bss");
404 vap->iv_stats.is_rx_wrongbss++;
408 * Data frame, cons up a node when it doesn't
409 * exist. This should probably done after an ACL check.
411 if (type == IEEE80211_FC0_TYPE_DATA &&
413 !IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
415 * Beware of frames that come in too early; we
416 * can receive broadcast frames and creating sta
417 * entries will blow up because there is no bss
420 if (vap->iv_state != IEEE80211_S_RUN) {
421 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
422 wh, "data", "not in RUN state (%s)",
423 ieee80211_state_name[vap->iv_state]);
424 vap->iv_stats.is_rx_badstate++;
428 * Fake up a node for this newly discovered member
431 * Note: This doesn't "upgrade" the node to 11n;
432 * that will happen after a probe request/response
435 ni = ieee80211_fakeup_adhoc_node(vap, wh->i_addr2);
437 /* NB: stat kept for alloc failure */
441 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
443 if (IEEE80211_HAS_SEQ(type, subtype) &&
444 IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
445 uint8_t tid = ieee80211_gettid(wh);
446 if (IEEE80211_QOS_HAS_SEQ(wh) &&
447 TID_TO_WME_AC(tid) >= WME_AC_VI)
448 ic->ic_wme.wme_hipri_traffic++;
449 if (! ieee80211_check_rxseq(ni, wh, bssid, rxs))
455 case IEEE80211_FC0_TYPE_DATA:
456 hdrspace = ieee80211_hdrspace(ic, wh);
457 if (m->m_len < hdrspace &&
458 (m = m_pullup(m, hdrspace)) == NULL) {
459 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
460 ni->ni_macaddr, NULL,
461 "data too short: expecting %u", hdrspace);
462 vap->iv_stats.is_rx_tooshort++;
465 if (dir != IEEE80211_FC1_DIR_NODS) {
466 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
467 wh, "data", "incorrect dir 0x%x", dir);
468 vap->iv_stats.is_rx_wrongdir++;
471 /* XXX no power-save support */
474 * Handle A-MPDU re-ordering. If the frame is to be
475 * processed directly then ieee80211_ampdu_reorder
476 * will return 0; otherwise it has consumed the mbuf
477 * and we should do nothing more with it.
479 if ((m->m_flags & M_AMPDU) &&
480 ieee80211_ampdu_reorder(ni, m, rxs) != 0) {
487 * Handle privacy requirements. Note that we
488 * must not be preempted from here until after
489 * we (potentially) call ieee80211_crypto_demic;
490 * otherwise we may violate assumptions in the
491 * crypto cipher modules used to do delayed update
492 * of replay sequence numbers.
494 if (is_hw_decrypted || IEEE80211_IS_PROTECTED(wh)) {
495 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
497 * Discard encrypted frames when privacy is off.
499 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
500 wh, "WEP", "%s", "PRIVACY off");
501 vap->iv_stats.is_rx_noprivacy++;
502 IEEE80211_NODE_STAT(ni, rx_noprivacy);
505 if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) {
506 /* NB: stats+msgs handled in crypto_decap */
507 IEEE80211_NODE_STAT(ni, rx_wepfail);
510 wh = mtod(m, struct ieee80211_frame *);
511 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
514 /* XXX M_WEP and IEEE80211_F_PRIVACY */
519 * Save QoS bits for use below--before we strip the header.
521 if (subtype == IEEE80211_FC0_SUBTYPE_QOS_DATA)
522 qos = ieee80211_getqos(wh)[0];
527 * Next up, any fragmentation.
529 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
530 m = ieee80211_defrag(ni, m, hdrspace, has_decrypted);
532 /* Fragment dropped or frame not complete yet */
536 wh = NULL; /* no longer valid, catch any uses */
539 * Next strip any MSDU crypto bits.
541 if (!ieee80211_crypto_demic(vap, key, m, 0)) {
542 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
543 ni->ni_macaddr, "data", "%s", "demic error");
544 vap->iv_stats.is_rx_demicfail++;
545 IEEE80211_NODE_STAT(ni, rx_demicfail);
549 /* copy to listener after decrypt */
550 if (ieee80211_radiotap_active_vap(vap))
551 ieee80211_radiotap_rx(vap, m);
555 * Finally, strip the 802.11 header.
557 m = ieee80211_decap(vap, m, hdrspace, qos);
559 /* XXX mask bit to check for both */
560 /* don't count Null data frames as errors */
561 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
562 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
564 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
565 ni->ni_macaddr, "data", "%s", "decap error");
566 vap->iv_stats.is_rx_decap++;
567 IEEE80211_NODE_STAT(ni, rx_decap);
570 if (!(qos & IEEE80211_QOS_AMSDU))
571 eh = mtod(m, struct ether_header *);
574 if (!ieee80211_node_is_authorized(ni)) {
576 * Deny any non-PAE frames received prior to
577 * authorization. For open/shared-key
578 * authentication the port is mark authorized
579 * after authentication completes. For 802.1x
580 * the port is not marked authorized by the
581 * authenticator until the handshake has completed.
584 eh->ether_type != htons(ETHERTYPE_PAE)) {
585 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
586 ni->ni_macaddr, "data", "unauthorized or "
587 "unknown port: ether type 0x%x len %u",
588 eh == NULL ? -1 : eh->ether_type,
590 vap->iv_stats.is_rx_unauth++;
591 IEEE80211_NODE_STAT(ni, rx_unauth);
596 * When denying unencrypted frames, discard
597 * any non-PAE frames received without encryption.
599 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
600 ((has_decrypted == 0) && (m->m_flags & M_WEP) == 0) &&
601 (is_hw_decrypted == 0) &&
603 eh->ether_type != htons(ETHERTYPE_PAE))) {
605 * Drop unencrypted frames.
607 vap->iv_stats.is_rx_unencrypted++;
608 IEEE80211_NODE_STAT(ni, rx_unencrypted);
612 /* XXX require HT? */
613 if (qos & IEEE80211_QOS_AMSDU) {
614 m = ieee80211_decap_amsdu(ni, m);
616 return IEEE80211_FC0_TYPE_DATA;
618 #ifdef IEEE80211_SUPPORT_SUPERG
619 m = ieee80211_decap_fastframe(vap, ni, m);
621 return IEEE80211_FC0_TYPE_DATA;
624 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL)
625 ieee80211_deliver_data(ni->ni_wdsvap, ni, m);
627 ieee80211_deliver_data(vap, ni, m);
628 return IEEE80211_FC0_TYPE_DATA;
630 case IEEE80211_FC0_TYPE_MGT:
631 vap->iv_stats.is_rx_mgmt++;
632 IEEE80211_NODE_STAT(ni, rx_mgmt);
633 if (dir != IEEE80211_FC1_DIR_NODS) {
634 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
635 wh, "data", "incorrect dir 0x%x", dir);
636 vap->iv_stats.is_rx_wrongdir++;
639 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
640 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
641 ni->ni_macaddr, "mgt", "too short: len %u",
643 vap->iv_stats.is_rx_tooshort++;
646 #ifdef IEEE80211_DEBUG
647 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) ||
648 ieee80211_msg_dumppkts(vap)) {
649 if_printf(ifp, "received %s from %s rssi %d\n",
650 ieee80211_mgt_subtype_name(subtype),
651 ether_sprintf(wh->i_addr2), rssi);
654 if (IEEE80211_IS_PROTECTED(wh)) {
655 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
656 wh, NULL, "%s", "WEP set but not permitted");
657 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
660 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
663 case IEEE80211_FC0_TYPE_CTL:
664 vap->iv_stats.is_rx_ctl++;
665 IEEE80211_NODE_STAT(ni, rx_ctrl);
666 vap->iv_recv_ctl(ni, m, subtype);
670 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
671 wh, "bad", "frame type 0x%x", type);
672 /* should not come here */
676 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
679 if (need_tap && ieee80211_radiotap_active_vap(vap))
680 ieee80211_radiotap_rx(vap, m);
687 is11bclient(const uint8_t *rates, const uint8_t *xrates)
689 static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11);
692 /* NB: the 11b clients we care about will not have xrates */
693 if (xrates != NULL || rates == NULL)
695 for (i = 0; i < rates[1]; i++) {
696 int r = rates[2+i] & IEEE80211_RATE_VAL;
697 if (r > 2*11 || ((1<<r) & brates) == 0)
704 adhoc_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
705 int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf)
707 struct ieee80211vap *vap = ni->ni_vap;
708 struct ieee80211com *ic = ni->ni_ic;
709 struct ieee80211_channel *rxchan = ic->ic_curchan;
710 struct ieee80211_frame *wh;
712 uint8_t *ssid, *rates, *xrates;
714 int ht_state_change = 0;
717 wh = mtod(m0, struct ieee80211_frame *);
718 frm = (uint8_t *)&wh[1];
719 efrm = mtod(m0, uint8_t *) + m0->m_len;
721 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INPUT | IEEE80211_MSG_DEBUG,
722 "%s: recv mgmt frame, addr2=%6D, ni=%p (%6D) fc=%.02x %.02x\n",
730 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
731 case IEEE80211_FC0_SUBTYPE_BEACON: {
732 struct ieee80211_scanparams scan;
733 struct ieee80211_channel *c;
735 * We process beacon/probe response
736 * frames to discover neighbors.
739 c = ieee80211_lookup_channel_rxstatus(vap, rxs);
743 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0)
746 * Count frame now that we know it's to be processed.
748 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
749 vap->iv_stats.is_rx_beacon++; /* XXX remove */
750 IEEE80211_NODE_STAT(ni, rx_beacons);
752 IEEE80211_NODE_STAT(ni, rx_proberesp);
754 * If scanning, just pass information to the scan module.
756 if (ic->ic_flags & IEEE80211_F_SCAN) {
757 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
759 * Actively scanning a channel marked passive;
760 * send a probe request now that we know there
761 * is 802.11 traffic present.
763 * XXX check if the beacon we recv'd gives
764 * us what we need and suppress the probe req
766 ieee80211_probe_curchan(vap, 1);
767 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
769 ieee80211_add_scan(vap, rxchan, &scan, wh,
773 if (scan.capinfo & IEEE80211_CAPINFO_IBSS) {
774 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
776 * Create a new entry in the neighbor table.
780 * Here we're not scanning; so if we have an
781 * SSID then make sure it matches our SSID.
782 * Otherwise this code will match on all IBSS
783 * beacons/probe requests for all SSIDs,
784 * filling the node table with nodes that
787 if (ieee80211_ibss_node_check_new(ni, &scan)) {
788 ni = ieee80211_add_neighbor(vap, wh, &scan);
790 * Send a probe request so we announce 11n
793 ieee80211_send_probereq(ni, /* node */
794 vap->iv_myaddr, /* SA */
795 ni->ni_macaddr, /* DA */
796 vap->iv_bss->ni_bssid, /* BSSID */
797 vap->iv_bss->ni_essid,
798 vap->iv_bss->ni_esslen); /* SSID */
803 * Send a probe request so we announce 11n
806 * Don't do this if we're scanning.
808 if (! (ic->ic_flags & IEEE80211_F_SCAN))
809 ieee80211_send_probereq(ni, /* node */
810 vap->iv_myaddr, /* SA */
811 ni->ni_macaddr, /* DA */
812 vap->iv_bss->ni_bssid, /* BSSID */
813 vap->iv_bss->ni_essid,
814 vap->iv_bss->ni_esslen); /* SSID */
816 } else if (ni->ni_capinfo == 0) {
818 * Update faked node created on transmit.
819 * Note this also updates the tsf.
821 ieee80211_init_neighbor(ni, wh, &scan);
824 * Send a probe request so we announce 11n
827 ieee80211_send_probereq(ni, /* node */
828 vap->iv_myaddr, /* SA */
829 ni->ni_macaddr, /* DA */
830 vap->iv_bss->ni_bssid, /* BSSID */
831 vap->iv_bss->ni_essid,
832 vap->iv_bss->ni_esslen); /* SSID */
835 * Record tsf for potential resync.
837 memcpy(ni->ni_tstamp.data, scan.tstamp,
838 sizeof(ni->ni_tstamp));
841 * This isn't enabled yet - otherwise it would
842 * update the HT parameters and channel width
843 * from any node, which could lead to lots of
844 * strange behaviour if the 11n nodes aren't
845 * exactly configured to match.
848 if (scan.htcap != NULL && scan.htinfo != NULL &&
849 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
850 ieee80211_ht_updateparams(ni,
851 scan.htcap, scan.htinfo));
852 if (ieee80211_ht_updateparams_final(ni,
853 scan.htcap, scan.htinfo))
857 /* XXX same for VHT? */
860 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
864 * Same here - the channel width change should
865 * be applied to the specific peer node, not
866 * to the ic. Ie, the interface configuration
867 * should stay in its current channel width;
868 * but it should change the rate control and
869 * any queued frames for the given node only.
871 * Since there's no (current) way to inform
872 * the driver that a channel width change has
873 * occurred for a single node, just stub this
878 ieee80211_update_chw(ic);
884 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
885 if (vap->iv_state != IEEE80211_S_RUN) {
886 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
887 wh, NULL, "wrong state %s",
888 ieee80211_state_name[vap->iv_state]);
889 vap->iv_stats.is_rx_mgtdiscard++;
892 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
893 /* frame must be directed */
894 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
895 wh, NULL, "%s", "not unicast");
896 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */
903 * [tlv] supported rates
904 * [tlv] extended supported rates
906 ssid = rates = xrates = NULL;
907 while (efrm - frm > 1) {
908 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
910 case IEEE80211_ELEMID_SSID:
913 case IEEE80211_ELEMID_RATES:
916 case IEEE80211_ELEMID_XRATES:
922 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
924 IEEE80211_VERIFY_ELEMENT(xrates,
925 IEEE80211_RATE_MAXSIZE - rates[1], return);
926 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
927 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
928 if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) {
929 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
931 "%s", "no ssid with ssid suppression enabled");
932 vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/
936 /* XXX find a better class or define it's own */
937 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
938 "%s", "recv probe req");
940 * Some legacy 11b clients cannot hack a complete
941 * probe response frame. When the request includes
942 * only a bare-bones rate set, communicate this to
945 ieee80211_send_proberesp(vap, wh->i_addr2,
946 is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0);
949 * Note: we don't benefit from stashing the probe request
950 * IEs away to use for IBSS negotiation, because we
951 * typically don't get all of the IEs.
955 case IEEE80211_FC0_SUBTYPE_ACTION:
956 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
957 if ((ni == vap->iv_bss) &&
958 !IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
959 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
960 wh, NULL, "%s", "unknown node");
961 vap->iv_stats.is_rx_mgtdiscard++;
962 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
963 !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
964 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT | IEEE80211_MSG_DEBUG,
965 wh, NULL, "%s", "not for us");
966 vap->iv_stats.is_rx_mgtdiscard++;
967 } else if (vap->iv_state != IEEE80211_S_RUN) {
968 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT | IEEE80211_MSG_DEBUG,
969 wh, NULL, "wrong state %s",
970 ieee80211_state_name[vap->iv_state]);
971 vap->iv_stats.is_rx_mgtdiscard++;
973 if (ieee80211_parse_action(ni, m0) == 0)
974 (void)ic->ic_recv_action(ni, wh, frm, efrm);
978 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
979 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
980 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
981 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
982 case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
983 case IEEE80211_FC0_SUBTYPE_ATIM:
984 case IEEE80211_FC0_SUBTYPE_DISASSOC:
985 case IEEE80211_FC0_SUBTYPE_AUTH:
986 case IEEE80211_FC0_SUBTYPE_DEAUTH:
987 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
988 wh, NULL, "%s", "not handled");
989 vap->iv_stats.is_rx_mgtdiscard++;
993 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
994 wh, "mgt", "subtype 0x%x not handled", subtype);
995 vap->iv_stats.is_rx_badsubtype++;
999 #undef IEEE80211_VERIFY_LENGTH
1000 #undef IEEE80211_VERIFY_ELEMENT
1003 ahdemo_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
1004 int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1006 struct ieee80211vap *vap = ni->ni_vap;
1007 struct ieee80211com *ic = ni->ni_ic;
1010 * Process management frames when scanning; useful for doing
1013 if (ic->ic_flags & IEEE80211_F_SCAN)
1014 adhoc_recv_mgmt(ni, m0, subtype, rxs, rssi, nf);
1016 #ifdef IEEE80211_DEBUG
1017 struct ieee80211_frame *wh;
1019 wh = mtod(m0, struct ieee80211_frame *);
1022 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1023 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
1024 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
1025 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
1026 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1027 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1028 case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
1029 case IEEE80211_FC0_SUBTYPE_BEACON:
1030 case IEEE80211_FC0_SUBTYPE_ATIM:
1031 case IEEE80211_FC0_SUBTYPE_DISASSOC:
1032 case IEEE80211_FC0_SUBTYPE_AUTH:
1033 case IEEE80211_FC0_SUBTYPE_DEAUTH:
1034 case IEEE80211_FC0_SUBTYPE_ACTION:
1035 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
1036 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1037 wh, NULL, "%s", "not handled");
1038 vap->iv_stats.is_rx_mgtdiscard++;
1041 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1042 wh, "mgt", "subtype 0x%x not handled", subtype);
1043 vap->iv_stats.is_rx_badsubtype++;
1050 adhoc_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
1054 case IEEE80211_FC0_SUBTYPE_BAR:
1055 ieee80211_recv_bar(ni, m);