1 /* $OpenBSD: ieee80211_proto.c,v 1.109 2024/02/08 00:05:46 jsg Exp $ */
2 /* $NetBSD: ieee80211_proto.c,v 1.8 2004/04/30 23:58:20 dyoung Exp $ */
3
4 /*-
5 * Copyright (c) 2001 Atsushi Onoe
6 * Copyright (c) 2002, 2003 Sam Leffler, Errno Consulting
7 * Copyright (c) 2008, 2009 Damien Bergamini
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * IEEE 802.11 protocol support.
35 */
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/mbuf.h>
40 #include <sys/kernel.h>
41 #include <sys/socket.h>
42 #include <sys/sockio.h>
43 #include <sys/endian.h>
44 #include <sys/errno.h>
45 #include <sys/sysctl.h>
46 #ifdef __HAIKU__
47 #include <sys/task.h>
48 #endif
49
50 #include <net/if.h>
51 #include <net/if_dl.h>
52 #include <net/if_media.h>
53 #include <net/if_llc.h>
54 #include <net/route.h>
55
56 #include <netinet/in.h>
57 #include <netinet/if_ether.h>
58
59 #include <net80211/ieee80211_var.h>
60 #include <net80211/ieee80211_priv.h>
61
62 const char * const ieee80211_mgt_subtype_name[] = {
63 "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp",
64 "probe_req", "probe_resp", "reserved#6", "reserved#7",
65 "beacon", "atim", "disassoc", "auth",
66 "deauth", "action", "action_noack", "reserved#15"
67 };
68 const char * const ieee80211_state_name[IEEE80211_S_MAX] = {
69 "INIT", /* IEEE80211_S_INIT */
70 "SCAN", /* IEEE80211_S_SCAN */
71 "AUTH", /* IEEE80211_S_AUTH */
72 "ASSOC", /* IEEE80211_S_ASSOC */
73 "RUN" /* IEEE80211_S_RUN */
74 };
75 const char * const ieee80211_phymode_name[] = {
76 "auto", /* IEEE80211_MODE_AUTO */
77 "11a", /* IEEE80211_MODE_11A */
78 "11b", /* IEEE80211_MODE_11B */
79 "11g", /* IEEE80211_MODE_11G */
80 "11n", /* IEEE80211_MODE_11N */
81 "11ac", /* IEEE80211_MODE_11AC */
82 };
83
84 void ieee80211_set_beacon_miss_threshold(struct ieee80211com *);
85 int ieee80211_newstate(struct ieee80211com *, enum ieee80211_state, int);
86
87 void
ieee80211_proto_attach(struct ifnet * ifp)88 ieee80211_proto_attach(struct ifnet *ifp)
89 {
90 struct ieee80211com *ic = (void *)ifp;
91
92 mq_init(&ic->ic_mgtq, IFQ_MAXLEN, IPL_NET);
93 mq_init(&ic->ic_pwrsaveq, IFQ_MAXLEN, IPL_NET);
94
95 ifp->if_hdrlen = sizeof(struct ieee80211_frame);
96
97 ic->ic_rtsthreshold = IEEE80211_RTS_MAX;
98 ic->ic_fragthreshold = 2346; /* XXX not used yet */
99 ic->ic_fixed_rate = -1; /* no fixed rate */
100 ic->ic_fixed_mcs = -1; /* no fixed mcs */
101 ic->ic_protmode = IEEE80211_PROT_CTSONLY;
102
103 /* protocol state change handler */
104 ic->ic_newstate = ieee80211_newstate;
105
106 /* initialize management frame handlers */
107 ic->ic_recv_mgmt = ieee80211_recv_mgmt;
108 ic->ic_send_mgmt = ieee80211_send_mgmt;
109 }
110
111 void
ieee80211_proto_detach(struct ifnet * ifp)112 ieee80211_proto_detach(struct ifnet *ifp)
113 {
114 struct ieee80211com *ic = (void *)ifp;
115
116 mq_purge(&ic->ic_mgtq);
117 mq_purge(&ic->ic_pwrsaveq);
118 }
119
120 void
ieee80211_print_essid(const u_int8_t * essid,int len)121 ieee80211_print_essid(const u_int8_t *essid, int len)
122 {
123 int i;
124 const u_int8_t *p;
125
126 if (len > IEEE80211_NWID_LEN)
127 len = IEEE80211_NWID_LEN;
128 /* determine printable or not */
129 for (i = 0, p = essid; i < len; i++, p++) {
130 if (*p < ' ' || *p > 0x7e)
131 break;
132 }
133 if (i == len) {
134 printf("\"");
135 for (i = 0, p = essid; i < len; i++, p++)
136 printf("%c", *p);
137 printf("\"");
138 } else {
139 printf("0x");
140 for (i = 0, p = essid; i < len; i++, p++)
141 printf("%02x", *p);
142 }
143 }
144
145 #ifdef IEEE80211_DEBUG
146 void
ieee80211_dump_pkt(const u_int8_t * buf,int len,int rate,int rssi)147 ieee80211_dump_pkt(const u_int8_t *buf, int len, int rate, int rssi)
148 {
149 struct ieee80211_frame *wh;
150 int i;
151
152 wh = (struct ieee80211_frame *)buf;
153 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
154 case IEEE80211_FC1_DIR_NODS:
155 printf("NODS %s", ether_sprintf(wh->i_addr2));
156 printf("->%s", ether_sprintf(wh->i_addr1));
157 printf("(%s)", ether_sprintf(wh->i_addr3));
158 break;
159 case IEEE80211_FC1_DIR_TODS:
160 printf("TODS %s", ether_sprintf(wh->i_addr2));
161 printf("->%s", ether_sprintf(wh->i_addr3));
162 printf("(%s)", ether_sprintf(wh->i_addr1));
163 break;
164 case IEEE80211_FC1_DIR_FROMDS:
165 printf("FRDS %s", ether_sprintf(wh->i_addr3));
166 printf("->%s", ether_sprintf(wh->i_addr1));
167 printf("(%s)", ether_sprintf(wh->i_addr2));
168 break;
169 case IEEE80211_FC1_DIR_DSTODS:
170 printf("DSDS %s", ether_sprintf((u_int8_t *)&wh[1]));
171 printf("->%s", ether_sprintf(wh->i_addr3));
172 printf("(%s", ether_sprintf(wh->i_addr2));
173 printf("->%s)", ether_sprintf(wh->i_addr1));
174 break;
175 }
176 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
177 case IEEE80211_FC0_TYPE_DATA:
178 printf(" data");
179 break;
180 case IEEE80211_FC0_TYPE_MGT:
181 printf(" %s", ieee80211_mgt_subtype_name[
182 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
183 >> IEEE80211_FC0_SUBTYPE_SHIFT]);
184 break;
185 default:
186 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK);
187 break;
188 }
189 if (wh->i_fc[1] & IEEE80211_FC1_WEP)
190 printf(" WEP");
191 if (rate >= 0)
192 printf(" %d%sM", rate / 2, (rate & 1) ? ".5" : "");
193 if (rssi >= 0)
194 printf(" +%d", rssi);
195 printf("\n");
196 if (len > 0) {
197 for (i = 0; i < len; i++) {
198 if ((i & 1) == 0)
199 printf(" ");
200 printf("%02x", buf[i]);
201 }
202 printf("\n");
203 }
204 }
205 #endif
206
207 int
ieee80211_fix_rate(struct ieee80211com * ic,struct ieee80211_node * ni,int flags)208 ieee80211_fix_rate(struct ieee80211com *ic, struct ieee80211_node *ni,
209 int flags)
210 {
211 #define RV(v) ((v) & IEEE80211_RATE_VAL)
212 int i, j, ignore, error;
213 int okrate, badrate, fixedrate;
214 const struct ieee80211_rateset *srs;
215 struct ieee80211_rateset *nrs;
216 u_int8_t r;
217
218 /*
219 * If the fixed rate check was requested but no fixed rate has been
220 * defined then just remove the check.
221 */
222 if ((flags & IEEE80211_F_DOFRATE) && ic->ic_fixed_rate == -1)
223 flags &= ~IEEE80211_F_DOFRATE;
224
225 error = 0;
226 okrate = badrate = fixedrate = 0;
227 srs = &ic->ic_sup_rates[ieee80211_chan2mode(ic, ni->ni_chan)];
228 nrs = &ni->ni_rates;
229 for (i = 0; i < nrs->rs_nrates; ) {
230 ignore = 0;
231 if (flags & IEEE80211_F_DOSORT) {
232 /*
233 * Sort rates.
234 */
235 for (j = i + 1; j < nrs->rs_nrates; j++) {
236 if (RV(nrs->rs_rates[i]) >
237 RV(nrs->rs_rates[j])) {
238 r = nrs->rs_rates[i];
239 nrs->rs_rates[i] = nrs->rs_rates[j];
240 nrs->rs_rates[j] = r;
241 }
242 }
243 }
244 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL;
245 badrate = r;
246 if (flags & IEEE80211_F_DOFRATE) {
247 /*
248 * Check fixed rate is included.
249 */
250 if (r == RV(srs->rs_rates[ic->ic_fixed_rate]))
251 fixedrate = r;
252 }
253 if (flags & IEEE80211_F_DONEGO) {
254 /*
255 * Check against supported rates.
256 */
257 for (j = 0; j < srs->rs_nrates; j++) {
258 if (r == RV(srs->rs_rates[j])) {
259 /*
260 * Overwrite with the supported rate
261 * value so any basic rate bit is set.
262 * This insures that response we send
263 * to stations have the necessary basic
264 * rate bit set.
265 */
266 nrs->rs_rates[i] = srs->rs_rates[j];
267 break;
268 }
269 }
270 if (j == srs->rs_nrates) {
271 /*
272 * A rate in the node's rate set is not
273 * supported. If this is a basic rate and we
274 * are operating as an AP then this is an error.
275 * Otherwise we just discard/ignore the rate.
276 * Note that this is important for 11b stations
277 * when they want to associate with an 11g AP.
278 */
279 #ifndef IEEE80211_STA_ONLY
280 if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
281 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC))
282 error++;
283 #endif
284 ignore++;
285 }
286 }
287 if (flags & IEEE80211_F_DODEL) {
288 /*
289 * Delete unacceptable rates.
290 */
291 if (ignore) {
292 nrs->rs_nrates--;
293 for (j = i; j < nrs->rs_nrates; j++)
294 nrs->rs_rates[j] = nrs->rs_rates[j + 1];
295 nrs->rs_rates[j] = 0;
296 continue;
297 }
298 }
299 if (!ignore)
300 okrate = nrs->rs_rates[i];
301 i++;
302 }
303 if (okrate == 0 || error != 0 ||
304 ((flags & IEEE80211_F_DOFRATE) && fixedrate == 0))
305 return badrate | IEEE80211_RATE_BASIC;
306 else
307 return RV(okrate);
308 #undef RV
309 }
310
311 /*
312 * Reset 11g-related state.
313 */
314 void
ieee80211_reset_erp(struct ieee80211com * ic)315 ieee80211_reset_erp(struct ieee80211com *ic)
316 {
317 ic->ic_flags &= ~IEEE80211_F_USEPROT;
318
319 ieee80211_set_shortslottime(ic,
320 ic->ic_curmode == IEEE80211_MODE_11A ||
321 (ic->ic_curmode == IEEE80211_MODE_11N &&
322 IEEE80211_IS_CHAN_5GHZ(ic->ic_ibss_chan))
323 #ifndef IEEE80211_STA_ONLY
324 ||
325 ((ic->ic_curmode == IEEE80211_MODE_11G ||
326 (ic->ic_curmode == IEEE80211_MODE_11N &&
327 IEEE80211_IS_CHAN_2GHZ(ic->ic_ibss_chan))) &&
328 ic->ic_opmode == IEEE80211_M_HOSTAP &&
329 (ic->ic_caps & IEEE80211_C_SHSLOT))
330 #endif
331 );
332
333 if (ic->ic_curmode == IEEE80211_MODE_11A ||
334 (ic->ic_curmode == IEEE80211_MODE_11N &&
335 IEEE80211_IS_CHAN_5GHZ(ic->ic_ibss_chan)) ||
336 (ic->ic_caps & IEEE80211_C_SHPREAMBLE))
337 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
338 else
339 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
340 }
341
342 /*
343 * Set the short slot time state and notify the driver.
344 */
345 void
ieee80211_set_shortslottime(struct ieee80211com * ic,int on)346 ieee80211_set_shortslottime(struct ieee80211com *ic, int on)
347 {
348 if (on)
349 ic->ic_flags |= IEEE80211_F_SHSLOT;
350 else
351 ic->ic_flags &= ~IEEE80211_F_SHSLOT;
352
353 /* notify the driver */
354 if (ic->ic_updateslot != NULL)
355 ic->ic_updateslot(ic);
356 }
357
358 /*
359 * This function is called by the 802.1X PACP machine (via an ioctl) when
360 * the transmit key machine (4-Way Handshake for 802.11) should run.
361 */
362 int
ieee80211_keyrun(struct ieee80211com * ic,u_int8_t * macaddr)363 ieee80211_keyrun(struct ieee80211com *ic, u_int8_t *macaddr)
364 {
365 struct ieee80211_node *ni = ic->ic_bss;
366 #ifndef IEEE80211_STA_ONLY
367 struct ieee80211_pmk *pmk;
368 #endif
369
370 /* STA must be associated or AP must be ready */
371 if (ic->ic_state != IEEE80211_S_RUN ||
372 !(ic->ic_flags & IEEE80211_F_RSNON))
373 return ENETDOWN;
374
375 ni->ni_rsn_supp_state = RSNA_SUPP_PTKSTART;
376 #ifndef IEEE80211_STA_ONLY
377 if (ic->ic_opmode == IEEE80211_M_STA)
378 #endif
379 return 0; /* supplicant only, do nothing */
380
381 #ifndef IEEE80211_STA_ONLY
382 /* find the STA with which we must start the key exchange */
383 if ((ni = ieee80211_find_node(ic, macaddr)) == NULL) {
384 DPRINTF(("no node found for %s\n", ether_sprintf(macaddr)));
385 return EINVAL;
386 }
387 /* check that the STA is in the correct state */
388 if (ni->ni_state != IEEE80211_STA_ASSOC ||
389 ni->ni_rsn_state != RSNA_AUTHENTICATION_2) {
390 DPRINTF(("unexpected in state %d\n", ni->ni_rsn_state));
391 return EINVAL;
392 }
393 ni->ni_rsn_state = RSNA_INITPMK;
394
395 /* make sure a PMK is available for this STA, otherwise deauth it */
396 if ((pmk = ieee80211_pmksa_find(ic, ni, NULL)) == NULL) {
397 DPRINTF(("no PMK available for %s\n", ether_sprintf(macaddr)));
398 IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
399 IEEE80211_REASON_AUTH_LEAVE);
400 ieee80211_node_leave(ic, ni);
401 return EINVAL;
402 }
403 memcpy(ni->ni_pmk, pmk->pmk_key, IEEE80211_PMK_LEN);
404 memcpy(ni->ni_pmkid, pmk->pmk_pmkid, IEEE80211_PMKID_LEN);
405 ni->ni_flags |= IEEE80211_NODE_PMK;
406
407 /* initiate key exchange (4-Way Handshake) with STA */
408 return ieee80211_send_4way_msg1(ic, ni);
409 #endif /* IEEE80211_STA_ONLY */
410 }
411
412 #ifndef IEEE80211_STA_ONLY
413 /*
414 * Initiate a group key handshake with a node.
415 */
416 static void
ieee80211_node_gtk_rekey(void * arg,struct ieee80211_node * ni)417 ieee80211_node_gtk_rekey(void *arg, struct ieee80211_node *ni)
418 {
419 struct ieee80211com *ic = arg;
420
421 if (ni->ni_state != IEEE80211_STA_ASSOC ||
422 ni->ni_rsn_gstate != RSNA_IDLE)
423 return;
424
425 /* initiate a group key handshake with STA */
426 ni->ni_flags |= IEEE80211_NODE_REKEY;
427 if (ieee80211_send_group_msg1(ic, ni) != 0)
428 ni->ni_flags &= ~IEEE80211_NODE_REKEY;
429 }
430
431 /*
432 * This function is called in HostAP mode when the group key needs to be
433 * changed.
434 */
435 void
ieee80211_setkeys(struct ieee80211com * ic)436 ieee80211_setkeys(struct ieee80211com *ic)
437 {
438 struct ieee80211_key *k;
439 u_int8_t kid;
440 int rekeysta = 0;
441
442 /* Swap(GM, GN) */
443 kid = (ic->ic_def_txkey == 1) ? 2 : 1;
444 k = &ic->ic_nw_keys[kid];
445 memset(k, 0, sizeof(*k));
446 k->k_id = kid;
447 k->k_cipher = ic->ic_bss->ni_rsngroupcipher;
448 k->k_flags = IEEE80211_KEY_GROUP | IEEE80211_KEY_TX;
449 k->k_len = ieee80211_cipher_keylen(k->k_cipher);
450 arc4random_buf(k->k_key, k->k_len);
451
452 if (ic->ic_caps & IEEE80211_C_MFP) {
453 /* Swap(GM_igtk, GN_igtk) */
454 kid = (ic->ic_igtk_kid == 4) ? 5 : 4;
455 k = &ic->ic_nw_keys[kid];
456 memset(k, 0, sizeof(*k));
457 k->k_id = kid;
458 k->k_cipher = ic->ic_bss->ni_rsngroupmgmtcipher;
459 k->k_flags = IEEE80211_KEY_IGTK | IEEE80211_KEY_TX;
460 k->k_len = 16;
461 arc4random_buf(k->k_key, k->k_len);
462 }
463
464 ieee80211_iterate_nodes(ic, ieee80211_node_gtk_rekey, ic);
465 ieee80211_iterate_nodes(ic, ieee80211_count_rekeysta, &rekeysta);
466 if (rekeysta == 0)
467 ieee80211_setkeysdone(ic);
468 }
469
470 /*
471 * The group key handshake has been completed with all associated stations.
472 */
473 void
ieee80211_setkeysdone(struct ieee80211com * ic)474 ieee80211_setkeysdone(struct ieee80211com *ic)
475 {
476 u_int8_t kid;
477
478 /* install GTK */
479 kid = (ic->ic_def_txkey == 1) ? 2 : 1;
480 switch ((*ic->ic_set_key)(ic, ic->ic_bss, &ic->ic_nw_keys[kid])) {
481 case 0:
482 case EBUSY:
483 ic->ic_def_txkey = kid;
484 break;
485 default:
486 break;
487 }
488
489 if (ic->ic_caps & IEEE80211_C_MFP) {
490 /* install IGTK */
491 kid = (ic->ic_igtk_kid == 4) ? 5 : 4;
492 switch ((*ic->ic_set_key)(ic, ic->ic_bss, &ic->ic_nw_keys[kid])) {
493 case 0:
494 case EBUSY:
495 ic->ic_igtk_kid = kid;
496 break;
497 default:
498 break;
499 }
500 }
501 }
502
503 /*
504 * Group key lifetime has expired, update it.
505 */
506 void
ieee80211_gtk_rekey_timeout(void * arg)507 ieee80211_gtk_rekey_timeout(void *arg)
508 {
509 struct ieee80211com *ic = arg;
510 int s;
511
512 s = splnet();
513 ieee80211_setkeys(ic);
514 splx(s);
515
516 /* re-schedule a GTK rekeying after 3600s */
517 timeout_add_sec(&ic->ic_rsn_timeout, 3600);
518 }
519
520 void
ieee80211_sa_query_timeout(void * arg)521 ieee80211_sa_query_timeout(void *arg)
522 {
523 struct ieee80211_node *ni = arg;
524 struct ieee80211com *ic = ni->ni_ic;
525 int s;
526
527 s = splnet();
528 if (++ni->ni_sa_query_count >= 3) {
529 ni->ni_flags &= ~IEEE80211_NODE_SA_QUERY;
530 ni->ni_flags |= IEEE80211_NODE_SA_QUERY_FAILED;
531 } else /* retry SA Query Request */
532 ieee80211_sa_query_request(ic, ni);
533 splx(s);
534 }
535
536 /*
537 * Request that a SA Query Request frame be sent to a specified peer STA
538 * to which the STA is associated.
539 */
540 void
ieee80211_sa_query_request(struct ieee80211com * ic,struct ieee80211_node * ni)541 ieee80211_sa_query_request(struct ieee80211com *ic, struct ieee80211_node *ni)
542 {
543 /* MLME-SAQuery.request */
544
545 if (!(ni->ni_flags & IEEE80211_NODE_SA_QUERY)) {
546 ni->ni_flags |= IEEE80211_NODE_SA_QUERY;
547 ni->ni_flags &= ~IEEE80211_NODE_SA_QUERY_FAILED;
548 ni->ni_sa_query_count = 0;
549 }
550 /* generate new Transaction Identifier */
551 ni->ni_sa_query_trid++;
552
553 /* send SA Query Request */
554 IEEE80211_SEND_ACTION(ic, ni, IEEE80211_CATEG_SA_QUERY,
555 IEEE80211_ACTION_SA_QUERY_REQ, 0);
556 timeout_add_msec(&ni->ni_sa_query_to, 10);
557 }
558 #endif /* IEEE80211_STA_ONLY */
559
560 void
ieee80211_ht_negotiate(struct ieee80211com * ic,struct ieee80211_node * ni)561 ieee80211_ht_negotiate(struct ieee80211com *ic, struct ieee80211_node *ni)
562 {
563 int i;
564
565 ni->ni_flags &= ~(IEEE80211_NODE_HT | IEEE80211_NODE_HT_SGI20 |
566 IEEE80211_NODE_HT_SGI40);
567
568 /* Check if we support HT. */
569 if ((ic->ic_modecaps & (1 << IEEE80211_MODE_11N)) == 0)
570 return;
571
572 /* Check if HT support has been explicitly disabled. */
573 if ((ic->ic_flags & IEEE80211_F_HTON) == 0)
574 return;
575
576 /*
577 * Check if the peer supports HT.
578 * Require at least one of the mandatory MCS.
579 * MCS 0-7 are mandatory but some APs have particular MCS disabled.
580 */
581 if (!ieee80211_node_supports_ht(ni)) {
582 ic->ic_stats.is_ht_nego_no_mandatory_mcs++;
583 return;
584 }
585
586 if (ic->ic_opmode == IEEE80211_M_STA) {
587 /* We must support the AP's basic MCS set. */
588 for (i = 0; i < IEEE80211_HT_NUM_MCS; i++) {
589 if (isset(ni->ni_basic_mcs, i) &&
590 !isset(ic->ic_sup_mcs, i)) {
591 ic->ic_stats.is_ht_nego_no_basic_mcs++;
592 return;
593 }
594 }
595 }
596
597 /*
598 * Don't allow group cipher (includes WEP) or TKIP
599 * for pairwise encryption (see 802.11-2012 11.1.6).
600 */
601 if (ic->ic_flags & IEEE80211_F_WEPON) {
602 ic->ic_stats.is_ht_nego_bad_crypto++;
603 return;
604 }
605 if ((ic->ic_flags & IEEE80211_F_RSNON) &&
606 (ni->ni_rsnciphers & IEEE80211_CIPHER_USEGROUP ||
607 ni->ni_rsnciphers & IEEE80211_CIPHER_TKIP)) {
608 ic->ic_stats.is_ht_nego_bad_crypto++;
609 return;
610 }
611
612 ni->ni_flags |= IEEE80211_NODE_HT;
613
614 if (ieee80211_node_supports_ht_sgi20(ni) &&
615 (ic->ic_htcaps & IEEE80211_HTCAP_SGI20))
616 ni->ni_flags |= IEEE80211_NODE_HT_SGI20;
617 if (ieee80211_node_supports_ht_sgi40(ni) &&
618 (ic->ic_htcaps & IEEE80211_HTCAP_SGI40))
619 ni->ni_flags |= IEEE80211_NODE_HT_SGI40;
620 }
621
622 void
ieee80211_vht_negotiate(struct ieee80211com * ic,struct ieee80211_node * ni)623 ieee80211_vht_negotiate(struct ieee80211com *ic, struct ieee80211_node *ni)
624 {
625 int n;
626
627 ni->ni_flags &= ~(IEEE80211_NODE_VHT | IEEE80211_NODE_VHT_SGI80 |
628 IEEE80211_NODE_VHT_SGI160);
629
630 /* Check if we support VHT. */
631 if ((ic->ic_modecaps & (1 << IEEE80211_MODE_11AC)) == 0)
632 return;
633
634 /* Check if VHT support has been explicitly disabled. */
635 if ((ic->ic_flags & IEEE80211_F_VHTON) == 0)
636 return;
637
638 /*
639 * Check if the peer supports VHT.
640 * MCS 0-7 for a single spatial stream are mandatory.
641 */
642 if (!ieee80211_node_supports_vht(ni)) {
643 ic->ic_stats.is_vht_nego_no_mandatory_mcs++;
644 return;
645 }
646
647 if (ic->ic_opmode == IEEE80211_M_STA) {
648 /* We must support the AP's basic MCS set. */
649 for (n = 1; n <= IEEE80211_VHT_NUM_SS; n++) {
650 uint16_t basic_mcs = (ni->ni_vht_basic_mcs &
651 IEEE80211_VHT_MCS_FOR_SS_MASK(n)) >>
652 IEEE80211_VHT_MCS_FOR_SS_SHIFT(n);
653 uint16_t rx_mcs = (ic->ic_vht_rxmcs &
654 IEEE80211_VHT_MCS_FOR_SS_MASK(n)) >>
655 IEEE80211_VHT_MCS_FOR_SS_SHIFT(n);
656 if (basic_mcs != IEEE80211_VHT_MCS_SS_NOT_SUPP &&
657 basic_mcs > rx_mcs) {
658 ic->ic_stats.is_vht_nego_no_basic_mcs++;
659 return;
660 }
661 }
662 }
663
664 ni->ni_flags |= IEEE80211_NODE_VHT;
665
666 if ((ni->ni_vhtcaps & IEEE80211_VHTCAP_SGI80) &&
667 (ic->ic_vhtcaps & IEEE80211_VHTCAP_SGI80))
668 ni->ni_flags |= IEEE80211_NODE_VHT_SGI80;
669 if ((ni->ni_vhtcaps & IEEE80211_VHTCAP_SGI160) &&
670 (ic->ic_vhtcaps & IEEE80211_VHTCAP_SGI160))
671 ni->ni_flags |= IEEE80211_NODE_VHT_SGI160;
672 }
673
674 void
ieee80211_tx_ba_timeout(void * arg)675 ieee80211_tx_ba_timeout(void *arg)
676 {
677 struct ieee80211_tx_ba *ba = arg;
678 struct ieee80211_node *ni = ba->ba_ni;
679 struct ieee80211com *ic = ni->ni_ic;
680 u_int8_t tid;
681 int s;
682
683 s = splnet();
684 tid = ((caddr_t)ba - (caddr_t)ni->ni_tx_ba) / sizeof(*ba);
685 if (ba->ba_state == IEEE80211_BA_REQUESTED) {
686 /* MLME-ADDBA.confirm(TIMEOUT) */
687 ba->ba_state = IEEE80211_BA_INIT;
688 if (ni->ni_addba_req_intval[tid] <
689 IEEE80211_ADDBA_REQ_INTVAL_MAX)
690 ni->ni_addba_req_intval[tid]++;
691 /*
692 * In case the peer believes there is an existing
693 * block ack agreement with us, try to delete it.
694 */
695 IEEE80211_SEND_ACTION(ic, ni, IEEE80211_CATEG_BA,
696 IEEE80211_ACTION_DELBA,
697 IEEE80211_REASON_SETUP_REQUIRED << 16 | 1 << 8 | tid);
698 } else if (ba->ba_state == IEEE80211_BA_AGREED) {
699 /* Block Ack inactivity timeout */
700 ic->ic_stats.is_ht_tx_ba_timeout++;
701 ieee80211_delba_request(ic, ni, IEEE80211_REASON_TIMEOUT,
702 1, tid);
703 }
704 splx(s);
705 }
706
707 void
ieee80211_rx_ba_timeout(void * arg)708 ieee80211_rx_ba_timeout(void *arg)
709 {
710 struct ieee80211_rx_ba *ba = arg;
711 struct ieee80211_node *ni = ba->ba_ni;
712 struct ieee80211com *ic = ni->ni_ic;
713 u_int8_t tid;
714 int s;
715
716 ic->ic_stats.is_ht_rx_ba_timeout++;
717
718 s = splnet();
719
720 /* Block Ack inactivity timeout */
721 tid = ((caddr_t)ba - (caddr_t)ni->ni_rx_ba) / sizeof(*ba);
722 ieee80211_delba_request(ic, ni, IEEE80211_REASON_TIMEOUT, 0, tid);
723
724 splx(s);
725 }
726
727 /*
728 * Request initiation of Block Ack with the specified peer.
729 */
730 int
ieee80211_addba_request(struct ieee80211com * ic,struct ieee80211_node * ni,u_int16_t ssn,u_int8_t tid)731 ieee80211_addba_request(struct ieee80211com *ic, struct ieee80211_node *ni,
732 u_int16_t ssn, u_int8_t tid)
733 {
734 struct ieee80211_tx_ba *ba = &ni->ni_tx_ba[tid];
735
736 if (ba->ba_state != IEEE80211_BA_INIT)
737 return EBUSY;
738
739 /* MLME-ADDBA.request */
740
741 /* setup Block Ack */
742 ba->ba_ni = ni;
743 ba->ba_state = IEEE80211_BA_REQUESTED;
744 ba->ba_token = ic->ic_dialog_token++;
745 ba->ba_timeout_val = 0;
746 timeout_set(&ba->ba_to, ieee80211_tx_ba_timeout, ba);
747 ba->ba_winsize = IEEE80211_BA_MAX_WINSZ;
748 ba->ba_winstart = ssn;
749 ba->ba_winend = (ba->ba_winstart + ba->ba_winsize - 1) & 0xfff;
750 ba->ba_params =
751 (ba->ba_winsize << IEEE80211_ADDBA_BUFSZ_SHIFT) |
752 (tid << IEEE80211_ADDBA_TID_SHIFT);
753 ba->ba_params |= IEEE80211_ADDBA_AMSDU;
754 if ((ic->ic_htcaps & IEEE80211_HTCAP_DELAYEDBA) == 0)
755 /* immediate BA */
756 ba->ba_params |= IEEE80211_ADDBA_BA_POLICY;
757
758 if ((ic->ic_caps & IEEE80211_C_ADDBA_OFFLOAD) &&
759 ic->ic_ampdu_tx_start != NULL) {
760 int err = ic->ic_ampdu_tx_start(ic, ni, tid);
761 if (err && err != EBUSY) {
762 /* driver failed to setup, rollback */
763 ieee80211_addba_resp_refuse(ic, ni, tid,
764 IEEE80211_STATUS_UNSPECIFIED);
765 } else if (err == 0)
766 ieee80211_addba_resp_accept(ic, ni, tid);
767 return err; /* The device will send an ADDBA frame. */
768 }
769
770 timeout_add_sec(&ba->ba_to, 1); /* dot11ADDBAResponseTimeout */
771 IEEE80211_SEND_ACTION(ic, ni, IEEE80211_CATEG_BA,
772 IEEE80211_ACTION_ADDBA_REQ, tid);
773 return 0;
774 }
775
776 /*
777 * Request the deletion of Block Ack with a peer and notify driver.
778 */
779 void
ieee80211_delba_request(struct ieee80211com * ic,struct ieee80211_node * ni,u_int16_t reason,u_int8_t dir,u_int8_t tid)780 ieee80211_delba_request(struct ieee80211com *ic, struct ieee80211_node *ni,
781 u_int16_t reason, u_int8_t dir, u_int8_t tid)
782 {
783 /* MLME-DELBA.request */
784
785 if (reason) {
786 /* transmit a DELBA frame */
787 IEEE80211_SEND_ACTION(ic, ni, IEEE80211_CATEG_BA,
788 IEEE80211_ACTION_DELBA, reason << 16 | dir << 8 | tid);
789 }
790 if (dir) {
791 /* MLME-DELBA.confirm(Originator) */
792 if (ic->ic_ampdu_tx_stop != NULL)
793 ic->ic_ampdu_tx_stop(ic, ni, tid);
794 ieee80211_node_tx_ba_clear(ni, tid);
795 } else {
796 /* MLME-DELBA.confirm(Recipient) */
797 struct ieee80211_rx_ba *ba = &ni->ni_rx_ba[tid];
798 int i;
799
800 if (ic->ic_ampdu_rx_stop != NULL)
801 ic->ic_ampdu_rx_stop(ic, ni, tid);
802
803 ba->ba_state = IEEE80211_BA_INIT;
804 /* stop Block Ack inactivity timer */
805 timeout_del(&ba->ba_to);
806 timeout_del(&ba->ba_gap_to);
807
808 if (ba->ba_buf != NULL) {
809 /* free all MSDUs stored in reordering buffer */
810 for (i = 0; i < IEEE80211_BA_MAX_WINSZ; i++)
811 m_freem(ba->ba_buf[i].m);
812 /* free reordering buffer */
813 free(ba->ba_buf, M_DEVBUF,
814 IEEE80211_BA_MAX_WINSZ * sizeof(*ba->ba_buf));
815 ba->ba_buf = NULL;
816 }
817 }
818 }
819
820 #ifndef IEEE80211_STA_ONLY
821 void
ieee80211_auth_open_confirm(struct ieee80211com * ic,struct ieee80211_node * ni,uint16_t seq)822 ieee80211_auth_open_confirm(struct ieee80211com *ic,
823 struct ieee80211_node *ni, uint16_t seq)
824 {
825 struct ifnet *ifp = &ic->ic_if;
826
827 IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
828 if (ifp->if_flags & IFF_DEBUG)
829 printf("%s: station %s %s authenticated (open)\n",
830 ifp->if_xname,
831 ether_sprintf((u_int8_t *)ni->ni_macaddr),
832 ni->ni_state != IEEE80211_STA_CACHE ?
833 "newly" : "already");
834 ieee80211_node_newstate(ni, IEEE80211_STA_AUTH);
835 }
836 #endif
837
838 void
ieee80211_try_another_bss(struct ieee80211com * ic)839 ieee80211_try_another_bss(struct ieee80211com *ic)
840 {
841 struct ieee80211_node *curbs, *selbs;
842 struct ifnet *ifp = &ic->ic_if;
843
844 /* Don't select our current AP again. */
845 curbs = ieee80211_find_node(ic, ic->ic_bss->ni_macaddr);
846 if (curbs) {
847 curbs->ni_fails++;
848 ieee80211_node_newstate(curbs, IEEE80211_STA_CACHE);
849 }
850
851 /* Try a different AP from the same ESS if available. */
852 if (ic->ic_caps & IEEE80211_C_SCANALLBAND) {
853 /*
854 * Make sure we will consider APs on all bands during
855 * access point selection in ieee80211_node_choose_bss().
856 * During multi-band scans, our previous AP may be trying
857 * to steer us onto another band by denying authentication.
858 */
859 ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
860 }
861 selbs = ieee80211_node_choose_bss(ic, 0, NULL);
862 if (selbs == NULL)
863 return;
864
865 /* Should not happen but seriously, don't try the same AP again. */
866 if (memcmp(selbs->ni_macaddr, ic->ic_bss->ni_macaddr,
867 IEEE80211_ADDR_LEN) == 0)
868 return;
869
870 if (ifp->if_flags & IFF_DEBUG)
871 printf("%s: trying AP %s on channel %d instead\n",
872 ifp->if_xname, ether_sprintf(selbs->ni_macaddr),
873 ieee80211_chan2ieee(ic, selbs->ni_chan));
874
875 /* Triggers an AUTH->AUTH transition, avoiding another SCAN. */
876 ieee80211_node_join_bss(ic, selbs);
877 }
878
879 void
ieee80211_auth_open(struct ieee80211com * ic,const struct ieee80211_frame * wh,struct ieee80211_node * ni,struct ieee80211_rxinfo * rxi,u_int16_t seq,u_int16_t status)880 ieee80211_auth_open(struct ieee80211com *ic, const struct ieee80211_frame *wh,
881 struct ieee80211_node *ni, struct ieee80211_rxinfo *rxi, u_int16_t seq,
882 u_int16_t status)
883 {
884 struct ifnet *ifp = &ic->ic_if;
885 switch (ic->ic_opmode) {
886 #ifndef IEEE80211_STA_ONLY
887 case IEEE80211_M_IBSS:
888 if (ic->ic_state != IEEE80211_S_RUN ||
889 seq != IEEE80211_AUTH_OPEN_REQUEST) {
890 DPRINTF(("discard auth from %s; state %u, seq %u\n",
891 ether_sprintf((u_int8_t *)wh->i_addr2),
892 ic->ic_state, seq));
893 ic->ic_stats.is_rx_bad_auth++;
894 return;
895 }
896 ieee80211_new_state(ic, IEEE80211_S_AUTH,
897 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK);
898
899 /* In IBSS mode no (re)association frames are sent. */
900 if (ic->ic_flags & IEEE80211_F_RSNON)
901 ni->ni_rsn_supp_state = RSNA_SUPP_PTKSTART;
902 break;
903
904 case IEEE80211_M_AHDEMO:
905 /* should not come here */
906 break;
907
908 case IEEE80211_M_HOSTAP:
909 if (ic->ic_state != IEEE80211_S_RUN ||
910 seq != IEEE80211_AUTH_OPEN_REQUEST) {
911 DPRINTF(("discard auth from %s; state %u, seq %u\n",
912 ether_sprintf((u_int8_t *)wh->i_addr2),
913 ic->ic_state, seq));
914 ic->ic_stats.is_rx_bad_auth++;
915 return;
916 }
917 if (ni == ic->ic_bss) {
918 ni = ieee80211_find_node(ic, wh->i_addr2);
919 if (ni == NULL)
920 ni = ieee80211_alloc_node(ic, wh->i_addr2);
921 if (ni == NULL) {
922 return;
923 }
924 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid);
925 ni->ni_rssi = rxi->rxi_rssi;
926 ni->ni_rstamp = rxi->rxi_tstamp;
927 ni->ni_chan = ic->ic_bss->ni_chan;
928 }
929
930 /*
931 * Drivers may want to set up state before confirming.
932 * In which case this returns EBUSY and the driver will
933 * later call ieee80211_auth_open_confirm() by itself.
934 */
935 if (ic->ic_newauth && ic->ic_newauth(ic, ni,
936 ni->ni_state != IEEE80211_STA_CACHE, seq) != 0)
937 break;
938 ieee80211_auth_open_confirm(ic, ni, seq);
939 break;
940 #endif /* IEEE80211_STA_ONLY */
941
942 case IEEE80211_M_STA:
943 if (ic->ic_state != IEEE80211_S_AUTH ||
944 seq != IEEE80211_AUTH_OPEN_RESPONSE) {
945 ic->ic_stats.is_rx_bad_auth++;
946 DPRINTF(("discard auth from %s; state %u, seq %u\n",
947 ether_sprintf((u_int8_t *)wh->i_addr2),
948 ic->ic_state, seq));
949 return;
950 }
951 if (ic->ic_flags & IEEE80211_F_RSNON) {
952 /* XXX not here! */
953 ic->ic_bss->ni_flags &= ~IEEE80211_NODE_TXRXPROT;
954 ic->ic_bss->ni_port_valid = 0;
955 ic->ic_bss->ni_replaycnt_ok = 0;
956 (*ic->ic_delete_key)(ic, ic->ic_bss,
957 &ic->ic_bss->ni_pairwise_key);
958 }
959 if (status != 0) {
960 if (ifp->if_flags & IFF_DEBUG)
961 printf("%s: open authentication failed "
962 "(status %d) for %s\n", ifp->if_xname,
963 status,
964 ether_sprintf((u_int8_t *)wh->i_addr3));
965 if (ni != ic->ic_bss)
966 ni->ni_fails++;
967 else
968 ieee80211_try_another_bss(ic);
969 ic->ic_stats.is_rx_auth_fail++;
970 return;
971 }
972 ieee80211_new_state(ic, IEEE80211_S_ASSOC,
973 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK);
974 break;
975 default:
976 break;
977 }
978 }
979
980 void
ieee80211_set_beacon_miss_threshold(struct ieee80211com * ic)981 ieee80211_set_beacon_miss_threshold(struct ieee80211com *ic)
982 {
983 struct ifnet *ifp = &ic->ic_if;
984
985 /*
986 * Scale the missed beacon counter threshold to the AP's actual
987 * beacon interval.
988 */
989 int btimeout = MIN(IEEE80211_BEACON_MISS_THRES * ic->ic_bss->ni_intval,
990 IEEE80211_BEACON_MISS_THRES * (IEEE80211_DUR_TU / 10));
991 /* Ensure that at least one beacon may be missed. */
992 btimeout = MAX(btimeout, 2 * ic->ic_bss->ni_intval);
993 if (ic->ic_bss->ni_intval > 0) /* don't crash if interval is bogus */
994 ic->ic_bmissthres = btimeout / ic->ic_bss->ni_intval;
995
996 if (ifp->if_flags & IFF_DEBUG)
997 printf("%s: missed beacon threshold set to %d beacons, "
998 "beacon interval is %u TU\n", ifp->if_xname,
999 ic->ic_bmissthres, ic->ic_bss->ni_intval);
1000 }
1001
1002 /* Tell our peer, and the driver, to stop A-MPDU Tx for all TIDs. */
1003 void
ieee80211_stop_ampdu_tx(struct ieee80211com * ic,struct ieee80211_node * ni,int mgt)1004 ieee80211_stop_ampdu_tx(struct ieee80211com *ic, struct ieee80211_node *ni,
1005 int mgt)
1006 {
1007 int tid;
1008
1009 for (tid = 0; tid < nitems(ni->ni_tx_ba); tid++) {
1010 struct ieee80211_tx_ba *ba = &ni->ni_tx_ba[tid];
1011 if (ba->ba_state != IEEE80211_BA_AGREED)
1012 continue;
1013
1014 if (ic->ic_caps & IEEE80211_C_ADDBA_OFFLOAD) {
1015 if (ic->ic_ampdu_tx_stop != NULL)
1016 ic->ic_ampdu_tx_stop(ic, ni, tid);
1017 continue; /* Don't change ba->ba_state! */
1018 }
1019
1020 ieee80211_delba_request(ic, ni,
1021 mgt == -1 ? 0 : IEEE80211_REASON_AUTH_LEAVE, 1, tid);
1022 }
1023 }
1024
1025 void
ieee80211_check_wpa_supplicant_failure(struct ieee80211com * ic,struct ieee80211_node * ni)1026 ieee80211_check_wpa_supplicant_failure(struct ieee80211com *ic,
1027 struct ieee80211_node *ni)
1028 {
1029 struct ieee80211_node *ni2;
1030
1031 if (ic->ic_opmode != IEEE80211_M_STA
1032 #ifndef IEEE80211_STA_ONLY
1033 && ic->ic_opmode != IEEE80211_M_IBSS
1034 #endif
1035 )
1036 return;
1037
1038 if (ni->ni_rsn_supp_state != RSNA_SUPP_PTKNEGOTIATING)
1039 return;
1040
1041 ni->ni_assoc_fail |= IEEE80211_NODE_ASSOCFAIL_WPA_KEY;
1042
1043 if (ni != ic->ic_bss)
1044 return;
1045
1046 /* Also update the copy of our AP's node in the node cache. */
1047 ni2 = ieee80211_find_node(ic, ic->ic_bss->ni_macaddr);
1048 if (ni2)
1049 ni2->ni_assoc_fail |= ic->ic_bss->ni_assoc_fail;
1050 }
1051
1052 int
ieee80211_newstate(struct ieee80211com * ic,enum ieee80211_state nstate,int mgt)1053 ieee80211_newstate(struct ieee80211com *ic, enum ieee80211_state nstate,
1054 int mgt)
1055 {
1056 struct ifnet *ifp = &ic->ic_if;
1057 struct ieee80211_node *ni;
1058 enum ieee80211_state ostate;
1059 u_int rate;
1060 #ifndef IEEE80211_STA_ONLY
1061 int s;
1062 #endif
1063
1064 ostate = ic->ic_state;
1065 #ifdef __FreeBSD_version
1066 if (bootverbose || ifp->if_flags & IFF_DEBUG)
1067 #else
1068 if (ifp->if_flags & IFF_DEBUG)
1069 #endif
1070 printf("%s: %s -> %s\n", ifp->if_xname,
1071 ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
1072 ic->ic_state = nstate; /* state transition */
1073 ni = ic->ic_bss; /* NB: no reference held */
1074 ieee80211_set_link_state(ic, LINK_STATE_DOWN);
1075 ic->ic_xflags &= ~IEEE80211_F_TX_MGMT_ONLY;
1076 switch (nstate) {
1077 case IEEE80211_S_INIT:
1078 /*
1079 * If mgt = -1, driver is already partway down, so do
1080 * not send management frames.
1081 */
1082 switch (ostate) {
1083 case IEEE80211_S_INIT:
1084 break;
1085 case IEEE80211_S_RUN:
1086 if (mgt == -1)
1087 goto justcleanup;
1088 ieee80211_stop_ampdu_tx(ic, ni, mgt);
1089 ieee80211_ba_del(ni);
1090 switch (ic->ic_opmode) {
1091 case IEEE80211_M_STA:
1092 IEEE80211_SEND_MGMT(ic, ni,
1093 IEEE80211_FC0_SUBTYPE_DISASSOC,
1094 IEEE80211_REASON_ASSOC_LEAVE);
1095 break;
1096 #ifndef IEEE80211_STA_ONLY
1097 case IEEE80211_M_HOSTAP:
1098 s = splnet();
1099 RBT_FOREACH(ni, ieee80211_tree, &ic->ic_tree) {
1100 if (ni->ni_state != IEEE80211_STA_ASSOC)
1101 continue;
1102 IEEE80211_SEND_MGMT(ic, ni,
1103 IEEE80211_FC0_SUBTYPE_DISASSOC,
1104 IEEE80211_REASON_ASSOC_LEAVE);
1105 }
1106 splx(s);
1107 break;
1108 #endif
1109 default:
1110 break;
1111 }
1112 /* FALLTHROUGH */
1113 case IEEE80211_S_ASSOC:
1114 if (mgt == -1)
1115 goto justcleanup;
1116 switch (ic->ic_opmode) {
1117 case IEEE80211_M_STA:
1118 IEEE80211_SEND_MGMT(ic, ni,
1119 IEEE80211_FC0_SUBTYPE_DEAUTH,
1120 IEEE80211_REASON_AUTH_LEAVE);
1121 break;
1122 #ifndef IEEE80211_STA_ONLY
1123 case IEEE80211_M_HOSTAP:
1124 s = splnet();
1125 RBT_FOREACH(ni, ieee80211_tree, &ic->ic_tree) {
1126 IEEE80211_SEND_MGMT(ic, ni,
1127 IEEE80211_FC0_SUBTYPE_DEAUTH,
1128 IEEE80211_REASON_AUTH_LEAVE);
1129 }
1130 splx(s);
1131 break;
1132 #endif
1133 default:
1134 break;
1135 }
1136 /* FALLTHROUGH */
1137 case IEEE80211_S_AUTH:
1138 case IEEE80211_S_SCAN:
1139 justcleanup:
1140 #ifndef IEEE80211_STA_ONLY
1141 if (ic->ic_opmode == IEEE80211_M_HOSTAP)
1142 timeout_del(&ic->ic_rsn_timeout);
1143 #endif
1144 ieee80211_ba_del(ni);
1145 timeout_del(&ic->ic_bgscan_timeout);
1146 ic->ic_bgscan_fail = 0;
1147 ic->ic_mgt_timer = 0;
1148 mq_purge(&ic->ic_mgtq);
1149 mq_purge(&ic->ic_pwrsaveq);
1150 ieee80211_free_allnodes(ic, 1);
1151 break;
1152 }
1153 ni->ni_rsn_supp_state = RSNA_SUPP_INITIALIZE;
1154 ni->ni_assoc_fail = 0;
1155 if (ic->ic_flags & IEEE80211_F_RSNON)
1156 ieee80211_crypto_clear_groupkeys(ic);
1157 break;
1158 case IEEE80211_S_SCAN:
1159 ic->ic_flags &= ~IEEE80211_F_SIBSS;
1160 /* initialize bss for probe request */
1161 IEEE80211_ADDR_COPY(ni->ni_macaddr, etherbroadcastaddr);
1162 IEEE80211_ADDR_COPY(ni->ni_bssid, etherbroadcastaddr);
1163 ni->ni_rates = ic->ic_sup_rates[
1164 ieee80211_chan2mode(ic, ni->ni_chan)];
1165 ni->ni_associd = 0;
1166 ni->ni_rstamp = 0;
1167 ni->ni_rsn_supp_state = RSNA_SUPP_INITIALIZE;
1168 if (ic->ic_flags & IEEE80211_F_RSNON)
1169 ieee80211_crypto_clear_groupkeys(ic);
1170 switch (ostate) {
1171 case IEEE80211_S_INIT:
1172 #ifndef IEEE80211_STA_ONLY
1173 if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
1174 ic->ic_des_chan != IEEE80211_CHAN_ANYC) {
1175 /*
1176 * AP operation and we already have a channel;
1177 * bypass the scan and startup immediately.
1178 */
1179 ieee80211_create_ibss(ic, ic->ic_des_chan);
1180 } else
1181 #endif
1182 ieee80211_begin_scan(ifp);
1183 break;
1184 case IEEE80211_S_SCAN:
1185 /* scan next */
1186 if (ic->ic_flags & IEEE80211_F_ASCAN) {
1187 IEEE80211_SEND_MGMT(ic, ni,
1188 IEEE80211_FC0_SUBTYPE_PROBE_REQ, 0);
1189 }
1190 break;
1191 case IEEE80211_S_RUN:
1192 /* beacon miss */
1193 if (ifp->if_flags & IFF_DEBUG) {
1194 /* XXX bssid clobbered above */
1195 printf("%s: no recent beacons from %s;"
1196 " rescanning\n", ifp->if_xname,
1197 ether_sprintf(ic->ic_bss->ni_bssid));
1198 }
1199 timeout_del(&ic->ic_bgscan_timeout);
1200 ic->ic_bgscan_fail = 0;
1201 ieee80211_stop_ampdu_tx(ic, ni, mgt);
1202 ieee80211_free_allnodes(ic, 1);
1203 /* FALLTHROUGH */
1204 case IEEE80211_S_AUTH:
1205 case IEEE80211_S_ASSOC:
1206 /* timeout restart scan */
1207 ni = ieee80211_find_node(ic, ic->ic_bss->ni_macaddr);
1208 if (ni != NULL)
1209 ni->ni_fails++;
1210 ieee80211_begin_scan(ifp);
1211 break;
1212 }
1213 break;
1214 case IEEE80211_S_AUTH:
1215 if (ostate == IEEE80211_S_RUN)
1216 ieee80211_check_wpa_supplicant_failure(ic, ni);
1217 ni->ni_rsn_supp_state = RSNA_SUPP_INITIALIZE;
1218 if (ic->ic_flags & IEEE80211_F_RSNON)
1219 ieee80211_crypto_clear_groupkeys(ic);
1220 switch (ostate) {
1221 case IEEE80211_S_INIT:
1222 if (ifp->if_flags & IFF_DEBUG)
1223 printf("%s: invalid transition %s -> %s\n",
1224 ifp->if_xname, ieee80211_state_name[ostate],
1225 ieee80211_state_name[nstate]);
1226 break;
1227 case IEEE80211_S_SCAN:
1228 IEEE80211_SEND_MGMT(ic, ni,
1229 IEEE80211_FC0_SUBTYPE_AUTH, 1);
1230 break;
1231 case IEEE80211_S_AUTH:
1232 case IEEE80211_S_ASSOC:
1233 switch (mgt) {
1234 case IEEE80211_FC0_SUBTYPE_AUTH:
1235 if (ic->ic_opmode == IEEE80211_M_STA) {
1236 IEEE80211_SEND_MGMT(ic, ni,
1237 IEEE80211_FC0_SUBTYPE_AUTH,
1238 IEEE80211_AUTH_OPEN_REQUEST);
1239 }
1240 break;
1241 case IEEE80211_FC0_SUBTYPE_DEAUTH:
1242 /* ignore and retry scan on timeout */
1243 break;
1244 }
1245 break;
1246 case IEEE80211_S_RUN:
1247 timeout_del(&ic->ic_bgscan_timeout);
1248 ic->ic_bgscan_fail = 0;
1249 ieee80211_stop_ampdu_tx(ic, ni, mgt);
1250 ieee80211_ba_del(ni);
1251 switch (mgt) {
1252 case IEEE80211_FC0_SUBTYPE_AUTH:
1253 IEEE80211_SEND_MGMT(ic, ni,
1254 IEEE80211_FC0_SUBTYPE_AUTH, 2);
1255 ic->ic_state = ostate; /* stay RUN */
1256 break;
1257 case IEEE80211_FC0_SUBTYPE_DEAUTH:
1258 /* try to reauth */
1259 IEEE80211_SEND_MGMT(ic, ni,
1260 IEEE80211_FC0_SUBTYPE_AUTH, 1);
1261 break;
1262 }
1263 break;
1264 }
1265 break;
1266 case IEEE80211_S_ASSOC:
1267 switch (ostate) {
1268 case IEEE80211_S_INIT:
1269 case IEEE80211_S_SCAN:
1270 case IEEE80211_S_ASSOC:
1271 if (ifp->if_flags & IFF_DEBUG)
1272 printf("%s: invalid transition %s -> %s\n",
1273 ifp->if_xname, ieee80211_state_name[ostate],
1274 ieee80211_state_name[nstate]);
1275 break;
1276 case IEEE80211_S_AUTH:
1277 IEEE80211_SEND_MGMT(ic, ni,
1278 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0);
1279 break;
1280 case IEEE80211_S_RUN:
1281 ieee80211_stop_ampdu_tx(ic, ni, mgt);
1282 ieee80211_ba_del(ni);
1283 IEEE80211_SEND_MGMT(ic, ni,
1284 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 1);
1285 break;
1286 }
1287 break;
1288 case IEEE80211_S_RUN:
1289 switch (ostate) {
1290 case IEEE80211_S_INIT:
1291 if (ic->ic_opmode == IEEE80211_M_MONITOR)
1292 break;
1293 case IEEE80211_S_AUTH:
1294 case IEEE80211_S_RUN:
1295 if (ifp->if_flags & IFF_DEBUG)
1296 printf("%s: invalid transition %s -> %s\n",
1297 ifp->if_xname, ieee80211_state_name[ostate],
1298 ieee80211_state_name[nstate]);
1299 break;
1300 case IEEE80211_S_SCAN: /* adhoc/hostap mode */
1301 case IEEE80211_S_ASSOC: /* infra mode */
1302 if (ni->ni_txrate >= ni->ni_rates.rs_nrates)
1303 panic("%s: bogus xmit rate %u setup",
1304 __func__, ni->ni_txrate);
1305 if (ifp->if_flags & IFF_DEBUG) {
1306 printf("%s: %s with %s ssid ",
1307 ifp->if_xname,
1308 ic->ic_opmode == IEEE80211_M_STA ?
1309 "associated" : "synchronized",
1310 ether_sprintf(ni->ni_bssid));
1311 ieee80211_print_essid(ic->ic_bss->ni_essid,
1312 ni->ni_esslen);
1313 rate = ni->ni_rates.rs_rates[ni->ni_txrate] &
1314 IEEE80211_RATE_VAL;
1315 printf(" channel %d",
1316 ieee80211_chan2ieee(ic, ni->ni_chan));
1317 if (ni->ni_flags & IEEE80211_NODE_HT)
1318 printf(" start MCS %u", ni->ni_txmcs);
1319 else
1320 printf(" start %u%sMb",
1321 rate / 2, (rate & 1) ? ".5" : "");
1322 printf(" %s preamble %s slot time%s%s%s\n",
1323 (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ?
1324 "short" : "long",
1325 (ic->ic_flags & IEEE80211_F_SHSLOT) ?
1326 "short" : "long",
1327 (ic->ic_flags & IEEE80211_F_USEPROT) ?
1328 " protection enabled" : "",
1329 (ni->ni_flags & IEEE80211_NODE_HT) ?
1330 " HT enabled" : "",
1331 (ni->ni_flags & IEEE80211_NODE_VHT) ?
1332 " VHT enabled" : "");
1333 }
1334 if (!(ic->ic_flags & IEEE80211_F_RSNON)) {
1335 /*
1336 * NB: When RSN is enabled, we defer setting
1337 * the link up until the port is valid.
1338 */
1339 ieee80211_set_link_state(ic, LINK_STATE_UP);
1340 ni->ni_assoc_fail = 0;
1341 }
1342 ic->ic_mgt_timer = 0;
1343 ieee80211_set_beacon_miss_threshold(ic);
1344 if_start(ifp);
1345 break;
1346 }
1347 break;
1348 }
1349 return 0;
1350 }
1351
1352 #ifndef __FreeBSD_version
1353 void
ieee80211_rtm_80211info_task(void * arg)1354 ieee80211_rtm_80211info_task(void *arg)
1355 {
1356 struct ieee80211com *ic = arg;
1357 struct ifnet *ifp = &ic->ic_if;
1358 struct if_ieee80211_data ifie;
1359 int s = splnet();
1360
1361 if (LINK_STATE_IS_UP(ifp->if_link_state)) {
1362 memset(&ifie, 0, sizeof(ifie));
1363 ifie.ifie_nwid_len = ic->ic_bss->ni_esslen;
1364 memcpy(ifie.ifie_nwid, ic->ic_bss->ni_essid,
1365 sizeof(ifie.ifie_nwid));
1366 memcpy(ifie.ifie_addr, ic->ic_bss->ni_bssid,
1367 sizeof(ifie.ifie_addr));
1368 ifie.ifie_channel = ieee80211_chan2ieee(ic,
1369 ic->ic_bss->ni_chan);
1370 ifie.ifie_flags = ic->ic_flags;
1371 ifie.ifie_xflags = ic->ic_xflags;
1372 rtm_80211info(&ic->ic_if, &ifie);
1373 }
1374
1375 splx(s);
1376 }
1377 #endif
1378
1379 void
ieee80211_set_link_state(struct ieee80211com * ic,int nstate)1380 ieee80211_set_link_state(struct ieee80211com *ic, int nstate)
1381 {
1382 struct ifnet *ifp = &ic->ic_if;
1383
1384 switch (ic->ic_opmode) {
1385 #ifndef IEEE80211_STA_ONLY
1386 case IEEE80211_M_IBSS:
1387 case IEEE80211_M_HOSTAP:
1388 nstate = LINK_STATE_UNKNOWN;
1389 break;
1390 #endif
1391 case IEEE80211_M_MONITOR:
1392 nstate = LINK_STATE_DOWN;
1393 break;
1394 default:
1395 break;
1396 }
1397 if (nstate != ifp->if_link_state) {
1398 #ifdef __FreeBSD_version
1399 if_link_state_change(ifp, nstate);
1400 task_add(systq, &ic->ic_rtm_80211info_task);
1401 #else
1402 ifp->if_link_state = nstate;
1403 if (LINK_STATE_IS_UP(nstate))
1404 task_add(systq, &ic->ic_rtm_80211info_task);
1405 if_link_state_change(ifp);
1406 #endif
1407 }
1408 }
1409