1 /*
2 * hostapd / IEEE 802.11 Management
3 * Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15 #include "utils/includes.h"
16
17 #ifndef CONFIG_NATIVE_WINDOWS
18
19 #include "utils/common.h"
20 #include "utils/eloop.h"
21 #include "crypto/crypto.h"
22 #include "drivers/driver.h"
23 #include "common/ieee802_11_defs.h"
24 #include "common/ieee802_11_common.h"
25 #include "common/wpa_ctrl.h"
26 #include "radius/radius.h"
27 #include "radius/radius_client.h"
28 #include "p2p/p2p.h"
29 #include "wps/wps.h"
30 #include "hostapd.h"
31 #include "beacon.h"
32 #include "ieee802_11_auth.h"
33 #include "sta_info.h"
34 #include "ieee802_1x.h"
35 #include "wpa_auth.h"
36 #include "wmm.h"
37 #include "ap_list.h"
38 #include "accounting.h"
39 #include "ap_config.h"
40 #include "ap_mlme.h"
41 #include "p2p_hostapd.h"
42 #include "ap_drv_ops.h"
43 #include "ieee802_11.h"
44
45
hostapd_eid_supp_rates(struct hostapd_data * hapd,u8 * eid)46 u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid)
47 {
48 u8 *pos = eid;
49 int i, num, count;
50
51 if (hapd->iface->current_rates == NULL)
52 return eid;
53
54 *pos++ = WLAN_EID_SUPP_RATES;
55 num = hapd->iface->num_rates;
56 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
57 num++;
58 if (num > 8) {
59 /* rest of the rates are encoded in Extended supported
60 * rates element */
61 num = 8;
62 }
63
64 *pos++ = num;
65 count = 0;
66 for (i = 0, count = 0; i < hapd->iface->num_rates && count < num;
67 i++) {
68 count++;
69 *pos = hapd->iface->current_rates[i].rate / 5;
70 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
71 *pos |= 0x80;
72 pos++;
73 }
74
75 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht &&
76 hapd->iface->num_rates < 8)
77 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
78
79 return pos;
80 }
81
82
hostapd_eid_ext_supp_rates(struct hostapd_data * hapd,u8 * eid)83 u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid)
84 {
85 u8 *pos = eid;
86 int i, num, count;
87
88 if (hapd->iface->current_rates == NULL)
89 return eid;
90
91 num = hapd->iface->num_rates;
92 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
93 num++;
94 if (num <= 8)
95 return eid;
96 num -= 8;
97
98 *pos++ = WLAN_EID_EXT_SUPP_RATES;
99 *pos++ = num;
100 count = 0;
101 for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8;
102 i++) {
103 count++;
104 if (count <= 8)
105 continue; /* already in SuppRates IE */
106 *pos = hapd->iface->current_rates[i].rate / 5;
107 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
108 *pos |= 0x80;
109 pos++;
110 }
111
112 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht &&
113 hapd->iface->num_rates >= 8)
114 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
115
116 return pos;
117 }
118
119
hostapd_own_capab_info(struct hostapd_data * hapd,struct sta_info * sta,int probe)120 u16 hostapd_own_capab_info(struct hostapd_data *hapd, struct sta_info *sta,
121 int probe)
122 {
123 int capab = WLAN_CAPABILITY_ESS;
124 int privacy;
125
126 if (hapd->iface->num_sta_no_short_preamble == 0 &&
127 hapd->iconf->preamble == SHORT_PREAMBLE)
128 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
129
130 privacy = hapd->conf->ssid.wep.keys_set;
131
132 if (hapd->conf->ieee802_1x &&
133 (hapd->conf->default_wep_key_len ||
134 hapd->conf->individual_wep_key_len))
135 privacy = 1;
136
137 if (hapd->conf->wpa)
138 privacy = 1;
139
140 if (sta) {
141 int policy, def_klen;
142 if (probe && sta->ssid_probe) {
143 policy = sta->ssid_probe->security_policy;
144 def_klen = sta->ssid_probe->wep.default_len;
145 } else {
146 policy = sta->ssid->security_policy;
147 def_klen = sta->ssid->wep.default_len;
148 }
149 privacy = policy != SECURITY_PLAINTEXT;
150 if (policy == SECURITY_IEEE_802_1X && def_klen == 0)
151 privacy = 0;
152 }
153
154 if (privacy)
155 capab |= WLAN_CAPABILITY_PRIVACY;
156
157 if (hapd->iface->current_mode &&
158 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G &&
159 hapd->iface->num_sta_no_short_slot_time == 0)
160 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
161
162 return capab;
163 }
164
165
hostapd_eid_ext_capab(struct hostapd_data * hapd,u8 * eid)166 u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid)
167 {
168 u8 *pos = eid;
169
170 if ((hapd->conf->tdls & (TDLS_PROHIBIT | TDLS_PROHIBIT_CHAN_SWITCH)) ==
171 0)
172 return eid;
173
174 *pos++ = WLAN_EID_EXT_CAPAB;
175 *pos++ = 5;
176 *pos++ = 0x00;
177 *pos++ = 0x00;
178 *pos++ = 0x00;
179 *pos++ = 0x00;
180 *pos = 0x00;
181 if (hapd->conf->tdls & TDLS_PROHIBIT)
182 *pos |= 0x40; /* Bit 38 - TDLS Prohibited */
183 if (hapd->conf->tdls & TDLS_PROHIBIT_CHAN_SWITCH)
184 *pos |= 0x80; /* Bit 39 - TDLS Channel Switching Prohibited */
185 pos++;
186
187 return pos;
188 }
189
190
191 #ifdef CONFIG_IEEE80211W
hostapd_eid_assoc_comeback_time(struct hostapd_data * hapd,struct sta_info * sta,u8 * eid)192 static u8 * hostapd_eid_assoc_comeback_time(struct hostapd_data *hapd,
193 struct sta_info *sta, u8 *eid)
194 {
195 u8 *pos = eid;
196 u32 timeout, tu;
197 struct os_time now, passed;
198
199 *pos++ = WLAN_EID_TIMEOUT_INTERVAL;
200 *pos++ = 5;
201 *pos++ = WLAN_TIMEOUT_ASSOC_COMEBACK;
202 os_get_time(&now);
203 os_time_sub(&now, &sta->sa_query_start, &passed);
204 tu = (passed.sec * 1000000 + passed.usec) / 1024;
205 if (hapd->conf->assoc_sa_query_max_timeout > tu)
206 timeout = hapd->conf->assoc_sa_query_max_timeout - tu;
207 else
208 timeout = 0;
209 if (timeout < hapd->conf->assoc_sa_query_max_timeout)
210 timeout++; /* add some extra time for local timers */
211 WPA_PUT_LE32(pos, timeout);
212 pos += 4;
213
214 return pos;
215 }
216 #endif /* CONFIG_IEEE80211W */
217
218
ieee802_11_print_ssid(char * buf,const u8 * ssid,u8 len)219 void ieee802_11_print_ssid(char *buf, const u8 *ssid, u8 len)
220 {
221 int i;
222 if (len > HOSTAPD_MAX_SSID_LEN)
223 len = HOSTAPD_MAX_SSID_LEN;
224 for (i = 0; i < len; i++) {
225 if (ssid[i] >= 32 && ssid[i] < 127)
226 buf[i] = ssid[i];
227 else
228 buf[i] = '.';
229 }
230 buf[len] = '\0';
231 }
232
233
auth_shared_key(struct hostapd_data * hapd,struct sta_info * sta,u16 auth_transaction,const u8 * challenge,int iswep)234 static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta,
235 u16 auth_transaction, const u8 *challenge,
236 int iswep)
237 {
238 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
239 HOSTAPD_LEVEL_DEBUG,
240 "authentication (shared key, transaction %d)",
241 auth_transaction);
242
243 if (auth_transaction == 1) {
244 if (!sta->challenge) {
245 /* Generate a pseudo-random challenge */
246 u8 key[8];
247 struct os_time now;
248 int r;
249 sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN);
250 if (sta->challenge == NULL)
251 return WLAN_STATUS_UNSPECIFIED_FAILURE;
252
253 os_get_time(&now);
254 r = os_random();
255 os_memcpy(key, &now.sec, 4);
256 os_memcpy(key + 4, &r, 4);
257 rc4_skip(key, sizeof(key), 0,
258 sta->challenge, WLAN_AUTH_CHALLENGE_LEN);
259 }
260 return 0;
261 }
262
263 if (auth_transaction != 3)
264 return WLAN_STATUS_UNSPECIFIED_FAILURE;
265
266 /* Transaction 3 */
267 if (!iswep || !sta->challenge || !challenge ||
268 os_memcmp(sta->challenge, challenge, WLAN_AUTH_CHALLENGE_LEN)) {
269 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
270 HOSTAPD_LEVEL_INFO,
271 "shared key authentication - invalid "
272 "challenge-response");
273 return WLAN_STATUS_CHALLENGE_FAIL;
274 }
275
276 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
277 HOSTAPD_LEVEL_DEBUG,
278 "authentication OK (shared key)");
279 #ifdef IEEE80211_REQUIRE_AUTH_ACK
280 /* Station will be marked authenticated if it ACKs the
281 * authentication reply. */
282 #else
283 sta->flags |= WLAN_STA_AUTH;
284 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
285 #endif
286 os_free(sta->challenge);
287 sta->challenge = NULL;
288
289 return 0;
290 }
291
292
send_auth_reply(struct hostapd_data * hapd,const u8 * dst,const u8 * bssid,u16 auth_alg,u16 auth_transaction,u16 resp,const u8 * ies,size_t ies_len)293 static void send_auth_reply(struct hostapd_data *hapd,
294 const u8 *dst, const u8 *bssid,
295 u16 auth_alg, u16 auth_transaction, u16 resp,
296 const u8 *ies, size_t ies_len)
297 {
298 struct ieee80211_mgmt *reply;
299 u8 *buf;
300 size_t rlen;
301
302 rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len;
303 buf = os_zalloc(rlen);
304 if (buf == NULL)
305 return;
306
307 reply = (struct ieee80211_mgmt *) buf;
308 reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
309 WLAN_FC_STYPE_AUTH);
310 os_memcpy(reply->da, dst, ETH_ALEN);
311 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
312 os_memcpy(reply->bssid, bssid, ETH_ALEN);
313
314 reply->u.auth.auth_alg = host_to_le16(auth_alg);
315 reply->u.auth.auth_transaction = host_to_le16(auth_transaction);
316 reply->u.auth.status_code = host_to_le16(resp);
317
318 if (ies && ies_len)
319 os_memcpy(reply->u.auth.variable, ies, ies_len);
320
321 wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR
322 " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)",
323 MAC2STR(dst), auth_alg, auth_transaction,
324 resp, (unsigned long) ies_len);
325 if (hostapd_drv_send_mlme(hapd, reply, rlen) < 0)
326 perror("send_auth_reply: send");
327
328 os_free(buf);
329 }
330
331
332 #ifdef CONFIG_IEEE80211R
handle_auth_ft_finish(void * ctx,const u8 * dst,const u8 * bssid,u16 auth_transaction,u16 status,const u8 * ies,size_t ies_len)333 static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid,
334 u16 auth_transaction, u16 status,
335 const u8 *ies, size_t ies_len)
336 {
337 struct hostapd_data *hapd = ctx;
338 struct sta_info *sta;
339
340 send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT, auth_transaction,
341 status, ies, ies_len);
342
343 if (status != WLAN_STATUS_SUCCESS)
344 return;
345
346 sta = ap_get_sta(hapd, dst);
347 if (sta == NULL)
348 return;
349
350 hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211,
351 HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)");
352 sta->flags |= WLAN_STA_AUTH;
353 mlme_authenticate_indication(hapd, sta);
354 }
355 #endif /* CONFIG_IEEE80211R */
356
357
handle_auth(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len)358 static void handle_auth(struct hostapd_data *hapd,
359 const struct ieee80211_mgmt *mgmt, size_t len)
360 {
361 u16 auth_alg, auth_transaction, status_code;
362 u16 resp = WLAN_STATUS_SUCCESS;
363 struct sta_info *sta = NULL;
364 int res;
365 u16 fc;
366 const u8 *challenge = NULL;
367 u32 session_timeout, acct_interim_interval;
368 int vlan_id = 0;
369 u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
370 size_t resp_ies_len = 0;
371
372 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
373 printf("handle_auth - too short payload (len=%lu)\n",
374 (unsigned long) len);
375 return;
376 }
377
378 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
379 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
380 status_code = le_to_host16(mgmt->u.auth.status_code);
381 fc = le_to_host16(mgmt->frame_control);
382
383 if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) +
384 2 + WLAN_AUTH_CHALLENGE_LEN &&
385 mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE &&
386 mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN)
387 challenge = &mgmt->u.auth.variable[2];
388
389 wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d "
390 "auth_transaction=%d status_code=%d wep=%d%s",
391 MAC2STR(mgmt->sa), auth_alg, auth_transaction,
392 status_code, !!(fc & WLAN_FC_ISWEP),
393 challenge ? " challenge" : "");
394
395 if (hapd->tkip_countermeasures) {
396 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
397 goto fail;
398 }
399
400 if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) &&
401 auth_alg == WLAN_AUTH_OPEN) ||
402 #ifdef CONFIG_IEEE80211R
403 (hapd->conf->wpa &&
404 (hapd->conf->wpa_key_mgmt &
405 (WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK)) &&
406 auth_alg == WLAN_AUTH_FT) ||
407 #endif /* CONFIG_IEEE80211R */
408 ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) &&
409 auth_alg == WLAN_AUTH_SHARED_KEY))) {
410 printf("Unsupported authentication algorithm (%d)\n",
411 auth_alg);
412 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
413 goto fail;
414 }
415
416 if (!(auth_transaction == 1 ||
417 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
418 printf("Unknown authentication transaction number (%d)\n",
419 auth_transaction);
420 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
421 goto fail;
422 }
423
424 if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
425 printf("Station " MACSTR " not allowed to authenticate.\n",
426 MAC2STR(mgmt->sa));
427 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
428 goto fail;
429 }
430
431 res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len,
432 &session_timeout,
433 &acct_interim_interval, &vlan_id);
434 if (res == HOSTAPD_ACL_REJECT) {
435 printf("Station " MACSTR " not allowed to authenticate.\n",
436 MAC2STR(mgmt->sa));
437 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
438 goto fail;
439 }
440 if (res == HOSTAPD_ACL_PENDING) {
441 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR
442 " waiting for an external authentication",
443 MAC2STR(mgmt->sa));
444 /* Authentication code will re-send the authentication frame
445 * after it has received (and cached) information from the
446 * external source. */
447 return;
448 }
449
450 sta = ap_sta_add(hapd, mgmt->sa);
451 if (!sta) {
452 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
453 goto fail;
454 }
455
456 if (vlan_id > 0) {
457 if (hostapd_get_vlan_id_ifname(hapd->conf->vlan,
458 vlan_id) == NULL) {
459 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
460 HOSTAPD_LEVEL_INFO, "Invalid VLAN ID "
461 "%d received from RADIUS server",
462 vlan_id);
463 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
464 goto fail;
465 }
466 sta->vlan_id = vlan_id;
467 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
468 HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id);
469 }
470
471 sta->flags &= ~WLAN_STA_PREAUTH;
472 ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
473
474 if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval)
475 sta->acct_interim_interval = acct_interim_interval;
476 if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT)
477 ap_sta_session_timeout(hapd, sta, session_timeout);
478 else
479 ap_sta_no_session_timeout(hapd, sta);
480
481 switch (auth_alg) {
482 case WLAN_AUTH_OPEN:
483 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
484 HOSTAPD_LEVEL_DEBUG,
485 "authentication OK (open system)");
486 #ifdef IEEE80211_REQUIRE_AUTH_ACK
487 /* Station will be marked authenticated if it ACKs the
488 * authentication reply. */
489 #else
490 sta->flags |= WLAN_STA_AUTH;
491 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
492 sta->auth_alg = WLAN_AUTH_OPEN;
493 mlme_authenticate_indication(hapd, sta);
494 #endif
495 break;
496 case WLAN_AUTH_SHARED_KEY:
497 resp = auth_shared_key(hapd, sta, auth_transaction, challenge,
498 fc & WLAN_FC_ISWEP);
499 sta->auth_alg = WLAN_AUTH_SHARED_KEY;
500 mlme_authenticate_indication(hapd, sta);
501 if (sta->challenge && auth_transaction == 1) {
502 resp_ies[0] = WLAN_EID_CHALLENGE;
503 resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN;
504 os_memcpy(resp_ies + 2, sta->challenge,
505 WLAN_AUTH_CHALLENGE_LEN);
506 resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN;
507 }
508 break;
509 #ifdef CONFIG_IEEE80211R
510 case WLAN_AUTH_FT:
511 sta->auth_alg = WLAN_AUTH_FT;
512 if (sta->wpa_sm == NULL)
513 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
514 sta->addr);
515 if (sta->wpa_sm == NULL) {
516 wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA "
517 "state machine");
518 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
519 goto fail;
520 }
521 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid,
522 auth_transaction, mgmt->u.auth.variable,
523 len - IEEE80211_HDRLEN -
524 sizeof(mgmt->u.auth),
525 handle_auth_ft_finish, hapd);
526 /* handle_auth_ft_finish() callback will complete auth. */
527 return;
528 #endif /* CONFIG_IEEE80211R */
529 }
530
531 fail:
532 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg,
533 auth_transaction + 1, resp, resp_ies, resp_ies_len);
534 }
535
536
hostapd_get_aid(struct hostapd_data * hapd,struct sta_info * sta)537 static int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta)
538 {
539 int i, j = 32, aid;
540
541 /* get a unique AID */
542 if (sta->aid > 0) {
543 wpa_printf(MSG_DEBUG, " old AID %d", sta->aid);
544 return 0;
545 }
546
547 for (i = 0; i < AID_WORDS; i++) {
548 if (hapd->sta_aid[i] == (u32) -1)
549 continue;
550 for (j = 0; j < 32; j++) {
551 if (!(hapd->sta_aid[i] & BIT(j)))
552 break;
553 }
554 if (j < 32)
555 break;
556 }
557 if (j == 32)
558 return -1;
559 aid = i * 32 + j + 1;
560 if (aid > 2007)
561 return -1;
562
563 sta->aid = aid;
564 hapd->sta_aid[i] |= BIT(j);
565 wpa_printf(MSG_DEBUG, " new AID %d", sta->aid);
566 return 0;
567 }
568
569
check_ssid(struct hostapd_data * hapd,struct sta_info * sta,const u8 * ssid_ie,size_t ssid_ie_len)570 static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta,
571 const u8 *ssid_ie, size_t ssid_ie_len)
572 {
573 if (ssid_ie == NULL)
574 return WLAN_STATUS_UNSPECIFIED_FAILURE;
575
576 if (ssid_ie_len != hapd->conf->ssid.ssid_len ||
577 os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) {
578 char ssid_txt[33];
579 ieee802_11_print_ssid(ssid_txt, ssid_ie, ssid_ie_len);
580 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
581 HOSTAPD_LEVEL_INFO,
582 "Station tried to associate with unknown SSID "
583 "'%s'", ssid_txt);
584 return WLAN_STATUS_UNSPECIFIED_FAILURE;
585 }
586
587 return WLAN_STATUS_SUCCESS;
588 }
589
590
check_wmm(struct hostapd_data * hapd,struct sta_info * sta,const u8 * wmm_ie,size_t wmm_ie_len)591 static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta,
592 const u8 *wmm_ie, size_t wmm_ie_len)
593 {
594 sta->flags &= ~WLAN_STA_WMM;
595 if (wmm_ie && hapd->conf->wmm_enabled) {
596 if (hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len))
597 hostapd_logger(hapd, sta->addr,
598 HOSTAPD_MODULE_WPA,
599 HOSTAPD_LEVEL_DEBUG,
600 "invalid WMM element in association "
601 "request");
602 else
603 sta->flags |= WLAN_STA_WMM;
604 }
605 return WLAN_STATUS_SUCCESS;
606 }
607
608
copy_supp_rates(struct hostapd_data * hapd,struct sta_info * sta,struct ieee802_11_elems * elems)609 static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta,
610 struct ieee802_11_elems *elems)
611 {
612 if (!elems->supp_rates) {
613 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
614 HOSTAPD_LEVEL_DEBUG,
615 "No supported rates element in AssocReq");
616 return WLAN_STATUS_UNSPECIFIED_FAILURE;
617 }
618
619 if (elems->supp_rates_len > sizeof(sta->supported_rates)) {
620 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
621 HOSTAPD_LEVEL_DEBUG,
622 "Invalid supported rates element length %d",
623 elems->supp_rates_len);
624 return WLAN_STATUS_UNSPECIFIED_FAILURE;
625 }
626
627 os_memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
628 os_memcpy(sta->supported_rates, elems->supp_rates,
629 elems->supp_rates_len);
630 sta->supported_rates_len = elems->supp_rates_len;
631
632 if (elems->ext_supp_rates) {
633 if (elems->supp_rates_len + elems->ext_supp_rates_len >
634 sizeof(sta->supported_rates)) {
635 hostapd_logger(hapd, sta->addr,
636 HOSTAPD_MODULE_IEEE80211,
637 HOSTAPD_LEVEL_DEBUG,
638 "Invalid supported rates element length"
639 " %d+%d", elems->supp_rates_len,
640 elems->ext_supp_rates_len);
641 return WLAN_STATUS_UNSPECIFIED_FAILURE;
642 }
643
644 os_memcpy(sta->supported_rates + elems->supp_rates_len,
645 elems->ext_supp_rates, elems->ext_supp_rates_len);
646 sta->supported_rates_len += elems->ext_supp_rates_len;
647 }
648
649 return WLAN_STATUS_SUCCESS;
650 }
651
652
check_assoc_ies(struct hostapd_data * hapd,struct sta_info * sta,const u8 * ies,size_t ies_len,int reassoc)653 static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta,
654 const u8 *ies, size_t ies_len, int reassoc)
655 {
656 struct ieee802_11_elems elems;
657 u16 resp;
658 const u8 *wpa_ie;
659 size_t wpa_ie_len;
660
661 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
662 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
663 HOSTAPD_LEVEL_INFO, "Station sent an invalid "
664 "association request");
665 return WLAN_STATUS_UNSPECIFIED_FAILURE;
666 }
667
668 resp = check_ssid(hapd, sta, elems.ssid, elems.ssid_len);
669 if (resp != WLAN_STATUS_SUCCESS)
670 return resp;
671 resp = check_wmm(hapd, sta, elems.wmm, elems.wmm_len);
672 if (resp != WLAN_STATUS_SUCCESS)
673 return resp;
674 resp = copy_supp_rates(hapd, sta, &elems);
675 if (resp != WLAN_STATUS_SUCCESS)
676 return resp;
677 #ifdef CONFIG_IEEE80211N
678 resp = copy_sta_ht_capab(hapd, sta, elems.ht_capabilities,
679 elems.ht_capabilities_len);
680 if (resp != WLAN_STATUS_SUCCESS)
681 return resp;
682 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht &&
683 !(sta->flags & WLAN_STA_HT)) {
684 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
685 HOSTAPD_LEVEL_INFO, "Station does not support "
686 "mandatory HT PHY - reject association");
687 return WLAN_STATUS_ASSOC_DENIED_NO_HT;
688 }
689 #endif /* CONFIG_IEEE80211N */
690
691 if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) {
692 wpa_ie = elems.rsn_ie;
693 wpa_ie_len = elems.rsn_ie_len;
694 } else if ((hapd->conf->wpa & WPA_PROTO_WPA) &&
695 elems.wpa_ie) {
696 wpa_ie = elems.wpa_ie;
697 wpa_ie_len = elems.wpa_ie_len;
698 } else {
699 wpa_ie = NULL;
700 wpa_ie_len = 0;
701 }
702
703 #ifdef CONFIG_WPS
704 sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS);
705 if (hapd->conf->wps_state && elems.wps_ie) {
706 wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)Association "
707 "Request - assume WPS is used");
708 sta->flags |= WLAN_STA_WPS;
709 wpabuf_free(sta->wps_ie);
710 sta->wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
711 WPS_IE_VENDOR_TYPE);
712 wpa_ie = NULL;
713 wpa_ie_len = 0;
714 if (sta->wps_ie && wps_validate_assoc_req(sta->wps_ie) < 0) {
715 wpa_printf(MSG_DEBUG, "WPS: Invalid WPS IE in "
716 "(Re)Association Request - reject");
717 return WLAN_STATUS_INVALID_IE;
718 }
719 } else if (hapd->conf->wps_state && wpa_ie == NULL) {
720 wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE in "
721 "(Re)Association Request - possible WPS use");
722 sta->flags |= WLAN_STA_MAYBE_WPS;
723 } else
724 #endif /* CONFIG_WPS */
725 if (hapd->conf->wpa && wpa_ie == NULL) {
726 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
727 HOSTAPD_LEVEL_INFO,
728 "No WPA/RSN IE in association request");
729 return WLAN_STATUS_INVALID_IE;
730 }
731
732 if (hapd->conf->wpa && wpa_ie) {
733 int res;
734 wpa_ie -= 2;
735 wpa_ie_len += 2;
736 if (sta->wpa_sm == NULL)
737 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
738 sta->addr);
739 if (sta->wpa_sm == NULL) {
740 wpa_printf(MSG_WARNING, "Failed to initialize WPA "
741 "state machine");
742 return WLAN_STATUS_UNSPECIFIED_FAILURE;
743 }
744 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
745 wpa_ie, wpa_ie_len,
746 elems.mdie, elems.mdie_len);
747 if (res == WPA_INVALID_GROUP)
748 resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
749 else if (res == WPA_INVALID_PAIRWISE)
750 resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
751 else if (res == WPA_INVALID_AKMP)
752 resp = WLAN_STATUS_AKMP_NOT_VALID;
753 else if (res == WPA_ALLOC_FAIL)
754 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
755 #ifdef CONFIG_IEEE80211W
756 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
757 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
758 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
759 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
760 #endif /* CONFIG_IEEE80211W */
761 else if (res == WPA_INVALID_MDIE)
762 resp = WLAN_STATUS_INVALID_MDIE;
763 else if (res != WPA_IE_OK)
764 resp = WLAN_STATUS_INVALID_IE;
765 if (resp != WLAN_STATUS_SUCCESS)
766 return resp;
767 #ifdef CONFIG_IEEE80211W
768 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
769 sta->sa_query_count > 0)
770 ap_check_sa_query_timeout(hapd, sta);
771 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
772 (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) {
773 /*
774 * STA has already been associated with MFP and SA
775 * Query timeout has not been reached. Reject the
776 * association attempt temporarily and start SA Query,
777 * if one is not pending.
778 */
779
780 if (sta->sa_query_count == 0)
781 ap_sta_start_sa_query(hapd, sta);
782
783 return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;
784 }
785
786 if (wpa_auth_uses_mfp(sta->wpa_sm))
787 sta->flags |= WLAN_STA_MFP;
788 else
789 sta->flags &= ~WLAN_STA_MFP;
790 #endif /* CONFIG_IEEE80211W */
791
792 #ifdef CONFIG_IEEE80211R
793 if (sta->auth_alg == WLAN_AUTH_FT) {
794 if (!reassoc) {
795 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried "
796 "to use association (not "
797 "re-association) with FT auth_alg",
798 MAC2STR(sta->addr));
799 return WLAN_STATUS_UNSPECIFIED_FAILURE;
800 }
801
802 resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies,
803 ies_len);
804 if (resp != WLAN_STATUS_SUCCESS)
805 return resp;
806 }
807 #endif /* CONFIG_IEEE80211R */
808
809 #ifdef CONFIG_IEEE80211N
810 if ((sta->flags & WLAN_STA_HT) &&
811 wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) {
812 hostapd_logger(hapd, sta->addr,
813 HOSTAPD_MODULE_IEEE80211,
814 HOSTAPD_LEVEL_INFO,
815 "Station tried to use TKIP with HT "
816 "association");
817 return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY;
818 }
819 #endif /* CONFIG_IEEE80211N */
820 } else
821 wpa_auth_sta_no_wpa(sta->wpa_sm);
822
823 #ifdef CONFIG_P2P
824 if (elems.p2p) {
825 wpabuf_free(sta->p2p_ie);
826 sta->p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
827 P2P_IE_VENDOR_TYPE);
828
829 } else {
830 wpabuf_free(sta->p2p_ie);
831 sta->p2p_ie = NULL;
832 }
833
834 p2p_group_notif_assoc(hapd->p2p_group, sta->addr, ies, ies_len);
835 #endif /* CONFIG_P2P */
836
837 return WLAN_STATUS_SUCCESS;
838 }
839
840
send_deauth(struct hostapd_data * hapd,const u8 * addr,u16 reason_code)841 static void send_deauth(struct hostapd_data *hapd, const u8 *addr,
842 u16 reason_code)
843 {
844 int send_len;
845 struct ieee80211_mgmt reply;
846
847 os_memset(&reply, 0, sizeof(reply));
848 reply.frame_control =
849 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH);
850 os_memcpy(reply.da, addr, ETH_ALEN);
851 os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN);
852 os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN);
853
854 send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth);
855 reply.u.deauth.reason_code = host_to_le16(reason_code);
856
857 if (hostapd_drv_send_mlme(hapd, &reply, send_len) < 0)
858 wpa_printf(MSG_INFO, "Failed to send deauth: %s",
859 strerror(errno));
860 }
861
862
send_assoc_resp(struct hostapd_data * hapd,struct sta_info * sta,u16 status_code,int reassoc,const u8 * ies,size_t ies_len)863 static void send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta,
864 u16 status_code, int reassoc, const u8 *ies,
865 size_t ies_len)
866 {
867 int send_len;
868 u8 buf[sizeof(struct ieee80211_mgmt) + 1024];
869 struct ieee80211_mgmt *reply;
870 u8 *p;
871
872 os_memset(buf, 0, sizeof(buf));
873 reply = (struct ieee80211_mgmt *) buf;
874 reply->frame_control =
875 IEEE80211_FC(WLAN_FC_TYPE_MGMT,
876 (reassoc ? WLAN_FC_STYPE_REASSOC_RESP :
877 WLAN_FC_STYPE_ASSOC_RESP));
878 os_memcpy(reply->da, sta->addr, ETH_ALEN);
879 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
880 os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN);
881
882 send_len = IEEE80211_HDRLEN;
883 send_len += sizeof(reply->u.assoc_resp);
884 reply->u.assoc_resp.capab_info =
885 host_to_le16(hostapd_own_capab_info(hapd, sta, 0));
886 reply->u.assoc_resp.status_code = host_to_le16(status_code);
887 reply->u.assoc_resp.aid = host_to_le16((sta ? sta->aid : 0)
888 | BIT(14) | BIT(15));
889 /* Supported rates */
890 p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable);
891 /* Extended supported rates */
892 p = hostapd_eid_ext_supp_rates(hapd, p);
893
894 #ifdef CONFIG_IEEE80211R
895 if (status_code == WLAN_STATUS_SUCCESS) {
896 /* IEEE 802.11r: Mobility Domain Information, Fast BSS
897 * Transition Information, RSN, [RIC Response] */
898 p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p,
899 buf + sizeof(buf) - p,
900 sta->auth_alg, ies, ies_len);
901 }
902 #endif /* CONFIG_IEEE80211R */
903
904 #ifdef CONFIG_IEEE80211W
905 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY)
906 p = hostapd_eid_assoc_comeback_time(hapd, sta, p);
907 #endif /* CONFIG_IEEE80211W */
908
909 #ifdef CONFIG_IEEE80211N
910 p = hostapd_eid_ht_capabilities(hapd, p);
911 p = hostapd_eid_ht_operation(hapd, p);
912 #endif /* CONFIG_IEEE80211N */
913
914 p = hostapd_eid_ext_capab(hapd, p);
915
916 if (sta->flags & WLAN_STA_WMM)
917 p = hostapd_eid_wmm(hapd, p);
918
919 #ifdef CONFIG_WPS
920 if (sta->flags & WLAN_STA_WPS) {
921 struct wpabuf *wps = wps_build_assoc_resp_ie();
922 if (wps) {
923 os_memcpy(p, wpabuf_head(wps), wpabuf_len(wps));
924 p += wpabuf_len(wps);
925 wpabuf_free(wps);
926 }
927 }
928 #endif /* CONFIG_WPS */
929
930 #ifdef CONFIG_P2P
931 if (sta->p2p_ie) {
932 struct wpabuf *p2p_resp_ie;
933 enum p2p_status_code status;
934 switch (status_code) {
935 case WLAN_STATUS_SUCCESS:
936 status = P2P_SC_SUCCESS;
937 break;
938 case WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA:
939 status = P2P_SC_FAIL_LIMIT_REACHED;
940 break;
941 default:
942 status = P2P_SC_FAIL_INVALID_PARAMS;
943 break;
944 }
945 p2p_resp_ie = p2p_group_assoc_resp_ie(hapd->p2p_group, status);
946 if (p2p_resp_ie) {
947 os_memcpy(p, wpabuf_head(p2p_resp_ie),
948 wpabuf_len(p2p_resp_ie));
949 p += wpabuf_len(p2p_resp_ie);
950 wpabuf_free(p2p_resp_ie);
951 }
952 }
953 #endif /* CONFIG_P2P */
954
955 #ifdef CONFIG_P2P_MANAGER
956 if (hapd->conf->p2p & P2P_MANAGE)
957 p = hostapd_eid_p2p_manage(hapd, p);
958 #endif /* CONFIG_P2P_MANAGER */
959
960 send_len += p - reply->u.assoc_resp.variable;
961
962 if (hostapd_drv_send_mlme(hapd, reply, send_len) < 0)
963 wpa_printf(MSG_INFO, "Failed to send assoc resp: %s",
964 strerror(errno));
965 }
966
967
handle_assoc(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int reassoc)968 static void handle_assoc(struct hostapd_data *hapd,
969 const struct ieee80211_mgmt *mgmt, size_t len,
970 int reassoc)
971 {
972 u16 capab_info, listen_interval;
973 u16 resp = WLAN_STATUS_SUCCESS;
974 const u8 *pos;
975 int left, i;
976 struct sta_info *sta;
977
978 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) :
979 sizeof(mgmt->u.assoc_req))) {
980 printf("handle_assoc(reassoc=%d) - too short payload (len=%lu)"
981 "\n", reassoc, (unsigned long) len);
982 return;
983 }
984
985 if (reassoc) {
986 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info);
987 listen_interval = le_to_host16(
988 mgmt->u.reassoc_req.listen_interval);
989 wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR
990 " capab_info=0x%02x listen_interval=%d current_ap="
991 MACSTR,
992 MAC2STR(mgmt->sa), capab_info, listen_interval,
993 MAC2STR(mgmt->u.reassoc_req.current_ap));
994 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req));
995 pos = mgmt->u.reassoc_req.variable;
996 } else {
997 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info);
998 listen_interval = le_to_host16(
999 mgmt->u.assoc_req.listen_interval);
1000 wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR
1001 " capab_info=0x%02x listen_interval=%d",
1002 MAC2STR(mgmt->sa), capab_info, listen_interval);
1003 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req));
1004 pos = mgmt->u.assoc_req.variable;
1005 }
1006
1007 sta = ap_get_sta(hapd, mgmt->sa);
1008 #ifdef CONFIG_IEEE80211R
1009 if (sta && sta->auth_alg == WLAN_AUTH_FT &&
1010 (sta->flags & WLAN_STA_AUTH) == 0) {
1011 wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate "
1012 "prior to authentication since it is using "
1013 "over-the-DS FT", MAC2STR(mgmt->sa));
1014 } else
1015 #endif /* CONFIG_IEEE80211R */
1016 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1017 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1018 HOSTAPD_LEVEL_INFO, "Station tried to "
1019 "associate before authentication "
1020 "(aid=%d flags=0x%x)",
1021 sta ? sta->aid : -1,
1022 sta ? sta->flags : 0);
1023 send_deauth(hapd, mgmt->sa,
1024 WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA);
1025 return;
1026 }
1027
1028 if (hapd->tkip_countermeasures) {
1029 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
1030 goto fail;
1031 }
1032
1033 if (listen_interval > hapd->conf->max_listen_interval) {
1034 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1035 HOSTAPD_LEVEL_DEBUG,
1036 "Too large Listen Interval (%d)",
1037 listen_interval);
1038 resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE;
1039 goto fail;
1040 }
1041
1042 /* followed by SSID and Supported rates; and HT capabilities if 802.11n
1043 * is used */
1044 resp = check_assoc_ies(hapd, sta, pos, left, reassoc);
1045 if (resp != WLAN_STATUS_SUCCESS)
1046 goto fail;
1047
1048 if (hostapd_get_aid(hapd, sta) < 0) {
1049 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1050 HOSTAPD_LEVEL_INFO, "No room for more AIDs");
1051 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1052 goto fail;
1053 }
1054
1055 sta->capability = capab_info;
1056 sta->listen_interval = listen_interval;
1057
1058 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1059 sta->flags |= WLAN_STA_NONERP;
1060 for (i = 0; i < sta->supported_rates_len; i++) {
1061 if ((sta->supported_rates[i] & 0x7f) > 22) {
1062 sta->flags &= ~WLAN_STA_NONERP;
1063 break;
1064 }
1065 }
1066 if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) {
1067 sta->nonerp_set = 1;
1068 hapd->iface->num_sta_non_erp++;
1069 if (hapd->iface->num_sta_non_erp == 1)
1070 ieee802_11_set_beacons(hapd->iface);
1071 }
1072
1073 if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) &&
1074 !sta->no_short_slot_time_set) {
1075 sta->no_short_slot_time_set = 1;
1076 hapd->iface->num_sta_no_short_slot_time++;
1077 if (hapd->iface->current_mode->mode ==
1078 HOSTAPD_MODE_IEEE80211G &&
1079 hapd->iface->num_sta_no_short_slot_time == 1)
1080 ieee802_11_set_beacons(hapd->iface);
1081 }
1082
1083 if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
1084 sta->flags |= WLAN_STA_SHORT_PREAMBLE;
1085 else
1086 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
1087
1088 if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) &&
1089 !sta->no_short_preamble_set) {
1090 sta->no_short_preamble_set = 1;
1091 hapd->iface->num_sta_no_short_preamble++;
1092 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
1093 && hapd->iface->num_sta_no_short_preamble == 1)
1094 ieee802_11_set_beacons(hapd->iface);
1095 }
1096
1097 #ifdef CONFIG_IEEE80211N
1098 update_ht_state(hapd, sta);
1099 #endif /* CONFIG_IEEE80211N */
1100
1101 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1102 HOSTAPD_LEVEL_DEBUG,
1103 "association OK (aid %d)", sta->aid);
1104 /* Station will be marked associated, after it acknowledges AssocResp
1105 */
1106 sta->flags |= WLAN_STA_ASSOC_REQ_OK;
1107
1108 #ifdef CONFIG_IEEE80211W
1109 if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) {
1110 wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out "
1111 "SA Query procedure", reassoc ? "re" : "");
1112 /* TODO: Send a protected Disassociate frame to the STA using
1113 * the old key and Reason Code "Previous Authentication no
1114 * longer valid". Make sure this is only sent protected since
1115 * unprotected frame would be received by the STA that is now
1116 * trying to associate.
1117 */
1118 }
1119 #endif /* CONFIG_IEEE80211W */
1120
1121 if (reassoc) {
1122 os_memcpy(sta->previous_ap, mgmt->u.reassoc_req.current_ap,
1123 ETH_ALEN);
1124 }
1125
1126 if (sta->last_assoc_req)
1127 os_free(sta->last_assoc_req);
1128 sta->last_assoc_req = os_malloc(len);
1129 if (sta->last_assoc_req)
1130 os_memcpy(sta->last_assoc_req, mgmt, len);
1131
1132 /* Make sure that the previously registered inactivity timer will not
1133 * remove the STA immediately. */
1134 sta->timeout_next = STA_NULLFUNC;
1135
1136 fail:
1137 send_assoc_resp(hapd, sta, resp, reassoc, pos, left);
1138 }
1139
1140
handle_disassoc(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len)1141 static void handle_disassoc(struct hostapd_data *hapd,
1142 const struct ieee80211_mgmt *mgmt, size_t len)
1143 {
1144 struct sta_info *sta;
1145
1146 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) {
1147 printf("handle_disassoc - too short payload (len=%lu)\n",
1148 (unsigned long) len);
1149 return;
1150 }
1151
1152 wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d",
1153 MAC2STR(mgmt->sa),
1154 le_to_host16(mgmt->u.disassoc.reason_code));
1155
1156 sta = ap_get_sta(hapd, mgmt->sa);
1157 if (sta == NULL) {
1158 printf("Station " MACSTR " trying to disassociate, but it "
1159 "is not associated.\n", MAC2STR(mgmt->sa));
1160 return;
1161 }
1162
1163 sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK);
1164 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED MACSTR,
1165 MAC2STR(sta->addr));
1166 #ifdef ANDROID_BRCM_P2P_PATCH
1167 if(hapd->msg_ctx_parent)
1168 wpa_msg(hapd->msg_ctx_parent, MSG_INFO, AP_STA_DISCONNECTED MACSTR,
1169 MAC2STR(sta->addr));
1170 #endif /* ANDROID_BRCM_P2P_PATCH */
1171
1172 wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
1173 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1174 HOSTAPD_LEVEL_INFO, "disassociated");
1175 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1176 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1177 /* Stop Accounting and IEEE 802.1X sessions, but leave the STA
1178 * authenticated. */
1179 accounting_sta_stop(hapd, sta);
1180 ieee802_1x_free_station(sta);
1181 hostapd_drv_sta_remove(hapd, sta->addr);
1182
1183 if (sta->timeout_next == STA_NULLFUNC ||
1184 sta->timeout_next == STA_DISASSOC) {
1185 sta->timeout_next = STA_DEAUTH;
1186 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
1187 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
1188 hapd, sta);
1189 }
1190
1191 mlme_disassociate_indication(
1192 hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code));
1193 }
1194
1195
handle_deauth(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len)1196 static void handle_deauth(struct hostapd_data *hapd,
1197 const struct ieee80211_mgmt *mgmt, size_t len)
1198 {
1199 struct sta_info *sta;
1200
1201 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) {
1202 wpa_msg(hapd, MSG_DEBUG, "handle_deauth - too short payload "
1203 "(len=%lu)", (unsigned long) len);
1204 return;
1205 }
1206
1207 wpa_msg(hapd, MSG_DEBUG, "deauthentication: STA=" MACSTR
1208 " reason_code=%d",
1209 MAC2STR(mgmt->sa), le_to_host16(mgmt->u.deauth.reason_code));
1210
1211 sta = ap_get_sta(hapd, mgmt->sa);
1212 if (sta == NULL) {
1213 wpa_msg(hapd, MSG_DEBUG, "Station " MACSTR " trying to "
1214 "deauthenticate, but it is not authenticated",
1215 MAC2STR(mgmt->sa));
1216 return;
1217 }
1218
1219 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
1220 WLAN_STA_ASSOC_REQ_OK);
1221 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED MACSTR,
1222 MAC2STR(sta->addr));
1223 #ifdef ANDROID_BRCM_P2P_PATCH
1224 if(hapd->msg_ctx_parent)
1225 wpa_msg(hapd->msg_ctx_parent, MSG_INFO, AP_STA_DISCONNECTED MACSTR,
1226 MAC2STR(sta->addr));
1227 #endif /* ANDROID_BRCM_P2P_PATCH */
1228 wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
1229 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1230 HOSTAPD_LEVEL_DEBUG, "deauthenticated");
1231 mlme_deauthenticate_indication(
1232 hapd, sta, le_to_host16(mgmt->u.deauth.reason_code));
1233 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1234 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1235 ap_free_sta(hapd, sta);
1236 }
1237
1238
handle_beacon(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,struct hostapd_frame_info * fi)1239 static void handle_beacon(struct hostapd_data *hapd,
1240 const struct ieee80211_mgmt *mgmt, size_t len,
1241 struct hostapd_frame_info *fi)
1242 {
1243 struct ieee802_11_elems elems;
1244
1245 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) {
1246 printf("handle_beacon - too short payload (len=%lu)\n",
1247 (unsigned long) len);
1248 return;
1249 }
1250
1251 (void) ieee802_11_parse_elems(mgmt->u.beacon.variable,
1252 len - (IEEE80211_HDRLEN +
1253 sizeof(mgmt->u.beacon)), &elems,
1254 0);
1255
1256 ap_list_process_beacon(hapd->iface, mgmt, &elems, fi);
1257 }
1258
1259
1260 #ifdef CONFIG_IEEE80211W
1261
1262 /* MLME-SAQuery.request */
ieee802_11_send_sa_query_req(struct hostapd_data * hapd,const u8 * addr,const u8 * trans_id)1263 void ieee802_11_send_sa_query_req(struct hostapd_data *hapd,
1264 const u8 *addr, const u8 *trans_id)
1265 {
1266 struct ieee80211_mgmt mgmt;
1267 u8 *end;
1268
1269 wpa_printf(MSG_DEBUG, "IEEE 802.11: Sending SA Query Request to "
1270 MACSTR, MAC2STR(addr));
1271 wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID",
1272 trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1273
1274 os_memset(&mgmt, 0, sizeof(mgmt));
1275 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1276 WLAN_FC_STYPE_ACTION);
1277 os_memcpy(mgmt.da, addr, ETH_ALEN);
1278 os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
1279 os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
1280 mgmt.u.action.category = WLAN_ACTION_SA_QUERY;
1281 mgmt.u.action.u.sa_query_req.action = WLAN_SA_QUERY_REQUEST;
1282 os_memcpy(mgmt.u.action.u.sa_query_req.trans_id, trans_id,
1283 WLAN_SA_QUERY_TR_ID_LEN);
1284 end = mgmt.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN;
1285 if (hostapd_drv_send_mlme(hapd, &mgmt, end - (u8 *) &mgmt) < 0)
1286 perror("ieee802_11_send_sa_query_req: send");
1287 }
1288
1289
hostapd_sa_query_request(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt)1290 static void hostapd_sa_query_request(struct hostapd_data *hapd,
1291 const struct ieee80211_mgmt *mgmt)
1292 {
1293 struct sta_info *sta;
1294 struct ieee80211_mgmt resp;
1295 u8 *end;
1296
1297 wpa_printf(MSG_DEBUG, "IEEE 802.11: Received SA Query Request from "
1298 MACSTR, MAC2STR(mgmt->sa));
1299 wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID",
1300 mgmt->u.action.u.sa_query_resp.trans_id,
1301 WLAN_SA_QUERY_TR_ID_LEN);
1302
1303 sta = ap_get_sta(hapd, mgmt->sa);
1304 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
1305 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignore SA Query Request "
1306 "from unassociated STA " MACSTR, MAC2STR(mgmt->sa));
1307 return;
1308 }
1309
1310 wpa_printf(MSG_DEBUG, "IEEE 802.11: Sending SA Query Response to "
1311 MACSTR, MAC2STR(mgmt->sa));
1312
1313 os_memset(&resp, 0, sizeof(resp));
1314 resp.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1315 WLAN_FC_STYPE_ACTION);
1316 os_memcpy(resp.da, mgmt->sa, ETH_ALEN);
1317 os_memcpy(resp.sa, hapd->own_addr, ETH_ALEN);
1318 os_memcpy(resp.bssid, hapd->own_addr, ETH_ALEN);
1319 resp.u.action.category = WLAN_ACTION_SA_QUERY;
1320 resp.u.action.u.sa_query_req.action = WLAN_SA_QUERY_RESPONSE;
1321 os_memcpy(resp.u.action.u.sa_query_req.trans_id,
1322 mgmt->u.action.u.sa_query_req.trans_id,
1323 WLAN_SA_QUERY_TR_ID_LEN);
1324 end = resp.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN;
1325 if (hostapd_drv_send_mlme(hapd, &resp, end - (u8 *) &resp) < 0)
1326 perror("hostapd_sa_query_request: send");
1327 }
1328
1329
hostapd_sa_query_action(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len)1330 static void hostapd_sa_query_action(struct hostapd_data *hapd,
1331 const struct ieee80211_mgmt *mgmt,
1332 size_t len)
1333 {
1334 struct sta_info *sta;
1335 const u8 *end;
1336 int i;
1337
1338 end = mgmt->u.action.u.sa_query_resp.trans_id +
1339 WLAN_SA_QUERY_TR_ID_LEN;
1340 if (((u8 *) mgmt) + len < end) {
1341 wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short SA Query Action "
1342 "frame (len=%lu)", (unsigned long) len);
1343 return;
1344 }
1345
1346 if (mgmt->u.action.u.sa_query_resp.action == WLAN_SA_QUERY_REQUEST) {
1347 hostapd_sa_query_request(hapd, mgmt);
1348 return;
1349 }
1350
1351 if (mgmt->u.action.u.sa_query_resp.action != WLAN_SA_QUERY_RESPONSE) {
1352 wpa_printf(MSG_DEBUG, "IEEE 802.11: Unexpected SA Query "
1353 "Action %d", mgmt->u.action.u.sa_query_resp.action);
1354 return;
1355 }
1356
1357 wpa_printf(MSG_DEBUG, "IEEE 802.11: Received SA Query Response from "
1358 MACSTR, MAC2STR(mgmt->sa));
1359 wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID",
1360 mgmt->u.action.u.sa_query_resp.trans_id,
1361 WLAN_SA_QUERY_TR_ID_LEN);
1362
1363 /* MLME-SAQuery.confirm */
1364
1365 sta = ap_get_sta(hapd, mgmt->sa);
1366 if (sta == NULL || sta->sa_query_trans_id == NULL) {
1367 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching STA with "
1368 "pending SA Query request found");
1369 return;
1370 }
1371
1372 for (i = 0; i < sta->sa_query_count; i++) {
1373 if (os_memcmp(sta->sa_query_trans_id +
1374 i * WLAN_SA_QUERY_TR_ID_LEN,
1375 mgmt->u.action.u.sa_query_resp.trans_id,
1376 WLAN_SA_QUERY_TR_ID_LEN) == 0)
1377 break;
1378 }
1379
1380 if (i >= sta->sa_query_count) {
1381 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching SA Query "
1382 "transaction identifier found");
1383 return;
1384 }
1385
1386 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1387 HOSTAPD_LEVEL_DEBUG,
1388 "Reply to pending SA Query received");
1389 ap_sta_stop_sa_query(hapd, sta);
1390 }
1391
1392
robust_action_frame(u8 category)1393 static int robust_action_frame(u8 category)
1394 {
1395 return category != WLAN_ACTION_PUBLIC &&
1396 category != WLAN_ACTION_HT;
1397 }
1398 #endif /* CONFIG_IEEE80211W */
1399
1400
handle_action(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len)1401 static void handle_action(struct hostapd_data *hapd,
1402 const struct ieee80211_mgmt *mgmt, size_t len)
1403 {
1404 struct sta_info *sta;
1405
1406 if (len < IEEE80211_HDRLEN + 1) {
1407 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1408 HOSTAPD_LEVEL_DEBUG,
1409 "handle_action - too short payload (len=%lu)",
1410 (unsigned long) len);
1411 return;
1412 }
1413
1414 sta = ap_get_sta(hapd, mgmt->sa);
1415 #ifdef CONFIG_IEEE80211W
1416 if (sta && (sta->flags & WLAN_STA_MFP) &&
1417 !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP) &&
1418 robust_action_frame(mgmt->u.action.category))) {
1419 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1420 HOSTAPD_LEVEL_DEBUG,
1421 "Dropped unprotected Robust Action frame from "
1422 "an MFP STA");
1423 return;
1424 }
1425 #endif /* CONFIG_IEEE80211W */
1426
1427 switch (mgmt->u.action.category) {
1428 #ifdef CONFIG_IEEE80211R
1429 case WLAN_ACTION_FT:
1430 {
1431 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
1432 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored FT Action "
1433 "frame from unassociated STA " MACSTR,
1434 MAC2STR(mgmt->sa));
1435 return;
1436 }
1437
1438 if (wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action,
1439 len - IEEE80211_HDRLEN))
1440 break;
1441
1442 return;
1443 }
1444 #endif /* CONFIG_IEEE80211R */
1445 case WLAN_ACTION_WMM:
1446 hostapd_wmm_action(hapd, mgmt, len);
1447 return;
1448 #ifdef CONFIG_IEEE80211W
1449 case WLAN_ACTION_SA_QUERY:
1450 hostapd_sa_query_action(hapd, mgmt, len);
1451 return;
1452 #endif /* CONFIG_IEEE80211W */
1453 case WLAN_ACTION_PUBLIC:
1454 if (hapd->public_action_cb) {
1455 hapd->public_action_cb(hapd->public_action_cb_ctx,
1456 (u8 *) mgmt, len,
1457 hapd->iface->freq);
1458 return;
1459 }
1460 break;
1461 case WLAN_ACTION_VENDOR_SPECIFIC:
1462 if (hapd->vendor_action_cb) {
1463 if (hapd->vendor_action_cb(hapd->vendor_action_cb_ctx,
1464 (u8 *) mgmt, len,
1465 hapd->iface->freq) == 0)
1466 return;
1467 }
1468 break;
1469 }
1470
1471 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1472 HOSTAPD_LEVEL_DEBUG,
1473 "handle_action - unknown action category %d or invalid "
1474 "frame",
1475 mgmt->u.action.category);
1476 if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) &&
1477 !(mgmt->sa[0] & 0x01)) {
1478 struct ieee80211_mgmt *resp;
1479
1480 /*
1481 * IEEE 802.11-REVma/D9.0 - 7.3.1.11
1482 * Return the Action frame to the source without change
1483 * except that MSB of the Category set to 1.
1484 */
1485 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action "
1486 "frame back to sender");
1487 resp = os_malloc(len);
1488 if (resp == NULL)
1489 return;
1490 os_memcpy(resp, mgmt, len);
1491 os_memcpy(resp->da, resp->sa, ETH_ALEN);
1492 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
1493 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
1494 resp->u.action.category |= 0x80;
1495
1496 hostapd_drv_send_mlme(hapd, resp, len);
1497 os_free(resp);
1498 }
1499 }
1500
1501
1502 /**
1503 * ieee802_11_mgmt - process incoming IEEE 802.11 management frames
1504 * @hapd: hostapd BSS data structure (the BSS to which the management frame was
1505 * sent to)
1506 * @buf: management frame data (starting from IEEE 802.11 header)
1507 * @len: length of frame data in octets
1508 * @fi: meta data about received frame (signal level, etc.)
1509 *
1510 * Process all incoming IEEE 802.11 management frames. This will be called for
1511 * each frame received from the kernel driver through wlan#ap interface. In
1512 * addition, it can be called to re-inserted pending frames (e.g., when using
1513 * external RADIUS server as an MAC ACL).
1514 */
ieee802_11_mgmt(struct hostapd_data * hapd,const u8 * buf,size_t len,struct hostapd_frame_info * fi)1515 void ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len,
1516 struct hostapd_frame_info *fi)
1517 {
1518 struct ieee80211_mgmt *mgmt;
1519 int broadcast;
1520 u16 fc, stype;
1521
1522 if (len < 24)
1523 return;
1524
1525 mgmt = (struct ieee80211_mgmt *) buf;
1526 fc = le_to_host16(mgmt->frame_control);
1527 stype = WLAN_FC_GET_STYPE(fc);
1528
1529 if (stype == WLAN_FC_STYPE_BEACON) {
1530 handle_beacon(hapd, mgmt, len, fi);
1531 return;
1532 }
1533
1534 broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff &&
1535 mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff &&
1536 mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff;
1537
1538 if (!broadcast &&
1539 os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) {
1540 printf("MGMT: BSSID=" MACSTR " not our address\n",
1541 MAC2STR(mgmt->bssid));
1542 return;
1543 }
1544
1545
1546 if (stype == WLAN_FC_STYPE_PROBE_REQ) {
1547 handle_probe_req(hapd, mgmt, len);
1548 return;
1549 }
1550
1551 if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) {
1552 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1553 HOSTAPD_LEVEL_DEBUG,
1554 "MGMT: DA=" MACSTR " not our address",
1555 MAC2STR(mgmt->da));
1556 return;
1557 }
1558
1559 switch (stype) {
1560 case WLAN_FC_STYPE_AUTH:
1561 wpa_printf(MSG_DEBUG, "mgmt::auth");
1562 handle_auth(hapd, mgmt, len);
1563 break;
1564 case WLAN_FC_STYPE_ASSOC_REQ:
1565 wpa_printf(MSG_DEBUG, "mgmt::assoc_req");
1566 handle_assoc(hapd, mgmt, len, 0);
1567 break;
1568 case WLAN_FC_STYPE_REASSOC_REQ:
1569 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req");
1570 handle_assoc(hapd, mgmt, len, 1);
1571 break;
1572 case WLAN_FC_STYPE_DISASSOC:
1573 wpa_printf(MSG_DEBUG, "mgmt::disassoc");
1574 handle_disassoc(hapd, mgmt, len);
1575 break;
1576 case WLAN_FC_STYPE_DEAUTH:
1577 wpa_msg(hapd, MSG_DEBUG, "mgmt::deauth");
1578 handle_deauth(hapd, mgmt, len);
1579 break;
1580 case WLAN_FC_STYPE_ACTION:
1581 wpa_printf(MSG_DEBUG, "mgmt::action");
1582 handle_action(hapd, mgmt, len);
1583 break;
1584 default:
1585 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1586 HOSTAPD_LEVEL_DEBUG,
1587 "unknown mgmt frame subtype %d", stype);
1588 break;
1589 }
1590 }
1591
1592
handle_auth_cb(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int ok)1593 static void handle_auth_cb(struct hostapd_data *hapd,
1594 const struct ieee80211_mgmt *mgmt,
1595 size_t len, int ok)
1596 {
1597 u16 auth_alg, auth_transaction, status_code;
1598 struct sta_info *sta;
1599
1600 if (!ok) {
1601 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
1602 HOSTAPD_LEVEL_NOTICE,
1603 "did not acknowledge authentication response");
1604 return;
1605 }
1606
1607 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
1608 printf("handle_auth_cb - too short payload (len=%lu)\n",
1609 (unsigned long) len);
1610 return;
1611 }
1612
1613 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
1614 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
1615 status_code = le_to_host16(mgmt->u.auth.status_code);
1616
1617 sta = ap_get_sta(hapd, mgmt->da);
1618 if (!sta) {
1619 printf("handle_auth_cb: STA " MACSTR " not found\n",
1620 MAC2STR(mgmt->da));
1621 return;
1622 }
1623
1624 if (status_code == WLAN_STATUS_SUCCESS &&
1625 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
1626 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
1627 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1628 HOSTAPD_LEVEL_INFO, "authenticated");
1629 sta->flags |= WLAN_STA_AUTH;
1630 }
1631 }
1632
1633
handle_assoc_cb(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int reassoc,int ok)1634 static void handle_assoc_cb(struct hostapd_data *hapd,
1635 const struct ieee80211_mgmt *mgmt,
1636 size_t len, int reassoc, int ok)
1637 {
1638 u16 status;
1639 struct sta_info *sta;
1640 int new_assoc = 1;
1641 struct ieee80211_ht_capabilities ht_cap;
1642
1643 if (!ok) {
1644 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
1645 HOSTAPD_LEVEL_DEBUG,
1646 "did not acknowledge association response");
1647 return;
1648 }
1649
1650 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) :
1651 sizeof(mgmt->u.assoc_resp))) {
1652 printf("handle_assoc_cb(reassoc=%d) - too short payload "
1653 "(len=%lu)\n", reassoc, (unsigned long) len);
1654 return;
1655 }
1656
1657 if (reassoc)
1658 status = le_to_host16(mgmt->u.reassoc_resp.status_code);
1659 else
1660 status = le_to_host16(mgmt->u.assoc_resp.status_code);
1661
1662 sta = ap_get_sta(hapd, mgmt->da);
1663 if (!sta) {
1664 printf("handle_assoc_cb: STA " MACSTR " not found\n",
1665 MAC2STR(mgmt->da));
1666 return;
1667 }
1668
1669 if (status != WLAN_STATUS_SUCCESS)
1670 goto fail;
1671
1672 /* Stop previous accounting session, if one is started, and allocate
1673 * new session id for the new session. */
1674 accounting_sta_stop(hapd, sta);
1675
1676 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1677 HOSTAPD_LEVEL_INFO,
1678 "associated (aid %d)",
1679 sta->aid);
1680
1681 if (sta->flags & WLAN_STA_ASSOC)
1682 new_assoc = 0;
1683 sta->flags |= WLAN_STA_ASSOC;
1684 if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa) ||
1685 sta->auth_alg == WLAN_AUTH_FT) {
1686 /*
1687 * Open, static WEP, or FT protocol; no separate authorization
1688 * step.
1689 */
1690 ap_sta_set_authorized(hapd, sta, 1);
1691 wpa_msg(hapd->msg_ctx, MSG_INFO,
1692 AP_STA_CONNECTED MACSTR, MAC2STR(sta->addr));
1693 #ifdef ANDROID_BRCM_P2P_PATCH
1694 /* Sending the event to parent is required as SSL listens on parent ctrl iface */
1695 if(hapd->msg_ctx_parent)
1696 wpa_msg(hapd->msg_ctx_parent, MSG_INFO,
1697 AP_STA_CONNECTED MACSTR, MAC2STR(sta->addr));
1698 #endif /* ANDROID_BRCM_P2P_PATCH */
1699 }
1700
1701 if (reassoc)
1702 mlme_reassociate_indication(hapd, sta);
1703 else
1704 mlme_associate_indication(hapd, sta);
1705
1706 #ifdef CONFIG_IEEE80211W
1707 sta->sa_query_timed_out = 0;
1708 #endif /* CONFIG_IEEE80211W */
1709
1710 /*
1711 * Remove the STA entry in order to make sure the STA PS state gets
1712 * cleared and configuration gets updated in case of reassociation back
1713 * to the same AP.
1714 */
1715 hostapd_drv_sta_remove(hapd, sta->addr);
1716
1717 #ifdef CONFIG_IEEE80211N
1718 if (sta->flags & WLAN_STA_HT)
1719 hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap);
1720 #endif /* CONFIG_IEEE80211N */
1721
1722 if (hostapd_sta_add(hapd, sta->addr, sta->aid, sta->capability,
1723 sta->supported_rates, sta->supported_rates_len,
1724 sta->listen_interval,
1725 sta->flags & WLAN_STA_HT ? &ht_cap : NULL)) {
1726 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1727 HOSTAPD_LEVEL_NOTICE,
1728 "Could not add STA to kernel driver");
1729 }
1730
1731 if (sta->flags & WLAN_STA_WDS)
1732 hostapd_set_wds_sta(hapd, sta->addr, sta->aid, 1);
1733
1734 if (sta->eapol_sm == NULL) {
1735 /*
1736 * This STA does not use RADIUS server for EAP authentication,
1737 * so bind it to the selected VLAN interface now, since the
1738 * interface selection is not going to change anymore.
1739 */
1740 if (ap_sta_bind_vlan(hapd, sta, 0) < 0)
1741 goto fail;
1742 } else if (sta->vlan_id) {
1743 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */
1744 if (ap_sta_bind_vlan(hapd, sta, 0) < 0)
1745 goto fail;
1746 }
1747
1748 hostapd_set_sta_flags(hapd, sta);
1749
1750 if (sta->auth_alg == WLAN_AUTH_FT)
1751 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT);
1752 else
1753 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
1754 hapd->new_assoc_sta_cb(hapd, sta, !new_assoc);
1755
1756 ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
1757
1758 fail:
1759 /* Copy of the association request is not needed anymore */
1760 if (sta->last_assoc_req) {
1761 os_free(sta->last_assoc_req);
1762 sta->last_assoc_req = NULL;
1763 }
1764 }
1765
1766
1767 /**
1768 * ieee802_11_mgmt_cb - Process management frame TX status callback
1769 * @hapd: hostapd BSS data structure (the BSS from which the management frame
1770 * was sent from)
1771 * @buf: management frame data (starting from IEEE 802.11 header)
1772 * @len: length of frame data in octets
1773 * @stype: management frame subtype from frame control field
1774 * @ok: Whether the frame was ACK'ed
1775 */
ieee802_11_mgmt_cb(struct hostapd_data * hapd,const u8 * buf,size_t len,u16 stype,int ok)1776 void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len,
1777 u16 stype, int ok)
1778 {
1779 const struct ieee80211_mgmt *mgmt;
1780 mgmt = (const struct ieee80211_mgmt *) buf;
1781
1782 switch (stype) {
1783 case WLAN_FC_STYPE_AUTH:
1784 wpa_printf(MSG_DEBUG, "mgmt::auth cb");
1785 handle_auth_cb(hapd, mgmt, len, ok);
1786 break;
1787 case WLAN_FC_STYPE_ASSOC_RESP:
1788 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb");
1789 handle_assoc_cb(hapd, mgmt, len, 0, ok);
1790 break;
1791 case WLAN_FC_STYPE_REASSOC_RESP:
1792 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb");
1793 handle_assoc_cb(hapd, mgmt, len, 1, ok);
1794 break;
1795 case WLAN_FC_STYPE_PROBE_RESP:
1796 wpa_printf(MSG_EXCESSIVE, "mgmt::proberesp cb");
1797 break;
1798 case WLAN_FC_STYPE_DEAUTH:
1799 /* ignore */
1800 break;
1801 case WLAN_FC_STYPE_ACTION:
1802 wpa_printf(MSG_DEBUG, "mgmt::action cb");
1803 break;
1804 default:
1805 printf("unknown mgmt cb frame subtype %d\n", stype);
1806 break;
1807 }
1808 }
1809
1810
ieee802_11_get_mib(struct hostapd_data * hapd,char * buf,size_t buflen)1811 int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1812 {
1813 /* TODO */
1814 return 0;
1815 }
1816
1817
ieee802_11_get_mib_sta(struct hostapd_data * hapd,struct sta_info * sta,char * buf,size_t buflen)1818 int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1819 char *buf, size_t buflen)
1820 {
1821 /* TODO */
1822 return 0;
1823 }
1824
1825
hostapd_tx_status(struct hostapd_data * hapd,const u8 * addr,const u8 * buf,size_t len,int ack)1826 void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr,
1827 const u8 *buf, size_t len, int ack)
1828 {
1829 struct sta_info *sta;
1830 struct hostapd_iface *iface = hapd->iface;
1831
1832 sta = ap_get_sta(hapd, addr);
1833 if (sta == NULL && iface->num_bss > 1) {
1834 size_t j;
1835 for (j = 0; j < iface->num_bss; j++) {
1836 hapd = iface->bss[j];
1837 sta = ap_get_sta(hapd, addr);
1838 if (sta)
1839 break;
1840 }
1841 }
1842 if (sta == NULL)
1843 return;
1844 if (sta->flags & WLAN_STA_PENDING_POLL) {
1845 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
1846 "activity poll", MAC2STR(sta->addr),
1847 ack ? "ACKed" : "did not ACK");
1848 if (ack)
1849 sta->flags &= ~WLAN_STA_PENDING_POLL;
1850 }
1851
1852 ieee802_1x_tx_status(hapd, sta, buf, len, ack);
1853 }
1854
1855
ieee802_11_rx_from_unknown(struct hostapd_data * hapd,const u8 * src,int wds)1856 void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src,
1857 int wds)
1858 {
1859 struct sta_info *sta;
1860
1861 sta = ap_get_sta(hapd, src);
1862 if (sta && (sta->flags & WLAN_STA_ASSOC)) {
1863 if (wds && !(sta->flags & WLAN_STA_WDS)) {
1864 wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for "
1865 "STA " MACSTR " (aid %u)",
1866 MAC2STR(sta->addr), sta->aid);
1867 sta->flags |= WLAN_STA_WDS;
1868 hostapd_set_wds_sta(hapd, sta->addr, sta->aid, 1);
1869 }
1870 return;
1871 }
1872
1873 wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA "
1874 MACSTR, MAC2STR(src));
1875 if (src[0] & 0x01) {
1876 /* Broadcast bit set in SA?! Ignore the frame silently. */
1877 return;
1878 }
1879
1880 if (sta && (sta->flags & WLAN_STA_ASSOC_REQ_OK)) {
1881 wpa_printf(MSG_DEBUG, "Association Response to the STA has "
1882 "already been sent, but no TX status yet known - "
1883 "ignore Class 3 frame issue with " MACSTR,
1884 MAC2STR(src));
1885 return;
1886 }
1887
1888 if (sta && (sta->flags & WLAN_STA_AUTH))
1889 hostapd_drv_sta_disassoc(
1890 hapd, src,
1891 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1892 else
1893 hostapd_drv_sta_deauth(
1894 hapd, src,
1895 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1896 }
1897
1898
1899 #endif /* CONFIG_NATIVE_WINDOWS */
1900