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Import hostapd 0.5.8
[dragonfly/port-amd64.git] / contrib / hostapd-0.4.9 / ieee802_11.c
blobd5ad58cbb5360c309c4da0b07b062237c23923c6
1 /*
2 * Host AP (software wireless LAN access point) user space daemon for
3 * Host AP kernel driver / IEEE 802.11 Management
4 * Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.fi>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * Alternatively, this software may be distributed under the terms of BSD
11 * license.
12 *
13 * See README and COPYING for more details.
14 */
15
16 #include <stdlib.h>
17 #include <stdio.h>
18 #include <string.h>
19 #include <sys/socket.h>
20 #include <net/if.h>
21 #include <netinet/in.h>
22 #include <arpa/inet.h>
23 #include <time.h>
24
25 #include "eloop.h"
26 #include "hostapd.h"
27 #include "ieee802_11.h"
28 #include "radius.h"
29 #include "radius_client.h"
30 #include "ieee802_11_auth.h"
31 #include "sta_info.h"
32 #include "eapol_sm.h"
33 #include "rc4.h"
34 #include "ieee802_1x.h"
35 #include "wpa.h"
36 #include "accounting.h"
37 #include "driver.h"
38 #include "hostap_common.h"
39
40
41 static u8 * hostapd_eid_supp_rates(hostapd *hapd, u8 *eid)
42 {
43 u8 *pos = eid;
44
45 *pos++ = WLAN_EID_SUPP_RATES;
46 *pos++ = 4; /* len */
47 *pos++ = 0x82; /* 1 Mbps, base set */
48 *pos++ = 0x84; /* 2 Mbps, base set */
49 *pos++ = 0x0b; /* 5.5 Mbps */
50 *pos++ = 0x16; /* 11 Mbps */
51
52 return pos;
53 }
54
55
56 static u16 hostapd_own_capab_info(hostapd *hapd)
57 {
58 int capab = WLAN_CAPABILITY_ESS;
59 if (hapd->conf->wpa ||
60 (hapd->conf->ieee802_1x &&
61 (hapd->conf->default_wep_key_len ||
62 hapd->conf->individual_wep_key_len)))
63 capab |= WLAN_CAPABILITY_PRIVACY;
64 return capab;
65 }
66
67
68 static const u8 WPA_OUI_TYPE[] = { 0x00, 0x50, 0xf2, 1 };
69
70 ParseRes ieee802_11_parse_elems(struct hostapd_data *hapd, u8 *start,
71 size_t len,
72 struct ieee802_11_elems *elems,
73 int show_errors)
74 {
75 size_t left = len;
76 u8 *pos = start;
77 int unknown = 0;
78
79 memset(elems, 0, sizeof(*elems));
80
81 while (left >= 2) {
82 u8 id, elen;
83
84 id = *pos++;
85 elen = *pos++;
86 left -= 2;
87
88 if (elen > left) {
89 if (show_errors) {
90 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
91 "IEEE 802.11 element parse "
92 "failed (id=%d elen=%d "
93 "left=%lu)\n",
94 id, elen, (unsigned long) left);
95 if (HOSTAPD_DEBUG_COND(HOSTAPD_DEBUG_MINIMAL))
96 hostapd_hexdump("IEs", start, len);
97 }
98 return ParseFailed;
99 }
100
101 switch (id) {
102 case WLAN_EID_SSID:
103 elems->ssid = pos;
104 elems->ssid_len = elen;
105 break;
106 case WLAN_EID_SUPP_RATES:
107 elems->supp_rates = pos;
108 elems->supp_rates_len = elen;
109 break;
110 case WLAN_EID_FH_PARAMS:
111 elems->fh_params = pos;
112 elems->fh_params_len = elen;
113 break;
114 case WLAN_EID_DS_PARAMS:
115 elems->ds_params = pos;
116 elems->ds_params_len = elen;
117 break;
118 case WLAN_EID_CF_PARAMS:
119 elems->cf_params = pos;
120 elems->cf_params_len = elen;
121 break;
122 case WLAN_EID_TIM:
123 elems->tim = pos;
124 elems->tim_len = elen;
125 break;
126 case WLAN_EID_IBSS_PARAMS:
127 elems->ibss_params = pos;
128 elems->ibss_params_len = elen;
129 break;
130 case WLAN_EID_CHALLENGE:
131 elems->challenge = pos;
132 elems->challenge_len = elen;
133 break;
134 case WLAN_EID_GENERIC:
135 if (elen > 4 && memcmp(pos, WPA_OUI_TYPE, 4) == 0) {
136 elems->wpa_ie = pos;
137 elems->wpa_ie_len = elen;
138 } else if (show_errors) {
139 HOSTAPD_DEBUG(HOSTAPD_DEBUG_EXCESSIVE,
140 "IEEE 802.11 element parse "
141 "ignored unknown generic element"
142 " (id=%d elen=%d OUI:type="
143 "%02x-%02x-%02x:%d)\n",
144 id, elen,
145 elen >= 1 ? pos[0] : 0,
146 elen >= 2 ? pos[1] : 0,
147 elen >= 3 ? pos[2] : 0,
148 elen >= 4 ? pos[3] : 0);
149 unknown++;
150 } else {
151 unknown++;
152 }
153 break;
154 case WLAN_EID_RSN:
155 elems->rsn_ie = pos;
156 elems->rsn_ie_len = elen;
157 break;
158 default:
159 unknown++;
160 if (!show_errors)
161 break;
162 HOSTAPD_DEBUG(HOSTAPD_DEBUG_EXCESSIVE,
163 "IEEE 802.11 element parse ignored "
164 "unknown element (id=%d elen=%d)\n",
165 id, elen);
166 break;
167 }
168
169 left -= elen;
170 pos += elen;
171 }
172
173 if (left)
174 return ParseFailed;
175
176 return unknown ? ParseUnknown : ParseOK;
177 }
178
179
180 static void ieee802_11_print_ssid(const u8 *ssid, u8 len)
181 {
182 int i;
183 for (i = 0; i < len; i++) {
184 if (ssid[i] >= 32 && ssid[i] < 127)
185 printf("%c", ssid[i]);
186 else
187 printf("<%02x>", ssid[i]);
188 }
189 }
190
191
192 static void ieee802_11_sta_authenticate(void *eloop_ctx, void *timeout_ctx)
193 {
194 hostapd *hapd = eloop_ctx;
195 struct ieee80211_mgmt mgmt;
196
197 if (hapd->assoc_ap_state == WAIT_BEACON)
198 hapd->assoc_ap_state = AUTHENTICATE;
199 if (hapd->assoc_ap_state != AUTHENTICATE)
200 return;
201
202 printf("Authenticate with AP " MACSTR " SSID=",
203 MAC2STR(hapd->conf->assoc_ap_addr));
204 ieee802_11_print_ssid((u8 *) hapd->assoc_ap_ssid,
205 hapd->assoc_ap_ssid_len);
206 printf(" (as station)\n");
207
208 memset(&mgmt, 0, sizeof(mgmt));
209 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
210 WLAN_FC_STYPE_AUTH);
211 /* Request TX callback */
212 mgmt.frame_control |= host_to_le16(BIT(1));
213 memcpy(mgmt.da, hapd->conf->assoc_ap_addr, ETH_ALEN);
214 memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
215 memcpy(mgmt.bssid, hapd->conf->assoc_ap_addr, ETH_ALEN);
216 mgmt.u.auth.auth_alg = host_to_le16(WLAN_AUTH_OPEN);
217 mgmt.u.auth.auth_transaction = host_to_le16(1);
218 mgmt.u.auth.status_code = host_to_le16(0);
219 if (hostapd_send_mgmt_frame(hapd, &mgmt, IEEE80211_HDRLEN +
220 sizeof(mgmt.u.auth), 0) < 0)
221 perror("ieee802_11_sta_authenticate: send");
222
223 /* Try to authenticate again, if this attempt fails or times out. */
224 eloop_register_timeout(5, 0, ieee802_11_sta_authenticate, hapd, NULL);
225 }
226
227
228 static void ieee802_11_sta_associate(void *eloop_ctx, void *timeout_ctx)
229 {
230 hostapd *hapd = eloop_ctx;
231 u8 buf[256];
232 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) buf;
233 u8 *p;
234
235 if (hapd->assoc_ap_state == AUTHENTICATE)
236 hapd->assoc_ap_state = ASSOCIATE;
237 if (hapd->assoc_ap_state != ASSOCIATE)
238 return;
239
240 printf("Associate with AP " MACSTR " SSID=",
241 MAC2STR(hapd->conf->assoc_ap_addr));
242 ieee802_11_print_ssid((u8 *) hapd->assoc_ap_ssid,
243 hapd->assoc_ap_ssid_len);
244 printf(" (as station)\n");
245
246 memset(mgmt, 0, sizeof(*mgmt));
247 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
248 WLAN_FC_STYPE_ASSOC_REQ);
249 /* Request TX callback */
250 mgmt->frame_control |= host_to_le16(BIT(1));
251 memcpy(mgmt->da, hapd->conf->assoc_ap_addr, ETH_ALEN);
252 memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
253 memcpy(mgmt->bssid, hapd->conf->assoc_ap_addr, ETH_ALEN);
254 mgmt->u.assoc_req.capab_info = host_to_le16(0);
255 mgmt->u.assoc_req.listen_interval = host_to_le16(1);
256 p = &mgmt->u.assoc_req.variable[0];
257
258 *p++ = WLAN_EID_SSID;
259 *p++ = hapd->assoc_ap_ssid_len;
260 memcpy(p, hapd->assoc_ap_ssid, hapd->assoc_ap_ssid_len);
261 p += hapd->assoc_ap_ssid_len;
262
263 p = hostapd_eid_supp_rates(hapd, p);
264
265 if (hostapd_send_mgmt_frame(hapd, mgmt, p - (u8 *) mgmt, 0) < 0)
266 perror("ieee802_11_sta_associate: send");
267
268 /* Try to authenticate again, if this attempt fails or times out. */
269 eloop_register_timeout(5, 0, ieee802_11_sta_associate, hapd, NULL);
270 }
271
272
273 static u16 auth_shared_key(hostapd *hapd, struct sta_info *sta,
274 u16 auth_transaction, u8 *challenge, int iswep)
275 {
276 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
277 HOSTAPD_LEVEL_DEBUG,
278 "authentication (shared key, transaction %d)",
279 auth_transaction);
280
281 if (auth_transaction == 1) {
282 if (!sta->challenge) {
283 /* Generate a pseudo-random challenge */
284 u8 key[8];
285 time_t now;
286 int r;
287 sta->challenge = malloc(WLAN_AUTH_CHALLENGE_LEN);
288 if (!sta->challenge)
289 return WLAN_STATUS_UNSPECIFIED_FAILURE;
290 memset(sta->challenge, 0, WLAN_AUTH_CHALLENGE_LEN);
291
292 now = time(NULL);
293 r = random();
294 memcpy(key, &now, 4);
295 memcpy(key + 4, &r, 4);
296 rc4(sta->challenge, WLAN_AUTH_CHALLENGE_LEN,
297 key, sizeof(key));
298 }
299 return 0;
300 }
301
302 if (auth_transaction != 3)
303 return WLAN_STATUS_UNSPECIFIED_FAILURE;
304
305 /* Transaction 3 */
306 if (!iswep || !sta->challenge || !challenge ||
307 memcmp(sta->challenge, challenge, WLAN_AUTH_CHALLENGE_LEN)) {
308 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
309 HOSTAPD_LEVEL_INFO,
310 "shared key authentication - invalid "
311 "challenge-response");
312 return WLAN_STATUS_CHALLENGE_FAIL;
313 }
314
315 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
316 HOSTAPD_LEVEL_DEBUG,
317 "authentication OK (shared key)");
318 #ifdef IEEE80211_REQUIRE_AUTH_ACK
319 /* Station will be marked authenticated if it ACKs the
320 * authentication reply. */
321 #else
322 sta->flags |= WLAN_STA_AUTH;
323 wpa_sm_event(hapd, sta, WPA_AUTH);
324 #endif
325 free(sta->challenge);
326 sta->challenge = NULL;
327
328 return 0;
329 }
330
331
332 static void send_auth_reply(hostapd *hapd, struct ieee80211_mgmt *mgmt,
333 u16 auth_alg, u16 auth_transaction, u16 resp,
334 u8 *challenge)
335 {
336 u8 buf[IEEE80211_HDRLEN + sizeof(mgmt->u.auth) + 2 +
337 WLAN_AUTH_CHALLENGE_LEN];
338 struct ieee80211_mgmt *reply;
339 size_t rlen;
340
341 memset(buf, 0, sizeof(buf));
342 reply = (struct ieee80211_mgmt *) buf;
343 reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
344 WLAN_FC_STYPE_AUTH);
345 /* Request TX callback */
346 reply->frame_control |= host_to_le16(BIT(1));
347 memcpy(reply->da, mgmt->sa, ETH_ALEN);
348 memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
349 memcpy(reply->bssid, mgmt->bssid, ETH_ALEN);
350
351 reply->u.auth.auth_alg = host_to_le16(auth_alg);
352 reply->u.auth.auth_transaction = host_to_le16(auth_transaction);
353 reply->u.auth.status_code = host_to_le16(resp);
354 rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth);
355 if (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 2 &&
356 challenge) {
357 u8 *p = reply->u.auth.variable;
358 *p++ = WLAN_EID_CHALLENGE;
359 *p++ = WLAN_AUTH_CHALLENGE_LEN;
360 memcpy(p, challenge, WLAN_AUTH_CHALLENGE_LEN);
361 rlen += 2 + WLAN_AUTH_CHALLENGE_LEN;
362 } else
363 challenge = NULL;
364
365 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
366 "authentication reply: STA=" MACSTR " auth_alg=%d "
367 "auth_transaction=%d resp=%d%s\n",
368 MAC2STR(mgmt->sa), auth_alg, auth_transaction,
369 resp, challenge ? " challenge" : "");
370 if (hostapd_send_mgmt_frame(hapd, reply, rlen, 0) < 0)
371 perror("send_auth_reply: send");
372 }
373
374
375 static void handle_auth(hostapd *hapd, struct ieee80211_mgmt *mgmt, size_t len)
376 {
377 u16 auth_alg, auth_transaction, status_code;
378 u16 resp = WLAN_STATUS_SUCCESS;
379 struct sta_info *sta = NULL;
380 int res;
381 u16 fc;
382 u8 *challenge = NULL;
383 u32 session_timeout, acct_interim_interval;
384
385 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
386 printf("handle_auth - too short payload (len=%lu)\n",
387 (unsigned long) len);
388 return;
389 }
390
391 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
392 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
393 status_code = le_to_host16(mgmt->u.auth.status_code);
394 fc = le_to_host16(mgmt->frame_control);
395
396 if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) +
397 2 + WLAN_AUTH_CHALLENGE_LEN &&
398 mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE &&
399 mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN)
400 challenge = &mgmt->u.auth.variable[2];
401
402 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
403 "authentication: STA=" MACSTR " auth_alg=%d "
404 "auth_transaction=%d status_code=%d wep=%d%s\n",
405 MAC2STR(mgmt->sa), auth_alg, auth_transaction,
406 status_code, !!(fc & WLAN_FC_ISWEP),
407 challenge ? " challenge" : "");
408
409 if (hapd->assoc_ap_state == AUTHENTICATE && auth_transaction == 2 &&
410 memcmp(mgmt->sa, hapd->conf->assoc_ap_addr, ETH_ALEN) == 0 &&
411 memcmp(mgmt->bssid, hapd->conf->assoc_ap_addr, ETH_ALEN) == 0) {
412 if (status_code != 0) {
413 printf("Authentication (as station) with AP "
414 MACSTR " failed (status_code=%d)\n",
415 MAC2STR(hapd->conf->assoc_ap_addr),
416 status_code);
417 return;
418 }
419 printf("Authenticated (as station) with AP " MACSTR "\n",
420 MAC2STR(hapd->conf->assoc_ap_addr));
421 ieee802_11_sta_associate(hapd, NULL);
422 return;
423 }
424
425 if (hapd->tkip_countermeasures) {
426 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
427 goto fail;
428 }
429
430 if (!(((hapd->conf->auth_algs & HOSTAPD_AUTH_OPEN) &&
431 auth_alg == WLAN_AUTH_OPEN) ||
432 ((hapd->conf->auth_algs & HOSTAPD_AUTH_SHARED_KEY) &&
433 auth_alg == WLAN_AUTH_SHARED_KEY))) {
434 printf("Unsupported authentication algorithm (%d)\n",
435 auth_alg);
436 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
437 goto fail;
438 }
439
440 if (!(auth_transaction == 1 ||
441 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
442 printf("Unknown authentication transaction number (%d)\n",
443 auth_transaction);
444 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
445 goto fail;
446 }
447
448 if (memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
449 printf("Station " MACSTR " not allowed to authenticate.\n",
450 MAC2STR(mgmt->sa));
451 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
452 goto fail;
453 }
454
455 res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len,
456 &session_timeout,
457 &acct_interim_interval);
458 if (res == HOSTAPD_ACL_REJECT) {
459 printf("Station " MACSTR " not allowed to authenticate.\n",
460 MAC2STR(mgmt->sa));
461 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
462 goto fail;
463 }
464 if (res == HOSTAPD_ACL_PENDING) {
465 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL, "Authentication frame "
466 "from " MACSTR " waiting for an external "
467 "authentication\n", MAC2STR(mgmt->sa));
468 /* Authentication code will re-send the authentication frame
469 * after it has received (and cached) information from the
470 * external source. */
471 return;
472 }
473
474 sta = ap_sta_add(hapd, mgmt->sa);
475 if (!sta) {
476 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
477 goto fail;
478 }
479 sta->flags &= ~WLAN_STA_PREAUTH;
480 ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
481
482 if (hapd->conf->radius->acct_interim_interval == 0 &&
483 acct_interim_interval)
484 sta->acct_interim_interval = acct_interim_interval;
485 if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT)
486 ap_sta_session_timeout(hapd, sta, session_timeout);
487 else
488 ap_sta_no_session_timeout(hapd, sta);
489
490 switch (auth_alg) {
491 case WLAN_AUTH_OPEN:
492 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
493 HOSTAPD_LEVEL_DEBUG,
494 "authentication OK (open system)");
495 #ifdef IEEE80211_REQUIRE_AUTH_ACK
496 /* Station will be marked authenticated if it ACKs the
497 * authentication reply. */
498 #else
499 sta->flags |= WLAN_STA_AUTH;
500 wpa_sm_event(hapd, sta, WPA_AUTH);
501 #endif
502 break;
503 case WLAN_AUTH_SHARED_KEY:
504 resp = auth_shared_key(hapd, sta, auth_transaction, challenge,
505 fc & WLAN_FC_ISWEP);
506 break;
507 }
508
509 fail:
510 send_auth_reply(hapd, mgmt, auth_alg, auth_transaction + 1, resp,
511 sta ? sta->challenge : NULL);
512 }
513
514
515 static void handle_assoc(hostapd *hapd, struct ieee80211_mgmt *mgmt,
516 size_t len, int reassoc)
517 {
518 u16 capab_info, listen_interval;
519 u16 resp = WLAN_STATUS_SUCCESS;
520 u8 *pos, *wpa_ie;
521 size_t wpa_ie_len;
522 int send_deauth = 0, send_len, left, i;
523 struct sta_info *sta;
524 struct ieee802_11_elems elems;
525
526 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) :
527 sizeof(mgmt->u.assoc_req))) {
528 printf("handle_assoc(reassoc=%d) - too short payload (len=%lu)"
529 "\n", reassoc, (unsigned long) len);
530 return;
531 }
532
533 if (reassoc) {
534 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info);
535 listen_interval = le_to_host16(
536 mgmt->u.reassoc_req.listen_interval);
537 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
538 "reassociation request: STA=" MACSTR
539 " capab_info=0x%02x "
540 "listen_interval=%d current_ap=" MACSTR "\n",
541 MAC2STR(mgmt->sa), capab_info, listen_interval,
542 MAC2STR(mgmt->u.reassoc_req.current_ap));
543 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req));
544 pos = mgmt->u.reassoc_req.variable;
545 } else {
546 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info);
547 listen_interval = le_to_host16(
548 mgmt->u.assoc_req.listen_interval);
549 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
550 "association request: STA=" MACSTR
551 " capab_info=0x%02x listen_interval=%d\n",
552 MAC2STR(mgmt->sa), capab_info, listen_interval);
553 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req));
554 pos = mgmt->u.assoc_req.variable;
555 }
556
557 sta = ap_get_sta(hapd, mgmt->sa);
558 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
559 printf("STA " MACSTR " trying to associate before "
560 "authentication\n", MAC2STR(mgmt->sa));
561 if (sta) {
562 printf(" sta: addr=" MACSTR " aid=%d flags=0x%04x\n",
563 MAC2STR(sta->addr), sta->aid, sta->flags);
564 }
565 send_deauth = 1;
566 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
567 goto fail;
568 }
569
570 if (hapd->tkip_countermeasures) {
571 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
572 goto fail;
573 }
574
575 sta->capability = capab_info;
576
577 /* followed by SSID and Supported rates */
578 if (ieee802_11_parse_elems(hapd, pos, left, &elems, 1) == ParseFailed
579 || !elems.ssid) {
580 printf("STA " MACSTR " sent invalid association request\n",
581 MAC2STR(sta->addr));
582 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
583 goto fail;
584 }
585
586 if (elems.ssid_len != hapd->conf->ssid_len ||
587 memcmp(elems.ssid, hapd->conf->ssid, elems.ssid_len) != 0) {
588 printf("Station " MACSTR " tried to associate with "
589 "unknown SSID '", MAC2STR(sta->addr));
590 ieee802_11_print_ssid(elems.ssid, elems.ssid_len);
591 printf("'\n");
592 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
593 goto fail;
594 }
595
596 if (elems.supp_rates) {
597 if (elems.supp_rates_len > sizeof(sta->supported_rates)) {
598 printf("STA " MACSTR ": Invalid supported rates "
599 "element length %d\n", MAC2STR(sta->addr),
600 elems.supp_rates_len);
601 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
602 goto fail;
603 }
604
605 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
606 memcpy(sta->supported_rates, elems.supp_rates,
607 elems.supp_rates_len);
608
609 sta->tx_supp_rates = 0;
610 for (i = 0; i < elems.supp_rates_len; i++) {
611 if ((sta->supported_rates[i] & 0x7f) == 2)
612 sta->tx_supp_rates |= WLAN_RATE_1M;
613 if ((sta->supported_rates[i] & 0x7f) == 4)
614 sta->tx_supp_rates |= WLAN_RATE_2M;
615 if ((sta->supported_rates[i] & 0x7f) == 11)
616 sta->tx_supp_rates |= WLAN_RATE_5M5;
617 if ((sta->supported_rates[i] & 0x7f) == 22)
618 sta->tx_supp_rates |= WLAN_RATE_11M;
619 }
620 } else
621 sta->tx_supp_rates = 0xff;
622
623 if ((hapd->conf->wpa & HOSTAPD_WPA_VERSION_WPA2) && elems.rsn_ie) {
624 wpa_ie = elems.rsn_ie;
625 wpa_ie_len = elems.rsn_ie_len;
626 } else if ((hapd->conf->wpa & HOSTAPD_WPA_VERSION_WPA) &&
627 elems.wpa_ie) {
628 wpa_ie = elems.wpa_ie;
629 wpa_ie_len = elems.wpa_ie_len;
630 } else {
631 wpa_ie = NULL;
632 wpa_ie_len = 0;
633 }
634 if (hapd->conf->wpa && wpa_ie == NULL) {
635 printf("STA " MACSTR ": No WPA/RSN IE in association "
636 "request\n", MAC2STR(sta->addr));
637 resp = WLAN_STATUS_INVALID_IE;
638 goto fail;
639 }
640
641 if (hapd->conf->wpa) {
642 int res;
643 wpa_ie -= 2;
644 wpa_ie_len += 2;
645 res = wpa_validate_wpa_ie(hapd, sta, wpa_ie, wpa_ie_len,
646 elems.rsn_ie ?
647 HOSTAPD_WPA_VERSION_WPA2 :
648 HOSTAPD_WPA_VERSION_WPA);
649 if (res == WPA_INVALID_GROUP)
650 resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
651 else if (res == WPA_INVALID_PAIRWISE)
652 resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
653 else if (res == WPA_INVALID_AKMP)
654 resp = WLAN_STATUS_AKMP_NOT_VALID;
655 else if (res != WPA_IE_OK)
656 resp = WLAN_STATUS_INVALID_IE;
657 if (resp != WLAN_STATUS_SUCCESS)
658 goto fail;
659 free(sta->wpa_ie);
660 sta->wpa_ie = malloc(wpa_ie_len);
661 if (sta->wpa_ie == NULL) {
662 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
663 goto fail;
664 }
665 sta->wpa_ie_len = wpa_ie_len;
666 memcpy(sta->wpa_ie, wpa_ie, wpa_ie_len);
667 }
668
669 /* get a unique AID */
670 if (sta->aid > 0) {
671 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
672 " old AID %d\n", sta->aid);
673 } else {
674 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
675 if (hapd->sta_aid[sta->aid - 1] == NULL)
676 break;
677 if (sta->aid > MAX_AID_TABLE_SIZE) {
678 sta->aid = 0;
679 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
680 printf(" no room for more AIDs\n");
681 goto fail;
682 } else {
683 hapd->sta_aid[sta->aid - 1] = sta;
684 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
685 " new AID %d\n", sta->aid);
686 }
687 }
688
689 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
690 HOSTAPD_LEVEL_DEBUG,
691 "association OK (aid %d)", sta->aid);
692 /* Station will be marked associated, after it acknowledges AssocResp
693 */
694
695 if (sta->last_assoc_req)
696 free(sta->last_assoc_req);
697 sta->last_assoc_req = (struct ieee80211_mgmt *) malloc(len);
698 if (sta->last_assoc_req)
699 memcpy(sta->last_assoc_req, mgmt, len);
700
701 /* Make sure that the previously registered inactivity timer will not
702 * remove the STA immediately. */
703 sta->timeout_next = STA_NULLFUNC;
704
705 fail:
706
707 /* use the queued buffer for transmission because it is large enough
708 * and not needed anymore */
709 mgmt->frame_control =
710 IEEE80211_FC(WLAN_FC_TYPE_MGMT,
711 (send_deauth ? WLAN_FC_STYPE_DEAUTH :
712 (reassoc ? WLAN_FC_STYPE_REASSOC_RESP :
713 WLAN_FC_STYPE_ASSOC_RESP)));
714 memcpy(mgmt->da, mgmt->sa, ETH_ALEN);
715 memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
716 /* Addr3 = BSSID - already set */
717
718 send_len = IEEE80211_HDRLEN;
719 if (send_deauth) {
720 send_len += sizeof(mgmt->u.deauth);
721 mgmt->u.deauth.reason_code = host_to_le16(resp);
722 } else {
723 u8 *p;
724 send_len += sizeof(mgmt->u.assoc_resp);
725 mgmt->u.assoc_resp.capab_info =
726 host_to_le16(hostapd_own_capab_info(hapd));
727 mgmt->u.assoc_resp.status_code = host_to_le16(resp);
728 mgmt->u.assoc_resp.aid = host_to_le16((sta ? sta->aid : 0)
729 | BIT(14) | BIT(15));
730 /* Supported rates */
731 p = hostapd_eid_supp_rates(hapd, mgmt->u.assoc_resp.variable);
732 send_len += p - mgmt->u.assoc_resp.variable;
733
734 /* Request TX callback */
735 mgmt->frame_control |= host_to_le16(BIT(1));
736 }
737
738 if (hostapd_send_mgmt_frame(hapd, mgmt, send_len, 0) < 0)
739 perror("handle_assoc: send");
740 }
741
742
743 static void handle_assoc_resp(hostapd *hapd, struct ieee80211_mgmt *mgmt,
744 size_t len)
745 {
746 u16 status_code, aid;
747
748 if (hapd->assoc_ap_state != ASSOCIATE) {
749 printf("Unexpected association response received from " MACSTR
750 "\n", MAC2STR(mgmt->sa));
751 return;
752 }
753
754 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_resp)) {
755 printf("handle_assoc_resp - too short payload (len=%lu)\n",
756 (unsigned long) len);
757 return;
758 }
759
760 if (memcmp(mgmt->sa, hapd->conf->assoc_ap_addr, ETH_ALEN) != 0 ||
761 memcmp(mgmt->bssid, hapd->conf->assoc_ap_addr, ETH_ALEN) != 0) {
762 printf("Received association response from unexpected address "
763 "(SA=" MACSTR " BSSID=" MACSTR "\n",
764 MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid));
765 return;
766 }
767
768 status_code = le_to_host16(mgmt->u.assoc_resp.status_code);
769 aid = le_to_host16(mgmt->u.assoc_resp.aid);
770 aid &= ~(BIT(14) | BIT(15));
771
772 if (status_code != 0) {
773 printf("Association (as station) with AP " MACSTR " failed "
774 "(status_code=%d)\n",
775 MAC2STR(hapd->conf->assoc_ap_addr), status_code);
776 /* Try to authenticate again */
777 hapd->assoc_ap_state = AUTHENTICATE;
778 eloop_register_timeout(5, 0, ieee802_11_sta_authenticate,
779 hapd, NULL);
780 }
781
782 printf("Associated (as station) with AP " MACSTR " (aid=%d)\n",
783 MAC2STR(hapd->conf->assoc_ap_addr), aid);
784 hapd->assoc_ap_aid = aid;
785 hapd->assoc_ap_state = ASSOCIATED;
786
787 if (hostapd_set_assoc_ap(hapd, hapd->conf->assoc_ap_addr)) {
788 printf("Could not set associated AP address to kernel "
789 "driver.\n");
790 }
791 }
792
793
794 static void handle_disassoc(hostapd *hapd, struct ieee80211_mgmt *mgmt,
795 size_t len)
796 {
797 struct sta_info *sta;
798
799 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) {
800 printf("handle_disassoc - too short payload (len=%lu)\n",
801 (unsigned long) len);
802 return;
803 }
804
805 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
806 "disassocation: STA=" MACSTR " reason_code=%d\n",
807 MAC2STR(mgmt->sa),
808 le_to_host16(mgmt->u.disassoc.reason_code));
809
810 if (hapd->assoc_ap_state != DO_NOT_ASSOC &&
811 memcmp(mgmt->sa, hapd->conf->assoc_ap_addr, ETH_ALEN) == 0) {
812 printf("Assoc AP " MACSTR " sent disassociation "
813 "(reason_code=%d) - try to authenticate\n",
814 MAC2STR(hapd->conf->assoc_ap_addr),
815 le_to_host16(mgmt->u.disassoc.reason_code));
816 hapd->assoc_ap_state = AUTHENTICATE;
817 ieee802_11_sta_authenticate(hapd, NULL);
818 eloop_register_timeout(0, 500000, ieee802_11_sta_authenticate,
819 hapd, NULL);
820 return;
821 }
822
823 sta = ap_get_sta(hapd, mgmt->sa);
824 if (sta == NULL) {
825 printf("Station " MACSTR " trying to disassociate, but it "
826 "is not associated.\n", MAC2STR(mgmt->sa));
827 return;
828 }
829
830 sta->flags &= ~WLAN_STA_ASSOC;
831 wpa_sm_event(hapd, sta, WPA_DISASSOC);
832 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
833 HOSTAPD_LEVEL_INFO, "disassociated");
834 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
835 ieee802_1x_set_port_enabled(hapd, sta, 0);
836 /* Stop Accounting and IEEE 802.1X sessions, but leave the STA
837 * authenticated. */
838 accounting_sta_stop(hapd, sta);
839 ieee802_1x_free_station(sta);
840 hostapd_sta_remove(hapd, sta->addr);
841
842 if (sta->timeout_next == STA_NULLFUNC ||
843 sta->timeout_next == STA_DISASSOC) {
844 sta->timeout_next = STA_DEAUTH;
845 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
846 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
847 hapd, sta);
848 }
849 }
850
851
852 static void handle_deauth(hostapd *hapd, struct ieee80211_mgmt *mgmt,
853 size_t len)
854 {
855 struct sta_info *sta;
856
857 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) {
858 printf("handle_deauth - too short payload (len=%lu)\n",
859 (unsigned long) len);
860 return;
861 }
862
863 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
864 "deauthentication: STA=" MACSTR " reason_code=%d\n",
865 MAC2STR(mgmt->sa),
866 le_to_host16(mgmt->u.deauth.reason_code));
867
868 if (hapd->assoc_ap_state != DO_NOT_ASSOC &&
869 memcmp(mgmt->sa, hapd->conf->assoc_ap_addr, ETH_ALEN) == 0) {
870 printf("Assoc AP " MACSTR " sent deauthentication "
871 "(reason_code=%d) - try to authenticate\n",
872 MAC2STR(hapd->conf->assoc_ap_addr),
873 le_to_host16(mgmt->u.deauth.reason_code));
874 hapd->assoc_ap_state = AUTHENTICATE;
875 eloop_register_timeout(0, 500000, ieee802_11_sta_authenticate,
876 hapd, NULL);
877 return;
878 }
879
880 sta = ap_get_sta(hapd, mgmt->sa);
881 if (sta == NULL) {
882 printf("Station " MACSTR " trying to deauthenticate, but it "
883 "is not authenticated.\n", MAC2STR(mgmt->sa));
884 return;
885 }
886
887 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
888 wpa_sm_event(hapd, sta, WPA_DEAUTH);
889 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
890 HOSTAPD_LEVEL_DEBUG, "deauthenticated");
891 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
892 ieee802_1x_set_port_enabled(hapd, sta, 0);
893 ap_free_sta(hapd, sta);
894 }
895
896
897 static void handle_beacon(hostapd *hapd, struct ieee80211_mgmt *mgmt,
898 size_t len)
899 {
900 struct ieee802_11_elems elems;
901
902 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) {
903 printf("handle_beacon - too short payload (len=%lu)\n",
904 (unsigned long) len);
905 return;
906 }
907
908 (void) ieee802_11_parse_elems(hapd, mgmt->u.beacon.variable,
909 len - (IEEE80211_HDRLEN +
910 sizeof(mgmt->u.beacon)), &elems,
911 0);
912
913 if (hapd->assoc_ap_state == WAIT_BEACON &&
914 memcmp(mgmt->sa, hapd->conf->assoc_ap_addr, ETH_ALEN) == 0) {
915 if (elems.ssid && elems.ssid_len <= 32) {
916 memcpy(hapd->assoc_ap_ssid, elems.ssid,
917 elems.ssid_len);
918 hapd->assoc_ap_ssid[elems.ssid_len] = '\0';
919 hapd->assoc_ap_ssid_len = elems.ssid_len;
920 }
921 ieee802_11_sta_authenticate(hapd, NULL);
922 }
923
924 if (!HOSTAPD_DEBUG_COND(HOSTAPD_DEBUG_EXCESSIVE))
925 return;
926
927 printf("Beacon from " MACSTR, MAC2STR(mgmt->sa));
928 if (elems.ssid) {
929 printf(" SSID='");
930 ieee802_11_print_ssid(elems.ssid, elems.ssid_len);
931 printf("'");
932 }
933 if (elems.ds_params && elems.ds_params_len == 1)
934 printf(" CHAN=%d", elems.ds_params[0]);
935 printf("\n");
936 }
937
938
939 void ieee802_11_mgmt(struct hostapd_data *hapd, u8 *buf, size_t len, u16 stype)
940 {
941 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) buf;
942
943 if (stype == WLAN_FC_STYPE_BEACON) {
944 HOSTAPD_DEBUG(HOSTAPD_DEBUG_EXCESSIVE, "mgmt::beacon\n");
945 handle_beacon(hapd, mgmt, len);
946 return;
947 }
948
949 if (memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0 &&
950 (hapd->assoc_ap_state == DO_NOT_ASSOC ||
951 memcmp(mgmt->bssid, hapd->conf->assoc_ap_addr, ETH_ALEN) != 0)) {
952 printf("MGMT: BSSID=" MACSTR " not our address\n",
953 MAC2STR(mgmt->bssid));
954 return;
955 }
956
957
958 if (stype == WLAN_FC_STYPE_PROBE_REQ) {
959 printf("mgmt::probe_req\n");
960 return;
961 }
962
963 if (memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) {
964 printf("MGMT: DA=" MACSTR " not our address\n",
965 MAC2STR(mgmt->da));
966 return;
967 }
968
969 switch (stype) {
970 case WLAN_FC_STYPE_AUTH:
971 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL, "mgmt::auth\n");
972 handle_auth(hapd, mgmt, len);
973 break;
974 case WLAN_FC_STYPE_ASSOC_REQ:
975 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL, "mgmt::assoc_req\n");
976 handle_assoc(hapd, mgmt, len, 0);
977 break;
978 case WLAN_FC_STYPE_ASSOC_RESP:
979 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL, "mgmt::assoc_resp\n");
980 handle_assoc_resp(hapd, mgmt, len);
981 break;
982 case WLAN_FC_STYPE_REASSOC_REQ:
983 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL, "mgmt::reassoc_req\n");
984 handle_assoc(hapd, mgmt, len, 1);
985 break;
986 case WLAN_FC_STYPE_DISASSOC:
987 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL, "mgmt::disassoc\n");
988 handle_disassoc(hapd, mgmt, len);
989 break;
990 case WLAN_FC_STYPE_DEAUTH:
991 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL, "mgmt::deauth\n");
992 handle_deauth(hapd, mgmt, len);
993 break;
994 default:
995 printf("unknown mgmt frame subtype %d\n", stype);
996 break;
997 }
998 }
999
1000
1001 static void handle_auth_cb(hostapd *hapd, struct ieee80211_mgmt *mgmt,
1002 size_t len, int ok)
1003 {
1004 u16 auth_alg, auth_transaction, status_code;
1005 struct sta_info *sta;
1006
1007 if (!ok) {
1008 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
1009 HOSTAPD_LEVEL_NOTICE,
1010 "did not acknowledge authentication response");
1011 return;
1012 }
1013
1014 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
1015 printf("handle_auth_cb - too short payload (len=%lu)\n",
1016 (unsigned long) len);
1017 return;
1018 }
1019
1020 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
1021 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
1022 status_code = le_to_host16(mgmt->u.auth.status_code);
1023
1024 sta = ap_get_sta(hapd, mgmt->da);
1025 if (!sta) {
1026 printf("handle_auth_cb: STA " MACSTR " not found\n",
1027 MAC2STR(mgmt->da));
1028 return;
1029 }
1030
1031 if (status_code == WLAN_STATUS_SUCCESS &&
1032 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
1033 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
1034 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1035 HOSTAPD_LEVEL_INFO, "authenticated");
1036 sta->flags |= WLAN_STA_AUTH;
1037 }
1038 }
1039
1040
1041 static void handle_assoc_cb(hostapd *hapd, struct ieee80211_mgmt *mgmt,
1042 size_t len, int reassoc, int ok)
1043 {
1044 u16 status;
1045 struct sta_info *sta;
1046 int new_assoc = 1;
1047
1048 if (!ok) {
1049 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
1050 HOSTAPD_LEVEL_DEBUG,
1051 "did not acknowledge association response");
1052 return;
1053 }
1054
1055 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) :
1056 sizeof(mgmt->u.assoc_req))) {
1057 printf("handle_assoc_cb(reassoc=%d) - too short payload "
1058 "(len=%lu)\n", reassoc, (unsigned long) len);
1059 return;
1060 }
1061
1062 if (reassoc)
1063 status = le_to_host16(mgmt->u.reassoc_resp.status_code);
1064 else
1065 status = le_to_host16(mgmt->u.assoc_resp.status_code);
1066
1067 sta = ap_get_sta(hapd, mgmt->da);
1068 if (!sta) {
1069 printf("handle_assoc_cb: STA " MACSTR " not found\n",
1070 MAC2STR(mgmt->da));
1071 return;
1072 }
1073
1074 if (status != WLAN_STATUS_SUCCESS)
1075 goto fail;
1076
1077 /* Stop previous accounting session, if one is started, and allocate
1078 * new session id for the new session. */
1079 accounting_sta_stop(hapd, sta);
1080 accounting_sta_get_id(hapd, sta);
1081
1082 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1083 HOSTAPD_LEVEL_INFO,
1084 "associated (aid %d, accounting session %08X-%08X)",
1085 sta->aid, sta->acct_session_id_hi,
1086 sta->acct_session_id_lo);
1087
1088 if (sta->flags & WLAN_STA_ASSOC)
1089 new_assoc = 0;
1090 sta->flags |= WLAN_STA_ASSOC;
1091
1092 if (hostapd_sta_add(hapd, sta->addr, sta->aid, sta->capability,
1093 sta->tx_supp_rates)) {
1094 printf("Could not add station to kernel driver.\n");
1095 }
1096
1097 wpa_sm_event(hapd, sta, WPA_ASSOC);
1098 hostapd_new_assoc_sta(hapd, sta, !new_assoc);
1099
1100 ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
1101
1102 fail:
1103 /* Copy of the association request is not needed anymore */
1104 if (sta->last_assoc_req) {
1105 free(sta->last_assoc_req);
1106 sta->last_assoc_req = NULL;
1107 }
1108 }
1109
1110
1111 void ieee802_11_mgmt_cb(struct hostapd_data *hapd, u8 *buf, size_t len,
1112 u16 stype, int ok)
1113 {
1114 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) buf;
1115
1116 switch (stype) {
1117 case WLAN_FC_STYPE_AUTH:
1118 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL, "mgmt::auth cb\n");
1119 handle_auth_cb(hapd, mgmt, len, ok);
1120 break;
1121 case WLAN_FC_STYPE_ASSOC_RESP:
1122 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
1123 "mgmt::assoc_resp cb\n");
1124 handle_assoc_cb(hapd, mgmt, len, 0, ok);
1125 break;
1126 case WLAN_FC_STYPE_REASSOC_RESP:
1127 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
1128 "mgmt::reassoc_resp cb\n");
1129 handle_assoc_cb(hapd, mgmt, len, 1, ok);
1130 break;
1131 default:
1132 printf("unknown mgmt cb frame subtype %d\n", stype);
1133 break;
1134 }
1135 }
1136
1137
1138 static void ieee80211_tkip_countermeasures_stop(void *eloop_ctx,
1139 void *timeout_ctx)
1140 {
1141 struct hostapd_data *hapd = eloop_ctx;
1142 hapd->tkip_countermeasures = 0;
1143 hostapd_set_countermeasures(hapd, 0);
1144 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
1145 HOSTAPD_LEVEL_INFO, "TKIP countermeasures ended");
1146 }
1147
1148
1149 static void ieee80211_tkip_countermeasures_start(struct hostapd_data *hapd)
1150 {
1151 struct sta_info *sta;
1152
1153 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
1154 HOSTAPD_LEVEL_INFO, "TKIP countermeasures initiated");
1155
1156 if (hapd->wpa_auth)
1157 hapd->wpa_auth->dot11RSNATKIPCounterMeasuresInvoked++;
1158 hapd->tkip_countermeasures = 1;
1159 hostapd_set_countermeasures(hapd, 1);
1160 wpa_gtk_rekey(hapd);
1161 eloop_cancel_timeout(ieee80211_tkip_countermeasures_stop, hapd, NULL);
1162 eloop_register_timeout(60, 0, ieee80211_tkip_countermeasures_stop,
1163 hapd, NULL);
1164 for (sta = hapd->sta_list; sta != NULL; sta = sta->next) {
1165 hostapd_sta_deauth(hapd, sta->addr,
1166 WLAN_REASON_MICHAEL_MIC_FAILURE);
1167 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
1168 WLAN_STA_AUTHORIZED);
1169 hostapd_sta_remove(hapd, sta->addr);
1170 }
1171 }
1172
1173
1174 void ieee80211_michael_mic_failure(struct hostapd_data *hapd, u8 *addr,
1175 int local)
1176 {
1177 time_t now;
1178
1179 if (addr && local) {
1180 struct sta_info *sta = ap_get_sta(hapd, addr);
1181 if (sta != NULL) {
1182 sta->dot11RSNAStatsTKIPLocalMICFailures++;
1183 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
1184 HOSTAPD_LEVEL_INFO,
1185 "Michael MIC failure detected in "
1186 "received frame");
1187 } else {
1188 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
1189 "MLME-MICHAELMICFAILURE.indication "
1190 "for not associated STA (" MACSTR
1191 ") ignored\n", MAC2STR(addr));
1192 return;
1193 }
1194 }
1195
1196 time(&now);
1197 if (now > hapd->michael_mic_failure + 60) {
1198 hapd->michael_mic_failures = 1;
1199 } else {
1200 hapd->michael_mic_failures++;
1201 if (hapd->michael_mic_failures > 1)
1202 ieee80211_tkip_countermeasures_start(hapd);
1203 }
1204 hapd->michael_mic_failure = now;
1205 }
1206
1207
1208 int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
1209 {
1210 /* TODO */
1211 return 0;
1212 }
1213
1214
1215 int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
1216 char *buf, size_t buflen)
1217 {
1218 /* TODO */
1219 return 0;
1220 }
A repo for keeping AMD64 port code before merging with the master