xref: /freebsd/contrib/wpa/src/ap/ieee802_11_auth.c (revision d3d381b2b194b4d24853e92eecef55f262688d1a)
1 /*
2  * hostapd / IEEE 802.11 authentication (ACL)
3  * Copyright (c) 2003-2012, Jouni Malinen <j@w1.fi>
4  *
5  * This software may be distributed under the terms of the BSD license.
6  * See README for more details.
7  *
8  * Access control list for IEEE 802.11 authentication can uses statically
9  * configured ACL from configuration files or an external RADIUS server.
10  * Results from external RADIUS queries are cached to allow faster
11  * authentication frame processing.
12  */
13 
14 #include "utils/includes.h"
15 
16 #include "utils/common.h"
17 #include "utils/eloop.h"
18 #include "radius/radius.h"
19 #include "radius/radius_client.h"
20 #include "hostapd.h"
21 #include "ap_config.h"
22 #include "ap_drv_ops.h"
23 #include "ieee802_11.h"
24 #include "ieee802_1x.h"
25 #include "ieee802_11_auth.h"
26 
27 #define RADIUS_ACL_TIMEOUT 30
28 
29 
30 struct hostapd_cached_radius_acl {
31 	struct os_reltime timestamp;
32 	macaddr addr;
33 	int accepted; /* HOSTAPD_ACL_* */
34 	struct hostapd_cached_radius_acl *next;
35 	u32 session_timeout;
36 	u32 acct_interim_interval;
37 	struct vlan_description vlan_id;
38 	struct hostapd_sta_wpa_psk_short *psk;
39 	char *identity;
40 	char *radius_cui;
41 };
42 
43 
44 struct hostapd_acl_query_data {
45 	struct os_reltime timestamp;
46 	u8 radius_id;
47 	macaddr addr;
48 	u8 *auth_msg; /* IEEE 802.11 authentication frame from station */
49 	size_t auth_msg_len;
50 	struct hostapd_acl_query_data *next;
51 };
52 
53 
54 #ifndef CONFIG_NO_RADIUS
55 static void hostapd_acl_cache_free_entry(struct hostapd_cached_radius_acl *e)
56 {
57 	os_free(e->identity);
58 	os_free(e->radius_cui);
59 	hostapd_free_psk_list(e->psk);
60 	os_free(e);
61 }
62 
63 
64 static void hostapd_acl_cache_free(struct hostapd_cached_radius_acl *acl_cache)
65 {
66 	struct hostapd_cached_radius_acl *prev;
67 
68 	while (acl_cache) {
69 		prev = acl_cache;
70 		acl_cache = acl_cache->next;
71 		hostapd_acl_cache_free_entry(prev);
72 	}
73 }
74 
75 
76 static void copy_psk_list(struct hostapd_sta_wpa_psk_short **psk,
77 			  struct hostapd_sta_wpa_psk_short *src)
78 {
79 	if (!psk)
80 		return;
81 
82 	if (src)
83 		src->ref++;
84 
85 	*psk = src;
86 }
87 
88 
89 static int hostapd_acl_cache_get(struct hostapd_data *hapd, const u8 *addr,
90 				 u32 *session_timeout,
91 				 u32 *acct_interim_interval,
92 				 struct vlan_description *vlan_id,
93 				 struct hostapd_sta_wpa_psk_short **psk,
94 				 char **identity, char **radius_cui)
95 {
96 	struct hostapd_cached_radius_acl *entry;
97 	struct os_reltime now;
98 
99 	os_get_reltime(&now);
100 
101 	for (entry = hapd->acl_cache; entry; entry = entry->next) {
102 		if (os_memcmp(entry->addr, addr, ETH_ALEN) != 0)
103 			continue;
104 
105 		if (os_reltime_expired(&now, &entry->timestamp,
106 				       RADIUS_ACL_TIMEOUT))
107 			return -1; /* entry has expired */
108 		if (entry->accepted == HOSTAPD_ACL_ACCEPT_TIMEOUT)
109 			if (session_timeout)
110 				*session_timeout = entry->session_timeout;
111 		if (acct_interim_interval)
112 			*acct_interim_interval =
113 				entry->acct_interim_interval;
114 		if (vlan_id)
115 			*vlan_id = entry->vlan_id;
116 		copy_psk_list(psk, entry->psk);
117 		if (identity) {
118 			if (entry->identity)
119 				*identity = os_strdup(entry->identity);
120 			else
121 				*identity = NULL;
122 		}
123 		if (radius_cui) {
124 			if (entry->radius_cui)
125 				*radius_cui = os_strdup(entry->radius_cui);
126 			else
127 				*radius_cui = NULL;
128 		}
129 		return entry->accepted;
130 	}
131 
132 	return -1;
133 }
134 #endif /* CONFIG_NO_RADIUS */
135 
136 
137 static void hostapd_acl_query_free(struct hostapd_acl_query_data *query)
138 {
139 	if (query == NULL)
140 		return;
141 	os_free(query->auth_msg);
142 	os_free(query);
143 }
144 
145 
146 #ifndef CONFIG_NO_RADIUS
147 static int hostapd_radius_acl_query(struct hostapd_data *hapd, const u8 *addr,
148 				    struct hostapd_acl_query_data *query)
149 {
150 	struct radius_msg *msg;
151 	char buf[128];
152 
153 	query->radius_id = radius_client_get_id(hapd->radius);
154 	msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST, query->radius_id);
155 	if (msg == NULL)
156 		return -1;
157 
158 	if (radius_msg_make_authenticator(msg) < 0) {
159 		wpa_printf(MSG_INFO, "Could not make Request Authenticator");
160 		goto fail;
161 	}
162 
163 	os_snprintf(buf, sizeof(buf), RADIUS_ADDR_FORMAT, MAC2STR(addr));
164 	if (!radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME, (u8 *) buf,
165 				 os_strlen(buf))) {
166 		wpa_printf(MSG_DEBUG, "Could not add User-Name");
167 		goto fail;
168 	}
169 
170 	if (!radius_msg_add_attr_user_password(
171 		    msg, (u8 *) buf, os_strlen(buf),
172 		    hapd->conf->radius->auth_server->shared_secret,
173 		    hapd->conf->radius->auth_server->shared_secret_len)) {
174 		wpa_printf(MSG_DEBUG, "Could not add User-Password");
175 		goto fail;
176 	}
177 
178 	if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr,
179 				   NULL, msg) < 0)
180 		goto fail;
181 
182 	os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
183 		    MAC2STR(addr));
184 	if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
185 				 (u8 *) buf, os_strlen(buf))) {
186 		wpa_printf(MSG_DEBUG, "Could not add Calling-Station-Id");
187 		goto fail;
188 	}
189 
190 	os_snprintf(buf, sizeof(buf), "CONNECT 11Mbps 802.11b");
191 	if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
192 				 (u8 *) buf, os_strlen(buf))) {
193 		wpa_printf(MSG_DEBUG, "Could not add Connect-Info");
194 		goto fail;
195 	}
196 
197 	if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, addr) < 0)
198 		goto fail;
199 	return 0;
200 
201  fail:
202 	radius_msg_free(msg);
203 	return -1;
204 }
205 #endif /* CONFIG_NO_RADIUS */
206 
207 
208 /**
209  * hostapd_check_acl - Check a specified STA against accept/deny ACLs
210  * @hapd: hostapd BSS data
211  * @addr: MAC address of the STA
212  * @vlan_id: Buffer for returning VLAN ID
213  * Returns: HOSTAPD_ACL_ACCEPT, HOSTAPD_ACL_REJECT, or HOSTAPD_ACL_PENDING
214  */
215 int hostapd_check_acl(struct hostapd_data *hapd, const u8 *addr,
216 		      struct vlan_description *vlan_id)
217 {
218 	if (hostapd_maclist_found(hapd->conf->accept_mac,
219 				  hapd->conf->num_accept_mac, addr, vlan_id))
220 		return HOSTAPD_ACL_ACCEPT;
221 
222 	if (hostapd_maclist_found(hapd->conf->deny_mac,
223 				  hapd->conf->num_deny_mac, addr, vlan_id))
224 		return HOSTAPD_ACL_REJECT;
225 
226 	if (hapd->conf->macaddr_acl == ACCEPT_UNLESS_DENIED)
227 		return HOSTAPD_ACL_ACCEPT;
228 	if (hapd->conf->macaddr_acl == DENY_UNLESS_ACCEPTED)
229 		return HOSTAPD_ACL_REJECT;
230 
231 	return HOSTAPD_ACL_PENDING;
232 }
233 
234 
235 /**
236  * hostapd_allowed_address - Check whether a specified STA can be authenticated
237  * @hapd: hostapd BSS data
238  * @addr: MAC address of the STA
239  * @msg: Authentication message
240  * @len: Length of msg in octets
241  * @session_timeout: Buffer for returning session timeout (from RADIUS)
242  * @acct_interim_interval: Buffer for returning account interval (from RADIUS)
243  * @vlan_id: Buffer for returning VLAN ID
244  * @psk: Linked list buffer for returning WPA PSK
245  * @identity: Buffer for returning identity (from RADIUS)
246  * @radius_cui: Buffer for returning CUI (from RADIUS)
247  * Returns: HOSTAPD_ACL_ACCEPT, HOSTAPD_ACL_REJECT, or HOSTAPD_ACL_PENDING
248  *
249  * The caller is responsible for freeing the returned *identity and *radius_cui
250  * values with os_free().
251  */
252 int hostapd_allowed_address(struct hostapd_data *hapd, const u8 *addr,
253 			    const u8 *msg, size_t len, u32 *session_timeout,
254 			    u32 *acct_interim_interval,
255 			    struct vlan_description *vlan_id,
256 			    struct hostapd_sta_wpa_psk_short **psk,
257 			    char **identity, char **radius_cui)
258 {
259 	int res;
260 
261 	if (session_timeout)
262 		*session_timeout = 0;
263 	if (acct_interim_interval)
264 		*acct_interim_interval = 0;
265 	if (vlan_id)
266 		os_memset(vlan_id, 0, sizeof(*vlan_id));
267 	if (psk)
268 		*psk = NULL;
269 	if (identity)
270 		*identity = NULL;
271 	if (radius_cui)
272 		*radius_cui = NULL;
273 
274 	res = hostapd_check_acl(hapd, addr, vlan_id);
275 	if (res != HOSTAPD_ACL_PENDING)
276 		return res;
277 
278 	if (hapd->conf->macaddr_acl == USE_EXTERNAL_RADIUS_AUTH) {
279 #ifdef CONFIG_NO_RADIUS
280 		return HOSTAPD_ACL_REJECT;
281 #else /* CONFIG_NO_RADIUS */
282 		struct hostapd_acl_query_data *query;
283 
284 		/* Check whether ACL cache has an entry for this station */
285 		res = hostapd_acl_cache_get(hapd, addr, session_timeout,
286 					    acct_interim_interval, vlan_id, psk,
287 					    identity, radius_cui);
288 		if (res == HOSTAPD_ACL_ACCEPT ||
289 		    res == HOSTAPD_ACL_ACCEPT_TIMEOUT)
290 			return res;
291 		if (res == HOSTAPD_ACL_REJECT)
292 			return HOSTAPD_ACL_REJECT;
293 
294 		query = hapd->acl_queries;
295 		while (query) {
296 			if (os_memcmp(query->addr, addr, ETH_ALEN) == 0) {
297 				/* pending query in RADIUS retransmit queue;
298 				 * do not generate a new one */
299 				if (identity) {
300 					os_free(*identity);
301 					*identity = NULL;
302 				}
303 				if (radius_cui) {
304 					os_free(*radius_cui);
305 					*radius_cui = NULL;
306 				}
307 				return HOSTAPD_ACL_PENDING;
308 			}
309 			query = query->next;
310 		}
311 
312 		if (!hapd->conf->radius->auth_server)
313 			return HOSTAPD_ACL_REJECT;
314 
315 		/* No entry in the cache - query external RADIUS server */
316 		query = os_zalloc(sizeof(*query));
317 		if (query == NULL) {
318 			wpa_printf(MSG_ERROR, "malloc for query data failed");
319 			return HOSTAPD_ACL_REJECT;
320 		}
321 		os_get_reltime(&query->timestamp);
322 		os_memcpy(query->addr, addr, ETH_ALEN);
323 		if (hostapd_radius_acl_query(hapd, addr, query)) {
324 			wpa_printf(MSG_DEBUG, "Failed to send Access-Request "
325 				   "for ACL query.");
326 			hostapd_acl_query_free(query);
327 			return HOSTAPD_ACL_REJECT;
328 		}
329 
330 		query->auth_msg = os_malloc(len);
331 		if (query->auth_msg == NULL) {
332 			wpa_printf(MSG_ERROR, "Failed to allocate memory for "
333 				   "auth frame.");
334 			hostapd_acl_query_free(query);
335 			return HOSTAPD_ACL_REJECT;
336 		}
337 		os_memcpy(query->auth_msg, msg, len);
338 		query->auth_msg_len = len;
339 		query->next = hapd->acl_queries;
340 		hapd->acl_queries = query;
341 
342 		/* Queued data will be processed in hostapd_acl_recv_radius()
343 		 * when RADIUS server replies to the sent Access-Request. */
344 		return HOSTAPD_ACL_PENDING;
345 #endif /* CONFIG_NO_RADIUS */
346 	}
347 
348 	return HOSTAPD_ACL_REJECT;
349 }
350 
351 
352 #ifndef CONFIG_NO_RADIUS
353 static void hostapd_acl_expire_cache(struct hostapd_data *hapd,
354 				     struct os_reltime *now)
355 {
356 	struct hostapd_cached_radius_acl *prev, *entry, *tmp;
357 
358 	prev = NULL;
359 	entry = hapd->acl_cache;
360 
361 	while (entry) {
362 		if (os_reltime_expired(now, &entry->timestamp,
363 				       RADIUS_ACL_TIMEOUT)) {
364 			wpa_printf(MSG_DEBUG, "Cached ACL entry for " MACSTR
365 				   " has expired.", MAC2STR(entry->addr));
366 			if (prev)
367 				prev->next = entry->next;
368 			else
369 				hapd->acl_cache = entry->next;
370 			hostapd_drv_set_radius_acl_expire(hapd, entry->addr);
371 			tmp = entry;
372 			entry = entry->next;
373 			hostapd_acl_cache_free_entry(tmp);
374 			continue;
375 		}
376 
377 		prev = entry;
378 		entry = entry->next;
379 	}
380 }
381 
382 
383 static void hostapd_acl_expire_queries(struct hostapd_data *hapd,
384 				       struct os_reltime *now)
385 {
386 	struct hostapd_acl_query_data *prev, *entry, *tmp;
387 
388 	prev = NULL;
389 	entry = hapd->acl_queries;
390 
391 	while (entry) {
392 		if (os_reltime_expired(now, &entry->timestamp,
393 				       RADIUS_ACL_TIMEOUT)) {
394 			wpa_printf(MSG_DEBUG, "ACL query for " MACSTR
395 				   " has expired.", MAC2STR(entry->addr));
396 			if (prev)
397 				prev->next = entry->next;
398 			else
399 				hapd->acl_queries = entry->next;
400 
401 			tmp = entry;
402 			entry = entry->next;
403 			hostapd_acl_query_free(tmp);
404 			continue;
405 		}
406 
407 		prev = entry;
408 		entry = entry->next;
409 	}
410 }
411 
412 
413 /**
414  * hostapd_acl_expire - ACL cache expiration callback
415  * @hapd: struct hostapd_data *
416  */
417 void hostapd_acl_expire(struct hostapd_data *hapd)
418 {
419 	struct os_reltime now;
420 
421 	os_get_reltime(&now);
422 	hostapd_acl_expire_cache(hapd, &now);
423 	hostapd_acl_expire_queries(hapd, &now);
424 }
425 
426 
427 static void decode_tunnel_passwords(struct hostapd_data *hapd,
428 				    const u8 *shared_secret,
429 				    size_t shared_secret_len,
430 				    struct radius_msg *msg,
431 				    struct radius_msg *req,
432 				    struct hostapd_cached_radius_acl *cache)
433 {
434 	int passphraselen;
435 	char *passphrase;
436 	size_t i;
437 	struct hostapd_sta_wpa_psk_short *psk;
438 
439 	/*
440 	 * Decode all tunnel passwords as PSK and save them into a linked list.
441 	 */
442 	for (i = 0; ; i++) {
443 		passphrase = radius_msg_get_tunnel_password(
444 			msg, &passphraselen, shared_secret, shared_secret_len,
445 			req, i);
446 		/*
447 		 * Passphrase is NULL iff there is no i-th Tunnel-Password
448 		 * attribute in msg.
449 		 */
450 		if (passphrase == NULL)
451 			break;
452 
453 		/*
454 		 * Passphase should be 8..63 chars (to be hashed with SSID)
455 		 * or 64 chars hex string (no separate hashing with SSID).
456 		 */
457 
458 		if (passphraselen < MIN_PASSPHRASE_LEN ||
459 		    passphraselen > MAX_PASSPHRASE_LEN + 1)
460 			goto free_pass;
461 
462 		/*
463 		 * passphrase does not contain the NULL termination.
464 		 * Add it here as pbkdf2_sha1() requires it.
465 		 */
466 		psk = os_zalloc(sizeof(struct hostapd_sta_wpa_psk_short));
467 		if (psk) {
468 			if ((passphraselen == MAX_PASSPHRASE_LEN + 1) &&
469 			    (hexstr2bin(passphrase, psk->psk, PMK_LEN) < 0)) {
470 				hostapd_logger(hapd, cache->addr,
471 					       HOSTAPD_MODULE_RADIUS,
472 					       HOSTAPD_LEVEL_WARNING,
473 					       "invalid hex string (%d chars) in Tunnel-Password",
474 					       passphraselen);
475 				goto skip;
476 			} else if (passphraselen <= MAX_PASSPHRASE_LEN) {
477 				os_memcpy(psk->passphrase, passphrase,
478 					  passphraselen);
479 				psk->is_passphrase = 1;
480 			}
481 			psk->next = cache->psk;
482 			cache->psk = psk;
483 			psk = NULL;
484 		}
485 skip:
486 		os_free(psk);
487 free_pass:
488 		os_free(passphrase);
489 	}
490 }
491 
492 
493 /**
494  * hostapd_acl_recv_radius - Process incoming RADIUS Authentication messages
495  * @msg: RADIUS response message
496  * @req: RADIUS request message
497  * @shared_secret: RADIUS shared secret
498  * @shared_secret_len: Length of shared_secret in octets
499  * @data: Context data (struct hostapd_data *)
500  * Returns: RADIUS_RX_PROCESSED if RADIUS message was a reply to ACL query (and
501  * was processed here) or RADIUS_RX_UNKNOWN if not.
502  */
503 static RadiusRxResult
504 hostapd_acl_recv_radius(struct radius_msg *msg, struct radius_msg *req,
505 			const u8 *shared_secret, size_t shared_secret_len,
506 			void *data)
507 {
508 	struct hostapd_data *hapd = data;
509 	struct hostapd_acl_query_data *query, *prev;
510 	struct hostapd_cached_radius_acl *cache;
511 	struct radius_hdr *hdr = radius_msg_get_hdr(msg);
512 	int *untagged, *tagged, *notempty;
513 
514 	query = hapd->acl_queries;
515 	prev = NULL;
516 	while (query) {
517 		if (query->radius_id == hdr->identifier)
518 			break;
519 		prev = query;
520 		query = query->next;
521 	}
522 	if (query == NULL)
523 		return RADIUS_RX_UNKNOWN;
524 
525 	wpa_printf(MSG_DEBUG, "Found matching Access-Request for RADIUS "
526 		   "message (id=%d)", query->radius_id);
527 
528 	if (radius_msg_verify(msg, shared_secret, shared_secret_len, req, 0)) {
529 		wpa_printf(MSG_INFO, "Incoming RADIUS packet did not have "
530 			   "correct authenticator - dropped\n");
531 		return RADIUS_RX_INVALID_AUTHENTICATOR;
532 	}
533 
534 	if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
535 	    hdr->code != RADIUS_CODE_ACCESS_REJECT) {
536 		wpa_printf(MSG_DEBUG, "Unknown RADIUS message code %d to ACL "
537 			   "query", hdr->code);
538 		return RADIUS_RX_UNKNOWN;
539 	}
540 
541 	/* Insert Accept/Reject info into ACL cache */
542 	cache = os_zalloc(sizeof(*cache));
543 	if (cache == NULL) {
544 		wpa_printf(MSG_DEBUG, "Failed to add ACL cache entry");
545 		goto done;
546 	}
547 	os_get_reltime(&cache->timestamp);
548 	os_memcpy(cache->addr, query->addr, sizeof(cache->addr));
549 	if (hdr->code == RADIUS_CODE_ACCESS_ACCEPT) {
550 		u8 *buf;
551 		size_t len;
552 
553 		if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
554 					      &cache->session_timeout) == 0)
555 			cache->accepted = HOSTAPD_ACL_ACCEPT_TIMEOUT;
556 		else
557 			cache->accepted = HOSTAPD_ACL_ACCEPT;
558 
559 		if (radius_msg_get_attr_int32(
560 			    msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
561 			    &cache->acct_interim_interval) == 0 &&
562 		    cache->acct_interim_interval < 60) {
563 			wpa_printf(MSG_DEBUG, "Ignored too small "
564 				   "Acct-Interim-Interval %d for STA " MACSTR,
565 				   cache->acct_interim_interval,
566 				   MAC2STR(query->addr));
567 			cache->acct_interim_interval = 0;
568 		}
569 
570 		notempty = &cache->vlan_id.notempty;
571 		untagged = &cache->vlan_id.untagged;
572 		tagged = cache->vlan_id.tagged;
573 		*notempty = !!radius_msg_get_vlanid(msg, untagged,
574 						    MAX_NUM_TAGGED_VLAN,
575 						    tagged);
576 
577 		decode_tunnel_passwords(hapd, shared_secret, shared_secret_len,
578 					msg, req, cache);
579 
580 		if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME,
581 					    &buf, &len, NULL) == 0) {
582 			cache->identity = os_zalloc(len + 1);
583 			if (cache->identity)
584 				os_memcpy(cache->identity, buf, len);
585 		}
586 		if (radius_msg_get_attr_ptr(
587 			    msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
588 			    &buf, &len, NULL) == 0) {
589 			cache->radius_cui = os_zalloc(len + 1);
590 			if (cache->radius_cui)
591 				os_memcpy(cache->radius_cui, buf, len);
592 		}
593 
594 		if (hapd->conf->wpa_psk_radius == PSK_RADIUS_REQUIRED &&
595 		    !cache->psk)
596 			cache->accepted = HOSTAPD_ACL_REJECT;
597 
598 		if (cache->vlan_id.notempty &&
599 		    !hostapd_vlan_valid(hapd->conf->vlan, &cache->vlan_id)) {
600 			hostapd_logger(hapd, query->addr,
601 				       HOSTAPD_MODULE_RADIUS,
602 				       HOSTAPD_LEVEL_INFO,
603 				       "Invalid VLAN %d%s received from RADIUS server",
604 				       cache->vlan_id.untagged,
605 				       cache->vlan_id.tagged[0] ? "+" : "");
606 			os_memset(&cache->vlan_id, 0, sizeof(cache->vlan_id));
607 		}
608 		if (hapd->conf->ssid.dynamic_vlan == DYNAMIC_VLAN_REQUIRED &&
609 		    !cache->vlan_id.notempty)
610 			cache->accepted = HOSTAPD_ACL_REJECT;
611 	} else
612 		cache->accepted = HOSTAPD_ACL_REJECT;
613 	cache->next = hapd->acl_cache;
614 	hapd->acl_cache = cache;
615 
616 #ifdef CONFIG_DRIVER_RADIUS_ACL
617 	hostapd_drv_set_radius_acl_auth(hapd, query->addr, cache->accepted,
618 					cache->session_timeout);
619 #else /* CONFIG_DRIVER_RADIUS_ACL */
620 #ifdef NEED_AP_MLME
621 	/* Re-send original authentication frame for 802.11 processing */
622 	wpa_printf(MSG_DEBUG, "Re-sending authentication frame after "
623 		   "successful RADIUS ACL query");
624 	ieee802_11_mgmt(hapd, query->auth_msg, query->auth_msg_len, NULL);
625 #endif /* NEED_AP_MLME */
626 #endif /* CONFIG_DRIVER_RADIUS_ACL */
627 
628  done:
629 	if (prev == NULL)
630 		hapd->acl_queries = query->next;
631 	else
632 		prev->next = query->next;
633 
634 	hostapd_acl_query_free(query);
635 
636 	return RADIUS_RX_PROCESSED;
637 }
638 #endif /* CONFIG_NO_RADIUS */
639 
640 
641 /**
642  * hostapd_acl_init: Initialize IEEE 802.11 ACL
643  * @hapd: hostapd BSS data
644  * Returns: 0 on success, -1 on failure
645  */
646 int hostapd_acl_init(struct hostapd_data *hapd)
647 {
648 #ifndef CONFIG_NO_RADIUS
649 	if (radius_client_register(hapd->radius, RADIUS_AUTH,
650 				   hostapd_acl_recv_radius, hapd))
651 		return -1;
652 #endif /* CONFIG_NO_RADIUS */
653 
654 	return 0;
655 }
656 
657 
658 /**
659  * hostapd_acl_deinit - Deinitialize IEEE 802.11 ACL
660  * @hapd: hostapd BSS data
661  */
662 void hostapd_acl_deinit(struct hostapd_data *hapd)
663 {
664 	struct hostapd_acl_query_data *query, *prev;
665 
666 #ifndef CONFIG_NO_RADIUS
667 	hostapd_acl_cache_free(hapd->acl_cache);
668 #endif /* CONFIG_NO_RADIUS */
669 
670 	query = hapd->acl_queries;
671 	while (query) {
672 		prev = query;
673 		query = query->next;
674 		hostapd_acl_query_free(prev);
675 	}
676 }
677 
678 
679 void hostapd_free_psk_list(struct hostapd_sta_wpa_psk_short *psk)
680 {
681 	if (psk && psk->ref) {
682 		/* This will be freed when the last reference is dropped. */
683 		psk->ref--;
684 		return;
685 	}
686 
687 	while (psk) {
688 		struct hostapd_sta_wpa_psk_short *prev = psk;
689 		psk = psk->next;
690 		os_free(prev);
691 	}
692 }
693