src/rsn_supp/pmksa_cache.c

27 	void (*free_cb)(struct rsn_pmksa_cache_entry *entry, void *ctx,
36 static void _pmksa_cache_free_entry(struct rsn_pmksa_cache_entry *entry)
38 	os_free(entry);
43 				   struct rsn_pmksa_cache_entry *entry,
46 	wpa_sm_remove_pmkid(pmksa->sm, entry->aa, entry->pmkid);
48 	pmksa->free_cb(entry, pmksa->ctx, reason);
49 	_pmksa_cache_free_entry(entry);
60 		struct rsn_pmksa_cache_entry *entry = pmksa->pmksa;
61 		pmksa->pmksa = entry->next;
62 		wpa_printf(MSG_DEBUG, "RSN: expired PMKSA cache entry for "
63 			   MACSTR, MAC2STR(entry->aa));
64 		pmksa_cache_free_entry(pmksa, entry, PMKSA_EXPIRE);
82 	struct rsn_pmksa_cache_entry *entry;
95 	entry = pmksa->sm->cur_pmksa ? pmksa->sm->cur_pmksa :
97 	if (entry) {
108  * pmksa_cache_add - Add a PMKSA cache entry
116  * Returns: Pointer to the added PMKSA cache entry or %NULL on error
118  * This function create a PMKSA entry for a new PMK and adds it to the PMKSA
119  * cache. If an old entry is already in the cache for the same Authenticator,
120  * this entry will be replaced with the new entry. PMKID will be calculated
127 	struct rsn_pmksa_cache_entry *entry, *pos, *prev;
133 	entry = os_zalloc(sizeof(*entry));
134 	if (entry == NULL)
136 	os_memcpy(entry->pmk, pmk, pmk_len);
137 	entry->pmk_len = pmk_len;
138 	rsn_pmkid(pmk, pmk_len, aa, spa, entry->pmkid,
141 	entry->expiration = now.sec + pmksa->sm->dot11RSNAConfigPMKLifetime;
142 	entry->reauth_time = now.sec + pmksa->sm->dot11RSNAConfigPMKLifetime *
144 	entry->akmp = akmp;
145 	os_memcpy(entry->aa, aa, ETH_ALEN);
146 	entry->network_ctx = network_ctx;
148 	/* Replace an old entry for the same Authenticator (if found) with the
149 	 * new entry */
156 			    os_memcmp(pos->pmkid, entry->pmkid, PMKID_LEN) ==
159 					   "PMKSA entry");
160 				os_free(entry);
167 			wpa_printf(MSG_DEBUG, "RSN: Replace PMKSA entry for "
174 			 * flushed so that a new entry can be created based on
185 		/* Remove the oldest entry to make room for the new entry */
190 			 * Never remove the current PMKSA cache entry, since
201 				   "PMKSA cache entry (for " MACSTR ") to "
208 	/* Add the new entry; order by expiration time */
212 		if (pos->expiration > entry->expiration)
218 		entry->next = pmksa->pmksa;
219 		pmksa->pmksa = entry;
222 		entry->next = prev->next;
223 		prev->next = entry;
226 	wpa_printf(MSG_DEBUG, "RSN: Added PMKSA cache entry for " MACSTR
227 		   " network_ctx=%p", MAC2STR(entry->aa), network_ctx);
228 	wpa_sm_add_pmkid(pmksa->sm, entry->aa, entry->pmkid);
230 	return entry;
241 	struct rsn_pmksa_cache_entry *entry, *prev = NULL, *tmp;
244 	entry = pmksa->pmksa;
245 	while (entry) {
246 		if (entry->network_ctx == network_ctx || network_ctx == NULL) {
247 			wpa_printf(MSG_DEBUG, "RSN: Flush PMKSA cache entry "
248 				   "for " MACSTR, MAC2STR(entry->aa));
250 				prev->next = entry->next;
252 				pmksa->pmksa = entry->next;
253 			tmp = entry;
254 			entry = entry->next;
258 			prev = entry;
259 			entry = entry->next;
273 	struct rsn_pmksa_cache_entry *entry, *prev;
278 	entry = pmksa->pmksa;
280 	while (entry) {
281 		prev = entry;
282 		entry = entry->next;
291  * pmksa_cache_get - Fetch a PMKSA cache entry
296  * Returns: Pointer to PMKSA cache entry or %NULL if no match was found
302 	struct rsn_pmksa_cache_entry *entry = pmksa->pmksa;
303 	while (entry) {
304 		if ((aa == NULL || os_memcmp(entry->aa, aa, ETH_ALEN) == 0) &&
306 		     os_memcmp(entry->pmkid, pmkid, PMKID_LEN) == 0) &&
307 		    (network_ctx == NULL || network_ctx == entry->network_ctx))
308 			return entry;
309 		entry = entry->next;
337  * pmksa_cache_get_opportunistic - Try to get an opportunistic PMKSA entry
341  * Returns: Pointer to a new PMKSA cache entry or %NULL if not available
343  * Try to create a new PMKSA cache entry opportunistically by guessing that the
345  * already an entry in PMKSA cache.
351 	struct rsn_pmksa_cache_entry *entry = pmksa->pmksa;
356 	while (entry) {
357 		if (entry->network_ctx == network_ctx) {
358 			entry = pmksa_cache_clone_entry(pmksa, entry, aa);
359 			if (entry) {
361 					   "opportunistic PMKSA cache entry "
364 			return entry;
366 		entry = entry->next;
373  * pmksa_cache_get_current - Get the current used PMKSA entry
375  * Returns: Pointer to the current PMKSA cache entry or %NULL if not available
386  * pmksa_cache_clear_current - Clear the current PMKSA entry selection
398  * pmksa_cache_set_current - Set the current PMKSA entry selection
404  * Returns: 0 if PMKSA was found or -1 if no matching entry was found
432 		wpa_hexdump(MSG_DEBUG, "RSN: PMKSA cache entry found - PMKID",
436 	wpa_printf(MSG_DEBUG, "RSN: No PMKSA cache entry found");
455 	struct rsn_pmksa_cache_entry *entry;
466 	entry = pmksa->pmksa;
467 	while (entry) {
470 				  i, MAC2STR(entry->aa));
474 		pos += wpa_snprintf_hex(pos, buf + len - pos, entry->pmkid,
477 				  (int) (entry->expiration - now.sec),
478 				  entry->opportunistic);
482 		entry = entry->next;
490  * @free_cb: Callback function to be called when a PMKSA cache entry is freed
496 pmksa_cache_init(void (*free_cb)(struct rsn_pmksa_cache_entry *entry,