wpa/wpa_supplicant/bss.c

25 #include "bss.h"
63 static void wpa_bss_remove(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
65 	dl_list_del(&bss->list);
66 	dl_list_del(&bss->list_id);
69 		   bss->id, MAC2STR(bss->bssid),
70 		   wpa_ssid_txt(bss->ssid, bss->ssid_len));
71 	wpas_notify_bss_removed(wpa_s, bss->bssid, bss->id);
72 	os_free(bss);
79 	struct wpa_bss *bss;
80 	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
81 		if (os_memcmp(bss->bssid, bssid, ETH_ALEN) == 0 &&
82 		    bss->ssid_len == ssid_len &&
83 		    os_memcmp(bss->ssid, ssid, ssid_len) == 0)
84 			return bss;
119 	struct wpa_bss *bss;
121 	bss = os_zalloc(sizeof(*bss) + res->ie_len + res->beacon_ie_len);
122 	if (bss == NULL)
124 	bss->id = wpa_s->bss_next_id++;
125 	bss->last_update_idx = wpa_s->bss_update_idx;
126 	wpa_bss_copy_res(bss, res);
127 	os_memcpy(bss->ssid, ssid, ssid_len);
128 	bss->ssid_len = ssid_len;
129 	bss->ie_len = res->ie_len;
130 	bss->beacon_ie_len = res->beacon_ie_len;
131 	os_memcpy(bss + 1, res + 1, res->ie_len + res->beacon_ie_len);
133 	dl_list_add_tail(&wpa_s->bss, &bss->list);
134 	dl_list_add_tail(&wpa_s->bss_id, &bss->list_id);
137 		   bss->id, MAC2STR(bss->bssid), wpa_ssid_txt(ssid, ssid_len));
138 	wpas_notify_bss_added(wpa_s, bss->bssid, bss->id);
141 		wpa_bss_remove(wpa_s, dl_list_first(&wpa_s->bss,
174 		wpa_printf(MSG_DEBUG, "bss: %s: cannot compare IEs", __func__);
241 			       const struct wpa_bss *bss)
244 		wpas_notify_bss_freq_changed(wpa_s, bss->id);
247 		wpas_notify_bss_signal_changed(wpa_s, bss->id);
250 		wpas_notify_bss_privacy_changed(wpa_s, bss->id);
253 		wpas_notify_bss_mode_changed(wpa_s, bss->id);
256 		wpas_notify_bss_wpaie_changed(wpa_s, bss->id);
259 		wpas_notify_bss_rsnie_changed(wpa_s, bss->id);
262 		wpas_notify_bss_wps_changed(wpa_s, bss->id);
265 		wpas_notify_bss_ies_changed(wpa_s, bss->id);
268 		wpas_notify_bss_rates_changed(wpa_s, bss->id);
272 static void wpa_bss_update(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
277 	changes = wpa_bss_compare_res(bss, res);
278 	bss->scan_miss_count = 0;
279 	bss->last_update_idx = wpa_s->bss_update_idx;
280 	wpa_bss_copy_res(bss, res);
282 	dl_list_del(&bss->list);
283 	if (bss->ie_len + bss->beacon_ie_len >=
285 		os_memcpy(bss + 1, res + 1, res->ie_len + res->beacon_ie_len);
286 		bss->ie_len = res->ie_len;
287 		bss->beacon_ie_len = res->beacon_ie_len;
290 		struct dl_list *prev = bss->list_id.prev;
291 		dl_list_del(&bss->list_id);
292 		nbss = os_realloc(bss, sizeof(*bss) + res->ie_len +
295 			bss = nbss;
296 			os_memcpy(bss + 1, res + 1,
298 			bss->ie_len = res->ie_len;
299 			bss->beacon_ie_len = res->beacon_ie_len;
301 		dl_list_add(prev, &bss->list_id);
303 	dl_list_add_tail(&wpa_s->bss, &bss->list);
305 	notify_bss_changes(wpa_s, changes, bss);
309 static int wpa_bss_in_use(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
311 	return bss == wpa_s->current_bss ||
312 		os_memcmp(bss->bssid, wpa_s->bssid, ETH_ALEN) == 0 ||
313 		os_memcmp(bss->bssid, wpa_s->pending_bssid, ETH_ALEN) == 0;
329 	struct wpa_bss *bss;
345 	bss = wpa_bss_get(wpa_s, res->bssid, ssid + 2, ssid[1]);
346 	if (bss == NULL)
349 		wpa_bss_update(wpa_s, bss, res);
353 static int wpa_bss_included_in_scan(const struct wpa_bss *bss,
365 			if (bss->freq == info->freqs[i]) {
379 			    (s->ssid_len == bss->ssid_len &&
380 			     os_memcmp(s->ssid, bss->ssid, bss->ssid_len) ==
397 	struct wpa_bss *bss, *n;
402 	dl_list_for_each_safe(bss, n, &wpa_s->bss, struct wpa_bss, list) {
403 		if (wpa_bss_in_use(wpa_s, bss))
405 		if (!wpa_bss_included_in_scan(bss, info))
407 		if (bss->last_update_idx < wpa_s->bss_update_idx)
408 			bss->scan_miss_count++;
409 		if (bss->scan_miss_count >= WPA_BSS_EXPIRATION_SCAN_COUNT) {
411 				   "match in scan", bss->id);
412 			wpa_bss_remove(wpa_s, bss);
421 	struct wpa_bss *bss, *n;
424 	if (dl_list_empty(&wpa_s->bss))
430 	dl_list_for_each_safe(bss, n, &wpa_s->bss, struct wpa_bss, list) {
431 		if (wpa_bss_in_use(wpa_s, bss))
434 		if (os_time_before(&bss->last_update, &t)) {
436 				   bss->id);
437 			wpa_bss_remove(wpa_s, bss);
448 	dl_list_init(&wpa_s->bss);
458 	struct wpa_bss *bss, *n;
460 	if (wpa_s->bss.next == NULL)
462 	dl_list_for_each_safe(bss, n, &wpa_s->bss, struct wpa_bss, list)
463 		wpa_bss_remove(wpa_s, bss);
470 	struct wpa_bss *bss;
471 	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
472 		if (os_memcmp(bss->bssid, bssid, ETH_ALEN) == 0)
473 			return bss;
481 	struct wpa_bss *bss;
482 	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
483 		if (bss->id == id)
484 			return bss;
490 const u8 * wpa_bss_get_ie(const struct wpa_bss *bss, u8 ie)
494 	pos = (const u8 *) (bss + 1);
495 	end = pos + bss->ie_len;
509 const u8 * wpa_bss_get_vendor_ie(const struct wpa_bss *bss, u32 vendor_type)
513 	pos = (const u8 *) (bss + 1);
514 	end = pos + bss->ie_len;
529 struct wpabuf * wpa_bss_get_vendor_ie_multi(const struct wpa_bss *bss,
535 	buf = wpabuf_alloc(bss->ie_len);
539 	pos = (const u8 *) (bss + 1);
540 	end = pos + bss->ie_len;
560 int wpa_bss_get_max_rate(const struct wpa_bss *bss)
566 	ie = wpa_bss_get_ie(bss, WLAN_EID_SUPP_RATES);
572 	ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_SUPP_RATES);
582 int wpa_bss_get_bit_rates(const struct wpa_bss *bss, u8 **rates)
589 	ie = wpa_bss_get_ie(bss, WLAN_EID_SUPP_RATES);
590 	ie2 = wpa_bss_get_ie(bss, WLAN_EID_EXT_SUPP_RATES);