/**
* wpa_bss_get_bssid - Fetch a BSS table entry based on BSSID
* @wpa_s: Pointer to wpa_supplicant data
* @bssid: BSSID
* Returns: Pointer to the BSS entry or %NULL if not found
*/
struct wpa_bss * wpa_bss_get_bssid(struct wpa_supplicant *wpa_s,
const u8 *bssid)
{
struct wpa_bss *bss;
if (!wpa_supplicant_filter_bssid_match(wpa_s, bssid))
return NULL;
dl_list_for_each_reverse(bss, &wpa_s->bss, struct wpa_bss, list) {
if (os_memcmp(bss->bssid, bssid, ETH_ALEN) == 0)
return bss;
}
return NULL;
}
/**
* wpa_bss_get - Fetch a BSS table entry based on BSSID and SSID
* @wpa_s: Pointer to wpa_supplicant data
* @bssid: BSSID
* @ssid: SSID
* @ssid_len: Length of @ssid
* Returns: Pointer to the BSS entry or %NULL if not found
*/
struct wpa_bss * wpa_bss_get(struct wpa_supplicant *wpa_s, const u8 *bssid,
const u8 *ssid, size_t ssid_len)
{
struct wpa_bss *bss;
if (!wpa_supplicant_filter_bssid_match(wpa_s, bssid))
return NULL;
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
if (os_memcmp(bss->bssid, bssid, ETH_ALEN) == 0 &&
bss->ssid_len == ssid_len &&
os_memcmp(bss->ssid, ssid, ssid_len) == 0)
return bss;
}
return NULL;
}
/**
* wpa_bss_get_bssid_latest - Fetch the latest BSS table entry based on BSSID
* @wpa_s: Pointer to wpa_supplicant data
* @bssid: BSSID
* Returns: Pointer to the BSS entry or %NULL if not found
*
* This function is like wpa_bss_get_bssid(), but full BSS table is iterated to
* find the entry that has the most recent update. This can help in finding the
* correct entry in cases where the SSID of the AP may have changed recently
* (e.g., in WPS reconfiguration cases).
*/
struct wpa_bss * wpa_bss_get_bssid_latest(struct wpa_supplicant *wpa_s,
const u8 *bssid)
{
struct wpa_bss *bss, *found = NULL;
if (!wpa_supplicant_filter_bssid_match(wpa_s, bssid))
return NULL;
dl_list_for_each_reverse(bss, &wpa_s->bss, struct wpa_bss, list) {
if (os_memcmp(bss->bssid, bssid, ETH_ALEN) != 0)
continue;
if (found == NULL ||
os_reltime_before(&found->last_update, &bss->last_update))
found = bss;
}
return found;
}
static void filter_scan_res(struct wpa_supplicant *wpa_s,
struct wpa_scan_results *res)
{
size_t i, j;
if (wpa_s->bssid_filter == NULL)
return;
for (i = 0, j = 0; i < res->num; i++) {
if (wpa_supplicant_filter_bssid_match(wpa_s,
res->res[i]->bssid)) {
res->res[j++] = res->res[i];
} else {
os_free(res->res[i]);
res->res[i] = NULL;
}
}
if (res->num != j) {
wpa_printf(MSG_DEBUG, "Filtered out %d scan results",
(int) (res->num - j));
res->num = j;
}
}
