/**
* wpa_supplicant_get_scan_results - Get scan results
* @wpa_s: Pointer to wpa_supplicant data
* @info: Information about what was scanned or %NULL if not available
* @new_scan: Whether a new scan was performed
* Returns: Scan results, %NULL on failure
*
* This function request the current scan results from the driver and updates
* the local BSS list wpa_s->bss. The caller is responsible for freeing the
* results with wpa_scan_results_free().
*/
struct wpa_scan_results *
wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s,
struct scan_info *info, int new_scan)
{
struct wpa_scan_results *scan_res;
size_t i;
int (*compar)(const void *, const void *) = wpa_scan_result_compar;
scan_res = wpa_drv_get_scan_results2(wpa_s);
if (scan_res == NULL) {
wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results");
return NULL;
}
filter_scan_res(wpa_s, scan_res);
#ifdef CONFIG_WPS
if (wpas_wps_in_progress(wpa_s)) {
wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Order scan results with WPS "
"provisioning rules");
compar = wpa_scan_result_wps_compar;
}
#endif /* CONFIG_WPS */
qsort(scan_res->res, scan_res->num, sizeof(struct wpa_scan_res *),
compar);
dump_scan_res(scan_res);
wpa_bss_update_start(wpa_s);
for (i = 0; i < scan_res->num; i++)
wpa_bss_update_scan_res(wpa_s, scan_res->res[i]);
wpa_bss_update_end(wpa_s, info, new_scan);
return scan_res;
}
/**
* wpa_supplicant_get_scan_results - Get scan results
* @wpa_s: Pointer to wpa_supplicant data
* @info: Information about what was scanned or %NULL if not available
* @new_scan: Whether a new scan was performed
* Returns: Scan results, %NULL on failure
*
* This function request the current scan results from the driver and updates
* the local BSS list wpa_s->bss. The caller is responsible for freeing the
* results with wpa_scan_results_free().
*/
struct wpa_scan_results *
wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s,
struct scan_info *info, int new_scan)
{
struct wpa_scan_results *scan_res;
size_t i;
int (*compar)(const void *, const void *) = wpa_scan_result_compar;
scan_res = wpa_drv_get_scan_results2(wpa_s);
if (scan_res == NULL) {
wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results");
return NULL;
}
if (scan_res->fetch_time.sec == 0) {
/*
* Make sure we have a valid timestamp if the driver wrapper
* does not set this.
*/
os_get_time(&scan_res->fetch_time);
}
filter_scan_res(wpa_s, scan_res);
#ifdef CONFIG_WPS
if (wpas_wps_in_progress(wpa_s)) {
wpa_dbg(wpa_s, MSG_DEBUG, "WPS: Order scan results with WPS "
"provisioning rules");
compar = wpa_scan_result_wps_compar;
}
#endif /* CONFIG_WPS */
qsort(scan_res->res, scan_res->num, sizeof(struct wpa_scan_res *),
compar);
dump_scan_res(scan_res);
wpa_bss_update_start(wpa_s);
for (i = 0; i < scan_res->num; i++)
wpa_bss_update_scan_res(wpa_s, scan_res->res[i],
&scan_res->fetch_time);
wpa_bss_update_end(wpa_s, info, new_scan);
return scan_res;
}
static int wnm_fetch_scan_results(struct wpa_supplicant *wpa_s)
{
struct wpa_scan_results *scan_res;
struct wpa_bss *bss;
struct wpa_ssid *ssid = wpa_s->current_ssid;
u8 i, found = 0;
size_t j;
wpa_dbg(wpa_s, MSG_DEBUG,
"WNM: Fetch current scan results from the driver for checking transition candidates");
scan_res = wpa_drv_get_scan_results2(wpa_s);
if (!scan_res) {
wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Failed to get scan results");
return 0;
}
if (scan_res->fetch_time.sec == 0)
os_get_reltime(&scan_res->fetch_time);
filter_scan_res(wpa_s, scan_res);
for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
struct neighbor_report *nei;
nei = &wpa_s->wnm_neighbor_report_elements[i];
if (nei->preference_present && nei->preference == 0)
continue;
for (j = 0; j < scan_res->num; j++) {
struct wpa_scan_res *res;
const u8 *ssid_ie;
res = scan_res->res[j];
if (os_memcmp(nei->bssid, res->bssid, ETH_ALEN) != 0 ||
res->age > WNM_SCAN_RESULT_AGE * 1000)
continue;
bss = wpa_s->current_bss;
ssid_ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
if (bss && ssid_ie &&
(bss->ssid_len != ssid_ie[1] ||
os_memcmp(bss->ssid, ssid_ie + 2,
bss->ssid_len) != 0))
continue;
/* Potential candidate found */
found = 1;
scan_snr(res);
scan_est_throughput(wpa_s, res);
wpa_bss_update_scan_res(wpa_s, res,
&scan_res->fetch_time);
}
}
wpa_scan_results_free(scan_res);
if (!found) {
wpa_dbg(wpa_s, MSG_DEBUG,
"WNM: No transition candidate matches existing scan results");
return 0;
}
bss = compare_scan_neighbor_results(wpa_s, WNM_SCAN_RESULT_AGE, NULL);
if (!bss) {
wpa_dbg(wpa_s, MSG_DEBUG,
"WNM: Comparison of scan results against transition candidates did not find matches");
return 0;
}
/* Associate to the network */
wnm_bss_tm_connect(wpa_s, bss, ssid, 0);
return 1;
}
