Fix regression in RSN pre-authentication candidate list generation

Processing of the scan results for RSN pre-authentication candidates
was moved to happen before the network was selected. This resulted in
all candidates being dropped due to no SSID having been configured.
Fix this by moving the processing to happen after the network has
been selected. Since the raw scan results are not available at that
point, use the BSS table instead of scan results to fetch the
information.

wpa_supplicant/events.c

@@ -756,28 +756,25 @@ wpa_supplicant_pick_new_network(struct wpa_supplicant *wpa_s)
 /* TODO: move the rsn_preauth_scan_result*() to be called from notify.c based
  * on BSS added and BSS changed events */
 static void wpa_supplicant_rsn_preauth_scan_results(
-	struct wpa_supplicant *wpa_s, struct wpa_scan_results *scan_res)
+	struct wpa_supplicant *wpa_s)
 {
-	int i;
+	struct wpa_bss *bss;
 
 	if (rsn_preauth_scan_results(wpa_s->wpa) < 0)
 		return;
 
-	for (i = scan_res->num - 1; i >= 0; i--) {
+	dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 		const u8 *ssid, *rsn;
-		struct wpa_scan_res *r;
-
-		r = scan_res->res[i];
 
-		ssid = wpa_scan_get_ie(r, WLAN_EID_SSID);
+		ssid = wpa_bss_get_ie(bss, WLAN_EID_SSID);
 		if (ssid == NULL)
 			continue;
 
-		rsn = wpa_scan_get_ie(r, WLAN_EID_RSN);
+		rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 		if (rsn == NULL)
 			continue;
 
-		rsn_preauth_scan_result(wpa_s->wpa, r->bssid, ssid, rsn);
+		rsn_preauth_scan_result(wpa_s->wpa, bss->bssid, ssid, rsn);
 	}
 
 }
@@ -945,8 +942,6 @@ static int _wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
 		return 0;
 	}
 
-	wpa_supplicant_rsn_preauth_scan_results(wpa_s, scan_res);
-
 	selected = wpa_supplicant_pick_network(wpa_s, scan_res, &ssid);
 
 	if (selected) {
@@ -957,6 +952,7 @@ static int _wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
 		if (skip)
 			return 0;
 		wpa_supplicant_connect(wpa_s, selected, ssid);
+		wpa_supplicant_rsn_preauth_scan_results(wpa_s);
 	} else {
 		wpa_scan_results_free(scan_res);
 		wpa_dbg(wpa_s, MSG_DEBUG, "No suitable network found");
@@ -964,6 +960,7 @@ static int _wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
 		if (ssid) {
 			wpa_dbg(wpa_s, MSG_DEBUG, "Setup a new network");
 			wpa_supplicant_associate(wpa_s, NULL, ssid);
+			wpa_supplicant_rsn_preauth_scan_results(wpa_s);
 		} else {
 			int timeout_sec = wpa_s->scan_interval;
 			int timeout_usec = 0;