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Don't do broadcast SSID scans, if all configured SSIDs use scan_ssid=1. Improves background scanning in supplicant-managed roaming.
--- a/wpa_supplicant/scan.c
+++ b/wpa_supplicant/scan.c
@@ -73,6 +73,7 @@ static void wpa_supplicant_scan(void *el
struct wpabuf *wps_ie = NULL;
const u8 *extra_ie = NULL;
size_t extra_ie_len = 0;
+ int scan_ssid_all = 1;
int wps = 0;
#ifdef CONFIG_WPS
enum wps_request_type req_type = WPS_REQ_ENROLLEE_INFO;
@@ -82,6 +83,17 @@ static void wpa_supplicant_scan(void *el
return;
enabled = 0;
+
+ /* check if all configured ssids should be scanned directly */
+ ssid = wpa_s->conf->ssid;
+ while (ssid) {
+ if (!ssid->scan_ssid) {
+ scan_ssid_all = 0;
+ break;
+ }
+ ssid = ssid->next;
+ }
+
ssid = wpa_s->conf->ssid;
while (ssid) {
if (!ssid->disabled) {
@@ -154,6 +166,10 @@ static void wpa_supplicant_scan(void *el
return;
}
+ if (scan_ssid_all && !ssid) {
+ ssid = wpa_s->conf->ssid;
+ }
+
wpa_printf(MSG_DEBUG, "Starting AP scan (%s SSID)",
ssid ? "specific": "broadcast");
if (ssid) {
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