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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.
Index: wpa_supplicant-0.6.3/wpa_supplicant/scan.c
===================================================================
--- wpa_supplicant-0.6.3.orig/wpa_supplicant/scan.c 2008-07-09 18:53:28.000000000 +0200
+++ wpa_supplicant-0.6.3/wpa_supplicant/scan.c 2008-07-09 19:00:55.000000000 +0200
@@ -48,11 +48,23 @@
int enabled, scan_req = 0, ret;
const u8 *extra_ie = NULL;
size_t extra_ie_len = 0;
+ int scan_ssid_all = 1;
if (wpa_s->disconnected && !wpa_s->scan_req)
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) {
@@ -125,6 +137,10 @@
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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