From 4aa8186806dbc6774305ab94d63ef7f202f430d1 Mon Sep 17 00:00:00 2001
From: Sheng Fang <fsheng@codeaurora.org>
Date: Tue, 7 May 2013 12:41:14 +0300
Subject: [PATCH] Add a configration parameter for sched_scan interval

The new sched_scan_interval parameter can be used to set the default
sched_scan interval, e.g., for power saving purposes.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
---
 wpa_supplicant/config.c      | 1 +
 wpa_supplicant/config.h      | 5 +++++
 wpa_supplicant/config_file.c | 4 ++++
 wpa_supplicant/scan.c        | 4 +++-
 4 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/wpa_supplicant/config.c b/wpa_supplicant/config.c
index aceaa02b1..b25e0f673 100644
--- a/wpa_supplicant/config.c
+++ b/wpa_supplicant/config.c
@@ -3105,6 +3105,7 @@ static const struct global_parse_data global_fields[] = {
 	{ FUNC(ap_vendor_elements), 0 },
 	{ INT_RANGE(ignore_old_scan_res, 0, 1), 0 },
 	{ FUNC(freq_list), 0 },
+	{ INT(sched_scan_interval), 0 },
 };
 
 #undef FUNC
diff --git a/wpa_supplicant/config.h b/wpa_supplicant/config.h
index cdaaa8948..a1a523992 100644
--- a/wpa_supplicant/config.h
+++ b/wpa_supplicant/config.h
@@ -862,6 +862,11 @@ struct wpa_config {
 	 * allowing it to update the internal BSS table.
 	 */
 	int ignore_old_scan_res;
+
+	/**
+	 * sched_scan_interval -  schedule scan interval
+	 */
+	unsigned int sched_scan_interval;
 };
 
 
diff --git a/wpa_supplicant/config_file.c b/wpa_supplicant/config_file.c
index ed6b3f2b5..8ff42852d 100644
--- a/wpa_supplicant/config_file.c
+++ b/wpa_supplicant/config_file.c
@@ -1025,6 +1025,10 @@ static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 		}
 		fprintf(f, "\n");
 	}
+
+	if (config->sched_scan_interval)
+		fprintf(f, "sched_scan_interval=%u\n",
+			config->sched_scan_interval);
 }
 
 #endif /* CONFIG_NO_CONFIG_WRITE */
diff --git a/wpa_supplicant/scan.c b/wpa_supplicant/scan.c
index 8d4c7f1a7..239969244 100644
--- a/wpa_supplicant/scan.c
+++ b/wpa_supplicant/scan.c
@@ -1019,7 +1019,9 @@ int wpa_supplicant_req_sched_scan(struct wpa_supplicant *wpa_s)
 
 	if (!ssid || !wpa_s->prev_sched_ssid) {
 		wpa_dbg(wpa_s, MSG_DEBUG, "Beginning of SSID list");
-
+		if (wpa_s->conf->sched_scan_interval)
+			wpa_s->sched_scan_interval =
+				wpa_s->conf->sched_scan_interval;
 		if (wpa_s->sched_scan_interval == 0)
 			wpa_s->sched_scan_interval = 10;
 		wpa_s->sched_scan_timeout = max_sched_scan_ssids * 2;