[PATCH 7/7] Adding a simple periodic autoscan module

[Tomasz Bursztyka]

This module will sets a fixed scanning interval.
Thus, the parameter to this module is following this format: <fixed interval>

Signed-hostap: Tomasz Bursztyka <tomasz.bursztyka at linux.intel.com>
---
 wpa_supplicant/Makefile            |    6 +++
 wpa_supplicant/autoscan.c          |    7 ++++
 wpa_supplicant/autoscan_periodic.c |   69 ++++++++++++++++++++++++++++++++++++
 wpa_supplicant/defconfig           |    2 +
 wpa_supplicant/wpa_supplicant.conf |    3 ++
 5 files changed, 87 insertions(+), 0 deletions(-)
 create mode 100644 wpa_supplicant/autoscan_periodic.c

diff --git a/wpa_supplicant/Makefile b/wpa_supplicant/Makefile
index e088685..dc6af35 100644
--- a/wpa_supplicant/Makefile
+++ b/wpa_supplicant/Makefile
@@ -1327,6 +1327,12 @@ OBJS += autoscan_exponential.o
 NEED_AUTOSCAN=y
 endif
 
+ifdef CONFIG_AUTOSCAN_PERIODIC
+CFLAGS += -DCONFIG_AUTOSCAN_PERIODIC
+OBJS += autoscan_periodic.o
+NEED_AUTOSCAN=y
+endif
+
 ifdef NEED_AUTOSCAN
 CFLAGS += -DCONFIG_AUTOSCAN
 OBJS += autoscan.o
diff --git a/wpa_supplicant/autoscan.c b/wpa_supplicant/autoscan.c
index 4abf62a..8a65df3 100644
--- a/wpa_supplicant/autoscan.c
+++ b/wpa_supplicant/autoscan.c
@@ -19,10 +19,17 @@
 extern const struct autoscan_ops autoscan_exponential_ops;
 #endif /* CONFIG_AUTOSCAN_EXPONENTIAL */
 
+#ifdef CONFIG_AUTOSCAN_PERIODIC
+extern const struct autoscan_ops autoscan_periodic_ops;
+#endif /* CONFIG_AUTOSCAN_PERIODIC */
+
 static const struct autoscan_ops * autoscan_modules[] = {
 #ifdef CONFIG_AUTOSCAN_EXPONENTIAL
 	&autoscan_exponential_ops,
 #endif /* CONFIG_AUTOSCAN_EXPONENTIAL */
+#ifdef CONFIG_AUTOSCAN_PERIODIC
+	&autoscan_periodic_ops,
+#endif /* CONFIG_AUTOSCAN_PERIODIC */
 	NULL
 };
 
diff --git a/wpa_supplicant/autoscan_periodic.c b/wpa_supplicant/autoscan_periodic.c
new file mode 100644
index 0000000..887120f
--- /dev/null
+++ b/wpa_supplicant/autoscan_periodic.c
@@ -0,0 +1,69 @@
+/*
+ * WPA Supplicant - auto scan periodic module
+ * Copyright (c) 2012, Intel Corporation. All rights reserved.
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README and COPYING for more details.
+ */
+
+#include "includes.h"
+
+#include "common.h"
+#include "wpa_supplicant_i.h"
+#include "autoscan.h"
+
+
+static int periodic_interval = 0;
+
+static int autoscan_periodic_get_params(const char *params)
+{
+	int interval;
+
+	if (params == NULL)
+		return -1;
+
+	interval = atoi(params);
+
+	if (interval < 0)
+		return -1;
+
+	periodic_interval = interval;
+
+	return 0;
+}
+
+
+static void * autoscan_periodic_init(struct wpa_supplicant *wpa_s,
+				     const char *params)
+{
+	if (autoscan_periodic_get_params(params) < 0)
+		return NULL;
+
+	wpa_printf(MSG_DEBUG, "autoscan periodic: interval is %d",
+		   periodic_interval);
+
+	return &periodic_interval;
+}
+
+
+static void autoscan_periodic_deinit(void *priv)
+{
+	periodic_interval = 0;
+}
+
+
+static int autoscan_periodic_notify_scan(void *priv,
+					 struct wpa_scan_results *scan_res)
+{
+	wpa_printf(MSG_DEBUG, "autoscan periodic: scan result notification");
+
+	return periodic_interval;
+}
+
+
+const struct autoscan_ops autoscan_periodic_ops = {
+	.name = "periodic",
+	.init = autoscan_periodic_init,
+	.deinit = autoscan_periodic_deinit,
+	.notify_scan = autoscan_periodic_notify_scan,
+};
diff --git a/wpa_supplicant/defconfig b/wpa_supplicant/defconfig
index c007909..9addcbf 100644
--- a/wpa_supplicant/defconfig
+++ b/wpa_supplicant/defconfig
@@ -508,3 +508,5 @@ CONFIG_PEERKEY=y
 # Enabling directly a module will enable autoscan support.
 # For exponential module:
 #CONFIG_AUTOSCAN_EXPONENTIAL=y
+# For periodic module:
+#CONFIG_AUTOSCAN_PERIODIC=y
diff --git a/wpa_supplicant/wpa_supplicant.conf b/wpa_supplicant/wpa_supplicant.conf
index 4557467..ccde844 100644
--- a/wpa_supplicant/wpa_supplicant.conf
+++ b/wpa_supplicant/wpa_supplicant.conf
@@ -234,6 +234,9 @@ fast_reauth=1
 #autoscan=exponential:3:300
 # Which means a delay between scans on a base exponential of 3,
 #?up to the limit of 300 seconds (3, 9, 27 ... 300)
+#?For periodic module, parameters would be <fixed interval>
+#autoscan=periodic:30
+#?So a delay of 30 seconds will be applied between each scan
 
 # filter_ssids - SSID-based scan result filtering
 # 0 = do not filter scan results (default)
-- 
1.7.8.6