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-rw-r--r--wpa_supplicant/autoscan_exponential.c101
1 files changed, 101 insertions, 0 deletions
diff --git a/wpa_supplicant/autoscan_exponential.c b/wpa_supplicant/autoscan_exponential.c
new file mode 100644
index 0000000..9cd9921
--- /dev/null
+++ b/wpa_supplicant/autoscan_exponential.c
@@ -0,0 +1,101 @@
+/*
+ * WPA Supplicant - auto scan exponential module
+ * Copyright (c) 2012, Intel Corporation. All rights reserved.
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "includes.h"
+
+#include "common.h"
+#include "wpa_supplicant_i.h"
+#include "autoscan.h"
+
+struct autoscan_exponential_data {
+ struct wpa_supplicant *wpa_s;
+ int base;
+ int limit;
+ int interval;
+};
+
+
+static int
+autoscan_exponential_get_params(struct autoscan_exponential_data *data,
+ const char *params)
+{
+ const char *pos;
+
+ if (params == NULL)
+ return -1;
+
+ data->base = atoi(params);
+
+ pos = os_strchr(params, ':');
+ if (pos == NULL)
+ return -1;
+
+ pos++;
+ data->limit = atoi(pos);
+
+ return 0;
+}
+
+
+static void * autoscan_exponential_init(struct wpa_supplicant *wpa_s,
+ const char *params)
+{
+ struct autoscan_exponential_data *data;
+
+ data = os_zalloc(sizeof(struct autoscan_exponential_data));
+ if (data == NULL)
+ return NULL;
+
+ if (autoscan_exponential_get_params(data, params) < 0) {
+ os_free(data);
+ return NULL;
+ }
+
+ wpa_printf(MSG_DEBUG, "autoscan exponential: base exponential is %d "
+ "and limit is %d", data->base, data->limit);
+
+ data->wpa_s = wpa_s;
+
+ return data;
+}
+
+
+static void autoscan_exponential_deinit(void *priv)
+{
+ struct autoscan_exponential_data *data = priv;
+
+ os_free(data);
+}
+
+
+static int autoscan_exponential_notify_scan(void *priv,
+ struct wpa_scan_results *scan_res)
+{
+ struct autoscan_exponential_data *data = priv;
+
+ wpa_printf(MSG_DEBUG, "autoscan exponential: scan result "
+ "notification");
+
+ if (data->interval >= data->limit)
+ return data->limit;
+
+ if (data->interval <= 0)
+ data->interval = data->base;
+
+ data->interval = data->interval * data->base;
+
+ return data->interval;
+}
+
+
+const struct autoscan_ops autoscan_exponential_ops = {
+ .name = "exponential",
+ .init = autoscan_exponential_init,
+ .deinit = autoscan_exponential_deinit,
+ .notify_scan = autoscan_exponential_notify_scan,
+};