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/*
* 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;
else {
data->interval = data->interval * data->base;
if (data->interval > data->limit)
return data->limit;
}
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,
};
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