static void *bgscan_learn_init(struct wpa_supplicant *wpa_s, const char *params, const struct wpa_ssid *ssid)
{
struct bgscan_learn_data *data;
data = os_zalloc(sizeof(*data));
if (data == NULL) {
return NULL;
}
dl_list_init(&data->bss);
data->wpa_s = wpa_s;
data->ssid = ssid;
if (bgscan_learn_get_params(data, params) < 0) {
os_free(data->fname);
os_free(data);
return NULL;
}
if (data->short_interval <= 0) {
data->short_interval = 30;
}
if (data->long_interval <= 0) {
data->long_interval = 30;
}
if (bgscan_learn_load(data) < 0) {
os_free(data->fname);
os_free(data);
return NULL;
}
wpa_printf(MSG_DEBUG, "bgscan learn: Signal strength threshold %d " "Short bgscan interval %d Long bgscan interval %d", data->signal_threshold, data->short_interval, data->long_interval);
if (data->signal_threshold && wpa_drv_signal_monitor(wpa_s, data->signal_threshold, 4) < 0) {
wpa_printf(MSG_ERROR, "bgscan learn: Failed to enable " "signal strength monitoring");
}
data->supp_freqs = bgscan_learn_get_supp_freqs(wpa_s);
data->scan_interval = data->short_interval;
if (data->signal_threshold) {
/* Poll for signal info to set initial scan interval */
struct wpa_signal_info siginfo;
if (wpa_drv_signal_poll(wpa_s, &siginfo) == 0 && siginfo.current_signal >= data->signal_threshold) {
data->scan_interval = data->long_interval;
}
}
eloop_register_timeout(data->scan_interval, 0, bgscan_learn_timeout, data, NULL);
/*
* This function is called immediately after an association, so it is
* reasonable to assume that a scan was completed recently. This makes
* us skip an immediate new scan in cases where the current signal
* level is below the bgscan threshold.
*/
os_get_reltime(&data->last_bgscan);
return data;
}
static void bgscan_learn_deinit(void *priv)
{
struct bgscan_learn_data *data = priv;
struct bgscan_learn_bss *bss, *n;
bgscan_learn_save(data);
eloop_cancel_timeout(bgscan_learn_timeout, data, NULL);
if (data->signal_threshold)
wpa_drv_signal_monitor(data->wpa_s, 0, 0);
os_free(data->fname);
dl_list_for_each_safe(bss, n, &data->bss, struct bgscan_learn_bss,
list) {
dl_list_del(&bss->list);
bss_free(bss);
}
os_free(data->supp_freqs);
os_free(data);
}
