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bgscan learn: Add data file for storing learned network information

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This commit is contained in:
Jouni Malinen 2010-07-10 16:05:31 -07:00
parent c4d71c2505
commit 2e8d6ae32e
1 changed files with 62 additions and 0 deletions
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62
wpa_supplicant/bgscan_learn.c
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@ -31,9 +31,57 @@ struct bgscan_learn_data {
int short_interval; /* use if signal < threshold */
int long_interval; /* use if signal > threshold */
struct os_time last_bgscan;
char *fname;
};
static int bgscan_learn_load(struct bgscan_learn_data *data)
{
FILE *f;
char buf[128];
if (data->fname == NULL)
return 0;
f = fopen(data->fname, "r");
if (f == NULL)
return 0;
wpa_printf(MSG_DEBUG, "bgscan learn: Loading data from %s",
data->fname);
if (fgets(buf, sizeof(buf), f) == NULL ||
os_strncmp(buf, "wpa_supplicant-bgscan-learn\n", 28) != 0) {
wpa_printf(MSG_INFO, "bgscan learn: Invalid data file %s",
data->fname);
fclose(f);
return -1;
}
fclose(f);
return 0;
}
static void bgscan_learn_save(struct bgscan_learn_data *data)
{
FILE *f;
if (data->fname == NULL)
return;
wpa_printf(MSG_DEBUG, "bgscan learn: Saving data to %s",
data->fname);
f = fopen(data->fname, "w");
if (f == NULL)
return;
fprintf(f, "wpa_supplicant-bgscan-learn\n");
fclose(f);
}
static void bgscan_learn_timeout(void *eloop_ctx, void *timeout_ctx)
{
struct bgscan_learn_data *data = eloop_ctx;
@ -85,6 +133,11 @@ static int bgscan_learn_get_params(struct bgscan_learn_data *data,
}
pos++;
data->long_interval = atoi(pos);
pos = os_strchr(pos, ':');
if (pos) {
pos++;
data->fname = os_strdup(pos);
}
return 0;
}
@ -102,6 +155,7 @@ static void * bgscan_learn_init(struct wpa_supplicant *wpa_s,
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;
}
@ -110,6 +164,12 @@ static void * bgscan_learn_init(struct wpa_supplicant *wpa_s,
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,
@ -131,9 +191,11 @@ static void * bgscan_learn_init(struct wpa_supplicant *wpa_s,
static void bgscan_learn_deinit(void *priv)
{
struct bgscan_learn_data *data = priv;
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);
os_free(data);
}