static int bgscan_learn_load(struct bgscan_learn_data *data)
{
FILE *f;
char buf[128];
struct bgscan_learn_bss *bss;
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;
}
while (fgets(buf, sizeof(buf), f)) {
if (os_strncmp(buf, "BSS ", 4) == 0) {
bss = os_zalloc(sizeof(*bss));
if (!bss) {
continue;
}
if (hwaddr_aton(buf + 4, bss->bssid) < 0) {
bss_free(bss);
continue;
}
bss->freq = atoi(buf + 4 + 18);
dl_list_add(&data->bss, &bss->list);
wpa_printf(MSG_DEBUG, "bgscan learn: Loaded BSS " "entry: " MACSTR " freq=%d", MAC2STR(bss->bssid), bss->freq);
}
if (os_strncmp(buf, "NEIGHBOR ", 9) == 0) {
u8 addr[ETH_ALEN];
if (hwaddr_aton(buf + 9, addr) < 0) {
continue;
}
bss = bgscan_learn_get_bss(data, addr);
if (bss == NULL) {
continue;
}
if (hwaddr_aton(buf + 9 + 18, addr) < 0) {
continue;
}
bgscan_learn_add_neighbor(bss, addr);
}
}
fclose(f);
return 0;
}
static int bgscan_learn_notify_scan(void *priv,
struct wpa_scan_results *scan_res)
{
struct bgscan_learn_data *data = priv;
size_t i, j;
#define MAX_BSS 50
u8 bssid[MAX_BSS * ETH_ALEN];
size_t num_bssid = 0;
wpa_printf(MSG_DEBUG, "bgscan learn: scan result notification");
eloop_cancel_timeout(bgscan_learn_timeout, data, NULL);
eloop_register_timeout(data->scan_interval, 0, bgscan_learn_timeout,
data, NULL);
for (i = 0; i < scan_res->num; i++) {
struct wpa_scan_res *res = scan_res->res[i];
if (!bgscan_learn_bss_match(data, res))
continue;
if (num_bssid < MAX_BSS) {
os_memcpy(bssid + num_bssid * ETH_ALEN, res->bssid,
ETH_ALEN);
num_bssid++;
}
}
wpa_printf(MSG_DEBUG, "bgscan learn: %u matching BSSes in scan "
"results", (unsigned int) num_bssid);
for (i = 0; i < scan_res->num; i++) {
struct wpa_scan_res *res = scan_res->res[i];
struct bgscan_learn_bss *bss;
if (!bgscan_learn_bss_match(data, res))
continue;
bss = bgscan_learn_get_bss(data, res->bssid);
if (bss && bss->freq != res->freq) {
wpa_printf(MSG_DEBUG, "bgscan learn: Update BSS "
MACSTR " freq %d -> %d",
MAC2STR(res->bssid), bss->freq, res->freq);
bss->freq = res->freq;
} else if (!bss) {
wpa_printf(MSG_DEBUG, "bgscan learn: Add BSS " MACSTR
" freq=%d", MAC2STR(res->bssid), res->freq);
bss = os_zalloc(sizeof(*bss));
if (!bss)
continue;
os_memcpy(bss->bssid, res->bssid, ETH_ALEN);
bss->freq = res->freq;
dl_list_add(&data->bss, &bss->list);
}
for (j = 0; j < num_bssid; j++) {
u8 *addr = bssid + j * ETH_ALEN;
bgscan_learn_add_neighbor(bss, addr);
}
}
/*
* A more advanced bgscan could process scan results internally, select
* the BSS and request roam if needed. This sample uses the existing
* BSS/ESS selection routine. Change this to return 1 if selection is
* done inside the bgscan module.
*/
return 0;
}