static struct wpa_bss * wpa_bss_add(struct wpa_supplicant *wpa_s,
const u8 *ssid, size_t ssid_len,
struct wpa_scan_res *res)
{
struct wpa_bss *bss;
bss = os_zalloc(sizeof(*bss) + res->ie_len + res->beacon_ie_len);
if (bss == NULL)
return NULL;
bss->id = wpa_s->bss_next_id++;
bss->last_update_idx = wpa_s->bss_update_idx;
wpa_bss_copy_res(bss, res);
os_memcpy(bss->ssid, ssid, ssid_len);
bss->ssid_len = ssid_len;
bss->ie_len = res->ie_len;
bss->beacon_ie_len = res->beacon_ie_len;
os_memcpy(bss + 1, res + 1, res->ie_len + res->beacon_ie_len);
wpa_bss_set_hessid(bss);
dl_list_add_tail(&wpa_s->bss, &bss->list);
dl_list_add_tail(&wpa_s->bss_id, &bss->list_id);
wpa_s->num_bss++;
wpa_dbg(wpa_s, MSG_DEBUG, "BSS: Add new id %u BSSID " MACSTR
" SSID '%s'",
bss->id, MAC2STR(bss->bssid), wpa_ssid_txt(ssid, ssid_len));
wpas_notify_bss_added(wpa_s, bss->bssid, bss->id);
if (wpa_s->num_bss > wpa_s->conf->bss_max_count &&
wpa_bss_remove_oldest(wpa_s) != 0) {
wpa_printf(MSG_ERROR, "Increasing the MAX BSS count to %d "
"because all BSSes are in use. We should normally "
"not get here!", (int) wpa_s->num_bss);
wpa_s->conf->bss_max_count = wpa_s->num_bss;
}
return bss;
}
static struct wpa_bss *
wpa_bss_update(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
struct wpa_scan_res *res, struct os_reltime *fetch_time)
{
u32 changes;
changes = wpa_bss_compare_res(bss, res);
if (changes & WPA_BSS_FREQ_CHANGED_FLAG)
wpa_printf(MSG_DEBUG, "BSS: " MACSTR " changed freq %d --> %d",
MAC2STR(bss->bssid), bss->freq, res->freq);
bss->scan_miss_count = 0;
bss->last_update_idx = wpa_s->bss_update_idx;
wpa_bss_copy_res(bss, res, fetch_time);
/* Move the entry to the end of the list */
dl_list_del(&bss->list);
#ifdef CONFIG_P2P
if (wpa_bss_get_vendor_ie(bss, P2P_IE_VENDOR_TYPE) &&
!wpa_scan_get_vendor_ie(res, P2P_IE_VENDOR_TYPE)) {
/*
* This can happen when non-P2P station interface runs a scan
* without P2P IE in the Probe Request frame. P2P GO would reply
* to that with a Probe Response that does not include P2P IE.
* Do not update the IEs in this BSS entry to avoid such loss of
* information that may be needed for P2P operations to
* determine group information.
*/
wpa_dbg(wpa_s, MSG_DEBUG, "BSS: Do not update scan IEs for "
MACSTR " since that would remove P2P IE information",
MAC2STR(bss->bssid));
} else
#endif /* CONFIG_P2P */
if (bss->ie_len + bss->beacon_ie_len >=
res->ie_len + res->beacon_ie_len) {
os_memcpy(bss + 1, res + 1, res->ie_len + res->beacon_ie_len);
bss->ie_len = res->ie_len;
bss->beacon_ie_len = res->beacon_ie_len;
} else {
struct wpa_bss *nbss;
struct dl_list *prev = bss->list_id.prev;
dl_list_del(&bss->list_id);
nbss = os_realloc(bss, sizeof(*bss) + res->ie_len +
res->beacon_ie_len);
if (nbss) {
unsigned int i;
for (i = 0; i < wpa_s->last_scan_res_used; i++) {
if (wpa_s->last_scan_res[i] == bss) {
wpa_s->last_scan_res[i] = nbss;
break;
}
}
if (wpa_s->current_bss == bss)
wpa_s->current_bss = nbss;
wpa_bss_update_pending_connect(wpa_s, bss, nbss);
bss = nbss;
os_memcpy(bss + 1, res + 1,
res->ie_len + res->beacon_ie_len);
bss->ie_len = res->ie_len;
bss->beacon_ie_len = res->beacon_ie_len;
}
dl_list_add(prev, &bss->list_id);
}
if (changes & WPA_BSS_IES_CHANGED_FLAG)
wpa_bss_set_hessid(bss);
dl_list_add_tail(&wpa_s->bss, &bss->list);
notify_bss_changes(wpa_s, changes, bss);
return bss;
}
