int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s,
struct wpa_scan_res *selected,
struct wpa_ssid *ssid)
{
const u8 *sel_uuid, *uuid;
size_t i;
struct wpabuf *wps_ie;
int ret = 0;
if (!eap_is_wps_pbc_enrollee(&ssid->eap))
return 0;
/* Make sure that only one AP is in active PBC mode */
wps_ie = wpa_scan_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE);
if (wps_ie)
sel_uuid = wps_get_uuid_e(wps_ie);
else
sel_uuid = NULL;
for (i = 0; i < wpa_s->scan_res->num; i++) {
struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
struct wpabuf *ie;
if (bss == selected)
continue;
ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
if (!ie)
continue;
if (!wps_is_selected_pbc_registrar(ie)) {
wpabuf_free(ie);
continue;
}
uuid = wps_get_uuid_e(ie);
if (sel_uuid == NULL || uuid == NULL ||
os_memcmp(sel_uuid, uuid, 16) != 0) {
ret = 1; /* PBC overlap */
wpabuf_free(ie);
break;
}
/* TODO: verify that this is reasonable dual-band situation */
wpabuf_free(ie);
}
wpabuf_free(wps_ie);
return ret;
}
int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s,
struct wpa_bss *selected, struct wpa_ssid *ssid)
{
const u8 *sel_uuid, *uuid;
struct wpabuf *wps_ie;
int ret = 0;
struct wpa_bss *bss;
if (!eap_is_wps_pbc_enrollee(&ssid->eap))
return 0;
wpa_printf(MSG_DEBUG, "WPS: Check whether PBC session overlap is "
"present in scan results; selected BSSID " MACSTR,
MAC2STR(selected->bssid));
/* Make sure that only one AP is in active PBC mode */
wps_ie = wpa_bss_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE);
if (wps_ie) {
sel_uuid = wps_get_uuid_e(wps_ie);
wpa_hexdump(MSG_DEBUG, "WPS: UUID of the selected BSS",
sel_uuid, UUID_LEN);
} else {
wpa_printf(MSG_DEBUG, "WPS: Selected BSS does not include "
"WPS IE?!");
sel_uuid = NULL;
}
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
struct wpabuf *ie;
if (bss == selected)
continue;
ie = wpa_bss_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
if (!ie)
continue;
if (!wps_is_selected_pbc_registrar(ie)) {
wpabuf_free(ie);
continue;
}
wpa_printf(MSG_DEBUG, "WPS: Another BSS in active PBC mode: "
MACSTR, MAC2STR(bss->bssid));
uuid = wps_get_uuid_e(ie);
wpa_hexdump(MSG_DEBUG, "WPS: UUID of the other BSS",
uuid, UUID_LEN);
if (sel_uuid == NULL || uuid == NULL ||
os_memcmp(sel_uuid, uuid, UUID_LEN) != 0) {
ret = 1; /* PBC overlap */
wpa_msg(wpa_s, MSG_INFO, "WPS: PBC overlap detected: "
MACSTR " and " MACSTR,
MAC2STR(selected->bssid),
MAC2STR(bss->bssid));
wpabuf_free(ie);
break;
}
/* TODO: verify that this is reasonable dual-band situation */
wpabuf_free(ie);
}
wpabuf_free(wps_ie);
return ret;
}
