FILS: Claim FILS capability only if driver supports it

"GET_CAPABILITY fils" used to return "FILS" based on wpa_supplicant
configuration. This can be made more useful by checking both for
wpa_supplicant and driver support for FILS.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

src/drivers/driver.h

@@ -1311,6 +1311,8 @@ struct wpa_driver_capa {
 #define WPA_DRIVER_FLAGS_FULL_AP_CLIENT_STATE	0x0000010000000000ULL
 /** Driver supports P2P Listen offload */
 #define WPA_DRIVER_FLAGS_P2P_LISTEN_OFFLOAD     0x0000020000000000ULL
+/** Driver supports FILS */
+#define WPA_DRIVER_FLAGS_SUPPORT_FILS		0x0000040000000000ULL
 	u64 flags;
 
 #define FULL_AP_CLIENT_STATE_SUPP(drv_flags) \

wpa_supplicant/ctrl_iface.c

@@ -4048,7 +4048,8 @@ static int wpa_supplicant_ctrl_iface_get_capability(
 #endif /* CONFIG_ACS */
 
 #ifdef CONFIG_FILS
-	if (os_strcmp(field, "fils") == 0) {
+	if (os_strcmp(field, "fils") == 0 &&
+	    (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SUPPORT_FILS)) {
 		res = os_snprintf(buf, buflen, "FILS");
 		if (os_snprintf_error(buflen, res))
 			return -1;