WPS: Allow testing mode to disable 2.0 functionality

Previously, wps_version_number was used only to test extensibility to
newer version numbers, but it can also be used to enable testing of
older versions (1.0), e.g., to avoid hitting some 2.0 specific
validation steps.

Signed-hostap: Jouni Malinen <j@w1.fi>

src/wps/wps_attr_build.c

@@ -201,6 +201,11 @@ int wps_build_wfa_ext(struct wpabuf *msg, int req_to_enroll,
 #ifdef CONFIG_WPS2
 	u8 *len;
 
+#ifdef CONFIG_WPS_TESTING
+	if (WPS_VERSION == 0x10)
+		return 0;
+#endif /* CONFIG_WPS_TESTING */
+
 	if (wpabuf_tailroom(msg) <
 	    7 + 3 + (req_to_enroll ? 3 : 0) +
 	    (auth_macs ? 2 + auth_macs_count * ETH_ALEN : 0))