int supplicant_dbus_property_set(const char *path, const char *interface,
const char *key, const char *signature,
supplicant_dbus_setup_function setup,
supplicant_dbus_result_function function,
int supplicant_dbus_property_set(const char *path, const char *interface,
const char *key, const char *signature,
supplicant_dbus_setup_function setup,
supplicant_dbus_result_function function,