/** \brief Check the validity of the object
*/
bool socket_resp_arg_t::is_valid() const throw()
{
// check for all the mandatory paramters
if( !domain_present() ) return false;
if( !type_present() ) return false;
if( !listen_addr_present() ) return false;
// return no error
return true;
}
inline bool status_known(file_status f) { return type_present(f) && permissions_present(f); }