return errCannotUnmarshalDNSMessage
		}
	}
}

// extractExtendedRCode extracts the extended RCode from the OPT resource (EDNS(0))
// If an OPT record is not found, the RCode from the hdr is returned.
// Another return value indicates whether an additional resource was found.
func extractExtendedRCode(p dnsmessage.Parser, hdr dnsmessage.Header) (dnsmessage.RCode, bool) {
	p.SkipAllAnswers()