void rdataFromString(Tokenizer st, Name origin) throws IOException {
String flagString = st.getIdentifier();
flags = Flags.value(flagString);
if (flags < 0) throw st.exception("Invalid flags: " + flagString);
String protoString = st.getIdentifier();
proto = Protocol.value(protoString);
if (proto < 0) throw st.exception("Invalid protocol: " + protoString);
String algString = st.getIdentifier();
alg = DNSSEC.Algorithm.value(algString);
if (alg < 0) throw st.exception("Invalid algorithm: " + algString);
/* If this is a null KEY, there's no key data */
if ((flags & Flags.USE_MASK) == Flags.NOKEY) key = null;
else key = st.getBase64();
}
