private Record parseRR(MyStringTokenizer st, boolean useLast, Record last, Name origin)
throws IOException {
Name name;
int ttl;
short type, dclass;
if (!useLast) name = new Name(st.nextToken(), origin);
else name = last.getName();
String s = st.nextToken();
try {
ttl = TTL.parseTTL(s);
s = st.nextToken();
} catch (NumberFormatException e) {
if (!useLast || last == null) ttl = defaultTTL;
else ttl = last.getTTL();
}
if ((dclass = DClass.value(s)) > 0) s = st.nextToken();
else dclass = DClass.IN;
if ((type = Type.value(s)) < 0) throw new IOException("Parse error");
return Record.fromString(name, type, dclass, ttl, st, origin);
}
private void parseInclude(MyStringTokenizer st) throws IOException {
if (!st.hasMoreTokens()) throw new IOException("Missing file to include");
File newfile;
String filename = st.nextToken();
if (file.getParent() == null) newfile = new File(filename);
else newfile = new File(file.getParent(), filename);
if (st.hasMoreTokens()) included = new Master(newfile, new Name(st.nextToken()));
else included = new Master(newfile, origin);
}
KEYRecord(Name _name, short _dclass, int _ttl, MyStringTokenizer st, Name origin)
throws IOException {
super(_name, Type.KEY, _dclass, _ttl);
flags = (short) Integer.decode(st.nextToken()).intValue();
proto = (byte) Integer.parseInt(st.nextToken());
alg = (byte) Integer.parseInt(st.nextToken());
/* If this is a null key, there's no key data */
if (!((flags & (FLAG_NOKEY)) == (FLAG_NOKEY))) key = base64.fromString(st.remainingTokens());
else key = null;
}
Record rdataFromString(Name name, short dclass, int ttl, MyStringTokenizer st, Name origin)
throws TextParseException {
SIGRecord rec = new SIGRecord(name, dclass, ttl);
rec.covered = Type.value(st.nextToken());
rec.alg = Byte.parseByte(st.nextToken());
rec.labels = Byte.parseByte(st.nextToken());
rec.origttl = TTL.parseTTL(st.nextToken());
rec.expire = parseDate(st.nextToken());
rec.timeSigned = parseDate(st.nextToken());
rec.footprint = (short) Integer.parseInt(st.nextToken());
rec.signer = Name.fromString(st.nextToken(), origin);
if (st.hasMoreTokens()) rec.signature = base64.fromString(st.remainingTokens());
return rec;
}
/** Returns the next record in the master file */
public Record nextRecord() throws IOException {
String line;
MyStringTokenizer st;
if (included != null) {
Record rec = included.nextRecord();
if (rec != null) return rec;
included = null;
}
while (true) {
line = readExtendedLine(br);
if (line == null) return null;
if (line.length() == 0 || line.startsWith(";")) continue;
boolean space = line.startsWith(" ") || line.startsWith("\t");
st = new MyStringTokenizer(line);
String s = st.nextToken();
if (s.equals("$ORIGIN")) {
origin = parseOrigin(st);
continue;
}
if (s.equals("$TTL")) {
defaultTTL = parseTTL(st);
continue;
}
if (s.equals("$INCLUDE")) {
parseInclude(st);
/*
* If we continued, we wouldn't be looking in
* the new file. Recursing works better.
*/
return nextRecord();
} else if (s.charAt(0) == '$') throw new IOException("Invalid directive: " + s);
st.putBackToken(s);
return (last = parseRR(st, space, last, origin));
}
}
private Name parseOrigin(MyStringTokenizer st) throws IOException {
if (!st.hasMoreTokens()) throw new IOException("Missing ORIGIN");
return new Name(st.nextToken());
}
private int parseTTL(MyStringTokenizer st) throws IOException {
if (!st.hasMoreTokens()) throw new IOException("Missing TTL");
return Integer.parseInt(st.nextToken());
}