/** Gets all options in the OPTRecord with a specific code. This returns a list of byte arrays. */
public List getOptions(int code) {
if (options == null) return Collections.EMPTY_LIST;
List list = null;
for (Iterator it = options.iterator(); it.hasNext(); ) {
Option opt = (Option) it.next();
if (opt.code == code) {
if (list == null) list = new ArrayList();
list.add(opt.data);
}
}
if (list == null) return Collections.EMPTY_LIST;
return list;
}
void rrFromWire(DNSInput in) throws IOException {
if (in.remaining() > 0) options = new ArrayList();
while (in.remaining() > 0) {
int code = in.readU16();
int len = in.readU16();
byte[] data = in.readByteArray(len);
options.add(new Option(code, data));
}
}
void rrToWire(DNSOutput out, Compression c, boolean canonical) {
if (options == null) return;
Iterator it = options.iterator();
while (it.hasNext()) {
Option opt = (Option) it.next();
out.writeU16(opt.code);
out.writeU16(opt.data.length);
out.writeByteArray(opt.data);
}
}