/**
* Looks up Records in the Zone. This follows CNAMEs and wildcards.
*
* @param name The name to look up
* @param type The type to look up
* @return A SetResponse object
* @see SetResponse
*/
public SetResponse findRecords(Name name, short type) {
SetResponse zr = null;
Object o = findSets(name, type);
if (o == null) {
/* The name does not exist */
if (name.isWild()) return SetResponse.ofType(SetResponse.NXDOMAIN);
int labels = name.labels() - origin.labels();
if (labels == 0) return SetResponse.ofType(SetResponse.NXDOMAIN);
if (hasWild) {
SetResponse sr;
Name tname = name;
do {
sr = findRecords(tname.wild(1), type);
if (!sr.isNXDOMAIN()) return sr;
tname = new Name(tname, 1);
} while (labels-- >= 1);
return sr;
} else return SetResponse.ofType(SetResponse.NXDOMAIN);
}
if (o instanceof TypeMap) {
/* The name exists but the type does not. */
return SetResponse.ofType(SetResponse.NXRRSET);
}
Object[] objects;
RRset rrset;
if (o instanceof RRset) {
objects = null;
rrset = (RRset) o;
} else {
objects = (Object[]) o;
rrset = (RRset) objects[0];
}
if (name.equals(rrset.getName())) {
if (type != Type.CNAME && type != Type.ANY && rrset.getType() == Type.CNAME)
zr = new SetResponse(SetResponse.CNAME, rrset);
else if (rrset.getType() == Type.NS && !name.equals(origin))
zr = new SetResponse(SetResponse.DELEGATION, rrset);
else {
zr = new SetResponse(SetResponse.SUCCESSFUL);
zr.addRRset(rrset);
if (objects != null) {
for (int i = 1; i < objects.length; i++) zr.addRRset((RRset) objects[i]);
}
}
} else {
if (rrset.getType() == Type.CNAME) return SetResponse.ofType(SetResponse.NXDOMAIN);
else if (rrset.getType() == Type.DNAME) {
zr = new SetResponse(SetResponse.DNAME, rrset);
} else if (rrset.getType() == Type.NS) {
zr = new SetResponse(SetResponse.DELEGATION, rrset);
}
}
return zr;
}
private synchronized SetResponse lookup(Name name, int type) {
int labels;
int olabels;
int tlabels;
RRset rrset;
Name tname;
Object types;
SetResponse sr;
if (!name.subdomain(origin)) return SetResponse.ofType(SetResponse.NXDOMAIN);
labels = name.labels();
olabels = origin.labels();
for (tlabels = olabels; tlabels <= labels; tlabels++) {
boolean isOrigin = (tlabels == olabels);
boolean isExact = (tlabels == labels);
if (isOrigin) tname = origin;
else if (isExact) tname = name;
else tname = new Name(name, labels - tlabels);
types = exactName(tname);
if (types == null) continue;
/* If this is a delegation, return that. */
if (!isOrigin) {
RRset ns = oneRRset(types, Type.NS);
if (ns != null) return new SetResponse(SetResponse.DELEGATION, ns);
}
/* If this is an ANY lookup, return everything. */
if (isExact && type == Type.ANY) {
sr = new SetResponse(SetResponse.SUCCESSFUL);
RRset[] sets = allRRsets(types);
for (int i = 0; i < sets.length; i++) sr.addRRset(sets[i]);
return sr;
}
/*
* If this is the name, look for the actual type or a CNAME.
* Otherwise, look for a DNAME.
*/
if (isExact) {
rrset = oneRRset(types, type);
if (rrset != null) {
sr = new SetResponse(SetResponse.SUCCESSFUL);
sr.addRRset(rrset);
return sr;
}
rrset = oneRRset(types, Type.CNAME);
if (rrset != null) return new SetResponse(SetResponse.CNAME, rrset);
} else {
rrset = oneRRset(types, Type.DNAME);
if (rrset != null) return new SetResponse(SetResponse.DNAME, rrset);
}
/* We found the name, but not the type. */
if (isExact) return SetResponse.ofType(SetResponse.NXRRSET);
}
if (hasWild) {
for (int i = 0; i < labels - olabels; i++) {
tname = name.wild(i + 1);
types = exactName(tname);
if (types == null) continue;
rrset = oneRRset(types, type);
if (rrset != null) {
sr = new SetResponse(SetResponse.SUCCESSFUL);
sr.addRRset(rrset);
return sr;
}
}
}
return SetResponse.ofType(SetResponse.NXDOMAIN);
}