1 files changed, 111 insertions, 0 deletions
diff --git a/src/org/xbill/DNS/NXTRecord.java b/src/org/xbill/DNS/NXTRecord.java
new file mode 100644
index 0000000..ad04e01
--- /dev/null
+++ b/src/org/xbill/DNS/NXTRecord.java
@@ -0,0 +1,111 @@
+// Copyright (c) 1999-2004 Brian Wellington (bwelling@xbill.org)
+
+package org.xbill.DNS;
+
+import java.io.*;
+import java.util.*;
+
+/**
+ * Next name - this record contains the following name in an ordered list
+ * of names in the zone, and a set of types for which records exist for
+ * this name.  The presence of this record in a response signifies a
+ * failed query for data in a DNSSEC-signed zone. 
+ *
+ * @author Brian Wellington
+ */
+
+public class NXTRecord extends Record {
+
+private static final long serialVersionUID = -8851454400765507520L;
+
+private Name next;
+private BitSet bitmap;
+
+NXTRecord() {}
+
+Record
+getObject() {
+	return new NXTRecord();
+}
+
+/**
+ * Creates an NXT Record from the given data
+ * @param next The following name in an ordered list of the zone
+ * @param bitmap The set of type for which records exist at this name
+*/
+public
+NXTRecord(Name name, int dclass, long ttl, Name next, BitSet bitmap) {
+	super(name, Type.NXT, dclass, ttl);
+	this.next = checkName("next", next);
+	this.bitmap = bitmap;
+}
+
+void
+rrFromWire(DNSInput in) throws IOException {
+	next = new Name(in);
+	bitmap = new BitSet();
+	int bitmapLength = in.remaining();
+	for (int i = 0; i < bitmapLength; i++) {
+		int t = in.readU8();
+		for (int j = 0; j < 8; j++)
+			if ((t & (1 << (7 - j))) != 0)
+				bitmap.set(i * 8 + j);
+	}
+}
+
+void
+rdataFromString(Tokenizer st, Name origin) throws IOException {
+	next = st.getName(origin);
+	bitmap = new BitSet();
+	while (true) {
+		Tokenizer.Token t = st.get();
+		if (!t.isString())
+			break;
+		int typecode = Type.value(t.value, true);
+		if (typecode <= 0 || typecode > 128)
+			throw st.exception("Invalid type: " + t.value);
+		bitmap.set(typecode);
+	}
+	st.unget();
+}
+
+/** Converts rdata to a String */
+String
+rrToString() {
+	StringBuffer sb = new StringBuffer();
+	sb.append(next);
+	int length = bitmap.length();
+	for (short i = 0; i < length; i++)
+		if (bitmap.get(i)) {
+			sb.append(" ");
+			sb.append(Type.string(i));
+		}
+	return sb.toString();
+}
+
+/** Returns the next name */
+public Name
+getNext() {
+	return next;
+}
+
+/** Returns the set of types defined for this name */
+public BitSet
+getBitmap() {
+	return bitmap;
+}
+
+void
+rrToWire(DNSOutput out, Compression c, boolean canonical) {
+	next.toWire(out, null, canonical);
+	int length = bitmap.length();
+	for (int i = 0, t = 0; i < length; i++) {
+		t |= (bitmap.get(i) ? (1 << (7 - i % 8)) : 0);
+		if (i % 8 == 7 || i == length - 1) {
+			out.writeU8(t);
+			t = 0;
+		}
+	}
+}
+
+}