public void testInterestSelectedDelegation()
{
Link link = new Link();
link.setName(new Name("test"));
link.addDelegation(10, new Name("/test1"));
link.addDelegation(20, new Name("/test2"));
link.addDelegation(100, new Name("/test3"));
try {
keyChain.sign(link, certificateName);
} catch (SecurityException ex) {
Assert.Fail(ex.Message);
}
Blob linkEncoding = link.wireEncode();
Interest interestA = new Interest();
interestA.setLinkWireEncoding(linkEncoding);
Assert.AssertTrue(interestA.getSelectedDelegationIndex() < 0);
interestA.setSelectedDelegationIndex(link.getDelegations().find(
new Name("test2")));
Assert.AssertTrue(interestA.getSelectedDelegationIndex() >= 0);
Link link2 = null;
try {
link2 = interestA.getLink();
} catch (Exception ex_0) {
Assert.Fail(ex_0.Message);
}
Assert.AssertEquals(
new Name("test2"),
link2.getDelegations()
.get(interestA.getSelectedDelegationIndex()).getName());
interestA.setSelectedDelegationIndex(-1);
Assert.AssertTrue(interestA.getSelectedDelegationIndex() < 0);
}
public void testDecodeInterestWithLinkNonDecreasingOrder()
{
Interest interest = new Interest();
Link link = null;
try {
interest.wireDecode(new Blob(InterestWithLinkNonDecreasingOrder,
false));
link = interest.getLink();
} catch (Exception ex) {
Assert.Fail("Decoding InterestWithLinkNonDecreasingOrder: "
+ ex.Message);
}
Assert.AssertTrue(interest.getSelectedDelegationIndex() >= 0);
Assert.AssertEquals(new Name("ndn"),
link.getDelegations()
.get(interest.getSelectedDelegationIndex()).getName());
}
/// <summary>
/// Encode interest using NDN-TLV and return the encoding.
/// </summary>
///
/// <param name="interest">The Interest object to encode.</param>
/// <param name="signedPortionBeginOffset">name component and ends just before the final name component (which is assumed to be a signature for a signed interest).</param>
/// <param name="signedPortionEndOffset">name component and ends just before the final name component (which is assumed to be a signature for a signed interest).</param>
/// <returns>A Blob containing the encoding.</returns>
public override Blob encodeInterest(Interest interest,
int[] signedPortionBeginOffset, int[] signedPortionEndOffset)
{
TlvEncoder encoder = new TlvEncoder();
int saveLength = encoder.getLength();
// Encode backwards.
encoder.writeOptionalNonNegativeIntegerTlv(net.named_data.jndn.encoding.tlv.Tlv.SelectedDelegation,
interest.getSelectedDelegationIndex());
try {
Blob linkWireEncoding = interest.getLinkWireEncoding(this);
if (!linkWireEncoding.isNull())
// Encode the entire link as is.
encoder.writeBuffer(linkWireEncoding.buf());
} catch (EncodingException ex) {
throw new Exception(ex.Message);
}
encoder.writeOptionalNonNegativeIntegerTlvFromDouble(
net.named_data.jndn.encoding.tlv.Tlv.InterestLifetime,
interest.getInterestLifetimeMilliseconds());
// Encode the Nonce as 4 bytes.
if (interest.getNonce().size() == 0) {
// This is the most common case. Generate a nonce.
ByteBuffer nonce = ILOG.J2CsMapping.NIO.ByteBuffer.allocate(4);
random_.nextBytes(nonce.array());
encoder.writeBlobTlv(net.named_data.jndn.encoding.tlv.Tlv.Nonce, nonce);
} else if (interest.getNonce().size() < 4) {
ByteBuffer nonce_0 = ILOG.J2CsMapping.NIO.ByteBuffer.allocate(4);
// Copy existing nonce bytes.
nonce_0.put(interest.getNonce().buf());
// Generate random bytes for remaining bytes in the nonce.
for (int i = 0; i < 4 - interest.getNonce().size(); ++i)
nonce_0.put((byte) random_.Next());
nonce_0.flip();
encoder.writeBlobTlv(net.named_data.jndn.encoding.tlv.Tlv.Nonce, nonce_0);
} else if (interest.getNonce().size() == 4)
// Use the nonce as-is.
encoder.writeBlobTlv(net.named_data.jndn.encoding.tlv.Tlv.Nonce, interest.getNonce().buf());
else {
// Truncate.
ByteBuffer nonce_1 = interest.getNonce().buf();
// buf() returns a new ByteBuffer, so we can change its limit.
nonce_1.limit(nonce_1.position() + 4);
encoder.writeBlobTlv(net.named_data.jndn.encoding.tlv.Tlv.Nonce, nonce_1);
}
encodeSelectors(interest, encoder);
int[] tempSignedPortionBeginOffset = new int[1];
int[] tempSignedPortionEndOffset = new int[1];
encodeName(interest.getName(), tempSignedPortionBeginOffset,
tempSignedPortionEndOffset, encoder);
int signedPortionBeginOffsetFromBack = encoder.getLength()
- tempSignedPortionBeginOffset[0];
int signedPortionEndOffsetFromBack = encoder.getLength()
- tempSignedPortionEndOffset[0];
encoder.writeTypeAndLength(net.named_data.jndn.encoding.tlv.Tlv.Interest, encoder.getLength()
- saveLength);
signedPortionBeginOffset[0] = encoder.getLength()
- signedPortionBeginOffsetFromBack;
signedPortionEndOffset[0] = encoder.getLength()
- signedPortionEndOffsetFromBack;
return new Blob(encoder.getOutput(), false);
}
public void testDecodeInterestWithLink()
{
Interest interest = new Interest();
Link link = null;
try {
interest.wireDecode(new Blob(InterestWithLink, false));
link = interest.getLink();
} catch (Exception ex) {
Assert.Fail("Decoding InterestWithLink: " + ex.Message);
}
Assert.AssertTrue("Interest link object not specified", link != null);
Assert.AssertEquals(new Name("/local/ndn/prefix"), link.getName());
DelegationSet delegations = link.getDelegations();
for (int i = 0; i < delegations.size(); ++i) {
if (i == 0) {
Assert.AssertEquals(10, delegations.get(i).getPreference());
Assert.AssertEquals(new Name("local"), delegations.get(i).getName());
}
if (i == 1) {
Assert.AssertEquals(20, delegations.get(i).getPreference());
Assert.AssertEquals(new Name("ndn"), delegations.get(i).getName());
}
}
Assert.AssertTrue("Interest selected delegation not specified",
interest.getSelectedDelegationIndex() >= 0);
Assert.AssertEquals(new Name("local"),
delegations.get(interest.getSelectedDelegationIndex())
.getName());
}
/// <summary>
/// Decode input as an interest in NDN-TLV and set the fields of the interest
/// object.
/// </summary>
///
/// <param name="interest">The Interest object whose fields are updated.</param>
/// <param name="input"></param>
/// <param name="signedPortionBeginOffset">name component and ends just before the final name component (which is assumed to be a signature for a signed interest).</param>
/// <param name="signedPortionEndOffset">name component and ends just before the final name component (which is assumed to be a signature for a signed interest).</param>
/// <param name="copy">unchanged while the Blob values are used.</param>
/// <exception cref="EncodingException">For invalid encoding.</exception>
public override void decodeInterest(Interest interest, ByteBuffer input,
int[] signedPortionBeginOffset, int[] signedPortionEndOffset,
bool copy)
{
TlvDecoder decoder = new TlvDecoder(input);
int endOffset = decoder.readNestedTlvsStart(net.named_data.jndn.encoding.tlv.Tlv.Interest);
decodeName(interest.getName(), signedPortionBeginOffset,
signedPortionEndOffset, decoder, copy);
if (decoder.peekType(net.named_data.jndn.encoding.tlv.Tlv.Selectors, endOffset))
decodeSelectors(interest, decoder, copy);
// Require a Nonce, but don't force it to be 4 bytes.
ByteBuffer nonce = decoder.readBlobTlv(net.named_data.jndn.encoding.tlv.Tlv.Nonce);
interest.setInterestLifetimeMilliseconds(decoder
.readOptionalNonNegativeIntegerTlv(net.named_data.jndn.encoding.tlv.Tlv.InterestLifetime,
endOffset));
if (decoder.peekType(net.named_data.jndn.encoding.tlv.Tlv.Data, endOffset)) {
// Get the bytes of the Link TLV.
int linkBeginOffset = decoder.getOffset();
int linkEndOffset = decoder.readNestedTlvsStart(net.named_data.jndn.encoding.tlv.Tlv.Data);
decoder.seek(linkEndOffset);
interest.setLinkWireEncoding(
new Blob(decoder.getSlice(linkBeginOffset, linkEndOffset),
copy), this);
} else
interest.unsetLink();
interest.setSelectedDelegationIndex((int) decoder
.readOptionalNonNegativeIntegerTlv(net.named_data.jndn.encoding.tlv.Tlv.SelectedDelegation,
endOffset));
if (interest.getSelectedDelegationIndex() >= 0 && !interest.hasLink())
throw new EncodingException(
"Interest has a selected delegation, but no link object");
// Set the nonce last because setting other interest fields clears it.
interest.setNonce(new Blob(nonce, copy));
decoder.finishNestedTlvs(endOffset);
}