/// <summary>
/// Do the work of expressInterest once we know we are connected. Add the entry
/// to the PIT, encode and send the interest.
/// </summary>
///
/// <param name="pendingInterestId"></param>
/// <param name="interestCopy"></param>
/// <param name="onData"></param>
/// <param name="onTimeout"></param>
/// <param name="onNetworkNack"></param>
/// <param name="wireFormat">A WireFormat object used to encode the message.</param>
/// <param name="face"></param>
/// <exception cref="IOException">For I/O error in sending the interest.</exception>
/// <exception cref="System.Exception">If the encoded interest size exceeds getMaxNdnPacketSize().</exception>
internal void expressInterestHelper(long pendingInterestId,
Interest interestCopy, OnData onData, OnTimeout onTimeout,
OnNetworkNack onNetworkNack, WireFormat wireFormat, Face face)
{
PendingInterestTable.Entry pendingInterest = pendingInterestTable_
.add(pendingInterestId, interestCopy, onData, onTimeout,
onNetworkNack);
if (pendingInterest == null)
{
// removePendingInterest was already called with the pendingInterestId.
return;
}
if (onTimeout != null ||
interestCopy.getInterestLifetimeMilliseconds() >= 0.0d)
{
// Set up the timeout.
double delayMilliseconds = interestCopy
.getInterestLifetimeMilliseconds();
if (delayMilliseconds < 0.0d)
{
// Use a default timeout delay.
delayMilliseconds = 4000.0d;
}
face.callLater(delayMilliseconds, new Node.Anonymous_C0(this, pendingInterest));
}
// Special case: For timeoutPrefix_ we don't actually send the interest.
if (!timeoutPrefix_.match(interestCopy.getName()))
{
Blob encoding = interestCopy.wireEncode(wireFormat);
if (encoding.size() > getMaxNdnPacketSize())
{
throw new Exception(
"The encoded interest size exceeds the maximum limit getMaxNdnPacketSize()");
}
transport_.send(encoding.buf());
}
}
static void dumpInterest(Interest interest)
{
Console.Out.WriteLine("name: " + interest.getName().toUri());
Console.Out.WriteLine("minSuffixComponents: " +
(interest.getMinSuffixComponents() >= 0 ?
"" + interest.getMinSuffixComponents() : "<none>"));
Console.Out.WriteLine("maxSuffixComponents: " +
(interest.getMaxSuffixComponents() >= 0 ?
"" + interest.getMaxSuffixComponents() : "<none>"));
Console.Out.Write("keyLocator: ");
if (interest.getKeyLocator().getType() == KeyLocatorType.NONE)
Console.Out.WriteLine("<none>");
else if (interest.getKeyLocator().getType() ==KeyLocatorType.KEY_LOCATOR_DIGEST)
Console.Out.WriteLine("KeyLocatorDigest: " + interest.getKeyLocator().getKeyData().toHex());
else if (interest.getKeyLocator().getType() == KeyLocatorType.KEYNAME)
Console.Out.WriteLine("KeyName: " + interest.getKeyLocator().getKeyName().toUri());
else
Console.Out.WriteLine("<unrecognized ndn_KeyLocatorType>");
Console.Out.WriteLine
("exclude: " + (interest.getExclude().size() > 0 ?
interest.getExclude().toUri() : "<none>"));
Console.Out.WriteLine("lifetimeMilliseconds: " +
(interest.getInterestLifetimeMilliseconds() >= 0 ?
"" + interest.getInterestLifetimeMilliseconds() : "<none>"));
Console.Out.WriteLine("childSelector: " +
(interest.getChildSelector() >= 0 ?
"" + interest.getChildSelector() : "<none>"));
Console.Out.WriteLine("mustBeFresh: " + interest.getMustBeFresh());
Console.Out.WriteLine("nonce: " +
(interest.getNonce().size() > 0 ?
"" + interest.getNonce().toHex() : "<none>"));
}
/// <summary>
/// Append a timestamp component and a random value component to interest's
/// name. This ensures that the timestamp is greater than the timestamp used in
/// the previous call. Then use keyChain to sign the interest which appends a
/// SignatureInfo component and a component with the signature bits. If the
/// interest lifetime is not set, this sets it.
/// </summary>
///
/// <param name="interest">The interest whose name is append with components.</param>
/// <param name="keyChain">The KeyChain for calling sign.</param>
/// <param name="certificateName">The certificate name of the key to use for signing.</param>
/// <param name="wireFormat"></param>
public void generate(Interest interest, KeyChain keyChain,
Name certificateName, WireFormat wireFormat)
{
double timestamp;
lock (lastTimestampLock_) {
timestamp = Math.Round(net.named_data.jndn.util.Common.getNowMilliseconds(),MidpointRounding.AwayFromZero);
while (timestamp <= lastTimestamp_)
timestamp += 1.0d;
// Update the timestamp now while it is locked. In the small chance that
// signing fails, it just means that we have bumped the timestamp.
lastTimestamp_ = timestamp;
}
// The timestamp is encoded as a TLV nonNegativeInteger.
TlvEncoder encoder = new TlvEncoder(8);
encoder.writeNonNegativeInteger((long) timestamp);
interest.getName().append(new Blob(encoder.getOutput(), false));
// The random value is a TLV nonNegativeInteger too, but we know it is 8 bytes,
// so we don't need to call the nonNegativeInteger encoder.
ByteBuffer randomBuffer = ILOG.J2CsMapping.NIO.ByteBuffer.allocate(8);
// Note: SecureRandom is thread safe.
net.named_data.jndn.util.Common.getRandom().nextBytes(randomBuffer.array());
interest.getName().append(new Blob(randomBuffer, false));
keyChain.sign(interest, certificateName, wireFormat);
if (interest.getInterestLifetimeMilliseconds() < 0)
// The caller has not set the interest lifetime, so set it here.
interest.setInterestLifetimeMilliseconds(1000.0d);
}
/// <summary>
/// Create a new PendingInterest and set the timeoutTime_ based on the current
/// time and the interest lifetime.
/// </summary>
///
/// <param name="interest">The interest.</param>
/// <param name="face">packet to the face.</param>
public PendingInterest(Interest interest, Face face)
{
interest_ = interest;
face_ = face;
// Set up timeoutTimeMilliseconds_.
if (interest_.getInterestLifetimeMilliseconds() >= 0.0d)
timeoutTimeMilliseconds_ = net.named_data.jndn.util.Common.getNowMilliseconds()
+ interest_.getInterestLifetimeMilliseconds();
else
// No timeout.
timeoutTimeMilliseconds_ = -1.0d;
}
/// <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);
}
/// <summary>
/// Do the work of expressInterest once we know we are connected. Add the entry
/// to the PIT, encode and send the interest.
/// </summary>
///
/// <param name="pendingInterestId"></param>
/// <param name="interestCopy"></param>
/// <param name="onData"></param>
/// <param name="onTimeout"></param>
/// <param name="onNetworkNack"></param>
/// <param name="wireFormat">A WireFormat object used to encode the message.</param>
/// <param name="face"></param>
/// <exception cref="IOException">For I/O error in sending the interest.</exception>
/// <exception cref="System.Exception">If the encoded interest size exceeds getMaxNdnPacketSize().</exception>
internal void expressInterestHelper(long pendingInterestId,
Interest interestCopy, OnData onData, OnTimeout onTimeout,
OnNetworkNack onNetworkNack, WireFormat wireFormat, Face face)
{
PendingInterestTable.Entry pendingInterest = pendingInterestTable_
.add(pendingInterestId, interestCopy, onData, onTimeout,
onNetworkNack);
if (pendingInterest == null)
// removePendingInterest was already called with the pendingInterestId.
return;
if (onTimeout != null
|| interestCopy.getInterestLifetimeMilliseconds() >= 0.0d) {
// Set up the timeout.
double delayMilliseconds = interestCopy
.getInterestLifetimeMilliseconds();
if (delayMilliseconds < 0.0d)
// Use a default timeout delay.
delayMilliseconds = 4000.0d;
face.callLater(delayMilliseconds, new Node.Anonymous_C0 (this, pendingInterest));
}
// Special case: For timeoutPrefix_ we don't actually send the interest.
if (!timeoutPrefix_.match(interestCopy.getName())) {
Blob encoding = interestCopy.wireEncode(wireFormat);
if (encoding.size() > getMaxNdnPacketSize())
throw new Exception(
"The encoded interest size exceeds the maximum limit getMaxNdnPacketSize()");
transport_.send(encoding.buf());
}
}
private static ArrayList dumpInterest(Interest interest)
{
ArrayList result = new ArrayList();
ILOG.J2CsMapping.Collections.Collections.Add(result,dump("name:", interest.getName().toUri()));
ILOG.J2CsMapping.Collections.Collections.Add(result,dump(
"minSuffixComponents:",
(interest.getMinSuffixComponents() >= 0) ? (Object) (interest.getMinSuffixComponents()) : (Object) ("<none>")));
ILOG.J2CsMapping.Collections.Collections.Add(result,dump(
"maxSuffixComponents:",
(interest.getMaxSuffixComponents() >= 0) ? (Object) (interest.getMaxSuffixComponents()) : (Object) ("<none>")));
if (interest.getKeyLocator().getType() != net.named_data.jndn.KeyLocatorType.NONE) {
if (interest.getKeyLocator().getType() == net.named_data.jndn.KeyLocatorType.KEY_LOCATOR_DIGEST)
ILOG.J2CsMapping.Collections.Collections.Add(result,dump("keyLocator: KeyLocatorDigest:", interest
.getKeyLocator().getKeyData().toHex()));
else if (interest.getKeyLocator().getType() == net.named_data.jndn.KeyLocatorType.KEYNAME)
ILOG.J2CsMapping.Collections.Collections.Add(result,dump("keyLocator: KeyName:", interest
.getKeyLocator().getKeyName().toUri()));
else
ILOG.J2CsMapping.Collections.Collections.Add(result,dump("keyLocator: <unrecognized KeyLocatorType"));
} else
ILOG.J2CsMapping.Collections.Collections.Add(result,dump("keyLocator: <none>"));
ILOG.J2CsMapping.Collections.Collections.Add(result,dump("exclude:", (interest.getExclude().size() > 0) ? interest
.getExclude().toUri() : "<none>"));
ILOG.J2CsMapping.Collections.Collections.Add(result,dump("childSelector:",
(interest.getChildSelector() >= 0) ? (Object) (interest.getChildSelector())
: (Object) ("<none>")));
ILOG.J2CsMapping.Collections.Collections.Add(result,dump("mustBeFresh:", (interest.getMustBeFresh()) ? "true"
: "false"));
ILOG.J2CsMapping.Collections.Collections.Add(result,dump("nonce:", (interest.getNonce().size() == 0) ? "<none>"
: interest.getNonce().toHex()));
ILOG.J2CsMapping.Collections.Collections.Add(result,dump("lifetimeMilliseconds:",
(interest.getInterestLifetimeMilliseconds() < 0) ? "<none>" : ""
+ (long) interest.getInterestLifetimeMilliseconds()));
return result;
}