/// <summary>
/// Create a new Interest with the given name and interest lifetime and "none"
/// for other values.
/// </summary>
///
/// <param name="name">The name for the interest.</param>
/// <param name="interestLifetimeMilliseconds"></param>
public Interest(Name name, double interestLifetimeMilliseconds)
{
this.name_ = new ChangeCounter(new Name());
this.minSuffixComponents_ = -1;
this.maxSuffixComponents_ = -1;
this.keyLocator_ = new ChangeCounter(
new KeyLocator());
this.exclude_ = new ChangeCounter(new Exclude());
this.childSelector_ = -1;
this.mustBeFresh_ = true;
this.interestLifetimeMilliseconds_ = -1;
this.nonce_ = new Blob();
this.getNonceChangeCount_ = 0;
this.lpPacket_ = null;
this.linkWireEncoding_ = new Blob();
this.linkWireEncodingFormat_ = null;
this.link_ = new ChangeCounter(null);
this.selectedDelegationIndex_ = -1;
this.defaultWireEncoding_ = new SignedBlob();
this.getDefaultWireEncodingChangeCount_ = 0;
this.changeCount_ = 0;
if (name != null)
name_.set(new Name(name));
interestLifetimeMilliseconds_ = interestLifetimeMilliseconds;
}
/// <summary>
/// Get the first header field in lpPacket which is an IncomingFaceId. This is
/// an internal method which the application normally would not use.
/// </summary>
///
/// <param name="lpPacket">The LpPacket with the header fields to search.</param>
/// <returns>The first IncomingFaceId header field, or null if not found.</returns>
public static IncomingFaceId getFirstHeader(LpPacket lpPacket)
{
for (int i = 0; i < lpPacket.countHeaderFields(); ++i) {
Object field = lpPacket.getHeaderField(i);
if (field is IncomingFaceId)
return (IncomingFaceId) field;
}
return null;
}
/// <summary>
/// Get the first header field in lpPacket which is a NetworkNack. This is
/// an internal method which the application normally would not use.
/// </summary>
///
/// <param name="lpPacket">The LpPacket with the header fields to search.</param>
/// <returns>The first NetworkNack header field, or null if not found.</returns>
public static NetworkNack getFirstHeader(LpPacket lpPacket)
{
for (int i = 0; i < lpPacket.countHeaderFields(); ++i) {
Object field = lpPacket.getHeaderField(i);
if (field is NetworkNack)
return (NetworkNack) field;
}
return null;
}
/// <summary>
/// Get the first header field in lpPacket which is a CongestionMark. This is
/// an internal method which the application normally would not use.
/// </summary>
///
/// <param name="lpPacket">The LpPacket with the header fields to search.</param>
/// <returns>The first CongestionMark header field, or null if not found.</returns>
static public CongestionMark getFirstHeader(LpPacket lpPacket)
{
for (int i = 0; i < lpPacket.countHeaderFields(); ++i)
{
Object field = lpPacket.getHeaderField(i);
if (field is CongestionMark)
{
return((CongestionMark)field);
}
}
return(null);
}
/// <summary>
/// Create a new Data object with default values and where the signature is a
/// blank Sha256WithRsaSignature.
/// </summary>
///
public Data()
{
this.signature_ = new ChangeCounter(
new Sha256WithRsaSignature());
this.name_ = new ChangeCounter(new Name());
this.metaInfo_ = new ChangeCounter(new MetaInfo());
this.content_ = new Blob();
this.lpPacket_ = null;
this.defaultWireEncoding_ = new SignedBlob();
this.defaultFullName_ = new Name();
this.getDefaultWireEncodingChangeCount_ = 0;
this.changeCount_ = 0;
}
/// <summary>
/// Get the first header field in lpPacket which is an IncomingFaceId. This is
/// an internal method which the application normally would not use.
/// </summary>
///
/// <param name="lpPacket">The LpPacket with the header fields to search.</param>
/// <returns>The first IncomingFaceId header field, or null if not found.</returns>
static public IncomingFaceId getFirstHeader(LpPacket lpPacket)
{
for (int i = 0; i < lpPacket.countHeaderFields(); ++i)
{
Object field = lpPacket.getHeaderField(i);
if (field is IncomingFaceId)
{
return((IncomingFaceId)field);
}
}
return(null);
}
/// <summary>
/// Create a deep copy of the given data object, including a clone of the
/// signature object.
/// </summary>
///
/// <param name="data">The data object to copy.</param>
public Data(Data data)
{
this.signature_ = new ChangeCounter(
new Sha256WithRsaSignature());
this.name_ = new ChangeCounter(new Name());
this.metaInfo_ = new ChangeCounter(new MetaInfo());
this.content_ = new Blob();
this.lpPacket_ = null;
this.defaultWireEncoding_ = new SignedBlob();
this.defaultFullName_ = new Name();
this.getDefaultWireEncodingChangeCount_ = 0;
this.changeCount_ = 0;
try {
signature_
.set((data.signature_ == null) ? (net.named_data.jndn.util.ChangeCountable) (new Sha256WithRsaSignature())
: (net.named_data.jndn.util.ChangeCountable) ((Signature) data.getSignature().Clone()));
} catch (Exception e) {
// We don't expect this to happen, so just treat it as if we got a null pointer.
throw new NullReferenceException(
"Data.setSignature: unexpected exception in clone(): "
+ e.Message);
}
name_.set(new Name(data.getName()));
metaInfo_.set(new MetaInfo(data.getMetaInfo()));
content_ = data.content_;
setDefaultWireEncoding(data.defaultWireEncoding_, null);
}
/// <summary>
/// An internal library method to set the LpPacket for an incoming packet. The
/// application should not call this.
/// </summary>
///
/// <param name="lpPacket">The LpPacket. This does not make a copy.</param>
/// <returns>This Data so that you can chain calls to update values.</returns>
/// @note This is an experimental feature. This API may change in the future.
internal Data setLpPacket(LpPacket lpPacket)
{
lpPacket_ = lpPacket;
// Don't update changeCount_ since this doesn't affect the wire encoding.
return this;
}
/// <summary>
/// Create a new interest as a deep copy of the given interest.
/// </summary>
///
/// <param name="interest">The interest to copy.</param>
public Interest(Interest interest)
{
this.name_ = new ChangeCounter(new Name());
this.minSuffixComponents_ = -1;
this.maxSuffixComponents_ = -1;
this.keyLocator_ = new ChangeCounter(
new KeyLocator());
this.exclude_ = new ChangeCounter(new Exclude());
this.childSelector_ = -1;
this.mustBeFresh_ = true;
this.interestLifetimeMilliseconds_ = -1;
this.nonce_ = new Blob();
this.getNonceChangeCount_ = 0;
this.lpPacket_ = null;
this.linkWireEncoding_ = new Blob();
this.linkWireEncodingFormat_ = null;
this.link_ = new ChangeCounter(null);
this.selectedDelegationIndex_ = -1;
this.defaultWireEncoding_ = new SignedBlob();
this.getDefaultWireEncodingChangeCount_ = 0;
this.changeCount_ = 0;
name_.set(new Name(interest.getName()));
minSuffixComponents_ = interest.minSuffixComponents_;
maxSuffixComponents_ = interest.maxSuffixComponents_;
keyLocator_.set(new KeyLocator(interest.getKeyLocator()));
exclude_.set(new Exclude(interest.getExclude()));
childSelector_ = interest.childSelector_;
mustBeFresh_ = interest.mustBeFresh_;
interestLifetimeMilliseconds_ = interest.interestLifetimeMilliseconds_;
nonce_ = interest.getNonce();
linkWireEncoding_ = interest.linkWireEncoding_;
linkWireEncodingFormat_ = interest.linkWireEncodingFormat_;
if (interest.link_.get() != null)
link_.set(new Link((Link) interest.link_.get()));
selectedDelegationIndex_ = interest.selectedDelegationIndex_;
setDefaultWireEncoding(interest.getDefaultWireEncoding(),
interest.defaultWireEncodingFormat_);
}
/// <summary>
/// Decode input as an NDN-TLV LpPacket and set the fields of the lpPacket object.
/// </summary>
///
/// <param name="lpPacket">The LpPacket object whose fields are updated.</param>
/// <param name="input"></param>
/// <param name="copy">unchanged while the Blob values are used.</param>
/// <exception cref="EncodingException">For invalid encoding.</exception>
public override void decodeLpPacket(LpPacket lpPacket, ByteBuffer input, bool copy)
{
lpPacket.clear();
TlvDecoder decoder = new TlvDecoder(input);
int endOffset = decoder.readNestedTlvsStart(net.named_data.jndn.encoding.tlv.Tlv.LpPacket_LpPacket);
while (decoder.getOffset() < endOffset) {
// Imitate TlvDecoder.readTypeAndLength.
int fieldType = decoder.readVarNumber();
int fieldLength = decoder.readVarNumber();
int fieldEndOffset = decoder.getOffset() + fieldLength;
if (fieldEndOffset > input.limit())
throw new EncodingException(
"TLV length exceeds the buffer length");
if (fieldType == net.named_data.jndn.encoding.tlv.Tlv.LpPacket_Fragment) {
// Set the fragment to the bytes of the TLV value.
lpPacket.setFragmentWireEncoding(new Blob(decoder.getSlice(
decoder.getOffset(), fieldEndOffset), copy));
decoder.seek(fieldEndOffset);
// The fragment is supposed to be the last field.
break;
} else if (fieldType == net.named_data.jndn.encoding.tlv.Tlv.LpPacket_Nack) {
NetworkNack networkNack = new NetworkNack();
int code = (int) decoder.readOptionalNonNegativeIntegerTlv(
net.named_data.jndn.encoding.tlv.Tlv.LpPacket_NackReason, fieldEndOffset);
// The enum numeric values are the same as this wire format, so use as is.
if (code < 0
|| code == net.named_data.jndn.NetworkNack.Reason.NONE.getNumericType())
// This includes an omitted NackReason.
networkNack.setReason(net.named_data.jndn.NetworkNack.Reason.NONE);
else if (code == net.named_data.jndn.NetworkNack.Reason.CONGESTION.getNumericType())
networkNack.setReason(net.named_data.jndn.NetworkNack.Reason.CONGESTION);
else if (code == net.named_data.jndn.NetworkNack.Reason.DUPLICATE.getNumericType())
networkNack.setReason(net.named_data.jndn.NetworkNack.Reason.DUPLICATE);
else if (code == net.named_data.jndn.NetworkNack.Reason.NO_ROUTE.getNumericType())
networkNack.setReason(net.named_data.jndn.NetworkNack.Reason.NO_ROUTE);
else {
// Unrecognized reason.
networkNack.setReason(net.named_data.jndn.NetworkNack.Reason.OTHER_CODE);
networkNack.setOtherReasonCode(code);
}
lpPacket.addHeaderField(networkNack);
} else if (fieldType == net.named_data.jndn.encoding.tlv.Tlv.LpPacket_IncomingFaceId) {
IncomingFaceId incomingFaceId = new IncomingFaceId();
incomingFaceId.setFaceId(decoder
.readNonNegativeInteger(fieldLength));
lpPacket.addHeaderField(incomingFaceId);
} else {
// Unrecognized field type. The conditions for ignoring are here:
// http://redmine.named-data.net/projects/nfd/wiki/NDNLPv2
bool canIgnore = (fieldType >= net.named_data.jndn.encoding.tlv.Tlv.LpPacket_IGNORE_MIN
&& fieldType <= net.named_data.jndn.encoding.tlv.Tlv.LpPacket_IGNORE_MAX && (fieldType & 0x01) == 1);
if (!canIgnore)
throw new EncodingException(
"Did not get the expected TLV type");
// Ignore.
decoder.seek(fieldEndOffset);
}
decoder.finishNestedTlvs(fieldEndOffset);
}
decoder.finishNestedTlvs(endOffset);
}
public void onReceivedElement(ByteBuffer element)
{
LpPacket lpPacket = null;
if (element.get(0) == net.named_data.jndn.encoding.tlv.Tlv.LpPacket_LpPacket) {
// Decode the LpPacket and replace element with the fragment.
lpPacket = new LpPacket();
// Set copy false so that the fragment is a slice which will be copied below.
// The header fields are all integers and don't need to be copied.
net.named_data.jndn.encoding.TlvWireFormat.get().decodeLpPacket(lpPacket, element, false);
element = lpPacket.getFragmentWireEncoding().buf();
}
// First, decode as Interest or Data.
Interest interest = null;
Data data = null;
if (element.get(0) == net.named_data.jndn.encoding.tlv.Tlv.Interest || element.get(0) == net.named_data.jndn.encoding.tlv.Tlv.Data) {
TlvDecoder decoder = new TlvDecoder(element);
if (decoder.peekType(net.named_data.jndn.encoding.tlv.Tlv.Interest, element.remaining())) {
interest = new Interest();
interest.wireDecode(element, net.named_data.jndn.encoding.TlvWireFormat.get());
if (lpPacket != null)
interest.setLpPacket(lpPacket);
} else if (decoder.peekType(net.named_data.jndn.encoding.tlv.Tlv.Data, element.remaining())) {
data = new Data();
data.wireDecode(element, net.named_data.jndn.encoding.TlvWireFormat.get());
if (lpPacket != null)
data.setLpPacket(lpPacket);
}
}
if (lpPacket != null) {
// We have decoded the fragment, so remove the wire encoding to save memory.
lpPacket.setFragmentWireEncoding(new Blob());
NetworkNack networkNack = net.named_data.jndn.NetworkNack.getFirstHeader(lpPacket);
if (networkNack != null) {
if (interest == null)
// We got a Nack but not for an Interest, so drop the packet.
return;
ArrayList<PendingInterestTable.Entry> pitEntries = new ArrayList<PendingInterestTable.Entry>();
pendingInterestTable_.extractEntriesForNackInterest(interest,
pitEntries);
for (int i = 0; i < pitEntries.Count; ++i) {
PendingInterestTable.Entry pendingInterest = pitEntries[i];
try {
pendingInterest.getOnNetworkNack().onNetworkNack(
pendingInterest.getInterest(), networkNack);
} catch (Exception ex) {
logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE, "Error in onNack", ex);
}
}
// We have processed the network Nack packet.
return;
}
}
// Now process as Interest or Data.
if (interest != null) {
// Quickly lock and get all interest filter callbacks which match.
ArrayList matchedFilters = new ArrayList();
interestFilterTable_.getMatchedFilters(interest, matchedFilters);
// The lock on interestFilterTable_ is released, so call the callbacks.
for (int i_0 = 0; i_0 < matchedFilters.Count; ++i_0) {
InterestFilterTable.Entry entry = (InterestFilterTable.Entry) matchedFilters[i_0];
try {
entry.getOnInterest().onInterest(
entry.getFilter().getPrefix(), interest,
entry.getFace(), entry.getInterestFilterId(),
entry.getFilter());
} catch (Exception ex_1) {
logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE, "Error in onInterest", ex_1);
}
}
} else if (data != null) {
ArrayList<PendingInterestTable.Entry> pitEntries_2 = new ArrayList<PendingInterestTable.Entry>();
pendingInterestTable_.extractEntriesForExpressedInterest(data,
pitEntries_2);
for (int i_3 = 0; i_3 < pitEntries_2.Count; ++i_3) {
PendingInterestTable.Entry pendingInterest_4 = pitEntries_2[i_3];
try {
pendingInterest_4.getOnData().onData(
pendingInterest_4.getInterest(), data);
} catch (Exception ex_5) {
logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE, "Error in onData", ex_5);
}
}
}
}
/// <summary>
/// Decode input as an LpPacket and set the fields of the lpPacket object. Copy
/// from the input when making new Blob values. Your derived class should
/// override.
/// </summary>
///
/// <param name="lpPacket">The LpPacket object whose fields are updated.</param>
/// <param name="input"></param>
/// <exception cref="EncodingException">For invalid encoding.</exception>
/// <exception cref="System.NotSupportedException">for unimplemented if the derivedclass does not override.</exception>
public void decodeLpPacket(LpPacket lpPacket, ByteBuffer input)
{
decodeLpPacket(lpPacket, input, true);
}
/// <summary>
/// Decode input as an LpPacket and set the fields of the lpPacket object. Your
/// derived class should override.
/// </summary>
///
/// <param name="lpPacket">The LpPacket object whose fields are updated.</param>
/// <param name="input"></param>
/// <param name="copy">unchanged while the Blob values are used.</param>
/// <exception cref="EncodingException">For invalid encoding.</exception>
/// <exception cref="System.NotSupportedException">for unimplemented if the derivedclass does not override.</exception>
public virtual void decodeLpPacket(LpPacket lpPacket, ByteBuffer input, bool copy)
{
throw new NotSupportedException(
"decodeLpPacket is not implemented");
}
