ndn-cpp/data.hpp - ndnSIM/ndn-cxx - Gitiles

 /**
  * Copyright (C) 2013 Regents of the University of California.
  * @author: Jeff Thompson <jefft0@remap.ucla.edu>
  * See COPYING for copyright and distribution information.
  */

 #ifndef NDN_DATA_HPP
 #define NDN_DATA_HPP

 #include "common.hpp"
 #include "name.hpp"
 #include "key.hpp"
 #include "util/signed-blob.hpp"
 #include "c/data.h"

 namespace ndn {

 /**
  * A Signature is an abstract base class providing an methods to work with the signature information in a Data packet.
  */
 class Signature {
 public:
   /**
    * Return a pointer to a new Signature which is a copy of this signature.
    * This is pure virtual, the subclass must implement it.
    */
   virtual ptr_lib::shared_ptr<Signature>
   clone() const = 0;

   /**
    * The virtual destructor.
    */
   virtual
   ~Signature();

     /**
    * Set the signatureStruct to point to the values in this signature object, without copying any memory.
    * WARNING: The resulting pointers in signatureStruct are invalid after a further use of this object which could reallocate memory.
    * This is pure virtual, the subclass must implement it.
    * @param signatureStruct a C ndn_Signature struct where the name components array is already allocated.
    */
   virtual void
   get(struct ndn_Signature& signatureStruct) const = 0;

   /**
    * Clear this signature, and set the values by copying from the ndn_Signature struct.
    * This is pure virtual, the subclass must implement it.
    * @param signatureStruct a C ndn_Signature struct
    */
   virtual void
   set(const struct ndn_Signature& signatureStruct) = 0;
 };

 /**
  * An MetaInfo holds the meta info which is signed inside the data packet.
  */
 class MetaInfo {
 public:
   MetaInfo()
   {
     type_ = ndn_ContentType_DATA;
     freshnessSeconds_ = -1;
   }

   /**
    * Set the metaInfoStruct to point to the values in this meta info object, without copying any memory.
    * WARNING: The resulting pointers in metaInfoStruct are invalid after a further use of this object which could reallocate memory.
    * @param metaInfoStruct a C ndn_MetaInfo struct where the name components array is already allocated.
    */
   void
   get(struct ndn_MetaInfo& metaInfoStruct) const;

   /**
    * Clear this meta info, and set the values by copying from the ndn_MetaInfo struct.
    * @param metaInfoStruct a C ndn_MetaInfo struct
    */
   void
   set(const struct ndn_MetaInfo& metaInfoStruct);

   double
   getTimestampMilliseconds() const { return timestampMilliseconds_; }

   ndn_ContentType
   getType() const { return type_; }

   int
   getFreshnessSeconds() const { return freshnessSeconds_; }

   const Name::Component&
   getFinalBlockID() const { return finalBlockID_; }

   void
   setTimestampMilliseconds(double timestampMilliseconds) { timestampMilliseconds_ = timestampMilliseconds; }

   void
   setType(ndn_ContentType type) { type_ = type; }

   void
   setFreshnessSeconds(int freshnessSeconds) { freshnessSeconds_ = freshnessSeconds; }

   void
   setFinalBlockID(const std::vector<unsigned char>& finalBlockID) { finalBlockID_ = Name::Component(finalBlockID); }

   void
   setFinalBlockID(const unsigned char* finalBlockID, unsigned int finalBlockIdLength)
   {
     finalBlockID_ = Name::Component(finalBlockID, finalBlockIdLength);
   }

 private:
   double timestampMilliseconds_; /**< milliseconds since 1/1/1970. -1 for none */
   ndn_ContentType type_;         /**< default is ndn_ContentType_DATA. -1 for none */
   int freshnessSeconds_;         /**< -1 for none */
   Name::Component finalBlockID_; /** size 0 for none */
 };

 class Data {
 public:
   /**
    * Create a new Data object with default values and where the signature is a blank Sha256WithRsaSignature.
    */
   Data();

   /**
    * Create a new Data object with the given name and default values and where the signature is a blank Sha256WithRsaSignature.
    * @param name A reference to the name which is copied.
    */
   Data(const Name& name);

   /**
    * Encode this Data for a particular wire format. Also, set the wireEncoding field to the encoded result.
    * This is not const because it updates the wireEncoding.
    * @param wireFormat A WireFormat object used to encode the input. If omitted, use WireFormat getDefaultWireFormat().
    * @return The encoded byte array.
    */
   SignedBlob
   wireEncode(WireFormat& wireFormat = *WireFormat::getDefaultWireFormat());

   /**
    * Decode the input using a particular wire format and update this Data. Also, set the wireEncoding field to the input.
    * @param input The input byte array to be decoded.
    * @param inputLength The length of input.
    * @param wireFormat A WireFormat object used to decode the input. If omitted, use WireFormat getDefaultWireFormat().
    */
   void
   wireDecode(const unsigned char* input, unsigned int inputLength, WireFormat& wireFormat = *WireFormat::getDefaultWireFormat());

   /**
    * Decode the input using a particular wire format and update this Data. Also, set the wireEncoding field to the input.
    * @param input The input byte array to be decoded.
    * @param wireFormat A WireFormat object used to decode the input. If omitted, use WireFormat getDefaultWireFormat().
    */
   void
   wireDecode(const std::vector<unsigned char>& input, WireFormat& wireFormat = *WireFormat::getDefaultWireFormat())
   {
     wireDecode(&input[0], input.size(), wireFormat);
   }

   /**
    * Set the dataStruct to point to the values in this interest, without copying any memory.
    * WARNING: The resulting pointers in dataStruct are invalid after a further use of this object which could reallocate memory.
    * @param dataStruct a C ndn_Data struct where the name components array is already allocated.
    */
   void
   get(struct ndn_Data& dataStruct) const;

   /**
    * Clear this data object, and set the values by copying from the ndn_Data struct.
    * @param dataStruct a C ndn_Data struct
    */
   void
   set(const struct ndn_Data& dataStruct);

   const Signature*
   getSignature() const { return signature_.get(); }

   Signature*
   getSignature()
   {
     // TODO: Should add an OnChanged listener instead of always calling onChanged.
     onChanged();
     return signature_.get();
   }

   const Name&
   getName() const { return name_; }

   Name&
   getName()
   {
     // TODO: Should add an OnChanged listener instead of always calling onChanged.
     onChanged();
     return name_;
   }

   const MetaInfo&
   getMetaInfo() const { return metaInfo_; }

   MetaInfo&
   getMetaInfo()
   {
     // TODO: Should add an OnChanged listener instead of always calling onChanged.
     onChanged();
     return metaInfo_;
   }

   const Blob&
   getContent() const { return content_; }

   /**
    * Set the signature to a copy of the given signature.
    * @param signature The signature object which is cloned.
    */
   void
   setSignature(const Signature& signature)
   {
     signature_ = signature.clone();
     onChanged();
   }

   /**
    * Set name to a copy of the given Name.
    * @param name The Name which is copied.
    */
   void
   setName(const Name& name)
   {
     name_ = name;
     onChanged();
   }

   /**
    * Set metaInfo to a copy of the given MetaInfo.
    * @param metaInfo The MetaInfo which is copied.
    */
   void
   setMetainfo(const MetaInfo& metaInfo)
   {
     metaInfo_ = metaInfo;
     onChanged();
   }

   /**
    * Set the content to a copy of the data in the vector.
    * @param content A vector whose contents are copied.
    */
   void
   setContent(const std::vector<unsigned char>& content)
   {
     content_ = content;
     onChanged();
   }
   void
   setContent(const unsigned char* content, unsigned int contentLength)
   {
     content_ = Blob(content, contentLength);
     onChanged();
   }

   /**
    * Set content to point to an existing byte array.  IMPORTANT: After calling this,
    * if you keep a pointer to the array then you must treat the array as immutable and promise not to change it.
    * @param content A pointer to a vector with the byte array.  This takes another reference and does not copy the bytes.
    */
   void
   setContent(const ptr_lib::shared_ptr<std::vector<unsigned char> > &content)
   {
     content_ = content;
     onChanged();
   }

   void
   setContent(const ptr_lib::shared_ptr<const std::vector<unsigned char> > &content)
   {
     content_ = content;
     onChanged();
   }

 private:
   /**
    * Clear the wire encoding.
    */
   void
   onChanged();

   ptr_lib::shared_ptr<Signature> signature_;
   Name name_;
   MetaInfo metaInfo_;
   Blob content_;
   SignedBlob wireEncoding_;
 };

 }

 #endif
	/**
	* Copyright (C) 2013 Regents of the University of California.
	* @author: Jeff Thompson <jefft0@remap.ucla.edu>
	* See COPYING for copyright and distribution information.
	*/

	#ifndef NDN_DATA_HPP
	#define NDN_DATA_HPP

	#include "common.hpp"
	#include "name.hpp"
	#include "key.hpp"
	#include "util/signed-blob.hpp"
	#include "c/data.h"

	namespace ndn {

	/**
	* A Signature is an abstract base class providing an methods to work with the signature information in a Data packet.
	*/
	class Signature {
	public:
	/**
	* Return a pointer to a new Signature which is a copy of this signature.
	* This is pure virtual, the subclass must implement it.
	*/
	virtual ptr_lib::shared_ptr<Signature>
	clone() const = 0;

	/**
	* The virtual destructor.
	*/
	virtual
	~Signature();

	/**
	* Set the signatureStruct to point to the values in this signature object, without copying any memory.
	* WARNING: The resulting pointers in signatureStruct are invalid after a further use of this object which could reallocate memory.
	* This is pure virtual, the subclass must implement it.
	* @param signatureStruct a C ndn_Signature struct where the name components array is already allocated.
	*/
	virtual void
	get(struct ndn_Signature& signatureStruct) const = 0;

	/**
	* Clear this signature, and set the values by copying from the ndn_Signature struct.
	* This is pure virtual, the subclass must implement it.
	* @param signatureStruct a C ndn_Signature struct
	*/
	virtual void
	set(const struct ndn_Signature& signatureStruct) = 0;
	};

	/**
	* An MetaInfo holds the meta info which is signed inside the data packet.
	*/
	class MetaInfo {
	public:
	MetaInfo()
	{
	type_ = ndn_ContentType_DATA;
	freshnessSeconds_ = -1;
	}

	/**
	* Set the metaInfoStruct to point to the values in this meta info object, without copying any memory.
	* WARNING: The resulting pointers in metaInfoStruct are invalid after a further use of this object which could reallocate memory.
	* @param metaInfoStruct a C ndn_MetaInfo struct where the name components array is already allocated.
	*/
	void
	get(struct ndn_MetaInfo& metaInfoStruct) const;

	/**
	* Clear this meta info, and set the values by copying from the ndn_MetaInfo struct.
	* @param metaInfoStruct a C ndn_MetaInfo struct
	*/
	void
	set(const struct ndn_MetaInfo& metaInfoStruct);

	double
	getTimestampMilliseconds() const { return timestampMilliseconds_; }

	ndn_ContentType
	getType() const { return type_; }

	int
	getFreshnessSeconds() const { return freshnessSeconds_; }

	const Name::Component&
	getFinalBlockID() const { return finalBlockID_; }

	void
	setTimestampMilliseconds(double timestampMilliseconds) { timestampMilliseconds_ = timestampMilliseconds; }

	void
	setType(ndn_ContentType type) { type_ = type; }

	void
	setFreshnessSeconds(int freshnessSeconds) { freshnessSeconds_ = freshnessSeconds; }

	void
	setFinalBlockID(const std::vector<unsigned char>& finalBlockID) { finalBlockID_ = Name::Component(finalBlockID); }

	void
	setFinalBlockID(const unsigned char* finalBlockID, unsigned int finalBlockIdLength)
	{
	finalBlockID_ = Name::Component(finalBlockID, finalBlockIdLength);
	}

	private:
	double timestampMilliseconds_; /*< milliseconds since 1/1/1970. -1 for none /
	ndn_ContentType type_; /*< default is ndn_ContentType_DATA. -1 for none /
	int freshnessSeconds_; /*< -1 for none /
	Name::Component finalBlockID_; /** size 0 for none */
	};

	class Data {
	public:
	/**
	* Create a new Data object with default values and where the signature is a blank Sha256WithRsaSignature.
	*/
	Data();

	/**
	* Create a new Data object with the given name and default values and where the signature is a blank Sha256WithRsaSignature.
	* @param name A reference to the name which is copied.
	*/
	Data(const Name& name);

	/**
	* Encode this Data for a particular wire format. Also, set the wireEncoding field to the encoded result.
	* This is not const because it updates the wireEncoding.
	* @param wireFormat A WireFormat object used to encode the input. If omitted, use WireFormat getDefaultWireFormat().
	* @return The encoded byte array.
	*/
	SignedBlob
	wireEncode(WireFormat& wireFormat = *WireFormat::getDefaultWireFormat());

	/**
	* Decode the input using a particular wire format and update this Data. Also, set the wireEncoding field to the input.
	* @param input The input byte array to be decoded.
	* @param inputLength The length of input.
	* @param wireFormat A WireFormat object used to decode the input. If omitted, use WireFormat getDefaultWireFormat().
	*/
	void
	wireDecode(const unsigned char* input, unsigned int inputLength, WireFormat& wireFormat = *WireFormat::getDefaultWireFormat());

	/**
	* Decode the input using a particular wire format and update this Data. Also, set the wireEncoding field to the input.
	* @param input The input byte array to be decoded.
	* @param wireFormat A WireFormat object used to decode the input. If omitted, use WireFormat getDefaultWireFormat().
	*/
	void
	wireDecode(const std::vector<unsigned char>& input, WireFormat& wireFormat = *WireFormat::getDefaultWireFormat())
	{
	wireDecode(&input[0], input.size(), wireFormat);
	}

	/**
	* Set the dataStruct to point to the values in this interest, without copying any memory.
	* WARNING: The resulting pointers in dataStruct are invalid after a further use of this object which could reallocate memory.
	* @param dataStruct a C ndn_Data struct where the name components array is already allocated.
	*/
	void
	get(struct ndn_Data& dataStruct) const;

	/**
	* Clear this data object, and set the values by copying from the ndn_Data struct.
	* @param dataStruct a C ndn_Data struct
	*/
	void
	set(const struct ndn_Data& dataStruct);

	const Signature*
	getSignature() const { return signature_.get(); }

	Signature*
	getSignature()
	{
	// TODO: Should add an OnChanged listener instead of always calling onChanged.
	onChanged();
	return signature_.get();
	}

	const Name&
	getName() const { return name_; }

	Name&
	getName()
	{
	// TODO: Should add an OnChanged listener instead of always calling onChanged.
	onChanged();
	return name_;
	}

	const MetaInfo&
	getMetaInfo() const { return metaInfo_; }

	MetaInfo&
	getMetaInfo()
	{
	// TODO: Should add an OnChanged listener instead of always calling onChanged.
	onChanged();
	return metaInfo_;
	}

	const Blob&
	getContent() const { return content_; }

	/**
	* Set the signature to a copy of the given signature.
	* @param signature The signature object which is cloned.
	*/
	void
	setSignature(const Signature& signature)
	{
	signature_ = signature.clone();
	onChanged();
	}

	/**
	* Set name to a copy of the given Name.
	* @param name The Name which is copied.
	*/
	void
	setName(const Name& name)
	{
	name_ = name;
	onChanged();
	}

	/**
	* Set metaInfo to a copy of the given MetaInfo.
	* @param metaInfo The MetaInfo which is copied.
	*/
	void
	setMetainfo(const MetaInfo& metaInfo)
	{
	metaInfo_ = metaInfo;
	onChanged();
	}

	/**
	* Set the content to a copy of the data in the vector.
	* @param content A vector whose contents are copied.
	*/
	void
	setContent(const std::vector<unsigned char>& content)
	{
	content_ = content;
	onChanged();
	}
	void
	setContent(const unsigned char* content, unsigned int contentLength)
	{
	content_ = Blob(content, contentLength);
	onChanged();
	}

	/**
	* Set content to point to an existing byte array. IMPORTANT: After calling this,
	* if you keep a pointer to the array then you must treat the array as immutable and promise not to change it.
	* @param content A pointer to a vector with the byte array. This takes another reference and does not copy the bytes.
	*/
	void
	setContent(const ptr_lib::shared_ptr<std::vector<unsigned char> > &content)
	{
	content_ = content;
	onChanged();
	}

	void
	setContent(const ptr_lib::shared_ptr<const std::vector<unsigned char> > &content)
	{
	content_ = content;
	onChanged();
	}

	private:
	/**
	* Clear the wire encoding.
	*/
	void
	onChanged();

	ptr_lib::shared_ptr<Signature> signature_;
	Name name_;
	MetaInfo metaInfo_;
	Blob content_;
	SignedBlob wireEncoding_;
	};

	}

	#endif