blob: cb0e559210c1281775ffc55a9c4d5ac63c6314c4 [file] [log] [blame]
/**
* @author: Jeff Thompson
* 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 "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);
Blob wireEncode(WireFormat& wireFormat = *WireFormat::getDefaultWireFormat()) const
{
return wireFormat.encodeData(*this);
}
void wireDecode(const unsigned char *input, unsigned int inputLength, WireFormat& wireFormat = *WireFormat::getDefaultWireFormat())
{
wireFormat.decodeData(*this, input, inputLength);
}
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() { return signature_.get(); }
const Name& getName() const { return name_; }
Name& getName() { return name_; }
const MetaInfo& getMetaInfo() const { return metaInfo_; }
MetaInfo& getMetaInfo() { 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(); }
void setName(const Name& name) { name_ = name; }
void setMetainfo(const MetaInfo& metaInfo) { metaInfo_ = metaInfo; }
/**
* 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; }
void setContent(const unsigned char *content, unsigned int contentLength)
{
content_ = Blob(content, contentLength);
}
/**
* 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; }
void setContent(const ptr_lib::shared_ptr<const std::vector<unsigned char> > &content) { content_ = content; }
private:
ptr_lib::shared_ptr<Signature> signature_;
Name name_;
MetaInfo metaInfo_;
Blob content_;
};
}
#endif