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// Copyright (C) 2010-2015 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
// BEGIN_HEADER_GUARD
#include <string>
#include <dns/rdata.h>
#include <boost/shared_ptr.hpp>
#include <vector>
// BEGIN_ISC_NAMESPACE
// BEGIN_COMMON_DECLARATIONS
// END_COMMON_DECLARATIONS
// BEGIN_RDATA_NAMESPACE
struct OPTImpl;
class OPT : public Rdata {
public:
// BEGIN_COMMON_MEMBERS
// END_COMMON_MEMBERS
// The default constructor makes sense for OPT as it can be empty.
OPT();
OPT& operator=(const OPT& source);
~OPT();
/// \brief A class representing a pseudo RR (or option) within an
/// OPT RR (see RFC 6891).
class PseudoRR {
public:
/// \brief Constructor.
/// \param code The OPTION-CODE field of the pseudo RR.
/// \param data The OPTION-DATA field of the pseudo
/// RR. OPTION-LENGTH is set to the length of this vector.
PseudoRR(uint16_t code,
boost::shared_ptr<std::vector<uint8_t> >& data);
/// \brief Return the option code of this pseudo RR.
uint16_t getCode() const;
/// \brief Return the option data of this pseudo RR.
const uint8_t* getData() const;
/// \brief Return the length of the option data of this
/// pseudo RR.
uint16_t getLength() const;
private:
uint16_t code_;
boost::shared_ptr<std::vector<uint8_t> > data_;
};
/// \brief Append a pseudo RR (option) in this OPT RR.
///
/// \param code The OPTION-CODE field of the pseudo RR.
/// \param data The OPTION-DATA field of the pseudo RR.
/// \param length The size of the \c data argument. OPTION-LENGTH is
/// set to this size.
/// \throw isc::InvalidParameter if this pseudo RR would cause
/// the OPT RDATA to overflow its RDLENGTH.
void appendPseudoRR(uint16_t code, const uint8_t* data, uint16_t length);
/// \brief Return a vector of the pseudo RRs (options) in this
/// OPT RR.
///
/// Note: The returned reference is only valid during the lifetime
/// of this \c generic::OPT object. It should not be used
/// afterwards.
const std::vector<PseudoRR>& getPseudoRRs() const;
private:
OPTImpl* impl_;
};
// END_RDATA_NAMESPACE
// END_ISC_NAMESPACE
// END_HEADER_GUARD
// Local Variables:
// mode: c++
// End:
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