validation-policy-command-interest.hpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2013-2021 Regents of the University of California.
 *
 * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
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 * ndn-cxx library is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free Software
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 * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
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 * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
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#ifndef NDN_CXX_SECURITY_VALIDATION_POLICY_COMMAND_INTEREST_HPP
#define NDN_CXX_SECURITY_VALIDATION_POLICY_COMMAND_INTEREST_HPP
 
#include "ndn-cxx/security/validation-policy.hpp"
 
#include <boost/multi_index_container.hpp>
#include <boost/multi_index/ordered_index.hpp>
#include <boost/multi_index/sequenced_index.hpp>
#include <boost/multi_index/key_extractors.hpp>
 
namespace ndn {
namespace security {
inline namespace v2 {
 
class ValidationPolicyCommandInterest : public ValidationPolicy
{
public:
  class Options
  {
  public:
    Options()
    {
    }
 
  public:
    time::nanoseconds gracePeriod = 2_min;
 
    ssize_t maxRecords = 1000;
 
    time::nanoseconds recordLifetime = 1_h;
  };
 
  explicit
  ValidationPolicyCommandInterest(unique_ptr<ValidationPolicy> inner,
                                  const Options& options = {});
 
protected:
  void
  checkPolicy(const Data& data, const shared_ptr<ValidationState>& state,
              const ValidationContinuation& continueValidation) override;
 
  void
  checkPolicy(const Interest& interest, const shared_ptr<ValidationState>& state,
              const ValidationContinuation& continueValidation) override;
 
private:
  void
  cleanup();
 
  std::tuple<bool, Name, time::system_clock::TimePoint>
  parseCommandInterest(const Interest& interest, const shared_ptr<ValidationState>& state) const;
 
  bool
  checkTimestamp(const shared_ptr<ValidationState>& state,
                 const Name& keyName, time::system_clock::TimePoint timestamp);
 
  void
  insertNewRecord(const Name& keyName, time::system_clock::TimePoint timestamp);
 
private:
  Options m_options;
 
  struct LastTimestampRecord
  {
    Name keyName;
    time::system_clock::TimePoint timestamp;
    time::steady_clock::TimePoint lastRefreshed;
  };
 
  using Container = boost::multi_index_container<
    LastTimestampRecord,
    boost::multi_index::indexed_by<
      boost::multi_index::ordered_unique<
        boost::multi_index::member<LastTimestampRecord, Name, &LastTimestampRecord::keyName>
      >,
      boost::multi_index::sequenced<>
    >
  >;
  using Index = Container::nth_index<0>::type;
  using Queue = Container::nth_index<1>::type;
 
  Container m_container;
  Index& m_index;
  Queue& m_queue;
};
 
} // inline namespace v2
} // namespace security
} // namespace ndn
 
#endif // NDN_CXX_SECURITY_VALIDATION_POLICY_COMMAND_INTEREST_HPP