pcap-helper.hpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#ifndef NFD_DAEMON_FACE_PCAP_HELPER_HPP
#define NFD_DAEMON_FACE_PCAP_HELPER_HPP

#include "core/common.hpp"

#ifndef HAVE_LIBPCAP
#error "Cannot include this file when libpcap is not available"
#endif

// forward declarations
struct pcap;
typedef pcap pcap_t;

namespace nfd {
namespace face {

class PcapHelper : noncopyable
{
public:
  class Error : public std::runtime_error
  {
  public:
    explicit
    Error(const std::string& what)
      : std::runtime_error(what)
    {
    }
  };

  explicit
  PcapHelper(const std::string& interfaceName);

  ~PcapHelper();

  void
  activate(int dlt);

  void
  close();

  int
  getFd() const;

  std::string
  getLastError() const;

  size_t
  getNDropped() const;

  void
  setPacketFilter(const char* filter) const;

  std::tuple<const uint8_t*, size_t, std::string>
  readNextPacket() const;

  operator pcap_t*() const
  {
    return m_pcap;
  }

private:
  pcap_t* m_pcap;
};

} // namespace face
} // namespace nfd

#endif // NFD_DAEMON_FACE_PCAP_HELPER_HPP