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