PcapFileDevice.h

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#ifndef PCAPPP_FILE_DEVICE
#define PCAPPP_FILE_DEVICE

#include "PcapDevice.h"
#include "RawPacket.h"
#include <fstream>

// forward declaration for structs and typedefs defined in pcap.h
struct pcap_dumper;
typedef struct pcap_dumper pcap_dumper_t;


namespace pcpp
{

    class IFileDevice : public IPcapDevice
    {
    protected:
        std::string m_FileName;

        IFileDevice(const std::string& fileName);
        virtual ~IFileDevice();

    public:

        std::string getFileName() const;


        //override methods

        virtual void close();
    };


    class IFileReaderDevice : public IFileDevice
    {
    protected:
        uint32_t m_NumOfPacketsRead;
        uint32_t m_NumOfPacketsNotParsed;

        IFileReaderDevice(const std::string& fileName);

    public:

        virtual ~IFileReaderDevice() {}

        uint64_t getFileSize() const;

        virtual bool getNextPacket(RawPacket& rawPacket) = 0;

        int getNextPackets(RawPacketVector& packetVec, int numOfPacketsToRead = -1);

        static IFileReaderDevice* getReader(const std::string& fileName);
    };


    class PcapFileReaderDevice : public IFileReaderDevice
    {
    private:
        LinkLayerType m_PcapLinkLayerType;

        // private copy c'tor
        PcapFileReaderDevice(const PcapFileReaderDevice& other);
        PcapFileReaderDevice& operator=(const PcapFileReaderDevice& other);

    public:
        PcapFileReaderDevice(const std::string& fileName) : IFileReaderDevice(fileName), m_PcapLinkLayerType(LINKTYPE_ETHERNET) {}

        virtual ~PcapFileReaderDevice() {}

        LinkLayerType getLinkLayerType() const { return m_PcapLinkLayerType; }


        //overridden methods

        bool getNextPacket(RawPacket& rawPacket);

        bool open();

        void getStatistics(PcapStats& stats) const;
    };

    class SnoopFileReaderDevice : public IFileReaderDevice
    {
    private:
        #pragma pack(0)
        /*
         * File format header.
         */
        typedef struct {
            uint64_t        identification_pattern;
            uint32_t        version_number;
            uint32_t        datalink_type;
        } snoop_file_header_t;

        /*
         * Packet record header.
         */
        typedef struct {
            uint32_t        original_length;     /* original packet length */
            uint32_t        included_length;     /* saved packet length */
            uint32_t        packet_record_length;/* total record length */
            uint32_t        ndrops_cumulative;   /* cumulative drops */
            uint32_t        time_sec;            /* timestamp */
            uint32_t        time_usec;           /* microsecond timestamp */
        } snoop_packet_header_t;
        #pragma pack()

        LinkLayerType m_PcapLinkLayerType;
        std::ifstream m_snoopFile;

        // private copy c'tor
        SnoopFileReaderDevice(const PcapFileReaderDevice& other);
        SnoopFileReaderDevice& operator=(const PcapFileReaderDevice& other);

    public:
        SnoopFileReaderDevice(const std::string& fileName) : IFileReaderDevice(fileName), m_PcapLinkLayerType(LINKTYPE_ETHERNET) {}

        virtual ~SnoopFileReaderDevice();

        LinkLayerType getLinkLayerType() const { return m_PcapLinkLayerType; }


        //overridden methods

        bool getNextPacket(RawPacket& rawPacket);

        bool open();

        void getStatistics(PcapStats& stats) const;

        void close();
    };


    class PcapNgFileReaderDevice : public IFileReaderDevice
    {
    private:
        void* m_LightPcapNg;
        BpfFilterWrapper m_BpfWrapper;

        // private copy c'tor
        PcapNgFileReaderDevice(const PcapNgFileReaderDevice& other);
        PcapNgFileReaderDevice& operator=(const PcapNgFileReaderDevice& other);

    public:
        PcapNgFileReaderDevice(const std::string& fileName);

        virtual ~PcapNgFileReaderDevice() { close(); }

        std::string getOS() const;

        std::string getHardware() const;

        std::string getCaptureApplication() const;

        std::string getCaptureFileComment() const;

        bool getNextPacket(RawPacket& rawPacket, std::string& packetComment);

        //overridden methods

        bool getNextPacket(RawPacket& rawPacket);

        bool open();

        void getStatistics(PcapStats& stats) const;

        bool setFilter(std::string filterAsString);

        void close();
    };


    class IFileWriterDevice : public IFileDevice
    {
    protected:
        uint32_t m_NumOfPacketsWritten;
        uint32_t m_NumOfPacketsNotWritten;

        IFileWriterDevice(const std::string& fileName);

    public:

        virtual ~IFileWriterDevice() {}

        virtual bool writePacket(RawPacket const& packet) = 0;

        virtual bool writePackets(const RawPacketVector& packets) = 0;

        using IFileDevice::open;
        virtual bool open(bool appendMode) = 0;
    };


    class PcapFileWriterDevice : public IFileWriterDevice
    {
    private:
        pcap_dumper_t* m_PcapDumpHandler;
        LinkLayerType m_PcapLinkLayerType;
        bool m_AppendMode;
        FILE* m_File;

        // private copy c'tor
        PcapFileWriterDevice(const PcapFileWriterDevice& other);
        PcapFileWriterDevice& operator=(const PcapFileWriterDevice& other);

        void closeFile();

    public:
        PcapFileWriterDevice(const std::string& fileName, LinkLayerType linkLayerType = LINKTYPE_ETHERNET);

        ~PcapFileWriterDevice() {}

        bool writePacket(RawPacket const& packet);

        bool writePackets(const RawPacketVector& packets);

        //override methods

        virtual bool open();

        bool open(bool appendMode);

        virtual void close();

        void flush();

        virtual void getStatistics(PcapStats& stats) const;
    };


    class PcapNgFileWriterDevice : public IFileWriterDevice
    {
    private:
        void* m_LightPcapNg;
        int m_CompressionLevel;
        BpfFilterWrapper m_BpfWrapper;

        // private copy c'tor
        PcapNgFileWriterDevice(const PcapFileWriterDevice& other);
        PcapNgFileWriterDevice& operator=(const PcapNgFileWriterDevice& other);

    public:

        PcapNgFileWriterDevice(const std::string& fileName, int compressionLevel = 0);

        virtual ~PcapNgFileWriterDevice() { close(); }

        bool open(const std::string& os, const std::string& hardware, const std::string& captureApp, const std::string& fileComment);

        bool writePacket(RawPacket const& packet, const std::string& comment);

        //overridden methods

        bool writePacket(RawPacket const& packet);

        bool writePackets(const RawPacketVector& packets);

        bool open();

        bool open(bool appendMode);

        void flush();

        void close();

        void getStatistics(PcapStats& stats) const;

        bool setFilter(std::string filterAsString);

    };

}// namespace pcpp

#endif