Packet.h

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#ifndef PACKETPP_PACKET
#define PACKETPP_PACKET

#include "RawPacket.h"
#include "Layer.h"
#include <vector>


namespace pcpp
{

    class Packet {
        friend class Layer;
    private:
        RawPacket* m_RawPacket;
        Layer* m_FirstLayer;
        Layer* m_LastLayer;
        uint64_t m_ProtocolTypes;
        size_t m_MaxPacketLen;
        bool m_FreeRawPacket;

    public:

        Packet(size_t maxPacketLen = 1);

        Packet(RawPacket* rawPacket, bool freeRawPacket = false, ProtocolType parseUntil = UnknownProtocol, OsiModelLayer parseUntilLayer = OsiModelLayerUnknown);

        Packet(RawPacket* rawPacket, ProtocolType parseUntil);

        Packet(RawPacket* rawPacket, OsiModelLayer parseUntilLayer);

        virtual ~Packet();

        Packet(const Packet& other);

        Packet& operator=(const Packet& other);

        inline RawPacket* getRawPacket() { return m_RawPacket; }

        void setRawPacket(RawPacket* rawPacket, bool freeRawPacket, ProtocolType parseUntil = UnknownProtocol, OsiModelLayer parseUntilLayer = OsiModelLayerUnknown);

        inline RawPacket* getRawPacketReadOnly() const { return m_RawPacket; }

        inline Layer* getFirstLayer() { return m_FirstLayer; }

        inline Layer* getLastLayer() { return m_LastLayer; }

        bool addLayer(Layer* newLayer);

        bool insertLayer(Layer* prevLayer, Layer* newLayer);

        bool removeLayer(Layer* layer);

        template<class TLayer>
        TLayer* getLayerOfType();

        template<class TLayer>
        TLayer* getNextLayerOfType(Layer* after);

        inline bool isPacketOfType(ProtocolType protocolType) { return m_ProtocolTypes & protocolType; }

        void computeCalculateFields();

        std::string toString(bool timeAsLocalTime = true);

        void toStringList(std::vector<std::string>& result, bool timeAsLocalTime = true);

    private:
        void copyDataFrom(const Packet& other);

        void destructPacketData();

        bool extendLayer(Layer* layer, int offsetInLayer, size_t numOfBytesToExtend);
        bool shortenLayer(Layer* layer, int offsetInLayer, size_t numOfBytesToShorten);

        void reallocateRawData(size_t newSize);

        std::string printPacketInfo(bool timeAsLocalTime);
    };

    template<class TLayer>
    TLayer* Packet::getLayerOfType()
    {
        if (dynamic_cast<TLayer*>(m_FirstLayer) != NULL)
            return (TLayer*)m_FirstLayer;

        return getNextLayerOfType<TLayer>(m_FirstLayer);
    }

    template<class TLayer>
    TLayer* Packet::getNextLayerOfType(Layer* after)
    {
        if (after == NULL)
            return NULL;

        Layer* curLayer = after->getNextLayer();
        while ((curLayer != NULL) && (dynamic_cast<TLayer*>(curLayer) == NULL))
        {
            curLayer = curLayer->getNextLayer();
        }

        return (TLayer*)curLayer;
    }

} // namespace pcpp

#endif /* PACKETPP_PACKET */