LLCLayer.h

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#pragma once
 
#include "Layer.h"
 
 
namespace pcpp
{
#pragma pack(push, 1)
    struct llc_header
    {
        uint8_t dsap,
            ssap,
            control;
    };
#pragma pack(pop)
    static_assert(sizeof(llc_header) == 3, "llc_header size is not 3 bytes");
 
    class LLCLayer : public Layer
    {
    public:
        LLCLayer(uint8_t* data, size_t dataLen, Layer* prevLayer, Packet* packet)
            : Layer(data, dataLen, prevLayer, packet, LLC)
        {}
 
        LLCLayer(uint8_t dsap, uint8_t ssap, uint8_t control);
 
        inline llc_header* getLlcHeader() const
        {
            return reinterpret_cast<llc_header*>(m_Data);
        };
 
        // overridden methods
 
        void parseNextLayer() override;
 
        void computeCalculateFields() override
        {}
 
        size_t getHeaderLen() const override
        {
            return sizeof(llc_header);
        }
 
        std::string toString() const override;
 
        OsiModelLayer getOsiModelLayer() const override
        {
            return OsiModelDataLinkLayer;
        }
 
        static bool isDataValid(const uint8_t* data, size_t dataLen);
 
        struct SerializedFields : Layer::SerializedFields
        {
            static std::vector<FieldDescriptor> all()
            {
                auto result = Layer::SerializedFields::all();
                std::initializer_list<FieldDescriptor> extra{ DSAP, SSAP, Control };
                std::copy(extra.begin(), extra.end(), std::back_inserter(result));
                return result;
            }
 
            static const FieldDescriptor DSAP;
 
            static const FieldDescriptor SSAP;
 
            static const FieldDescriptor Control;
        };
 
    protected:
        void serializeLayer(ObjectScope& serializer) const override;
    };
 
}  // namespace pcpp