PayloadLayer.h

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#pragma once
 
#include "Layer.h"
 
 
namespace pcpp
{
    class PayloadLayer : public Layer
    {
    public:
        PayloadLayer(uint8_t* data, size_t dataLen, Layer* prevLayer, Packet* packet)
            : Layer(data, dataLen, prevLayer, packet, GenericPayload)
        {}
 
        PayloadLayer(const uint8_t* data, size_t dataLen);
 
        explicit PayloadLayer(const std::string& payloadAsHexStream);
 
        ~PayloadLayer() override = default;
 
        uint8_t* getPayload() const
        {
            return m_Data;
        }
 
        size_t getPayloadLen() const
        {
            return m_DataLen;
        }
 
        // implement abstract methods
 
        void parseNextLayer() override
        {}
 
        size_t getHeaderLen() const override
        {
            return m_DataLen;
        }
 
        void computeCalculateFields() override
        {}
 
        void setPayload(const uint8_t* newPayload, size_t newPayloadLength);
 
        std::string toString() const override;
 
        OsiModelLayer getOsiModelLayer() const override
        {
            return OsiModelApplicationLayer;
        }
 
        static bool isDataValid(const uint8_t* data, size_t dataLen)
        {
            // PayloadLayer is special as it can be empty. So, it's valid if data is nullptr and dataLen is 0.
            return (data == nullptr) != (dataLen != 0);  // XOR
        };
    };
}  // namespace pcpp