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#ifndef PACKETPP_VXLAN_LAYER
#define PACKETPP_VXLAN_LAYER
#include "Layer.h"
/// @file
namespace pcpp
{
/**
* @struct vxlan_header
* Represents a VXLAN protocol header
*/
#pragma pack(push, 1)
struct vxlan_header
{
#if(BYTE_ORDER == LITTLE_ENDIAN)
/** Reserved bits */
uint16_t reserved6_8:3;
/** VNI present flag */
uint16_t vniPresentFlag:1;
/** Reserved bits */
uint16_t reserved2_4:3;
/** GBP flag */
uint16_t gbpFlag:1;
/** Reserved bits */
uint16_t reserved14_16:3;
/** Policy applied flag */
uint16_t policyAppliedFlag:1;
/** Reserved bits */
uint16_t reserved11_12:2;
/** Don't learn flag */
uint16_t dontLearnFlag:1;
/** Reserved bits */
uint16_t reserved9:1;
#else
/** Reserved bits */
uint16_t reserved9:1;
/** Don't learn flag */
uint16_t dontLearnFlag:1;
/** Reserved bits */
uint16_t reserved11_12:2;
/** Policy applied flag */
uint16_t policyAppliedFlag:1;
/** Reserved bits */
uint16_t reserved14_16:3;
/** GBP flag */
uint16_t gbpFlag:1;
/** Reserved bits */
uint16_t reserved2_4:3;
/** VNI present flag */
uint16_t vniPresentFlag:1;
/** Reserved bits */
uint16_t reserved6_8:3;
#endif
/** Group Policy ID */
uint16_t groupPolicyID;
/** VXLAN Network ID (VNI) */
uint32_t vni:24;
/** Reserved bits */
uint32_t pad:8;
};
#pragma pack(pop)
/**
* @class VxlanLayer
* Represents a VXLAN (Virtual eXtensible Local Area Network) protocol layer
*/
class VxlanLayer : public Layer
{
public:
/** A constructor that creates the layer from an existing packet raw data
* @param[in] data A pointer to the raw data
* @param[in] dataLen Size of the data in bytes
* @param[in] prevLayer A pointer to the previous layer
* @param[in] packet A pointer to the Packet instance where layer will be stored in
*/
VxlanLayer(uint8_t* data, size_t dataLen, Layer* prevLayer, Packet* packet) : Layer(data, dataLen, prevLayer, packet) { m_Protocol = VXLAN; }
/**
* A constructor that creates a new VXLAN header and allocates the data. Note: the VNI present flag is set automatically
* @param[in] vni VNI (VXLAN Network ID) to set. Optional parameter (default is 0)
* @param[in] groupPolicyID Group Policy ID to set. Optional parameter (default is 0)
* @param[in] setGbpFlag Set GBP flag. Optional parameter (default is false)
* @param[in] setPolicyAppliedFlag Set Policy Applied flag. Optional parameter (default is false)
* @param[in] setDontLearnFlag Set Don't Learn flag. Optional parameter (default is false)
*/
explicit VxlanLayer(uint32_t vni = 0, uint16_t groupPolicyID = 0, bool setGbpFlag = false, bool setPolicyAppliedFlag = false, bool setDontLearnFlag = false);
~VxlanLayer() {}
/**
* Get a pointer to the VXLAN header. Notice this points directly to the data, so every change will change the actual packet data
* @return A pointer to the vxlan_header
*/
vxlan_header* getVxlanHeader() const { return (vxlan_header*)m_Data; }
/**
* @return The VXLAN Network ID (VNI) value
*/
uint32_t getVNI() const;
/**
* Set VXLAN Network ID (VNI) value
* @param[in] vni VNI value to set
*/
void setVNI(uint32_t vni);
/**
* A static method that checks whether the port is considered as VxLAN
* @param[in] port The port number to be checked
*/
static bool isVxlanPort(uint16_t port) { return port == 4789; }
// implement abstract methods
/**
* Next layer for VXLAN is always Ethernet
*/
void parseNextLayer();
/**
* @return Size of vxlan_header
*/
size_t getHeaderLen() const { return sizeof(vxlan_header); }
/**
* Does nothing for this layer
*/
void computeCalculateFields() {}
std::string toString() const;
OsiModelLayer getOsiModelLayer() const { return OsiModelDataLinkLayer; }
};
}
#endif // PACKETPP_VXLAN_LAYER