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