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#ifndef PACKETPP_SLL_LAYER
#define PACKETPP_SLL_LAYER
#include "MacAddress.h"
#include "Layer.h"
/// @file
/**
* \namespace pcpp
* \brief The main namespace for the PcapPlusPlus lib
*/
namespace pcpp
{
/**
* @struct sll_header
* Represents SLL header
*/
#pragma pack(push, 1)
struct sll_header
{
/** Specifies whether packet was: specifically sent to us by somebody else (value=0);
* broadcast by somebody else (value=1); multicast, but not broadcast, by somebody else (value=2);
* sent to somebody else by somebody else (value=3); sent by us (value=4)
**/
uint16_t packet_type;
/** Contains a Linux ARPHRD_ value for the link-layer device type */
uint16_t ARPHRD_type;
/** Contains the length of the link-layer address of the sender of the packet. That length could be zero */
uint16_t link_layer_addr_len;
/** contains the link-layer address of the sender of the packet; the number of bytes of that field that are
* meaningful is specified by the link-layer address length field
**/
uint8_t link_layer_addr[8];
/** Contains an Ethernet protocol type of the next layer */
uint16_t protocol_type;
};
#pragma pack(pop)
/**
* @class SllLayer
* Represents an SLL (Linux cooked capture) protocol layer
*/
class SllLayer : public Layer
{
public:
/**
* A constructor that creates the layer from an existing packet raw data
* @param[in] data A pointer to the raw data (will be casted to ether_header)
* @param[in] dataLen Size of the data in bytes
* @param[in] packet A pointer to the Packet instance where layer will be stored in
*/
SllLayer(uint8_t* data, size_t dataLen, Packet* packet) : Layer(data, dataLen, nullptr, packet) { m_Protocol = SLL; }
/**
* A constructor that creates a new SLL header and allocates the data
* @param[in] packetType The packet type
* @param[in] ARPHRDType The ARPHRD type
*/
SllLayer(uint16_t packetType, uint16_t ARPHRDType);
~SllLayer() {}
/**
* Get a pointer to the Sll header. Notice this points directly to the data, so every change will change the actual packet data
* @return A pointer to the sll_header
*/
sll_header* getSllHeader() const { return (sll_header*)m_Data; }
/**
* A setter for the link layer address field
* @param[in] addr The address to set. Memory will be copied to packet
* @param[in] addrLength Address length, must be lower or equal to 8 (which is max length for SLL address)
* @return True if address was set successfully, or false of addrLength is out of bounds (0 or larger than 8)
*/
bool setLinkLayerAddr(uint8_t* addr, size_t addrLength);
/**
* Set a MAC address in the link layer address field
* @param[in] macAddr MAC address to set
* @return True if address was set successfully, false if MAC address isn't valid or if set failed
*/
bool setMacAddressAsLinkLayer(const MacAddress& macAddr);
/**
* Currently identifies the following next layers: IPv4Layer, IPv6Layer, ArpLayer, VlanLayer, PPPoESessionLayer, PPPoEDiscoveryLayer,
* MplsLayer.
* Otherwise sets PayloadLayer
*/
void parseNextLayer();
/**
* @return Size of sll_header
*/
size_t getHeaderLen() const { return sizeof(sll_header); }
/**
* Calculate the next protocol type for known protocols: IPv4, IPv6, ARP, VLAN
*/
void computeCalculateFields();
std::string toString() const;
OsiModelLayer getOsiModelLayer() const { return OsiModelDataLinkLayer; }
};
} // namespace pcpp
#endif /* PACKETPP_SLL_LAYER */