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/*
Copyright (c) 2015-2015 Cisco Systems, Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#ifndef _ETHERNET_HEADER_H_
#define _ETHERNET_HEADER_H_
#include "PacketHeaderBase.h"
#include "MacAddress.h"
/**
* This class encapsulates an ethernet header.
* It has fields that are equivalent to the ethernet header fields.
* The data is saved in network byte order, and therefore the class can be used to create a packet in a buffer
* and send it over the network.
*/
class EthernetHeader
{
public:
struct Protocol
{
enum Type
{
IP = 0x0800,
VLAN = 0x8100,
ARP = 0x0806,
IPv6 = 0x86DD,
MPLS_Unicast = 0x8847,
MPLS_Multicast = 0x8848,
PPP = 0x880b,
PPPoED = 0x8863,
PPPoES = 0x8864
};
};
////////////////////////////////////////////////////////////////////////////////////////
// Common Header Interface
////////////////////////////////////////////////////////////////////////////////////////
public:
//Empty constructor
EthernetHeader() :
myProtocol(0)
{}
//Construct an EthernetHeader object from a given buffer, ordered in Network byte order
inline EthernetHeader(uint8_t* packet);
inline uint8_t* getPointer (){return (uint8_t*)this;}
static inline uint32_t getSize (){return (uint32_t)sizeof(EthernetHeader);}
// Get dest MAC pointer
MacAddress *getDestMacP() { return &myDestination; }
// Get source MAC pointer
MacAddress *getSrcMacP() { return &mySource; }
//Returns the next protocol, in host byte order
inline uint16_t getNextProtocol ();
//Set the next protocol value. The argument is receieved in host byte order.
inline void setNextProtocol (uint16_t);
// Retrieve VLAN fields for tag and protocol information
inline uint16_t getVlanTag ();
inline uint16_t getVlanProtocol ();
void dump (FILE* fd);
public:
MacAddress myDestination;
MacAddress mySource;
private:
uint16_t myProtocol;
uint16_t myVlanTag;
uint16_t myVlanProtocol;
};
#include "EthernetHeader.inl"
#endif //_ETHERNET_HEADER_H_
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