58 lines
1.4 KiB
C++
58 lines
1.4 KiB
C++
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#ifndef ETHERNET_HEADER_HPP_
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#define ETHERNET_HEADER_HPP_
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#include <vanetza/common/byte_buffer.hpp>
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#include <vanetza/common/byte_order.hpp>
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#include <vanetza/net/mac_address.hpp>
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#include <cstddef>
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namespace vanetza
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{
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/**
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* Get length of ethernet header in bytes
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* \param header length in bytes
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*/
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constexpr std::size_t ethernet_header_length()
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{
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return 2 * sizeof(MacAddress::octets) + sizeof(uint16_t);
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}
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/**
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* Link-level header of type Ethernet II
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*
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* EthernetHeader is suitable for Linux raw packet sockets, see man 7 packet
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*/
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class EthernetHeader
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{
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public:
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using EtherType = uint16be_t;
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static constexpr std::size_t length_bytes = ethernet_header_length();
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MacAddress destination;
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MacAddress source;
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EtherType type;
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};
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/**
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* Create a byte buffer containing an ethernet header
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* \param dest Destination MAC address
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* \param src Source MAC address
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* \param proto EtherType number
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*/
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ByteBuffer create_ethernet_header(const MacAddress& dest, const MacAddress& src, uint16be_t proto);
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ByteBuffer create_ethernet_header(const EthernetHeader&);
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/**
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* Parse ethernet header from byte buffer
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* \param buffer byte buffer (throws exception if too short)
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* \return ethernet header
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*/
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EthernetHeader decode_ethernet_header(const ByteBuffer&);
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EthernetHeader decode_ethernet_header(ByteBuffer::const_iterator, ByteBuffer::const_iterator);
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} // namespace vanetza
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#endif // ETHERNET_HEADER_HPP_
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