packet_variant.hpp

#ifndef PACKET_VARIANT_HPP_LILZ0UWN
#define PACKET_VARIANT_HPP_LILZ0UWN
 
#include <vanetza/common/byte_view.hpp>
#include <vanetza/common/serialization.hpp>
#include <vanetza/net/chunk_packet.hpp>
#include <vanetza/net/cohesive_packet.hpp>
#include <boost/variant.hpp>
 
namespace vanetza
{
 
using PacketVariant = boost::variant<ChunkPacket, CohesivePacket>;
 
inline std::size_t
size(const CohesivePacket& packet, OsiLayer from, OsiLayer to)
{
    return packet.size(from, to);
}
 
inline std::size_t
size(const CohesivePacket& packet, OsiLayer layer)
{
    return packet.size(layer);
}
 
inline std::size_t
size(const ChunkPacket& packet, OsiLayer from, OsiLayer to)
{
    return packet.size(from, to);
}
 
inline std::size_t
size(const ChunkPacket& packet, OsiLayer layer)
{
    return packet[layer].size();
}
 
/**
 * Create a view of a packet's bytes assigned to a certain layer
 * \param packet
 * \param layer
 * \return a byte view, possibly empty
 */
byte_view_range create_byte_view(const ChunkPacket&, OsiLayer);
byte_view_range create_byte_view(const CohesivePacket&, OsiLayer);
 
/**
 * Create a byte view for a sub-range of layers
 * \param packet
 * \param from first byte will be from this layer
 * \param to last byte will be from this layer
 * \return a byte view
 */
byte_view_range create_byte_view(const ChunkPacket& packet, OsiLayer from, OsiLayer to);
byte_view_range create_byte_view(const CohesivePacket& packet, OsiLayer from, OsiLayer to);
 
/**
 * Serialize a whole packet from physical to application layer
 * \param archive destination archive
 * \param packet source packet
 */
void serialize(OutputArchive&, const ChunkPacket&);
void serialize(OutputArchive&, const CohesivePacket&);
 
} // namespace vanetza
 
namespace boost
{
 
// PacketVariant is only a type alias, so we need this quirk for proper name lookup
std::size_t size(const vanetza::PacketVariant&, vanetza::OsiLayer from, vanetza::OsiLayer to);
std::size_t size(const vanetza::PacketVariant&, vanetza::OsiLayer);
std::size_t size(const vanetza::PacketVariant&);
vanetza::byte_view_range create_byte_view(const vanetza::PacketVariant&, vanetza::OsiLayer);
vanetza::byte_view_range create_byte_view(const vanetza::PacketVariant&, vanetza::OsiLayer from, vanetza::OsiLayer to);
void serialize(vanetza::OutputArchive&, const vanetza::PacketVariant&);
 
} // namespace boost
 
#endif /* PACKET_VARIANT_HPP_LILZ0UWN */