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107 lines
3.0 KiB
C++
107 lines
3.0 KiB
C++
//=======================================================================
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// Copyright Baptiste Wicht 2013-2018.
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// Distributed under the terms of the MIT License.
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// (See accompanying file LICENSE or copy at
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// http://www.opensource.org/licenses/MIT)
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//=======================================================================
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#ifndef NET_ETHERNET_LAYER_H
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#define NET_ETHERNET_LAYER_H
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#include <types.hpp>
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#include <expected.hpp>
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#include "tlib/net_constants.hpp"
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#include "net/interface.hpp"
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#include "net/packet.hpp"
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namespace network {
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namespace arp {
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struct layer;
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}
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namespace ip {
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struct layer;
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}
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namespace ethernet {
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static_assert(sizeof(address) == 6, "The size of a MAC address is 6 bytes");
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static_assert(sizeof(header) == 14, "The size of the Ethernet header is 14 bytes");
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/*!
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* \brief Convert a 6 sequential byte MAC address to its single 64bit representation
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*/
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uint64_t mac6_to_mac64(const char* mac);
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/*!
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* \brief Convert a 64bit MAC to its 6 sequential byte MAC address
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* \param input The 64bit MAC input
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* \param mac The output 6 sequential byte MAC address representation
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*/
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void mac64_to_mac6(uint64_t input, char* mac);
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/*!
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* \brief Ethernet layer implementation
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*/
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struct layer {
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/*!
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* \brief Decode a network packet.
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*
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* This must only be called from the network interface.
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*
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* \param interface The interface on which the packet was received
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* \param packet The packet to decode
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*/
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void decode(network::interface_descriptor& interface, packet_p& packet);
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/*!
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* \brief Prepare a packet for the kernel
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* \param interface The interface on which to prepare the packet for
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* \param descriptor The packet descriptor
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* \return the prepared packet or an error
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*/
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std::expected<packet_p> kernel_prepare_packet(network::interface_descriptor& interface, const packet_descriptor& descriptor);
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/*!
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* \brief Prepare a packet for the user
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* \param buffer The buffer to write the packet to
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* \param interface The interface on which to prepare the packet for
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* \param descriptor The packet descriptor
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* \return the prepared packet or an error
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*/
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std::expected<packet_p> user_prepare_packet(char* buffer, network::interface_descriptor& interface, const packet_descriptor* descriptor);
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/*!
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* \brief Finalize a prepared packet
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* \param interface The interface on which to finalize the packet
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* \param p The packet to finalize
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* \return nothing or an error
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*/
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std::expected<void> finalize_packet(network::interface_descriptor& interface, packet_p& p);
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/*!
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* \brief Register the ARP layer
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* \param layer The ARP layer
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*/
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void register_arp_layer(network::arp::layer* layer);
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/*!
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* \brief Register the IP layer
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* \param layer The IP layer
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*/
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void register_ip_layer(network::ip::layer* layer);
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private:
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network::arp::layer* arp_layer; ///< The ARP layer
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network::ip::layer* ip_layer; ///< The IP layer
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};
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} // end of ethernet namespace
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} // end of network namespace
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#endif
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