network_interface.cc

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#include "network_interface.hh"
 
#include "arp_message.hh"
#include "ethernet_frame.hh"
 
#include <iostream>
 
// Dummy implementation of a network interface
// Translates from {IP datagram, next hop address} to link-layer frame, and from link-layer frame to IP datagram
 
// For Lab 5, please replace with a real implementation that passes the
// automated checks run by `make check_lab5`.
 
// You will need to add private members to the class declaration in `network_interface.hh`
 
template <typename... Targs>
void DUMMY_CODE(Targs &&... /* unused */) {}
 
using namespace std;
 
NetworkInterface::NetworkInterface(const EthernetAddress &ethernet_address, const Address &ip_address)
    : _ethernet_address(ethernet_address), _ip_address(ip_address) {
    cerr << "DEBUG: Network interface has Ethernet address " << to_string(_ethernet_address) << " and IP address "
         << ip_address.ip() << "\n";
}
 
void NetworkInterface::send_datagram(const InternetDatagram &dgram, const Address &next_hop) {
    // convert IP address of next hop to raw 32-bit representation (used in ARP header)
    const uint32_t next_hop_ip = next_hop.ipv4_numeric();
 
    DUMMY_CODE(dgram, next_hop, next_hop_ip);
}
 
optional<InternetDatagram> NetworkInterface::recv_frame(const EthernetFrame &frame) {
    DUMMY_CODE(frame);
    return {};
}
 
void NetworkInterface::tick(const size_t ms_since_last_tick) { DUMMY_CODE(ms_since_last_tick); }