DiscoveryClient.hpp

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#pragma once
 
#include "SDL3_net/SDL_net.h"
 
#include <cstdint>
#include <string>
#include <unordered_map>
#include <vector>
 
class DiscoveryClient
{
public:
    struct DiscoveredServer
    {
        std::string serverName;
        std::string hostIp;
        uint16_t gamePort;
        uint8_t currentPlayers;
        uint8_t maxPlayers;
        uint32_t globalServerId = 0;
        uint64_t lastSeenMs;
    };
 
    bool start(uint16_t discoveryPort);
 
    void stop();
 
    void poll();

    void refresh(bool clearExisting = false);
 
    std::vector<DiscoveredServer> getServers();
 
private:
    uint16_t discoveryPort = 0;
    NET_Address* broadcastAddr = nullptr;
    std::vector<NET_Address*> subnetBroadcastAddrs;
    uint64_t lastRequestMs = 0;
 
    NET_DatagramSocket* socket = nullptr;
 
    std::unordered_map<std::string, DiscoveredServer> discoveredServers; // key is host:port
};