UnityECS/Assets/Scripts/Server/ServerConnectionJob.cs

using Unity.Burst;
using Unity.Collections;
using Unity.Jobs;
using Unity.Networking.Transport;
using UnityEngine;

namespace ECSTest
{
    [BurstCompile]
    public struct ServerConnectionJob : IJob
    {
        public NetworkDriver driver;
        public NativeList<NetworkConnection> connectionList;
        public NativeList<int> disconnectIndexList;

        public void Execute()
        {
            // disconnect
            disconnectIndexList.Sort();
            for (int i = disconnectIndexList.Length - 1; i >= 0; --i)
            {
                var index = disconnectIndexList[i];
                connectionList.RemoveAtSwapBack(index);
            }

            disconnectIndexList.Clear();

            // connect
            NetworkConnection c;
            while ((c = driver.Accept()) != default)
            {
                connectionList.Add(c);
                Debug.Log("[Server] Accepted a connection");
            }
            
            if (connectionList.Length > disconnectIndexList.Capacity)
                disconnectIndexList.SetCapacity(connectionList.Length);
        }
    }

}