netch/Netch/Interops/AioDNS.cs

using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using Serilog;

namespace Netch.Interops
{
    public static class AioDNS
    {
        private const string aiodns_bin = "aiodns.bin";

        public static bool Dial(NameList name, string value)
        {
            Log.Verbose($"[aiodns] Dial {name}: {value}");
            return aiodns_dial(name, Encoding.UTF8.GetBytes(value));
        }

        public static async Task<bool> InitAsync()
        {
            return await Task.Run(Init).ConfigureAwait(false);
        }
        
        public static async Task FreeAsync()
        {
            await Task.Run(Free).ConfigureAwait(false);
        }

        [DllImport(aiodns_bin, CallingConvention = CallingConvention.Cdecl)]
        private static extern bool aiodns_dial(NameList name, byte[] value);

        [DllImport(aiodns_bin, EntryPoint = "aiodns_init", CallingConvention = CallingConvention.Cdecl)]
        public static extern bool Init();

        [DllImport(aiodns_bin, EntryPoint = "aiodns_free", CallingConvention = CallingConvention.Cdecl)]
        public static extern void Free();

        public enum NameList
        {
            TYPE_REST,
            TYPE_ADDR,
            TYPE_LIST,
            TYPE_CDNS,
            TYPE_ODNS
        }
    }
}