SocketExtensions.cs

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using System;
using System.Net;
using System.Net.Sockets;
 
using Tgstation.Server.Host.System;
 
namespace Tgstation.Server.Host.Extensions
{
    static class SocketExtensions
    {
        public static void BindTest(IPlatformIdentifier platformIdentifier, ushort port, bool includeIPv6, bool udp)
        {
            ArgumentNullException.ThrowIfNull(platformIdentifier);
            ProcessExecutor.WithProcessLaunchExclusivity(() =>
            {
                using var socket = new Socket(
                    includeIPv6
                        ? AddressFamily.InterNetworkV6
                        : AddressFamily.InterNetwork,
                    udp
                        ? SocketType.Dgram
                        : SocketType.Stream,
                    udp
                        ? ProtocolType.Udp
                        : ProtocolType.Tcp);
 
                socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ExclusiveAddressUse, true);
                socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, false);
                if (!udp && platformIdentifier.IsWindows)
                    socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.DontLinger, true);
 
                if (includeIPv6)
                    socket.DualMode = true;
 
                socket.Bind(
                    new IPEndPoint(
                        includeIPv6
                            ? IPAddress.IPv6Any
                            : IPAddress.Any,
                        port));
            });
        }
    }
}