创建带有Open.NAT问题的端口映射

如何解决创建带有Open.NAT问题的端口映射

我正在尝试使用库Open.NAT创建端口映射，但收到错误

Open.Nat.MappingException：'无法创建端口映射（协议= Tcp，专用端口= 12630）'

这是我的代码。哪里有问题？

        private static async Task Main()
        {
            NatDiscoverer discoverer = new NatDiscoverer();
            NatDevice device = await discoverer.DiscoverDeviceAsync();

            int port = GetAvailablePort(1000);

            Mapping mapping = new Mapping(Protocol.Tcp,port,"Test mapping");

            await device.CreatePortMapAsync(mapping);    

            Console.WriteLine("The external IP Address is: {0} ",await device.GetExternalIPAsync());

            Console.ReadLine();

            await device.DeletePortMapAsync(mapping);
        }        

此功能用于查找空闲端口

        public static int GetAvailablePort(int startingPort)
        {
            List<int> portArray = new List<int>();

            IPGlobalProperties properties = IPGlobalProperties.GetIPGlobalProperties();
            
            TcpConnectionInformation[] connections = properties.GetActiveTcpConnections();
            portArray.AddRange(from n in connections
                               where n.LocalEndPoint.Port >= startingPort
                               select n.LocalEndPoint.Port);

            
            IPEndPoint[] endPoints = properties.GetActiveTcpListeners();
            portArray.AddRange(from n in endPoints
                               where n.Port >= startingPort
                               select n.Port);

            
            endPoints = properties.GetActiveUdpListeners();
            portArray.AddRange(from n in endPoints
                               where n.Port >= startingPort
                               select n.Port);

            portArray.Sort();

            for (int i = startingPort; i < ushort.MaxValue; i++)
            { 
                if (!portArray.Contains(i))
                {
                    return i;
                }
            }
            return 0;
        }

解决方法

此异常表示端口正在被另一个进程使用

您需要检查12630端口是否已被另一个进程使用，如果需要，请杀死它或更改端口号。

我还建议您检查innerException和/或ErrorCode以获得详细信息

可能的错误代码：

InvalidArguments = 402
ActionFailed = 501
Unathorized = 606
SpecifiedArrayIndexInvalid = 713        
NoSuchEntryInArray = 714
WildCardNotPermittedInSourceIp = 715
WildCardNotPermittedInExternalPort = 716
ConflictInMappingEntry = 718
SamePortValuesRequired = 724
OnlyPermanentLeasesSupported = 725
RemoteHostOnlySupportsWildcard = 726
ExternalPortOnlySupportsWildcard = 727
NoPortMapsAvailable = 728
ConflictWithOtherMechanisms = 729
WildCardNotPermittedInIntPort = 732