Chimney.MPD.ChimneyMPDServer.streamSocketListner_ConnectionReceived C# (CSharp) Method

        async void streamSocketListner_ConnectionReceived(StreamSocketListener sender, StreamSocketListenerConnectionReceivedEventArgs args)
        {
            ResponsConfigDictionary[ResponsConfigDictionaryIdCounter] = new ResponseConfig(ResponsConfigDictionaryIdCounter, args.Socket);

            bool allowconnection = false;

            switch (this.allow)
            {
                case ("lan"):
                    Tuple<HostName, HostName> mylocal = GetStartEndIP();
                    List<HostName> mylocalfriends = (mylocal != null) ? GetIpList(mylocal) : null;
                    if(mylocalfriends != null)
                    {
                        var lanfriend = mylocalfriends.SingleOrDefault<HostName>(o => o.DisplayName.Equals(args.Socket.Information.RemoteAddress.DisplayName));
                        if (lanfriend != null) allowconnection = true;
                    }
                    if (args.Socket.Information.RemoteAddress.IPInformation != null)
                    {
                        if (args.Socket.Information.LocalAddress.IPInformation.NetworkAdapter.NetworkAdapterId == args.Socket.Information.RemoteAddress.IPInformation.NetworkAdapter.NetworkAdapterId)
                        {
                            allowconnection = true;
                        }
                    }
                    break;
                case ("any"):
                    allowconnection = true;
                    break;
                default:
                    if (args.Socket.Information.RemoteAddress.IPInformation != null)
                    {
                        if (args.Socket.Information.LocalAddress.IPInformation.NetworkAdapter.NetworkAdapterId == args.Socket.Information.RemoteAddress.IPInformation.NetworkAdapter.NetworkAdapterId)
                        {
                            allowconnection = true;
                        }
                    }
                    break;
            }

            if (allowconnection)
            {
                int responseId = ResponsConfigDictionaryIdCounter;

                ResponsConfigDictionaryIdCounter++;

                bool suc = false;

                try
                {
                    suc = await SendResponse(MPDKeyWords.Response.RESPONSE_SUCCESS_CONNECT, args.Socket);
                }
                catch
                {
                    suc = false;
                }

                if (suc)
                {
                    await ReadResponse(args.Socket, responseId);
                }
            }
        }