private async Task OpenDataConnectionAsync()
{
if (dataConnection != null && dataConnection.IsOpen)
{
await ReplyAsync(FtpReplyCode.TransferStarting, "Transfer is starting");
}
else
{
await ReplyAsync(FtpReplyCode.AboutToOpenDataConnection, "File is Ok, about to open connection.");
switch (dataConnectionMode)
{
case DataConnectionMode.Active:
case DataConnectionMode.ExtendedActive:
await dataConnection.ConnectActiveAsync(userActiveIP, userActiveDataPort, userActiveProtocal);
break;
case DataConnectionMode.Passive:
case DataConnectionMode.ExtendedPassive:
await dataConnection.AcceptAsync();
break;
}
}
if (useSecureDataConnection)
{
await(dataConnection as ISslDataConnection).UpgradeToSslAsync();
}
}