/// <inheritdoc />
public async Task <IPasvListener> CreateTcpListenerAsync(
IFtpConnection connection,
AddressFamily?addressFamily,
int port,
CancellationToken cancellationToken)
{
IPasvListener listener;
if (port < 0)
{
throw new ArgumentOutOfRangeException(nameof(port), "may not be less than 0");
}
var pasvOptions = await _addressResolver.GetOptionsAsync(connection, addressFamily, cancellationToken)
.ConfigureAwait(false);
if (port > 0 && pasvOptions.HasPortRange && (port > pasvOptions.PasvMaxPort || port < pasvOptions.PasvMinPort))
{
throw new ArgumentOutOfRangeException(
nameof(port),
$"must be in {pasvOptions.PasvMinPort}:{pasvOptions.PasvMaxPort}");
}
if (port == 0 && pasvOptions.HasPortRange)
{
listener = CreateListenerInRange(connection, pasvOptions);
}
else
{
listener = new PasvListener(connection.LocalEndPoint.Address, port, pasvOptions.PublicAddress);
}
return(listener);
}
/// <inheritdoc />
public Task <IPasvListener> CreateTcpListener(IFtpConnection connection, int port)
{
IPasvListener listener;
if (port < 0)
{
throw new ArgumentOutOfRangeException(nameof(port), "may not be less than 0");
}
if (port > 0 && _pasvMinPort > 0 && (port > _pasvMaxPort || port < _pasvMinPort))
{
throw new ArgumentOutOfRangeException(nameof(port), $"must be in {_pasvMinPort}:{_pasvMaxPort}");
}
if (port == 0 && _pasvPorts != null)
{
listener = CreateListenerInRange(connection);
}
else
{
listener = new PasvListener(connection.LocalEndPoint.Address, port, PasvExternalAddress);
}
return(Task.FromResult(listener));
}
