public virtual async ValueTask <(int auxHandle, string ipAddress, int portNumber, int timeout)> ConnectionRequestAsync(CancellationToken cancellationToken = default)
{
try
{
await Xdr.WriteAsync(IscCodes.op_connect_request, cancellationToken).ConfigureAwait(false);
await Xdr.WriteAsync(IscCodes.P_REQ_async, cancellationToken).ConfigureAwait(false);
await Xdr.WriteAsync(_handle, cancellationToken).ConfigureAwait(false);
await Xdr.WriteAsync(PartnerIdentification, cancellationToken).ConfigureAwait(false);
await Xdr.FlushAsync(cancellationToken).ConfigureAwait(false);
await ReadOperationAsync(cancellationToken).ConfigureAwait(false);
var auxHandle = await Xdr.ReadInt32Async(cancellationToken).ConfigureAwait(false);
var garbage1 = new byte[8];
await Xdr.ReadBytesAsync(garbage1, 8, cancellationToken).ConfigureAwait(false);
var respLen = await Xdr.ReadInt32Async(cancellationToken).ConfigureAwait(false);
respLen += respLen % 4;
var sin_family = new byte[2];
await Xdr.ReadBytesAsync(sin_family, 2, cancellationToken).ConfigureAwait(false);
respLen -= 2;
var sin_port = new byte[2];
await Xdr.ReadBytesAsync(sin_port, 2, cancellationToken).ConfigureAwait(false);
var portNumber = (ushort)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(sin_port, 0));
respLen -= 2;
// * The address returned by the server may be incorrect if it is behind a NAT box
// * so we must use the address that was used to connect the main socket, not the
// * address reported by the server.
var sin_addr = new byte[4];
await Xdr.ReadBytesAsync(sin_addr, 4, cancellationToken).ConfigureAwait(false);
var ipAddress = _connection.IPAddress.ToString();
respLen -= 4;
var garbage2 = new byte[respLen];
await Xdr.ReadBytesAsync(garbage2, respLen, cancellationToken).ConfigureAwait(false);
await Xdr.ReadStatusVectorAsync(cancellationToken).ConfigureAwait(false);
return(auxHandle, ipAddress, portNumber, _connection.Timeout);
}
catch (IOException ex)
{
throw IscException.ForIOException(ex);
}
}