type Chan struct {
	dir  ChanDir
	elem Type
}

// A ChanDir value indicates a channel direction.
type ChanDir int

// The direction of a channel is indicated by one of these constants.
const (
	SendRecv ChanDir = iota
	SendOnly
	RecvOnly
)

// NewChan returns a new channel type for the given direction and element type.
func NewChan(dir ChanDir, elem Type) *Chan {
	return &Chan{dir: dir, elem: elem}
}

			// We have channels that differ in direction only.
			// If there's an unrestricted channel, select the restricted one.
			switch {
			case x.dir == SendRecv:
				return y
			case y.dir == SendRecv:
				return x
			}
		}
	}

	// types are different
	return nil

    void resolveSids ( DcerpcHandle handle, LsaPolicyHandle policyHandle, jcifs.SID[] sids ) throws IOException {
        MsrpcLookupSids rpc = new MsrpcLookupSids(policyHandle, sids);
        handle.sendrecv(rpc);
        switch ( rpc.retval ) {
        case 0:
        case NtStatus.NT_STATUS_NONE_MAPPED:
        case 0x00000107: // NT_STATUS_SOME_NOT_MAPPED
            break;
        default:

type Chan struct {
	dir  ChanDir
	elem Type
}

// A ChanDir value indicates a channel direction.
type ChanDir int

// The direction of a channel is indicated by one of these constants.
const (
	SendRecv ChanDir = iota
	SendOnly
	RecvOnly
)

// NewChan returns a new channel type for the given direction and element type.
func NewChan(dir ChanDir, elem Type) *Chan {
	return &Chan{dir: dir, elem: elem}
}

    /**
     * @param buf
     * @param off
     * @param length
     * @param inB
     * @param maxRecvCnt
     * @return len
     * @throws IOException
     */
    int sendrecv ( byte[] buf, int off, int length, byte[] inB, int maxRecvCnt ) throws IOException;

			return nil
		}
		if !types.Identical(ch.Elem(), curr.Elem()) {
			return nil // channel elements are not identical.
		}
		if ch.Dir() == types.SendRecv {
			// ch is bidirectional. We can safely always use curr's direction.
			ch = curr
		} else if curr.Dir() != types.SendRecv && ch.Dir() != curr.Dir() {
			// ch and curr are not bidirectional and not the same direction.
			return nil
		}
	}
	return ch
}

synchronized (this) {
        try {
            state = 1;
            DcerpcMessage bind = new DcerpcBind(binding, this);
            sendrecv(bind);
        } catch (IOException ioe) {
            state = 0;
            throw ioe;
        }
}
    }
    public void sendrecv(DcerpcMessage msg) throws DcerpcException, IOException {
        byte[] stub, frag;
        NdrBuffer buf, fbuf;
        boolean isLast, isDirect;

        }
        return this.output;
    }


    /**
     * 
     * {@inheritDoc}
     *
     * @see jcifs.smb.SmbPipeHandleInternal#sendrecv(byte[], int, int, byte[], int)
     */
    @SuppressWarnings ( "resource" )
    @Override
    public int sendrecv ( byte[] buf, int off, int length, byte[] inB, int maxRecvSize ) throws IOException {
        try ( SmbFileHandleImpl fh = ensureOpen();

                sendrecv(bind);
            }
            catch ( IOException ioe ) {
                this.state = 0;
                throw ioe;
            }
        }
    }


    /**
     * 
     * @param msg
     * @throws DcerpcException
     * @throws IOException
     */
    public void sendrecv ( DcerpcMessage msg ) throws DcerpcException, IOException {

        try ( DcerpcHandle handle = getHandle(ctx, loc, address, "\\PIPE\\netdfs") ) {
            MsrpcDfsRootEnum rpc = new MsrpcDfsRootEnum(loc.getServer());
            handle.sendrecv(rpc);
            if ( rpc.retval != 0 ) {
                throw new SmbException(rpc.retval, true);
            }
            return rpc.getEntries();
        }
    }