}
	return nil
}

// SetWriteBuffer sets the size of the operating system's
// transmit buffer associated with the connection.
func (c *conn) SetWriteBuffer(bytes int) error {
	if !c.ok() {
		return syscall.EINVAL
	}
	if err := setWriteBuffer(c.fd, bytes); err != nil {
		return &OpError{Op: "set", Net: c.fd.net, Source: nil, Addr: c.fd.laddr, Err: err}

	if ffd.queue == nil {
		return os.NewSyscallError("setReadBuffer", syscall.EINVAL)
	}
	ffd.queue.setReadBuffer(bytes)
	return nil
}

func (ffd *fakeNetFD) setWriteBuffer(bytes int) error {
	return os.NewSyscallError("setWriteBuffer", syscall.ENOTSUP)
}

func (ffd *fakeNetFD) setLinger(sec int) error {
	if sec < 0 || ffd.peer == nil {
		return os.NewSyscallError("setLinger", syscall.EINVAL)
	}