def is_http(header_bytes: bytes) -> bool:
    """
    Returns True if the header is an HTTP request.
    """

def is_ssh(header_bytes: bytes) -> bool:
    """
    Returns True if the header is an SSH request.
    """

def write(fd: int, header_bytes: bytes) -> int:
    """
    Sends data chunked to the client.
    """

def read(fd: int, length: int) -> bytes:
    """
    Read n bytes from the client. Will not block.
    """