def ctrl_request_update(_, nl_sock_h):
return int(genl_send_simple(nl_sock_h, GENL_ID_CTRL, CTRL_CMD_GETFAMILY, CTRL_VERSION, NLM_F_DUMP))<EOL>
https://github.com/thom311/libnl/blob/libnl3_2_25/lib/genl/ctrl.c#L37.

    Positional arguments:
    nl_sock_h -- nl_sock class instance.

    Returns:
    Integer, genl_send_simple() output.