code: def genlmsg_valid_hdr(nlh, hdrlen):
      
      if not nlmsg_valid_hdr(nlh, GENL_HDRLEN):
          return False
  
      ghdr = genlmsghdr(nlmsg_data(nlh))
      if genlmsg_len(ghdr) < NLMSG_ALIGN(hdrlen):
          return False
  
      return True
docs: Validate Generic Netlink message headers.
  
      https://github.com/thom311/libnl/blob/libnl3_2_25/lib/genl/genl.c#L117
  
      Verifies the integrity of the Netlink and Generic Netlink headers by enforcing the following requirements:
      - Valid Netlink message header (`nlmsg_valid_hdr()`)
      - Presence of a complete Generic Netlink header
      - At least `hdrlen` bytes of payload included after the generic Netlink header.
  
      Positional arguments:
      nlh -- Netlink message header (nlmsghdr class instance).
      hdrlen -- length of user header (integer).
  
      Returns:
      True if the headers are valid or False if not.