def print_genl_hdr(ofd, start):
ghdr = genlmsghdr(start)<EOL>ofd('<STR_LIT>', GENL_HDRLEN)<EOL>ofd('<STR_LIT>', ghdr.cmd)<EOL>ofd('<STR_LIT>', ghdr.version)<EOL>ofd('<STR_LIT>', ghdr.reserved)<EOL>
https://github.com/thom311/libnl/blob/libnl3_2_25/lib/msg.c#L821.

    Positional arguments:
    ofd -- function to call with arguments similar to `logging.debug`.
    start -- bytearray() or bytearray_ptr() instance.