code: def nla_for_each_attr(head, len_, rem):
      
      pos = head
      rem.value = len_
      while nla_ok(pos, rem):
          yield pos
          pos = nla_next(pos, rem)
docs: Iterate over a stream of attributes.
  
      https://github.com/thom311/libnl/blob/libnl3_2_25/include/netlink/attr.h#L262
  
      Positional arguments:
      head -- first nlattr with more in its bytearray payload (nlattr class instance).
      len_ -- length of attribute stream (integer).
      rem -- initialized to len, holds bytes currently remaining in stream (c_int).
  
      Returns:
      Generator yielding nlattr instances.