NDA_FREEBSD
{ .type = NDA_FREEBSD, .arg = &_neigh_fbsd_parser, .cb = snl_attr_get_nested },
int off = nlattr_add_nested(nw, NDA_FREEBSD);
{ .type = NDA_FREEBSD, .arg = &neigh_fbsd_parser, .cb = nlattr_get_nested },
int off = snl_add_msg_attr_nested(&nw, NDA_FREEBSD);