PF_RT_RIDENTIFIER
snl_add_msg_attr_u32(nw, PF_RT_RIDENTIFIER, r->ridentifier);
{ .type = PF_RT_RIDENTIFIER, .off = _OUT(r.ridentifier), .cb = snl_attr_get_uint32 },
{ .type = PF_RT_RIDENTIFIER, .off = _OUT(ridentifier), .cb = nlattr_get_uint32 },
nlattr_add_u32(nw, PF_RT_RIDENTIFIER, rule->ridentifier);