PF_AA_ACTION
snl_add_msg_attr_u32(&nw, PF_AA_ACTION, pa->action);
{ .type = PF_AA_ACTION, .off = _OUT(action), .cb = snl_attr_get_uint32 },
{ .type = PF_AA_ACTION, .off = _OUT(action), .cb = nlattr_get_uint32 },
nlattr_add_u32(nw, PF_AA_ACTION, attrs.action);