_rtattr_begin
return _rtattr_begin(nh, req_sz, rta_type, 0, 0);
peer_attr = _rtattr_begin(nh, req_sz, VETH_INFO_PEER, &pi, sizeof(pi));
peer_attr = _rtattr_begin(nh, req_sz, VETH_INFO_PEER, &pi, sizeof(pi));
return _rtattr_begin(nh, req_sz, rta_type, 0, 0);