这样收发UDP数据包可以吗？该如何解决

这样收发UDP数据包可以吗？

C/C++ code

int nRet, nLeft, nIdx;nLeft = 10;nIdx = 0;while ( nLeft > 0 ){    nRet = sendto( s, buf+nIdx, nLeft, 0, (struct sockaddr *)&to, sizeof(to) );    if ( SOCKET_ERROR == nRet )    {        break;    }    nLeft -= nRet;    nIdx += nRet;}nLeft = 10;nIdx = 0;while ( nLeft > 0 ){    nRet = recvfrom( s, buf+nIdx, nLeft, 0, NULL, NULL );    if ( SOCKET_ERROR == nRet )    {        break;    }    nLeft -= nRet;    nIdx += nRet;}