求助，red hat平台，设置socket选项的问题

Question

我要设置socket的选项：SO_SNDBUF
程序如下：
        /* Set the send buffer size, then fetch it and print its value.  */
        int sendbuff = 65536;
        Setsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, &sendbuff, sizeof(sendbuff));

        optlen = sizeof(sendbuff);
        Getsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, &sendbuff, &optlen);
        printf("send buffer size = %dn", sendbuff);
结果打印出来的是131070 正好翻了一倍，那位朋友知道为何？谢谢

[ 本帖最后由 bluesky339 于 2006-7-7 16:39 编辑 ]