使用 Netapi32 库在 C 中获取网络统计信息

Question

我想显示网络统计信息，但无法让此代码工作。这

NetStatisticsGet()

函数返回成功状态，但是当我打印缓冲区内容时，它在每次运行时显示相同的内容。我究竟做错了什么？ Windows 官方文档不是很有帮助。

这是完整的代码：

#include <stdio.h>
#include <windows.h>
#include <lmstats.h>
#include <lmapibuf.h>

NET_API_STATUS status;
LPWSTR lpwsn = L"LanmanWorkstation";
LPBYTE lpBuf;
DWORD dwSize = 0;

int main() {
    while (1) {
        /* Print network stats at 500 ms intervals */
        status = NetStatisticsGet(NULL, lpwsn, 0, 0, &lpBuf);
        printf("lpbuf: %p\n", lpBuf);

        if (status == NERR_Success) {
            LPSTAT_WORKSTATION_0 pStats = (LPSTAT_WORKSTATION_0)lpBuf;
            NetApiBufferSize (lpBuf, &dwSize);

            for (int i = 0; i < dwSize; i++) printf("%02x", lpBuf[i]);
            printf("\n\n");
            
        } else {
            printf("status code %d\n", status);
            return 0;
        }
        Sleep(500);
    }
    NetApiBufferFree(lpBuf);
    return 0;
}

链接：

gcc netstats.c -lNetapi32

输出：

lpbuf: 0000025805c75660
432e32876ce0d901307f080000000000850200000000000000000000000000000000000000000000000000000000000000000000000000009e3d08000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000340000000000000000000000000000004c4d454dd800000038d08401f67f00000000000000000000

lpbuf: 0000025805c74000
432e32876ce0d901307f080000000000860200000000000000000000000000000000000000000000000000000000000000000000000000009e3d08000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000340000000000000000000000000000004c4d454dd800000038d08401f67f00000000000000000000

lpbuf: 0000025805c76160
432e32876ce0d901307f080000000000870200000000000000000000000000000000000000000000000000000000000000000000000000009e3d08000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000340000000000000000000000000000004c4d454dd800000038d08401f67f00000000000000000000

lpbuf: 0000025805c768d0
432e32876ce0d901307f080000000000880200000000000000000000000000000000000000000000000000000000000000000000000000009e3d08000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000340000000000000000000000000000004c4d454dd800000038d08401f67f00000000000000000000

编辑：所以我确实单独打印了字段值，但大多数字段仍然为零。

SmbsTransmitted

字段在每次迭代中都会递增 1，

UseCount

、

StatisticsStartTime

、

BytesReceived

、

BytesTransmitted

字段不为零，但每次迭代都保持不变，而所有其他字段保持为零。谁能帮我理解这里发生了什么？

Answer 1

正如@SimonMourier所说，使用IP Helper和网络列表管理器API。有关更多信息，请参阅IP Helper 入门和获取与网络适配器关联的网络配置文件。