WindowsAPI获取主机网络配置和网络连接信息

//获取主机网络配置
int GetNetConfigInfo ()
{
    /* Declare and initialize variables */

// It is possible for an adapter to have multiple
// IPv4 addresses, gateways, and secondary WINS servers
// assigned to the adapter. 
//
// Note that this sample code only prints out the 
// first entry for the IP address/mask, and gateway, and
// the primary and secondary WINS server for each adapter. 

    PIP_ADAPTER_INFO pAdapterInfo;
    PIP_ADAPTER_INFO pAdapter = NULL;
    DWORD dwRetVal = 0;
    UINT i;

/* variables used to print DHCP time info */
    struct tm newtime;
    char buffer[32];
    errno_t error;
    char szLogBuffer[512]={
  
  0};

    ULONG ulOutBufLen = sizeof (IP_ADAPTER_INFO);
    pAdapterInfo = (IP_ADAPTER_INFO *) MALLOC(sizeof (IP_ADAPTER_INFO));
    if (pAdapterInfo == NULL) {
        printf("Error allocating memory needed to call GetAdaptersinfo\n");
        return 1;
    }
// Make an initial call to GetAdaptersInfo to get
// the necessary size into the ulOutBufLen variable
    if (GetAdaptersInfo(pAdapterInfo, &ulOutBufLen) == ERROR_BUFFER_OVERFLOW) {
        FREE(pAdapterInfo);
        pAdapterInfo = (IP_ADAPTER_INFO *) MALLOC(ulOutBufLen);
        if (pAdapterInfo == NULL) {
            printf("Error allocating memory needed to call GetAdaptersinfo\n");
            return 1;
        }
    }

    if ((dwRetVal = GetAdaptersInfo(pAdapterInfo, &ulOutBufLen)) == NO_ERROR) {
        pAdapter = pAdapterInfo;
        while (pAdapter) {

            printf("ComboIndex:     %d\n", pAdapter->ComboIndex);
            printf("Adapter Name:     %s\n", pAdapter->AdapterName);
            printf("Adapter Desc:     %s\n", pAdapter->Description);
            printf("Adapter Addr: ");

            for (i = 0; i < pAdapter->AddressLength; i++) {
                if (i == (pAdapter->AddressLength - 1))
                {
                    printf("%.2X\n", (int) pAdapter->Address[i]);
                }   
                else
                {
                    printf("%.2X-", (int) pAdapter->Address[i]);
                }
            }