学步园

DWORD GetAdaptersInfo(
  __out    PIP_ADAPTER_INFO pAdapterInfo,
  __inout  PULONG pOutBufLen
);

 #include <winsock2.h>
#include <iphlpapi.h>
#include <stdio.h>
#include <stdlib.h>

#define MALLOC(x) HeapAlloc(GetProcessHeap(), 0, (x))
#define FREE(x) HeapFree(GetProcessHeap(), 0, (x))
/* Note: could also use malloc() and free() */

int __cdecl main()
{

    /* 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;

    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("/tComboIndex: /t5d/n", pAdapter->ComboIndex);
            printf("/tAdapter Name: /t%s/n", pAdapter->AdapterName);
            printf("/tAdapter Desc: /t%s/n", pAdapter->Description);
            printf("/tAdapter Addr: /t");
            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]);
            }
            printf("/tIndex: /t%d/n", pAdapter->Index);
            printf("/tType: /t");
            switch (pAdapter->Type) {
            case MIB_IF_TYPE_OTHER:
                printf("Other/n");
                break;
            case MIB_IF_TYPE_ETHERNET:
                printf("Ethernet/n");
                break;
            case MIB_IF_TYPE_TOKENRING:
                printf("Token Ring/n");
                break;
            case MIB_IF_TYPE_FDDI:
                printf("FDDI/n");
                break;
            case MIB_IF_TYPE_PPP:
                printf("PPP/n");
                break;
            case MIB_IF_TYPE_LOOPBACK:
                printf("Lookback/n");
                break;
            case MIB_IF_TYPE_SLIP:
                printf("Slip/n");
                break;
            default:
                printf("Unknown type %ld/n", pAdapter->Type);
                break;
            }

            printf("/tIP Address: /t%s/n",
                   pAdapter->IpAddressList.IpAddress.String);
            printf("/tIP Mask: /t%s/n", pAdapter->IpAddressList.IpMask.String);

            printf("/tGateway: /t%s/n", pAdapter->GatewayList.IpAddress.String);
            printf("/t***/n");

            if (pAdapter->DhcpEnabled) {
                printf("/tDHCP Enabled: Yes/n");
                printf("/t  DHCP Server: /t%s/n",
                       pAdapter->DhcpServer.IpAddress.String);

                printf("/t  Lease Obtained: ");
                /* Display local time */
                error = _localtime32_s(&newtime, &pAdapter->LeaseObtained);
                if (error)
                    printf("Invalid Argument to _localtime32_s/n");
                else {
                    // Convert to an ASCII representation 
                    error = asctime_s(buffer, 32, &newtime);
                    if (error)
                        printf("Invalid Argument to asctime_s/n");
                    else
                        /* asctime_s returns the string terminated by /n/0 */
                        printf("%s", buffer);
                }

                printf("/t  Lease Expires:  ");
                error = _localtime32_s(&newtime, &pAdapter->LeaseExpires);
                if (error)
                    printf("Invalid Argument to _localtime32_s/n");
                else {
                    // Convert to an ASCII representation 
                    error = asctime_s(buffer, 32, &newtime);
                    if (error)
                        printf("Invalid Argument to asctime_s/n");
                    else
                        /* asctime_s returns the string terminated by /n/0 */
                        printf("%s", buffer);
                }
            } else
                printf("/tDHCP Enabled: No/n");

            if (pAdapter->HaveWins) {
                printf("/tHave Wins: Yes/n");
                printf("/t  Primary Wins Server:    %s/n",
                       pAdapter->PrimaryWinsServer.IpAddress.String);
                printf("/t  Secondary Wins Server:  %s/n",
                       pAdapter->SecondaryWinsServer.IpAddress.String);
            } else
                printf("/tHave Wins: No/n");
            pAdapter = pAdapter->Next;
            printf("/n");
        }
    } else {
        printf("GetAdaptersInfo failed with error: %d/n", dwRetVal);

    }
    if (pAdapterInfo)
        FREE(pAdapterInfo);

    return 0;
}