获取mac地址方法之一 GetAdaptersInfo()

GetAdaptersInfo -20151116 防止返回的mac出现null

20151116

From:http://blog.csdn.net/weiyumingwww/article/details/17554461

转载URL：http://www.cnblogs.com/ourran/p/4968502.html

测试环境win7 x64 vs2013 

 工程下载地址：链接：http://pan.baidu.com/s/1pJAbwgz 密码：ifst

代码改为：

mac.h 内容

#ifndef __MAC_MAC_H
#define __MAC_MAC_H

#include <windows.h>
#include <iphlpapi.h>       // API GetAdaptersInfo 头文件
#include <shlwapi.h>        // API StrCmpIA 头文件
#pragma comment(lib, "iphlpapi.lib")
#pragma comment(lib, "shlwapi.lib")
#include <Strsafe.h>        // API StringCbPrintfA 头文件
#include <shellapi.h>       // API lstrcpyA 头文件

#define BUF_SIZE 254
#define MAX_SIZE 254


UINT GetAdapterCharacteristics(char* adapter_name);
int GetMAC(BYTE mac[BUF_SIZE]);
void GetMacAddress( char* mac );











#endif

mac.c 内容

#include "stdafx.h"
#include "mac.h"

//////////////////////////////////////
// 功能：获取适配器特性
// 参数：
// adapter_name 适配器 ID
// 返回值：成功则返回由参数指定的适配器的特性标志，是一个 DWORD 值，失败返回 0
//
UINT GetAdapterCharacteristics(char* adapter_name)
{
if(adapter_name == NULL || adapter_name[0] == 0)
return 0;

HKEY root = NULL;
// 打开存储适配器信息的注册表根键
if(ERROR_SUCCESS != RegOpenKeyExA(HKEY_LOCAL_MACHINE, "SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}", 0, KEY_READ, &root))
return 0;

DWORD subkeys = 0;
// 获取该键下的子键数
if(ERROR_SUCCESS != RegQueryInfoKeyA(root, NULL, NULL, NULL, &subkeys, NULL, NULL, NULL, NULL, NULL, NULL, NULL))
subkeys = 100;

DWORD ret_value = 0;
for(DWORD i = 0; i < subkeys; i++)
{
// 每个适配器用一个子键存储，子键名为从 0 开始的 4 位数
char subkey[MAX_SIZE];
memset(subkey, 0, MAX_SIZE);
StringCbPrintfA(subkey, MAX_SIZE, "%04u", i);

// 打开该子键
HKEY hKey = NULL;
if(ERROR_SUCCESS != RegOpenKeyExA(root, subkey, 0, KEY_READ, &hKey))
continue;

// 获取该子键对应的适配器 ID，存于 name 中
char name[MAX_PATH];
DWORD type = 0;
DWORD size = MAX_PATH;
if(ERROR_SUCCESS != RegQueryValueExA(hKey, "NetCfgInstanceId", NULL, &type, (LPBYTE)name, &size))
{
RegCloseKey(hKey);
continue;
}

// 对比该适配器 ID 是不是要获取特性的适配器 ID
if(StrCmpIA(name, adapter_name) != 0)
{
RegCloseKey(hKey);
continue;
}

// 读取该适配器的特性标志，该标志存储于值 Characteristics 中
DWORD val = 0;
size = 4;
LSTATUS ls = RegQueryValueExA(hKey, "Characteristics", NULL, &type, (LPBYTE)&val, &size);
RegCloseKey(hKey);

if(ERROR_SUCCESS == ls)
{
ret_value = val;
break;
}
}

RegCloseKey(root);
return ret_value;
}

//////////////////////////////////////
// 功能：获取 Mac 地址的二进制数据
// 参数：
// mac 用于输出 Mac 地址的二进制数据的缓冲区指针
// 返回值：成功返回 mac 地址的长度，失败返回 0，失败时 mac 中保存一些简单的错误信息，可适当修改，用于调试
//
int GetMAC(BYTE mac[BUF_SIZE])
{
#define NCF_PHYSICAL 0x4
DWORD AdapterInfoSize = 0;
if(ERROR_BUFFER_OVERFLOW != GetAdaptersInfo(NULL, &AdapterInfoSize))
{
StringCbPrintfA((LPSTR)mac, BUF_SIZE, "GetMAC Failed! ErrorCode: %d", GetLastError());
return 0;
}

void* buffer = malloc(AdapterInfoSize);
if(buffer == NULL)
{
lstrcpyA((LPSTR)mac, "GetMAC Failed! Because malloc failed!");
return 0;
}

PIP_ADAPTER_INFO pAdapt = (PIP_ADAPTER_INFO)buffer;
if(ERROR_SUCCESS != GetAdaptersInfo(pAdapt, &AdapterInfoSize))
{
StringCbPrintfA((LPSTR)mac, BUF_SIZE, "GetMAC Failed! ErrorCode: %d", GetLastError());
free(buffer);
return 0;
}

int mac_length = 0;
while(pAdapt)
{
if(pAdapt->AddressLength >= 6 && pAdapt->AddressLength <= 8)
{
memcpy(mac, pAdapt->Address, pAdapt->AddressLength);
mac_length = pAdapt->AddressLength;

UINT flag = GetAdapterCharacteristics(pAdapt->AdapterName);
BOOL is_physical = ((flag & NCF_PHYSICAL) == NCF_PHYSICAL);
if(is_physical)
break;
}
pAdapt = pAdapt->Next;
}
free(buffer);
return mac_length;
}

//////////////////////////////////////
// 功能：获取 Mac 地址，使用时直接调用此函数即可
// 参数：
// mac 用于存储 Mac 地址的缓冲区指针
// 返回值：无返回值，函数执行完后会把 Mac 地址以16进制的形式存于参数指定的缓冲区中，若有错误，缓冲区中保存的是错误信息
//
void GetMacAddress( char* mac )
{
BYTE buf[BUF_SIZE];
memset(buf, 0, BUF_SIZE);

int len = GetMAC(buf);
if(len <= 0)
{
lstrcpyA(mac, (LPCSTR)buf);
return;
}

if(len == 6)
StringCbPrintfA(mac, BUF_SIZE, "%02X-%02X-%02X-%02X-%02X-%02X", buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
else
StringCbPrintfA(mac, BUF_SIZE, "%02X-%02X-%02X-%02X-%02X-%02X-%02X-%02X", buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7]);
}

用方法获取到的mac在部分机器上会出现获取到的mac为null;

20150923

From:https://msdn.microsoft.com/en-us/library/aa365917

控制台工程下载地址: 链接：http://pan.baidu.com/s/1o6xjJmy 密码：gyxo

mfc工程下载地址:　链接：http://pan.baidu.com/s/1pJORZw3 密码：djau

GetAdaptersInfo function

 

The GetAdaptersInfo function retrieves adapter information for the local computer.

On Windows XP and later:  Use the GetAdaptersAddresses function instead of GetAdaptersInfo.

Syntax

C++

 

DWORD GetAdaptersInfo(
  _Out_   PIP_ADAPTER_INFO pAdapterInfo,
  _Inout_ PULONG           pOutBufLen
);

Examples

This example retrieves the adapter information and prints various properties of each adapter.

C++

#include <winsock2.h>
#include <iphlpapi.h>
#include <stdio.h>
#include <stdlib.h>
#pragma comment(lib, "IPHLPAPI.lib")

#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
");
        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
");
            return 1;
        }
    }

    if ((dwRetVal = GetAdaptersInfo(pAdapterInfo, &ulOutBufLen)) == NO_ERROR) {
        pAdapter = pAdapterInfo;
        while (pAdapter) {
            printf("	ComboIndex: 	%d
", pAdapter->ComboIndex);
            printf("	Adapter Name: 	%s
", pAdapter->AdapterName);
            printf("	Adapter Desc: 	%s
", pAdapter->Description);
            printf("	Adapter Addr: 	");
            for (i = 0; i < pAdapter->AddressLength; i++) {
                if (i == (pAdapter->AddressLength - 1))
                    printf("%.2X
", (int) pAdapter->Address[i]);
                else
                    printf("%.2X-", (int) pAdapter->Address[i]);
            }
            printf("	Index: 	%d
", pAdapter->Index);
            printf("	Type: 	");
            switch (pAdapter->Type) {
            case MIB_IF_TYPE_OTHER:
                printf("Other
");
                break;
            case MIB_IF_TYPE_ETHERNET:
                printf("Ethernet
");
                break;
            case MIB_IF_TYPE_TOKENRING:
                printf("Token Ring
");
                break;
            case MIB_IF_TYPE_FDDI:
                printf("FDDI
");
                break;
            case MIB_IF_TYPE_PPP:
                printf("PPP
");
                break;
            case MIB_IF_TYPE_LOOPBACK:
                printf("Lookback
");
                break;
            case MIB_IF_TYPE_SLIP:
                printf("Slip
");
                break;
            default:
                printf("Unknown type %ld
", pAdapter->Type);
                break;
            }

            printf("	IP Address: 	%s
",
                   pAdapter->IpAddressList.IpAddress.String);
            printf("	IP Mask: 	%s
", pAdapter->IpAddressList.IpMask.String);

            printf("	Gateway: 	%s
", pAdapter->GatewayList.IpAddress.String);
            printf("	***
");

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

                printf("	  Lease Obtained: ");
                /* Display local time */
                error = _localtime32_s(&newtime, (__time32_t*) &pAdapter->LeaseObtained);
                if (error)
                    printf("Invalid Argument to _localtime32_s
");
                else {
                    // Convert to an ASCII representation 
                    error = asctime_s(buffer, 32, &newtime);
                    if (error)
                        printf("Invalid Argument to asctime_s
");
                    else
                        /* asctime_s returns the string terminated by 
 */
                        printf("%s", buffer);
                }

                printf("	  Lease Expires:  ");
                error = _localtime32_s(&newtime, (__time32_t*) &pAdapter->LeaseExpires);
                if (error)
                    printf("Invalid Argument to _localtime32_s
");
                else {
                    // Convert to an ASCII representation 
                    error = asctime_s(buffer, 32, &newtime);
                    if (error)
                        printf("Invalid Argument to asctime_s
");
                    else
                        /* asctime_s returns the string terminated by 
 */
                        printf("%s", buffer);
                }
            } else
                printf("	DHCP Enabled: No
");

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

    }
    if (pAdapterInfo)
        FREE(pAdapterInfo);

    return 0;
}