ipconfig的C语言实现

首先，这篇文章实现了两种方法查询IP，实现截图如下：

第一种方法时调用系统命令，代码如下：

#include <cstdlib>
#include <iostream>
using namespace std;
int main(int argc, char *argv[])
{
   system("ipconfig");   
   system("PAUSE");
   return EXIT_SUCCESS;
}

下面这种方法是对源码的解析：

#include <windows.h>
#include <IPHlpApi.h>
#include <stdio.h>
#include <time.h>
#include<Ipexport.h>
#include<Windns.h>
#pragma comment(lib,"Ws2_32")
#pragma comment(lib,"Dnsapi")
#define Max 10 ;
//#include <winsock2.h>
#pragma comment(lib,"IPHlpApi")
void DoUsage(bool);
void DoRelease(bool);// realized
void DoRenew(bool);//realized
void DoDisplayDns(bool);
void DoFlushDns(bool);
void DoAll(void);
void GetInterfaceInfo(void);
//LPCTSTR GetNodeTypeName(UINT nodeType);
//LPCTSTR GetInterfaceTypeName(UINT InterfaceType);
 IP_ADAPTER_INDEX_MAP adapterInfo;
 PIP_INTERFACE_INFO pInfo;
DWORD checkReturn;
void main(int argc,char **argv)
{
bool doUsage=false;
bool doAll=false;
bool doRelease=false;
bool doRenew=false;
bool doDisplayDns=false;
bool doFlushDns=false;
char *argument;   //store the command line code
argument=&argv[1][1];

if((argc>1)&&(argv[1][0]=='/'))
{
   if(!strcmp(argument,"?"))
   {
       doUsage=true;
       DoUsage(doUsage);
   }
  if(!strcmp(argument,"all"))
  {
    doUsage=true;
    DoAll();
  
  
  }

  if(!strcmp(argument,"release"))
  {
    doRelease=true;
    DoRelease(doRelease);
  }

  if(!strcmp(argument,"renew"))
  {
    doRenew=true;
    DoRenew(doRenew);
  
  }

  if(!strcmp(argument,"displaydns"))
  {
    doDisplayDns=true;
    DoDisplayDns(doDisplayDns);
  
  }

  if(!strcmp(argument,"flushdns"))
  {
    doFlushDns=true;
    DoFlushDns(doFlushDns);
  
  }

}
else
printf("error command code!");
printf("......................................");

}


/* get the using adapter information*/

void  GetInterfaceInfo()
{
   
     ULONG outBufferLen=0;
     pInfo=(IP_INTERFACE_INFO *)malloc(sizeof(IP_INTERFACE_INFO));
/* Make the first call to buffer information*/
   if((checkReturn=GetInterfaceInfo(pInfo,&outBufferLen))==ERROR_INSUFFICIENT_BUFFER)
   {
     free(pInfo);
     pInfo=(IP_INTERFACE_INFO *)malloc(outBufferLen);

   }

/* Make the second call of GetInterfaceInfo() to get the actual data */

   if((checkReturn=GetInterfaceInfo(pInfo,&outBufferLen))==NO_ERROR)
   {
     adapterInfo=pInfo->Adapter[0];//关键此处返回IP_ADAPTER_INDEX_MAP 用于IP更新
     printf("the dapter name is: %d ",pInfo->Adapter[0].Name);
     

   }
     else
     {

        printf("Get the interface information occer error!");
        

     }


}



/* release IP address */

void DoRelease(bool doRelease)
{
  if(doRelease)
  {
    
   GetInterfaceInfo();
/**the specific action to config/release*/
    if((checkReturn=IpReleaseAddress(&adapterInfo))==NO_ERROR)
    {
        printf("the action of release IP work!");
    }
    else
       printf("An error occured while releasing interface of %s",pInfo->Adapter[0].Name);

}
  else
  {
  printf("illegal action");

  }

}

/** Do renew IPAddree */

void DoRenew(bool doRenew)
{

 if(doRenew)
 {
    GetInterfaceInfo();

    if((checkReturn=IpRenewAddress(&adapterInfo))==NO_ERROR)
    {
        printf("the action of release IP work!");
    }
    else
       printf("An error occured while releasing interface of %s",pInfo->Adapter[0].Name);

 }
    
    else
  {
  printf("illegal action");

  }
}

/* display all information  ipconfig/all */


void DoAll(void)

{

    DWORD  returnCheckError;
    PFIXED_INFO pFixedInfo;
    DWORD FixedInfoSize = 0;

    PIP_ADDR_STRING pAddrStr;
    PIP_ADAPTER_INFO pAdapt,pAdapterInfo;

    if ((returnCheckError = GetNetworkParams(NULL, &FixedInfoSize)) != 0)
    {
        if (returnCheckError != ERROR_BUFFER_OVERFLOW)
        {
            printf("GetNetworkParams sizing failed with error %d
", returnCheckError);
            return;
        }
    }

    // Allocate memory from sizing information
    if ((pFixedInfo = (PFIXED_INFO) malloc( FixedInfoSize)) == NULL)
    {
        printf("Memory allocation error
");
        return;
    }

    if ((returnCheckError = GetNetworkParams(pFixedInfo, &FixedInfoSize)) == 0)
    {
        printf("	Host Name . . . . . . . . . : %s
", pFixedInfo->HostName);
        printf("	DNS Servers . . . . . . . . : %s
", pFixedInfo->DnsServerList.IpAddress.String);
        pAddrStr = pFixedInfo->DnsServerList.Next;
        while(pAddrStr)
        {
            printf("%52s
", pAddrStr->IpAddress.String);
            pAddrStr = pAddrStr->Next;
        }

        printf("	Node Type . . . . . . . . . : ");
        switch (pFixedInfo->NodeType)
        {
            case 1:
                printf("%s
", "Broadcast");
                break;
            case 2:
                printf("%s
", "Peer to peer");
                break;
            case 4:
                printf("%s
", "Mixed");
                break;
            case 8:
                printf("%s
", "Hybrid");
                break;
            default:
                printf("
");
        }

        printf("	NetBIOS Scope ID. . . . . . : %s
", pFixedInfo->ScopeId);
        printf("	IP Routing Enabled. . . . . : %s
", (pFixedInfo->EnableRouting ? "yes" : "no"));
        printf("	WINS Proxy Enabled. . . . . : %s
", (pFixedInfo->EnableProxy ? "yes" : "no"));
        printf("	NetBIOS Resolution Uses DNS : %s
", (pFixedInfo->EnableDns ? "yes" : "no"));
    } else
    {
        printf("GetNetworkParams failed with error %d
", returnCheckError);
        return;
    }



    //
    // Enumerate all of the adapter specific information using the IP_ADAPTER_INFO structure.
    // Note:  IP_ADAPTER_INFO contains a linked list of adapter entries.
     
    ULONG AdapterInfoSize = 0;
    if ((returnCheckError = GetAdaptersInfo(NULL, &AdapterInfoSize)) != 0)
    {
        if (returnCheckError != ERROR_BUFFER_OVERFLOW)
        {
            printf("GetAdaptersInfo sizing failed with error %d
", returnCheckError);
            return;
        }
    }

    // Allocate memory from sizing information
    if ((pAdapterInfo = (PIP_ADAPTER_INFO) GlobalAlloc(GPTR, AdapterInfoSize)) == NULL)
    {
        printf("Memory allocation error
");
        return;
    }

    // Get actual adapter information
    if ((returnCheckError = GetAdaptersInfo(pAdapterInfo, &AdapterInfoSize)) != 0)
    {
        printf("GetAdaptersInfo failed with error %d
", returnCheckError);
        return;
    }

    pAdapt = pAdapterInfo;

    while (pAdapt)
    {
        switch (pAdapt->Type)
        {
            case MIB_IF_TYPE_ETHERNET:
                printf("
Ethernet adapter ");
                break;
            case MIB_IF_TYPE_TOKENRING:
                printf("
Token Ring adapter ");
                break;
            case MIB_IF_TYPE_FDDI:
                printf("
FDDI adapter ");
                break;
            case MIB_IF_TYPE_PPP:
                printf("
PPP adapter ");
                break;
            case MIB_IF_TYPE_LOOPBACK:
                printf("
Loopback adapter ");
                break;
            case MIB_IF_TYPE_SLIP:
                printf("
Slip adapter ");
                break;
            case MIB_IF_TYPE_OTHER:
            default:
                printf("
Other adapter ");
        }
        printf("%s:

", pAdapt->AdapterName);

        printf("	Description . . . . . . . . : %s
", pAdapt->Description); 

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

        printf("	DHCP Enabled. . . . . . . . : %s
", (pAdapt->DhcpEnabled ? "yes" : "no"));

        pAddrStr = &(pAdapt->IpAddressList);
        while(pAddrStr)
        {
            printf("	IP Address. . . . . . . . . : %s
", pAddrStr->IpAddress.String);
            printf("	Subnet Mask . . . . . . . . : %s
", pAddrStr->IpMask.String);
            pAddrStr = pAddrStr->Next;
        }

        printf("	Default Gateway . . . . . . : %s
", pAdapt->GatewayList.IpAddress.String);
        pAddrStr = pAdapt->GatewayList.Next;
        while(pAddrStr)
        {
            printf("%52s
", pAddrStr->IpAddress.String);
            pAddrStr = pAddrStr->Next;
        }

        printf("	DHCP Server . . . . . . . . : %s
", pAdapt->DhcpServer.IpAddress.String);
        printf("	Primary WINS Server . . . . : %s
", pAdapt->PrimaryWinsServer.IpAddress.String);
        printf("	Secondary WINS Server . . . : %s
", pAdapt->SecondaryWinsServer.IpAddress.String);

        struct tm *newtime;

        // Display coordinated universal time - GMT 
        newtime = gmtime(&pAdapt->LeaseObtained);   
        printf( "	Lease Obtained. . . . . . . : %s", asctime( newtime ) );

        newtime = gmtime(&pAdapt->LeaseExpires);   
        printf( "	Lease Expires . . . . . . . : %s", asctime( newtime ) );

        pAdapt = pAdapt->Next;
    }
}

void DoUsage(bool doUsage)
{

    if(doUsage)
    {
    printf("
USAGE:
"
    "    ipconfig [/? | /all | /renew [adapter] | /release [adapter] |
"
    "              /flushdns | /displaydns | /registerdns |
"
    "              /showclassid adapter |
"
    "              /setclassid adapter [classid] ]
"
    "
"
    "where
"
    "    adapter         Connection name
"
    "                   (wildcard characters * and ? allowed, see examples)
"
    "
"
    "    Options:
"
    "       /?           Display this help message
"
    "       /all         Display full configuration information.
"
    "       /release     Release the IP address for the specified adapter.
"
    "       /renew       Renew the IP address for the specified adapter.
"
    "       /flushdns    Purges the DNS Resolver cache.
"
    "       /registerdns Refreshes all DHCP leases and re-registers DNS names.
"
    "       /displaydns  Display the contents of the DNS Resolver Cache.
"
    "       /showclassid Displays all the dhcp class IDs allowed for adapter.
"
    "       /setclassid  Modifies the dhcp class id.
"
    "
"
    "The default is to display only the IP address, subnet mask and
"
    "default gateway for each adapter bound to TCP/IP.
"
    "
"
    "For Release and Renew, if no adapter name is specified, then the IP address
"
    "leases for all adapters bound to TCP/IP will be released or renewed.
"
    "
"
    "For Setclassid, if no ClassId is specified, then the ClassId is removed.
"
    "
"
    "Examples:
"
    "    > ipconfig                   ... Show information.
"
    "    > ipconfig /all              ... Show detailed information
"
    "    > ipconfig /renew            ... renew all adapters
"
    "    > ipconfig /renew EL*        ... renew any connection that has its
"
    "                                     name starting with EL
"
    "    > ipconfig /release *Con*    ... release all matching connections,
"
    "                                     eg. "Local Area Connection 1" or
"
    "                                         "Local Area Connection 2"
");
    
    
    
    
    }

    else
    {
    printf("ilegal code!");
    
    }



}
void DoDisplayDns(bool doDisplayDns)

{
if(doDisplayDns)
{
    char hostname[256];
    int iRet = 0;
    WSADATA wsaData;

     DNS_STATUS status;               //Return value of  DnsQuery_A() function.
    PDNS_RECORD pDnsRecord; 
    int assignBuffLenght;
    assignBuffLenght=(sizeof(DNS_RECORD))*Max;
    pDnsRecord=(DNS_RECORD*)malloc(assignBuffLenght);
    memset(pDnsRecord,0,assignBuffLenght);


    if (WSAStartup(MAKEWORD(2,1),&wsaData)) //调用Windows Sockets DLL
    { 
        printf("Winsock无法初始化!
");
        WSACleanup();
    
    }
    
    memset(hostname, 0, 256);
    iRet = gethostname(hostname, sizeof(hostname));
    if(iRet != 0 )
    {
        printf( "get hostname error:%d
", iRet);
    }
    printf("%s
", hostname);




    LPSTR pOwnerName=hostname;

      // Calling function DnsQuery to query Host or PTR records   
    status = DnsQuery(pOwnerName,                 //Pointer to OwnerName. 
                        DNS_TYPE_A,                      //Type of the record to be queried.
                        DNS_QUERY_STANDARD,     // Bypasses the resolver cache on the lookup. 
                        NULL,                   //Contains DNS server IP address.
                        &pDnsRecord,                //Resource record that contains the response.
                        NULL);                     //Reserved for future use.

    //  printf("The host name is %s  
",(pDnsRecord->Data.PTR.pNameHost));
    while(pDnsRecord){
            printf("The host name is  %s 
",pDnsRecord->pName);
            printf("the type is %d 
",pDnsRecord->wType);
            printf("the lenght of data is %d 
", pDnsRecord->wDataLength);
            printf(" the time to live is  %d 
", pDnsRecord-> dwTtl);
            printf("the lenght of data id %d 
", pDnsRecord-> dwReserved);

         pDnsRecord=pDnsRecord->pNext;
    }
    
    
printf("dnsCache print over");
}
else
{
printf("ilegal code");

}

}


void DoFlushDns(bool){


printf("relizing config/flushdns!");



}

转载自：http://blog.csdn.net/dlutbrucezhang/article/details/8577712