API utilisée pour connaître l'adresse IP de l'interface dans VC++?

Question

Je veux connaître le nom de l'API qui connaissait l'adresse IP actuelle de l'interface. J'ai deux interface ethernet et WLAN.Both Interface sont UP et je veux savoir IP de l'interface spécifique puis Y at-il une API dans VC++ qui va me donner l'interface IP?

Merci, Neel

Answer 1

GetAdaptersInfo ou GetAdaptersAddresses.

Answer 2

utilisation DnsQuery

 

/************************************************************\ 
    THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF 
    ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO 
    THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A 
    PARTICULAR PURPOSE. 

    Copyright © 2000 Microsoft Corporation. All Rights Reserved. 

/***************************************************************/ 


/* 
    FILE:   Dnsquery.cpp 
    DESCRIPTION: This sample illustrates the use of DnsQuery() function to send query to 
        a DNS server to resolve the host name to an IP address and vice-versa. 

    PLATFORM:  Windows 2000 
    WRITTEN BY: Rashmi Anoop 
    DATE:   3/22/2000 


*/ 

/*  
    includes 
*/ 


#include <windows.h> //windows 
#include <windns.h> //DNS api's 
#include <stdio.h> //standard i/o 
#include <winsock.h> //winsock 

#define BUFFER_LEN 255 


//Usage of the program 
void Usage(char *progname) { 
    fprintf(stderr,"Usage\n%s -n [OwnerName] -t [Type] -s [DnsServerIp]\n", 
      progname); 
    fprintf(stderr,"Where:\n\t\"OwnerName\" is name of the owner of the record set being queried\n"); 
    fprintf(stderr,"\t\"Type\" is the type of record set to be queried A or PTR\n"); 
    fprintf(stderr,"\t\"DnsServerIp\"is the IP address of DNS server (in dotted decimal notation)"); 
    fprintf(stderr,"to which the query should be sent\n"); 
    exit(1); 
} 

// the main function  
void __cdecl main(int argc, char *argv[]) 

{ 

    DNS_STATUS status;    // return value of DnsQuery_A() function. 
    PDNS_RECORD pDnsRecord;   //pointer to DNS_RECORD structure 
    PIP4_ARRAY pSrvList = NULL;  //pinter to IP4_ARRAY structure 
    LPTSTR pOwnerName = NULL;  //owner name to be queried  
    WORD wType;      //Type of the record to be queried 
    char DnsServIp[BUFFER_LEN];  //DNS server ip address 
    DNS_FREE_TYPE freetype ; 
    freetype = DnsFreeRecordListDeep; 
    IN_ADDR ipaddr; 


    if (argc > 4) { 

     for (int i = 1; i < argc ; i++) { 

      if ((argv[i][0] == '-') || (argv[i][0] == '/')) { 

       switch (tolower(argv[i][1])) { 

       case 'n': 
        pOwnerName = argv[++i]; 
        break; 

       case 't': 
        if (!_stricmp(argv[i+1], "A")) 
         wType = DNS_TYPE_A; //Query host records to resolve a name 
        else if (!_stricmp(argv[i+1], "PTR")) 
         wType = DNS_TYPE_PTR; //Query PTR records to resovle an IP address 
        else 
         Usage(argv[0]); 
        i++; 
        break; 

       case 's': 
        // Allocate memory for IP4_ARRAY structure 
        pSrvList = (PIP4_ARRAY) LocalAlloc(LPTR,sizeof(IP4_ARRAY)); 
        if (!pSrvList) { 
         printf("Memory allocation failed \n"); 
         exit(1); 
        } 
        if (argv[++i]) { 
         strncpy(DnsServIp, argv[i], sizeof(DnsServIp)-1); 
         DnsServIp[sizeof(DnsServIp)-1] = '\0'; 
         pSrvList->AddrCount = 1; 
         pSrvList->AddrArray[0] = inet_addr(DnsServIp); //DNS server IP address 
         if (pSrvList->AddrArray[0] == INADDR_NONE) { 
          printf("Invalid DNS server IP address \n"); 
          Usage(argv[0]); 
         } 
         break;  
        } 

       default: 
        Usage(argv[0]); 
        break; 
       } 
      } 
      else 
       Usage(argv[0]);   
     }  

    } 
    else 
     Usage(argv[0]); 


    // Calling function DnsQuery_A() to query Host or PTR records  

    status = DnsQuery_A(pOwnerName,     //pointer to OwnerName  
         wType,      //Type of the record to be queried 
         DNS_QUERY_BYPASS_CACHE,  // Bypasses the resolver cache on the lookup.  
         pSrvList,     //contains DNS server IP address 
         &pDnsRecord,    //Resource record comprising the response 
         NULL);      //reserved for future use 

    if (status) { 
     if (wType == DNS_TYPE_A) 
      printf("Failed to query the host record for %s and the error is %d \n", pOwnerName, status); 
     else 
      printf("Failed to query the PTR record and the error is %d \n", status); 
    } 
    else { 
     if (wType == DNS_TYPE_A) { 

      //convert the Internet network address into a string 
      //in Internet standard dotted format. 
      ipaddr.S_un.S_addr = (pDnsRecord->Data.A.IpAddress); 
      printf("The IP address of the host %s is %s \n", pOwnerName,inet_ntoa(ipaddr)); 

      // Free memory allocated for DNS records  


      DnsRecordListFree(pDnsRecord, freetype); 
     } 
     else { 
      printf("The host name is %s \n",(pDnsRecord->Data.PTR.pNameHost)); 

      // Free memory allocated for DNS records  


      DnsRecordListFree(pDnsRecord, freetype); 
     } 
    } 
    LocalFree(pSrvList); 

} 
 

sortie:

DNSQuery.exe -n -t localhost A
L'adresse IP de l'hôte local hôte est 127.0.0.1