VC++/ MFC [MFC] Find local network hosts ip, 로컬네트워크의 IP 주소 알아내기

Enumeration of Computer Names and their IP address

[출처] http://www.codeproject.com/Articles/1133/Enumeration-of-Computer-Names-and-their-IP-address

CString strTemp;
struct hostent *host;

struct in_addr *ptr; // To retrieve the IP Address

DWORD dwScope = RESOURCE_CONTEXT;
NETRESOURCE *NetResource = NULL;
HANDLE hEnum;
WNetOpenEnum( dwScope, NULL, NULL,
             NULL, &hEnum );

WSADATA wsaData;
WSAStartup(MAKEWORD(1,1),&wsaData);

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if ( hEnum )
{
    DWORD Count = 0xFFFFFFFF;
    DWORD BufferSize = 2048;
    LPVOID Buffer = new char[2048];
    WNetEnumResource( hEnum, &Count,
        Buffer, &BufferSize );
    NetResource = (NETRESOURCE*)Buffer;

    char szHostName[200];
    unsigned int i;

    for ( i = 0;
        i < BufferSize/sizeof(NETRESOURCE);
        i++, NetResource++ )
    {
        if ( NetResource->dwUsage ==
            RESOURCEUSAGE_CONTAINER &&
            NetResource->dwType ==
            RESOURCETYPE_ANY )
        {
            if ( NetResource->lpRemoteName )
            {
                CString strFullName =
                    NetResource->lpRemoteName;
                if ( 0 ==
                    strFullName.Left(2).Compare(L"\\") )  
                    strFullName =
                        strFullName.Right(
                            strFullName.GetLength()-2);

                gethostname( szHostName,
                    strlen( szHostName ) );
                host = gethostbyname((CStringA)strFullName);

                if(host == NULL) continue;
                ptr = (struct in_addr *)
                    host->h_addr_list[0];                   

                // Eg. 211.40.35.76 split up like this.            
                int a = ptr->S_un.S_un_b.s_b1;  // 211          
                int b = ptr->S_un.S_un_b.s_b2;  // 40
                int c = ptr->S_un.S_un_b.s_b3;  // 35
                int d = ptr->S_un.S_un_b.s_b4;  // 76

                strTemp.Format(L"%s -->  %d.%d.%d.%d",
                    strFullName,a,b,c,d);
                MessageBox(strTemp);
            }
        }
    }

    delete Buffer;
    WNetCloseEnum( hEnum );
}

WSACleanup();