ip/ mac 주소 얻기

const char* get_mac()

{

DWORD dwRetVal = 0;

PIP_ADAPTER_INFO pai = 0;

ULONG* pul = 0;

static char buf [20] ={};

ULONG ulOutBufLen = sizeof (IP_ADAPTER_INFO);

pai = (IP_ADAPTER_INFO *)calloc(sizeof (IP_ADAPTER_INFO), 1);

if (pai == NULL) {

printf( "Error allocating memory needed to call GetAdaptersinfo\n");

return 0;

}

if (GetAdaptersInfo(pai, &ulOutBufLen) == ERROR_BUFFER_OVERFLOW) {

pul = new ULONG[ulOutBufLen];

pai = PIP_ADAPTER_INFO(pul);

if (pai == NULL) {

printf( "Error allocating memory needed to call GetAdaptersinfo\n");

return 0;

}

}

if ((dwRetVal = GetAdaptersInfo(pai, &ulOutBufLen)) == NO_ERROR) 

{

while( pai )

{

if( strcmp( pai->IpAddressList.IpAddress.String, "0.0.0.0" ))

break;

pai = pai->Next;

}

BYTE addr [MAX_ADAPTER_ADDRESS_LENGTH] = {};

if(pai)

{

memcpy (addr, pai->Address, sizeof (addr));

sprintf_s( buf, sizeof(buf), "%0.2X-%0.2X-%0.2X-%0.2X-%0.2X-%0.2X", addr[0], addr[1], addr[2], addr[3], addr[4], addr[5] );

}

if(pul)

delete [] pul;

}else{

printf( "Failed to get an AdapterInfo!" );

if(pai)

free(pai);

return 0;

}

return buf;

}

void get_ip()

{

WORD wVersionRequested;

WSADATA wsaData;

char name[255]= {0,};

CString ip;

PHOSTENT hostinfo;

wVersionRequested = MAKEWORD(2,0);

try{

if(WSAStartup(wVersionRequested, & wsaData))

throw WSAGetLastError();

if( gethostname(name, sizeof(name)) || !(hostinfo = gethostbyname(name)))

throw WSAGetLastError();

ip = inet_ntoa (*(struct in_addr *)*hostinfo->h_addr_list);

printf("\n ip : %s \n", ip.GetString());

WSACleanup();

}

catch(int n)

{

WSACleanup();

printf("WSAGetLastError : %d\n",n);

}

}