IP address

#include<WinSock2.h>
#include<iphlpapi.h>
#include<stdio.h>
#include<stdlib.h>
#include<Windows.h>
#pragma comment(lib, "IPHLPAPI.lib")
#define BUFF_SIZE 15000


int main(void )
{
   PIP_ADAPTER_ADDRESSES pAddresses = NULL;
   //DWORD len;
   DWORD retval=0;
   ULONG iterations=0;
   ULONG outBufLen=BUFF_SIZE;
   ULONG size=0;
   DWORD size2=0;
   WSADATA wsaData;
   char op[256];
   LPSOCKADDR lp=NULL;
  do
  {
	  pAddresses = (IP_ADAPTER_ADDRESSES *) malloc(outBufLen);
     if(pAddresses==NULL)
     {
	   printf("\n The buffer memory could not be allocated ");
	   return 1;
     }


	 retval=GetAdaptersAddresses(AF_UNSPEC,GAA_FLAG_INCLUDE_PREFIX, NULL, pAddresses, &outBufLen);
	 if(retval==ERROR_BUFFER_OVERFLOW)
	 {
	   free(pAddresses);
	   pAddresses=NULL;
	 }

	 else
	 break;

	 iterations++;




  }while((retval==ERROR_BUFFER_OVERFLOW)&&(iterations<3));


   printf(" Return value = %d ",retval);

   if(retval==NO_ERROR)
   {
    while (pAddresses) {

            printf("\tAdapter name: %s\n", pAddresses->AdapterName);

            printf("Description: %wS\n", pAddresses->Description);

		 retval = WSAStartup(MAKEWORD(2, 2), &wsaData);
          if (retval != 0)
          {
              printf("WSAStartup() failed with error code %d\n", WSAGetLastError());
                return 1;
          }
    else
        printf("WSAStartup() is OK...\n");


		    size=256;

			lp=pAddresses->FirstUnicastAddress->Address.lpSockaddr;
			size2=pAddresses->FirstUnicastAddress->Address.iSockaddrLength;
			if(WSAAddressToStringA(lp,size2,NULL,op,&size)!= 0)
            {
                        printf("This thing has failed \n");
						printf("errordetail: %i\n", WSAGetLastError());

                        return 1;
            }
            else
                        printf("\t The ip address is  = %s\n", op);


            pAddresses = pAddresses->Next;
        }
   }
   else
   {
	   printf("\n We have attempted thrice and there has been no output :(  ");
	   free(pAddresses);
   }


}