C++ TCP Soketler ile 1 MB+ veri nasıl recv edilir ?

char recvbuf[1024*1024]

    do
    {
    iByteCount = recv(GetSocketId(), buffer,MAXRECV,0);
            if ( iByteCount > 0 )
            {
                printf("Bytes received: %d 
 ",iByteCount);
                 strcat(buf,buffer);
            }
            else if ( iByteCount == 0 )
            {
                   if(strlen(buf)>0)
                   {
                       //do process with received data
                   }
                   else
                  printf("receive failed");
                   break;
            }
            else
                printf("recv failed: ");
                break;
        } while(iByteCount > 0);}