LOOKUP_START_IP
if (ip >= LOOKUP_START_IP && ip < LOOKUP_STOP_IP) {
idx = (ip - LOOKUP_START_IP) / LOOKUP_BLOCK_SIZE;
num_entries, LOOKUP_START_IP + (LOOKUP_BLOCK_SIZE * i));
if (ip >= LOOKUP_START_IP && ip < LOOKUP_STOP_IP) {
idx = (ip - LOOKUP_START_IP) / LOOKUP_BLOCK_SIZE;
LOOKUP_START_IP + (LOOKUP_BLOCK_SIZE * i));