Fedor Lyanguzov
21 lines
602 B
Python
21 lines
602 B
Python
mask = [((1 << i) - 1) << (32 - i) for i in range(33)]
|
|
|
|
|
|
def get_data(input_file='cidr4.txt'):
|
|
with open(input_file, "r") as file:
|
|
return file.read().splitlines()
|
|
|
|
|
|
def cidr4_to_node(cidr4: str):
|
|
ip_address, mask_len = cidr4.strip().split("/")
|
|
mask_len = int(mask_len)
|
|
a, b, c, d = list(map(int, ip_address.split(".")))
|
|
ip = a * 256**3 + b * 256**2 + c * 256**1 + d * 256**0
|
|
return ip, mask_len
|
|
|
|
|
|
def make_cidr4(ip, mask_len) -> str:
|
|
lst = [str(ip >> (i << 3) & 0xFF) for i in reversed(range(4))]
|
|
ip_address = ".".join(lst)
|
|
return f"{ip_address}/{mask_len}"
|