Павел
60 lines
1.6 KiB
Python
60 lines
1.6 KiB
Python
import ipaddress
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from ipaddress import IPv4Address
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from typing import List, Tuple
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def get_data(input_file):
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with open(input_file, "r") as file:
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data = file.read().splitlines()
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return data
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def cidr4_to_binary(cidr4: str) -> Tuple[str, int]:
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ip_str, vlsm = cidr4.strip().split("/")
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vlsm = int(vlsm)
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ipv4 = IPv4Address(ip_str)
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binary_ip = bin(int(ipv4))[2:]
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binary_ip = binary_ip.zfill(32)
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return binary_ip, vlsm
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def binary_to_cidr4(binary_ip: str, vlsm: int) -> str:
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int_ip = int(binary_ip, 2)
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ip_str = str(ipaddress.IPv4Address(int_ip))
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return f"{ip_str}/{vlsm}"
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def reduce_bin_ip(bin_ip: str, vlsm: int) -> Tuple[str, int]:
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if vlsm == 0:
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return bin_ip, vlsm
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new_vlsm = vlsm - 1
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new_bin_ip = bin_ip[:new_vlsm] + "0" * (32 - new_vlsm)
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return new_bin_ip, new_vlsm
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def main():
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file = "cidr4.txt"
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data = get_data(file)
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bin_ips = list(map(cidr4_to_binary, data))
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for b in bin_ips[:5]:
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print(b)
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if __name__ == "__main__":
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assert cidr4_to_binary("4.78.139.0/24") == ("00000100010011101000101100000000", 24)
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assert binary_to_cidr4("00000100010011101000101100000000", 24) == "4.78.139.0/24"
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assert reduce_bin_ip("00000100010011101000101100000000", 24) == (
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"00000100010011101000101000000000",
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23,
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)
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assert reduce_bin_ip("10000000000000000000000000000000", 1) == (
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"00000000000000000000000000000000",
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0,
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)
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assert reduce_bin_ip("10000000000000000000000000000000", 0) == (
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"10000000000000000000000000000000",
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0,
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)
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main()
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