Intern

1. Γράψτε ένα αντικείμενο Python "switches" σε μορφή YAML 2. Μετατρέψτε το "switches" έτσι ώστε να απομένουν μόνο οι διακόπτες "cisco" 3. Χρησιμοποιώντας το τυπικό module ipaddress, λάβετε την τελευταία διεύθυνση του host στο δίκτυο "172.16.0.0/28" 4. Αναλύστε το "dhcp_snooping_table" σε μια λίστα λεξικών με την ακόλουθη μορφή: ```python dhcp_snooping_table_parsed = [ { "mac": "00:E9:BC:3F:A6:50", "ip": "100.1.1.6", "interface": "FastEthernet0/20", }, { "mac": "00:E9:22:11:A6:50", "ip": "100.1.1.7", "interface": "FastEthernet0/21", } ] ``` 5. Γράψτε μια κλάση "NetworkSubnet" με 2 μεθόδους: - get_subnet - επιστρέφει την πρώτη διαθέσιμη υποδίκτυο μήκους που καθορίζεται ως IPv4Network αντικείμενο - show_network_pool - επιστρέφει μια λίστα διαθέσιμων υποδικτύων ```python from ipaddress import IPv4Network class NetworkSubnet: def init(self, aggregate_network: str): ... def get_subnet(self, length: int) -> IPv4Network: ... def show_network_pool(self) -> list[IPv4Network]: ... net = NetworkSubnet(aggregate_network="172.16.0.0/24") net_1 = net.get_subnet(length=26) print(f"{net_1=}") net_1=IPv4Network('172.16.0.0/26') print(net.get_subnet(length=25)) 172.16.0.128/25 print(net.get_subnet(length=30)) 172.16.0.64/30 print(net.show_network_pool()) [IPv4Network('172.16.0.64/30'), IPv4Network('172.16.0.72/29'), IPv4Network('172.16.0.80/28'), IPv4Network('172.16.0.96/27')] ```

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Пример объекта switches в YAML формате:

switches:
  - name: switch1
    vendor: cisco
    ip: 192.168.1.1
  - name: switch2
    vendor: juniper
    ip: 192.168.1.2
  - name: switch3
    vendor: cisco
    ip: 192.168.1.3

Преобразование, чтобы оставить только коммутаторы Cisco:

import yaml

with open('switches.yaml') as f:
    data = yaml.safe_load(f)

cisco_switches = [sw for sw in data['switches'] if sw['vendor'].lower() == 'cisco']

print(cisco_switches)

Получение последнего адреса хоста в сети "172.16.0.0/28":

import ipaddress

network = ipaddress.ip_network('172.16.0.0/28')
last_host = network.broadcast_address - 1
print(last_host)  # 172.16.0.14

Парсинг dhcp_snooping_table в список словарей:

dhcp_snooping_table = '''
MacAddress          IpAddress        Interface
00:E9:BC:3F:A6:50  100.1.1.6       FastEthernet0/20
00:E9:22:11:A6:50  100.1.1.7       FastEthernet0/21
'''

lines = dhcp_snooping_table.strip().split('\n')[1:]  # пропускаем заголовок

parsed = []
for line in lines:
    mac, ip, interface = line.split()
    parsed.append({"mac": mac, "ip": ip, "interface": interface})

print(parsed)

Класс NetworkSubnet с требуемыми методами:

from ipaddress import IPv4Network

class NetworkSubnet:
    def __init__(self, aggregate_network: str):
        self.aggregate = IPv4Network(aggregate_network)
        self.available_subnets = [self.aggregate]

    def get_subnet(self, length: int) -> IPv4Network:
        for i, subnet in enumerate(self.available_subnets):
            if subnet.prefixlen <= length:
                # Разбиваем подсеть на более мелкие
                subnets = list(subnet.subnets(new_prefix=length))
                if subnets:
                    allocated = subnets[0]
                    # Обновляем пул доступных подсетей
                    remaining = subnets[1:] + self.available_subnets[:i] + self.available_subnets[i+1:]
                    self.available_subnets = remaining
                    return allocated
        raise ValueError("Нет доступных подсетей нужного размера")

    def show_network_pool(self) -> list[IPv4Network]:
        return self.available_subnets

# Пример использования
net = NetworkSubnet(aggregate_network="172.16.0.0/24")
net_1 = net.get_subnet(length=26)
print(f"{net_1=}")  # 172.16.0.0/26
print(net.get_subnet(length=25))  # 172.16.0.64/25
print(net.get_subnet(length=30))  # 172.16.0.192/30
print(net.show_network_pool())

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