62 lines
1.8 KiB
Python
62 lines
1.8 KiB
Python
from __future__ import annotations
|
|
|
|
from ipaddress import IPv4Address
|
|
from typing import Optional
|
|
|
|
from pydantic import BaseModel
|
|
|
|
|
|
class DNSRequest(BaseModel):
|
|
"""Represents a DNS Request packet of a network frame.
|
|
|
|
:param domain_name_request: Domain Name Request for IP address.
|
|
"""
|
|
|
|
domain_name_request: str
|
|
"Domain Name Request for IP address."
|
|
|
|
|
|
class DNSReply(BaseModel):
|
|
"""Represents a DNS Reply packet of a network frame.
|
|
|
|
:param domain_name_ip_address: IP Address of the Domain Name requested.
|
|
"""
|
|
|
|
domain_name_ip_address: Optional[IPv4Address] = None
|
|
"IP Address of the Domain Name requested."
|
|
|
|
|
|
class DNSPacket(BaseModel):
|
|
"""
|
|
Represents the DNS layer of a network frame.
|
|
|
|
:param dns_request: DNS Request packet sent by DNS Client.
|
|
:param dns_reply: DNS Reply packet generated by DNS Server.
|
|
|
|
:Example:
|
|
|
|
>>> dns_request = DNSPacket(
|
|
... domain_name_request=DNSRequest(domain_name_request="www.google.co.uk"),
|
|
... dns_reply=None
|
|
... )
|
|
>>> dns_response = DNSPacket(
|
|
... dns_request=DNSRequest(domain_name_request="www.google.co.uk"),
|
|
... dns_reply=DNSReply(domain_name_ip_address=IPv4Address("142.250.179.227"))
|
|
... )
|
|
"""
|
|
|
|
dns_request: DNSRequest
|
|
"DNS Request packet sent by DNS Client."
|
|
dns_reply: Optional[DNSReply] = None
|
|
"DNS Reply packet generated by DNS Server."
|
|
|
|
def generate_reply(self, domain_ip_address: IPv4Address) -> DNSPacket:
|
|
"""Generate a new DNSPacket to be sent as a response with a DNS Reply packet which contains the IP address.
|
|
|
|
:param domain_ip_address: The IP address that was being sought after from the original target domain name.
|
|
:return: A new instance of DNSPacket.
|
|
"""
|
|
self.dns_reply = DNSReply(domain_name_ip_address=domain_ip_address)
|
|
|
|
return self
|