nameserver.pyā¢10.1 kB
from typing import Optional, Union
from urllib.parse import urlparse
import dns.asyncbackend
import dns.asyncquery
import dns.inet
import dns.message
import dns.query
class Nameserver:
def __init__(self):
pass
def __str__(self):
raise NotImplementedError
def kind(self) -> str:
raise NotImplementedError
def is_always_max_size(self) -> bool:
raise NotImplementedError
def answer_nameserver(self) -> str:
raise NotImplementedError
def answer_port(self) -> int:
raise NotImplementedError
def query(
self,
request: dns.message.QueryMessage,
timeout: float,
source: Optional[str],
source_port: int,
max_size: bool,
one_rr_per_rrset: bool = False,
ignore_trailing: bool = False,
) -> dns.message.Message:
raise NotImplementedError
async def async_query(
self,
request: dns.message.QueryMessage,
timeout: float,
source: Optional[str],
source_port: int,
max_size: bool,
backend: dns.asyncbackend.Backend,
one_rr_per_rrset: bool = False,
ignore_trailing: bool = False,
) -> dns.message.Message:
raise NotImplementedError
class AddressAndPortNameserver(Nameserver):
def __init__(self, address: str, port: int):
super().__init__()
self.address = address
self.port = port
def kind(self) -> str:
raise NotImplementedError
def is_always_max_size(self) -> bool:
return False
def __str__(self):
ns_kind = self.kind()
return f"{ns_kind}:{self.address}@{self.port}"
def answer_nameserver(self) -> str:
return self.address
def answer_port(self) -> int:
return self.port
class Do53Nameserver(AddressAndPortNameserver):
def __init__(self, address: str, port: int = 53):
super().__init__(address, port)
def kind(self):
return "Do53"
def query(
self,
request: dns.message.QueryMessage,
timeout: float,
source: Optional[str],
source_port: int,
max_size: bool,
one_rr_per_rrset: bool = False,
ignore_trailing: bool = False,
) -> dns.message.Message:
if max_size:
response = dns.query.tcp(
request,
self.address,
timeout=timeout,
port=self.port,
source=source,
source_port=source_port,
one_rr_per_rrset=one_rr_per_rrset,
ignore_trailing=ignore_trailing,
)
else:
response = dns.query.udp(
request,
self.address,
timeout=timeout,
port=self.port,
source=source,
source_port=source_port,
raise_on_truncation=True,
one_rr_per_rrset=one_rr_per_rrset,
ignore_trailing=ignore_trailing,
ignore_errors=True,
ignore_unexpected=True,
)
return response
async def async_query(
self,
request: dns.message.QueryMessage,
timeout: float,
source: Optional[str],
source_port: int,
max_size: bool,
backend: dns.asyncbackend.Backend,
one_rr_per_rrset: bool = False,
ignore_trailing: bool = False,
) -> dns.message.Message:
if max_size:
response = await dns.asyncquery.tcp(
request,
self.address,
timeout=timeout,
port=self.port,
source=source,
source_port=source_port,
backend=backend,
one_rr_per_rrset=one_rr_per_rrset,
ignore_trailing=ignore_trailing,
)
else:
response = await dns.asyncquery.udp(
request,
self.address,
timeout=timeout,
port=self.port,
source=source,
source_port=source_port,
raise_on_truncation=True,
backend=backend,
one_rr_per_rrset=one_rr_per_rrset,
ignore_trailing=ignore_trailing,
ignore_errors=True,
ignore_unexpected=True,
)
return response
class DoHNameserver(Nameserver):
def __init__(
self,
url: str,
bootstrap_address: Optional[str] = None,
verify: Union[bool, str] = True,
want_get: bool = False,
http_version: dns.query.HTTPVersion = dns.query.HTTPVersion.DEFAULT,
):
super().__init__()
self.url = url
self.bootstrap_address = bootstrap_address
self.verify = verify
self.want_get = want_get
self.http_version = http_version
def kind(self):
return "DoH"
def is_always_max_size(self) -> bool:
return True
def __str__(self):
return self.url
def answer_nameserver(self) -> str:
return self.url
def answer_port(self) -> int:
port = urlparse(self.url).port
if port is None:
port = 443
return port
def query(
self,
request: dns.message.QueryMessage,
timeout: float,
source: Optional[str],
source_port: int,
max_size: bool = False,
one_rr_per_rrset: bool = False,
ignore_trailing: bool = False,
) -> dns.message.Message:
return dns.query.https(
request,
self.url,
timeout=timeout,
source=source,
source_port=source_port,
bootstrap_address=self.bootstrap_address,
one_rr_per_rrset=one_rr_per_rrset,
ignore_trailing=ignore_trailing,
verify=self.verify,
post=(not self.want_get),
http_version=self.http_version,
)
async def async_query(
self,
request: dns.message.QueryMessage,
timeout: float,
source: Optional[str],
source_port: int,
max_size: bool,
backend: dns.asyncbackend.Backend,
one_rr_per_rrset: bool = False,
ignore_trailing: bool = False,
) -> dns.message.Message:
return await dns.asyncquery.https(
request,
self.url,
timeout=timeout,
source=source,
source_port=source_port,
bootstrap_address=self.bootstrap_address,
one_rr_per_rrset=one_rr_per_rrset,
ignore_trailing=ignore_trailing,
verify=self.verify,
post=(not self.want_get),
http_version=self.http_version,
)
class DoTNameserver(AddressAndPortNameserver):
def __init__(
self,
address: str,
port: int = 853,
hostname: Optional[str] = None,
verify: Union[bool, str] = True,
):
super().__init__(address, port)
self.hostname = hostname
self.verify = verify
def kind(self):
return "DoT"
def query(
self,
request: dns.message.QueryMessage,
timeout: float,
source: Optional[str],
source_port: int,
max_size: bool = False,
one_rr_per_rrset: bool = False,
ignore_trailing: bool = False,
) -> dns.message.Message:
return dns.query.tls(
request,
self.address,
port=self.port,
timeout=timeout,
one_rr_per_rrset=one_rr_per_rrset,
ignore_trailing=ignore_trailing,
server_hostname=self.hostname,
verify=self.verify,
)
async def async_query(
self,
request: dns.message.QueryMessage,
timeout: float,
source: Optional[str],
source_port: int,
max_size: bool,
backend: dns.asyncbackend.Backend,
one_rr_per_rrset: bool = False,
ignore_trailing: bool = False,
) -> dns.message.Message:
return await dns.asyncquery.tls(
request,
self.address,
port=self.port,
timeout=timeout,
one_rr_per_rrset=one_rr_per_rrset,
ignore_trailing=ignore_trailing,
server_hostname=self.hostname,
verify=self.verify,
)
class DoQNameserver(AddressAndPortNameserver):
def __init__(
self,
address: str,
port: int = 853,
verify: Union[bool, str] = True,
server_hostname: Optional[str] = None,
):
super().__init__(address, port)
self.verify = verify
self.server_hostname = server_hostname
def kind(self):
return "DoQ"
def query(
self,
request: dns.message.QueryMessage,
timeout: float,
source: Optional[str],
source_port: int,
max_size: bool = False,
one_rr_per_rrset: bool = False,
ignore_trailing: bool = False,
) -> dns.message.Message:
return dns.query.quic(
request,
self.address,
port=self.port,
timeout=timeout,
one_rr_per_rrset=one_rr_per_rrset,
ignore_trailing=ignore_trailing,
verify=self.verify,
server_hostname=self.server_hostname,
)
async def async_query(
self,
request: dns.message.QueryMessage,
timeout: float,
source: Optional[str],
source_port: int,
max_size: bool,
backend: dns.asyncbackend.Backend,
one_rr_per_rrset: bool = False,
ignore_trailing: bool = False,
) -> dns.message.Message:
return await dns.asyncquery.quic(
request,
self.address,
port=self.port,
timeout=timeout,
one_rr_per_rrset=one_rr_per_rrset,
ignore_trailing=ignore_trailing,
verify=self.verify,
server_hostname=self.server_hostname,
)