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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Address objects for network connections.
"""
import os
from typing import Optional, Union
from warnings import warn
from zope.interface import implementer
import attr
from typing_extensions import Literal
from twisted.internet.interfaces import IAddress
from twisted.python.filepath import _asFilesystemBytes, _coerceToFilesystemEncoding
from twisted.python.runtime import platform
@implementer(IAddress)
@attr.s(hash=True, auto_attribs=True)
class IPv4Address:
"""
An L{IPv4Address} represents the address of an IPv4 socket endpoint.
@ivar type: A string describing the type of transport, either 'TCP' or
'UDP'.
@ivar host: A string containing a dotted-quad IPv4 address; for example,
"127.0.0.1".
@type host: C{str}
@ivar port: An integer representing the port number.
@type port: C{int}
"""
type: Union[Literal["TCP"], Literal["UDP"]] = attr.ib(
validator=attr.validators.in_(["TCP", "UDP"])
)
host: str
port: int
@implementer(IAddress)
@attr.s(hash=True, auto_attribs=True)
class IPv6Address:
"""
An L{IPv6Address} represents the address of an IPv6 socket endpoint.
@ivar type: A string describing the type of transport, either 'TCP' or
'UDP'.
@ivar host: A string containing a colon-separated, hexadecimal formatted
IPv6 address; for example, "::1".
@type host: C{str}
@ivar port: An integer representing the port number.
@type port: C{int}
@ivar flowInfo: the IPv6 flow label. This can be used by QoS routers to
identify flows of traffic; you may generally safely ignore it.
@type flowInfo: L{int}
@ivar scopeID: the IPv6 scope identifier - roughly analagous to what
interface traffic destined for this address must be transmitted over.
@type scopeID: L{int} or L{str}
"""
type: Union[Literal["TCP"], Literal["UDP"]] = attr.ib(
validator=attr.validators.in_(["TCP", "UDP"])
)
host: str
port: int
flowInfo: int = 0
scopeID: Union[str, int] = 0
@implementer(IAddress)
class _ProcessAddress:
"""
An L{interfaces.IAddress} provider for process transports.
"""
@attr.s(hash=True, auto_attribs=True)
@implementer(IAddress)
class HostnameAddress:
"""
A L{HostnameAddress} represents the address of a L{HostnameEndpoint}.
@ivar hostname: A hostname byte string; for example, b"example.com".
@type hostname: L{bytes}
@ivar port: An integer representing the port number.
@type port: L{int}
"""
hostname: bytes
port: int
@attr.s(hash=False, repr=False, eq=False, auto_attribs=True)
@implementer(IAddress)
class UNIXAddress:
"""
Object representing a UNIX socket endpoint.
@ivar name: The filename associated with this socket.
@type name: C{bytes}
"""
name: Optional[bytes] = attr.ib(
converter=attr.converters.optional(_asFilesystemBytes)
)
if getattr(os.path, "samefile", None) is not None:
def __eq__(self, other: object) -> bool:
"""
Overriding C{attrs} to ensure the os level samefile
check is done if the name attributes do not match.
"""
if not isinstance(other, self.__class__):
return NotImplemented
res = self.name == other.name
if not res and self.name and other.name:
try:
return os.path.samefile(self.name, other.name)
except OSError:
pass
except (TypeError, ValueError) as e:
# On Linux, abstract namespace UNIX sockets start with a
# \0, which os.path doesn't like.
if not platform.isLinux():
raise e
return res
else:
def __eq__(self, other: object) -> bool:
if isinstance(other, self.__class__):
return self.name == other.name
return NotImplemented
def __repr__(self) -> str:
name = self.name
show = _coerceToFilesystemEncoding("", name) if name is not None else None
return f"UNIXAddress({show!r})"
def __hash__(self):
if self.name is None:
return hash((self.__class__, None))
try:
s1 = os.stat(self.name)
return hash((s1.st_ino, s1.st_dev))
except OSError:
return hash(self.name)
# These are for buildFactory backwards compatibility due to
# stupidity-induced inconsistency.
class _ServerFactoryIPv4Address(IPv4Address):
"""Backwards compatibility hack. Just like IPv4Address in practice."""
def __eq__(self, other: object) -> bool:
if isinstance(other, tuple):
warn(
"IPv4Address.__getitem__ is deprecated. " "Use attributes instead.",
category=DeprecationWarning,
stacklevel=2,
)
return (self.host, self.port) == other
elif isinstance(other, IPv4Address):
a = (self.type, self.host, self.port)
b = (other.type, other.host, other.port)
return a == b
return NotImplemented
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