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?? ..
?? __init__.py(1.62 KB)
?? __pycache__
?? _asyncbackend.py(2.34 KB)
?? _asyncio_backend.py(8.84 KB)
?? _ddr.py(5.12 KB)
?? _features.py(2.43 KB)
?? _immutable_ctx.py(2.4 KB)
?? _trio_backend.py(8.27 KB)
?? asyncbackend.py(2.73 KB)
?? asyncquery.py(30.1 KB)
?? asyncresolver.py(17.43 KB)
?? dnssec.py(40.74 KB)
?? dnssecalgs
?? dnssectypes.py(1.76 KB)
?? e164.py(3.88 KB)
?? edns.py(16.69 KB)
?? entropy.py(4.14 KB)
?? enum.py(3.6 KB)
?? exception.py(5.81 KB)
?? flags.py(2.69 KB)
?? grange.py(2.09 KB)
?? immutable.py(1.97 KB)
?? inet.py(5.64 KB)
?? ipv4.py(2.49 KB)
?? ipv6.py(6.4 KB)
?? message.py(66.59 KB)
?? name.py(41.78 KB)
?? namedict.py(3.91 KB)
?? nameserver.py(9.88 KB)
?? node.py(12.37 KB)
?? opcode.py(2.67 KB)
?? py.typed(0 B)
?? query.py(54.98 KB)
?? quic
?? rcode.py(4.06 KB)
?? rdata.py(30.29 KB)
?? rdataclass.py(2.91 KB)
?? rdataset.py(16.27 KB)
?? rdatatype.py(7.27 KB)
?? rdtypes
?? renderer.py(10.99 KB)
?? resolver.py(72 KB)
?? reversename.py(3.74 KB)
?? rrset.py(8.96 KB)
?? serial.py(3.52 KB)
?? set.py(9 KB)
?? tokenizer.py(23.03 KB)
?? transaction.py(22.06 KB)
?? tsig.py(11.15 KB)
?? tsigkeyring.py(2.57 KB)
?? ttl.py(2.91 KB)
?? update.py(11.96 KB)
?? version.py(1.88 KB)
?? versioned.py(11.49 KB)
?? win32util.py(8.67 KB)
?? wire.py(2.76 KB)
?? xfr.py(12.96 KB)
?? zone.py(50.87 KB)
?? zonefile.py(27.27 KB)
?? zonetypes.py(690 B)

Editing: wire.py

# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license

import contextlib
import struct
from typing import Iterator, Optional, Tuple

import dns.exception
import dns.name

class Parser:
    def __init__(self, wire: bytes, current: int = 0):
        self.wire = wire
        self.current = 0
        self.end = len(self.wire)
        if current:
            self.seek(current)
        self.furthest = current

def remaining(self) -> int:
        return self.end - self.current

def get_bytes(self, size: int) -> bytes:
        assert size >= 0
        if size > self.remaining():
            raise dns.exception.FormError
        output = self.wire[self.current : self.current + size]
        self.current += size
        self.furthest = max(self.furthest, self.current)
        return output

def get_counted_bytes(self, length_size: int = 1) -> bytes:
        length = int.from_bytes(self.get_bytes(length_size), "big")
        return self.get_bytes(length)

def get_remaining(self) -> bytes:
        return self.get_bytes(self.remaining())

def get_uint8(self) -> int:
        return struct.unpack("!B", self.get_bytes(1))[0]

def get_uint16(self) -> int:
        return struct.unpack("!H", self.get_bytes(2))[0]

def get_uint32(self) -> int:
        return struct.unpack("!I", self.get_bytes(4))[0]

def get_uint48(self) -> int:
        return int.from_bytes(self.get_bytes(6), "big")

def get_struct(self, format: str) -> Tuple:
        return struct.unpack(format, self.get_bytes(struct.calcsize(format)))

def get_name(self, origin: Optional["dns.name.Name"] = None) -> "dns.name.Name":
        name = dns.name.from_wire_parser(self)
        if origin:
            name = name.relativize(origin)
        return name

def seek(self, where: int) -> None:
        # Note that seeking to the end is OK!  (If you try to read
        # after such a seek, you'll get an exception as expected.)
        if where < 0 or where > self.end:
            raise dns.exception.FormError
        self.current = where

@contextlib.contextmanager
    def restrict_to(self, size: int) -> Iterator:
        assert size >= 0
        if size > self.remaining():
            raise dns.exception.FormError
        saved_end = self.end
        try:
            self.end = self.current + size
            yield
            # We make this check here and not in the finally as we
            # don't want to raise if we're already raising for some
            # other reason.
            if self.current != self.end:
                raise dns.exception.FormError
        finally:
            self.end = saved_end

@contextlib.contextmanager
    def restore_furthest(self) -> Iterator:
        try:
            yield None
        finally:
            self.current = self.furthest

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