Gecko [ tsuru-no-tsurugi.tokyo ]

Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2024-09-07 23:29
rdtypes	[ DIR ]	drwxr-xr-x	2024-09-07 23:28
__init__.py	1.56 KB	-rw-r--r--	2020-10-24 23:17
_asyncbackend.py	1.53 KB	-rw-r--r--	2020-08-19 21:18
_asyncio_backend.py	4.34 KB	-rw-r--r--	2020-10-24 23:17
_curio_backend.py	3.33 KB	-rw-r--r--	2020-10-24 23:17
_immutable_attr.py	2.92 KB	-rw-r--r--	2020-10-24 23:17
_immutable_ctx.py	2.4 KB	-rw-r--r--	2020-10-24 23:17
_trio_backend.py	3.68 KB	-rw-r--r--	2020-10-24 23:17
asyncbackend.py	3 KB	-rw-r--r--	2020-10-24 23:17
asyncquery.py	17.4 KB	-rw-r--r--	2020-10-24 23:17
asyncresolver.py	8.71 KB	-rw-r--r--	2020-10-24 23:17
dnssec.py	19.19 KB	-rw-r--r--	2020-10-24 23:17
e164.py	3.6 KB	-rw-r--r--	2020-08-17 01:59
edns.py	10.72 KB	-rw-r--r--	2020-10-24 23:17
entropy.py	4.07 KB	-rw-r--r--	2020-08-17 01:59
enum.py	2.75 KB	-rw-r--r--	2020-10-24 23:17
exception.py	5.13 KB	-rw-r--r--	2020-10-24 23:17
flags.py	2.58 KB	-rw-r--r--	2020-10-24 23:17
grange.py	2.04 KB	-rw-r--r--	2020-10-24 23:17
immutable.py	1.97 KB	-rw-r--r--	2020-10-24 23:17
inet.py	4.74 KB	-rw-r--r--	2020-10-24 23:17
ipv4.py	1.93 KB	-rw-r--r--	2020-08-17 01:59
ipv6.py	5.92 KB	-rw-r--r--	2020-10-24 23:17
message.py	52.73 KB	-rw-r--r--	2021-01-05 04:29
name.py	31.54 KB	-rw-r--r--	2020-10-24 23:17
namedict.py	3.83 KB	-rw-r--r--	2020-08-17 01:59
node.py	6.42 KB	-rw-r--r--	2020-10-24 23:17
opcode.py	2.58 KB	-rw-r--r--	2021-01-05 03:22
py.typed	0 B	-rw-r--r--	2020-06-27 03:20
query.py	40.46 KB	-rw-r--r--	2020-10-24 23:17
rcode.py	3.9 KB	-rw-r--r--	2021-01-05 03:23
rdata.py	24.32 KB	-rw-r--r--	2021-01-06 03:41
rdataclass.py	2.81 KB	-rw-r--r--	2020-10-24 23:17
rdataset.py	14.54 KB	-rw-r--r--	2020-10-24 23:17
rdatatype.py	6.64 KB	-rw-r--r--	2020-10-24 23:17
renderer.py	8.59 KB	-rw-r--r--	2020-08-17 01:59
resolver.py	59.29 KB	-rw-r--r--	2020-12-29 03:07
reversename.py	3.65 KB	-rw-r--r--	2020-08-17 01:59
rrset.py	7.44 KB	-rw-r--r--	2020-10-24 23:17
serial.py	3.53 KB	-rw-r--r--	2020-08-17 01:59
set.py	7.64 KB	-rw-r--r--	2020-10-24 23:17
tokenizer.py	21.86 KB	-rw-r--r--	2020-10-24 23:17
transaction.py	16.93 KB	-rw-r--r--	2020-10-24 23:17
tsig.py	10.93 KB	-rw-r--r--	2020-10-30 22:15
tsigkeyring.py	2.43 KB	-rw-r--r--	2020-10-24 23:17
ttl.py	2.58 KB	-rw-r--r--	2020-10-24 23:17
update.py	10.55 KB	-rw-r--r--	2020-10-24 23:17
version.py	1.55 KB	-rw-r--r--	2021-01-07 18:20
versioned.py	15.91 KB	-rw-r--r--	2020-10-24 23:17
wire.py	2.48 KB	-rw-r--r--	2020-10-24 23:17
xfr.py	11.61 KB	-rw-r--r--	2020-10-24 23:17
zone.py	34.25 KB	-rw-r--r--	2020-10-24 23:17
zonefile.py	15.25 KB	-rw-r--r--	2020-10-24 23:17

Rename

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

import contextlib
import struct

import dns.exception
import dns.name

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

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

def get_bytes(self, size):
        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=1):
        length = int.from_bytes(self.get_bytes(length_size), 'big')
        return self.get_bytes(length)

def get_remaining(self):
        return self.get_bytes(self.remaining())

def get_uint8(self):
        return struct.unpack('!B', self.get_bytes(1))[0]

def get_uint16(self):
        return struct.unpack('!H', self.get_bytes(2))[0]

def get_uint32(self):
        return struct.unpack('!I', self.get_bytes(4))[0]

def get_uint48(self):
        return int.from_bytes(self.get_bytes(6), 'big')

def get_struct(self, format):
        return struct.unpack(format, self.get_bytes(struct.calcsize(format)))

def get_name(self, origin=None):
        name = dns.name.from_wire_parser(self)
        if origin:
            name = name.relativize(origin)
        return name

def seek(self, where):
        # 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):
        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):
        try:
            yield None
        finally:
            self.current = self.furthest