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Name	Size	Permission
__pycache__	[ DIR ]	drwxr-xr-x
rdtypes	[ DIR ]	drwxr-xr-x
__init__.py	1.3 KB	-rw-r--r--
_compat.py	1.28 KB	-rw-r--r--
dnssec.py	14.44 KB	-rw-r--r--
e164.py	3.07 KB	-rw-r--r--
edns.py	4.28 KB	-rw-r--r--
entropy.py	4.36 KB	-rw-r--r--
exception.py	4.52 KB	-rw-r--r--
flags.py	2.6 KB	-rw-r--r--
grange.py	1.93 KB	-rw-r--r--
hash.py	1.07 KB	-rw-r--r--
inet.py	3.17 KB	-rw-r--r--
ipv4.py	1.98 KB	-rw-r--r--
ipv6.py	5.17 KB	-rw-r--r--
message.py	42.12 KB	-rw-r--r--
name.py	28.74 KB	-rw-r--r--
namedict.py	3.59 KB	-rw-r--r--
node.py	5.91 KB	-rw-r--r--
opcode.py	2.48 KB	-rw-r--r--
query.py	19.18 KB	-rw-r--r--
rcode.py	3.03 KB	-rw-r--r--
rdata.py	14.65 KB	-rw-r--r--
rdataclass.py	3.18 KB	-rw-r--r--
rdataset.py	11.29 KB	-rw-r--r--
rdatatype.py	5.21 KB	-rw-r--r--
renderer.py	11.64 KB	-rw-r--r--
resolver.py	50.88 KB	-rw-r--r--
reversename.py	3.23 KB	-rw-r--r--
rrset.py	5.85 KB	-rw-r--r--
set.py	7.53 KB	-rw-r--r--
tokenizer.py	17.88 KB	-rw-r--r--
tsig.py	7.54 KB	-rw-r--r--
tsigkeyring.py	1.7 KB	-rw-r--r--
ttl.py	2.23 KB	-rw-r--r--
update.py	9.78 KB	-rw-r--r--
version.py	1.23 KB	-rw-r--r--
wiredata.py	3.64 KB	-rw-r--r--
zone.py	39.09 KB	-rw-r--r--

Code Editor : rdataclass.py

# Copyright (C) 2001-2007, 2009-2011 Nominum, Inc.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose with or without fee is hereby granted,
# provided that the above copyright notice and this permission notice
# appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

"""DNS Rdata Classes.

@var _by_text: The rdata class textual name to value mapping
@type _by_text: dict
@var _by_value: The rdata class value to textual name mapping
@type _by_value: dict
@var _metaclasses: If an rdataclass is a metaclass, there will be a mapping
whose key is the rdatatype value and whose value is True in this dictionary.
@type _metaclasses: dict"""

import re

import dns.exception

RESERVED0 = 0
IN = 1
CH = 3
HS = 4
NONE = 254
ANY = 255

_by_text = {
    'RESERVED0': RESERVED0,
    'IN': IN,
    'CH': CH,
    'HS': HS,
    'NONE': NONE,
    'ANY': ANY
}

# We construct the inverse mapping programmatically to ensure that we
# cannot make any mistakes (e.g. omissions, cut-and-paste errors) that
# would cause the mapping not to be true inverse.

_by_value = dict((y, x) for x, y in _by_text.items())

# Now that we've built the inverse map, we can add class aliases to
# the _by_text mapping.

_by_text.update({
    'INTERNET': IN,
    'CHAOS': CH,
    'HESIOD': HS
})

_metaclasses = {
    NONE: True,
    ANY: True
}

_unknown_class_pattern = re.compile('CLASS([0-9]+)$', re.I)

class UnknownRdataclass(dns.exception.DNSException):

"""A DNS class is unknown."""

def from_text(text):
    """Convert text into a DNS rdata class value.
    @param text: the text
    @type text: string
    @rtype: int
    @raises dns.rdataclass.UnknownRdataclass: the class is unknown
    @raises ValueError: the rdata class value is not >= 0 and <= 65535
    """

value = _by_text.get(text.upper())
    if value is None:
        match = _unknown_class_pattern.match(text)
        if match is None:
            raise UnknownRdataclass
        value = int(match.group(1))
        if value < 0 or value > 65535:
            raise ValueError("class must be between >= 0 and <= 65535")
    return value

def to_text(value):
    """Convert a DNS rdata class to text.
    @param value: the rdata class value
    @type value: int
    @rtype: string
    @raises ValueError: the rdata class value is not >= 0 and <= 65535
    """

if value < 0 or value > 65535:
        raise ValueError("class must be between >= 0 and <= 65535")
    text = _by_value.get(value)
    if text is None:
        text = 'CLASS' + repr(value)
    return text

def is_metaclass(rdclass):
    """True if the class is a metaclass.
    @param rdclass: the rdata class
    @type rdclass: int
    @rtype: bool"""

if rdclass in _metaclasses:
        return True
    return False

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Code Editor : rdataclass.py