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Edit File : rdataclass.py \| Size : 2.91 KB
# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license # Copyright (C) 2001-2017 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.""" import dns.enum import dns.exception class RdataClass(dns.enum.IntEnum): """DNS Rdata Class""" RESERVED0 = 0 IN = 1 INTERNET = IN CH = 3 CHAOS = CH HS = 4 HESIOD = HS NONE = 254 ANY = 255 @classmethod def _maximum(cls): return 65535 @classmethod def _short_name(cls): return "class" @classmethod def _prefix(cls): return "CLASS" @classmethod def _unknown_exception_class(cls): return UnknownRdataclass _metaclasses = {RdataClass.NONE, RdataClass.ANY} class UnknownRdataclass(dns.exception.DNSException): """A DNS class is unknown.""" def from_text(text: str) -> RdataClass: """Convert text into a DNS rdata class value. The input text can be a defined DNS RR class mnemonic or instance of the DNS generic class syntax. For example, "IN" and "CLASS1" will both result in a value of 1. Raises ``dns.rdatatype.UnknownRdataclass`` if the class is unknown. Raises ``ValueError`` if the rdata class value is not >= 0 and <= 65535. Returns a ``dns.rdataclass.RdataClass``. """ return RdataClass.from_text(text) def to_text(value: RdataClass) -> str: """Convert a DNS rdata class value to text. If the value has a known mnemonic, it will be used, otherwise the DNS generic class syntax will be used. Raises ``ValueError`` if the rdata class value is not >= 0 and <= 65535. Returns a ``str``. """ return RdataClass.to_text(value) def is_metaclass(rdclass: RdataClass) -> bool: """True if the specified class is a metaclass. The currently defined metaclasses are ANY and NONE. rdclass is a ``dns.rdataclass.RdataClass``. """ if rdclass in _metaclasses: return True return False ### BEGIN generated RdataClass constants RESERVED0 = RdataClass.RESERVED0 IN = RdataClass.IN INTERNET = RdataClass.INTERNET CH = RdataClass.CH CHAOS = RdataClass.CHAOS HS = RdataClass.HS HESIOD = RdataClass.HESIOD NONE = RdataClass.NONE ANY = RdataClass.ANY ### END generated RdataClass constants Back

Edit File : rdataclass.py | Size : 2.91 KB

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

# Copyright (C) 2001-2017 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."""

import dns.enum
import dns.exception

class RdataClass(dns.enum.IntEnum):
    """DNS Rdata Class"""

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

@classmethod
    def _maximum(cls):
        return 65535

@classmethod
    def _short_name(cls):
        return "class"

@classmethod
    def _prefix(cls):
        return "CLASS"

@classmethod
    def _unknown_exception_class(cls):
        return UnknownRdataclass

_metaclasses = {RdataClass.NONE, RdataClass.ANY}

class UnknownRdataclass(dns.exception.DNSException):
    """A DNS class is unknown."""

def from_text(text: str) -> RdataClass:
    """Convert text into a DNS rdata class value.

The input text can be a defined DNS RR class mnemonic or
    instance of the DNS generic class syntax.

For example, "IN" and "CLASS1" will both result in a value of 1.

Raises ``dns.rdatatype.UnknownRdataclass`` if the class is unknown.

Raises ``ValueError`` if the rdata class value is not >= 0 and <= 65535.

Returns a ``dns.rdataclass.RdataClass``.
    """

return RdataClass.from_text(text)

def to_text(value: RdataClass) -> str:
    """Convert a DNS rdata class value to text.

If the value has a known mnemonic, it will be used, otherwise the
    DNS generic class syntax will be used.

Raises ``ValueError`` if the rdata class value is not >= 0 and <= 65535.

Returns a ``str``.
    """

return RdataClass.to_text(value)

def is_metaclass(rdclass: RdataClass) -> bool:
    """True if the specified class is a metaclass.

The currently defined metaclasses are ANY and NONE.

*rdclass* is a ``dns.rdataclass.RdataClass``.
    """

if rdclass in _metaclasses:
        return True
    return False

### BEGIN generated RdataClass constants

RESERVED0 = RdataClass.RESERVED0
IN = RdataClass.IN
INTERNET = RdataClass.INTERNET
CH = RdataClass.CH
CHAOS = RdataClass.CHAOS
HS = RdataClass.HS
HESIOD = RdataClass.HESIOD
NONE = RdataClass.NONE
ANY = RdataClass.ANY

### END generated RdataClass constants

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