Spaces:
Running
Running
File size: 2,984 Bytes
b72ab63 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 |
# 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
|