Source code for dns.rdataclass

# 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

[docs]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}
[docs]class UnknownRdataclass(dns.exception.DNSException): """A DNS class is unknown."""
[docs]def from_text(text): """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 an ``int``. """ return RdataClass.from_text(text)
[docs]def to_text(value): """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)
[docs]def is_metaclass(rdclass): """True if the specified class is a metaclass. The currently defined metaclasses are ANY and NONE. *rdclass* is an ``int``. """ 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