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# 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