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""" DNS CLASS and QCLASS values
This module contains an Enum of CLASS and QCLASS values. The Enum also contains
a method for converting values to strings. See sections 3.2.4 and 3.2.5 of RFC
1035 for more information.
"""
class Class(object):
""" Enum of CLASS and QCLASS values
Usage:
>>> Class.IN
1
>>> Class.ANY
255
"""
# pylint: disable=invalid-name
IN = 1
CS = 2
CH = 3
HS = 4
ANY = 255
by_string = {
"IN": IN,
"CS": CS,
"CH": CH,
"HS": HS,
"*": ANY
}
by_value = dict([(y, x) for x, y in by_string.items()])
@staticmethod
def to_string(class_):
""" Convert a Class to a string
Usage:
>>> Class.to_string(Class.IN)
'IN'
"""
return Class.by_value[class_]
@staticmethod
def from_string(string):
""" Convert a string to a Class
Usage:
>>> Class.from_string('IN')
1
"""
return Class.by_string[string]
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