# Copyright (C) 2003-2007, 2009-2011 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.
import dns.exception
import dns.ipv4
import dns.rdata
import dns.tokenizer
class A(dns.rdata.Rdata):
"""A record.
@ivar address: an IPv4 address
@type address: string (in the standard "dotted quad" format)"""
__slots__ = ['address']
def __init__(self, rdclass, rdtype, address):
super(A, self).__init__(rdclass, rdtype)
# check that it's OK
dns.ipv4.inet_aton(address)
self.address = address
def to_text(self, origin=None, relativize=True, **kw):
return self.address
@classmethod
def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
address = tok.get_identifier()
tok.get_eol()
return cls(rdclass, rdtype, address)
def to_wire(self, file, compress=None, origin=None):
file.write(dns.ipv4.inet_aton(self.address))
@classmethod
def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
address = dns.ipv4.inet_ntoa(wire[current: current + rdlen]).decode()
return cls(rdclass, rdtype, address)
