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#--
#Copyright 2007 Nominet UK
#
#Licensed under the Apache License, Version 2.0 (the "License");
#you may not use this file except in compliance with the License.
#You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
#Unless required by applicable law or agreed to in writing, software
#distributed under the License is distributed on an "AS IS" BASIS,
#WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#See the License for the specific language governing permissions and
#limitations under the License.
#++
module Dnsruby
class IPv4
# Regular expression IPv4 addresses must match
Regex = /\A(\d\d?\d?)\.(\d\d?\d?)\.(\d\d?\d?)\.(\d\d?\d?)\z/
def self.create(arg)
case arg
when IPv4
return arg
when Regex
if (0..255) === (a = $1.to_i) &&
(0..255) === (b = $2.to_i) &&
(0..255) === (c = $3.to_i) &&
(0..255) === (d = $4.to_i)
return self.new([a, b, c, d].pack("CCCC"))
else
raise ArgumentError.new("IPv4 address with invalid value: " + arg)
end
else
raise ArgumentError.new("cannot interpret as IPv4 address: #{arg.inspect}")
end
end
def initialize(address) #:nodoc:
unless address.kind_of?(String) && address.length == 4
raise ArgumentError.new('IPv4 address must be 4 bytes')
end
@address = address
end
# A String representation of the IPv4 address.
attr_reader :address
def to_s #:nodoc:
return sprintf("%d.%d.%d.%d", *@address.unpack("CCCC"))
end
def inspect #:nodoc:
return "#<#{self.class} #{self.to_s}>"
end
def to_name
return Name.create(
'%d.%d.%d.%d.in-addr.arpa.' % @address.unpack('CCCC').reverse)
end
def ==(other)
return @address == other.address
end
def eql?(other)
return self == other
end
def hash
return @address.hash
end
end
end
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