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Diffstat (limited to 'lib/ipaddress/prefix.rb')
| -rw-r--r-- | lib/ipaddress/prefix.rb | 252 |
1 files changed, 0 insertions, 252 deletions
diff --git a/lib/ipaddress/prefix.rb b/lib/ipaddress/prefix.rb deleted file mode 100644 index aac2090..0000000 --- a/lib/ipaddress/prefix.rb +++ /dev/null @@ -1,252 +0,0 @@ -module IPAddress - - # - # =NAME - # - # IPAddress::Prefix - # - # =SYNOPSIS - # - # Parent class for Prefix32 and Prefix128 - # - # =DESCRIPTION - # - # IPAddress::Prefix is the parent class for IPAddress::Prefix32 - # and IPAddress::Prefix128, defining some modules in common for - # both the subclasses. - # - # IPAddress::Prefix shouldn't be accesses directly, unless - # for particular needs. - # - class Prefix - - include Comparable - - attr_reader :prefix - - # - # Creates a new general prefix - # - def initialize(num) - @prefix = num.to_i - end - - # - # Returns a string with the prefix - # - def to_s - "#@prefix" - end - alias_method :inspect, :to_s - - # - # Returns the prefix - # - def to_i - @prefix - end - - # - # Compare the prefix - # - def <=>(oth) - @prefix <=> oth.to_i - end - - # - # Sums two prefixes or a prefix to a - # number, returns a Fixnum - # - def +(oth) - if oth.is_a? Fixnum - self.prefix + oth - else - self.prefix + oth.prefix - end - end - - # - # Returns the difference between two - # prefixes, or a prefix and a number, - # as a Fixnum - # - def -(oth) - if oth.is_a? Fixnum - self.prefix - oth - else - (self.prefix - oth.prefix).abs - end - end - - end # class Prefix - - - class Prefix32 < Prefix - - IN4MASK = 0xffffffff - - # - # Creates a new prefix object for 32 bits IPv4 addresses - # - # prefix = IPAddress::Prefix32.new 24 - # #=> 24 - # - def initialize(num) - unless (0..32).include? num - raise ArgumentError, "Prefix must be in range 0..32, got: #{num}" - end - super(num) - end - - # - # Returns the length of the host portion - # of a netmask. - # - # prefix = Prefix32.new 24 - # - # prefix.host_prefix - # #=> 8 - # - def host_prefix - 32 - @prefix - end - - # - # Transforms the prefix into a string of bits - # representing the netmask - # - # prefix = IPAddress::Prefix32.new 24 - # - # prefix.bits - # #=> "11111111111111111111111100000000" - # - def bits - "%.32b" % to_u32 - end - - # - # Gives the prefix in IPv4 dotted decimal format, - # i.e. the canonical netmask we're all used to - # - # prefix = IPAddress::Prefix32.new 24 - # - # prefix.to_ip - # #=> "255.255.255.0" - # - def to_ip - [bits].pack("B*").unpack("CCCC").join(".") - end - - # - # An array of octets of the IPv4 dotted decimal - # format - # - # prefix = IPAddress::Prefix32.new 24 - # - # prefix.octets - # #=> [255, 255, 255, 0] - # - def octets - to_ip.split(".").map{|i| i.to_i} - end - - # - # Unsigned 32 bits decimal number representing - # the prefix - # - # prefix = IPAddress::Prefix32.new 24 - # - # prefix.to_u32 - # #=> 4294967040 - # - def to_u32 - (IN4MASK >> host_prefix) << host_prefix - end - - # - # Shortcut for the octecs in the dotted decimal - # representation - # - # prefix = IPAddress::Prefix32.new 24 - # - # prefix[2] - # #=> 255 - # - def [](index) - octets[index] - end - - # - # The hostmask is the contrary of the subnet mask, - # as it shows the bits that can change within the - # hosts - # - # prefix = IPAddress::Prefix32.new 24 - # - # prefix.hostmask - # #=> "0.0.0.255" - # - def hostmask - [~to_u32].pack("N").unpack("CCCC").join(".") - end - - # - # Creates a new prefix by parsing a netmask in - # dotted decimal form - # - # prefix = IPAddress::Prefix32::parse_netmask "255.255.255.0" - # #=> 24 - # - def self.parse_netmask(netmask) - octets = netmask.split(".").map{|i| i.to_i} - num = octets.pack("C"*octets.size).unpack("B*").first.count "1" - return self.new(num) - end - - end # class Prefix32 < Prefix - - class Prefix128 < Prefix - - # - # Creates a new prefix object for 128 bits IPv6 addresses - # - # prefix = IPAddress::Prefix128.new 64 - # #=> 64 - # - def initialize(num=128) - unless (1..128).include? num.to_i - raise ArgumentError, "Prefix must be in range 1..128, got: #{num}" - end - super(num.to_i) - end - - # - # Transforms the prefix into a string of bits - # representing the netmask - # - # prefix = IPAddress::Prefix128.new 64 - # - # prefix.bits - # #=> "1111111111111111111111111111111111111111111111111111111111111111" - # "0000000000000000000000000000000000000000000000000000000000000000" - # - def bits - "1" * @prefix + "0" * (128 - @prefix) - end - - # - # Unsigned 128 bits decimal number representing - # the prefix - # - # prefix = IPAddress::Prefix128.new 64 - # - # prefix.to_u128 - # #=> 340282366920938463444927863358058659840 - # - def to_u128 - bits.to_i(2) - end - - end # class Prefix123 < Prefix - -end # module IPAddress |