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#
# = IPAddress
#
# A ruby library to manipulate IPv4 and IPv6 addresses
#
#
# Package:: IPAddress
# Author:: Marco Ceresa <ceresa@ieee.org>
# License:: Ruby License
#
#--
#
#++
require 'ipaddress/ipv4'
require 'ipaddress/ipv6'
module IPAddress
NAME = "IPAddress"
GEM = "ipaddress"
AUTHORS = ["Marco Ceresa <ceresa@ieee.org>"]
#
# Parse the argument string to create a new
# IPv4, IPv6 or Mapped IP object
#
# ip = IPAddress.parse "172.16.10.1/24"
# ip6 = IPAddress.parse "2001:db8::8:800:200c:417a/64"
# ip_mapped = IPAddress.parse "::ffff:172.16.10.1/128"
#
# All the object created will be instances of the
# correct class:
#
# ip.class
# #=> IPAddress::IPv4
# ip6.class
# #=> IPAddress::IPv6
# ip_mapped.class
# #=> IPAddress::IPv6::Mapped
#
def IPAddress::parse(str)
case str
when /:.+\./
IPAddress::IPv6::Mapped.new(str)
else
IPAddress::IPv4.new(str) rescue IPAddress::IPv6.new(str)
end
end
#
# True if the object is an IPv4 address
#
# ip = IPAddress("192.168.10.100/24")
#
# ip.ipv4?
# #-> true
#
def ipv4?
self.kind_of? IPAddress::IPv4
end
#
# True if the object is an IPv6 address
#
# ip = IPAddress("192.168.10.100/24")
#
# ip.ipv6?
# #-> false
#
def ipv6?
self.kind_of? IPAddress::IPv6
end
#
# Checks if the given string is a valid IP address,
# either IPv4 or IPv6
#
# Example:
#
# IPAddress::valid? "2002::1"
# #=> true
#
# IPAddress::valid? "10.0.0.256"
# #=> false
#
def self.valid?(addr)
valid_ipv4?(addr) || valid_ipv6?(addr)
end
#
# Checks if the given string is a valid IPv4 address
#
# Example:
#
# IPAddress::valid_ipv4? "2002::1"
# #=> false
#
# IPAddress::valid_ipv4? "172.16.10.1"
# #=> true
#
def self.valid_ipv4?(addr)
if /\A(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\Z/ =~ addr
return $~.captures.all? {|i| i.to_i < 256}
end
false
end
#
# Checks if the argument is a valid IPv4 netmask
# expressed in dotted decimal format.
#
# IPAddress.valid_ipv4_netmask? "255.255.0.0"
# #=> true
#
def self.valid_ipv4_netmask?(addr)
arr = addr.split(".").map{|i| i.to_i}.pack("CCCC").unpack("B*").first.scan(/01/)
arr.empty? && valid_ipv4?(addr)
rescue
return false
end
#
# Checks if the given string is a valid IPv6 address
#
# Example:
#
# IPAddress::valid_ipv6? "2002::1"
# #=> true
#
# IPAddress::valid_ipv6? "2002::DEAD::BEEF"
# #=> false
#
def self.valid_ipv6?(addr)
# IPv6 (normal)
return true if /\A[\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*\Z/ =~ addr
return true if /\A[\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*::([\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*)?\Z/ =~ addr
return true if /\A::([\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*)?\Z/ =~ addr
# IPv6 (IPv4 compat)
return true if /\A[\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*:/ =~ addr && valid_ipv4?($')
return true if /\A[\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*::([\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*:)?/ =~ addr && valid_ipv4?($')
return true if /\A::([\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*:)?/ =~ addr && valid_ipv4?($')
false
end
#
# Deprecate method
#
def self.deprecate(message = nil) # :nodoc:
message ||= "You are using deprecated behavior which will be removed from the next major or minor release."
warn("DEPRECATION WARNING: #{message}")
end
end # module IPAddress
#
# IPAddress is a wrapper method built around
# IPAddress's library classes. Its purpouse is to
# make you indipendent from the type of IP address
# you're going to use.
#
# For example, instead of creating the three types
# of IP addresses using their own contructors
#
# ip = IPAddress::IPv4.new "172.16.10.1/24"
# ip6 = IPAddress::IPv6.new "2001:db8::8:800:200c:417a/64"
# ip_mapped = IPAddress::IPv6::Mapped "::ffff:172.16.10.1/128"
#
# you can just use the IPAddress wrapper:
#
# ip = IPAddress "172.16.10.1/24"
# ip6 = IPAddress "2001:db8::8:800:200c:417a/64"
# ip_mapped = IPAddress "::ffff:172.16.10.1/128"
#
# All the object created will be instances of the
# correct class:
#
# ip.class
# #=> IPAddress::IPv4
# ip6.class
# #=> IPAddress::IPv6
# ip_mapped.class
# #=> IPAddress::IPv6::Mapped
#
def IPAddress(str)
IPAddress::parse str
end
#
# Compatibility with Ruby 1.8
#
if RUBY_VERSION =~ /1\.8/
class Hash # :nodoc:
alias :key :index
end
class Math # :nodoc:
def Math.log2(n)
log(n) / log(2)
end
end
end
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