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authorJari Vetoniemi <jari.vetoniemi@indooratlas.com>2020-03-16 18:49:26 +0900
committerJari Vetoniemi <jari.vetoniemi@indooratlas.com>2020-03-30 00:39:06 +0900
commitfcbf63e62c627deae76c1b8cb8c0876c536ed811 (patch)
tree64cb17de3f41a2b6fef2368028fbd00349946994 /jni/ruby/lib/ipaddr.rb
Fresh start
Diffstat (limited to 'jni/ruby/lib/ipaddr.rb')
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diff --git a/jni/ruby/lib/ipaddr.rb b/jni/ruby/lib/ipaddr.rb
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+#
+# ipaddr.rb - A class to manipulate an IP address
+#
+# Copyright (c) 2002 Hajimu UMEMOTO <ume@mahoroba.org>.
+# Copyright (c) 2007, 2009, 2012 Akinori MUSHA <knu@iDaemons.org>.
+# All rights reserved.
+#
+# You can redistribute and/or modify it under the same terms as Ruby.
+#
+# $Id: ipaddr.rb 46277 2014-05-31 07:36:51Z hsbt $
+#
+# Contact:
+# - Akinori MUSHA <knu@iDaemons.org> (current maintainer)
+#
+# TODO:
+# - scope_id support
+#
+require 'socket'
+
+# IPAddr provides a set of methods to manipulate an IP address. Both IPv4 and
+# IPv6 are supported.
+#
+# == Example
+#
+# require 'ipaddr'
+#
+# ipaddr1 = IPAddr.new "3ffe:505:2::1"
+#
+# p ipaddr1 #=> #<IPAddr: IPv6:3ffe:0505:0002:0000:0000:0000:0000:0001/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff>
+#
+# p ipaddr1.to_s #=> "3ffe:505:2::1"
+#
+# ipaddr2 = ipaddr1.mask(48) #=> #<IPAddr: IPv6:3ffe:0505:0002:0000:0000:0000:0000:0000/ffff:ffff:ffff:0000:0000:0000:0000:0000>
+#
+# p ipaddr2.to_s #=> "3ffe:505:2::"
+#
+# ipaddr3 = IPAddr.new "192.168.2.0/24"
+#
+# p ipaddr3 #=> #<IPAddr: IPv4:192.168.2.0/255.255.255.0>
+
+class IPAddr
+
+ # 32 bit mask for IPv4
+ IN4MASK = 0xffffffff
+ # 128 bit mask for IPv4
+ IN6MASK = 0xffffffffffffffffffffffffffffffff
+ # Format string for IPv6
+ IN6FORMAT = (["%.4x"] * 8).join(':')
+
+ # Regexp _internally_ used for parsing IPv4 address.
+ RE_IPV4ADDRLIKE = %r{
+ \A
+ (\d+) \. (\d+) \. (\d+) \. (\d+)
+ \z
+ }x
+
+ # Regexp _internally_ used for parsing IPv6 address.
+ RE_IPV6ADDRLIKE_FULL = %r{
+ \A
+ (?:
+ (?: [\da-f]{1,4} : ){7} [\da-f]{1,4}
+ |
+ ( (?: [\da-f]{1,4} : ){6} )
+ (\d+) \. (\d+) \. (\d+) \. (\d+)
+ )
+ \z
+ }xi
+
+ # Regexp _internally_ used for parsing IPv6 address.
+ RE_IPV6ADDRLIKE_COMPRESSED = %r{
+ \A
+ ( (?: (?: [\da-f]{1,4} : )* [\da-f]{1,4} )? )
+ ::
+ ( (?:
+ ( (?: [\da-f]{1,4} : )* )
+ (?:
+ [\da-f]{1,4}
+ |
+ (\d+) \. (\d+) \. (\d+) \. (\d+)
+ )
+ )? )
+ \z
+ }xi
+
+ # Generic IPAddr related error. Exceptions raised in this class should
+ # inherit from Error.
+ class Error < ArgumentError; end
+
+ # Raised when the provided IP address is an invalid address.
+ class InvalidAddressError < Error; end
+
+ # Raised when the address family is invalid such as an address with an
+ # unsupported family, an address with an inconsistent family, or an address
+ # who's family cannot be determined.
+ class AddressFamilyError < Error; end
+
+ # Raised when the address is an invalid length.
+ class InvalidPrefixError < InvalidAddressError; end
+
+ # Returns the address family of this IP address.
+ attr_reader :family
+
+ # Creates a new ipaddr containing the given network byte ordered
+ # string form of an IP address.
+ def IPAddr::new_ntoh(addr)
+ return IPAddr.new(IPAddr::ntop(addr))
+ end
+
+ # Convert a network byte ordered string form of an IP address into
+ # human readable form.
+ def IPAddr::ntop(addr)
+ case addr.size
+ when 4
+ s = addr.unpack('C4').join('.')
+ when 16
+ s = IN6FORMAT % addr.unpack('n8')
+ else
+ raise AddressFamilyError, "unsupported address family"
+ end
+ return s
+ end
+
+ # Returns a new ipaddr built by bitwise AND.
+ def &(other)
+ return self.clone.set(@addr & coerce_other(other).to_i)
+ end
+
+ # Returns a new ipaddr built by bitwise OR.
+ def |(other)
+ return self.clone.set(@addr | coerce_other(other).to_i)
+ end
+
+ # Returns a new ipaddr built by bitwise right-shift.
+ def >>(num)
+ return self.clone.set(@addr >> num)
+ end
+
+ # Returns a new ipaddr built by bitwise left shift.
+ def <<(num)
+ return self.clone.set(addr_mask(@addr << num))
+ end
+
+ # Returns a new ipaddr built by bitwise negation.
+ def ~
+ return self.clone.set(addr_mask(~@addr))
+ end
+
+ # Returns true if two ipaddrs are equal.
+ def ==(other)
+ other = coerce_other(other)
+ return @family == other.family && @addr == other.to_i
+ end
+
+ # Returns a new ipaddr built by masking IP address with the given
+ # prefixlen/netmask. (e.g. 8, 64, "255.255.255.0", etc.)
+ def mask(prefixlen)
+ return self.clone.mask!(prefixlen)
+ end
+
+ # Returns true if the given ipaddr is in the range.
+ #
+ # e.g.:
+ # require 'ipaddr'
+ # net1 = IPAddr.new("192.168.2.0/24")
+ # net2 = IPAddr.new("192.168.2.100")
+ # net3 = IPAddr.new("192.168.3.0")
+ # p net1.include?(net2) #=> true
+ # p net1.include?(net3) #=> false
+ def include?(other)
+ other = coerce_other(other)
+ if ipv4_mapped?
+ if (@mask_addr >> 32) != 0xffffffffffffffffffffffff
+ return false
+ end
+ mask_addr = (@mask_addr & IN4MASK)
+ addr = (@addr & IN4MASK)
+ family = Socket::AF_INET
+ else
+ mask_addr = @mask_addr
+ addr = @addr
+ family = @family
+ end
+ if other.ipv4_mapped?
+ other_addr = (other.to_i & IN4MASK)
+ other_family = Socket::AF_INET
+ else
+ other_addr = other.to_i
+ other_family = other.family
+ end
+
+ if family != other_family
+ return false
+ end
+ return ((addr & mask_addr) == (other_addr & mask_addr))
+ end
+ alias === include?
+
+ # Returns the integer representation of the ipaddr.
+ def to_i
+ return @addr
+ end
+
+ # Returns a string containing the IP address representation.
+ def to_s
+ str = to_string
+ return str if ipv4?
+
+ str.gsub!(/\b0{1,3}([\da-f]+)\b/i, '\1')
+ loop do
+ break if str.sub!(/\A0:0:0:0:0:0:0:0\z/, '::')
+ break if str.sub!(/\b0:0:0:0:0:0:0\b/, ':')
+ break if str.sub!(/\b0:0:0:0:0:0\b/, ':')
+ break if str.sub!(/\b0:0:0:0:0\b/, ':')
+ break if str.sub!(/\b0:0:0:0\b/, ':')
+ break if str.sub!(/\b0:0:0\b/, ':')
+ break if str.sub!(/\b0:0\b/, ':')
+ break
+ end
+ str.sub!(/:{3,}/, '::')
+
+ if /\A::(ffff:)?([\da-f]{1,4}):([\da-f]{1,4})\z/i =~ str
+ str = sprintf('::%s%d.%d.%d.%d', $1, $2.hex / 256, $2.hex % 256, $3.hex / 256, $3.hex % 256)
+ end
+
+ str
+ end
+
+ # Returns a string containing the IP address representation in
+ # canonical form.
+ def to_string
+ return _to_string(@addr)
+ end
+
+ # Returns a network byte ordered string form of the IP address.
+ def hton
+ case @family
+ when Socket::AF_INET
+ return [@addr].pack('N')
+ when Socket::AF_INET6
+ return (0..7).map { |i|
+ (@addr >> (112 - 16 * i)) & 0xffff
+ }.pack('n8')
+ else
+ raise AddressFamilyError, "unsupported address family"
+ end
+ end
+
+ # Returns true if the ipaddr is an IPv4 address.
+ def ipv4?
+ return @family == Socket::AF_INET
+ end
+
+ # Returns true if the ipaddr is an IPv6 address.
+ def ipv6?
+ return @family == Socket::AF_INET6
+ end
+
+ # Returns true if the ipaddr is an IPv4-mapped IPv6 address.
+ def ipv4_mapped?
+ return ipv6? && (@addr >> 32) == 0xffff
+ end
+
+ # Returns true if the ipaddr is an IPv4-compatible IPv6 address.
+ def ipv4_compat?
+ if !ipv6? || (@addr >> 32) != 0
+ return false
+ end
+ a = (@addr & IN4MASK)
+ return a != 0 && a != 1
+ end
+
+ # Returns a new ipaddr built by converting the native IPv4 address
+ # into an IPv4-mapped IPv6 address.
+ def ipv4_mapped
+ if !ipv4?
+ raise InvalidAddressError, "not an IPv4 address"
+ end
+ return self.clone.set(@addr | 0xffff00000000, Socket::AF_INET6)
+ end
+
+ # Returns a new ipaddr built by converting the native IPv4 address
+ # into an IPv4-compatible IPv6 address.
+ def ipv4_compat
+ if !ipv4?
+ raise InvalidAddressError, "not an IPv4 address"
+ end
+ return self.clone.set(@addr, Socket::AF_INET6)
+ end
+
+ # Returns a new ipaddr built by converting the IPv6 address into a
+ # native IPv4 address. If the IP address is not an IPv4-mapped or
+ # IPv4-compatible IPv6 address, returns self.
+ def native
+ if !ipv4_mapped? && !ipv4_compat?
+ return self
+ end
+ return self.clone.set(@addr & IN4MASK, Socket::AF_INET)
+ end
+
+ # Returns a string for DNS reverse lookup. It returns a string in
+ # RFC3172 form for an IPv6 address.
+ def reverse
+ case @family
+ when Socket::AF_INET
+ return _reverse + ".in-addr.arpa"
+ when Socket::AF_INET6
+ return ip6_arpa
+ else
+ raise AddressFamilyError, "unsupported address family"
+ end
+ end
+
+ # Returns a string for DNS reverse lookup compatible with RFC3172.
+ def ip6_arpa
+ if !ipv6?
+ raise InvalidAddressError, "not an IPv6 address"
+ end
+ return _reverse + ".ip6.arpa"
+ end
+
+ # Returns a string for DNS reverse lookup compatible with RFC1886.
+ def ip6_int
+ if !ipv6?
+ raise InvalidAddressError, "not an IPv6 address"
+ end
+ return _reverse + ".ip6.int"
+ end
+
+ # Returns the successor to the ipaddr.
+ def succ
+ return self.clone.set(@addr + 1, @family)
+ end
+
+ # Compares the ipaddr with another.
+ def <=>(other)
+ other = coerce_other(other)
+
+ return nil if other.family != @family
+
+ return @addr <=> other.to_i
+ end
+ include Comparable
+
+ # Checks equality used by Hash.
+ def eql?(other)
+ return self.class == other.class && self.hash == other.hash && self == other
+ end
+
+ # Returns a hash value used by Hash, Set, and Array classes
+ def hash
+ return ([@addr, @mask_addr].hash << 1) | (ipv4? ? 0 : 1)
+ end
+
+ # Creates a Range object for the network address.
+ def to_range
+ begin_addr = (@addr & @mask_addr)
+
+ case @family
+ when Socket::AF_INET
+ end_addr = (@addr | (IN4MASK ^ @mask_addr))
+ when Socket::AF_INET6
+ end_addr = (@addr | (IN6MASK ^ @mask_addr))
+ else
+ raise AddressFamilyError, "unsupported address family"
+ end
+
+ return clone.set(begin_addr, @family)..clone.set(end_addr, @family)
+ end
+
+ # Returns a string containing a human-readable representation of the
+ # ipaddr. ("#<IPAddr: family:address/mask>")
+ def inspect
+ case @family
+ when Socket::AF_INET
+ af = "IPv4"
+ when Socket::AF_INET6
+ af = "IPv6"
+ else
+ raise AddressFamilyError, "unsupported address family"
+ end
+ return sprintf("#<%s: %s:%s/%s>", self.class.name,
+ af, _to_string(@addr), _to_string(@mask_addr))
+ end
+
+ protected
+
+ # Set +@addr+, the internal stored ip address, to given +addr+. The
+ # parameter +addr+ is validated using the first +family+ member,
+ # which is +Socket::AF_INET+ or +Socket::AF_INET6+.
+ def set(addr, *family)
+ case family[0] ? family[0] : @family
+ when Socket::AF_INET
+ if addr < 0 || addr > IN4MASK
+ raise InvalidAddressError, "invalid address"
+ end
+ when Socket::AF_INET6
+ if addr < 0 || addr > IN6MASK
+ raise InvalidAddressError, "invalid address"
+ end
+ else
+ raise AddressFamilyError, "unsupported address family"
+ end
+ @addr = addr
+ if family[0]
+ @family = family[0]
+ end
+ return self
+ end
+
+ # Set current netmask to given mask.
+ def mask!(mask)
+ if mask.kind_of?(String)
+ if mask =~ /^\d+$/
+ prefixlen = mask.to_i
+ else
+ m = IPAddr.new(mask)
+ if m.family != @family
+ raise InvalidPrefixError, "address family is not same"
+ end
+ @mask_addr = m.to_i
+ @addr &= @mask_addr
+ return self
+ end
+ else
+ prefixlen = mask
+ end
+ case @family
+ when Socket::AF_INET
+ if prefixlen < 0 || prefixlen > 32
+ raise InvalidPrefixError, "invalid length"
+ end
+ masklen = 32 - prefixlen
+ @mask_addr = ((IN4MASK >> masklen) << masklen)
+ when Socket::AF_INET6
+ if prefixlen < 0 || prefixlen > 128
+ raise InvalidPrefixError, "invalid length"
+ end
+ masklen = 128 - prefixlen
+ @mask_addr = ((IN6MASK >> masklen) << masklen)
+ else
+ raise AddressFamilyError, "unsupported address family"
+ end
+ @addr = ((@addr >> masklen) << masklen)
+ return self
+ end
+
+ private
+
+ # Creates a new ipaddr object either from a human readable IP
+ # address representation in string, or from a packed in_addr value
+ # followed by an address family.
+ #
+ # In the former case, the following are the valid formats that will
+ # be recognized: "address", "address/prefixlen" and "address/mask",
+ # where IPv6 address may be enclosed in square brackets (`[' and
+ # `]'). If a prefixlen or a mask is specified, it returns a masked
+ # IP address. Although the address family is determined
+ # automatically from a specified string, you can specify one
+ # explicitly by the optional second argument.
+ #
+ # Otherwise an IP address is generated from a packed in_addr value
+ # and an address family.
+ #
+ # The IPAddr class defines many methods and operators, and some of
+ # those, such as &, |, include? and ==, accept a string, or a packed
+ # in_addr value instead of an IPAddr object.
+ def initialize(addr = '::', family = Socket::AF_UNSPEC)
+ if !addr.kind_of?(String)
+ case family
+ when Socket::AF_INET, Socket::AF_INET6
+ set(addr.to_i, family)
+ @mask_addr = (family == Socket::AF_INET) ? IN4MASK : IN6MASK
+ return
+ when Socket::AF_UNSPEC
+ raise AddressFamilyError, "address family must be specified"
+ else
+ raise AddressFamilyError, "unsupported address family: #{family}"
+ end
+ end
+ prefix, prefixlen = addr.split('/')
+ if prefix =~ /^\[(.*)\]$/i
+ prefix = $1
+ family = Socket::AF_INET6
+ end
+ # It seems AI_NUMERICHOST doesn't do the job.
+ #Socket.getaddrinfo(left, nil, Socket::AF_INET6, Socket::SOCK_STREAM, nil,
+ # Socket::AI_NUMERICHOST)
+ @addr = @family = nil
+ if family == Socket::AF_UNSPEC || family == Socket::AF_INET
+ @addr = in_addr(prefix)
+ if @addr
+ @family = Socket::AF_INET
+ end
+ end
+ if !@addr && (family == Socket::AF_UNSPEC || family == Socket::AF_INET6)
+ @addr = in6_addr(prefix)
+ @family = Socket::AF_INET6
+ end
+ if family != Socket::AF_UNSPEC && @family != family
+ raise AddressFamilyError, "address family mismatch"
+ end
+ if prefixlen
+ mask!(prefixlen)
+ else
+ @mask_addr = (@family == Socket::AF_INET) ? IN4MASK : IN6MASK
+ end
+ end
+
+ def coerce_other(other)
+ case other
+ when IPAddr
+ other
+ when String
+ self.class.new(other)
+ else
+ self.class.new(other, @family)
+ end
+ end
+
+ def in_addr(addr)
+ case addr
+ when Array
+ octets = addr
+ else
+ m = RE_IPV4ADDRLIKE.match(addr) or return nil
+ octets = m.captures
+ end
+ octets.inject(0) { |i, s|
+ (n = s.to_i) < 256 or raise InvalidAddressError, "invalid address"
+ s.match(/\A0./) and raise InvalidAddressError, "zero-filled number in IPv4 address is ambiguous"
+ i << 8 | n
+ }
+ end
+
+ def in6_addr(left)
+ case left
+ when RE_IPV6ADDRLIKE_FULL
+ if $2
+ addr = in_addr($~[2,4])
+ left = $1 + ':'
+ else
+ addr = 0
+ end
+ right = ''
+ when RE_IPV6ADDRLIKE_COMPRESSED
+ if $4
+ left.count(':') <= 6 or raise InvalidAddressError, "invalid address"
+ addr = in_addr($~[4,4])
+ left = $1
+ right = $3 + '0:0'
+ else
+ left.count(':') <= ($1.empty? || $2.empty? ? 8 : 7) or
+ raise InvalidAddressError, "invalid address"
+ left = $1
+ right = $2
+ addr = 0
+ end
+ else
+ raise InvalidAddressError, "invalid address"
+ end
+ l = left.split(':')
+ r = right.split(':')
+ rest = 8 - l.size - r.size
+ if rest < 0
+ return nil
+ end
+ (l + Array.new(rest, '0') + r).inject(0) { |i, s|
+ i << 16 | s.hex
+ } | addr
+ end
+
+ def addr_mask(addr)
+ case @family
+ when Socket::AF_INET
+ return addr & IN4MASK
+ when Socket::AF_INET6
+ return addr & IN6MASK
+ else
+ raise AddressFamilyError, "unsupported address family"
+ end
+ end
+
+ def _reverse
+ case @family
+ when Socket::AF_INET
+ return (0..3).map { |i|
+ (@addr >> (8 * i)) & 0xff
+ }.join('.')
+ when Socket::AF_INET6
+ return ("%.32x" % @addr).reverse!.gsub!(/.(?!$)/, '\&.')
+ else
+ raise AddressFamilyError, "unsupported address family"
+ end
+ end
+
+ def _to_string(addr)
+ case @family
+ when Socket::AF_INET
+ return (0..3).map { |i|
+ (addr >> (24 - 8 * i)) & 0xff
+ }.join('.')
+ when Socket::AF_INET6
+ return (("%.32x" % addr).gsub!(/.{4}(?!$)/, '\&:'))
+ else
+ raise AddressFamilyError, "unsupported address family"
+ end
+ end
+
+end
+
+unless Socket.const_defined? :AF_INET6
+ class Socket < BasicSocket
+ # IPv6 protocol family
+ AF_INET6 = Object.new
+ end
+
+ class << IPSocket
+ private
+
+ def valid_v6?(addr)
+ case addr
+ when IPAddr::RE_IPV6ADDRLIKE_FULL
+ if $2
+ $~[2,4].all? {|i| i.to_i < 256 }
+ else
+ true
+ end
+ when IPAddr::RE_IPV6ADDRLIKE_COMPRESSED
+ if $4
+ addr.count(':') <= 6 && $~[4,4].all? {|i| i.to_i < 256}
+ else
+ addr.count(':') <= 7
+ end
+ else
+ false
+ end
+ end
+
+ alias getaddress_orig getaddress
+
+ public
+
+ # Returns a +String+ based representation of a valid DNS hostname,
+ # IPv4 or IPv6 address.
+ #
+ # IPSocket.getaddress 'localhost' #=> "::1"
+ # IPSocket.getaddress 'broadcasthost' #=> "255.255.255.255"
+ # IPSocket.getaddress 'www.ruby-lang.org' #=> "221.186.184.68"
+ # IPSocket.getaddress 'www.ccc.de' #=> "2a00:1328:e102:ccc0::122"
+ def getaddress(s)
+ if valid_v6?(s)
+ s
+ else
+ getaddress_orig(s)
+ end
+ end
+ end
+end