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Diffstat (limited to 'jni/ruby/lib/ipaddr.rb')
| -rw-r--r-- | jni/ruby/lib/ipaddr.rb | 658 |
1 files changed, 658 insertions, 0 deletions
diff --git a/jni/ruby/lib/ipaddr.rb b/jni/ruby/lib/ipaddr.rb new file mode 100644 index 0000000..06be439 --- /dev/null +++ b/jni/ruby/lib/ipaddr.rb @@ -0,0 +1,658 @@ +# +# 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 |