[331] | 1 | class IPAddr
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| 2 | # @family is either AF_INET or AF_INET6.
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| 3 | # @addr is a String represents IP address as an octet string.
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| 4 | # @mask is a String represents netmask as an octet string.
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| 5 |
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| 6 | def initialize(addr='::', family=Socket::AF_UNSPEC)
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| 7 | a, m = addr.split('/', 2)
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| 8 | if family == Socket::AF_UNSPEC
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| 9 | begin
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| 10 | @addr = IPSocket.pton(Socket::AF_INET, a)
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| 11 | @family = Socket::AF_INET
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| 12 | rescue ArgumentError
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| 13 | @addr = IPSocket.pton(Socket::AF_INET6, a)
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| 14 | @family = Socket::AF_INET6
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| 15 | end
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| 16 | else
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| 17 | @addr = IPSocket.pton(family, a)
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| 18 | @family = family
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| 19 | end
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| 20 | if m
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| 21 | initialize_makemask(m)
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| 22 | _applymask
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| 23 | else
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| 24 | if @family == Socket::AF_INET
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| 25 | @mask = "\xff" * 4
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| 26 | elsif @family == Socket::AF_INET6
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| 27 | @mask = "\xff" * 16
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| 28 | end
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| 29 | end
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| 30 | end
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| 31 |
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| 32 | def initialize_makemask(m)
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| 33 | if @family == Socket::AF_INET and m.include?('.')
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| 34 | @mask = IPSocket.pton(Socket::AF_INET, m)
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| 35 | elsif @family == Socket::AF_INET6 and m.include?(':')
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| 36 | @mask = IPSocket.pton(Socket::AF_INET6, m)
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| 37 | else
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| 38 | ma = []
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| 39 | mi = m.to_i
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| 40 | mlen = (ipv4?) ? 32 : 128
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| 41 | while mlen > 0
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| 42 | if mi >= 8
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| 43 | ma << 0xff
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| 44 | elsif mi <= 0
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| 45 | ma << 0
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| 46 | else
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| 47 | ma << (0xff ^ (0xff >> mi))
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| 48 | end
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| 49 | mi -= 8
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| 50 | mlen -= 8
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| 51 | end
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| 52 | @mask = ma.pack("C*")
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| 53 | end
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| 54 | end
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| 55 |
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| 56 | def self.new_ntoh(addr)
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| 57 | raise TypeError, "can't convert to String" unless addr.is_a? String
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| 58 | if addr.size == 4
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| 59 | a = IPAddr.new("0.0.0.0")
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| 60 | f = Socket::AF_INET
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| 61 | elsif addr.size == 16
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| 62 | a = IPAddr.new("::")
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| 63 | f = Socket::AF_INET6
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| 64 | else
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| 65 | raise ArgumentError, "length of addr must be 4 or 16"
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| 66 | end
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| 67 | a.set2(addr, f)
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| 68 | end
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| 69 |
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| 70 | # private
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| 71 | def _applymask
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| 72 | a = @addr.unpack("C*")
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| 73 | m = @mask.unpack("C*")
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| 74 | (0...a.size).each { |i| a[i] &= m[i] }
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| 75 | @addr = a.pack("C*")
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| 76 | end
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| 77 |
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| 78 | # private
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| 79 | def _mask
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| 80 | @mask
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| 81 | end
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| 82 |
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| 83 | #def &(other)
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| 84 | #def <<(num)
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| 85 |
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| 86 | def <=>(other)
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| 87 | if @family == other.family
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| 88 | @addr <=> other.hton
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| 89 | else
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| 90 | nil
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| 91 | end
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| 92 | end
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| 93 |
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| 94 | def ==(other)
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| 95 | if other.is_a? String
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| 96 | self.eql? IPAddr.new(other)
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| 97 | else
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| 98 | self.eql? other
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| 99 | end
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| 100 | end
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| 101 |
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| 102 | #def ===(ipaddr)
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| 103 | #alias include? ===
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| 104 | #def >>(num)
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| 105 |
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| 106 | def eql?(other)
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| 107 | @addr == other.hton and @mask == other._mask and @family == other.family
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| 108 | end
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| 109 |
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| 110 | def family
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| 111 | @family
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| 112 | end
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| 113 |
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| 114 | def hash
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| 115 | @addr.hash ^ @mask.hash ^ @family.hash
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| 116 | end
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| 117 |
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| 118 | def hton
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| 119 | @addr
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| 120 | end
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| 121 |
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| 122 | def inspect
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| 123 | def a2s(a)
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| 124 | if @family == Socket::AF_INET
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| 125 | return a.unpack("C*").map { |b| format("%u", b) }.join('.')
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| 126 | else
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| 127 | bytes = a.unpack("C*").map { |x| format "%02x", x }
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| 128 | return (0..7).map { |i| bytes[i*2, 2].join }.join(':')
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| 129 | end
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| 130 | end
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| 131 | format "#<%s: %s:%s/%s>",
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| 132 | self.class, (ipv4? ? 'IPv4' : 'IPv6'), a2s(@addr), a2s(@mask)
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| 133 | end
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| 134 |
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| 135 | def ipv4?
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| 136 | @family == Socket::AF_INET
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| 137 | end
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| 138 |
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| 139 | def ipv6?
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| 140 | @family == Socket::AF_INET6
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| 141 | end
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| 142 |
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| 143 | def mask(prefixlen)
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| 144 | a = @addr.unpack("C*")
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| 145 | i = prefixlen.divmod(8)[0] # mruby 1.0.0 lacks Integer#div
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| 146 | if prefixlen % 8 != 0
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| 147 | a[i] &= ~(0xff >> (prefixlen % 8))
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| 148 | i += 1
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| 149 | end
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| 150 | (i..a.size-1).each { |i| a[i] = 0 }
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| 151 | IPAddr.new('::', Socket::AF_INET6).set2(a.pack("C*"), @family)
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| 152 | end
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| 153 |
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| 154 | # private
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| 155 | def set2(a, f)
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| 156 | @addr = a
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| 157 | @family = f
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| 158 | if @family == Socket::AF_INET
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| 159 | @mask = "\xff" * 4
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| 160 | elsif @family == Socket::AF_INET6
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| 161 | @mask = "\xff" * 16
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| 162 | end
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| 163 | self
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| 164 | end
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| 165 |
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| 166 | def to_s
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| 167 | IPAddr.ntop(@addr)
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| 168 | end
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| 169 |
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| 170 | def ~
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| 171 | a = @addr.unpack("C*").map { |b| b ^ 0xff }.pack("C*")
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| 172 | IPAddr.new('::', Socket::AF_INET6).set2(a, @family)
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| 173 | end
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| 174 |
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| 175 | alias to_string to_s
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| 176 |
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| 177 | # mruby extension
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| 178 | def is_netaddr?(prefixlen)
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| 179 | (self <=> self.mask(prefixlen)) == 0
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| 180 | end
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| 181 |
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| 182 | def is_bcastaddr?(prefixlen)
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| 183 | i = ~self
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| 184 | (i <=> i.mask(prefixlen)) == 0
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| 185 | end
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| 186 | end
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