1 files changed, 73 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/share/h2o/mruby/trie_addr.rb b/web/server/h2o/libh2o/share/h2o/mruby/trie_addr.rb
new file mode 100644
index 00000000..727f2c7a
--- /dev/null
+++ b/web/server/h2o/libh2o/share/h2o/mruby/trie_addr.rb
@@ -0,0 +1,73 @@
+# Copyright (c) 2016 DeNA Co., Ltd., Ichito Nagata
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to
+# deal in the Software without restriction, including without limitation the
+# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+# sell copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+#
+class TrieAddr
+  def self.generate_leaf(default=nil)
+    leaf = Hash.new
+    leaf.default = default || leaf
+    (0..255).each {|i| leaf[i.to_s] = leaf }
+    return leaf
+  end
+  REJECT  = self.generate_leaf
+  FULFILL = self.generate_leaf(REJECT)
+
+  def initialize
+    @root = Hash.new(REJECT)
+  end
+
+  def add(cidr)
+    if cidr.kind_of?(Array)
+      cidr.each {|c| add(c) }
+      return self
+    end
+
+    ip, length = cidr.split('/', 2)
+    s = ip.split(".", 4).map {|o| o.to_i}
+    if s.length != 4
+      raise ArgumentError, "invalid IPv4 address: #{ip}"
+    end
+    length = (length || 32).to_i
+
+    netmask = ~((1 << (32 - length)) - 1) & 0xffffffff
+    nip = (s[0] << 24) + (s[1] << 16) + (s[2] << 8) + s[3]
+    nip &= netmask
+
+    cur = @root
+    while length > 8 do
+      octet = ((nip >> 24) & 0xff).to_s
+      return self if cur[octet].equal?(FULFILL)
+      if !cur[octet] || cur[octet].equal?(REJECT)
+        cur[octet] = Hash.new(REJECT)
+      end
+      cur = cur[octet]
+      nip <<= 8
+      length -= 8
+    end
+    lower = (nip >> 24) & 0xff
+    upper = lower + (1 << (8 - length)) - 1;
+    (lower..upper).each {|t| cur[t.to_s] = FULFILL }
+    return self
+  end
+
+  def match?(ip)
+    s = ip.split(".", 4)
+    @root[s[0]][s[1]][s[2]][s[3]].equal?(FULFILL)
+  end
+end