jpayne@69: 
jpayne@69: // Copyright (c) 2013-2014 Sandstorm Development Group, Inc. and contributors
jpayne@69: // Licensed under the MIT License:
jpayne@69: //
jpayne@69: // Permission is hereby granted, free of charge, to any person obtaining a copy
jpayne@69: // of this software and associated documentation files (the "Software"), to deal
jpayne@69: // in the Software without restriction, including without limitation the rights
jpayne@69: // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
jpayne@69: // copies of the Software, and to permit persons to whom the Software is
jpayne@69: // furnished to do so, subject to the following conditions:
jpayne@69: //
jpayne@69: // The above copyright notice and this permission notice shall be included in
jpayne@69: // all copies or substantial portions of the Software.
jpayne@69: //
jpayne@69: // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
jpayne@69: // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
jpayne@69: // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
jpayne@69: // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
jpayne@69: // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
jpayne@69: // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
jpayne@69: // THE SOFTWARE.
jpayne@69: 
jpayne@69: #pragma once
jpayne@69: 
jpayne@69: #include "common.h"
jpayne@69: #include <cstdint>
jpayne@69: 
jpayne@69: KJ_BEGIN_HEADER
jpayne@69: 
jpayne@69: struct sockaddr;
jpayne@69: 
jpayne@69: namespace kj {
jpayne@69: 
jpayne@69: class CidrRange {
jpayne@69: public:
jpayne@69:   CidrRange(StringPtr pattern);
jpayne@69: 
jpayne@69:   static CidrRange inet4(ArrayPtr<const byte> bits, uint bitCount);
jpayne@69:   static CidrRange inet6(ArrayPtr<const uint16_t> prefix, ArrayPtr<const uint16_t> suffix,
jpayne@69:                          uint bitCount);
jpayne@69:   // Zeros are inserted between `prefix` and `suffix` to extend the address to 128 bits.
jpayne@69: 
jpayne@69:   uint getSpecificity() const { return bitCount; }
jpayne@69: 
jpayne@69:   bool matches(const struct sockaddr* addr) const;
jpayne@69:   bool matchesFamily(int family) const;
jpayne@69: 
jpayne@69:   String toString() const;
jpayne@69: 
jpayne@69: private:
jpayne@69:   int family;
jpayne@69:   byte bits[16];
jpayne@69:   uint bitCount;    // how many bits in `bits` need to match
jpayne@69: 
jpayne@69:   CidrRange(int family, ArrayPtr<const byte> bits, uint bitCount);
jpayne@69: 
jpayne@69:   void zeroIrrelevantBits();
jpayne@69: };
jpayne@69: 
jpayne@69: }  // namespace kj
jpayne@69: 
jpayne@69: KJ_END_HEADER