69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
//
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// Copyright (C) 2013 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#ifndef SHILL_IP_ADDRESS_STORE_H_
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#define SHILL_IP_ADDRESS_STORE_H_
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#include <random>
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#include <set>
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#include "shill/net/ip_address.h"
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namespace shill {
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struct IPAddressLTIgnorePrefix {
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bool operator () (const IPAddress& lhs, const IPAddress& rhs) const;
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};
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// Stores a set of IP addresses used by ConnectionHealthChecker to check
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// connectivity when there is a chance that the service has run out-of-credits.
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// The IP addresses are populated (using DNS queries) opportunistically and
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// must be persistent so that they can be used in an out-of-credit scenario
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// (when DNS queries would also fail).
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// To make the store persistent across Device resets (e.g. suspend-resume), it
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// is owned by the Manager.
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// Currently, this is a thin wrapper around an STL container.
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class IPAddressStore {
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public:
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typedef std::set<IPAddress, IPAddressLTIgnorePrefix> IPAddresses;
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IPAddressStore();
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virtual ~IPAddressStore();
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// Add a new IP address if it does not already exist.
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virtual void AddUnique(const IPAddress& ip);
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virtual void Remove(const IPAddress& ip);
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virtual void Clear();
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virtual bool Contains(const IPAddress& ip) const;
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virtual size_t Count() const;
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virtual bool Empty() const;
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const IPAddresses& GetIPAddresses() const { return ip_addresses_; }
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virtual IPAddress GetRandomIP();
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protected:
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friend class IPAddressStoreTest;
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private:
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IPAddresses ip_addresses_;
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std::default_random_engine random_engine_;
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DISALLOW_COPY_AND_ASSIGN(IPAddressStore);
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};
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} // namespace shill
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#endif // SHILL_IP_ADDRESS_STORE_H_
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