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47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_DNS_ADDRESS_SORTER_H_
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#define NET_DNS_ADDRESS_SORTER_H_
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#include <memory>
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#include "base/callback.h"
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#include "base/macros.h"
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#include "net/base/net_export.h"
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namespace net {
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class AddressList;
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// Sorts AddressList according to RFC3484, by likelihood of successful
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// connection. Depending on the platform, the sort could be performed
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// asynchronously by the OS, or synchronously by local implementation.
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// AddressSorter does not necessarily preserve port numbers on the sorted list.
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class NET_EXPORT AddressSorter {
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public:
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using CallbackType =
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base::OnceCallback<void(bool success, const AddressList& list)>;
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virtual ~AddressSorter() {}
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// Sorts |list|, which must include at least one IPv6 address.
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// Calls |callback| upon completion. Could complete synchronously. Could
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// complete after this AddressSorter is destroyed.
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virtual void Sort(const AddressList& list, CallbackType callback) const = 0;
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// Creates platform-dependent AddressSorter.
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static std::unique_ptr<AddressSorter> CreateAddressSorter();
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protected:
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AddressSorter() {}
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private:
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DISALLOW_COPY_AND_ASSIGN(AddressSorter);
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};
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} // namespace net
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#endif // NET_DNS_ADDRESS_SORTER_H_
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