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56 lines
1.7 KiB
C++
56 lines
1.7 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_DNS_CLIENT_H_
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#define NET_DNS_DNS_CLIENT_H_
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#include <memory>
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#include "net/base/net_export.h"
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#include "net/base/rand_callback.h"
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namespace net {
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class AddressSorter;
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class ClientSocketFactory;
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struct DnsConfig;
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class DnsTransactionFactory;
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class NetLog;
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// Convenience wrapper which allows easy injection of DnsTransaction into
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// HostResolverImpl. Pointers returned by the Get* methods are only guaranteed
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// to remain valid until next time SetConfig is called.
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class NET_EXPORT DnsClient {
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public:
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virtual ~DnsClient() {}
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// Destroys the current DnsTransactionFactory and creates a new one
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// according to |config|, unless it is invalid or has |unhandled_options|.
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virtual void SetConfig(const DnsConfig& config) = 0;
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// Returns NULL if the current config is not valid.
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virtual const DnsConfig* GetConfig() const = 0;
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// Returns NULL if the current config is not valid.
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virtual DnsTransactionFactory* GetTransactionFactory() = 0;
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// Returns NULL if the current config is not valid.
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virtual AddressSorter* GetAddressSorter() = 0;
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// Creates default client.
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static std::unique_ptr<DnsClient> CreateClient(NetLog* net_log);
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// Creates a client for testing. Allows using a mock ClientSocketFactory and
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// a deterministic random number generator. |socket_factory| must outlive
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// the returned DnsClient.
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static std::unique_ptr<DnsClient> CreateClientForTesting(
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NetLog* net_log,
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ClientSocketFactory* socket_factory,
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const RandIntCallback& rand_int_callback);
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};
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} // namespace net
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#endif // NET_DNS_DNS_CLIENT_H_
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