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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef NET_DNS_DNS_SOCKET_POOL_H_ | |
| 6 #define NET_DNS_DNS_SOCKET_POOL_H_ | |
| 7 | |
| 8 #include <vector> | |
| 9 | |
| 10 #include "base/memory/scoped_ptr.h" | |
| 11 #include "net/base/net_export.h" | |
| 12 #include "net/base/net_log.h" | |
| 13 | |
| 14 namespace net { | |
| 15 | |
| 16 class ClientSocketFactory; | |
| 17 class DatagramClientSocket; | |
| 18 class IPEndPoint; | |
| 19 class NetLog; | |
| 20 class StreamSocket; | |
| 21 | |
| 22 // A DnsSocketPool is an abstraction layer around a ClientSocketFactory that | |
| 23 // allows preallocation, reuse, or other strategies to manage sockets connected | |
| 24 // to DNS servers. | |
| 25 class NET_EXPORT_PRIVATE DnsSocketPool { | |
| 26 public: | |
| 27 virtual ~DnsSocketPool() { } | |
| 28 | |
| 29 // Creates a DnsSocketPool that implements the default strategy for managing | |
| 30 // sockets. (This varies by platform; see DnsSocketPoolImpl in | |
| 31 // dns_socket_pool.cc for details.) | |
| 32 static scoped_ptr<DnsSocketPool> CreateDefault( | |
| 33 ClientSocketFactory* factory); | |
| 34 | |
| 35 // Creates a DnsSocketPool that implements a "null" strategy -- no sockets are | |
| 36 // preallocated, allocation requests are satisfied by calling the factory | |
| 37 // directly, and returned sockets are deleted immediately. | |
| 38 static scoped_ptr<DnsSocketPool> CreateNull( | |
| 39 ClientSocketFactory* factory); | |
| 40 | |
| 41 // Initializes the DnsSocketPool. |nameservers| is the list of nameservers | |
| 42 // for which the DnsSocketPool will manage sockets; |net_log| is the NetLog | |
| 43 // used when constructing sockets with the factory. | |
| 44 // | |
| 45 // Initialize may not be called more than once, and must be called before | |
| 46 // calling AllocateSocket or FreeSocket. | |
| 47 virtual void Initialize( | |
| 48 const std::vector<IPEndPoint>* nameservers, | |
| 49 NetLog* net_log) = 0; | |
| 50 | |
| 51 // Allocates a socket that is already connected to the nameserver referenced | |
| 52 // by |server_index|. May return a scoped_ptr to NULL if no sockets are | |
| 53 // available to reuse and the factory fails to produce a socket (or produces | |
| 54 // one on which Connect fails). | |
| 55 virtual scoped_ptr<DatagramClientSocket> AllocateSocket( | |
| 56 unsigned server_index) = 0; | |
| 57 | |
| 58 // Frees a socket allocated by AllocateSocket. |server_index| must be the | |
| 59 // same index passed to AllocateSocket. | |
| 60 virtual void FreeSocket( | |
| 61 unsigned server_index, | |
| 62 scoped_ptr<DatagramClientSocket> socket) = 0; | |
| 63 | |
| 64 // Creates a StreamSocket from the factory for a transaction over TCP. These | |
| 65 // sockets are not pooled. | |
| 66 scoped_ptr<StreamSocket> CreateTCPSocket( | |
| 67 unsigned server_index, | |
| 68 const NetLog::Source& source); | |
| 69 | |
| 70 protected: | |
| 71 DnsSocketPool(ClientSocketFactory* socket_factory); | |
| 72 | |
| 73 void InitializeInternal( | |
| 74 const std::vector<IPEndPoint>* nameservers, | |
| 75 NetLog* net_log); | |
| 76 | |
| 77 scoped_ptr<DatagramClientSocket> CreateConnectedSocket( | |
| 78 unsigned server_index); | |
| 79 | |
| 80 private: | |
| 81 ClientSocketFactory* socket_factory_; | |
| 82 NetLog* net_log_; | |
| 83 const std::vector<IPEndPoint>* nameservers_; | |
| 84 bool initialized_; | |
| 85 | |
| 86 DISALLOW_COPY_AND_ASSIGN(DnsSocketPool); | |
| 87 }; | |
| 88 | |
| 89 } // namespace net | |
| 90 | |
| 91 #endif // NET_DNS_DNS_SOCKET_POOL_H_ | |
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Chromium Code Reviews
Issue 992733002:
Remove //net (except for Android test stuff) and sdch (Closed)
Base URL: git@github.com:domokit/mojo.git@master