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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 // A server specific QuicSession subclass. | |
| 6 | |
| 7 #ifndef NET_TOOLS_QUIC_QUIC_SERVER_SESSION_H_ | |
| 8 #define NET_TOOLS_QUIC_QUIC_SERVER_SESSION_H_ | |
| 9 | |
| 10 #include <set> | |
| 11 #include <string> | |
| 12 #include <vector> | |
| 13 | |
| 14 #include "base/basictypes.h" | |
| 15 #include "base/containers/hash_tables.h" | |
| 16 #include "base/memory/scoped_ptr.h" | |
| 17 #include "net/quic/quic_crypto_server_stream.h" | |
| 18 #include "net/quic/quic_protocol.h" | |
| 19 #include "net/quic/quic_session.h" | |
| 20 | |
| 21 namespace net { | |
| 22 | |
| 23 class QuicBlockedWriterInterface; | |
| 24 class QuicConfig; | |
| 25 class QuicConnection; | |
| 26 class QuicCryptoServerConfig; | |
| 27 class ReliableQuicStream; | |
| 28 | |
| 29 namespace tools { | |
| 30 | |
| 31 namespace test { | |
| 32 class QuicServerSessionPeer; | |
| 33 } // namespace test | |
| 34 | |
| 35 // An interface from the session to the entity owning the session. | |
| 36 // This lets the session notify its owner (the Dispatcher) when the connection | |
| 37 // is closed, blocked, or added/removed from the time-wait list. | |
| 38 class QuicServerSessionVisitor { | |
| 39 public: | |
| 40 virtual ~QuicServerSessionVisitor() {} | |
| 41 | |
| 42 virtual void OnConnectionClosed(QuicConnectionId connection_id, | |
| 43 QuicErrorCode error) = 0; | |
| 44 virtual void OnWriteBlocked(QuicBlockedWriterInterface* blocked_writer) = 0; | |
| 45 // Called after the given connection is added to the time-wait list. | |
| 46 virtual void OnConnectionAddedToTimeWaitList(QuicConnectionId connection_id) { | |
| 47 } | |
| 48 // Called after the given connection is removed from the time-wait list. | |
| 49 virtual void OnConnectionRemovedFromTimeWaitList( | |
| 50 QuicConnectionId connection_id) {} | |
| 51 }; | |
| 52 | |
| 53 class QuicServerSession : public QuicSession { | |
| 54 public: | |
| 55 QuicServerSession(const QuicConfig& config, | |
| 56 QuicConnection* connection, | |
| 57 QuicServerSessionVisitor* visitor); | |
| 58 | |
| 59 // Override the base class to notify the owner of the connection close. | |
| 60 void OnConnectionClosed(QuicErrorCode error, bool from_peer) override; | |
| 61 void OnWriteBlocked() override; | |
| 62 | |
| 63 // Sends a server config update to the client, containing new bandwidth | |
| 64 // estimate. | |
| 65 void OnCongestionWindowChange(QuicTime now) override; | |
| 66 | |
| 67 ~QuicServerSession() override; | |
| 68 | |
| 69 virtual void InitializeSession(const QuicCryptoServerConfig& crypto_config); | |
| 70 | |
| 71 const QuicCryptoServerStream* crypto_stream() const { | |
| 72 return crypto_stream_.get(); | |
| 73 } | |
| 74 | |
| 75 // Override base class to process FEC config received from client. | |
| 76 void OnConfigNegotiated() override; | |
| 77 | |
| 78 void set_serving_region(std::string serving_region) { | |
| 79 serving_region_ = serving_region; | |
| 80 } | |
| 81 | |
| 82 protected: | |
| 83 // QuicSession methods: | |
| 84 QuicDataStream* CreateIncomingDataStream(QuicStreamId id) override; | |
| 85 QuicDataStream* CreateOutgoingDataStream() override; | |
| 86 QuicCryptoServerStream* GetCryptoStream() override; | |
| 87 | |
| 88 // If we should create an incoming stream, returns true. Otherwise | |
| 89 // does error handling, including communicating the error to the client and | |
| 90 // possibly closing the connection, and returns false. | |
| 91 virtual bool ShouldCreateIncomingDataStream(QuicStreamId id); | |
| 92 | |
| 93 virtual QuicCryptoServerStream* CreateQuicCryptoServerStream( | |
| 94 const QuicCryptoServerConfig& crypto_config); | |
| 95 | |
| 96 private: | |
| 97 friend class test::QuicServerSessionPeer; | |
| 98 | |
| 99 scoped_ptr<QuicCryptoServerStream> crypto_stream_; | |
| 100 QuicServerSessionVisitor* visitor_; | |
| 101 | |
| 102 // The most recent bandwidth estimate sent to the client. | |
| 103 QuicBandwidth bandwidth_estimate_sent_to_client_; | |
| 104 | |
| 105 // Text describing server location. Sent to the client as part of the bandwith | |
| 106 // estimate in the source-address token. Optional, can be left empty. | |
| 107 std::string serving_region_; | |
| 108 | |
| 109 // Time at which we send the last SCUP to the client. | |
| 110 QuicTime last_scup_time_; | |
| 111 | |
| 112 // Number of packets sent to the peer, at the time we last sent a SCUP. | |
| 113 int64 last_scup_sequence_number_; | |
| 114 | |
| 115 DISALLOW_COPY_AND_ASSIGN(QuicServerSession); | |
| 116 }; | |
| 117 | |
| 118 } // namespace tools | |
| 119 } // namespace net | |
| 120 | |
| 121 #endif // NET_TOOLS_QUIC_QUIC_SERVER_SESSION_H_ | |
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