Unify various QUIC server classes in net/quic and net/tools/quic.

net/quic/quic_server_session.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-//
-// A server specific QuicSession subclass.
-
-#ifndef NET_QUIC_QUIC_SERVER_SESSION_H_
-#define NET_QUIC_QUIC_SERVER_SESSION_H_
-
-#include <set>
-#include <string>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/containers/hash_tables.h"
-#include "base/memory/scoped_ptr.h"
-#include "net/quic/quic_crypto_server_stream.h"
-#include "net/quic/quic_per_connection_packet_writer.h"
-#include "net/quic/quic_protocol.h"
-#include "net/quic/quic_session.h"
-
-namespace net {
-
-namespace test {
-class QuicServerSessionPeer;
-}  // namespace test
-
-class QuicBlockedWriterInterface;
-class QuicConfig;
-class QuicConnection;
-class QuicCryptoServerConfig;
-class ReliableQuicStream;
-
-// An interface from the session to the entity owning the session.
-// This lets the session notify its owner (the Dispatcher) when the connection
-// is closed, blocked, or added/removed from the time-wait list.
-class QuicServerSessionVisitor {
- public:
-  virtual ~QuicServerSessionVisitor() {}
-
-  virtual void OnConnectionClosed(QuicConnectionId connection_id,
-                                  QuicErrorCode error) = 0;
-  virtual void OnWriteBlocked(QuicBlockedWriterInterface* blocked_writer) = 0;
-  // Called after the given connection is added to the time-wait list.
-  virtual void OnConnectionAddedToTimeWaitList(QuicConnectionId connection_id) {
-  }
-  // Called after the given connection is removed from the time-wait list.
-  virtual void OnConnectionRemovedFromTimeWaitList(
-      QuicConnectionId connection_id) {}
-};
-
-class QuicServerSession : public QuicSession {
- public:
-  QuicServerSession(const QuicConfig& config,
-                    QuicConnection* connection,
-                    QuicServerSessionVisitor* visitor);
-
-  // Override the base class to notify the owner of the connection close.
-  void OnConnectionClosed(QuicErrorCode error, bool from_peer) override;
-  void OnWriteBlocked() override;
-
-  // Sends a server config update to the client, containing new bandwidth
-  // estimate.
-  void OnCongestionWindowChange(QuicTime now) override;
-
-  ~QuicServerSession() override;
-
-  virtual void InitializeSession(const QuicCryptoServerConfig* crypto_config);
-
-  const QuicCryptoServerStream* crypto_stream() const {
-    return crypto_stream_.get();
-  }
-
-  // Override base class to process FEC config received from client.
-  void OnConfigNegotiated() override;
-
-  void set_serving_region(std::string serving_region) {
-    serving_region_ = serving_region;
-  }
-
- protected:
-  // QuicSession methods:
-  QuicDataStream* CreateIncomingDataStream(QuicStreamId id) override;
-  QuicDataStream* CreateOutgoingDataStream() override;
-  QuicCryptoServerStream* GetCryptoStream() override;
-
-  // If we should create an incoming stream, returns true. Otherwise
-  // does error handling, including communicating the error to the client and
-  // possibly closing the connection, and returns false.
-  virtual bool ShouldCreateIncomingDataStream(QuicStreamId id);
-
-  virtual QuicCryptoServerStream* CreateQuicCryptoServerStream(
-      const QuicCryptoServerConfig* crypto_config);
-
- private:
-  friend class test::QuicServerSessionPeer;
-
-  scoped_ptr<QuicCryptoServerStream> crypto_stream_;
-  QuicServerSessionVisitor* visitor_;
-
-  // The most recent bandwidth estimate sent to the client.
-  QuicBandwidth bandwidth_estimate_sent_to_client_;
-
-  // Text describing server location. Sent to the client as part of the bandwith
-  // estimate in the source-address token. Optional, can be left empty.
-  std::string serving_region_;
-
-  // Time at which we send the last SCUP to the client.
-  QuicTime last_scup_time_;
-
-  // Number of packets sent to the peer, at the time we last sent a SCUP.
-  int64 last_scup_sequence_number_;
-
-  DISALLOW_COPY_AND_ASSIGN(QuicServerSession);
-};
-
-}  // namespace net
-
-#endif  // NET_QUIC_QUIC_SERVER_SESSION_H_