net/quic/quic_per_connection_packet_writer.h

   1 // Copyright 2014 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_QUIC_QUIC_PER_CONNECTION_PACKET_WRITER_H_
   6 #define NET_QUIC_QUIC_PER_CONNECTION_PACKET_WRITER_H_
   7
   8 #include "base/memory/weak_ptr.h"
   9 #include "net/quic/quic_connection.h"
  10 #include "net/quic/quic_packet_writer.h"
  11
  12 namespace net {
  13
  14 class QuicServerPacketWriter;
  15
  16 // A connection-specific packet writer that notifies its connection when its
  17 // writes to the shared QuicServerPacketWriter complete.
  18 // This class is necessary because multiple connections can share the same
  19 // QuicServerPacketWriter, so it has no way to know which connection to notify.
  20 class QuicPerConnectionPacketWriter : public QuicPacketWriter {
  21  public:
  22   // Does not take ownership of |shared_writer| or |connection|.
  23   QuicPerConnectionPacketWriter(QuicServerPacketWriter* shared_writer,
  24                                 QuicConnection* connection);
  25   ~QuicPerConnectionPacketWriter() override;
  26
  27   QuicPacketWriter* shared_writer() const;
  28   QuicConnection* connection() const { return connection_; }
  29
  30   // Default implementation of the QuicPacketWriter interface: Passes everything
  31   // to |shared_writer_|.
  32   WriteResult WritePacket(const char* buffer,
  33                           size_t buf_len,
  34                           const IPAddressNumber& self_address,
  35                           const IPEndPoint& peer_address) override;
  36   bool IsWriteBlockedDataBuffered() const override;
  37   bool IsWriteBlocked() const override;
  38   void SetWritable() override;
  39
  40  private:
  41   void OnWriteComplete(WriteResult result);
  42
  43   QuicServerPacketWriter* shared_writer_;  // Not owned.
  44   QuicConnection* connection_;  // Not owned.
  45
  46   base::WeakPtrFactory<QuicPerConnectionPacketWriter> weak_factory_;
  47
  48   DISALLOW_COPY_AND_ASSIGN(QuicPerConnectionPacketWriter);
  49 };
  50
  51 }  // namespace net
  52
  53 #endif  // NET_QUIC_QUIC_PER_CONNECTION_PACKET_WRITER_H_