net/tools/quic/quic_packet_writer_wrapper.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_TOOLS_QUIC_QUIC_PACKET_WRITER_WRAPPER_H_
   6 #define NET_TOOLS_QUIC_QUIC_PACKET_WRITER_WRAPPER_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "net/quic/quic_packet_writer.h"
  10
  11 namespace net {
  12
  13 namespace tools {
  14
  15 // Wraps a writer object to allow dynamically extending functionality. Use
  16 // cases: replace writer while dispatcher and connections hold on to the
  17 // wrapper; mix in monitoring; mix in mocks in unit tests.
  18 class QuicPacketWriterWrapper : public QuicPacketWriter {
  19  public:
  20   QuicPacketWriterWrapper();
  21   explicit QuicPacketWriterWrapper(QuicPacketWriter* writer);
  22   ~QuicPacketWriterWrapper() override;
  23
  24   // Default implementation of the QuicPacketWriter interface. Passes everything
  25   // to |writer_|.
  26   WriteResult WritePacket(const char* buffer,
  27                           size_t buf_len,
  28                           const IPAddressNumber& self_address,
  29                           const IPEndPoint& peer_address) override;
  30   bool IsWriteBlockedDataBuffered() const override;
  31   bool IsWriteBlocked() const override;
  32   void SetWritable() override;
  33   QuicByteCount GetMaxPacketSize(const IPEndPoint& peer_address) const override;
  34
  35   // Takes ownership of |writer|.
  36   void set_writer(QuicPacketWriter* writer);
  37
  38  private:
  39   scoped_ptr<QuicPacketWriter> writer_;
  40
  41   DISALLOW_COPY_AND_ASSIGN(QuicPacketWriterWrapper);
  42 };
  43
  44 }  // namespace tools
  45 }  // namespace net
  46
  47 #endif  // NET_TOOLS_QUIC_QUIC_PACKET_WRITER_WRAPPER_H_