Make QuicDispatcher to queue packets for new connections while waiting for CHLOs. Flag protected by…

net/tools/quic/test_tools/packet_reordering_writer.h

+// Copyright 2013 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.
+
+#ifndef NET_TOOLS_QUIC_TEST_TOOLS_PACKET_REORDERING_WRITER_H_
+#define NET_TOOLS_QUIC_TEST_TOOLS_PACKET_REORDERING_WRITER_H_
+
+#include "net/tools/quic/quic_packet_writer_wrapper.h"
+
+namespace net {
+
+namespace test {
+
+// This packet writer allows delaying writing the next packet after
+// SetDelay(num_packets_to_wait)
+// is called and buffer this packet and write it after it writes next
+// |num_packets_to_wait| packets. It doesn't support delaying a packet while
+// there is already a packet delayed.
+class PacketReorderingWriter : public QuicPacketWriterWrapper {
+ public:
+  PacketReorderingWriter();
+
+  ~PacketReorderingWriter() override;
+
+  WriteResult WritePacket(const char* buffer,
+                          size_t buf_len,
+                          const IPAddress& self_address,
+                          const IPEndPoint& peer_address,
+                          PerPacketOptions* options) override;
+
+  void SetDelay(size_t num_packets_to_wait);
+
+ private:
+  bool delay_next_ = false;
+  size_t num_packets_to_wait_ = 0;
+  std::string delayed_data_;
+  IPAddress delayed_self_address_;
+  IPEndPoint delayed_peer_address_;
+  std::unique_ptr<PerPacketOptions> delayed_options_;
+};
+
+}  // namespace test
+}  // namespace net
+
+#endif  // NET_TOOLS_QUIC_TEST_TOOLS_PACKET_REORDERING_WRITER_H_