Quic use reduced PING timeout when previous connection times out with open streams

net/quic/core/quic_connection.h

 // Copyright (c) 2012 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.
 //
 // The entity that handles framing writes for a Quic client or server.
 // Each QuicSession will have a connection associated with it.
 //
 // On the server side, the Dispatcher handles the raw reads, and hands off
 // packets via ProcessUdpPacket for framing and processing.
 //
@@ skipping 465 matching lines @@
   void OnHandshakeComplete();
 
   // Accessors
   void set_visitor(QuicConnectionVisitorInterface* visitor) {
     visitor_ = visitor;
   }
   void set_debug_visitor(QuicConnectionDebugVisitor* debug_visitor) {
     debug_visitor_ = debug_visitor;
     sent_packet_manager_->SetDebugDelegate(debug_visitor);
   }
+  void set_ping_timeout(QuicTime::Delta ping_timeout) {
+    ping_timeout_ = ping_timeout;
+  }
+  const QuicTime::Delta ping_timeout() { return ping_timeout_; }
   // Used in Chromium, but not internally.
   void set_creator_debug_delegate(QuicPacketCreator::DebugDelegate* visitor) {
     packet_generator_.set_debug_delegate(visitor);
   }
   const IPEndPoint& self_address() const { return self_address_; }
   const IPEndPoint& peer_address() const { return peer_address_; }
   QuicConnectionId connection_id() const { return connection_id_; }
   const QuicClock* clock() const { return clock_; }
   QuicRandom* random_generator() const { return random_generator_; }
   QuicByteCount max_packet_length() const;
@@ skipping 476 matching lines @@
   // Indicates the retransmit alarm is going to be set by the
   // ScopedRetransmitAlarmDelayer
   bool delay_setting_retransmission_alarm_;
   // Indicates the retransmission alarm needs to be set.
   bool pending_retransmission_alarm_;
 
   // If true, defer sending data in response to received packets to the
   // SendAlarm.
   bool defer_send_in_response_to_packets_;
 
+  // The timeout for PING.
+  QuicTime::Delta ping_timeout_;
+
   // Arena to store class implementations within the QuicConnection.
   QuicConnectionArena arena_;
 
   // An alarm that fires when an ACK should be sent to the peer.
   QuicArenaScopedPtr<QuicAlarm> ack_alarm_;
   // An alarm that fires when a packet needs to be retransmitted.
   QuicArenaScopedPtr<QuicAlarm> retransmission_alarm_;
   // An alarm that is scheduled when the SentPacketManager requires a delay
   // before sending packets and fires when the packet may be sent.
   QuicArenaScopedPtr<QuicAlarm> send_alarm_;
@@ skipping 106 matching lines @@
   // Indicates whether a write error is encountered currently. This is used to
   // avoid infinite write errors.
   bool write_error_occured_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicConnection);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CONNECTION_H_