Adds an alarm for sending a QUIC FEC packet.

net/quic/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 433 matching lines @@
   // Sends a ping, and resets the ping alarm.
   void SendPing();
 
   // Sets up a packet with an QuicAckFrame and sends it out.
   void SendAck();
 
   // Called when an RTO fires.  Resets the retransmission alarm if there are
   // remaining unacked packets.
   void OnRetransmissionTimeout();
 
+  // Called when a data packet is sent. Starts an alarm if the data sent in
+  // |sequence_number| was FEC protected.
+  void MaybeSetFecAlarm(QuicPacketSequenceNumber sequence_number);
+
   // Retransmits all unacked packets with retransmittable frames if
   // |retransmission_type| is ALL_UNACKED_PACKETS, otherwise retransmits only
   // initially encrypted packets. Used when the negotiated protocol version is
   // different from what was initially assumed and when the initial encryption
   // changes.
   void RetransmitUnackedPackets(TransmissionType retransmission_type);
 
   // Calls |sent_packet_manager_|'s NeuterUnencryptedPackets. Used when the
   // connection becomes forward secure and hasn't received acks for all packets.
   void NeuterUnencryptedPackets();
@@ skipping 310 matching lines @@
   scoped_ptr<QuicAlarm> resume_writes_alarm_;
   // An alarm that fires when the connection may have timed out.
   scoped_ptr<QuicAlarm> timeout_alarm_;
   // An alarm that fires when a ping should be sent.
   scoped_ptr<QuicAlarm> ping_alarm_;
 
   QuicConnectionVisitorInterface* visitor_;
   scoped_ptr<QuicConnectionDebugVisitor> debug_visitor_;
   QuicPacketGenerator packet_generator_;
 
+  // An alarm that fires when an FEC packet should be sent.
+  scoped_ptr<QuicAlarm> fec_alarm_;
+
   // Network idle time before we kill of this connection.
   QuicTime::Delta idle_network_timeout_;
   // Overall connection timeout.
   QuicTime::Delta overall_connection_timeout_;
 
   // Statistics for this session.
   QuicConnectionStats stats_;
 
   // The time that we got a packet for this connection.
   // This is used for timeouts, and does not indicate the packet was processed.
@@ skipping 48 matching lines @@
 
   // True if this is a secure QUIC connection.
   bool is_secure_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicConnection);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CONNECTION_H_