relnote: Add varz peer_ip_changes and successful_peer_ip_migrations (no

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 640 matching lines @@
   // cannot be written immediately.
   virtual void SendOrQueuePacket(QueuedPacket packet);
 
   QuicConnectionHelperInterface* helper() { return helper_; }
 
   // Selects and updates the version of the protocol being used by selecting a
   // version from |available_versions| which is also supported. Returns true if
   // such a version exists, false otherwise.
   bool SelectMutualVersion(const QuicVersionVector& available_versions);
 
+  bool peer_ip_changed() const { return peer_ip_changed_; }
+
   bool peer_port_changed() const { return peer_port_changed_; }
 
  private:
   friend class test::QuicConnectionPeer;
   friend class test::PacketSavingConnection;
 
   typedef std::list<QueuedPacket> QueuedPacketList;
   typedef std::map<QuicFecGroupNumber, QuicFecGroup*> FecGroupMap;
 
   // Writes the given packet to socket, encrypted with packet's
@@ skipping 113 matching lines @@
   QuicPacketNumber first_required_forward_secure_packet_;
   const QuicClock* clock_;
   QuicRandom* random_generator_;
 
   const QuicConnectionId connection_id_;
   // Address on the last successfully processed packet received from the
   // client.
   IPEndPoint self_address_;
   IPEndPoint peer_address_;
 
-  // TODO(fayang): Use migrating_peer_address_ instead of migrating_peer_ip_
-  // and migrating_peer_port_ once FLAGS_quic_allow_ip_migration is deprecated.
   // Used to store latest peer IP address for IP address migration.
   IPAddressNumber migrating_peer_ip_;
   // Used to store latest peer port to possibly migrate to later.
   uint16 migrating_peer_port_;
 
   // True if the last packet has gotten far enough in the framer to be
   // decrypted.
   bool last_packet_decrypted_;
   bool last_packet_revived_;  // True if the last packet was revived from FEC.
   QuicByteCount last_size_;  // Size of the last received packet.
@@ skipping 115 matching lines @@
   QuicVersionNegotiationState version_negotiation_state_;
 
   // Tracks if the connection was created by the server or the client.
   Perspective perspective_;
 
   // True by default.  False if we've received or sent an explicit connection
   // close.
   bool connected_;
 
   // Set to true if the UDP packet headers have a new IP address for the peer.
-  // If true, do not perform connection migration.
   bool peer_ip_changed_;
 
   // Set to true if the UDP packet headers have a new port for the peer.
-  // If true, and the IP has not changed, then we can migrate the connection.
   bool peer_port_changed_;
 
   // Set to true if the UDP packet headers are addressed to a different IP.
   // We do not support connection migration when the self IP changed.
   bool self_ip_changed_;
 
   // Set to true if the UDP packet headers are addressed to a different port.
   // We do not support connection migration when the self port changed.
   bool self_port_changed_;
 
@@ skipping 29 matching lines @@
 
   // Whether a GoAway has been received.
   bool goaway_received_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicConnection);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CONNECTION_H_