relnote: Make QUIC version negotiation stateless. The QUIC dispatcher

net/tools/quic/quic_time_wait_list_manager.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.
 //
 // Handles packets for connection_ids in time wait state by discarding the
 // packet and sending the clients a public reset packet with exponential
 // backoff.
 
 #ifndef NET_TOOLS_QUIC_QUIC_TIME_WAIT_LIST_MANAGER_H_
 #define NET_TOOLS_QUIC_QUIC_TIME_WAIT_LIST_MANAGER_H_
@@ skipping 80 matching lines @@
   // the size is under the configured maximum.
   void TrimTimeWaitListIfNeeded();
 
   // Given a ConnectionId that exists in the time wait list, returns the
   // QuicVersion associated with it.
   QuicVersion GetQuicVersionFromConnectionId(QuicConnectionId connection_id);
 
   // The number of connections on the time-wait list.
   size_t num_connections() const { return connection_id_map_.size(); }
 
+  // Sends a version negotiation packet for |connection_id| announcing support
+  // for |supported_versions| to |client_address| from |server_address|.
+  virtual void SendVersionNegotiationPacket(
+      QuicConnectionId connection_id,
+      const QuicVersionVector& supported_versions,
+      const IPEndPoint& server_address,
+      const IPEndPoint& client_address);
+
  protected:
   virtual QuicEncryptedPacket* BuildPublicReset(
       const QuicPublicResetPacket& packet);
 
  private:
   friend class test::QuicTimeWaitListManagerPeer;
 
   // Internal structure to store pending public reset packets.
   class QueuedPacket;
 
@@ skipping 71 matching lines @@
 
   // Interface that manages blocked writers.
   QuicServerSessionVisitor* visitor_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicTimeWaitListManager);
 };
 
 }  // namespace net
 
 #endif  // NET_TOOLS_QUIC_QUIC_TIME_WAIT_LIST_MANAGER_H_