Allow QUIC clients to accept STK/SCFG updates on an existing connection.

net/quic/quic_protocol.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.
 
 #ifndef NET_QUIC_QUIC_PROTOCOL_H_
 #define NET_QUIC_QUIC_PROTOCOL_H_
 
 #include <stddef.h>
 #include <limits>
 #include <map>
@@ skipping 510 matching lines @@
   // A crypto message was received with the wrong encryption level (i.e. it
   // should have been encrypted but was not.)
   QUIC_CRYPTO_ENCRYPTION_LEVEL_INCORRECT = 44,
   // The server config for a server has expired.
   QUIC_CRYPTO_SERVER_CONFIG_EXPIRED = 45,
   // We failed to setup the symmetric keys for a connection.
   QUIC_CRYPTO_SYMMETRIC_KEY_SETUP_FAILED = 53,
   // A handshake message arrived, but we are still validating the
   // previous handshake message.
   QUIC_CRYPTO_MESSAGE_WHILE_VALIDATING_CLIENT_HELLO = 54,
+  // A server config update arrived before the handshake is complete.
+  QUIC_CRYPTO_UPDATE_BEFORE_HANDSHAKE_COMPLETE = 65,
   // This connection involved a version negotiation which appears to have been
   // tampered with.
   QUIC_VERSION_NEGOTIATION_MISMATCH = 55,
 
   // No error. Used as bound while iterating.
-  QUIC_LAST_ERROR = 65,
+  QUIC_LAST_ERROR = 66,
 };
 
 struct NET_EXPORT_PRIVATE QuicPacketPublicHeader {
   QuicPacketPublicHeader();
   explicit QuicPacketPublicHeader(const QuicPacketPublicHeader& other);
   ~QuicPacketPublicHeader();
 
   // Universal header. All QuicPacket headers will have a connection_id and
   // public flags.
   QuicConnectionId connection_id;
@@ skipping 518 matching lines @@
   // Stores the sequence numbers of all transmissions of this packet.
   // Can never be null.
   SequenceNumberSet* all_transmissions;
   // In flight packets have not been abandoned or lost.
   bool in_flight;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_PROTOCOL_H_