QUIC: if client provides an STK which includes CachedNetworkParams, then

net/quic/quic_crypto_server_stream.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_CRYPTO_SERVER_STREAM_H_
 #define NET_QUIC_QUIC_CRYPTO_SERVER_STREAM_H_
 
 #include <string>
 
 #include "net/quic/crypto/crypto_handshake.h"
@@ skipping 56 matching lines @@
   // presented a ChannelID. Otherwise it returns false.
   bool GetBase64SHA256ClientChannelID(std::string* output) const;
 
   uint8 num_handshake_messages() const { return num_handshake_messages_; }
 
   int num_server_config_update_messages_sent() const {
     return num_server_config_update_messages_sent_;
   }
 
   // Sends the latest server config and source-address token to the client.
+  // |on_handshake_complete| is true when this is called immediately after
+  // handshake completes, and should be false for subsequent updates.
   virtual void SendServerConfigUpdate(
-      const CachedNetworkParameters* cached_network_params);
+      const CachedNetworkParameters* cached_network_params,
+      bool on_handshake_complete);
 
   // Called by the ServerHello AckNotifier once the SHLO has been ACKed by the
   // client.
   void OnServerHelloAcked();
 
  protected:
   virtual QuicErrorCode ProcessClientHello(
       const CryptoHandshakeMessage& message,
       const ValidateClientHelloResultCallback::Result& result,
       CryptoHandshakeMessage* reply,
@@ skipping 37 matching lines @@
   // FinishProcessingHandshakeMessage for processing.  nullptr if no
   // handshake message is being validated.
   ValidateCallback* validate_client_hello_cb_;
 
   // Number of handshake messages received by this stream.
   uint8 num_handshake_messages_;
 
   // Number of server config update (SCUP) messages sent by this stream.
   int num_server_config_update_messages_sent_;
 
+  // If the client provides CachedNetworkParameters in the STK in the CHLO, then
+  // store here, and send back in future STKs if we have no better bandwidth
+  // estimate to send.
+  scoped_ptr<CachedNetworkParameters> previous_cached_network_params_;
+
   DISALLOW_COPY_AND_ASSIGN(QuicCryptoServerStream);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CRYPTO_SERVER_STREAM_H_