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

net/quic/crypto/quic_crypto_client_config.cc

 // Copyright 2013 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.
 
 #include "net/quic/crypto/quic_crypto_client_config.h"
 
 #include "base/metrics/sparse_histogram.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "net/quic/crypto/cert_compressor.h"
@@ skipping 685 matching lines @@
            out_params->forward_secure_premaster_secret, out_params->aead,
            out_params->client_nonce, out_params->server_nonce, hkdf_input,
            CryptoUtils::CLIENT, &out_params->forward_secure_crypters)) {
     *error_details = "Symmetric key setup failed";
     return QUIC_CRYPTO_SYMMETRIC_KEY_SETUP_FAILED;
   }
 
   return QUIC_NO_ERROR;
 }
 
+QuicErrorCode QuicCryptoClientConfig::ProcessServerConfigUpdate(
+    const CryptoHandshakeMessage& server_config_update,
+    QuicWallTime now,
+    CachedState* cached,
+    QuicCryptoNegotiatedParameters* out_params,
+    string* error_details) {
+  DCHECK(error_details != NULL);
+
+  if (server_config_update.tag() != kSCUP) {
+    *error_details = "ServerConfigUpdate must have kSCUP tag.";
+    return QUIC_INVALID_CRYPTO_MESSAGE_TYPE;
+  }
+
+  return CacheNewServerConfig(server_config_update, now, cached, out_params,
+                              error_details);
+}
+
 ProofVerifier* QuicCryptoClientConfig::proof_verifier() const {
   return proof_verifier_.get();
 }
 
 void QuicCryptoClientConfig::SetProofVerifier(ProofVerifier* verifier) {
   proof_verifier_.reset(verifier);
 }
 
 ChannelIDSource* QuicCryptoClientConfig::channel_id_source() const {
   return channel_id_source_.get();
@@ skipping 66 matching lines @@
     return;
   }
 
   // Update canonical version to point at the "most recent" entry.
   canonical_server_map_[suffix_server_id] = server_id;
 
   server_state->InitializeFrom(*canonical_state);
 }
 
 }  // namespace net