relnote: Allowing multipath support negotiation. Protected by --quic_enable_multipath, default valu…

net/quic/quic_config.cc

 // Copyright (c) 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/quic_config.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "net/quic/crypto/crypto_handshake_message.h"
@@ skipping 325 matching lines @@
       max_idle_time_before_crypto_handshake_(QuicTime::Delta::Zero()),
       max_undecryptable_packets_(0),
       connection_options_(kCOPT, PRESENCE_OPTIONAL),
       idle_connection_state_lifetime_seconds_(kICSL, PRESENCE_REQUIRED),
       silent_close_(kSCLS, PRESENCE_OPTIONAL),
       max_streams_per_connection_(kMSPC, PRESENCE_REQUIRED),
       bytes_for_connection_id_(kTCID, PRESENCE_OPTIONAL),
       initial_round_trip_time_us_(kIRTT, PRESENCE_OPTIONAL),
       initial_stream_flow_control_window_bytes_(kSFCW, PRESENCE_OPTIONAL),
       initial_session_flow_control_window_bytes_(kCFCW, PRESENCE_OPTIONAL),
-      socket_receive_buffer_(kSRBF, PRESENCE_OPTIONAL) {
+      socket_receive_buffer_(kSRBF, PRESENCE_OPTIONAL),
+      multipath_enabled_(kMPTH, PRESENCE_OPTIONAL) {
   SetDefaults();
 }
 
 QuicConfig::~QuicConfig() {}
 
 bool QuicConfig::SetInitialReceivedConnectionOptions(
     const QuicTagVector& tags) {
   if (HasReceivedConnectionOptions()) {
     // If we have already received connection options (via handshake or due to a
     // previous call), don't re-initialize.
@@ skipping 156 matching lines @@
 }
 
 bool QuicConfig::HasReceivedSocketReceiveBuffer() const {
   return socket_receive_buffer_.HasReceivedValue();
 }
 
 uint32_t QuicConfig::ReceivedSocketReceiveBuffer() const {
   return socket_receive_buffer_.GetReceivedValue();
 }
 
+void QuicConfig::SetMultipathEnabled(bool multipath_enabled) {
+  uint32_t value = multipath_enabled ? 1 : 0;
+  multipath_enabled_.set(value, value);
+}
+
+bool QuicConfig::MultipathEnabled() const {
+  return multipath_enabled_.GetUint32() > 0;
+}
+
 bool QuicConfig::negotiated() const {
   // TODO(ianswett): Add the negotiated parameters once and iterate over all
   // of them in negotiated, ToHandshakeMessage, ProcessClientHello, and
   // ProcessServerHello.
   return idle_connection_state_lifetime_seconds_.negotiated() &&
          max_streams_per_connection_.negotiated();
 }
 
 void QuicConfig::SetDefaults() {
   idle_connection_state_lifetime_seconds_.set(kMaximumIdleTimeoutSecs,
@@ skipping 63 matching lines @@
                                                     error_details);
   }
   if (error == QUIC_NO_ERROR) {
     error = connection_options_.ProcessPeerHello(peer_hello, hello_type,
                                                  error_details);
   }
   return error;
 }
 
 }  // namespace net