Adding an option for peers to negotiate the length of the QUIC

net/quic/quic_connection.cc

 // 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.
 
 #include "net/quic/quic_connection.h"
 
 #include <string.h>
 #include <sys/types.h>
 
 #include <algorithm>
@@ skipping 252 matching lines @@
       SetNetworkTimeouts(QuicTime::Delta::Infinite(),
                          config.IdleConnectionStateLifetime());
     } else {
       SetNetworkTimeouts(config.max_time_before_crypto_handshake(),
                          config.max_idle_time_before_crypto_handshake());
     }
   } else {
     SetIdleNetworkTimeout(config.IdleConnectionStateLifetime());
   }
   sent_packet_manager_.SetFromConfig(config);
+  if (FLAGS_allow_truncated_connection_ids_for_quic &&
+      config.HasReceivedBytesForConnectionId()) {
+    packet_generator_.SetConnectionIdLength(
+        config.ReceivedBytesForConnectionId());
+  }
   max_undecryptable_packets_ = config.max_undecryptable_packets();
 }
 
 bool QuicConnection::SelectMutualVersion(
     const QuicVersionVector& available_versions) {
   // Try to find the highest mutual version by iterating over supported
   // versions, starting with the highest, and breaking out of the loop once we
   // find a matching version in the provided available_versions vector.
   const QuicVersionVector& supported_versions = framer_.supported_versions();
   for (size_t i = 0; i < supported_versions.size(); ++i) {
@@ skipping 1757 matching lines @@
   }
   for (size_t i = 0; i < retransmittable_frames->frames().size(); ++i) {
     if (retransmittable_frames->frames()[i].type == CONNECTION_CLOSE_FRAME) {
       return true;
     }
   }
   return false;
 }
 
 }  // namespace net