Do not allow a QUIC connection to timeout if no packets have been sent

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>
 #include <iterator>
@@ skipping 189 matching lines @@
       ack_alarm_(helper->CreateAlarm(new AckAlarm(this))),
       retransmission_alarm_(helper->CreateAlarm(new RetransmissionAlarm(this))),
       send_alarm_(helper->CreateAlarm(new SendAlarm(this))),
       resume_writes_alarm_(helper->CreateAlarm(new SendAlarm(this))),
       timeout_alarm_(helper->CreateAlarm(new TimeoutAlarm(this))),
       ping_alarm_(helper->CreateAlarm(new PingAlarm(this))),
       packet_generator_(connection_id_, &framer_, random_generator_, this),
       idle_network_timeout_(
           QuicTime::Delta::FromSeconds(kDefaultInitialTimeoutSecs)),
       overall_connection_timeout_(QuicTime::Delta::Infinite()),
-      time_of_last_received_packet_(clock_->ApproximateNow()),
-      time_of_last_sent_new_packet_(clock_->ApproximateNow()),
+      time_of_last_received_packet_(
+          FLAGS_quic_timeouts_require_activity
+              ? QuicTime::Zero() : clock_->ApproximateNow()),
+      time_of_last_sent_new_packet_(
+          FLAGS_quic_timeouts_require_activity
+              ? QuicTime::Zero() : clock_->ApproximateNow()),
       sequence_number_of_last_sent_packet_(0),
       sent_packet_manager_(
           is_server, clock_, &stats_,
           FLAGS_quic_use_bbr_congestion_control ? kBBR : kCubic,
           FLAGS_quic_use_time_loss_detection ? kTime : kNack),
       version_negotiation_state_(START_NEGOTIATION),
       is_server_(is_server),
       connected_(true),
       peer_ip_changed_(false),
       peer_port_changed_(false),
@@ skipping 1660 matching lines @@
   } else {
     overall_connection_timeout_ = timeout;
   }
 }
 
 bool QuicConnection::CheckForTimeout() {
   QuicTime now = clock_->ApproximateNow();
   QuicTime time_of_last_packet = max(time_of_last_received_packet_,
                                      time_of_last_sent_new_packet_);
 
+  // If no packets have been sent or recieved, then don't timeout.
+  if (FLAGS_quic_timeouts_require_activity &&
+      !time_of_last_packet.IsInitialized()) {
+    timeout_alarm_->Cancel();
+    timeout_alarm_->Set(now.Add(idle_network_timeout_));
+    return false;
+  }
+
   // |delta| can be < 0 as |now| is approximate time but |time_of_last_packet|
   // is accurate time. However, this should not change the behavior of
   // timeout handling.
   QuicTime::Delta delta = now.Subtract(time_of_last_packet);
   DVLOG(1) << ENDPOINT << "last packet "
            << time_of_last_packet.ToDebuggingValue()
            << " now:" << now.ToDebuggingValue()
            << " delta:" << delta.ToMicroseconds()
            << " network_timeout: " << idle_network_timeout_.ToMicroseconds();
   if (delta >= idle_network_timeout_) {
@@ skipping 105 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