Only close the QUIC connection after 5RTOs on the client side when the

net/quic/core/quic_connection_test.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/core/quic_connection.h"
 
 #include <errno.h>
 #include <memory>
 #include <ostream>
 #include <utility>
@@ skipping 3536 matching lines @@
     VLOG(1) << "sending data packet";
     connection_.SendStreamDataWithString(kClientDataStreamId1, "foo", 0, !kFin,
                                          nullptr);
     connection_.GetTimeoutAlarm()->Fire();
     clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
   }
   EXPECT_FALSE(connection_.connected());
   EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
 }
 
-TEST_P(QuicConnectionTest, TimeoutAfter5RTOs) {
+TEST_P(QuicConnectionTest, TimeoutAfter5ClientRTOs) {
   connection_.SetMaxTailLossProbes(kDefaultPathId, 2);
   EXPECT_TRUE(connection_.connected());
   EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
   QuicConfig config;
   QuicTagVector connection_options;
   connection_options.push_back(k5RTO);
   config.SetConnectionOptionsToSend(connection_options);
   connection_.SetFromConfig(config);
 
   // Send stream data.
@@ skipping 12 matching lines @@
   EXPECT_EQ(4u, connection_.sent_packet_manager().GetConsecutiveRtoCount());
   // This time, we should time out.
   EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_TOO_MANY_RTOS, _,
                                            ConnectionCloseSource::FROM_SELF));
   EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
   connection_.GetRetransmissionAlarm()->Fire();
   EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
   EXPECT_FALSE(connection_.connected());
 }
 
+TEST_P(QuicConnectionTest, TimeoutAfter5ServerRTOs) {
+  FLAGS_quic_only_5rto_client_side = true;
+  connection_.SetMaxTailLossProbes(kDefaultPathId, 2);
+  QuicConnectionPeer::SetPerspective(&connection_, Perspective::IS_SERVER);
+  QuicFramerPeer::SetPerspective(QuicConnectionPeer::GetFramer(&connection_),
+                                 Perspective::IS_SERVER);
+  creator_->StopSendingVersion();
+  EXPECT_TRUE(connection_.connected());
+  EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
+  QuicConfig config;
+  QuicTagVector connection_options;
+  connection_options.push_back(k5RTO);
+  config.SetConnectionOptionsToSend(connection_options);
+  connection_.SetFromConfig(config);
+
+  // Send stream data.
+  SendStreamDataToPeer(kClientDataStreamId1, "foo", 0, kFin, nullptr);
+
+  EXPECT_CALL(visitor_, OnPathDegrading());
+  // Fire the retransmission alarm 6 times, twice for TLP and 4 times for RTO.
+  for (int i = 0; i < 6; ++i) {
+    EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
+    connection_.GetRetransmissionAlarm()->Fire();
+    EXPECT_TRUE(connection_.GetTimeoutAlarm()->IsSet());
+    EXPECT_TRUE(connection_.connected());
+  }
+
+  EXPECT_EQ(2u, connection_.sent_packet_manager().GetConsecutiveTlpCount());
+  EXPECT_EQ(4u, connection_.sent_packet_manager().GetConsecutiveRtoCount());
+  // The 5th RTO should not time out server side.
+  EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
+  connection_.GetRetransmissionAlarm()->Fire();
+  EXPECT_TRUE(connection_.GetTimeoutAlarm()->IsSet());
+  EXPECT_TRUE(connection_.connected());
+}
+
 TEST_P(QuicConnectionTest, SendScheduler) {
   // Test that if we send a packet without delay, it is not queued.
   QuicPacket* packet =
       ConstructDataPacket(kDefaultPathId, 1, !kEntropyFlag, !kHasStopWaiting);
   EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
   connection_.SendPacket(ENCRYPTION_NONE, kDefaultPathId, 1, packet,
                          kTestEntropyHash, HAS_RETRANSMITTABLE_DATA, false,
                          false);
   EXPECT_EQ(0u, connection_.NumQueuedPackets());
 }
@@ skipping 1622 matching lines @@
   connection_.SendStreamDataWithString(3, "foo", 0, !kFin, nullptr);
   EXPECT_EQ(1u, writer_->frame_count());
   EXPECT_FALSE(writer_->connection_close_frames().empty());
   // Ack frame is not bundled in connection close packet.
   EXPECT_TRUE(writer_->ack_frames().empty());
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace net