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// Copyright (c) 2018 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/test_tools/simple_session_notifier.h"
#include "net/quic/platform/api/quic_test.h"
#include "net/quic/test_tools/quic_connection_peer.h"
#include "net/quic/test_tools/quic_test_utils.h"
using testing::_;
using testing::InSequence;
using testing::Return;
using testing::StrictMock;
namespace net {
namespace test {
namespace {
class MockQuicConnectionWithSendStreamData : public MockQuicConnection {
public:
MockQuicConnectionWithSendStreamData(MockQuicConnectionHelper* helper,
MockAlarmFactory* alarm_factory,
Perspective perspective)
: MockQuicConnection(helper, alarm_factory, perspective) {}
MOCK_METHOD4(SendStreamData,
QuicConsumedData(QuicStreamId id,
size_t write_length,
QuicStreamOffset offset,
StreamSendingState state));
static QuicConsumedData ConsumeAllData(QuicStreamId /*id*/,
size_t write_length,
QuicStreamOffset /*offset*/,
StreamSendingState state) {
return QuicConsumedData(write_length, state != NO_FIN);
}
};
class SimpleSessionNotifierTest : public QuicTest {
public:
SimpleSessionNotifierTest()
: connection_(&helper_, &alarm_factory_, Perspective::IS_CLIENT),
notifier_(&connection_) {
connection_.set_visitor(&visitor_);
QuicConnectionPeer::SetSessionDecidesWhatToWrite(&connection_);
EXPECT_FALSE(notifier_.WillingToWrite());
EXPECT_EQ(0u, notifier_.StreamBytesSent());
EXPECT_FALSE(notifier_.HasBufferedStreamData());
}
bool ControlFrameConsumed(const QuicFrame& frame) {
DeleteFrame(&const_cast<QuicFrame&>(frame));
return true;
}
MockQuicConnectionHelper helper_;
MockAlarmFactory alarm_factory_;
MockQuicConnectionVisitor visitor_;
StrictMock<MockQuicConnectionWithSendStreamData> connection_;
SimpleSessionNotifier notifier_;
};
TEST_F(SimpleSessionNotifierTest, WriteOrBufferData) {
InSequence s;
EXPECT_CALL(connection_, SendStreamData(3, 1024, 0, NO_FIN))
.WillOnce(Return(QuicConsumedData(1024, false)));
notifier_.WriteOrBufferData(3, 1024, NO_FIN);
EXPECT_EQ(0u, notifier_.StreamBytesToSend());
EXPECT_CALL(connection_, SendStreamData(5, 512, 0, NO_FIN))
.WillOnce(Return(QuicConsumedData(512, false)));
notifier_.WriteOrBufferData(5, 512, NO_FIN);
EXPECT_FALSE(notifier_.WillingToWrite());
// Connection is blocked.
EXPECT_CALL(connection_, SendStreamData(5, 512, 512, FIN))
.WillOnce(Return(QuicConsumedData(256, false)));
notifier_.WriteOrBufferData(5, 512, FIN);
EXPECT_TRUE(notifier_.WillingToWrite());
EXPECT_EQ(1792u, notifier_.StreamBytesSent());
EXPECT_EQ(256u, notifier_.StreamBytesToSend());
EXPECT_TRUE(notifier_.HasBufferedStreamData());
// New data cannot be sent as connection is blocked.
EXPECT_CALL(connection_, SendStreamData(7, 1024, 0, FIN)).Times(0);
notifier_.WriteOrBufferData(7, 1024, FIN);
EXPECT_EQ(1792u, notifier_.StreamBytesSent());
}
TEST_F(SimpleSessionNotifierTest, WriteOrBufferRstStream) {
InSequence s;
EXPECT_CALL(connection_, SendStreamData(5, 1024, 0, FIN))
.WillOnce(Return(QuicConsumedData(1024, true)));
notifier_.WriteOrBufferData(5, 1024, FIN);
// Reset stream 5 with no error.
EXPECT_CALL(connection_, SendControlFrame(_))
.WillRepeatedly(
Invoke(this, &SimpleSessionNotifierTest::ControlFrameConsumed));
notifier_.WriteOrBufferRstStream(5, QUIC_STREAM_NO_ERROR, 1024);
// Verify stream 5 is waiting for acks.
EXPECT_TRUE(notifier_.StreamIsWaitingForAcks(5));
// Reset stream 5 with error.
notifier_.WriteOrBufferRstStream(5, QUIC_ERROR_PROCESSING_STREAM, 1024);
EXPECT_FALSE(notifier_.StreamIsWaitingForAcks(5));
}
TEST_F(SimpleSessionNotifierTest, NeuterUnencryptedData) {
InSequence s;
// Send crypto data [0, 1024) in ENCRYPTION_NONE.
connection_.SetDefaultEncryptionLevel(ENCRYPTION_NONE);
EXPECT_CALL(connection_, SendStreamData(1, 1024, 0, NO_FIN))
.WillOnce(Return(QuicConsumedData(1024, false)));
notifier_.WriteOrBufferData(1, 1024, NO_FIN);
// Send crypto data [1024, 2048) in ENCRYPTION_INITIAL.
connection_.SetDefaultEncryptionLevel(ENCRYPTION_INITIAL);
EXPECT_CALL(connection_, SendStreamData(1, 1024, 1024, NO_FIN))
.WillOnce(Return(QuicConsumedData(1024, false)));
notifier_.WriteOrBufferData(1, 1024, NO_FIN);
// Ack [1024, 2048).
QuicStreamFrame stream_frame(1, false, 1024, 1024);
notifier_.OnFrameAcked(QuicFrame(&stream_frame), QuicTime::Delta::Zero());
EXPECT_TRUE(notifier_.StreamIsWaitingForAcks(1));
// Neuters unencrypted data.
notifier_.NeuterUnencryptedData();
EXPECT_FALSE(notifier_.StreamIsWaitingForAcks(1));
}
TEST_F(SimpleSessionNotifierTest, OnCanWrite) {
InSequence s;
// Send crypto data [0, 1024) in ENCRYPTION_NONE.
connection_.SetDefaultEncryptionLevel(ENCRYPTION_NONE);
EXPECT_CALL(connection_, SendStreamData(1, 1024, 0, NO_FIN))
.WillOnce(Return(QuicConsumedData(1024, false)));
notifier_.WriteOrBufferData(1, 1024, NO_FIN);
// Send crypto data [1024, 2048) in ENCRYPTION_INITIAL.
connection_.SetDefaultEncryptionLevel(ENCRYPTION_INITIAL);
EXPECT_CALL(connection_, SendStreamData(1, 1024, 1024, NO_FIN))
.WillOnce(Return(QuicConsumedData(1024, false)));
notifier_.WriteOrBufferData(1, 1024, NO_FIN);
// Send stream 3 [0, 1024) and connection is blocked.
EXPECT_CALL(connection_, SendStreamData(3, 1024, 0, FIN))
.WillOnce(Return(QuicConsumedData(512, false)));
notifier_.WriteOrBufferData(3, 1024, FIN);
// Send stream 5 [0, 1024).
EXPECT_CALL(connection_, SendStreamData(5, _, _, _)).Times(0);
notifier_.WriteOrBufferData(5, 1024, NO_FIN);
// Reset stream 5 with error.
EXPECT_CALL(connection_, SendControlFrame(_)).Times(0);
notifier_.WriteOrBufferRstStream(5, QUIC_ERROR_PROCESSING_STREAM, 1024);
// Lost crypto data [500, 1500) and stream 3 [0, 512).
QuicStreamFrame frame1(1, false, 500, 1000);
QuicStreamFrame frame2(3, false, 0, 512);
notifier_.OnFrameLost(QuicFrame(&frame1));
notifier_.OnFrameLost(QuicFrame(&frame2));
// Connection becomes writable.
// Lost crypto data gets retransmitted as [500, 1024) and [1024, 1500), as
// they are in different encryption levels.
EXPECT_CALL(connection_, SendStreamData(1, 524, 500, NO_FIN))
.WillOnce(Return(QuicConsumedData(524, false)));
EXPECT_CALL(connection_, SendStreamData(1, 476, 1024, NO_FIN))
.WillOnce(Return(QuicConsumedData(476, false)));
// Lost stream 3 data gets retransmitted.
EXPECT_CALL(connection_, SendStreamData(3, 512, 0, NO_FIN))
.WillOnce(Return(QuicConsumedData(512, false)));
// Buffered control frames get sent.
EXPECT_CALL(connection_, SendControlFrame(_))
.WillOnce(Invoke(this, &SimpleSessionNotifierTest::ControlFrameConsumed));
// Buffered stream 3 data [512, 1024) gets sent.
EXPECT_CALL(connection_, SendStreamData(3, 512, 512, FIN))
.WillOnce(Return(QuicConsumedData(512, true)));
notifier_.OnCanWrite();
EXPECT_FALSE(notifier_.WillingToWrite());
}
TEST_F(SimpleSessionNotifierTest, RetransmitFrames) {
InSequence s;
// Send stream 3 data [0, 10) and fin.
EXPECT_CALL(connection_, SendStreamData(3, 10, 0, FIN))
.WillOnce(Return(QuicConsumedData(10, true)));
notifier_.WriteOrBufferData(3, 10, FIN);
QuicStreamFrame frame1(3, true, 0, 10);
// Send stream 5 [0, 10) and fin.
EXPECT_CALL(connection_, SendStreamData(5, 10, 0, FIN))
.WillOnce(Return(QuicConsumedData(10, true)));
notifier_.WriteOrBufferData(5, 10, FIN);
QuicStreamFrame frame2(5, true, 0, 10);
// Reset stream 5 with no error.
EXPECT_CALL(connection_, SendControlFrame(_))
.WillOnce(Invoke(this, &SimpleSessionNotifierTest::ControlFrameConsumed));
notifier_.WriteOrBufferRstStream(5, QUIC_STREAM_NO_ERROR, 10);
// Ack stream 3 [3, 7), and stream 5 [8, 10).
QuicStreamFrame ack_frame1(3, false, 3, 4);
QuicStreamFrame ack_frame2(5, false, 8, 2);
notifier_.OnFrameAcked(QuicFrame(&ack_frame1), QuicTime::Delta::Zero());
notifier_.OnFrameAcked(QuicFrame(&ack_frame2), QuicTime::Delta::Zero());
EXPECT_FALSE(notifier_.WillingToWrite());
// Force to send.
QuicRstStreamFrame rst_stream(1, 5, QUIC_STREAM_NO_ERROR, 10);
QuicFrames frames;
frames.push_back(QuicFrame(&frame2));
frames.push_back(QuicFrame(&rst_stream));
frames.push_back(QuicFrame(&frame1));
// stream 5 data [0, 8), fin only are retransmitted.
EXPECT_CALL(connection_, SendStreamData(5, 8, 0, NO_FIN))
.WillOnce(Return(QuicConsumedData(8, false)));
EXPECT_CALL(connection_, SendStreamData(5, 0, 10, FIN))
.WillOnce(Return(QuicConsumedData(0, true)));
// rst_stream is retransmitted.
EXPECT_CALL(connection_, SendControlFrame(_))
.WillOnce(Invoke(this, &SimpleSessionNotifierTest::ControlFrameConsumed));
// stream 3 data [0, 3) is retransmitted and connection is blocked.
EXPECT_CALL(connection_, SendStreamData(3, 3, 0, NO_FIN))
.WillOnce(Return(QuicConsumedData(2, false)));
notifier_.RetransmitFrames(frames, RTO_RETRANSMISSION);
EXPECT_FALSE(notifier_.WillingToWrite());
}
} // namespace
} // namespace test
} // namespace net
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