1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "net/quic/quic_session.h"
6
7#include <set>
8#include <vector>
9
10#include "base/basictypes.h"
11#include "base/containers/hash_tables.h"
12#include "base/rand_util.h"
13#include "base/strings/string_number_conversions.h"
14#include "net/quic/crypto/crypto_protocol.h"
15#include "net/quic/quic_crypto_stream.h"
16#include "net/quic/quic_flags.h"
17#include "net/quic/quic_protocol.h"
18#include "net/quic/quic_utils.h"
19#include "net/quic/reliable_quic_stream.h"
20#include "net/quic/test_tools/quic_config_peer.h"
21#include "net/quic/test_tools/quic_connection_peer.h"
22#include "net/quic/test_tools/quic_data_stream_peer.h"
23#include "net/quic/test_tools/quic_flow_controller_peer.h"
24#include "net/quic/test_tools/quic_session_peer.h"
25#include "net/quic/test_tools/quic_test_utils.h"
26#include "net/quic/test_tools/reliable_quic_stream_peer.h"
27#include "net/spdy/spdy_framer.h"
28#include "net/test/gtest_util.h"
29#include "testing/gmock/include/gmock/gmock.h"
30#include "testing/gmock_mutant.h"
31#include "testing/gtest/include/gtest/gtest.h"
32
33using base::hash_map;
34using std::set;
35using std::vector;
36using testing::CreateFunctor;
37using testing::InSequence;
38using testing::Invoke;
39using testing::Return;
40using testing::StrictMock;
41using testing::_;
42
43namespace net {
44namespace test {
45namespace {
46
47const QuicPriority kHighestPriority = 0;
48const QuicPriority kSomeMiddlePriority = 3;
49
50class TestCryptoStream : public QuicCryptoStream {
51 public:
52  explicit TestCryptoStream(QuicSession* session)
53      : QuicCryptoStream(session) {
54  }
55
56  virtual void OnHandshakeMessage(
57      const CryptoHandshakeMessage& message) OVERRIDE {
58    encryption_established_ = true;
59    handshake_confirmed_ = true;
60    CryptoHandshakeMessage msg;
61    string error_details;
62    session()->config()->SetInitialFlowControlWindowToSend(
63        kInitialSessionFlowControlWindowForTest);
64    session()->config()->SetInitialStreamFlowControlWindowToSend(
65        kInitialStreamFlowControlWindowForTest);
66    session()->config()->SetInitialSessionFlowControlWindowToSend(
67        kInitialSessionFlowControlWindowForTest);
68    session()->config()->ToHandshakeMessage(&msg);
69    const QuicErrorCode error = session()->config()->ProcessPeerHello(
70        msg, CLIENT, &error_details);
71    EXPECT_EQ(QUIC_NO_ERROR, error);
72    session()->OnConfigNegotiated();
73    session()->OnCryptoHandshakeEvent(QuicSession::HANDSHAKE_CONFIRMED);
74  }
75
76  MOCK_METHOD0(OnCanWrite, void());
77};
78
79class TestHeadersStream : public QuicHeadersStream {
80 public:
81  explicit TestHeadersStream(QuicSession* session)
82      : QuicHeadersStream(session) {
83  }
84
85  MOCK_METHOD0(OnCanWrite, void());
86};
87
88class TestStream : public QuicDataStream {
89 public:
90  TestStream(QuicStreamId id, QuicSession* session)
91      : QuicDataStream(id, session) {
92  }
93
94  using ReliableQuicStream::CloseWriteSide;
95
96  virtual uint32 ProcessData(const char* data, uint32 data_len) OVERRIDE {
97    return data_len;
98  }
99
100  void SendBody(const string& data, bool fin) {
101    WriteOrBufferData(data, fin, NULL);
102  }
103
104  MOCK_METHOD0(OnCanWrite, void());
105};
106
107// Poor man's functor for use as callback in a mock.
108class StreamBlocker {
109 public:
110  StreamBlocker(QuicSession* session, QuicStreamId stream_id)
111      : session_(session),
112        stream_id_(stream_id) {
113  }
114
115  void MarkWriteBlocked() {
116    session_->MarkWriteBlocked(stream_id_, kSomeMiddlePriority);
117  }
118
119 private:
120  QuicSession* const session_;
121  const QuicStreamId stream_id_;
122};
123
124class TestSession : public QuicSession {
125 public:
126  explicit TestSession(QuicConnection* connection)
127      : QuicSession(connection,
128                    DefaultQuicConfig()),
129        crypto_stream_(this),
130        writev_consumes_all_data_(false) {
131    InitializeSession();
132  }
133
134  virtual TestCryptoStream* GetCryptoStream() OVERRIDE {
135    return &crypto_stream_;
136  }
137
138  virtual TestStream* CreateOutgoingDataStream() OVERRIDE {
139    TestStream* stream = new TestStream(GetNextStreamId(), this);
140    ActivateStream(stream);
141    return stream;
142  }
143
144  virtual TestStream* CreateIncomingDataStream(QuicStreamId id) OVERRIDE {
145    return new TestStream(id, this);
146  }
147
148  bool IsClosedStream(QuicStreamId id) {
149    return QuicSession::IsClosedStream(id);
150  }
151
152  QuicDataStream* GetIncomingDataStream(QuicStreamId stream_id) {
153    return QuicSession::GetIncomingDataStream(stream_id);
154  }
155
156  virtual QuicConsumedData WritevData(
157      QuicStreamId id,
158      const IOVector& data,
159      QuicStreamOffset offset,
160      bool fin,
161      FecProtection fec_protection,
162      QuicAckNotifier::DelegateInterface* ack_notifier_delegate) OVERRIDE {
163    // Always consumes everything.
164    if (writev_consumes_all_data_) {
165      return QuicConsumedData(data.TotalBufferSize(), fin);
166    } else {
167      return QuicSession::WritevData(id, data, offset, fin, fec_protection,
168                                     ack_notifier_delegate);
169    }
170  }
171
172  void set_writev_consumes_all_data(bool val) {
173    writev_consumes_all_data_ = val;
174  }
175
176  QuicConsumedData SendStreamData(QuicStreamId id) {
177    return WritevData(id, IOVector(), 0, true, MAY_FEC_PROTECT, NULL);
178  }
179
180  using QuicSession::PostProcessAfterData;
181
182 private:
183  StrictMock<TestCryptoStream> crypto_stream_;
184
185  bool writev_consumes_all_data_;
186};
187
188class QuicSessionTest : public ::testing::TestWithParam<QuicVersion> {
189 protected:
190  QuicSessionTest()
191      : connection_(new MockConnection(true, SupportedVersions(GetParam()))),
192        session_(connection_) {
193    session_.config()->SetInitialFlowControlWindowToSend(
194        kInitialSessionFlowControlWindowForTest);
195    session_.config()->SetInitialStreamFlowControlWindowToSend(
196        kInitialStreamFlowControlWindowForTest);
197    session_.config()->SetInitialSessionFlowControlWindowToSend(
198        kInitialSessionFlowControlWindowForTest);
199    headers_[":host"] = "www.google.com";
200    headers_[":path"] = "/index.hml";
201    headers_[":scheme"] = "http";
202    headers_["cookie"] =
203        "__utma=208381060.1228362404.1372200928.1372200928.1372200928.1; "
204        "__utmc=160408618; "
205        "GX=DQAAAOEAAACWJYdewdE9rIrW6qw3PtVi2-d729qaa-74KqOsM1NVQblK4VhX"
206        "hoALMsy6HOdDad2Sz0flUByv7etmo3mLMidGrBoljqO9hSVA40SLqpG_iuKKSHX"
207        "RW3Np4bq0F0SDGDNsW0DSmTS9ufMRrlpARJDS7qAI6M3bghqJp4eABKZiRqebHT"
208        "pMU-RXvTI5D5oCF1vYxYofH_l1Kviuiy3oQ1kS1enqWgbhJ2t61_SNdv-1XJIS0"
209        "O3YeHLmVCs62O6zp89QwakfAWK9d3IDQvVSJzCQsvxvNIvaZFa567MawWlXg0Rh"
210        "1zFMi5vzcns38-8_Sns; "
211        "GA=v*2%2Fmem*57968640*47239936%2Fmem*57968640*47114716%2Fno-nm-"
212        "yj*15%2Fno-cc-yj*5%2Fpc-ch*133685%2Fpc-s-cr*133947%2Fpc-s-t*1339"
213        "47%2Fno-nm-yj*4%2Fno-cc-yj*1%2Fceft-as*1%2Fceft-nqas*0%2Fad-ra-c"
214        "v_p%2Fad-nr-cv_p-f*1%2Fad-v-cv_p*859%2Fad-ns-cv_p-f*1%2Ffn-v-ad%"
215        "2Fpc-t*250%2Fpc-cm*461%2Fpc-s-cr*722%2Fpc-s-t*722%2Fau_p*4"
216        "SICAID=AJKiYcHdKgxum7KMXG0ei2t1-W4OD1uW-ecNsCqC0wDuAXiDGIcT_HA2o1"
217        "3Rs1UKCuBAF9g8rWNOFbxt8PSNSHFuIhOo2t6bJAVpCsMU5Laa6lewuTMYI8MzdQP"
218        "ARHKyW-koxuhMZHUnGBJAM1gJODe0cATO_KGoX4pbbFxxJ5IicRxOrWK_5rU3cdy6"
219        "edlR9FsEdH6iujMcHkbE5l18ehJDwTWmBKBzVD87naobhMMrF6VvnDGxQVGp9Ir_b"
220        "Rgj3RWUoPumQVCxtSOBdX0GlJOEcDTNCzQIm9BSfetog_eP_TfYubKudt5eMsXmN6"
221        "QnyXHeGeK2UINUzJ-D30AFcpqYgH9_1BvYSpi7fc7_ydBU8TaD8ZRxvtnzXqj0RfG"
222        "tuHghmv3aD-uzSYJ75XDdzKdizZ86IG6Fbn1XFhYZM-fbHhm3mVEXnyRW4ZuNOLFk"
223        "Fas6LMcVC6Q8QLlHYbXBpdNFuGbuZGUnav5C-2I_-46lL0NGg3GewxGKGHvHEfoyn"
224        "EFFlEYHsBQ98rXImL8ySDycdLEFvBPdtctPmWCfTxwmoSMLHU2SCVDhbqMWU5b0yr"
225        "JBCScs_ejbKaqBDoB7ZGxTvqlrB__2ZmnHHjCr8RgMRtKNtIeuZAo ";
226  }
227
228  void CheckClosedStreams() {
229    for (int i = kCryptoStreamId; i < 100; i++) {
230      if (closed_streams_.count(i) == 0) {
231        EXPECT_FALSE(session_.IsClosedStream(i)) << " stream id: " << i;
232      } else {
233        EXPECT_TRUE(session_.IsClosedStream(i)) << " stream id: " << i;
234      }
235    }
236  }
237
238  void CloseStream(QuicStreamId id) {
239    session_.CloseStream(id);
240    closed_streams_.insert(id);
241  }
242
243  QuicVersion version() const { return connection_->version(); }
244
245  MockConnection* connection_;
246  TestSession session_;
247  set<QuicStreamId> closed_streams_;
248  SpdyHeaderBlock headers_;
249};
250
251INSTANTIATE_TEST_CASE_P(Tests, QuicSessionTest,
252                        ::testing::ValuesIn(QuicSupportedVersions()));
253
254TEST_P(QuicSessionTest, PeerAddress) {
255  EXPECT_EQ(IPEndPoint(Loopback4(), kTestPort), session_.peer_address());
256}
257
258TEST_P(QuicSessionTest, IsCryptoHandshakeConfirmed) {
259  EXPECT_FALSE(session_.IsCryptoHandshakeConfirmed());
260  CryptoHandshakeMessage message;
261  session_.GetCryptoStream()->OnHandshakeMessage(message);
262  EXPECT_TRUE(session_.IsCryptoHandshakeConfirmed());
263}
264
265TEST_P(QuicSessionTest, IsClosedStreamDefault) {
266  // Ensure that no streams are initially closed.
267  for (int i = kCryptoStreamId; i < 100; i++) {
268    EXPECT_FALSE(session_.IsClosedStream(i)) << "stream id: " << i;
269  }
270}
271
272TEST_P(QuicSessionTest, ImplicitlyCreatedStreams) {
273  ASSERT_TRUE(session_.GetIncomingDataStream(7) != NULL);
274  // Both 3 and 5 should be implicitly created.
275  EXPECT_FALSE(session_.IsClosedStream(3));
276  EXPECT_FALSE(session_.IsClosedStream(5));
277  ASSERT_TRUE(session_.GetIncomingDataStream(5) != NULL);
278  ASSERT_TRUE(session_.GetIncomingDataStream(3) != NULL);
279}
280
281TEST_P(QuicSessionTest, IsClosedStreamLocallyCreated) {
282  TestStream* stream2 = session_.CreateOutgoingDataStream();
283  EXPECT_EQ(2u, stream2->id());
284  TestStream* stream4 = session_.CreateOutgoingDataStream();
285  EXPECT_EQ(4u, stream4->id());
286
287  CheckClosedStreams();
288  CloseStream(4);
289  CheckClosedStreams();
290  CloseStream(2);
291  CheckClosedStreams();
292}
293
294TEST_P(QuicSessionTest, IsClosedStreamPeerCreated) {
295  QuicStreamId stream_id1 = kClientDataStreamId1;
296  QuicStreamId stream_id2 = kClientDataStreamId2;
297  QuicDataStream* stream1 = session_.GetIncomingDataStream(stream_id1);
298  QuicDataStreamPeer::SetHeadersDecompressed(stream1, true);
299  QuicDataStream* stream2 = session_.GetIncomingDataStream(stream_id2);
300  QuicDataStreamPeer::SetHeadersDecompressed(stream2, true);
301
302  CheckClosedStreams();
303  CloseStream(stream_id1);
304  CheckClosedStreams();
305  CloseStream(stream_id2);
306  // Create a stream explicitly, and another implicitly.
307  QuicDataStream* stream3 = session_.GetIncomingDataStream(stream_id2 + 4);
308  QuicDataStreamPeer::SetHeadersDecompressed(stream3, true);
309  CheckClosedStreams();
310  // Close one, but make sure the other is still not closed
311  CloseStream(stream3->id());
312  CheckClosedStreams();
313}
314
315TEST_P(QuicSessionTest, StreamIdTooLarge) {
316  QuicStreamId stream_id = kClientDataStreamId1;
317  session_.GetIncomingDataStream(stream_id);
318  EXPECT_CALL(*connection_, SendConnectionClose(QUIC_INVALID_STREAM_ID));
319  session_.GetIncomingDataStream(stream_id + kMaxStreamIdDelta + 2);
320}
321
322TEST_P(QuicSessionTest, DecompressionError) {
323  QuicHeadersStream* stream = QuicSessionPeer::GetHeadersStream(&session_);
324  const unsigned char data[] = {
325    0x80, 0x03, 0x00, 0x01,  // SPDY/3 SYN_STREAM frame
326    0x00, 0x00, 0x00, 0x25,  // flags/length
327    0x00, 0x00, 0x00, 0x05,  // stream id
328    0x00, 0x00, 0x00, 0x00,  // associated stream id
329    0x00, 0x00,
330    'a',  'b',  'c',  'd'    // invalid compressed data
331  };
332  EXPECT_CALL(*connection_,
333              SendConnectionCloseWithDetails(QUIC_INVALID_HEADERS_STREAM_DATA,
334                                             "SPDY framing error."));
335  stream->ProcessRawData(reinterpret_cast<const char*>(data),
336                         arraysize(data));
337}
338
339TEST_P(QuicSessionTest, DebugDFatalIfMarkingClosedStreamWriteBlocked) {
340  TestStream* stream2 = session_.CreateOutgoingDataStream();
341  // Close the stream.
342  stream2->Reset(QUIC_BAD_APPLICATION_PAYLOAD);
343  // TODO(rtenneti): enable when chromium supports EXPECT_DEBUG_DFATAL.
344  /*
345  QuicStreamId kClosedStreamId = stream2->id();
346  EXPECT_DEBUG_DFATAL(
347      session_.MarkWriteBlocked(kClosedStreamId, kSomeMiddlePriority),
348      "Marking unknown stream 2 blocked.");
349  */
350}
351
352TEST_P(QuicSessionTest, DebugDFatalIfMarkWriteBlockedCalledWithWrongPriority) {
353  const QuicPriority kDifferentPriority = 0;
354
355  TestStream* stream2 = session_.CreateOutgoingDataStream();
356  EXPECT_NE(kDifferentPriority, stream2->EffectivePriority());
357  // TODO(rtenneti): enable when chromium supports EXPECT_DEBUG_DFATAL.
358  /*
359  EXPECT_DEBUG_DFATAL(
360      session_.MarkWriteBlocked(stream2->id(), kDifferentPriority),
361      "Priorities do not match.  Got: 0 Expected: 3");
362  */
363}
364
365TEST_P(QuicSessionTest, OnCanWrite) {
366  TestStream* stream2 = session_.CreateOutgoingDataStream();
367  TestStream* stream4 = session_.CreateOutgoingDataStream();
368  TestStream* stream6 = session_.CreateOutgoingDataStream();
369
370  session_.MarkWriteBlocked(stream2->id(), kSomeMiddlePriority);
371  session_.MarkWriteBlocked(stream6->id(), kSomeMiddlePriority);
372  session_.MarkWriteBlocked(stream4->id(), kSomeMiddlePriority);
373
374  InSequence s;
375  StreamBlocker stream2_blocker(&session_, stream2->id());
376  // Reregister, to test the loop limit.
377  EXPECT_CALL(*stream2, OnCanWrite())
378      .WillOnce(Invoke(&stream2_blocker, &StreamBlocker::MarkWriteBlocked));
379  EXPECT_CALL(*stream6, OnCanWrite());
380  EXPECT_CALL(*stream4, OnCanWrite());
381  session_.OnCanWrite();
382  EXPECT_TRUE(session_.WillingAndAbleToWrite());
383}
384
385TEST_P(QuicSessionTest, OnCanWriteBundlesStreams) {
386  // Drive congestion control manually.
387  MockSendAlgorithm* send_algorithm = new StrictMock<MockSendAlgorithm>;
388  QuicConnectionPeer::SetSendAlgorithm(session_.connection(), send_algorithm);
389
390  TestStream* stream2 = session_.CreateOutgoingDataStream();
391  TestStream* stream4 = session_.CreateOutgoingDataStream();
392  TestStream* stream6 = session_.CreateOutgoingDataStream();
393
394  session_.MarkWriteBlocked(stream2->id(), kSomeMiddlePriority);
395  session_.MarkWriteBlocked(stream6->id(), kSomeMiddlePriority);
396  session_.MarkWriteBlocked(stream4->id(), kSomeMiddlePriority);
397
398  EXPECT_CALL(*send_algorithm, TimeUntilSend(_, _, _)).WillRepeatedly(
399      Return(QuicTime::Delta::Zero()));
400  EXPECT_CALL(*send_algorithm, GetCongestionWindow())
401      .WillOnce(Return(kMaxPacketSize * 10));
402  EXPECT_CALL(*stream2, OnCanWrite())
403      .WillOnce(IgnoreResult(Invoke(CreateFunctor(
404          &session_, &TestSession::SendStreamData, stream2->id()))));
405  EXPECT_CALL(*stream4, OnCanWrite())
406      .WillOnce(IgnoreResult(Invoke(CreateFunctor(
407          &session_, &TestSession::SendStreamData, stream4->id()))));
408  EXPECT_CALL(*stream6, OnCanWrite())
409      .WillOnce(IgnoreResult(Invoke(CreateFunctor(
410          &session_, &TestSession::SendStreamData, stream6->id()))));
411
412  // Expect that we only send one packet, the writes from different streams
413  // should be bundled together.
414  MockPacketWriter* writer =
415      static_cast<MockPacketWriter*>(
416          QuicConnectionPeer::GetWriter(session_.connection()));
417  EXPECT_CALL(*writer, WritePacket(_, _, _, _)).WillOnce(
418                  Return(WriteResult(WRITE_STATUS_OK, 0)));
419  EXPECT_CALL(*send_algorithm, OnPacketSent(_, _, _, _, _)).Times(1);
420  session_.OnCanWrite();
421  EXPECT_FALSE(session_.WillingAndAbleToWrite());
422}
423
424TEST_P(QuicSessionTest, OnCanWriteCongestionControlBlocks) {
425  InSequence s;
426
427  // Drive congestion control manually.
428  MockSendAlgorithm* send_algorithm = new StrictMock<MockSendAlgorithm>;
429  QuicConnectionPeer::SetSendAlgorithm(session_.connection(), send_algorithm);
430
431  TestStream* stream2 = session_.CreateOutgoingDataStream();
432  TestStream* stream4 = session_.CreateOutgoingDataStream();
433  TestStream* stream6 = session_.CreateOutgoingDataStream();
434
435  session_.MarkWriteBlocked(stream2->id(), kSomeMiddlePriority);
436  session_.MarkWriteBlocked(stream6->id(), kSomeMiddlePriority);
437  session_.MarkWriteBlocked(stream4->id(), kSomeMiddlePriority);
438
439  StreamBlocker stream2_blocker(&session_, stream2->id());
440  EXPECT_CALL(*send_algorithm, TimeUntilSend(_, _, _)).WillOnce(Return(
441      QuicTime::Delta::Zero()));
442  EXPECT_CALL(*stream2, OnCanWrite());
443  EXPECT_CALL(*send_algorithm, TimeUntilSend(_, _, _)).WillOnce(Return(
444      QuicTime::Delta::Zero()));
445  EXPECT_CALL(*stream6, OnCanWrite());
446  EXPECT_CALL(*send_algorithm, TimeUntilSend(_, _, _)).WillOnce(Return(
447      QuicTime::Delta::Infinite()));
448  // stream4->OnCanWrite is not called.
449
450  session_.OnCanWrite();
451  EXPECT_TRUE(session_.WillingAndAbleToWrite());
452
453  // Still congestion-control blocked.
454  EXPECT_CALL(*send_algorithm, TimeUntilSend(_, _, _)).WillOnce(Return(
455      QuicTime::Delta::Infinite()));
456  session_.OnCanWrite();
457  EXPECT_TRUE(session_.WillingAndAbleToWrite());
458
459  // stream4->OnCanWrite is called once the connection stops being
460  // congestion-control blocked.
461  EXPECT_CALL(*send_algorithm, TimeUntilSend(_, _, _)).WillOnce(Return(
462      QuicTime::Delta::Zero()));
463  EXPECT_CALL(*stream4, OnCanWrite());
464  session_.OnCanWrite();
465  EXPECT_FALSE(session_.WillingAndAbleToWrite());
466}
467
468TEST_P(QuicSessionTest, BufferedHandshake) {
469  EXPECT_FALSE(session_.HasPendingHandshake());  // Default value.
470
471  // Test that blocking other streams does not change our status.
472  TestStream* stream2 = session_.CreateOutgoingDataStream();
473  StreamBlocker stream2_blocker(&session_, stream2->id());
474  stream2_blocker.MarkWriteBlocked();
475  EXPECT_FALSE(session_.HasPendingHandshake());
476
477  TestStream* stream3 = session_.CreateOutgoingDataStream();
478  StreamBlocker stream3_blocker(&session_, stream3->id());
479  stream3_blocker.MarkWriteBlocked();
480  EXPECT_FALSE(session_.HasPendingHandshake());
481
482  // Blocking (due to buffering of) the Crypto stream is detected.
483  session_.MarkWriteBlocked(kCryptoStreamId, kHighestPriority);
484  EXPECT_TRUE(session_.HasPendingHandshake());
485
486  TestStream* stream4 = session_.CreateOutgoingDataStream();
487  StreamBlocker stream4_blocker(&session_, stream4->id());
488  stream4_blocker.MarkWriteBlocked();
489  EXPECT_TRUE(session_.HasPendingHandshake());
490
491  InSequence s;
492  // Force most streams to re-register, which is common scenario when we block
493  // the Crypto stream, and only the crypto stream can "really" write.
494
495  // Due to prioritization, we *should* be asked to write the crypto stream
496  // first.
497  // Don't re-register the crypto stream (which signals complete writing).
498  TestCryptoStream* crypto_stream = session_.GetCryptoStream();
499  EXPECT_CALL(*crypto_stream, OnCanWrite());
500
501  // Re-register all other streams, to show they weren't able to proceed.
502  EXPECT_CALL(*stream2, OnCanWrite())
503      .WillOnce(Invoke(&stream2_blocker, &StreamBlocker::MarkWriteBlocked));
504  EXPECT_CALL(*stream3, OnCanWrite())
505      .WillOnce(Invoke(&stream3_blocker, &StreamBlocker::MarkWriteBlocked));
506  EXPECT_CALL(*stream4, OnCanWrite())
507      .WillOnce(Invoke(&stream4_blocker, &StreamBlocker::MarkWriteBlocked));
508
509  session_.OnCanWrite();
510  EXPECT_TRUE(session_.WillingAndAbleToWrite());
511  EXPECT_FALSE(session_.HasPendingHandshake());  // Crypto stream wrote.
512}
513
514TEST_P(QuicSessionTest, OnCanWriteWithClosedStream) {
515  TestStream* stream2 = session_.CreateOutgoingDataStream();
516  TestStream* stream4 = session_.CreateOutgoingDataStream();
517  TestStream* stream6 = session_.CreateOutgoingDataStream();
518
519  session_.MarkWriteBlocked(stream2->id(), kSomeMiddlePriority);
520  session_.MarkWriteBlocked(stream6->id(), kSomeMiddlePriority);
521  session_.MarkWriteBlocked(stream4->id(), kSomeMiddlePriority);
522  CloseStream(stream6->id());
523
524  InSequence s;
525  EXPECT_CALL(*stream2, OnCanWrite());
526  EXPECT_CALL(*stream4, OnCanWrite());
527  session_.OnCanWrite();
528  EXPECT_FALSE(session_.WillingAndAbleToWrite());
529}
530
531TEST_P(QuicSessionTest, OnCanWriteLimitsNumWritesIfFlowControlBlocked) {
532  if (version() < QUIC_VERSION_19) {
533    return;
534  }
535
536  // Ensure connection level flow control blockage.
537  QuicFlowControllerPeer::SetSendWindowOffset(session_.flow_controller(), 0);
538  EXPECT_TRUE(session_.flow_controller()->IsBlocked());
539
540  // Mark the crypto and headers streams as write blocked, we expect them to be
541  // allowed to write later.
542  session_.MarkWriteBlocked(kCryptoStreamId, kHighestPriority);
543  session_.MarkWriteBlocked(kHeadersStreamId, kHighestPriority);
544
545  // Create a data stream, and although it is write blocked we never expect it
546  // to be allowed to write as we are connection level flow control blocked.
547  TestStream* stream = session_.CreateOutgoingDataStream();
548  session_.MarkWriteBlocked(stream->id(), kSomeMiddlePriority);
549  EXPECT_CALL(*stream, OnCanWrite()).Times(0);
550
551  // The crypto and headers streams should be called even though we are
552  // connection flow control blocked.
553  TestCryptoStream* crypto_stream = session_.GetCryptoStream();
554  EXPECT_CALL(*crypto_stream, OnCanWrite()).Times(1);
555  TestHeadersStream* headers_stream = new TestHeadersStream(&session_);
556  QuicSessionPeer::SetHeadersStream(&session_, headers_stream);
557  EXPECT_CALL(*headers_stream, OnCanWrite()).Times(1);
558
559  session_.OnCanWrite();
560  EXPECT_FALSE(session_.WillingAndAbleToWrite());
561}
562
563TEST_P(QuicSessionTest, SendGoAway) {
564  EXPECT_CALL(*connection_,
565              SendGoAway(QUIC_PEER_GOING_AWAY, 0u, "Going Away."));
566  session_.SendGoAway(QUIC_PEER_GOING_AWAY, "Going Away.");
567  EXPECT_TRUE(session_.goaway_sent());
568
569  EXPECT_CALL(*connection_,
570              SendRstStream(3u, QUIC_STREAM_PEER_GOING_AWAY, 0)).Times(0);
571  EXPECT_TRUE(session_.GetIncomingDataStream(3u));
572}
573
574TEST_P(QuicSessionTest, DoNotSendGoAwayTwice) {
575  EXPECT_CALL(*connection_,
576              SendGoAway(QUIC_PEER_GOING_AWAY, 0u, "Going Away.")).Times(1);
577  session_.SendGoAway(QUIC_PEER_GOING_AWAY, "Going Away.");
578  EXPECT_TRUE(session_.goaway_sent());
579  session_.SendGoAway(QUIC_PEER_GOING_AWAY, "Going Away.");
580}
581
582TEST_P(QuicSessionTest, IncreasedTimeoutAfterCryptoHandshake) {
583  // Add 1 to the connection timeout on the server side.
584  EXPECT_EQ(kDefaultInitialTimeoutSecs + 1,
585            QuicConnectionPeer::GetNetworkTimeout(connection_).ToSeconds());
586  CryptoHandshakeMessage msg;
587  session_.GetCryptoStream()->OnHandshakeMessage(msg);
588  EXPECT_EQ(kMaximumIdleTimeoutSecs + 1,
589            QuicConnectionPeer::GetNetworkTimeout(connection_).ToSeconds());
590}
591
592TEST_P(QuicSessionTest, RstStreamBeforeHeadersDecompressed) {
593  // Send two bytes of payload.
594  QuicStreamFrame data1(kClientDataStreamId1, false, 0, MakeIOVector("HT"));
595  vector<QuicStreamFrame> frames;
596  frames.push_back(data1);
597  session_.OnStreamFrames(frames);
598  EXPECT_EQ(1u, session_.GetNumOpenStreams());
599
600  QuicRstStreamFrame rst1(kClientDataStreamId1, QUIC_STREAM_NO_ERROR, 0);
601  session_.OnRstStream(rst1);
602  EXPECT_EQ(0u, session_.GetNumOpenStreams());
603  // Connection should remain alive.
604  EXPECT_TRUE(connection_->connected());
605}
606
607TEST_P(QuicSessionTest, MultipleRstStreamsCauseSingleConnectionClose) {
608  // If multiple invalid reset stream frames arrive in a single packet, this
609  // should trigger a connection close. However there is no need to send
610  // multiple connection close frames.
611
612  // Create valid stream.
613  QuicStreamFrame data1(kClientDataStreamId1, false, 0, MakeIOVector("HT"));
614  vector<QuicStreamFrame> frames;
615  frames.push_back(data1);
616  session_.OnStreamFrames(frames);
617  EXPECT_EQ(1u, session_.GetNumOpenStreams());
618
619  // Process first invalid stream reset, resulting in the connection being
620  // closed.
621  EXPECT_CALL(*connection_, SendConnectionClose(QUIC_INVALID_STREAM_ID))
622      .Times(1);
623  QuicStreamId kLargeInvalidStreamId = 99999999;
624  QuicRstStreamFrame rst1(kLargeInvalidStreamId, QUIC_STREAM_NO_ERROR, 0);
625  session_.OnRstStream(rst1);
626  QuicConnectionPeer::CloseConnection(connection_);
627
628  // Processing of second invalid stream reset should not result in the
629  // connection being closed for a second time.
630  QuicRstStreamFrame rst2(kLargeInvalidStreamId, QUIC_STREAM_NO_ERROR, 0);
631  session_.OnRstStream(rst2);
632}
633
634TEST_P(QuicSessionTest, HandshakeUnblocksFlowControlBlockedStream) {
635  // Test that if a stream is flow control blocked, then on receipt of the SHLO
636  // containing a suitable send window offset, the stream becomes unblocked.
637  if (version() <= QUIC_VERSION_16) {
638    return;
639  }
640
641  // Ensure that Writev consumes all the data it is given (simulate no socket
642  // blocking).
643  session_.set_writev_consumes_all_data(true);
644
645  // Create a stream, and send enough data to make it flow control blocked.
646  TestStream* stream2 = session_.CreateOutgoingDataStream();
647  string body(kDefaultFlowControlSendWindow, '.');
648  EXPECT_FALSE(stream2->flow_controller()->IsBlocked());
649  stream2->SendBody(body, false);
650  EXPECT_TRUE(stream2->flow_controller()->IsBlocked());
651
652  // The handshake message will call OnCanWrite, so the stream can resume
653  // writing.
654  EXPECT_CALL(*stream2, OnCanWrite());
655  // Now complete the crypto handshake, resulting in an increased flow control
656  // send window.
657  CryptoHandshakeMessage msg;
658  session_.GetCryptoStream()->OnHandshakeMessage(msg);
659
660  // Stream is now unblocked.
661  EXPECT_FALSE(stream2->flow_controller()->IsBlocked());
662}
663
664TEST_P(QuicSessionTest, HandshakeUnblocksFlowControlBlockedCryptoStream) {
665  if (version() <= QUIC_VERSION_19) {
666    return;
667  }
668  // Test that if the crypto stream is flow control blocked, then if the SHLO
669  // contains a larger send window offset, the stream becomes unblocked.
670  session_.set_writev_consumes_all_data(true);
671  TestCryptoStream* crypto_stream = session_.GetCryptoStream();
672  EXPECT_FALSE(crypto_stream->flow_controller()->IsBlocked());
673  QuicHeadersStream* headers_stream =
674        QuicSessionPeer::GetHeadersStream(&session_);
675  EXPECT_FALSE(headers_stream->flow_controller()->IsBlocked());
676  // Write until the crypto stream is flow control blocked.
677  int i = 0;
678  while (!crypto_stream->flow_controller()->IsBlocked() && i < 1000) {
679    QuicConfig config;
680    CryptoHandshakeMessage crypto_message;
681    config.ToHandshakeMessage(&crypto_message);
682    crypto_stream->SendHandshakeMessage(crypto_message);
683    ++i;
684  }
685  EXPECT_TRUE(crypto_stream->flow_controller()->IsBlocked());
686  EXPECT_FALSE(headers_stream->flow_controller()->IsBlocked());
687  EXPECT_FALSE(session_.HasDataToWrite());
688  EXPECT_TRUE(crypto_stream->HasBufferedData());
689
690  // The handshake message will call OnCanWrite, so the stream can
691  // resume writing.
692  EXPECT_CALL(*crypto_stream, OnCanWrite());
693  // Now complete the crypto handshake, resulting in an increased flow control
694  // send window.
695  CryptoHandshakeMessage msg;
696  session_.GetCryptoStream()->OnHandshakeMessage(msg);
697
698  // Stream is now unblocked and will no longer have buffered data.
699  EXPECT_FALSE(crypto_stream->flow_controller()->IsBlocked());
700}
701
702TEST_P(QuicSessionTest, HandshakeUnblocksFlowControlBlockedHeadersStream) {
703  if (version() <= QUIC_VERSION_19) {
704    return;
705  }
706  // Test that if the header stream is flow control blocked, then if the SHLO
707  // contains a larger send window offset, the stream becomes unblocked.
708  session_.set_writev_consumes_all_data(true);
709  TestCryptoStream* crypto_stream = session_.GetCryptoStream();
710  EXPECT_FALSE(crypto_stream->flow_controller()->IsBlocked());
711  QuicHeadersStream* headers_stream =
712      QuicSessionPeer::GetHeadersStream(&session_);
713  EXPECT_FALSE(headers_stream->flow_controller()->IsBlocked());
714  QuicStreamId stream_id = 5;
715  // Write until the header stream is flow control blocked.
716  while (!headers_stream->flow_controller()->IsBlocked() && stream_id < 2000) {
717    SpdyHeaderBlock headers;
718    headers["header"] = base::Uint64ToString(base::RandUint64()) +
719        base::Uint64ToString(base::RandUint64()) +
720        base::Uint64ToString(base::RandUint64());
721    headers_stream->WriteHeaders(stream_id, headers, true, nullptr);
722    stream_id += 2;
723  }
724  EXPECT_TRUE(headers_stream->flow_controller()->IsBlocked());
725  EXPECT_FALSE(crypto_stream->flow_controller()->IsBlocked());
726  EXPECT_FALSE(session_.HasDataToWrite());
727  EXPECT_TRUE(headers_stream->HasBufferedData());
728
729  // Now complete the crypto handshake, resulting in an increased flow control
730  // send window.
731  CryptoHandshakeMessage msg;
732  session_.GetCryptoStream()->OnHandshakeMessage(msg);
733
734  // Stream is now unblocked and will no longer have buffered data.
735  EXPECT_FALSE(headers_stream->flow_controller()->IsBlocked());
736  EXPECT_FALSE(headers_stream->HasBufferedData());
737}
738
739TEST_P(QuicSessionTest, InvalidFlowControlWindowInHandshake) {
740  // TODO(rjshade): Remove this test when removing QUIC_VERSION_19.
741  // Test that receipt of an invalid (< default) flow control window from
742  // the peer results in the connection being torn down.
743  if (version() <= QUIC_VERSION_16 || version() > QUIC_VERSION_19) {
744    return;
745  }
746
747  uint32 kInvalidWindow = kDefaultFlowControlSendWindow - 1;
748  QuicConfigPeer::SetReceivedInitialFlowControlWindow(session_.config(),
749                                                      kInvalidWindow);
750
751  EXPECT_CALL(*connection_,
752              SendConnectionClose(QUIC_FLOW_CONTROL_INVALID_WINDOW)).Times(2);
753  session_.OnConfigNegotiated();
754}
755
756TEST_P(QuicSessionTest, InvalidStreamFlowControlWindowInHandshake) {
757  // Test that receipt of an invalid (< default) stream flow control window from
758  // the peer results in the connection being torn down.
759  if (version() <= QUIC_VERSION_19) {
760    return;
761  }
762
763  uint32 kInvalidWindow = kDefaultFlowControlSendWindow - 1;
764  QuicConfigPeer::SetReceivedInitialStreamFlowControlWindow(session_.config(),
765                                                            kInvalidWindow);
766
767  EXPECT_CALL(*connection_,
768              SendConnectionClose(QUIC_FLOW_CONTROL_INVALID_WINDOW));
769  session_.OnConfigNegotiated();
770}
771
772TEST_P(QuicSessionTest, InvalidSessionFlowControlWindowInHandshake) {
773  // Test that receipt of an invalid (< default) session flow control window
774  // from the peer results in the connection being torn down.
775  if (version() <= QUIC_VERSION_19) {
776    return;
777  }
778
779  uint32 kInvalidWindow = kDefaultFlowControlSendWindow - 1;
780  QuicConfigPeer::SetReceivedInitialSessionFlowControlWindow(session_.config(),
781                                                             kInvalidWindow);
782
783  EXPECT_CALL(*connection_,
784              SendConnectionClose(QUIC_FLOW_CONTROL_INVALID_WINDOW));
785  session_.OnConfigNegotiated();
786}
787
788TEST_P(QuicSessionTest, ConnectionFlowControlAccountingRstOutOfOrder) {
789  if (version() < QUIC_VERSION_19) {
790    return;
791  }
792
793  // Test that when we receive an out of order stream RST we correctly adjust
794  // our connection level flow control receive window.
795  // On close, the stream should mark as consumed all bytes between the highest
796  // byte consumed so far and the final byte offset from the RST frame.
797  TestStream* stream = session_.CreateOutgoingDataStream();
798
799  const QuicStreamOffset kByteOffset =
800      1 + kInitialSessionFlowControlWindowForTest / 2;
801
802  // Expect no stream WINDOW_UPDATE frames, as stream read side closed.
803  EXPECT_CALL(*connection_, SendWindowUpdate(stream->id(), _)).Times(0);
804  // We do expect a connection level WINDOW_UPDATE when the stream is reset.
805  EXPECT_CALL(*connection_,
806              SendWindowUpdate(0, kInitialSessionFlowControlWindowForTest +
807                                      kByteOffset)).Times(1);
808
809  QuicRstStreamFrame rst_frame(stream->id(), QUIC_STREAM_CANCELLED,
810                               kByteOffset);
811  session_.OnRstStream(rst_frame);
812  session_.PostProcessAfterData();
813  EXPECT_EQ(kByteOffset, session_.flow_controller()->bytes_consumed());
814}
815
816TEST_P(QuicSessionTest, ConnectionFlowControlAccountingFinAndLocalReset) {
817  if (version() < QUIC_VERSION_19) {
818    return;
819  }
820
821  // Test the situation where we receive a FIN on a stream, and before we fully
822  // consume all the data from the sequencer buffer we locally RST the stream.
823  // The bytes between highest consumed byte, and the final byte offset that we
824  // determined when the FIN arrived, should be marked as consumed at the
825  // connection level flow controller when the stream is reset.
826  TestStream* stream = session_.CreateOutgoingDataStream();
827
828  const QuicStreamOffset kByteOffset =
829      1 + kInitialSessionFlowControlWindowForTest / 2;
830  QuicStreamFrame frame(stream->id(), true, kByteOffset, IOVector());
831  vector<QuicStreamFrame> frames;
832  frames.push_back(frame);
833  session_.OnStreamFrames(frames);
834  session_.PostProcessAfterData();
835
836  EXPECT_EQ(0u, stream->flow_controller()->bytes_consumed());
837  EXPECT_EQ(kByteOffset,
838            stream->flow_controller()->highest_received_byte_offset());
839
840  // We only expect to see a connection WINDOW_UPDATE when talking
841  // QUIC_VERSION_19, as in this case both stream and session flow control
842  // windows are the same size. In later versions we will not see a connection
843  // level WINDOW_UPDATE when exhausting a stream, as the stream flow control
844  // limit is much lower than the connection flow control limit.
845  if (version() == QUIC_VERSION_19) {
846    // Expect no stream WINDOW_UPDATE frames, as stream read side closed.
847    EXPECT_CALL(*connection_, SendWindowUpdate(stream->id(), _)).Times(0);
848    // We do expect a connection level WINDOW_UPDATE when the stream is reset.
849    EXPECT_CALL(*connection_,
850                SendWindowUpdate(0, kInitialSessionFlowControlWindowForTest +
851                                        kByteOffset)).Times(1);
852  }
853
854  // Reset stream locally.
855  stream->Reset(QUIC_STREAM_CANCELLED);
856  EXPECT_EQ(kByteOffset, session_.flow_controller()->bytes_consumed());
857}
858
859TEST_P(QuicSessionTest, ConnectionFlowControlAccountingFinAfterRst) {
860  // Test that when we RST the stream (and tear down stream state), and then
861  // receive a FIN from the peer, we correctly adjust our connection level flow
862  // control receive window.
863  if (version() < QUIC_VERSION_19) {
864    return;
865  }
866
867  // Connection starts with some non-zero highest received byte offset,
868  // due to other active streams.
869  const uint64 kInitialConnectionBytesConsumed = 567;
870  const uint64 kInitialConnectionHighestReceivedOffset = 1234;
871  EXPECT_LT(kInitialConnectionBytesConsumed,
872            kInitialConnectionHighestReceivedOffset);
873  session_.flow_controller()->UpdateHighestReceivedOffset(
874      kInitialConnectionHighestReceivedOffset);
875  session_.flow_controller()->AddBytesConsumed(kInitialConnectionBytesConsumed);
876
877  // Reset our stream: this results in the stream being closed locally.
878  TestStream* stream = session_.CreateOutgoingDataStream();
879  stream->Reset(QUIC_STREAM_CANCELLED);
880
881  // Now receive a response from the peer with a FIN. We should handle this by
882  // adjusting the connection level flow control receive window to take into
883  // account the total number of bytes sent by the peer.
884  const QuicStreamOffset kByteOffset = 5678;
885  string body = "hello";
886  IOVector data = MakeIOVector(body);
887  QuicStreamFrame frame(stream->id(), true, kByteOffset, data);
888  vector<QuicStreamFrame> frames;
889  frames.push_back(frame);
890  session_.OnStreamFrames(frames);
891
892  QuicStreamOffset total_stream_bytes_sent_by_peer =
893      kByteOffset + body.length();
894  EXPECT_EQ(kInitialConnectionBytesConsumed + total_stream_bytes_sent_by_peer,
895            session_.flow_controller()->bytes_consumed());
896  EXPECT_EQ(
897      kInitialConnectionHighestReceivedOffset + total_stream_bytes_sent_by_peer,
898      session_.flow_controller()->highest_received_byte_offset());
899}
900
901TEST_P(QuicSessionTest, ConnectionFlowControlAccountingRstAfterRst) {
902  // Test that when we RST the stream (and tear down stream state), and then
903  // receive a RST from the peer, we correctly adjust our connection level flow
904  // control receive window.
905  if (version() < QUIC_VERSION_19) {
906    return;
907  }
908
909  // Connection starts with some non-zero highest received byte offset,
910  // due to other active streams.
911  const uint64 kInitialConnectionBytesConsumed = 567;
912  const uint64 kInitialConnectionHighestReceivedOffset = 1234;
913  EXPECT_LT(kInitialConnectionBytesConsumed,
914            kInitialConnectionHighestReceivedOffset);
915  session_.flow_controller()->UpdateHighestReceivedOffset(
916      kInitialConnectionHighestReceivedOffset);
917  session_.flow_controller()->AddBytesConsumed(kInitialConnectionBytesConsumed);
918
919  // Reset our stream: this results in the stream being closed locally.
920  TestStream* stream = session_.CreateOutgoingDataStream();
921  stream->Reset(QUIC_STREAM_CANCELLED);
922
923  // Now receive a RST from the peer. We should handle this by adjusting the
924  // connection level flow control receive window to take into account the total
925  // number of bytes sent by the peer.
926  const QuicStreamOffset kByteOffset = 5678;
927  QuicRstStreamFrame rst_frame(stream->id(), QUIC_STREAM_CANCELLED,
928                               kByteOffset);
929  session_.OnRstStream(rst_frame);
930
931  EXPECT_EQ(kInitialConnectionBytesConsumed + kByteOffset,
932            session_.flow_controller()->bytes_consumed());
933  EXPECT_EQ(kInitialConnectionHighestReceivedOffset + kByteOffset,
934            session_.flow_controller()->highest_received_byte_offset());
935}
936
937TEST_P(QuicSessionTest, FlowControlWithInvalidFinalOffset) {
938  // Test that if we receive a stream RST with a highest byte offset that
939  // violates flow control, that we close the connection.
940  if (version() <= QUIC_VERSION_16) {
941    return;
942  }
943
944  const uint64 kLargeOffset = kInitialSessionFlowControlWindowForTest + 1;
945  EXPECT_CALL(*connection_,
946              SendConnectionClose(QUIC_FLOW_CONTROL_RECEIVED_TOO_MUCH_DATA))
947      .Times(2);
948
949  // Check that stream frame + FIN results in connection close.
950  TestStream* stream = session_.CreateOutgoingDataStream();
951  stream->Reset(QUIC_STREAM_CANCELLED);
952  QuicStreamFrame frame(stream->id(), true, kLargeOffset, IOVector());
953  vector<QuicStreamFrame> frames;
954  frames.push_back(frame);
955  session_.OnStreamFrames(frames);
956
957  // Check that RST results in connection close.
958  QuicRstStreamFrame rst_frame(stream->id(), QUIC_STREAM_CANCELLED,
959                               kLargeOffset);
960  session_.OnRstStream(rst_frame);
961}
962
963TEST_P(QuicSessionTest, VersionNegotiationDisablesFlowControl) {
964  if (version() < QUIC_VERSION_19) {
965    return;
966  }
967
968  // Test that after successful version negotiation, flow control is disabled
969  // appropriately at both the connection and stream level.
970
971  // Initially both stream and connection flow control are enabled.
972  TestStream* stream = session_.CreateOutgoingDataStream();
973  EXPECT_TRUE(stream->flow_controller()->IsEnabled());
974  EXPECT_TRUE(session_.flow_controller()->IsEnabled());
975
976  // Version 18 implies that stream flow control is enabled, but connection
977  // level is disabled.
978  session_.OnSuccessfulVersionNegotiation(QUIC_VERSION_18);
979  EXPECT_FALSE(session_.flow_controller()->IsEnabled());
980  EXPECT_TRUE(stream->flow_controller()->IsEnabled());
981
982  // Version 16 means all flow control is disabled.
983  session_.OnSuccessfulVersionNegotiation(QUIC_VERSION_16);
984  EXPECT_FALSE(session_.flow_controller()->IsEnabled());
985  EXPECT_FALSE(stream->flow_controller()->IsEnabled());
986}
987
988TEST_P(QuicSessionTest, WindowUpdateUnblocksHeadersStream) {
989  // Test that a flow control blocked headers stream gets unblocked on recipt of
990  // a WINDOW_UPDATE frame. Regression test for b/17413860.
991  if (version() < QUIC_VERSION_21) {
992    return;
993  }
994
995  // Set the headers stream to be flow control blocked.
996  QuicHeadersStream* headers_stream =
997      QuicSessionPeer::GetHeadersStream(&session_);
998  QuicFlowControllerPeer::SetSendWindowOffset(headers_stream->flow_controller(),
999                                              0);
1000  EXPECT_TRUE(headers_stream->flow_controller()->IsBlocked());
1001
1002  // Unblock the headers stream by supplying a WINDOW_UPDATE.
1003  QuicWindowUpdateFrame window_update_frame(headers_stream->id(),
1004                                            2 * kDefaultFlowControlSendWindow);
1005  vector<QuicWindowUpdateFrame> frames;
1006  frames.push_back(window_update_frame);
1007  session_.OnWindowUpdateFrames(frames);
1008  EXPECT_FALSE(headers_stream->flow_controller()->IsBlocked());
1009}
1010
1011TEST_P(QuicSessionTest, TooManyUnfinishedStreamsCauseConnectionClose) {
1012  if (version() < QUIC_VERSION_18) {
1013    return;
1014  }
1015  // If a buggy/malicious peer creates too many streams that are not ended with
1016  // a FIN or RST then we send a connection close.
1017  ValueRestore<bool> old_flag(&FLAGS_close_quic_connection_unfinished_streams_2,
1018                              true);
1019
1020  EXPECT_CALL(*connection_,
1021              SendConnectionClose(QUIC_TOO_MANY_UNFINISHED_STREAMS)).Times(1);
1022
1023  const int kMaxStreams = 5;
1024  QuicSessionPeer::SetMaxOpenStreams(&session_, kMaxStreams);
1025
1026  // Create kMaxStreams + 1 data streams, and close them all without receiving a
1027  // FIN or a RST from the client.
1028  const int kFirstStreamId = kClientDataStreamId1;
1029  const int kFinalStreamId = kClientDataStreamId1 + 2 * kMaxStreams + 1;
1030  for (int i = kFirstStreamId; i < kFinalStreamId; i += 2) {
1031    QuicStreamFrame data1(i, false, 0, MakeIOVector("HT"));
1032    vector<QuicStreamFrame> frames;
1033    frames.push_back(data1);
1034    session_.OnStreamFrames(frames);
1035    EXPECT_EQ(1u, session_.GetNumOpenStreams());
1036    session_.CloseStream(i);
1037  }
1038
1039  // Called after any new data is received by the session, and triggers the call
1040  // to close the connection.
1041  session_.PostProcessAfterData();
1042}
1043
1044}  // namespace
1045}  // namespace test
1046}  // namespace net
1047