net/quic/quic_session_test.cc

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