blob: 164e911b30921a417f4117947ba61f14ab1f95a7 [file] [log] [blame]
// Copyright (c) 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/third_party/quiche/src/quic/core/quic_stream_id_manager.h"
#include <cstdint>
#include <set>
#include <string>
#include <utility>
#include "net/third_party/quiche/src/quic/core/crypto/crypto_protocol.h"
#include "net/third_party/quiche/src/quic/core/crypto/null_encrypter.h"
#include "net/third_party/quiche/src/quic/core/quic_crypto_stream.h"
#include "net/third_party/quiche/src/quic/core/quic_data_writer.h"
#include "net/third_party/quiche/src/quic/core/quic_packets.h"
#include "net/third_party/quiche/src/quic/core/quic_session.h"
#include "net/third_party/quiche/src/quic/core/quic_stream.h"
#include "net/third_party/quiche/src/quic/core/quic_utils.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_arraysize.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_expect_bug.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_flags.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_map_util.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_ptr_util.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_str_cat.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_string_piece.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_test.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_test_mem_slice_vector.h"
#include "net/third_party/quiche/src/quic/test_tools/quic_config_peer.h"
#include "net/third_party/quiche/src/quic/test_tools/quic_connection_peer.h"
#include "net/third_party/quiche/src/quic/test_tools/quic_flow_controller_peer.h"
#include "net/third_party/quiche/src/quic/test_tools/quic_session_peer.h"
#include "net/third_party/quiche/src/quic/test_tools/quic_stream_id_manager_peer.h"
#include "net/third_party/quiche/src/quic/test_tools/quic_stream_peer.h"
#include "net/third_party/quiche/src/quic/test_tools/quic_stream_send_buffer_peer.h"
#include "net/third_party/quiche/src/quic/test_tools/quic_test_utils.h"
using testing::_;
using testing::Invoke;
using testing::Return;
using testing::StrictMock;
namespace quic {
namespace test {
namespace {
class TestQuicStream : public QuicStream {
// TestQuicStream exists simply as a place to hang OnDataAvailable().
public:
TestQuicStream(QuicStreamId id, QuicSession* session, StreamType type)
: QuicStream(id, session, /*is_static=*/false, type) {}
void OnDataAvailable() override {}
};
class TestQuicSession : public MockQuicSession {
public:
TestQuicSession(QuicConnection* connection)
: MockQuicSession(connection, /*create_mock_crypto_stream=*/true) {
Initialize();
}
TestQuicStream* CreateIncomingStream(QuicStreamId id) override {
TestQuicStream* stream = new TestQuicStream(
id, this,
DetermineStreamType(id, connection()->transport_version(),
perspective(),
/*is_incoming=*/true, BIDIRECTIONAL));
ActivateStream(QuicWrapUnique(stream));
return stream;
}
bool SaveFrame(const QuicFrame& frame) {
save_frame_ = frame;
DeleteFrame(&const_cast<QuicFrame&>(frame));
return true;
}
const QuicFrame& save_frame() { return save_frame_; }
bool ClearControlFrame(const QuicFrame& frame) {
DeleteFrame(&const_cast<QuicFrame&>(frame));
return true;
}
TestQuicStream* CreateOutgoingBidirectionalStream() {
if (!CanOpenNextOutgoingBidirectionalStream()) {
return nullptr;
}
QuicStreamId id = GetNextOutgoingBidirectionalStreamId();
TestQuicStream* stream = new TestQuicStream(id, this, BIDIRECTIONAL);
ActivateStream(QuicWrapUnique(stream));
return stream;
}
TestQuicStream* CreateOutgoingUnidirectionalStream() {
if (!CanOpenNextOutgoingUnidirectionalStream()) {
return nullptr;
}
QuicStreamId id = GetNextOutgoingUnidirectionalStreamId();
TestQuicStream* stream = new TestQuicStream(id, this, WRITE_UNIDIRECTIONAL);
ActivateStream(QuicWrapUnique(stream));
return stream;
}
private:
QuicFrame save_frame_;
};
class QuicStreamIdManagerTestBase : public QuicTestWithParam<bool> {
protected:
explicit QuicStreamIdManagerTestBase(Perspective perspective)
: connection_(new StrictMock<MockQuicConnection>(
&helper_,
&alarm_factory_,
perspective,
ParsedQuicVersionVector(
{{PROTOCOL_QUIC_CRYPTO, QUIC_VERSION_99}}))) {
connection_->AdvanceTime(QuicTime::Delta::FromSeconds(1));
session_ = QuicMakeUnique<TestQuicSession>(connection_);
stream_id_manager_ =
IsBidi() ? QuicSessionPeer::v99_bidirectional_stream_id_manager(
session_.get())
: QuicSessionPeer::v99_unidirectional_stream_id_manager(
session_.get());
}
QuicTransportVersion transport_version() const {
return connection_->transport_version();
}
void CloseStream(QuicStreamId id) { session_->CloseStream(id); }
QuicStreamId GetNthClientInitiatedBidirectionalId(int n) {
return QuicUtils::GetFirstBidirectionalStreamId(
connection_->transport_version(), Perspective::IS_CLIENT) +
kV99StreamIdIncrement * n;
}
QuicStreamId GetNthClientInitiatedUnidirectionalId(int n) {
return QuicUtils::GetFirstUnidirectionalStreamId(
connection_->transport_version(), Perspective::IS_CLIENT) +
kV99StreamIdIncrement * n;
}
QuicStreamId GetNthServerInitiatedBidirectionalId(int n) {
return QuicUtils::GetFirstBidirectionalStreamId(
connection_->transport_version(), Perspective::IS_SERVER) +
kV99StreamIdIncrement * n;
}
QuicStreamId GetNthServerInitiatedUnidirectionalId(int n) {
return QuicUtils::GetFirstUnidirectionalStreamId(
connection_->transport_version(), Perspective::IS_SERVER) +
kV99StreamIdIncrement * n;
}
QuicStreamId StreamCountToId(QuicStreamCount stream_count,
Perspective perspective) {
// Calculate and build up stream ID rather than use
// GetFirst... because the tests that rely on this method
// needs to do the stream count where #1 is 0/1/2/3, and not
// take into account that stream 0 is special.
QuicStreamId id =
((stream_count - 1) * QuicUtils::StreamIdDelta(QUIC_VERSION_99));
if (IsUnidi()) {
id |= 0x2;
}
if (perspective == Perspective::IS_SERVER) {
id |= 0x1;
}
return id;
}
// GetParam returns true if the test is for bidirectional streams
bool IsUnidi() { return GetParam() ? false : true; }
bool IsBidi() { return GetParam(); }
MockQuicConnectionHelper helper_;
MockAlarmFactory alarm_factory_;
StrictMock<MockQuicConnection>* connection_;
std::unique_ptr<TestQuicSession> session_;
QuicStreamIdManager* stream_id_manager_;
};
// Following tests are either client-specific (they depend, in some way, on
// client-specific attributes, such as the initial stream ID) or are
// server/client independent (arbitrarily all such tests have been placed here).
class QuicStreamIdManagerTestClient : public QuicStreamIdManagerTestBase {
protected:
QuicStreamIdManagerTestClient()
: QuicStreamIdManagerTestBase(Perspective::IS_CLIENT) {}
};
INSTANTIATE_TEST_SUITE_P(Tests, QuicStreamIdManagerTestClient, testing::Bool());
// Check that the parameters used by the stream ID manager are properly
// initialized.
TEST_P(QuicStreamIdManagerTestClient, StreamIdManagerClientInitialization) {
// These fields are inited via the QuicSession constructor to default
// values defined as a constant.
// If bidi, Crypto stream default created at start up, it is one
// more stream to account for since initialization is "number of
// request/responses" & crypto is added in to that, not streams.
EXPECT_EQ(kDefaultMaxStreamsPerConnection + (GetParam() ? 1u : 0u),
stream_id_manager_->outgoing_max_streams());
// Test is predicated on having 1 static stream going if bidi, 0 if not...)
EXPECT_EQ((GetParam() ? 1u : 0u),
stream_id_manager_->outgoing_static_stream_count());
EXPECT_EQ(kDefaultMaxStreamsPerConnection,
stream_id_manager_->incoming_actual_max_streams());
EXPECT_EQ(kDefaultMaxStreamsPerConnection,
stream_id_manager_->incoming_advertised_max_streams());
EXPECT_EQ(kDefaultMaxStreamsPerConnection,
stream_id_manager_->incoming_initial_max_open_streams());
// The window for advertising updates to the MAX STREAM ID is half the number
// of streams allowed.
EXPECT_EQ(kDefaultMaxStreamsPerConnection / kMaxStreamsWindowDivisor,
stream_id_manager_->max_streams_window());
}
// This test checks that the stream advertisement window is set to 1
// if the number of stream ids is 1. This is a special case in the code.
TEST_P(QuicStreamIdManagerTestClient, CheckMaxStreamsWindow1) {
stream_id_manager_->SetMaxOpenIncomingStreams(1);
EXPECT_EQ(1u, stream_id_manager_->incoming_initial_max_open_streams());
EXPECT_EQ(1u, stream_id_manager_->incoming_actual_max_streams());
// If streamid_count/2==0 (integer math) force it to 1.
EXPECT_EQ(1u, stream_id_manager_->max_streams_window());
}
// Test that stream counts that would exceed the implementation maximum are
// safely handled.
// First, check that setting up to and including the implementation maximum
// is OK.
TEST_P(QuicStreamIdManagerTestClient, CheckMaxStreamsBadValuesToMaxOkOutgoing) {
QuicStreamCount implementation_max =
QuicUtils::GetMaxStreamCount(!GetParam(), /* GetParam==true for bidi */
Perspective::IS_CLIENT);
stream_id_manager_->AdjustMaxOpenOutgoingStreams(implementation_max - 1u);
// If bidi, Crypto stream default created at start up, it is one
// more stream to account for since initialization is "number of
// request/responses" & crypto is added in to that, not streams.
EXPECT_EQ(implementation_max - 1u + (GetParam() ? 1u : 0u),
stream_id_manager_->outgoing_max_streams());
stream_id_manager_->AdjustMaxOpenOutgoingStreams(implementation_max);
EXPECT_EQ(implementation_max, stream_id_manager_->outgoing_max_streams());
}
// Now check that setting to a value larger than the maximum fails.
TEST_P(QuicStreamIdManagerTestClient,
CheckMaxStreamsBadValuesOverMaxFailsOutgoing) {
QuicStreamCount implementation_max =
QuicUtils::GetMaxStreamCount(!GetParam(), /* GetParam==true for bidi */
Perspective::IS_CLIENT);
// Ensure that the limit is less than the implementation maximum.
EXPECT_LT(stream_id_manager_->outgoing_max_streams(), implementation_max);
// Try to go over.
stream_id_manager_->AdjustMaxOpenOutgoingStreams(implementation_max + 1);
// Should be pegged at the max.
EXPECT_EQ(implementation_max, stream_id_manager_->outgoing_max_streams());
}
// Now do the same for the incoming streams
TEST_P(QuicStreamIdManagerTestClient, CheckMaxStreamsBadValuesIncoming) {
QuicStreamCount implementation_max =
QuicUtils::GetMaxStreamCount(!GetParam(), /* GetParam==true for bidi */
Perspective::IS_CLIENT);
stream_id_manager_->SetMaxOpenIncomingStreams(implementation_max - 1u);
EXPECT_EQ(implementation_max - 1u,
stream_id_manager_->incoming_initial_max_open_streams());
EXPECT_EQ(implementation_max - 1u,
stream_id_manager_->incoming_actual_max_streams());
EXPECT_EQ((implementation_max - 1u) / 2u,
stream_id_manager_->max_streams_window());
stream_id_manager_->SetMaxOpenIncomingStreams(implementation_max);
EXPECT_EQ(implementation_max,
stream_id_manager_->incoming_initial_max_open_streams());
EXPECT_EQ(implementation_max,
stream_id_manager_->incoming_actual_max_streams());
EXPECT_EQ(implementation_max / 2, stream_id_manager_->max_streams_window());
// Reset to 1 so that we can detect the change.
stream_id_manager_->SetMaxOpenIncomingStreams(1u);
EXPECT_EQ(1u, stream_id_manager_->incoming_initial_max_open_streams());
EXPECT_EQ(1u, stream_id_manager_->incoming_actual_max_streams());
EXPECT_EQ(1u, stream_id_manager_->max_streams_window());
// Now try to exceed the max, without wrapping.
stream_id_manager_->SetMaxOpenIncomingStreams(implementation_max + 1);
EXPECT_EQ(implementation_max,
stream_id_manager_->incoming_initial_max_open_streams());
EXPECT_EQ(implementation_max,
stream_id_manager_->incoming_actual_max_streams());
EXPECT_EQ(implementation_max / 2u, stream_id_manager_->max_streams_window());
}
// Check the case of the stream count in a STREAMS_BLOCKED frame is less than
// the count most recently advertised in a MAX_STREAMS frame. This should cause
// a MAX_STREAMS frame with the most recently advertised count to be sent.
TEST_P(QuicStreamIdManagerTestClient, ProcessStreamsBlockedOk) {
EXPECT_CALL(*connection_, SendControlFrame(_))
.WillRepeatedly(Invoke(session_.get(), &TestQuicSession::SaveFrame));
QuicStreamCount stream_count =
stream_id_manager_->incoming_initial_max_open_streams() - 1;
QuicStreamsBlockedFrame frame(0, stream_count, /*unidirectional=*/false);
session_->OnStreamsBlockedFrame(frame);
// We should see a MAX_STREAMS frame.
EXPECT_EQ(MAX_STREAMS_FRAME, session_->save_frame().type);
// and it should advertise the current max-allowed value.
EXPECT_EQ(stream_id_manager_->incoming_initial_max_open_streams(),
session_->save_frame().max_streams_frame.stream_count);
}
// Check the case of the stream count in a STREAMS_BLOCKED frame is equal to the
// count most recently advertised in a MAX_STREAMS frame. No MAX_STREAMS
// should be generated.
TEST_P(QuicStreamIdManagerTestClient, ProcessStreamsBlockedNoOp) {
EXPECT_CALL(*connection_, SendControlFrame(_)).Times(0);
QuicStreamCount stream_count =
stream_id_manager_->incoming_initial_max_open_streams();
QuicStreamsBlockedFrame frame(0, stream_count, /*unidirectional=*/false);
session_->OnStreamsBlockedFrame(frame);
}
// Check the case of the stream count in a STREAMS_BLOCKED frame is greater than
// the count most recently advertised in a MAX_STREAMS frame. Expect a
// connection close with an error.
TEST_P(QuicStreamIdManagerTestClient, ProcessStreamsBlockedTooBig) {
EXPECT_CALL(*connection_, CloseConnection(QUIC_STREAMS_BLOCKED_ERROR, _, _));
EXPECT_CALL(*connection_, SendControlFrame(_)).Times(0);
QuicStreamCount stream_count =
stream_id_manager_->incoming_initial_max_open_streams() + 1;
QuicStreamsBlockedFrame frame(0, stream_count, /*unidirectional=*/false);
session_->OnStreamsBlockedFrame(frame);
}
// Same basic tests as above, but calls
// QuicStreamIdManager::MaybeIncreaseLargestPeerStreamId directly, avoiding the
// call chain. The intent is that if there is a problem, the following tests
// will point to either the stream ID manager or the call chain. They also
// provide specific, small scale, tests of a public QuicStreamIdManager method.
// First test make sure that streams with ids below the limit are accepted.
TEST_P(QuicStreamIdManagerTestClient, IsIncomingStreamIdValidBelowLimit) {
QuicStreamId stream_id =
StreamCountToId(stream_id_manager_->incoming_actual_max_streams() - 1,
Perspective::IS_CLIENT);
EXPECT_CALL(*connection_, CloseConnection(_, _, _)).Times(0);
EXPECT_TRUE(stream_id_manager_->MaybeIncreaseLargestPeerStreamId(stream_id));
}
// Accept a stream with an ID that equals the limit.
TEST_P(QuicStreamIdManagerTestClient, IsIncomingStreamIdValidAtLimit) {
QuicStreamId stream_id =
StreamCountToId(stream_id_manager_->incoming_actual_max_streams(),
Perspective::IS_CLIENT);
EXPECT_CALL(*connection_, CloseConnection(_, _, _)).Times(0);
EXPECT_TRUE(stream_id_manager_->MaybeIncreaseLargestPeerStreamId(stream_id));
}
// Close the connection if the id exceeds the limit.
TEST_P(QuicStreamIdManagerTestClient, IsIncomingStreamIdInValidAboveLimit) {
QuicStreamId stream_id = StreamCountToId(
stream_id_manager_->incoming_actual_max_streams() + 1,
Perspective::IS_SERVER); // This node is a client, incoming
// stream ids must be server-originated.
std::string error_details =
GetParam() ? "Stream id 401 would exceed stream count limit 100"
: "Stream id 403 would exceed stream count limit 100";
EXPECT_CALL(*connection_,
CloseConnection(QUIC_INVALID_STREAM_ID, error_details, _));
EXPECT_FALSE(stream_id_manager_->MaybeIncreaseLargestPeerStreamId(stream_id));
}
// Test functionality for reception of a MAX_STREAMS frame. This code is
// client/server-agnostic.
TEST_P(QuicStreamIdManagerTestClient, StreamIdManagerClientOnMaxStreamsFrame) {
// Get the current maximum allowed outgoing stream count.
QuicStreamCount initial_stream_count =
// need to know the number of request/response streams.
// This is the total number of outgoing streams (which includes both
// req/resp and statics) minus just the statics...
stream_id_manager_->outgoing_max_streams() -
stream_id_manager_->outgoing_static_stream_count();
QuicMaxStreamsFrame frame;
// Even though the stream count in the frame is < the initial maximum,
// it is should be ignored since the initial max was set via
// the constructor (an educated guess) and the MAX STREAMS frame
// is authoritative.
frame.stream_count = initial_stream_count - 1;
frame.unidirectional = IsUnidi();
EXPECT_TRUE(stream_id_manager_->OnMaxStreamsFrame(frame));
EXPECT_EQ(initial_stream_count - 1u,
stream_id_manager_->outgoing_max_streams());
QuicStreamCount save_outgoing_max_streams =
stream_id_manager_->outgoing_max_streams();
// Now that there has been one MAX STREAMS frame, we should not
// accept a MAX_STREAMS that reduces the limit...
frame.stream_count = initial_stream_count - 2;
frame.unidirectional = IsUnidi();
EXPECT_TRUE(stream_id_manager_->OnMaxStreamsFrame(frame));
// should not change from previous setting.
EXPECT_EQ(save_outgoing_max_streams,
stream_id_manager_->outgoing_max_streams());
// A stream count greater than the current limit should increase the limit.
frame.stream_count = initial_stream_count + 1;
EXPECT_TRUE(stream_id_manager_->OnMaxStreamsFrame(frame));
EXPECT_EQ(initial_stream_count + 1u,
stream_id_manager_->outgoing_max_streams());
}
// Test functionality for reception of a STREAMS_BLOCKED frame.
// This code is client/server-agnostic.
TEST_P(QuicStreamIdManagerTestClient, StreamIdManagerOnStreamsBlockedFrame) {
// Get the current maximum allowed incoming stream count.
QuicStreamCount advertised_stream_count =
stream_id_manager_->incoming_advertised_max_streams();
QuicStreamsBlockedFrame frame;
frame.unidirectional = IsUnidi();
// If the peer is saying it's blocked on the stream count that
// we've advertised, it's a noop since the peer has the correct information.
frame.stream_count = advertised_stream_count;
EXPECT_CALL(*connection_, SendControlFrame(_)).Times(0);
EXPECT_TRUE(stream_id_manager_->OnStreamsBlockedFrame(frame));
// If the peer is saying it's blocked on a stream count that is larger
// than what we've advertised, the connection should get closed.
frame.stream_count = advertised_stream_count + 1;
EXPECT_CALL(*connection_, CloseConnection(QUIC_STREAMS_BLOCKED_ERROR, _, _));
EXPECT_FALSE(stream_id_manager_->OnStreamsBlockedFrame(frame));
// If the peer is saying it's blocked on a count that is less than
// our actual count, we send a MAX_STREAMS frame and update
// the advertised value.
// First, need to bump up the actual max so there is room for the MAX
// STREAMS frame to send a larger ID.
QuicStreamCount actual_stream_count =
stream_id_manager_->incoming_actual_max_streams();
// Closing a stream will result in the ability to initiate one more
// stream
stream_id_manager_->OnStreamClosed(
QuicStreamIdManagerPeer::GetFirstIncomingStreamId(stream_id_manager_));
EXPECT_EQ(actual_stream_count + 1u,
stream_id_manager_->incoming_actual_max_streams());
EXPECT_EQ(stream_id_manager_->incoming_actual_max_streams(),
stream_id_manager_->incoming_advertised_max_streams() + 1u);
// Now simulate receiving a STREAMS_BLOCKED frame...
// Changing the actual maximum, above, forces a MAX_STREAMS frame to be
// sent, so the logic for that (SendMaxStreamsFrame(), etc) is tested.
// The STREAMS_BLOCKED frame contains the previous advertised count,
// not the one that the peer would have received as a result of the
// MAX_STREAMS sent earler.
frame.stream_count = advertised_stream_count;
EXPECT_CALL(*connection_, SendControlFrame(_))
.Times(1)
.WillRepeatedly(Invoke(session_.get(), &TestQuicSession::SaveFrame));
EXPECT_TRUE(stream_id_manager_->OnStreamsBlockedFrame(frame));
// Check that the saved frame is correct.
EXPECT_EQ(stream_id_manager_->incoming_actual_max_streams(),
stream_id_manager_->incoming_advertised_max_streams());
EXPECT_EQ(MAX_STREAMS_FRAME, session_->save_frame().type);
EXPECT_EQ(stream_id_manager_->incoming_advertised_max_streams(),
session_->save_frame().max_streams_frame.stream_count);
// Make sure that this is the only MAX_STREAMS
EXPECT_EQ(1u, GetControlFrameId(session_->save_frame()));
}
// Test GetNextOutgoingStream. This is client/server agnostic.
TEST_P(QuicStreamIdManagerTestClient, StreamIdManagerGetNextOutgoingStream) {
// Number of streams we can open and the first one we should get when
// opening...
int number_of_streams = kDefaultMaxStreamsPerConnection;
QuicStreamId stream_id =
IsUnidi() ? session_->next_outgoing_unidirectional_stream_id()
: session_->next_outgoing_bidirectional_stream_id();
// If bidi, Crypto stream default created at start up, it is one
// more stream to account for since initialization is "number of
// request/responses" & crypto is added in to that, not streams.
EXPECT_EQ(number_of_streams + (IsBidi() ? 1u : 0u),
stream_id_manager_->outgoing_max_streams());
while (number_of_streams) {
EXPECT_TRUE(stream_id_manager_->CanOpenNextOutgoingStream());
EXPECT_EQ(stream_id, stream_id_manager_->GetNextOutgoingStreamId());
stream_id += kV99StreamIdIncrement;
number_of_streams--;
}
// If we try to check that the next outgoing stream id is available it should
// A) fail and B) generate a STREAMS_BLOCKED frame.
EXPECT_CALL(*connection_, SendControlFrame(_))
.Times(1)
.WillRepeatedly(Invoke(session_.get(), &TestQuicSession::SaveFrame));
EXPECT_FALSE(stream_id_manager_->CanOpenNextOutgoingStream());
EXPECT_EQ(STREAMS_BLOCKED_FRAME, session_->save_frame().type);
// If bidi, Crypto stream default created at start up, it is one
// more stream to account for since initialization is "number of
// request/responses" & crypto is added in to that, not streams.
EXPECT_EQ(kDefaultMaxStreamsPerConnection + (IsBidi() ? 1u : 0u),
session_->save_frame().max_streams_frame.stream_count);
// If we try to get the next id (above the limit), it should cause a quic-bug.
EXPECT_QUIC_BUG(
stream_id_manager_->GetNextOutgoingStreamId(),
"Attempt to allocate a new outgoing stream that would exceed the limit");
}
// Ensure that MaybeIncreaseLargestPeerStreamId works properly. This is
// server/client agnostic.
TEST_P(QuicStreamIdManagerTestClient,
StreamIdManagerServerMaybeIncreaseLargestPeerStreamId) {
QuicStreamId max_stream_id =
StreamCountToId(stream_id_manager_->incoming_actual_max_streams(),
Perspective::IS_SERVER);
EXPECT_TRUE(
stream_id_manager_->MaybeIncreaseLargestPeerStreamId(max_stream_id));
QuicStreamId server_initiated_stream_id =
StreamCountToId(1u, // get 1st id
Perspective::IS_SERVER);
EXPECT_TRUE(stream_id_manager_->MaybeIncreaseLargestPeerStreamId(
server_initiated_stream_id));
// A bad stream ID results in a closed connection.
EXPECT_CALL(*connection_, CloseConnection(QUIC_INVALID_STREAM_ID, _, _));
EXPECT_FALSE(stream_id_manager_->MaybeIncreaseLargestPeerStreamId(
max_stream_id + kV99StreamIdIncrement));
}
// Test the MAX STREAMS Window functionality.
TEST_P(QuicStreamIdManagerTestClient, StreamIdManagerServerMaxStreams) {
// Test that a MAX_STREAMS frame is generated when the peer has less than
// |max_streams_window_| streams left that it can initiate.
// First, open, and then close, max_streams_window_ streams. This will
// max_streams_window_ streams available for the peer -- no MAX_STREAMS
// should be sent. The -1 is because the check in
// QuicStreamIdManager::MaybeSendMaxStreamsFrame sends a MAX_STREAMS if the
// number of available streams at the peer is <= |max_streams_window_|
int stream_count = stream_id_manager_->max_streams_window() - 1;
// Should not get a control-frame transmission since the peer should have
// "plenty" of stream IDs to use.
EXPECT_CALL(*connection_, SendControlFrame(_)).Times(0);
// Get the first incoming stream ID to try and allocate.
QuicStreamId stream_id = IsBidi() ? GetNthServerInitiatedBidirectionalId(0)
: GetNthServerInitiatedUnidirectionalId(0);
size_t old_available_incoming_streams =
stream_id_manager_->available_incoming_streams();
while (stream_count) {
EXPECT_TRUE(
stream_id_manager_->MaybeIncreaseLargestPeerStreamId(stream_id));
// This node should think that the peer believes it has one fewer
// stream it can create.
old_available_incoming_streams--;
EXPECT_EQ(old_available_incoming_streams,
stream_id_manager_->available_incoming_streams());
stream_count--;
stream_id += kV99StreamIdIncrement;
}
// Now close them, still should get no MAX_STREAMS
stream_count = stream_id_manager_->max_streams_window();
stream_id = IsBidi() ? GetNthServerInitiatedBidirectionalId(0)
: GetNthServerInitiatedUnidirectionalId(0);
QuicStreamCount expected_actual_max =
stream_id_manager_->incoming_actual_max_streams();
QuicStreamCount expected_advertised_max_streams =
stream_id_manager_->incoming_advertised_max_streams();
while (stream_count) {
stream_id_manager_->OnStreamClosed(stream_id);
stream_count--;
stream_id += kV99StreamIdIncrement;
expected_actual_max++;
EXPECT_EQ(expected_actual_max,
stream_id_manager_->incoming_actual_max_streams());
// Advertised maximum should remain the same.
EXPECT_EQ(expected_advertised_max_streams,
stream_id_manager_->incoming_advertised_max_streams());
}
// This should not change.
EXPECT_EQ(old_available_incoming_streams,
stream_id_manager_->available_incoming_streams());
// Now whenever we close a stream we should get a MAX_STREAMS frame.
// Above code closed all the open streams, so we have to open/close
EXPECT_CALL(*connection_, SendControlFrame(_))
.Times(1)
.WillRepeatedly(Invoke(session_.get(), &TestQuicSession::SaveFrame));
EXPECT_TRUE(stream_id_manager_->MaybeIncreaseLargestPeerStreamId(stream_id));
stream_id_manager_->OnStreamClosed(stream_id);
stream_id += kV99StreamIdIncrement;
// Check that the MAX STREAMS was sent and has the correct values.
EXPECT_EQ(MAX_STREAMS_FRAME, session_->save_frame().type);
EXPECT_EQ(stream_id_manager_->incoming_advertised_max_streams(),
session_->save_frame().max_streams_frame.stream_count);
}
// Test that registering static stream IDs causes the stream limit to rise
// accordingly. This is server/client agnostic.
TEST_P(QuicStreamIdManagerTestClient, TestStaticStreamAdjustment) {
QuicStreamId first_dynamic =
QuicStreamIdManagerPeer::GetFirstIncomingStreamId(stream_id_manager_);
QuicStreamCount actual_max =
stream_id_manager_->incoming_actual_max_streams();
// First test will register the first dynamic stream id as being for a static
// stream.
stream_id_manager_->RegisterStaticStream(first_dynamic);
// Should go up by 1 stream/stream id.
EXPECT_EQ(actual_max + 1u, stream_id_manager_->incoming_actual_max_streams());
}
// Check that the OnMaxStreamFrame logic properly handles all the
// cases of offered max streams and outgoing_static_stream_count_,
// checking for the wrap conditions. Tests in client perspective, necessary
// because internally, some calculations depend on the client/server
// perspective.
TEST_P(QuicStreamIdManagerTestClient, TestMaxStreamsWrapChecks) {
QuicStreamCount max_stream_count =
QuicUtils::GetMaxStreamCount(IsUnidi(), Perspective::IS_CLIENT);
QuicMaxStreamsFrame frame;
frame.unidirectional = IsUnidi();
// Check the case where the offered stream count is less than the
// maximum
frame.stream_count = max_stream_count - 10;
EXPECT_TRUE(stream_id_manager_->OnMaxStreamsFrame(frame));
EXPECT_EQ(max_stream_count - 10u, stream_id_manager_->outgoing_max_streams());
// Now check if the offered count is larger than the max.
// The count should be pegged at the max.
frame.stream_count = max_stream_count + 10;
EXPECT_TRUE(stream_id_manager_->OnMaxStreamsFrame(frame));
EXPECT_EQ(max_stream_count, stream_id_manager_->outgoing_max_streams());
}
// Check that edge conditions of the stream count in a STREAMS_BLOCKED frame
// are. properly handled.
TEST_P(QuicStreamIdManagerTestClient, StreamsBlockedEdgeConditions) {
QuicStreamsBlockedFrame frame;
frame.unidirectional = IsUnidi();
// Check that receipt of a STREAMS BLOCKED with stream-count = 0 does nothing
// when max_allowed_incoming_streams is 0.
EXPECT_CALL(*connection_, SendControlFrame(_)).Times(0);
stream_id_manager_->SetMaxOpenIncomingStreams(0);
frame.stream_count = 0;
stream_id_manager_->OnStreamsBlockedFrame(frame);
// Check that receipt of a STREAMS BLOCKED with stream-count = 0 invokes a
// MAX STREAMS, count = 123, when the MaxOpen... is set to 123.
EXPECT_CALL(*connection_, SendControlFrame(_))
.Times(1)
.WillOnce(Invoke(session_.get(), &TestQuicSession::SaveFrame));
stream_id_manager_->SetMaxOpenIncomingStreams(123);
frame.stream_count = 0;
stream_id_manager_->OnStreamsBlockedFrame(frame);
EXPECT_EQ(MAX_STREAMS_FRAME, session_->save_frame().type);
EXPECT_EQ(123u, session_->save_frame().max_streams_frame.stream_count);
}
// Following tests all are server-specific. They depend, in some way, on
// server-specific attributes, such as the initial stream ID.
class QuicStreamIdManagerTestServer : public QuicStreamIdManagerTestBase {
protected:
QuicStreamIdManagerTestServer()
: QuicStreamIdManagerTestBase(Perspective::IS_SERVER) {}
};
INSTANTIATE_TEST_SUITE_P(Tests, QuicStreamIdManagerTestServer, testing::Bool());
// This test checks that the initialization for the maximum allowed outgoing
// stream id is correct.
TEST_P(QuicStreamIdManagerTestServer, CheckMaxAllowedOutgoing) {
const size_t kIncomingStreamCount = 123;
stream_id_manager_->SetMaxOpenOutgoingStreams(kIncomingStreamCount);
EXPECT_EQ(kIncomingStreamCount, stream_id_manager_->outgoing_max_streams());
}
// Test that a MAX_STREAMS frame is generated when half the stream ids become
// available. This has a useful side effect of testing that when streams are
// closed, the number of available stream ids increases.
TEST_P(QuicStreamIdManagerTestServer, MaxStreamsSlidingWindow) {
// Ignore OnStreamReset calls.
EXPECT_CALL(*connection_, OnStreamReset(_, _)).WillRepeatedly(Return());
// Capture control frames for analysis.
EXPECT_CALL(*connection_, SendControlFrame(_))
.WillRepeatedly(Invoke(session_.get(), &TestQuicSession::SaveFrame));
// Simulate config being negotiated, causing the limits all to be initialized.
session_->OnConfigNegotiated();
QuicStreamCount first_advert =
stream_id_manager_->incoming_advertised_max_streams();
// Open/close enough streams to shrink the window without causing a MAX
// STREAMS to be generated. The window will open (and a MAX STREAMS generated)
// when max_streams_window() stream IDs have been made available. The loop
// will make that many stream IDs available, so the last CloseStream should
// cause a MAX STREAMS frame to be generated.
int i = static_cast<int>(stream_id_manager_->max_streams_window());
QuicStreamId id =
QuicStreamIdManagerPeer::GetFirstIncomingStreamId(stream_id_manager_);
while (i) {
QuicStream* stream = session_->GetOrCreateStream(id);
EXPECT_NE(nullptr, stream);
// have to set the stream's fin-received flag to true so that it
// does not go into the has-not-received-byte-offset state, leading
// to the stream being added to the locally_closed_streams_highest_offset_
// map, and therefore not counting as truly being closed. The test requires
// that the stream truly close, so that new streams become available,
// causing the MAX_STREAMS to be sent.
stream->set_fin_received(true);
EXPECT_EQ(id, stream->id());
if (IsBidi()) {
// Only send reset for incoming bidirectional streams.
EXPECT_CALL(*session_, SendRstStream(_, _, _));
}
CloseStream(stream->id());
i--;
id += kV99StreamIdIncrement;
}
EXPECT_EQ(MAX_STREAMS_FRAME, session_->save_frame().type);
QuicStreamCount second_advert =
session_->save_frame().max_streams_frame.stream_count;
EXPECT_EQ(first_advert + stream_id_manager_->max_streams_window(),
second_advert);
}
// Tast that an attempt to create an outgoing stream does not exceed the limit
// and that it generates an appropriate STREAMS_BLOCKED frame.
TEST_P(QuicStreamIdManagerTestServer, NewStreamDoesNotExceedLimit) {
size_t stream_count = stream_id_manager_->outgoing_max_streams();
EXPECT_NE(0u, stream_count);
TestQuicStream* stream;
while (stream_count) {
stream = IsBidi() ? session_->CreateOutgoingBidirectionalStream()
: session_->CreateOutgoingUnidirectionalStream();
EXPECT_NE(stream, nullptr);
stream_count--;
}
EXPECT_EQ(stream_id_manager_->outgoing_stream_count(),
stream_id_manager_->outgoing_max_streams());
// Create another, it should fail. Should also send a STREAMS_BLOCKED
// control frame.
EXPECT_CALL(*connection_, SendControlFrame(_));
stream = IsBidi() ? session_->CreateOutgoingBidirectionalStream()
: session_->CreateOutgoingUnidirectionalStream();
EXPECT_EQ(nullptr, stream);
}
// Check that the parameters used by the stream ID manager are properly
// initialized
TEST_P(QuicStreamIdManagerTestServer, StreamIdManagerServerInitialization) {
// These fields are inited via the QuicSession constructor to default
// values defined as a constant.
EXPECT_EQ(kDefaultMaxStreamsPerConnection,
stream_id_manager_->incoming_initial_max_open_streams());
// If bidi, Crypto stream default created at start up, it is one
// more stream to account for since initialization is "number of
// request/responses" & crypto is added in to that, not streams.
// Since this is the server, the stream is incoming.
EXPECT_EQ(kDefaultMaxStreamsPerConnection + (IsBidi() ? 1u : 0u),
stream_id_manager_->incoming_actual_max_streams());
EXPECT_EQ(kDefaultMaxStreamsPerConnection,
stream_id_manager_->outgoing_max_streams());
// The window for advertising updates to the MAX STREAM ID is half the number
// of stream allowed.
EXPECT_EQ(kDefaultMaxStreamsPerConnection / kMaxStreamsWindowDivisor,
stream_id_manager_->max_streams_window());
}
TEST_P(QuicStreamIdManagerTestServer, AvailableStreams) {
stream_id_manager_->MaybeIncreaseLargestPeerStreamId(
IsBidi() ? GetNthClientInitiatedBidirectionalId(3)
: GetNthClientInitiatedUnidirectionalId(3));
EXPECT_TRUE(stream_id_manager_->IsAvailableStream(
IsBidi() ? GetNthClientInitiatedBidirectionalId(1)
: GetNthClientInitiatedUnidirectionalId(1)));
EXPECT_TRUE(stream_id_manager_->IsAvailableStream(
IsBidi() ? GetNthClientInitiatedBidirectionalId(2)
: GetNthClientInitiatedUnidirectionalId(2)));
}
// Tests that if MaybeIncreaseLargestPeerStreamId is given an extremely
// large stream ID (larger than the limit) it is rejected.
// This is a regression for Chromium bugs 909987 and 910040
TEST_P(QuicStreamIdManagerTestServer, ExtremeMaybeIncreaseLargestPeerStreamId) {
QuicStreamId too_big_stream_id = StreamCountToId(
stream_id_manager_->incoming_actual_max_streams() + 20,
Perspective::IS_CLIENT); // This node is a server, incoming stream
// ids must be client-originated.
std::string error_details =
IsBidi() ? "Stream id 480 would exceed stream count limit 101"
: "Stream id 478 would exceed stream count limit 100";
EXPECT_CALL(*connection_,
CloseConnection(QUIC_INVALID_STREAM_ID, error_details, _));
EXPECT_FALSE(
stream_id_manager_->MaybeIncreaseLargestPeerStreamId(too_big_stream_id));
}
// Check that the OnMaxStreamFrame logic properly handles all the
// cases of offered max streams and outgoing_static_stream_count_,
// checking for the wrap conditions. Tests in server perspective, necessary
// because internally, some calculations depend on the client/server
// perspective.
TEST_P(QuicStreamIdManagerTestServer, TestMaxStreamsWrapChecks) {
QuicStreamCount max_stream_count =
QuicUtils::GetMaxStreamCount(IsUnidi(), Perspective::IS_SERVER);
QuicMaxStreamsFrame frame;
frame.unidirectional = IsUnidi();
// Check the case where the offered stream count is less than the
// implementation maximum,
frame.stream_count = max_stream_count - 10;
EXPECT_TRUE(stream_id_manager_->OnMaxStreamsFrame(frame));
EXPECT_EQ(max_stream_count - 10u, stream_id_manager_->outgoing_max_streams());
// Check the case where the offered stream count is greater than the
// implementation maximum. The count should peg at the maximum.
frame.stream_count = max_stream_count + 10;
EXPECT_TRUE(stream_id_manager_->OnMaxStreamsFrame(frame));
EXPECT_EQ(max_stream_count, stream_id_manager_->outgoing_max_streams());
}
} // namespace
} // namespace test
} // namespace quic