blob: fe851fdd5de282aac17486c3203f06361f97b3d8 [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/third_party/quiche/src/quic/core/quic_connection.h"
#include <errno.h>
#include <memory>
#include <ostream>
#include <utility>
#include "base/macros.h"
#include "net/third_party/quiche/src/quic/core/congestion_control/loss_detection_interface.h"
#include "net/third_party/quiche/src/quic/core/congestion_control/send_algorithm_interface.h"
#include "net/third_party/quiche/src/quic/core/crypto/null_encrypter.h"
#include "net/third_party/quiche/src/quic/core/crypto/quic_decrypter.h"
#include "net/third_party/quiche/src/quic/core/crypto/quic_encrypter.h"
#include "net/third_party/quiche/src/quic/core/quic_packets.h"
#include "net/third_party/quiche/src/quic/core/quic_simple_buffer_allocator.h"
#include "net/third_party/quiche/src/quic/core/quic_types.h"
#include "net/third_party/quiche/src/quic/core/quic_utils.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_logging.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_ptr_util.h"
#include "net/third_party/quiche/src/quic/platform/api/quic_reference_counted.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.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/test_tools/mock_clock.h"
#include "net/third_party/quiche/src/quic/test_tools/mock_random.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_framer_peer.h"
#include "net/third_party/quiche/src/quic/test_tools/quic_packet_creator_peer.h"
#include "net/third_party/quiche/src/quic/test_tools/quic_packet_generator_peer.h"
#include "net/third_party/quiche/src/quic/test_tools/quic_sent_packet_manager_peer.h"
#include "net/third_party/quiche/src/quic/test_tools/quic_test_utils.h"
#include "net/third_party/quiche/src/quic/test_tools/simple_data_producer.h"
#include "net/third_party/quiche/src/quic/test_tools/simple_quic_framer.h"
#include "net/third_party/quiche/src/quic/test_tools/simple_session_notifier.h"
using testing::_;
using testing::AnyNumber;
using testing::AtLeast;
using testing::DoAll;
using testing::Exactly;
using testing::Ge;
using testing::IgnoreResult;
using testing::InSequence;
using testing::Invoke;
using testing::InvokeWithoutArgs;
using testing::Lt;
using testing::Ref;
using testing::Return;
using testing::SaveArg;
using testing::SetArgPointee;
using testing::StrictMock;
namespace quic {
namespace test {
namespace {
const char data1[] = "foo";
const char data2[] = "bar";
const bool kHasStopWaiting = true;
const int kDefaultRetransmissionTimeMs = 500;
const QuicSocketAddress kPeerAddress =
QuicSocketAddress(QuicIpAddress::Loopback6(),
/*port=*/12345);
const QuicSocketAddress kSelfAddress =
QuicSocketAddress(QuicIpAddress::Loopback6(),
/*port=*/443);
Perspective InvertPerspective(Perspective perspective) {
return perspective == Perspective::IS_CLIENT ? Perspective::IS_SERVER
: Perspective::IS_CLIENT;
}
QuicStreamId GetNthClientInitiatedStreamId(int n,
QuicTransportVersion version) {
return QuicUtils::GetHeadersStreamId(version) + n * 2;
}
// TaggingEncrypter appends kTagSize bytes of |tag| to the end of each message.
class TaggingEncrypter : public QuicEncrypter {
public:
explicit TaggingEncrypter(uint8_t tag) : tag_(tag) {}
TaggingEncrypter(const TaggingEncrypter&) = delete;
TaggingEncrypter& operator=(const TaggingEncrypter&) = delete;
~TaggingEncrypter() override {}
// QuicEncrypter interface.
bool SetKey(QuicStringPiece key) override { return true; }
bool SetNoncePrefix(QuicStringPiece nonce_prefix) override { return true; }
bool SetIV(QuicStringPiece iv) override { return true; }
bool EncryptPacket(QuicTransportVersion /*version*/,
uint64_t packet_number,
QuicStringPiece associated_data,
QuicStringPiece plaintext,
char* output,
size_t* output_length,
size_t max_output_length) override {
const size_t len = plaintext.size() + kTagSize;
if (max_output_length < len) {
return false;
}
// Memmove is safe for inplace encryption.
memmove(output, plaintext.data(), plaintext.size());
output += plaintext.size();
memset(output, tag_, kTagSize);
*output_length = len;
return true;
}
size_t GetKeySize() const override { return 0; }
size_t GetNoncePrefixSize() const override { return 0; }
size_t GetIVSize() const override { return 0; }
size_t GetMaxPlaintextSize(size_t ciphertext_size) const override {
return ciphertext_size - kTagSize;
}
size_t GetCiphertextSize(size_t plaintext_size) const override {
return plaintext_size + kTagSize;
}
QuicStringPiece GetKey() const override { return QuicStringPiece(); }
QuicStringPiece GetNoncePrefix() const override { return QuicStringPiece(); }
private:
enum {
kTagSize = 12,
};
const uint8_t tag_;
};
// TaggingDecrypter ensures that the final kTagSize bytes of the message all
// have the same value and then removes them.
class TaggingDecrypter : public QuicDecrypter {
public:
~TaggingDecrypter() override {}
// QuicDecrypter interface
bool SetKey(QuicStringPiece key) override { return true; }
bool SetNoncePrefix(QuicStringPiece nonce_prefix) override { return true; }
bool SetIV(QuicStringPiece iv) override { return true; }
bool SetPreliminaryKey(QuicStringPiece key) override {
QUIC_BUG << "should not be called";
return false;
}
bool SetDiversificationNonce(const DiversificationNonce& key) override {
return true;
}
bool DecryptPacket(QuicTransportVersion /*version*/,
uint64_t packet_number,
QuicStringPiece associated_data,
QuicStringPiece ciphertext,
char* output,
size_t* output_length,
size_t max_output_length) override {
if (ciphertext.size() < kTagSize) {
return false;
}
if (!CheckTag(ciphertext, GetTag(ciphertext))) {
return false;
}
*output_length = ciphertext.size() - kTagSize;
memcpy(output, ciphertext.data(), *output_length);
return true;
}
size_t GetKeySize() const override { return 0; }
size_t GetIVSize() const override { return 0; }
QuicStringPiece GetKey() const override { return QuicStringPiece(); }
QuicStringPiece GetNoncePrefix() const override { return QuicStringPiece(); }
// Use a distinct value starting with 0xFFFFFF, which is never used by TLS.
uint32_t cipher_id() const override { return 0xFFFFFFF0; }
protected:
virtual uint8_t GetTag(QuicStringPiece ciphertext) {
return ciphertext.data()[ciphertext.size() - 1];
}
private:
enum {
kTagSize = 12,
};
bool CheckTag(QuicStringPiece ciphertext, uint8_t tag) {
for (size_t i = ciphertext.size() - kTagSize; i < ciphertext.size(); i++) {
if (ciphertext.data()[i] != tag) {
return false;
}
}
return true;
}
};
// StringTaggingDecrypter ensures that the final kTagSize bytes of the message
// match the expected value.
class StrictTaggingDecrypter : public TaggingDecrypter {
public:
explicit StrictTaggingDecrypter(uint8_t tag) : tag_(tag) {}
~StrictTaggingDecrypter() override {}
// TaggingQuicDecrypter
uint8_t GetTag(QuicStringPiece ciphertext) override { return tag_; }
// Use a distinct value starting with 0xFFFFFF, which is never used by TLS.
uint32_t cipher_id() const override { return 0xFFFFFFF1; }
private:
const uint8_t tag_;
};
class TestConnectionHelper : public QuicConnectionHelperInterface {
public:
TestConnectionHelper(MockClock* clock, MockRandom* random_generator)
: clock_(clock), random_generator_(random_generator) {
clock_->AdvanceTime(QuicTime::Delta::FromSeconds(1));
}
TestConnectionHelper(const TestConnectionHelper&) = delete;
TestConnectionHelper& operator=(const TestConnectionHelper&) = delete;
// QuicConnectionHelperInterface
const QuicClock* GetClock() const override { return clock_; }
QuicRandom* GetRandomGenerator() override { return random_generator_; }
QuicBufferAllocator* GetStreamSendBufferAllocator() override {
return &buffer_allocator_;
}
private:
MockClock* clock_;
MockRandom* random_generator_;
SimpleBufferAllocator buffer_allocator_;
};
class TestAlarmFactory : public QuicAlarmFactory {
public:
class TestAlarm : public QuicAlarm {
public:
explicit TestAlarm(QuicArenaScopedPtr<QuicAlarm::Delegate> delegate)
: QuicAlarm(std::move(delegate)) {}
void SetImpl() override {}
void CancelImpl() override {}
using QuicAlarm::Fire;
};
TestAlarmFactory() {}
TestAlarmFactory(const TestAlarmFactory&) = delete;
TestAlarmFactory& operator=(const TestAlarmFactory&) = delete;
QuicAlarm* CreateAlarm(QuicAlarm::Delegate* delegate) override {
return new TestAlarm(QuicArenaScopedPtr<QuicAlarm::Delegate>(delegate));
}
QuicArenaScopedPtr<QuicAlarm> CreateAlarm(
QuicArenaScopedPtr<QuicAlarm::Delegate> delegate,
QuicConnectionArena* arena) override {
return arena->New<TestAlarm>(std::move(delegate));
}
};
class TestPacketWriter : public QuicPacketWriter {
public:
TestPacketWriter(ParsedQuicVersion version, MockClock* clock)
: version_(version),
framer_(SupportedVersions(version_), Perspective::IS_SERVER),
last_packet_size_(0),
write_blocked_(false),
write_should_fail_(false),
block_on_next_flush_(false),
block_on_next_write_(false),
next_packet_too_large_(false),
always_get_packet_too_large_(false),
is_write_blocked_data_buffered_(false),
is_batch_mode_(false),
final_bytes_of_last_packet_(0),
final_bytes_of_previous_packet_(0),
use_tagging_decrypter_(false),
packets_write_attempts_(0),
clock_(clock),
write_pause_time_delta_(QuicTime::Delta::Zero()),
max_packet_size_(kMaxPacketSize),
supports_release_time_(false) {}
TestPacketWriter(const TestPacketWriter&) = delete;
TestPacketWriter& operator=(const TestPacketWriter&) = delete;
// QuicPacketWriter interface
WriteResult WritePacket(const char* buffer,
size_t buf_len,
const QuicIpAddress& self_address,
const QuicSocketAddress& peer_address,
PerPacketOptions* options) override {
QuicEncryptedPacket packet(buffer, buf_len);
++packets_write_attempts_;
if (packet.length() >= sizeof(final_bytes_of_last_packet_)) {
final_bytes_of_previous_packet_ = final_bytes_of_last_packet_;
memcpy(&final_bytes_of_last_packet_, packet.data() + packet.length() - 4,
sizeof(final_bytes_of_last_packet_));
}
if (use_tagging_decrypter_) {
framer_.framer()->SetDecrypter(ENCRYPTION_NONE,
QuicMakeUnique<TaggingDecrypter>());
}
EXPECT_TRUE(framer_.ProcessPacket(packet));
if (block_on_next_write_) {
write_blocked_ = true;
block_on_next_write_ = false;
}
if (next_packet_too_large_) {
next_packet_too_large_ = false;
return WriteResult(WRITE_STATUS_ERROR, EMSGSIZE);
}
if (always_get_packet_too_large_) {
return WriteResult(WRITE_STATUS_ERROR, EMSGSIZE);
}
if (IsWriteBlocked()) {
return WriteResult(is_write_blocked_data_buffered_
? WRITE_STATUS_BLOCKED_DATA_BUFFERED
: WRITE_STATUS_BLOCKED,
0);
}
if (ShouldWriteFail()) {
return WriteResult(WRITE_STATUS_ERROR, 0);
}
last_packet_size_ = packet.length();
last_packet_header_ = framer_.header();
if (!write_pause_time_delta_.IsZero()) {
clock_->AdvanceTime(write_pause_time_delta_);
}
return WriteResult(WRITE_STATUS_OK, last_packet_size_);
}
bool IsWriteBlockedDataBuffered() const override {
return is_write_blocked_data_buffered_;
}
bool ShouldWriteFail() { return write_should_fail_; }
bool IsWriteBlocked() const override { return write_blocked_; }
void SetWriteBlocked() { write_blocked_ = true; }
void SetWritable() override { write_blocked_ = false; }
void SetShouldWriteFail() { write_should_fail_ = true; }
QuicByteCount GetMaxPacketSize(
const QuicSocketAddress& /*peer_address*/) const override {
return max_packet_size_;
}
bool SupportsReleaseTime() const { return supports_release_time_; }
bool IsBatchMode() const override { return is_batch_mode_; }
char* GetNextWriteLocation(const QuicIpAddress& self_address,
const QuicSocketAddress& peer_address) override {
return nullptr;
}
WriteResult Flush() override {
if (block_on_next_flush_) {
block_on_next_flush_ = false;
SetWriteBlocked();
return WriteResult(WRITE_STATUS_BLOCKED, /*errno*/ -1);
}
return WriteResult(WRITE_STATUS_OK, 0);
}
void BlockOnNextFlush() { block_on_next_flush_ = true; }
void BlockOnNextWrite() { block_on_next_write_ = true; }
void SimulateNextPacketTooLarge() { next_packet_too_large_ = true; }
void AlwaysGetPacketTooLarge() { always_get_packet_too_large_ = true; }
// Sets the amount of time that the writer should before the actual write.
void SetWritePauseTimeDelta(QuicTime::Delta delta) {
write_pause_time_delta_ = delta;
}
void SetBatchMode(bool new_value) { is_batch_mode_ = new_value; }
const QuicPacketHeader& header() { return framer_.header(); }
size_t frame_count() const { return framer_.num_frames(); }
const std::vector<QuicAckFrame>& ack_frames() const {
return framer_.ack_frames();
}
const std::vector<QuicStopWaitingFrame>& stop_waiting_frames() const {
return framer_.stop_waiting_frames();
}
const std::vector<QuicConnectionCloseFrame>& connection_close_frames() const {
return framer_.connection_close_frames();
}
const std::vector<QuicRstStreamFrame>& rst_stream_frames() const {
return framer_.rst_stream_frames();
}
const std::vector<std::unique_ptr<QuicStreamFrame>>& stream_frames() const {
return framer_.stream_frames();
}
const std::vector<QuicPingFrame>& ping_frames() const {
return framer_.ping_frames();
}
const std::vector<QuicMessageFrame>& message_frames() const {
return framer_.message_frames();
}
const std::vector<QuicWindowUpdateFrame>& window_update_frames() const {
return framer_.window_update_frames();
}
const std::vector<QuicPaddingFrame>& padding_frames() const {
return framer_.padding_frames();
}
const std::vector<QuicPathChallengeFrame>& path_challenge_frames() const {
return framer_.path_challenge_frames();
}
const std::vector<QuicPathResponseFrame>& path_response_frames() const {
return framer_.path_response_frames();
}
size_t last_packet_size() { return last_packet_size_; }
const QuicPacketHeader& last_packet_header() const {
return last_packet_header_;
}
const QuicVersionNegotiationPacket* version_negotiation_packet() {
return framer_.version_negotiation_packet();
}
void set_is_write_blocked_data_buffered(bool buffered) {
is_write_blocked_data_buffered_ = buffered;
}
void set_perspective(Perspective perspective) {
// We invert perspective here, because the framer needs to parse packets
// we send.
QuicFramerPeer::SetPerspective(framer_.framer(),
InvertPerspective(perspective));
}
// final_bytes_of_last_packet_ returns the last four bytes of the previous
// packet as a little-endian, uint32_t. This is intended to be used with a
// TaggingEncrypter so that tests can determine which encrypter was used for
// a given packet.
uint32_t final_bytes_of_last_packet() { return final_bytes_of_last_packet_; }
// Returns the final bytes of the second to last packet.
uint32_t final_bytes_of_previous_packet() {
return final_bytes_of_previous_packet_;
}
void use_tagging_decrypter() { use_tagging_decrypter_ = true; }
uint32_t packets_write_attempts() { return packets_write_attempts_; }
void Reset() { framer_.Reset(); }
void SetSupportedVersions(const ParsedQuicVersionVector& versions) {
framer_.SetSupportedVersions(versions);
}
void set_max_packet_size(QuicByteCount max_packet_size) {
max_packet_size_ = max_packet_size;
}
void set_supports_release_time(bool supports_release_time) {
supports_release_time_ = supports_release_time;
}
SimpleQuicFramer* framer() { return &framer_; }
private:
ParsedQuicVersion version_;
SimpleQuicFramer framer_;
size_t last_packet_size_;
QuicPacketHeader last_packet_header_;
bool write_blocked_;
bool write_should_fail_;
bool block_on_next_flush_;
bool block_on_next_write_;
bool next_packet_too_large_;
bool always_get_packet_too_large_;
bool is_write_blocked_data_buffered_;
bool is_batch_mode_;
uint32_t final_bytes_of_last_packet_;
uint32_t final_bytes_of_previous_packet_;
bool use_tagging_decrypter_;
uint32_t packets_write_attempts_;
MockClock* clock_;
// If non-zero, the clock will pause during WritePacket for this amount of
// time.
QuicTime::Delta write_pause_time_delta_;
QuicByteCount max_packet_size_;
bool supports_release_time_;
};
class TestConnection : public QuicConnection {
public:
TestConnection(QuicConnectionId connection_id,
QuicSocketAddress address,
TestConnectionHelper* helper,
TestAlarmFactory* alarm_factory,
TestPacketWriter* writer,
Perspective perspective,
ParsedQuicVersion version)
: QuicConnection(connection_id,
address,
helper,
alarm_factory,
writer,
/* owns_writer= */ false,
perspective,
SupportedVersions(version)),
notifier_(nullptr) {
writer->set_perspective(perspective);
SetEncrypter(ENCRYPTION_FORWARD_SECURE,
QuicMakeUnique<NullEncrypter>(perspective));
SetDataProducer(&producer_);
}
TestConnection(const TestConnection&) = delete;
TestConnection& operator=(const TestConnection&) = delete;
void SendAck() { QuicConnectionPeer::SendAck(this); }
void SetSendAlgorithm(SendAlgorithmInterface* send_algorithm) {
QuicConnectionPeer::SetSendAlgorithm(this, send_algorithm);
}
void SetLossAlgorithm(LossDetectionInterface* loss_algorithm) {
QuicConnectionPeer::SetLossAlgorithm(this, loss_algorithm);
}
void SendPacket(EncryptionLevel level,
uint64_t packet_number,
std::unique_ptr<QuicPacket> packet,
HasRetransmittableData retransmittable,
bool has_ack,
bool has_pending_frames) {
char buffer[kMaxPacketSize];
size_t encrypted_length =
QuicConnectionPeer::GetFramer(this)->EncryptPayload(
ENCRYPTION_NONE, QuicPacketNumber(packet_number), *packet, buffer,
kMaxPacketSize);
SerializedPacket serialized_packet(
QuicPacketNumber(packet_number), PACKET_4BYTE_PACKET_NUMBER, buffer,
encrypted_length, has_ack, has_pending_frames);
if (retransmittable == HAS_RETRANSMITTABLE_DATA) {
serialized_packet.retransmittable_frames.push_back(
QuicFrame(QuicStreamFrame()));
}
OnSerializedPacket(&serialized_packet);
}
QuicConsumedData SaveAndSendStreamData(QuicStreamId id,
const struct iovec* iov,
int iov_count,
size_t total_length,
QuicStreamOffset offset,
StreamSendingState state) {
ScopedPacketFlusher flusher(this, NO_ACK);
producer_.SaveStreamData(id, iov, iov_count, 0u, total_length);
if (notifier_ != nullptr) {
return notifier_->WriteOrBufferData(id, total_length, state);
}
return QuicConnection::SendStreamData(id, total_length, offset, state);
}
QuicConsumedData SendStreamDataWithString(QuicStreamId id,
QuicStringPiece data,
QuicStreamOffset offset,
StreamSendingState state) {
ScopedPacketFlusher flusher(this, NO_ACK);
if (id != QuicUtils::GetCryptoStreamId(transport_version()) &&
this->encryption_level() == ENCRYPTION_NONE) {
this->SetDefaultEncryptionLevel(ENCRYPTION_FORWARD_SECURE);
}
struct iovec iov;
MakeIOVector(data, &iov);
return SaveAndSendStreamData(id, &iov, 1, data.length(), offset, state);
}
QuicConsumedData SendStreamData3() {
return SendStreamDataWithString(
GetNthClientInitiatedStreamId(1, transport_version()), "food", 0,
NO_FIN);
}
QuicConsumedData SendStreamData5() {
return SendStreamDataWithString(
GetNthClientInitiatedStreamId(2, transport_version()), "food2", 0,
NO_FIN);
}
// Ensures the connection can write stream data before writing.
QuicConsumedData EnsureWritableAndSendStreamData5() {
EXPECT_TRUE(CanWriteStreamData());
return SendStreamData5();
}
// The crypto stream has special semantics so that it is not blocked by a
// congestion window limitation, and also so that it gets put into a separate
// packet (so that it is easier to reason about a crypto frame not being
// split needlessly across packet boundaries). As a result, we have separate
// tests for some cases for this stream.
QuicConsumedData SendCryptoStreamData() {
return SendStreamDataWithString(
QuicUtils::GetCryptoStreamId(transport_version()), "chlo", 0, NO_FIN);
}
void set_version(ParsedQuicVersion version) {
QuicConnectionPeer::GetFramer(this)->set_version(version);
}
void SetSupportedVersions(const ParsedQuicVersionVector& versions) {
QuicConnectionPeer::GetFramer(this)->SetSupportedVersions(versions);
QuicConnectionPeer::SetNoVersionNegotiation(this, versions.size() == 1);
writer()->SetSupportedVersions(versions);
}
void set_perspective(Perspective perspective) {
writer()->set_perspective(perspective);
QuicConnectionPeer::SetPerspective(this, perspective);
}
// Enable path MTU discovery. Assumes that the test is performed from the
// client perspective and the higher value of MTU target is used.
void EnablePathMtuDiscovery(MockSendAlgorithm* send_algorithm) {
ASSERT_EQ(Perspective::IS_CLIENT, perspective());
QuicConfig config;
QuicTagVector connection_options;
connection_options.push_back(kMTUH);
config.SetConnectionOptionsToSend(connection_options);
EXPECT_CALL(*send_algorithm, SetFromConfig(_, _));
SetFromConfig(config);
// Normally, the pacing would be disabled in the test, but calling
// SetFromConfig enables it. Set nearly-infinite bandwidth to make the
// pacing algorithm work.
EXPECT_CALL(*send_algorithm, PacingRate(_))
.WillRepeatedly(Return(QuicBandwidth::Infinite()));
}
TestAlarmFactory::TestAlarm* GetAckAlarm() {
return reinterpret_cast<TestAlarmFactory::TestAlarm*>(
QuicConnectionPeer::GetAckAlarm(this));
}
TestAlarmFactory::TestAlarm* GetPingAlarm() {
return reinterpret_cast<TestAlarmFactory::TestAlarm*>(
QuicConnectionPeer::GetPingAlarm(this));
}
TestAlarmFactory::TestAlarm* GetRetransmissionAlarm() {
return reinterpret_cast<TestAlarmFactory::TestAlarm*>(
QuicConnectionPeer::GetRetransmissionAlarm(this));
}
TestAlarmFactory::TestAlarm* GetSendAlarm() {
return reinterpret_cast<TestAlarmFactory::TestAlarm*>(
QuicConnectionPeer::GetSendAlarm(this));
}
TestAlarmFactory::TestAlarm* GetTimeoutAlarm() {
return reinterpret_cast<TestAlarmFactory::TestAlarm*>(
QuicConnectionPeer::GetTimeoutAlarm(this));
}
TestAlarmFactory::TestAlarm* GetMtuDiscoveryAlarm() {
return reinterpret_cast<TestAlarmFactory::TestAlarm*>(
QuicConnectionPeer::GetMtuDiscoveryAlarm(this));
}
TestAlarmFactory::TestAlarm* GetPathDegradingAlarm() {
return reinterpret_cast<TestAlarmFactory::TestAlarm*>(
QuicConnectionPeer::GetPathDegradingAlarm(this));
}
TestAlarmFactory::TestAlarm* GetProcessUndecryptablePacketsAlarm() {
return reinterpret_cast<TestAlarmFactory::TestAlarm*>(
QuicConnectionPeer::GetProcessUndecryptablePacketsAlarm(this));
}
void SetMaxTailLossProbes(size_t max_tail_loss_probes) {
QuicSentPacketManagerPeer::SetMaxTailLossProbes(
QuicConnectionPeer::GetSentPacketManager(this), max_tail_loss_probes);
}
QuicByteCount GetBytesInFlight() {
return QuicSentPacketManagerPeer::GetBytesInFlight(
QuicConnectionPeer::GetSentPacketManager(this));
}
void set_notifier(SimpleSessionNotifier* notifier) { notifier_ = notifier; }
void ReturnEffectivePeerAddressForNextPacket(const QuicSocketAddress& addr) {
next_effective_peer_addr_ = QuicMakeUnique<QuicSocketAddress>(addr);
}
using QuicConnection::active_effective_peer_migration_type;
using QuicConnection::IsCurrentPacketConnectivityProbing;
using QuicConnection::SelectMutualVersion;
using QuicConnection::SendProbingRetransmissions;
using QuicConnection::set_defer_send_in_response_to_packets;
protected:
QuicSocketAddress GetEffectivePeerAddressFromCurrentPacket() const override {
if (next_effective_peer_addr_) {
return *std::move(next_effective_peer_addr_);
}
return QuicConnection::GetEffectivePeerAddressFromCurrentPacket();
}
private:
TestPacketWriter* writer() {
return down_cast<TestPacketWriter*>(QuicConnection::writer());
}
SimpleDataProducer producer_;
SimpleSessionNotifier* notifier_;
std::unique_ptr<QuicSocketAddress> next_effective_peer_addr_;
};
enum class AckResponse { kDefer, kImmediate };
// Run tests with combinations of {ParsedQuicVersion, AckResponse}.
struct TestParams {
TestParams(ParsedQuicVersion version,
AckResponse ack_response,
bool no_stop_waiting)
: version(version),
ack_response(ack_response),
no_stop_waiting(no_stop_waiting) {}
friend std::ostream& operator<<(std::ostream& os, const TestParams& p) {
os << "{ client_version: " << ParsedQuicVersionToString(p.version)
<< " ack_response: "
<< (p.ack_response == AckResponse::kDefer ? "defer" : "immediate")
<< " no_stop_waiting: " << p.no_stop_waiting << " }";
return os;
}
ParsedQuicVersion version;
AckResponse ack_response;
bool no_stop_waiting;
};
// Constructs various test permutations.
std::vector<TestParams> GetTestParams() {
QuicFlagSaver flags;
SetQuicFlag(&FLAGS_quic_supports_tls_handshake, true);
std::vector<TestParams> params;
ParsedQuicVersionVector all_supported_versions = AllSupportedVersions();
for (size_t i = 0; i < all_supported_versions.size(); ++i) {
for (AckResponse ack_response :
{AckResponse::kDefer, AckResponse::kImmediate}) {
for (bool no_stop_waiting : {true, false}) {
// After version 43, never use STOP_WAITING.
if (all_supported_versions[i].transport_version <= QUIC_VERSION_43 ||
no_stop_waiting) {
params.push_back(TestParams(all_supported_versions[i], ack_response,
no_stop_waiting));
}
}
}
}
return params;
}
class QuicConnectionTest : public QuicTestWithParam<TestParams> {
protected:
QuicConnectionTest()
: connection_id_(TestConnectionId()),
framer_(SupportedVersions(version()),
QuicTime::Zero(),
Perspective::IS_CLIENT),
send_algorithm_(new StrictMock<MockSendAlgorithm>),
loss_algorithm_(new MockLossAlgorithm()),
helper_(new TestConnectionHelper(&clock_, &random_generator_)),
alarm_factory_(new TestAlarmFactory()),
peer_framer_(SupportedVersions(version()),
QuicTime::Zero(),
Perspective::IS_SERVER),
peer_creator_(connection_id_,
&peer_framer_,
/*delegate=*/nullptr),
writer_(new TestPacketWriter(version(), &clock_)),
connection_(connection_id_,
kPeerAddress,
helper_.get(),
alarm_factory_.get(),
writer_.get(),
Perspective::IS_CLIENT,
version()),
creator_(QuicConnectionPeer::GetPacketCreator(&connection_)),
generator_(QuicConnectionPeer::GetPacketGenerator(&connection_)),
manager_(QuicConnectionPeer::GetSentPacketManager(&connection_)),
frame1_(QuicUtils::GetCryptoStreamId(version().transport_version),
false,
0,
QuicStringPiece(data1)),
frame2_(QuicUtils::GetCryptoStreamId(version().transport_version),
false,
3,
QuicStringPiece(data2)),
packet_number_length_(PACKET_4BYTE_PACKET_NUMBER),
connection_id_length_(PACKET_8BYTE_CONNECTION_ID),
notifier_(&connection_) {
SetQuicFlag(&FLAGS_quic_supports_tls_handshake, true);
connection_.set_defer_send_in_response_to_packets(GetParam().ack_response ==
AckResponse::kDefer);
QuicFramerPeer::SetLastSerializedConnectionId(
QuicConnectionPeer::GetFramer(&connection_), connection_id_);
if (version().transport_version > QUIC_VERSION_43) {
EXPECT_TRUE(QuicConnectionPeer::GetNoStopWaitingFrames(&connection_));
} else {
QuicConnectionPeer::SetNoStopWaitingFrames(&connection_,
GetParam().no_stop_waiting);
}
connection_.set_visitor(&visitor_);
if (connection_.session_decides_what_to_write()) {
connection_.SetSessionNotifier(&notifier_);
connection_.set_notifier(&notifier_);
}
connection_.SetSendAlgorithm(send_algorithm_);
connection_.SetLossAlgorithm(loss_algorithm_.get());
EXPECT_CALL(*send_algorithm_, CanSend(_)).WillRepeatedly(Return(true));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.Times(AnyNumber());
EXPECT_CALL(*send_algorithm_, GetCongestionWindow())
.WillRepeatedly(Return(kDefaultTCPMSS));
EXPECT_CALL(*send_algorithm_, PacingRate(_))
.WillRepeatedly(Return(QuicBandwidth::Zero()));
EXPECT_CALL(*send_algorithm_, HasReliableBandwidthEstimate())
.Times(AnyNumber());
EXPECT_CALL(*send_algorithm_, BandwidthEstimate())
.Times(AnyNumber())
.WillRepeatedly(Return(QuicBandwidth::Zero()));
EXPECT_CALL(*send_algorithm_, InSlowStart()).Times(AnyNumber());
EXPECT_CALL(*send_algorithm_, InRecovery()).Times(AnyNumber());
EXPECT_CALL(*send_algorithm_, OnApplicationLimited(_)).Times(AnyNumber());
EXPECT_CALL(visitor_, WillingAndAbleToWrite()).Times(AnyNumber());
EXPECT_CALL(visitor_, HasPendingHandshake()).Times(AnyNumber());
if (connection_.session_decides_what_to_write()) {
EXPECT_CALL(visitor_, OnCanWrite())
.WillRepeatedly(
Invoke(&notifier_, &SimpleSessionNotifier::OnCanWrite));
} else {
EXPECT_CALL(visitor_, OnCanWrite()).Times(AnyNumber());
}
EXPECT_CALL(visitor_, HasOpenDynamicStreams())
.WillRepeatedly(Return(false));
EXPECT_CALL(visitor_, OnCongestionWindowChange(_)).Times(AnyNumber());
EXPECT_CALL(visitor_, OnConnectivityProbeReceived(_, _)).Times(AnyNumber());
EXPECT_CALL(visitor_, OnForwardProgressConfirmed()).Times(AnyNumber());
EXPECT_CALL(*loss_algorithm_, GetLossTimeout())
.WillRepeatedly(Return(QuicTime::Zero()));
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _))
.Times(AnyNumber());
}
QuicConnectionTest(const QuicConnectionTest&) = delete;
QuicConnectionTest& operator=(const QuicConnectionTest&) = delete;
ParsedQuicVersion version() { return GetParam().version; }
QuicAckFrame* outgoing_ack() {
QuicFrame ack_frame = QuicConnectionPeer::GetUpdatedAckFrame(&connection_);
ack_ = *ack_frame.ack_frame;
return &ack_;
}
QuicStopWaitingFrame* stop_waiting() {
QuicConnectionPeer::PopulateStopWaitingFrame(&connection_, &stop_waiting_);
return &stop_waiting_;
}
QuicPacketNumber least_unacked() {
if (writer_->stop_waiting_frames().empty()) {
return QuicPacketNumber();
}
return writer_->stop_waiting_frames()[0].least_unacked;
}
void use_tagging_decrypter() { writer_->use_tagging_decrypter(); }
void ProcessPacket(uint64_t number) {
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacket(number);
if (connection_.GetSendAlarm()->IsSet()) {
connection_.GetSendAlarm()->Fire();
}
}
void ProcessReceivedPacket(const QuicSocketAddress& self_address,
const QuicSocketAddress& peer_address,
const QuicReceivedPacket& packet) {
connection_.ProcessUdpPacket(self_address, peer_address, packet);
if (connection_.GetSendAlarm()->IsSet()) {
connection_.GetSendAlarm()->Fire();
}
}
void ProcessFramePacket(QuicFrame frame) {
ProcessFramePacketWithAddresses(frame, kSelfAddress, kPeerAddress);
}
void ProcessFramePacketWithAddresses(QuicFrame frame,
QuicSocketAddress self_address,
QuicSocketAddress peer_address) {
QuicFrames frames;
frames.push_back(QuicFrame(frame));
QuicPacketCreatorPeer::SetSendVersionInPacket(
&peer_creator_, connection_.perspective() == Perspective::IS_SERVER);
if (QuicPacketCreatorPeer::GetEncryptionLevel(&peer_creator_) >
ENCRYPTION_NONE) {
// Set peer_framer_'s corresponding encrypter.
peer_creator_.SetEncrypter(
QuicPacketCreatorPeer::GetEncryptionLevel(&peer_creator_),
QuicMakeUnique<NullEncrypter>(peer_framer_.perspective()));
}
char buffer[kMaxPacketSize];
SerializedPacket serialized_packet =
QuicPacketCreatorPeer::SerializeAllFrames(&peer_creator_, frames,
buffer, kMaxPacketSize);
connection_.ProcessUdpPacket(
self_address, peer_address,
QuicReceivedPacket(serialized_packet.encrypted_buffer,
serialized_packet.encrypted_length, clock_.Now()));
if (connection_.GetSendAlarm()->IsSet()) {
connection_.GetSendAlarm()->Fire();
}
}
// Bypassing the packet creator is unrealistic, but allows us to process
// packets the QuicPacketCreator won't allow us to create.
void ForceProcessFramePacket(QuicFrame frame) {
QuicFrames frames;
frames.push_back(QuicFrame(frame));
QuicPacketCreatorPeer::SetSendVersionInPacket(
&peer_creator_, connection_.perspective() == Perspective::IS_SERVER);
QuicPacketHeader header;
QuicPacketCreatorPeer::FillPacketHeader(&peer_creator_, &header);
char encrypted_buffer[kMaxPacketSize];
size_t length = peer_framer_.BuildDataPacket(
header, frames, encrypted_buffer, kMaxPacketSize);
DCHECK_GT(length, 0u);
const size_t encrypted_length = peer_framer_.EncryptInPlace(
ENCRYPTION_NONE, header.packet_number,
GetStartOfEncryptedData(peer_framer_.version().transport_version,
header),
length, kMaxPacketSize, encrypted_buffer);
DCHECK_GT(encrypted_length, 0u);
connection_.ProcessUdpPacket(
kSelfAddress, kPeerAddress,
QuicReceivedPacket(encrypted_buffer, encrypted_length, clock_.Now()));
}
size_t ProcessFramePacketAtLevel(uint64_t number,
QuicFrame frame,
EncryptionLevel level) {
QuicPacketHeader header;
header.destination_connection_id = connection_id_;
header.packet_number_length = packet_number_length_;
header.destination_connection_id_length = connection_id_length_;
if (peer_framer_.transport_version() > QUIC_VERSION_43 &&
peer_framer_.perspective() == Perspective::IS_SERVER) {
header.destination_connection_id_length = PACKET_0BYTE_CONNECTION_ID;
}
header.packet_number = QuicPacketNumber(number);
QuicFrames frames;
frames.push_back(frame);
std::unique_ptr<QuicPacket> packet(ConstructPacket(header, frames));
char buffer[kMaxPacketSize];
size_t encrypted_length = framer_.EncryptPayload(
level, QuicPacketNumber(number), *packet, buffer, kMaxPacketSize);
connection_.ProcessUdpPacket(
kSelfAddress, kPeerAddress,
QuicReceivedPacket(buffer, encrypted_length, QuicTime::Zero(), false));
return encrypted_length;
}
size_t ProcessDataPacket(uint64_t number) {
return ProcessDataPacketAtLevel(number, false, ENCRYPTION_NONE);
}
size_t ProcessDataPacket(QuicPacketNumber packet_number) {
return ProcessDataPacketAtLevel(packet_number, false, ENCRYPTION_NONE);
}
size_t ProcessDataPacketAtLevel(QuicPacketNumber packet_number,
bool has_stop_waiting,
EncryptionLevel level) {
return ProcessDataPacketAtLevel(packet_number.ToUint64(), has_stop_waiting,
level);
}
size_t ProcessDataPacketAtLevel(uint64_t number,
bool has_stop_waiting,
EncryptionLevel level) {
std::unique_ptr<QuicPacket> packet(
ConstructDataPacket(number, has_stop_waiting));
char buffer[kMaxPacketSize];
size_t encrypted_length = peer_framer_.EncryptPayload(
level, QuicPacketNumber(number), *packet, buffer, kMaxPacketSize);
connection_.ProcessUdpPacket(
kSelfAddress, kPeerAddress,
QuicReceivedPacket(buffer, encrypted_length, clock_.Now(), false));
if (connection_.GetSendAlarm()->IsSet()) {
connection_.GetSendAlarm()->Fire();
}
return encrypted_length;
}
void ProcessClosePacket(uint64_t number) {
std::unique_ptr<QuicPacket> packet(ConstructClosePacket(number));
char buffer[kMaxPacketSize];
size_t encrypted_length =
peer_framer_.EncryptPayload(ENCRYPTION_NONE, QuicPacketNumber(number),
*packet, buffer, kMaxPacketSize);
connection_.ProcessUdpPacket(
kSelfAddress, kPeerAddress,
QuicReceivedPacket(buffer, encrypted_length, QuicTime::Zero(), false));
}
QuicByteCount SendStreamDataToPeer(QuicStreamId id,
QuicStringPiece data,
QuicStreamOffset offset,
StreamSendingState state,
QuicPacketNumber* last_packet) {
QuicByteCount packet_size;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.WillOnce(SaveArg<3>(&packet_size));
connection_.SendStreamDataWithString(id, data, offset, state);
if (last_packet != nullptr) {
*last_packet = creator_->packet_number();
}
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.Times(AnyNumber());
return packet_size;
}
void SendAckPacketToPeer() {
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
{
QuicConnection::ScopedPacketFlusher flusher(&connection_,
QuicConnection::NO_ACK);
connection_.SendAck();
}
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.Times(AnyNumber());
}
void SendRstStream(QuicStreamId id,
QuicRstStreamErrorCode error,
QuicStreamOffset bytes_written) {
if (connection_.session_decides_what_to_write()) {
notifier_.WriteOrBufferRstStream(id, error, bytes_written);
connection_.OnStreamReset(id, error);
return;
}
std::unique_ptr<QuicRstStreamFrame> rst_stream =
QuicMakeUnique<QuicRstStreamFrame>(1, id, error, bytes_written);
if (connection_.SendControlFrame(QuicFrame(rst_stream.get()))) {
rst_stream.release();
}
connection_.OnStreamReset(id, error);
}
void ProcessAckPacket(uint64_t packet_number, QuicAckFrame* frame) {
if (packet_number > 1) {
QuicPacketCreatorPeer::SetPacketNumber(&peer_creator_, packet_number - 1);
} else {
QuicPacketCreatorPeer::ClearPacketNumber(&peer_creator_);
}
ProcessFramePacket(QuicFrame(frame));
}
void ProcessAckPacket(QuicAckFrame* frame) {
ProcessFramePacket(QuicFrame(frame));
}
void ProcessStopWaitingPacket(QuicStopWaitingFrame* frame) {
ProcessFramePacket(QuicFrame(frame));
}
size_t ProcessStopWaitingPacketAtLevel(uint64_t number,
QuicStopWaitingFrame* frame,
EncryptionLevel level) {
return ProcessFramePacketAtLevel(number, QuicFrame(frame),
ENCRYPTION_INITIAL);
}
void ProcessGoAwayPacket(QuicGoAwayFrame* frame) {
ProcessFramePacket(QuicFrame(frame));
}
bool IsMissing(uint64_t number) {
return IsAwaitingPacket(*outgoing_ack(), QuicPacketNumber(number),
QuicPacketNumber());
}
std::unique_ptr<QuicPacket> ConstructPacket(const QuicPacketHeader& header,
const QuicFrames& frames) {
auto packet = BuildUnsizedDataPacket(&peer_framer_, header, frames);
EXPECT_NE(nullptr, packet.get());
return packet;
}
std::unique_ptr<QuicPacket> ConstructDataPacket(uint64_t number,
bool has_stop_waiting) {
QuicPacketHeader header;
// Set connection_id to peer's in memory representation as this data packet
// is created by peer_framer.
header.destination_connection_id = connection_id_;
header.packet_number_length = packet_number_length_;
header.destination_connection_id_length = connection_id_length_;
if (peer_framer_.transport_version() > QUIC_VERSION_43 &&
peer_framer_.perspective() == Perspective::IS_SERVER) {
header.destination_connection_id_length = PACKET_0BYTE_CONNECTION_ID;
}
header.packet_number = QuicPacketNumber(number);
QuicFrames frames;
frames.push_back(QuicFrame(frame1_));
if (has_stop_waiting) {
frames.push_back(QuicFrame(&stop_waiting_));
}
return ConstructPacket(header, frames);
}
OwningSerializedPacketPointer ConstructProbingPacket() {
if (version().transport_version == QUIC_VERSION_99) {
QuicPathFrameBuffer payload = {
{0xde, 0xad, 0xbe, 0xef, 0xba, 0xdc, 0x0f, 0xfe}};
return QuicPacketCreatorPeer::
SerializePathChallengeConnectivityProbingPacket(&peer_creator_,
&payload);
}
return QuicPacketCreatorPeer::SerializeConnectivityProbingPacket(
&peer_creator_);
}
std::unique_ptr<QuicPacket> ConstructClosePacket(uint64_t number) {
QuicPacketHeader header;
// Set connection_id to peer's in memory representation as this connection
// close packet is created by peer_framer.
header.destination_connection_id = connection_id_;
header.packet_number = QuicPacketNumber(number);
if (peer_framer_.transport_version() > QUIC_VERSION_43 &&
peer_framer_.perspective() == Perspective::IS_SERVER) {
header.destination_connection_id_length = PACKET_0BYTE_CONNECTION_ID;
}
QuicConnectionCloseFrame qccf;
qccf.error_code = QUIC_PEER_GOING_AWAY;
QuicFrames frames;
frames.push_back(QuicFrame(&qccf));
return ConstructPacket(header, frames);
}
QuicTime::Delta DefaultRetransmissionTime() {
return QuicTime::Delta::FromMilliseconds(kDefaultRetransmissionTimeMs);
}
QuicTime::Delta DefaultDelayedAckTime() {
return QuicTime::Delta::FromMilliseconds(kDefaultDelayedAckTimeMs);
}
const QuicStopWaitingFrame InitStopWaitingFrame(uint64_t least_unacked) {
QuicStopWaitingFrame frame;
frame.least_unacked = QuicPacketNumber(least_unacked);
return frame;
}
// Construct a ack_frame that acks all packet numbers between 1 and
// |largest_acked|, except |missing|.
// REQUIRES: 1 <= |missing| < |largest_acked|
QuicAckFrame ConstructAckFrame(uint64_t largest_acked, uint64_t missing) {
return ConstructAckFrame(QuicPacketNumber(largest_acked),
QuicPacketNumber(missing));
}
QuicAckFrame ConstructAckFrame(QuicPacketNumber largest_acked,
QuicPacketNumber missing) {
if (missing == QuicPacketNumber(1)) {
return InitAckFrame({{missing + 1, largest_acked + 1}});
}
return InitAckFrame(
{{QuicPacketNumber(1), missing}, {missing + 1, largest_acked + 1}});
}
// Undo nacking a packet within the frame.
void AckPacket(QuicPacketNumber arrived, QuicAckFrame* frame) {
EXPECT_FALSE(frame->packets.Contains(arrived));
frame->packets.Add(arrived);
}
void TriggerConnectionClose() {
// Send an erroneous packet to close the connection.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_INVALID_PACKET_HEADER, _,
ConnectionCloseSource::FROM_SELF));
// Call ProcessDataPacket rather than ProcessPacket, as we should not get a
// packet call to the visitor.
if (GetQuicRestartFlag(quic_enable_accept_random_ipn)) {
ProcessDataPacket(MaxRandomInitialPacketNumber() + 6000);
} else {
ProcessDataPacket(6000);
}
EXPECT_FALSE(QuicConnectionPeer::GetConnectionClosePacket(&connection_) ==
nullptr);
}
void BlockOnNextWrite() {
writer_->BlockOnNextWrite();
EXPECT_CALL(visitor_, OnWriteBlocked()).Times(AtLeast(1));
}
void SimulateNextPacketTooLarge() { writer_->SimulateNextPacketTooLarge(); }
void AlwaysGetPacketTooLarge() { writer_->AlwaysGetPacketTooLarge(); }
void SetWritePauseTimeDelta(QuicTime::Delta delta) {
writer_->SetWritePauseTimeDelta(delta);
}
void CongestionBlockWrites() {
EXPECT_CALL(*send_algorithm_, CanSend(_))
.WillRepeatedly(testing::Return(false));
}
void CongestionUnblockWrites() {
EXPECT_CALL(*send_algorithm_, CanSend(_))
.WillRepeatedly(testing::Return(true));
}
void set_perspective(Perspective perspective) {
connection_.set_perspective(perspective);
if (perspective == Perspective::IS_SERVER) {
connection_.set_can_truncate_connection_ids(true);
}
QuicFramerPeer::SetPerspective(&peer_framer_,
InvertPerspective(perspective));
}
void set_packets_between_probes_base(
const QuicPacketCount packets_between_probes_base) {
QuicConnectionPeer::SetPacketsBetweenMtuProbes(&connection_,
packets_between_probes_base);
QuicConnectionPeer::SetNextMtuProbeAt(
&connection_, QuicPacketNumber(packets_between_probes_base));
}
bool IsDefaultTestConfiguration() {
TestParams p = GetParam();
return p.ack_response == AckResponse::kImmediate &&
p.version == AllSupportedVersions()[0] && p.no_stop_waiting;
}
QuicConnectionId connection_id_;
QuicFramer framer_;
MockSendAlgorithm* send_algorithm_;
std::unique_ptr<MockLossAlgorithm> loss_algorithm_;
MockClock clock_;
MockRandom random_generator_;
SimpleBufferAllocator buffer_allocator_;
std::unique_ptr<TestConnectionHelper> helper_;
std::unique_ptr<TestAlarmFactory> alarm_factory_;
QuicFramer peer_framer_;
QuicPacketCreator peer_creator_;
std::unique_ptr<TestPacketWriter> writer_;
TestConnection connection_;
QuicPacketCreator* creator_;
QuicPacketGenerator* generator_;
QuicSentPacketManager* manager_;
StrictMock<MockQuicConnectionVisitor> visitor_;
QuicStreamFrame frame1_;
QuicStreamFrame frame2_;
QuicAckFrame ack_;
QuicStopWaitingFrame stop_waiting_;
QuicPacketNumberLength packet_number_length_;
QuicConnectionIdLength connection_id_length_;
SimpleSessionNotifier notifier_;
};
// Run all end to end tests with all supported versions.
INSTANTIATE_TEST_CASE_P(SupportedVersion,
QuicConnectionTest,
::testing::ValuesIn(GetTestParams()));
TEST_P(QuicConnectionTest, SelfAddressChangeAtClient) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_EQ(Perspective::IS_CLIENT, connection_.perspective());
EXPECT_TRUE(connection_.connected());
QuicStreamFrame stream_frame(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), false, 0u,
QuicStringPiece());
EXPECT_CALL(visitor_, OnStreamFrame(_));
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kPeerAddress);
// Cause change in self_address.
QuicIpAddress host;
host.FromString("1.1.1.1");
QuicSocketAddress self_address(host, 123);
EXPECT_CALL(visitor_, OnStreamFrame(_));
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), self_address,
kPeerAddress);
EXPECT_TRUE(connection_.connected());
}
TEST_P(QuicConnectionTest, SelfAddressChangeAtServer) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
set_perspective(Perspective::IS_SERVER);
QuicPacketCreatorPeer::SetSendVersionInPacket(creator_, false);
EXPECT_EQ(Perspective::IS_SERVER, connection_.perspective());
EXPECT_TRUE(connection_.connected());
QuicStreamFrame stream_frame(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), false, 0u,
QuicStringPiece());
EXPECT_CALL(visitor_, OnStreamFrame(_));
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kPeerAddress);
// Cause change in self_address.
QuicIpAddress host;
host.FromString("1.1.1.1");
QuicSocketAddress self_address(host, 123);
EXPECT_CALL(visitor_, AllowSelfAddressChange()).WillOnce(Return(false));
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_ERROR_MIGRATING_ADDRESS, _, _));
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), self_address,
kPeerAddress);
EXPECT_FALSE(connection_.connected());
}
TEST_P(QuicConnectionTest, AllowSelfAddressChangeToMappedIpv4AddressAtServer) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
set_perspective(Perspective::IS_SERVER);
QuicPacketCreatorPeer::SetSendVersionInPacket(creator_, false);
EXPECT_EQ(Perspective::IS_SERVER, connection_.perspective());
EXPECT_TRUE(connection_.connected());
QuicStreamFrame stream_frame(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), false, 0u,
QuicStringPiece());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(3);
QuicIpAddress host;
host.FromString("1.1.1.1");
QuicSocketAddress self_address1(host, 443);
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), self_address1,
kPeerAddress);
// Cause self_address change to mapped Ipv4 address.
QuicIpAddress host2;
host2.FromString(
QuicStrCat("::ffff:", connection_.self_address().host().ToString()));
QuicSocketAddress self_address2(host2, connection_.self_address().port());
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), self_address2,
kPeerAddress);
EXPECT_TRUE(connection_.connected());
// self_address change back to Ipv4 address.
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), self_address1,
kPeerAddress);
EXPECT_TRUE(connection_.connected());
}
TEST_P(QuicConnectionTest, ClientAddressChangeAndPacketReordered) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
set_perspective(Perspective::IS_SERVER);
QuicPacketCreatorPeer::SetSendVersionInPacket(creator_, false);
// Clear direct_peer_address.
QuicConnectionPeer::SetDirectPeerAddress(&connection_, QuicSocketAddress());
// Clear effective_peer_address, it is the same as direct_peer_address for
// this test.
QuicConnectionPeer::SetEffectivePeerAddress(&connection_,
QuicSocketAddress());
QuicPacketCreatorPeer::SetPacketNumber(&peer_creator_, 5);
QuicStreamFrame stream_frame(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), false, 0u,
QuicStringPiece());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(AnyNumber());
const QuicSocketAddress kNewPeerAddress =
QuicSocketAddress(QuicIpAddress::Loopback6(),
/*port=*/23456);
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kNewPeerAddress);
EXPECT_EQ(kNewPeerAddress, connection_.peer_address());
EXPECT_EQ(kNewPeerAddress, connection_.effective_peer_address());
// Decrease packet number to simulate out-of-order packets.
QuicPacketCreatorPeer::SetPacketNumber(&peer_creator_, 4);
// This is an old packet, do not migrate.
EXPECT_CALL(visitor_, OnConnectionMigration(PORT_CHANGE)).Times(0);
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kPeerAddress);
EXPECT_EQ(kNewPeerAddress, connection_.peer_address());
EXPECT_EQ(kNewPeerAddress, connection_.effective_peer_address());
}
TEST_P(QuicConnectionTest, PeerAddressChangeAtServer) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
set_perspective(Perspective::IS_SERVER);
QuicPacketCreatorPeer::SetSendVersionInPacket(creator_, false);
EXPECT_EQ(Perspective::IS_SERVER, connection_.perspective());
// Clear direct_peer_address.
QuicConnectionPeer::SetDirectPeerAddress(&connection_, QuicSocketAddress());
// Clear effective_peer_address, it is the same as direct_peer_address for
// this test.
QuicConnectionPeer::SetEffectivePeerAddress(&connection_,
QuicSocketAddress());
EXPECT_FALSE(connection_.effective_peer_address().IsInitialized());
QuicStreamFrame stream_frame(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), false, 0u,
QuicStringPiece());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(AnyNumber());
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kPeerAddress);
EXPECT_EQ(kPeerAddress, connection_.peer_address());
EXPECT_EQ(kPeerAddress, connection_.effective_peer_address());
// Process another packet with a different peer address on server side will
// start connection migration.
const QuicSocketAddress kNewPeerAddress =
QuicSocketAddress(QuicIpAddress::Loopback6(), /*port=*/23456);
EXPECT_CALL(visitor_, OnConnectionMigration(PORT_CHANGE)).Times(1);
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kNewPeerAddress);
EXPECT_EQ(kNewPeerAddress, connection_.peer_address());
EXPECT_EQ(kNewPeerAddress, connection_.effective_peer_address());
}
TEST_P(QuicConnectionTest, EffectivePeerAddressChangeAtServer) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
set_perspective(Perspective::IS_SERVER);
QuicPacketCreatorPeer::SetSendVersionInPacket(creator_, false);
EXPECT_EQ(Perspective::IS_SERVER, connection_.perspective());
// Clear direct_peer_address.
QuicConnectionPeer::SetDirectPeerAddress(&connection_, QuicSocketAddress());
// Clear effective_peer_address, it is different from direct_peer_address for
// this test.
QuicConnectionPeer::SetEffectivePeerAddress(&connection_,
QuicSocketAddress());
const QuicSocketAddress kEffectivePeerAddress =
QuicSocketAddress(QuicIpAddress::Loopback6(), /*port=*/43210);
connection_.ReturnEffectivePeerAddressForNextPacket(kEffectivePeerAddress);
QuicStreamFrame stream_frame(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), false, 0u,
QuicStringPiece());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(AnyNumber());
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kPeerAddress);
EXPECT_EQ(kPeerAddress, connection_.peer_address());
EXPECT_EQ(kEffectivePeerAddress, connection_.effective_peer_address());
// Process another packet with the same direct peer address and different
// effective peer address on server side will start connection migration.
const QuicSocketAddress kNewEffectivePeerAddress =
QuicSocketAddress(QuicIpAddress::Loopback6(), /*port=*/54321);
connection_.ReturnEffectivePeerAddressForNextPacket(kNewEffectivePeerAddress);
EXPECT_CALL(visitor_, OnConnectionMigration(PORT_CHANGE)).Times(1);
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kPeerAddress);
EXPECT_EQ(kPeerAddress, connection_.peer_address());
EXPECT_EQ(kNewEffectivePeerAddress, connection_.effective_peer_address());
// Process another packet with a different direct peer address and the same
// effective peer address on server side will not start connection migration.
const QuicSocketAddress kNewPeerAddress =
QuicSocketAddress(QuicIpAddress::Loopback6(), /*port=*/23456);
connection_.ReturnEffectivePeerAddressForNextPacket(kNewEffectivePeerAddress);
EXPECT_CALL(visitor_, OnConnectionMigration(PORT_CHANGE)).Times(0);
// ack_frame is used to complete the migration started by the last packet, we
// need to make sure a new migration does not start after the previous one is
// completed.
QuicAckFrame ack_frame = InitAckFrame(1);
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(_, _, _, _, _));
ProcessFramePacketWithAddresses(QuicFrame(&ack_frame), kSelfAddress,
kNewPeerAddress);
EXPECT_EQ(kNewPeerAddress, connection_.peer_address());
EXPECT_EQ(kNewEffectivePeerAddress, connection_.effective_peer_address());
// Process another packet with different direct peer address and different
// effective peer address on server side will start connection migration.
const QuicSocketAddress kNewerEffectivePeerAddress =
QuicSocketAddress(QuicIpAddress::Loopback6(), /*port=*/65432);
const QuicSocketAddress kFinalPeerAddress =
QuicSocketAddress(QuicIpAddress::Loopback6(), /*port=*/34567);
connection_.ReturnEffectivePeerAddressForNextPacket(
kNewerEffectivePeerAddress);
EXPECT_CALL(visitor_, OnConnectionMigration(PORT_CHANGE)).Times(1);
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kFinalPeerAddress);
EXPECT_EQ(kFinalPeerAddress, connection_.peer_address());
EXPECT_EQ(kNewerEffectivePeerAddress, connection_.effective_peer_address());
EXPECT_EQ(PORT_CHANGE, connection_.active_effective_peer_migration_type());
// While the previous migration is ongoing, process another packet with the
// same direct peer address and different effective peer address on server
// side will start a new connection migration.
const QuicSocketAddress kNewestEffectivePeerAddress =
QuicSocketAddress(QuicIpAddress::Loopback4(), /*port=*/65430);
connection_.ReturnEffectivePeerAddressForNextPacket(
kNewestEffectivePeerAddress);
EXPECT_CALL(visitor_, OnConnectionMigration(IPV6_TO_IPV4_CHANGE)).Times(1);
EXPECT_CALL(*send_algorithm_, OnConnectionMigration()).Times(1);
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kFinalPeerAddress);
EXPECT_EQ(kFinalPeerAddress, connection_.peer_address());
EXPECT_EQ(kNewestEffectivePeerAddress, connection_.effective_peer_address());
EXPECT_EQ(IPV6_TO_IPV4_CHANGE,
connection_.active_effective_peer_migration_type());
}
TEST_P(QuicConnectionTest, ReceivePaddedPingAtServer) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
set_perspective(Perspective::IS_SERVER);
QuicPacketCreatorPeer::SetSendVersionInPacket(creator_, false);
EXPECT_EQ(Perspective::IS_SERVER, connection_.perspective());
// Clear direct_peer_address.
QuicConnectionPeer::SetDirectPeerAddress(&connection_, QuicSocketAddress());
// Clear effective_peer_address, it is the same as direct_peer_address for
// this test.
QuicConnectionPeer::SetEffectivePeerAddress(&connection_,
QuicSocketAddress());
EXPECT_FALSE(connection_.effective_peer_address().IsInitialized());
QuicStreamFrame stream_frame(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), false, 0u,
QuicStringPiece());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(AnyNumber());
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kPeerAddress);
EXPECT_EQ(kPeerAddress, connection_.peer_address());
EXPECT_EQ(kPeerAddress, connection_.effective_peer_address());
EXPECT_CALL(visitor_, OnConnectionMigration(PORT_CHANGE)).Times(0);
EXPECT_CALL(visitor_, OnConnectivityProbeReceived(_, _)).Times(0);
// Process a padded PING or PATH CHALLENGE packet with no peer address change
// on server side will be ignored.
OwningSerializedPacketPointer probing_packet;
if (version().transport_version == QUIC_VERSION_99) {
QuicPathFrameBuffer payload = {
{0xde, 0xad, 0xbe, 0xef, 0xba, 0xdc, 0x0f, 0xfe}};
probing_packet =
QuicPacketCreatorPeer::SerializePathChallengeConnectivityProbingPacket(
&peer_creator_, &payload);
} else {
probing_packet = QuicPacketCreatorPeer::SerializeConnectivityProbingPacket(
&peer_creator_);
}
std::unique_ptr<QuicReceivedPacket> received(ConstructReceivedPacket(
QuicEncryptedPacket(probing_packet->encrypted_buffer,
probing_packet->encrypted_length),
clock_.Now()));
uint64_t num_probing_received =
connection_.GetStats().num_connectivity_probing_received;
ProcessReceivedPacket(kSelfAddress, kPeerAddress, *received);
if (!GetQuicReloadableFlag(quic_clear_probing_mark_after_packet_processing)) {
EXPECT_FALSE(connection_.IsCurrentPacketConnectivityProbing());
}
EXPECT_EQ(num_probing_received,
connection_.GetStats().num_connectivity_probing_received);
EXPECT_EQ(kPeerAddress, connection_.peer_address());
EXPECT_EQ(kPeerAddress, connection_.effective_peer_address());
}
TEST_P(QuicConnectionTest, WriteOutOfOrderQueuedPackets) {
// EXPECT_QUIC_BUG tests are expensive so only run one instance of them.
if (!IsDefaultTestConfiguration()) {
return;
}
set_perspective(Perspective::IS_CLIENT);
BlockOnNextWrite();
QuicStreamId stream_id = 2;
connection_.SendStreamDataWithString(stream_id, "foo", 0, NO_FIN);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
writer_->SetWritable();
connection_.SendConnectivityProbingPacket(writer_.get(),
connection_.peer_address());
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_INTERNAL_ERROR,
"Packet written out of order.",
ConnectionCloseSource::FROM_SELF));
EXPECT_QUIC_BUG(connection_.OnCanWrite(),
"Attempt to write packet:1 after:2");
EXPECT_FALSE(connection_.connected());
}
TEST_P(QuicConnectionTest, DiscardQueuedPacketsAfterConnectionClose) {
// Regression test for b/74073386.
{
InSequence seq;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
EXPECT_CALL(visitor_, OnConnectionClosed(_, _, _)).Times(1);
}
set_perspective(Perspective::IS_CLIENT);
writer_->SimulateNextPacketTooLarge();
// This packet write should fail, which should cause the connection to close
// after sending a connection close packet, then the failed packet should be
// queued.
connection_.SendStreamDataWithString(/*id=*/2, "foo", 0, NO_FIN);
EXPECT_FALSE(connection_.connected());
EXPECT_EQ(1u, connection_.NumQueuedPackets());
EXPECT_EQ(0u, connection_.GetStats().packets_discarded);
connection_.OnCanWrite();
EXPECT_EQ(1u, connection_.GetStats().packets_discarded);
}
TEST_P(QuicConnectionTest, ReceiveConnectivityProbingAtServer) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
set_perspective(Perspective::IS_SERVER);
QuicPacketCreatorPeer::SetSendVersionInPacket(creator_, false);
EXPECT_EQ(Perspective::IS_SERVER, connection_.perspective());
// Clear direct_peer_address.
QuicConnectionPeer::SetDirectPeerAddress(&connection_, QuicSocketAddress());
// Clear effective_peer_address, it is the same as direct_peer_address for
// this test.
QuicConnectionPeer::SetEffectivePeerAddress(&connection_,
QuicSocketAddress());
EXPECT_FALSE(connection_.effective_peer_address().IsInitialized());
QuicStreamFrame stream_frame(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), false, 0u,
QuicStringPiece());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(AnyNumber());
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kPeerAddress);
EXPECT_EQ(kPeerAddress, connection_.peer_address());
EXPECT_EQ(kPeerAddress, connection_.effective_peer_address());
EXPECT_CALL(visitor_, OnConnectionMigration(PORT_CHANGE)).Times(0);
EXPECT_CALL(visitor_, OnConnectivityProbeReceived(_, _)).Times(1);
// Process a padded PING packet from a new peer address on server side
// is effectively receiving a connectivity probing.
const QuicSocketAddress kNewPeerAddress =
QuicSocketAddress(QuicIpAddress::Loopback6(), /*port=*/23456);
OwningSerializedPacketPointer probing_packet = ConstructProbingPacket();
std::unique_ptr<QuicReceivedPacket> received(ConstructReceivedPacket(
QuicEncryptedPacket(probing_packet->encrypted_buffer,
probing_packet->encrypted_length),
clock_.Now()));
uint64_t num_probing_received =
connection_.GetStats().num_connectivity_probing_received;
ProcessReceivedPacket(kSelfAddress, kNewPeerAddress, *received);
if (!GetQuicReloadableFlag(quic_clear_probing_mark_after_packet_processing)) {
EXPECT_TRUE(connection_.IsCurrentPacketConnectivityProbing());
}
EXPECT_EQ(num_probing_received + 1,
connection_.GetStats().num_connectivity_probing_received);
EXPECT_EQ(kPeerAddress, connection_.peer_address());
EXPECT_EQ(kPeerAddress, connection_.effective_peer_address());
// Process another packet with the old peer address on server side will not
// start peer migration.
EXPECT_CALL(visitor_, OnConnectionMigration(PORT_CHANGE)).Times(0);
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kPeerAddress);
EXPECT_EQ(kPeerAddress, connection_.peer_address());
EXPECT_EQ(kPeerAddress, connection_.effective_peer_address());
}
TEST_P(QuicConnectionTest, ReceiveReorderedConnectivityProbingAtServer) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
set_perspective(Perspective::IS_SERVER);
QuicPacketCreatorPeer::SetSendVersionInPacket(creator_, false);
EXPECT_EQ(Perspective::IS_SERVER, connection_.perspective());
// Clear direct_peer_address.
QuicConnectionPeer::SetDirectPeerAddress(&connection_, QuicSocketAddress());
// Clear effective_peer_address, it is the same as direct_peer_address for
// this test.
QuicConnectionPeer::SetEffectivePeerAddress(&connection_,
QuicSocketAddress());
EXPECT_FALSE(connection_.effective_peer_address().IsInitialized());
QuicPacketCreatorPeer::SetPacketNumber(&peer_creator_, 5);
QuicStreamFrame stream_frame(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), false, 0u,
QuicStringPiece());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(AnyNumber());
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kPeerAddress);
EXPECT_EQ(kPeerAddress, connection_.peer_address());
EXPECT_EQ(kPeerAddress, connection_.effective_peer_address());
// Decrease packet number to simulate out-of-order packets.
QuicPacketCreatorPeer::SetPacketNumber(&peer_creator_, 4);
EXPECT_CALL(visitor_, OnConnectionMigration(PORT_CHANGE)).Times(0);
EXPECT_CALL(visitor_, OnConnectivityProbeReceived(_, _)).Times(1);
// Process a padded PING packet from a new peer address on server side
// is effectively receiving a connectivity probing, even if a newer packet has
// been received before this one.
const QuicSocketAddress kNewPeerAddress =
QuicSocketAddress(QuicIpAddress::Loopback6(), /*port=*/23456);
OwningSerializedPacketPointer probing_packet = ConstructProbingPacket();
std::unique_ptr<QuicReceivedPacket> received(ConstructReceivedPacket(
QuicEncryptedPacket(probing_packet->encrypted_buffer,
probing_packet->encrypted_length),
clock_.Now()));
uint64_t num_probing_received =
connection_.GetStats().num_connectivity_probing_received;
ProcessReceivedPacket(kSelfAddress, kNewPeerAddress, *received);
if (!GetQuicReloadableFlag(quic_clear_probing_mark_after_packet_processing)) {
EXPECT_TRUE(connection_.IsCurrentPacketConnectivityProbing());
}
EXPECT_EQ(num_probing_received + 1,
connection_.GetStats().num_connectivity_probing_received);
EXPECT_EQ(kPeerAddress, connection_.peer_address());
EXPECT_EQ(kPeerAddress, connection_.effective_peer_address());
}
TEST_P(QuicConnectionTest, MigrateAfterProbingAtServer) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
set_perspective(Perspective::IS_SERVER);
QuicPacketCreatorPeer::SetSendVersionInPacket(creator_, false);
EXPECT_EQ(Perspective::IS_SERVER, connection_.perspective());
// Clear direct_peer_address.
QuicConnectionPeer::SetDirectPeerAddress(&connection_, QuicSocketAddress());
// Clear effective_peer_address, it is the same as direct_peer_address for
// this test.
QuicConnectionPeer::SetEffectivePeerAddress(&connection_,
QuicSocketAddress());
EXPECT_FALSE(connection_.effective_peer_address().IsInitialized());
QuicStreamFrame stream_frame(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), false, 0u,
QuicStringPiece());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(AnyNumber());
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kPeerAddress);
EXPECT_EQ(kPeerAddress, connection_.peer_address());
EXPECT_EQ(kPeerAddress, connection_.effective_peer_address());
EXPECT_CALL(visitor_, OnConnectionMigration(PORT_CHANGE)).Times(0);
EXPECT_CALL(visitor_, OnConnectivityProbeReceived(_, _)).Times(1);
// Process a padded PING packet from a new peer address on server side
// is effectively receiving a connectivity probing.
const QuicSocketAddress kNewPeerAddress =
QuicSocketAddress(QuicIpAddress::Loopback6(), /*port=*/23456);
OwningSerializedPacketPointer probing_packet = ConstructProbingPacket();
std::unique_ptr<QuicReceivedPacket> received(ConstructReceivedPacket(
QuicEncryptedPacket(probing_packet->encrypted_buffer,
probing_packet->encrypted_length),
clock_.Now()));
ProcessReceivedPacket(kSelfAddress, kNewPeerAddress, *received);
EXPECT_EQ(kPeerAddress, connection_.peer_address());
EXPECT_EQ(kPeerAddress, connection_.effective_peer_address());
// Process another non-probing packet with the new peer address on server
// side will start peer migration.
EXPECT_CALL(visitor_, OnConnectionMigration(PORT_CHANGE)).Times(1);
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kNewPeerAddress);
EXPECT_EQ(kNewPeerAddress, connection_.peer_address());
EXPECT_EQ(kNewPeerAddress, connection_.effective_peer_address());
}
TEST_P(QuicConnectionTest, ReceivePaddedPingAtClient) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
set_perspective(Perspective::IS_CLIENT);
EXPECT_EQ(Perspective::IS_CLIENT, connection_.perspective());
// Clear direct_peer_address.
QuicConnectionPeer::SetDirectPeerAddress(&connection_, QuicSocketAddress());
// Clear effective_peer_address, it is the same as direct_peer_address for
// this test.
QuicConnectionPeer::SetEffectivePeerAddress(&connection_,
QuicSocketAddress());
EXPECT_FALSE(connection_.effective_peer_address().IsInitialized());
QuicStreamFrame stream_frame(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), false, 0u,
QuicStringPiece());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(AnyNumber());
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kPeerAddress);
EXPECT_EQ(kPeerAddress, connection_.peer_address());
EXPECT_EQ(kPeerAddress, connection_.effective_peer_address());
// Client takes all padded PING packet as speculative connectivity
// probing packet, and reports to visitor.
EXPECT_CALL(visitor_, OnConnectionMigration(PORT_CHANGE)).Times(0);
EXPECT_CALL(visitor_, OnConnectivityProbeReceived(_, _)).Times(1);
OwningSerializedPacketPointer probing_packet = ConstructProbingPacket();
std::unique_ptr<QuicReceivedPacket> received(ConstructReceivedPacket(
QuicEncryptedPacket(probing_packet->encrypted_buffer,
probing_packet->encrypted_length),
clock_.Now()));
uint64_t num_probing_received =
connection_.GetStats().num_connectivity_probing_received;
ProcessReceivedPacket(kSelfAddress, kPeerAddress, *received);
if (!GetQuicReloadableFlag(quic_clear_probing_mark_after_packet_processing)) {
EXPECT_FALSE(connection_.IsCurrentPacketConnectivityProbing());
}
EXPECT_EQ(num_probing_received,
connection_.GetStats().num_connectivity_probing_received);
EXPECT_EQ(kPeerAddress, connection_.peer_address());
EXPECT_EQ(kPeerAddress, connection_.effective_peer_address());
}
TEST_P(QuicConnectionTest, ReceiveConnectivityProbingAtClient) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
set_perspective(Perspective::IS_CLIENT);
EXPECT_EQ(Perspective::IS_CLIENT, connection_.perspective());
// Clear direct_peer_address.
QuicConnectionPeer::SetDirectPeerAddress(&connection_, QuicSocketAddress());
// Clear effective_peer_address, it is the same as direct_peer_address for
// this test.
QuicConnectionPeer::SetEffectivePeerAddress(&connection_,
QuicSocketAddress());
EXPECT_FALSE(connection_.effective_peer_address().IsInitialized());
QuicStreamFrame stream_frame(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), false, 0u,
QuicStringPiece());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(AnyNumber());
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kPeerAddress);
EXPECT_EQ(kPeerAddress, connection_.peer_address());
EXPECT_EQ(kPeerAddress, connection_.effective_peer_address());
// Process a padded PING packet with a different self address on client side
// is effectively receiving a connectivity probing.
EXPECT_CALL(visitor_, OnConnectionMigration(PORT_CHANGE)).Times(0);
EXPECT_CALL(visitor_, OnConnectivityProbeReceived(_, _)).Times(1);
const QuicSocketAddress kNewSelfAddress =
QuicSocketAddress(QuicIpAddress::Loopback6(), /*port=*/23456);
OwningSerializedPacketPointer probing_packet = ConstructProbingPacket();
std::unique_ptr<QuicReceivedPacket> received(ConstructReceivedPacket(
QuicEncryptedPacket(probing_packet->encrypted_buffer,
probing_packet->encrypted_length),
clock_.Now()));
uint64_t num_probing_received =
connection_.GetStats().num_connectivity_probing_received;
ProcessReceivedPacket(kNewSelfAddress, kPeerAddress, *received);
if (!GetQuicReloadableFlag(quic_clear_probing_mark_after_packet_processing)) {
EXPECT_TRUE(connection_.IsCurrentPacketConnectivityProbing());
}
EXPECT_EQ(num_probing_received + 1,
connection_.GetStats().num_connectivity_probing_received);
EXPECT_EQ(kPeerAddress, connection_.peer_address());
EXPECT_EQ(kPeerAddress, connection_.effective_peer_address());
}
TEST_P(QuicConnectionTest, PeerAddressChangeAtClient) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
set_perspective(Perspective::IS_CLIENT);
EXPECT_EQ(Perspective::IS_CLIENT, connection_.perspective());
// Clear direct_peer_address.
QuicConnectionPeer::SetDirectPeerAddress(&connection_, QuicSocketAddress());
// Clear effective_peer_address, it is the same as direct_peer_address for
// this test.
QuicConnectionPeer::SetEffectivePeerAddress(&connection_,
QuicSocketAddress());
EXPECT_FALSE(connection_.effective_peer_address().IsInitialized());
QuicStreamFrame stream_frame(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), false, 0u,
QuicStringPiece());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(AnyNumber());
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kPeerAddress);
EXPECT_EQ(kPeerAddress, connection_.peer_address());
EXPECT_EQ(kPeerAddress, connection_.effective_peer_address());
// Process another packet with a different peer address on client side will
// only update peer address.
const QuicSocketAddress kNewPeerAddress =
QuicSocketAddress(QuicIpAddress::Loopback6(), /*port=*/23456);
EXPECT_CALL(visitor_, OnConnectionMigration(PORT_CHANGE)).Times(0);
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kNewPeerAddress);
EXPECT_EQ(kNewPeerAddress, connection_.peer_address());
EXPECT_EQ(kNewPeerAddress, connection_.effective_peer_address());
}
TEST_P(QuicConnectionTest, MaxPacketSize) {
EXPECT_EQ(Perspective::IS_CLIENT, connection_.perspective());
EXPECT_EQ(1350u, connection_.max_packet_length());
}
TEST_P(QuicConnectionTest, SmallerServerMaxPacketSize) {
TestConnection connection(TestConnectionId(), kPeerAddress, helper_.get(),
alarm_factory_.get(), writer_.get(),
Perspective::IS_SERVER, version());
EXPECT_EQ(Perspective::IS_SERVER, connection.perspective());
EXPECT_EQ(1000u, connection.max_packet_length());
}
TEST_P(QuicConnectionTest, IncreaseServerMaxPacketSize) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
set_perspective(Perspective::IS_SERVER);
connection_.SetMaxPacketLength(1000);
QuicPacketHeader header;
header.destination_connection_id = connection_id_;
header.version_flag = true;
header.packet_number = QuicPacketNumber(1);
QuicFrames frames;
QuicPaddingFrame padding;
frames.push_back(QuicFrame(frame1_));
frames.push_back(QuicFrame(padding));
std::unique_ptr<QuicPacket> packet(ConstructPacket(header, frames));
char buffer[kMaxPacketSize];
size_t encrypted_length = peer_framer_.EncryptPayload(
ENCRYPTION_NONE, QuicPacketNumber(12), *packet, buffer, kMaxPacketSize);
EXPECT_EQ(kMaxPacketSize, encrypted_length);
framer_.set_version(version());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
connection_.ProcessUdpPacket(
kSelfAddress, kPeerAddress,
QuicReceivedPacket(buffer, encrypted_length, QuicTime::Zero(), false));
EXPECT_EQ(kMaxPacketSize, connection_.max_packet_length());
}
TEST_P(QuicConnectionTest, IncreaseServerMaxPacketSizeWhileWriterLimited) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
const QuicByteCount lower_max_packet_size = 1240;
writer_->set_max_packet_size(lower_max_packet_size);
set_perspective(Perspective::IS_SERVER);
connection_.SetMaxPacketLength(1000);
EXPECT_EQ(1000u, connection_.max_packet_length());
QuicPacketHeader header;
header.destination_connection_id = connection_id_;
header.version_flag = true;
header.packet_number = QuicPacketNumber(1);
QuicFrames frames;
QuicPaddingFrame padding;
frames.push_back(QuicFrame(frame1_));
frames.push_back(QuicFrame(padding));
std::unique_ptr<QuicPacket> packet(ConstructPacket(header, frames));
char buffer[kMaxPacketSize];
size_t encrypted_length = peer_framer_.EncryptPayload(
ENCRYPTION_NONE, QuicPacketNumber(12), *packet, buffer, kMaxPacketSize);
EXPECT_EQ(kMaxPacketSize, encrypted_length);
framer_.set_version(version());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
connection_.ProcessUdpPacket(
kSelfAddress, kPeerAddress,
QuicReceivedPacket(buffer, encrypted_length, QuicTime::Zero(), false));
// Here, the limit imposed by the writer is lower than the size of the packet
// received, so the writer max packet size is used.
EXPECT_EQ(lower_max_packet_size, connection_.max_packet_length());
}
TEST_P(QuicConnectionTest, LimitMaxPacketSizeByWriter) {
const QuicByteCount lower_max_packet_size = 1240;
writer_->set_max_packet_size(lower_max_packet_size);
static_assert(lower_max_packet_size < kDefaultMaxPacketSize,
"Default maximum packet size is too low");
connection_.SetMaxPacketLength(kDefaultMaxPacketSize);
EXPECT_EQ(lower_max_packet_size, connection_.max_packet_length());
}
TEST_P(QuicConnectionTest, LimitMaxPacketSizeByWriterForNewConnection) {
const QuicConnectionId connection_id = TestConnectionId(17);
const QuicByteCount lower_max_packet_size = 1240;
writer_->set_max_packet_size(lower_max_packet_size);
TestConnection connection(connection_id, kPeerAddress, helper_.get(),
alarm_factory_.get(), writer_.get(),
Perspective::IS_CLIENT, version());
EXPECT_EQ(Perspective::IS_CLIENT, connection.perspective());
EXPECT_EQ(lower_max_packet_size, connection.max_packet_length());
}
TEST_P(QuicConnectionTest, PacketsInOrder) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(1);
EXPECT_EQ(QuicPacketNumber(1u), LargestAcked(*outgoing_ack()));
EXPECT_EQ(1u, outgoing_ack()->packets.NumIntervals());
ProcessPacket(2);
EXPECT_EQ(QuicPacketNumber(2u), LargestAcked(*outgoing_ack()));
EXPECT_EQ(1u, outgoing_ack()->packets.NumIntervals());
ProcessPacket(3);
EXPECT_EQ(QuicPacketNumber(3u), LargestAcked(*outgoing_ack()));
EXPECT_EQ(1u, outgoing_ack()->packets.NumIntervals());
}
TEST_P(QuicConnectionTest, PacketsOutOfOrder) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(3);
EXPECT_EQ(QuicPacketNumber(3u), LargestAcked(*outgoing_ack()));
EXPECT_TRUE(IsMissing(2));
EXPECT_TRUE(IsMissing(1));
ProcessPacket(2);
EXPECT_EQ(QuicPacketNumber(3u), LargestAcked(*outgoing_ack()));
EXPECT_FALSE(IsMissing(2));
EXPECT_TRUE(IsMissing(1));
ProcessPacket(1);
EXPECT_EQ(QuicPacketNumber(3u), LargestAcked(*outgoing_ack()));
EXPECT_FALSE(IsMissing(2));
EXPECT_FALSE(IsMissing(1));
}
TEST_P(QuicConnectionTest, DuplicatePacket) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(3);
EXPECT_EQ(QuicPacketNumber(3u), LargestAcked(*outgoing_ack()));
EXPECT_TRUE(IsMissing(2));
EXPECT_TRUE(IsMissing(1));
// Send packet 3 again, but do not set the expectation that
// the visitor OnStreamFrame() will be called.
ProcessDataPacket(3);
EXPECT_EQ(QuicPacketNumber(3u), LargestAcked(*outgoing_ack()));
EXPECT_TRUE(IsMissing(2));
EXPECT_TRUE(IsMissing(1));
}
TEST_P(QuicConnectionTest, PacketsOutOfOrderWithAdditionsAndLeastAwaiting) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(3);
EXPECT_EQ(QuicPacketNumber(3u), LargestAcked(*outgoing_ack()));
EXPECT_TRUE(IsMissing(2));
EXPECT_TRUE(IsMissing(1));
ProcessPacket(2);
EXPECT_EQ(QuicPacketNumber(3u), LargestAcked(*outgoing_ack()));
EXPECT_TRUE(IsMissing(1));
ProcessPacket(5);
EXPECT_EQ(QuicPacketNumber(5u), LargestAcked(*outgoing_ack()));
EXPECT_TRUE(IsMissing(1));
EXPECT_TRUE(IsMissing(4));
// Pretend at this point the client has gotten acks for 2 and 3 and 1 is a
// packet the peer will not retransmit. It indicates this by sending 'least
// awaiting' is 4. The connection should then realize 1 will not be
// retransmitted, and will remove it from the missing list.
QuicAckFrame frame = InitAckFrame(1);
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(_, _, _, _, _));
ProcessAckPacket(6, &frame);
// Force an ack to be sent.
SendAckPacketToPeer();
EXPECT_TRUE(IsMissing(4));
}
TEST_P(QuicConnectionTest, RejectPacketTooFarOut) {
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_INVALID_PACKET_HEADER, _,
ConnectionCloseSource::FROM_SELF));
// Call ProcessDataPacket rather than ProcessPacket, as we should not get a
// packet call to the visitor.
if (GetQuicRestartFlag(quic_enable_accept_random_ipn)) {
ProcessDataPacket(MaxRandomInitialPacketNumber() + 6000);
} else {
ProcessDataPacket(6000);
}
EXPECT_FALSE(QuicConnectionPeer::GetConnectionClosePacket(&connection_) ==
nullptr);
}
TEST_P(QuicConnectionTest, RejectUnencryptedStreamData) {
// EXPECT_QUIC_BUG tests are expensive so only run one instance of them.
if (!IsDefaultTestConfiguration()) {
return;
}
// Process an unencrypted packet from the non-crypto stream.
frame1_.stream_id = 3;
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_UNENCRYPTED_STREAM_DATA, _,
ConnectionCloseSource::FROM_SELF));
EXPECT_QUIC_BUG(ProcessDataPacket(1), "");
EXPECT_FALSE(QuicConnectionPeer::GetConnectionClosePacket(&connection_) ==
nullptr);
const std::vector<QuicConnectionCloseFrame>& connection_close_frames =
writer_->connection_close_frames();
EXPECT_EQ(1u, connection_close_frames.size());
EXPECT_EQ(QUIC_UNENCRYPTED_STREAM_DATA,
connection_close_frames[0].error_code);
}
TEST_P(QuicConnectionTest, OutOfOrderReceiptCausesAckSend) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(3);
// Should ack immediately since we have missing packets.
EXPECT_EQ(1u, writer_->packets_write_attempts());
ProcessPacket(2);
// Should ack immediately since we have missing packets.
EXPECT_EQ(2u, writer_->packets_write_attempts());
ProcessPacket(1);
// Should ack immediately, since this fills the last hole.
EXPECT_EQ(3u, writer_->packets_write_attempts());
ProcessPacket(4);
// Should not cause an ack.
EXPECT_EQ(3u, writer_->packets_write_attempts());
}
TEST_P(QuicConnectionTest, OutOfOrderAckReceiptCausesNoAck) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
SendStreamDataToPeer(1, "foo", 0, NO_FIN, nullptr);
SendStreamDataToPeer(1, "bar", 3, NO_FIN, nullptr);
EXPECT_EQ(2u, writer_->packets_write_attempts());
QuicAckFrame ack1 = InitAckFrame(1);
QuicAckFrame ack2 = InitAckFrame(2);
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
ProcessAckPacket(2, &ack2);
// Should ack immediately since we have missing packets.
EXPECT_EQ(2u, writer_->packets_write_attempts());
ProcessAckPacket(1, &ack1);
// Should not ack an ack filling a missing packet.
EXPECT_EQ(2u, writer_->packets_write_attempts());
}
TEST_P(QuicConnectionTest, AckReceiptCausesAckSend) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
QuicPacketNumber original, second;
QuicByteCount packet_size =
SendStreamDataToPeer(3, "foo", 0, NO_FIN, &original); // 1st packet.
SendStreamDataToPeer(3, "bar", 3, NO_FIN, &second); // 2nd packet.
QuicAckFrame frame = InitAckFrame({{second, second + 1}});
// First nack triggers early retransmit.
LostPacketVector lost_packets;
lost_packets.push_back(LostPacket(original, kMaxPacketSize));
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _))
.WillOnce(SetArgPointee<5>(lost_packets));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
QuicPacketNumber retransmission;
// Packet 1 is short header for IETF QUIC because the encryption level
// switched to ENCRYPTION_FORWARD_SECURE in SendStreamDataToPeer.
EXPECT_CALL(
*send_algorithm_,
OnPacketSent(_, _, _,
GetParam().version.transport_version > QUIC_VERSION_43
? packet_size
: packet_size - kQuicVersionSize,
_))
.WillOnce(SaveArg<2>(&retransmission));
ProcessAckPacket(&frame);
QuicAckFrame frame2 = ConstructAckFrame(retransmission, original);
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _));
ProcessAckPacket(&frame2);
// Now if the peer sends an ack which still reports the retransmitted packet
// as missing, that will bundle an ack with data after two acks in a row
// indicate the high water mark needs to be raised.
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, _, _, HAS_RETRANSMITTABLE_DATA));
connection_.SendStreamDataWithString(3, "foo", 6, NO_FIN);
// No ack sent.
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_EQ(1u, writer_->stream_frames().size());
// No more packet loss for the rest of the test.
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _))
.Times(AnyNumber());
ProcessAckPacket(&frame2);
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, _, _, HAS_RETRANSMITTABLE_DATA));
connection_.SendStreamDataWithString(3, "foo", 9, NO_FIN);
// Ack bundled.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(2u, writer_->frame_count());
} else {
EXPECT_EQ(3u, writer_->frame_count());
}
EXPECT_EQ(1u, writer_->stream_frames().size());
EXPECT_FALSE(writer_->ack_frames().empty());
// But an ack with no missing packets will not send an ack.
AckPacket(original, &frame2);
ProcessAckPacket(&frame2);
ProcessAckPacket(&frame2);
}
TEST_P(QuicConnectionTest, 20AcksCausesAckSend) {
if (connection_.version().transport_version != QUIC_VERSION_35) {
return;
}
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
SendStreamDataToPeer(1, "foo", 0, NO_FIN, nullptr);
QuicAlarm* ack_alarm = QuicConnectionPeer::GetAckAlarm(&connection_);
// But an ack with no missing packets will not send an ack.
QuicAckFrame frame = InitAckFrame(1);
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
for (int i = 0; i < 19; ++i) {
ProcessAckPacket(&frame);
EXPECT_FALSE(ack_alarm->IsSet());
}
EXPECT_EQ(1u, writer_->packets_write_attempts());
// The 20th ack packet will cause an ack to be sent.
ProcessAckPacket(&frame);
EXPECT_EQ(2u, writer_->packets_write_attempts());
}
TEST_P(QuicConnectionTest, AckSentEveryNthPacket) {
if (connection_.version().transport_version == QUIC_VERSION_35) {
return;
}
connection_.set_ack_frequency_before_ack_decimation(3);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(39);
// Expect 13 acks, every 3rd packet.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(13);
// Receives packets 1 - 39.
for (size_t i = 1; i <= 39; ++i) {
ProcessDataPacket(i);
}
}
TEST_P(QuicConnectionTest, AckDecimationReducesAcks) {
if (GetQuicReloadableFlag(quic_enable_ack_decimation) &&
!GetQuicReloadableFlag(quic_keep_ack_decimation_reordering)) {
return;
}
EXPECT_CALL(visitor_, OnAckNeedsRetransmittableFrame()).Times(AnyNumber());
QuicConnectionPeer::SetAckMode(
&connection_, QuicConnection::ACK_DECIMATION_WITH_REORDERING);
// Start ack decimation from 10th packet.
connection_.set_min_received_before_ack_decimation(10);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(30);
// Expect 6 acks: 5 acks between packets 1-10, and ack at 20.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(6);
// Receives packets 1 - 29.
for (size_t i = 1; i <= 29; ++i) {
ProcessDataPacket(i);
}
// We now receive the 30th packet, and so we send an ack.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
ProcessDataPacket(30);
}
TEST_P(QuicConnectionTest, AckNeedsRetransmittableFrames) {
if (connection_.version().transport_version == QUIC_VERSION_35) {
return;
}
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(99);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(19);
// Receives packets 1 - 39.
for (size_t i = 1; i <= 39; ++i) {
ProcessDataPacket(i);
}
// Receiving Packet 40 causes 20th ack to send. Session is informed and adds
// WINDOW_UPDATE.
EXPECT_CALL(visitor_, OnAckNeedsRetransmittableFrame())
.WillOnce(Invoke([this]() {
connection_.SendControlFrame(
QuicFrame(new QuicWindowUpdateFrame(1, 0, 0)));
}));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
EXPECT_EQ(0u, writer_->window_update_frames().size());
ProcessDataPacket(40);
EXPECT_EQ(1u, writer_->window_update_frames().size());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(9);
// Receives packets 41 - 59.
for (size_t i = 41; i <= 59; ++i) {
ProcessDataPacket(i);
}
// Send a packet containing stream frame.
SendStreamDataToPeer(1, "bar", 0, NO_FIN, nullptr);
// Session will not be informed until receiving another 20 packets.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(19);
for (size_t i = 60; i <= 98; ++i) {
ProcessDataPacket(i);
EXPECT_EQ(0u, writer_->window_update_frames().size());
}
// Session does not add a retransmittable frame.
EXPECT_CALL(visitor_, OnAckNeedsRetransmittableFrame())
.WillOnce(Invoke([this]() {
connection_.SendControlFrame(QuicFrame(QuicPingFrame(1)));
}));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
EXPECT_EQ(0u, writer_->ping_frames().size());
ProcessDataPacket(99);
EXPECT_EQ(0u, writer_->window_update_frames().size());
// A ping frame will be added.
EXPECT_EQ(1u, writer_->ping_frames().size());
}
TEST_P(QuicConnectionTest, LeastUnackedLower) {
if (GetParam().version.transport_version > QUIC_VERSION_43) {
return;
}
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
SendStreamDataToPeer(1, "foo", 0, NO_FIN, nullptr);
SendStreamDataToPeer(1, "bar", 3, NO_FIN, nullptr);
SendStreamDataToPeer(1, "eep", 6, NO_FIN, nullptr);
// Start out saying the least unacked is 2.
QuicPacketCreatorPeer::SetPacketNumber(&peer_creator_, 5);
QuicStopWaitingFrame frame = InitStopWaitingFrame(2);
ProcessStopWaitingPacket(&frame);
// Change it to 1, but lower the packet number to fake out-of-order packets.
// This should be fine.
QuicPacketCreatorPeer::SetPacketNumber(&peer_creator_, 1);
// The scheduler will not process out of order acks, but all packet processing
// causes the connection to try to write.
if (!GetParam().no_stop_waiting) {
EXPECT_CALL(visitor_, OnCanWrite());
}
QuicStopWaitingFrame frame2 = InitStopWaitingFrame(1);
ProcessStopWaitingPacket(&frame2);
// Now claim it's one, but set the ordering so it was sent "after" the first
// one. This should cause a connection error.
QuicPacketCreatorPeer::SetPacketNumber(&peer_creator_, 7);
if (!GetParam().no_stop_waiting) {
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_INVALID_STOP_WAITING_DATA, _,
ConnectionCloseSource::FROM_SELF));
}
QuicStopWaitingFrame frame3 = InitStopWaitingFrame(1);
ProcessStopWaitingPacket(&frame3);
}
TEST_P(QuicConnectionTest, TooManySentPackets) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
QuicPacketCount max_tracked_packets = 50;
QuicConnectionPeer::SetMaxTrackedPackets(&connection_, max_tracked_packets);
const int num_packets = max_tracked_packets + 5;
for (int i = 0; i < num_packets; ++i) {
SendStreamDataToPeer(1, "foo", 3 * i, NO_FIN, nullptr);
}
// Ack packet 1, which leaves more than the limit outstanding.
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
EXPECT_CALL(visitor_,
OnConnectionClosed(QUIC_TOO_MANY_OUTSTANDING_SENT_PACKETS, _,
ConnectionCloseSource::FROM_SELF));
// Nack the first packet and ack the rest, leaving a huge gap.
QuicAckFrame frame1 = ConstructAckFrame(num_packets, 1);
ProcessAckPacket(&frame1);
}
TEST_P(QuicConnectionTest, LargestObservedLower) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
SendStreamDataToPeer(1, "foo", 0, NO_FIN, nullptr);
SendStreamDataToPeer(1, "bar", 3, NO_FIN, nullptr);
SendStreamDataToPeer(1, "eep", 6, NO_FIN, nullptr);
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
// Start out saying the largest observed is 2.
QuicAckFrame frame1 = InitAckFrame(1);
QuicAckFrame frame2 = InitAckFrame(2);
ProcessAckPacket(&frame2);
// Now change it to 1, and it should cause a connection error.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_INVALID_ACK_DATA, _,
ConnectionCloseSource::FROM_SELF));
EXPECT_CALL(visitor_, OnCanWrite()).Times(0);
ProcessAckPacket(&frame1);
}
TEST_P(QuicConnectionTest, AckUnsentData) {
// Ack a packet which has not been sent.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_INVALID_ACK_DATA, _,
ConnectionCloseSource::FROM_SELF));
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
QuicAckFrame frame = InitAckFrame(1);
EXPECT_CALL(visitor_, OnCanWrite()).Times(0);
ProcessAckPacket(&frame);
}
TEST_P(QuicConnectionTest, BasicSending) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacket(1);
QuicPacketCreatorPeer::SetPacketNumber(&peer_creator_, 2);
QuicPacketNumber last_packet;
SendStreamDataToPeer(1, "foo", 0, NO_FIN, &last_packet); // Packet 1
EXPECT_EQ(QuicPacketNumber(1u), last_packet);
SendAckPacketToPeer(); // Packet 2
if (GetParam().no_stop_waiting) {
// Expect no stop waiting frame is sent.
EXPECT_FALSE(least_unacked().IsInitialized());
} else {
EXPECT_EQ(QuicPacketNumber(1u), least_unacked());
}
SendAckPacketToPeer(); // Packet 3
if (GetParam().no_stop_waiting) {
// Expect no stop waiting frame is sent.
EXPECT_FALSE(least_unacked().IsInitialized());
} else {
EXPECT_EQ(QuicPacketNumber(1u), least_unacked());
}
SendStreamDataToPeer(1, "bar", 3, NO_FIN, &last_packet); // Packet 4
EXPECT_EQ(QuicPacketNumber(4u), last_packet);
SendAckPacketToPeer(); // Packet 5
if (GetParam().no_stop_waiting) {
// Expect no stop waiting frame is sent.
EXPECT_FALSE(least_unacked().IsInitialized());
} else {
EXPECT_EQ(QuicPacketNumber(1u), least_unacked());
}
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
// Peer acks up to packet 3.
QuicAckFrame frame = InitAckFrame(3);
ProcessAckPacket(&frame);
SendAckPacketToPeer(); // Packet 6
// As soon as we've acked one, we skip ack packets 2 and 3 and note lack of
// ack for 4.
if (GetParam().no_stop_waiting) {
// Expect no stop waiting frame is sent.
EXPECT_FALSE(least_unacked().IsInitialized());
} else {
EXPECT_EQ(QuicPacketNumber(4u), least_unacked());
}
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
// Peer acks up to packet 4, the last packet.
QuicAckFrame frame2 = InitAckFrame(6);
ProcessAckPacket(&frame2); // Acks don't instigate acks.
// Verify that we did not send an ack.
EXPECT_EQ(QuicPacketNumber(6u), writer_->header().packet_number);
// So the last ack has not changed.
if (GetParam().no_stop_waiting) {
// Expect no stop waiting frame is sent.
EXPECT_FALSE(least_unacked().IsInitialized());
} else {
EXPECT_EQ(QuicPacketNumber(4u), least_unacked());
}
// If we force an ack, we shouldn't change our retransmit state.
SendAckPacketToPeer(); // Packet 7
if (GetParam().no_stop_waiting) {
// Expect no stop waiting frame is sent.
EXPECT_FALSE(least_unacked().IsInitialized());
} else {
EXPECT_EQ(QuicPacketNumber(7u), least_unacked());
}
// But if we send more data it should.
SendStreamDataToPeer(1, "eep", 6, NO_FIN, &last_packet); // Packet 8
EXPECT_EQ(QuicPacketNumber(8u), last_packet);
SendAckPacketToPeer(); // Packet 9
if (GetParam().no_stop_waiting) {
// Expect no stop waiting frame is sent.
EXPECT_FALSE(least_unacked().IsInitialized());
} else {
EXPECT_EQ(QuicPacketNumber(7u), least_unacked());
}
}
// QuicConnection should record the packet sent-time prior to sending the
// packet.
TEST_P(QuicConnectionTest, RecordSentTimeBeforePacketSent) {
// We're using a MockClock for the tests, so we have complete control over the
// time.
// Our recorded timestamp for the last packet sent time will be passed in to
// the send_algorithm. Make sure that it is set to the correct value.
QuicTime actual_recorded_send_time = QuicTime::Zero();
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.WillOnce(SaveArg<0>(&actual_recorded_send_time));
// First send without any pause and check the result.
QuicTime expected_recorded_send_time = clock_.Now();
connection_.SendStreamDataWithString(1, "foo", 0, NO_FIN);
EXPECT_EQ(expected_recorded_send_time, actual_recorded_send_time)
<< "Expected time = " << expected_recorded_send_time.ToDebuggingValue()
<< ". Actual time = " << actual_recorded_send_time.ToDebuggingValue();
// Now pause during the write, and check the results.
actual_recorded_send_time = QuicTime::Zero();
const QuicTime::Delta write_pause_time_delta =
QuicTime::Delta::FromMilliseconds(5000);
SetWritePauseTimeDelta(write_pause_time_delta);
expected_recorded_send_time = clock_.Now();
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.WillOnce(SaveArg<0>(&actual_recorded_send_time));
connection_.SendStreamDataWithString(2, "baz", 0, NO_FIN);
EXPECT_EQ(expected_recorded_send_time, actual_recorded_send_time)
<< "Expected time = " << expected_recorded_send_time.ToDebuggingValue()
<< ". Actual time = " << actual_recorded_send_time.ToDebuggingValue();
}
TEST_P(QuicConnectionTest, FramePacking) {
// Send two stream frames in 1 packet by queueing them.
connection_.SetDefaultEncryptionLevel(ENCRYPTION_FORWARD_SECURE);
{
QuicConnection::ScopedPacketFlusher flusher(&connection_,
QuicConnection::SEND_ACK);
connection_.SendStreamData3();
connection_.SendStreamData5();
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
}
EXPECT_EQ(0u, connection_.NumQueuedPackets());
EXPECT_FALSE(connection_.HasQueuedData());
// Parse the last packet and ensure it's an ack and two stream frames from
// two different streams.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
}
EXPECT_TRUE(writer_->ack_frames().empty());
ASSERT_EQ(2u, writer_->stream_frames().size());
EXPECT_EQ(GetNthClientInitiatedStreamId(1, connection_.transport_version()),
writer_->stream_frames()[0]->stream_id);
EXPECT_EQ(GetNthClientInitiatedStreamId(2, connection_.transport_version()),
writer_->stream_frames()[1]->stream_id);
}
TEST_P(QuicConnectionTest, FramePackingNonCryptoThenCrypto) {
// Send two stream frames (one non-crypto, then one crypto) in 2 packets by
// queueing them.
connection_.SetDefaultEncryptionLevel(ENCRYPTION_FORWARD_SECURE);
{
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(2);
QuicConnection::ScopedPacketFlusher flusher(&connection_,
QuicConnection::SEND_ACK);
connection_.SendStreamData3();
connection_.SendCryptoStreamData();
}
EXPECT_EQ(0u, connection_.NumQueuedPackets());
EXPECT_FALSE(connection_.HasQueuedData());
// Parse the last packet and ensure it's the crypto stream frame.
EXPECT_EQ(2u, writer_->frame_count());
ASSERT_EQ(1u, writer_->stream_frames().size());
ASSERT_EQ(1u, writer_->padding_frames().size());
EXPECT_EQ(QuicUtils::GetCryptoStreamId(connection_.transport_version()),
writer_->stream_frames()[0]->stream_id);
}
TEST_P(QuicConnectionTest, FramePackingCryptoThenNonCrypto) {
// Send two stream frames (one crypto, then one non-crypto) in 2 packets by
// queueing them.
{
connection_.SetDefaultEncryptionLevel(ENCRYPTION_FORWARD_SECURE);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(2);
QuicConnection::ScopedPacketFlusher flusher(&connection_,
QuicConnection::SEND_ACK);
connection_.SendCryptoStreamData();
connection_.SendStreamData3();
}
EXPECT_EQ(0u, connection_.NumQueuedPackets());
EXPECT_FALSE(connection_.HasQueuedData());
// Parse the last packet and ensure it's the stream frame from stream 3.
EXPECT_EQ(1u, writer_->frame_count());
ASSERT_EQ(1u, writer_->stream_frames().size());
EXPECT_EQ(GetNthClientInitiatedStreamId(1, connection_.transport_version()),
writer_->stream_frames()[0]->stream_id);
}
TEST_P(QuicConnectionTest, FramePackingAckResponse) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Process a data packet to queue up a pending ack.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacket(1);
QuicPacketNumber last_packet;
SendStreamDataToPeer(1, "foo", 0, NO_FIN, &last_packet);
// Verify ack is bundled with outging packet.
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_CALL(visitor_, OnCanWrite())
.WillOnce(DoAll(IgnoreResult(InvokeWithoutArgs(
&connection_, &TestConnection::SendStreamData3)),
IgnoreResult(InvokeWithoutArgs(
&connection_, &TestConnection::SendStreamData5))));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
// Process a data packet to cause the visitor's OnCanWrite to be invoked.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacket(2);
EXPECT_EQ(0u, connection_.NumQueuedPackets());
EXPECT_FALSE(connection_.HasQueuedData());
// Parse the last packet and ensure it's an ack and two stream frames from
// two different streams.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(3u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(4u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
ASSERT_EQ(2u, writer_->stream_frames().size());
EXPECT_EQ(GetNthClientInitiatedStreamId(1, connection_.transport_version()),
writer_->stream_frames()[0]->stream_id);
EXPECT_EQ(GetNthClientInitiatedStreamId(2, connection_.transport_version()),
writer_->stream_frames()[1]->stream_id);
}
TEST_P(QuicConnectionTest, FramePackingSendv) {
// Send data in 1 packet by writing multiple blocks in a single iovector
// using writev.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
char data[] = "ABCDEF";
struct iovec iov[2];
iov[0].iov_base = data;
iov[0].iov_len = 4;
iov[1].iov_base = data + 4;
iov[1].iov_len = 2;
connection_.SaveAndSendStreamData(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), iov, 2, 6,
0, NO_FIN);
EXPECT_EQ(0u, connection_.NumQueuedPackets());
EXPECT_FALSE(connection_.HasQueuedData());
// Parse the last packet and ensure multiple iovector blocks have
// been packed into a single stream frame from one stream.
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_EQ(1u, writer_->stream_frames().size());
EXPECT_EQ(1u, writer_->padding_frames().size());
QuicStreamFrame* frame = writer_->stream_frames()[0].get();
EXPECT_EQ(QuicUtils::GetCryptoStreamId(connection_.transport_version()),
frame->stream_id);
EXPECT_EQ("ABCDEF", QuicStringPiece(frame->data_buffer, frame->data_length));
}
TEST_P(QuicConnectionTest, FramePackingSendvQueued) {
// Try to send two stream frames in 1 packet by using writev.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
BlockOnNextWrite();
char data[] = "ABCDEF";
struct iovec iov[2];
iov[0].iov_base = data;
iov[0].iov_len = 4;
iov[1].iov_base = data + 4;
iov[1].iov_len = 2;
connection_.SaveAndSendStreamData(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), iov, 2, 6,
0, NO_FIN);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
EXPECT_TRUE(connection_.HasQueuedData());
// Unblock the writes and actually send.
writer_->SetWritable();
connection_.OnCanWrite();
EXPECT_EQ(0u, connection_.NumQueuedPackets());
// Parse the last packet and ensure it's one stream frame from one stream.
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_EQ(1u, writer_->stream_frames().size());
EXPECT_EQ(1u, writer_->padding_frames().size());
EXPECT_EQ(QuicUtils::GetCryptoStreamId(connection_.transport_version()),
writer_->stream_frames()[0]->stream_id);
}
TEST_P(QuicConnectionTest, SendingZeroBytes) {
connection_.SetDefaultEncryptionLevel(ENCRYPTION_FORWARD_SECURE);
// Send a zero byte write with a fin using writev.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
connection_.SaveAndSendStreamData(
QuicUtils::GetHeadersStreamId(connection_.transport_version()), nullptr,
0, 0, 0, FIN);
EXPECT_EQ(0u, connection_.NumQueuedPackets());
EXPECT_FALSE(connection_.HasQueuedData());
// Parse the last packet and ensure it's one stream frame from one stream.
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_EQ(1u, writer_->stream_frames().size());
EXPECT_EQ(QuicUtils::GetHeadersStreamId(connection_.transport_version()),
writer_->stream_frames()[0]->stream_id);
EXPECT_TRUE(writer_->stream_frames()[0]->fin);
}
TEST_P(QuicConnectionTest, LargeSendWithPendingAck) {
connection_.SetDefaultEncryptionLevel(ENCRYPTION_FORWARD_SECURE);
// Set the ack alarm by processing a ping frame.
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Processs a PING frame.
ProcessFramePacket(QuicFrame(QuicPingFrame()));
// Ensure that this has caused the ACK alarm to be set.
QuicAlarm* ack_alarm = QuicConnectionPeer::GetAckAlarm(&connection_);
EXPECT_TRUE(ack_alarm->IsSet());
// Send data and ensure the ack is bundled.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(8);
size_t len = 10000;
std::unique_ptr<char[]> data_array(new char[len]);
memset(data_array.get(), '?', len);
struct iovec iov;
iov.iov_base = data_array.get();
iov.iov_len = len;
QuicConsumedData consumed = connection_.SaveAndSendStreamData(
QuicUtils::GetHeadersStreamId(connection_.transport_version()), &iov, 1,
len, 0, FIN);
EXPECT_EQ(len, consumed.bytes_consumed);
EXPECT_TRUE(consumed.fin_consumed);
EXPECT_EQ(0u, connection_.NumQueuedPackets());
EXPECT_FALSE(connection_.HasQueuedData());
// Parse the last packet and ensure it's one stream frame with a fin.
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_EQ(1u, writer_->stream_frames().size());
EXPECT_EQ(QuicUtils::GetHeadersStreamId(connection_.transport_version()),
writer_->stream_frames()[0]->stream_id);
EXPECT_TRUE(writer_->stream_frames()[0]->fin);
// Ensure the ack alarm was cancelled when the ack was sent.
EXPECT_FALSE(ack_alarm->IsSet());
}
TEST_P(QuicConnectionTest, OnCanWrite) {
// Visitor's OnCanWrite will send data, but will have more pending writes.
EXPECT_CALL(visitor_, OnCanWrite())
.WillOnce(DoAll(IgnoreResult(InvokeWithoutArgs(
&connection_, &TestConnection::SendStreamData3)),
IgnoreResult(InvokeWithoutArgs(
&connection_, &TestConnection::SendStreamData5))));
{
InSequence seq;
EXPECT_CALL(visitor_, WillingAndAbleToWrite()).WillOnce(Return(true));
EXPECT_CALL(visitor_, WillingAndAbleToWrite())
.WillRepeatedly(Return(false));
}
EXPECT_CALL(*send_algorithm_, CanSend(_))
.WillRepeatedly(testing::Return(true));
connection_.OnCanWrite();
// Parse the last packet and ensure it's the two stream frames from
// two different streams.
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_EQ(2u, writer_->stream_frames().size());
EXPECT_EQ(GetNthClientInitiatedStreamId(1, connection_.transport_version()),
writer_->stream_frames()[0]->stream_id);
EXPECT_EQ(GetNthClientInitiatedStreamId(2, connection_.transport_version()),
writer_->stream_frames()[1]->stream_id);
}
TEST_P(QuicConnectionTest, RetransmitOnNack) {
QuicPacketNumber last_packet;
QuicByteCount second_packet_size;
SendStreamDataToPeer(3, "foo", 0, NO_FIN, &last_packet); // Packet 1
second_packet_size =
SendStreamDataToPeer(3, "foos", 3, NO_FIN, &last_packet); // Packet 2
SendStreamDataToPeer(3, "fooos", 7, NO_FIN, &last_packet); // Packet 3
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Don't lose a packet on an ack, and nothing is retransmitted.
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
QuicAckFrame ack_one = InitAckFrame(1);
ProcessAckPacket(&ack_one);
// Lose a packet and ensure it triggers retransmission.
QuicAckFrame nack_two = ConstructAckFrame(3, 2);
LostPacketVector lost_packets;
lost_packets.push_back(LostPacket(QuicPacketNumber(2), kMaxPacketSize));
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _))
.WillOnce(SetArgPointee<5>(lost_packets));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
EXPECT_FALSE(QuicPacketCreatorPeer::SendVersionInPacket(creator_));
ProcessAckPacket(&nack_two);
}
TEST_P(QuicConnectionTest, DoNotSendQueuedPacketForResetStream) {
// Block the connection to queue the packet.
BlockOnNextWrite();
QuicStreamId stream_id = 2;
connection_.SendStreamDataWithString(stream_id, "foo", 0, NO_FIN);
// Now that there is a queued packet, reset the stream.
SendRstStream(stream_id, QUIC_ERROR_PROCESSING_STREAM, 3);
// Unblock the connection and verify that only the RST_STREAM is sent.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
writer_->SetWritable();
connection_.OnCanWrite();
if (!connection_.session_decides_what_to_write()) {
// OnCanWrite will cause RST_STREAM be sent again.
connection_.SendControlFrame(QuicFrame(new QuicRstStreamFrame(
1, stream_id, QUIC_ERROR_PROCESSING_STREAM, 14)));
}
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_EQ(1u, writer_->rst_stream_frames().size());
}
TEST_P(QuicConnectionTest, SendQueuedPacketForQuicRstStreamNoError) {
// Block the connection to queue the packet.
BlockOnNextWrite();
QuicStreamId stream_id = 2;
connection_.SendStreamDataWithString(stream_id, "foo", 0, NO_FIN);
// Now that there is a queued packet, reset the stream.
SendRstStream(stream_id, QUIC_STREAM_NO_ERROR, 3);
// Unblock the connection and verify that the RST_STREAM is sent and the data
// packet is sent.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(AtLeast(2));
writer_->SetWritable();
connection_.OnCanWrite();
if (!connection_.session_decides_what_to_write()) {
// OnCanWrite will cause RST_STREAM be sent again.
connection_.SendControlFrame(QuicFrame(
new QuicRstStreamFrame(1, stream_id, QUIC_STREAM_NO_ERROR, 14)));
}
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_EQ(1u, writer_->rst_stream_frames().size());
}
TEST_P(QuicConnectionTest, DoNotRetransmitForResetStreamOnNack) {
QuicStreamId stream_id = 2;
QuicPacketNumber last_packet;
SendStreamDataToPeer(stream_id, "foo", 0, NO_FIN, &last_packet);
SendStreamDataToPeer(stream_id, "foos", 3, NO_FIN, &last_packet);
SendStreamDataToPeer(stream_id, "fooos", 7, NO_FIN, &last_packet);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
SendRstStream(stream_id, QUIC_ERROR_PROCESSING_STREAM, 12);
// Lose a packet and ensure it does not trigger retransmission.
QuicAckFrame nack_two = ConstructAckFrame(last_packet, last_packet - 1);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(0);
ProcessAckPacket(&nack_two);
}
TEST_P(QuicConnectionTest, RetransmitForQuicRstStreamNoErrorOnNack) {
QuicStreamId stream_id = 2;
QuicPacketNumber last_packet;
SendStreamDataToPeer(stream_id, "foo", 0, NO_FIN, &last_packet);
SendStreamDataToPeer(stream_id, "foos", 3, NO_FIN, &last_packet);
SendStreamDataToPeer(stream_id, "fooos", 7, NO_FIN, &last_packet);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
SendRstStream(stream_id, QUIC_STREAM_NO_ERROR, 12);
// Lose a packet, ensure it triggers retransmission.
QuicAckFrame nack_two = ConstructAckFrame(last_packet, last_packet - 1);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
LostPacketVector lost_packets;
lost_packets.push_back(LostPacket(last_packet - 1, kMaxPacketSize));
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _))
.WillOnce(SetArgPointee<5>(lost_packets));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(AtLeast(1));
ProcessAckPacket(&nack_two);
}
TEST_P(QuicConnectionTest, DoNotRetransmitForResetStreamOnRTO) {
QuicStreamId stream_id = 2;
QuicPacketNumber last_packet;
SendStreamDataToPeer(stream_id, "foo", 0, NO_FIN, &last_packet);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
SendRstStream(stream_id, QUIC_ERROR_PROCESSING_STREAM, 3);
// Fire the RTO and verify that the RST_STREAM is resent, not stream data.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
clock_.AdvanceTime(DefaultRetransmissionTime());
connection_.GetRetransmissionAlarm()->Fire();
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_EQ(1u, writer_->rst_stream_frames().size());
EXPECT_EQ(stream_id, writer_->rst_stream_frames().front().stream_id);
}
// Ensure that if the only data in flight is non-retransmittable, the
// retransmission alarm is not set.
TEST_P(QuicConnectionTest, CancelRetransmissionAlarmAfterResetStream) {
QuicStreamId stream_id = 2;
QuicPacketNumber last_data_packet;
SendStreamDataToPeer(stream_id, "foo", 0, NO_FIN, &last_data_packet);
// Cancel the stream.
const QuicPacketNumber rst_packet = last_data_packet + 1;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, rst_packet, _, _)).Times(1);
SendRstStream(stream_id, QUIC_ERROR_PROCESSING_STREAM, 3);
// Ack the RST_STREAM frame (since it's retransmittable), but not the data
// packet, which is no longer retransmittable since the stream was cancelled.
QuicAckFrame nack_stream_data =
ConstructAckFrame(rst_packet, last_data_packet);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(0);
ProcessAckPacket(&nack_stream_data);
// Ensure that the data is still in flight, but the retransmission alarm is no
// longer set.
EXPECT_GT(QuicSentPacketManagerPeer::GetBytesInFlight(manager_), 0u);
if (GetQuicReloadableFlag(quic_optimize_inflight_check)) {
EXPECT_TRUE(connection_.GetRetransmissionAlarm()->IsSet());
// Firing the alarm should remove all bytes_in_flight.
connection_.GetRetransmissionAlarm()->Fire();
EXPECT_EQ(0u, QuicSentPacketManagerPeer::GetBytesInFlight(manager_));
}
EXPECT_FALSE(connection_.GetRetransmissionAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, RetransmitForQuicRstStreamNoErrorOnRTO) {
connection_.SetMaxTailLossProbes(0);
QuicStreamId stream_id = 2;
QuicPacketNumber last_packet;
SendStreamDataToPeer(stream_id, "foo", 0, NO_FIN, &last_packet);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
SendRstStream(stream_id, QUIC_STREAM_NO_ERROR, 3);
// Fire the RTO and verify that the RST_STREAM is resent, the stream data
// is sent.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(AtLeast(2));
clock_.AdvanceTime(DefaultRetransmissionTime());
connection_.GetRetransmissionAlarm()->Fire();
EXPECT_EQ(1u, writer_->frame_count());
ASSERT_EQ(1u, writer_->rst_stream_frames().size());
EXPECT_EQ(stream_id, writer_->rst_stream_frames().front().stream_id);
}
TEST_P(QuicConnectionTest, DoNotSendPendingRetransmissionForResetStream) {
QuicStreamId stream_id = 2;
QuicPacketNumber last_packet;
SendStreamDataToPeer(stream_id, "foo", 0, NO_FIN, &last_packet);
SendStreamDataToPeer(stream_id, "foos", 3, NO_FIN, &last_packet);
BlockOnNextWrite();
connection_.SendStreamDataWithString(stream_id, "fooos", 7, NO_FIN);
// Lose a packet which will trigger a pending retransmission.
QuicAckFrame ack = ConstructAckFrame(last_packet, last_packet - 1);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(0);
ProcessAckPacket(&ack);
SendRstStream(stream_id, QUIC_ERROR_PROCESSING_STREAM, 12);
// Unblock the connection and verify that the RST_STREAM is sent but not the
// second data packet nor a retransmit.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
writer_->SetWritable();
connection_.OnCanWrite();
if (!connection_.session_decides_what_to_write()) {
// OnCanWrite will cause this RST_STREAM_FRAME be sent again.
connection_.SendControlFrame(QuicFrame(new QuicRstStreamFrame(
1, stream_id, QUIC_ERROR_PROCESSING_STREAM, 14)));
}
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_EQ(1u, writer_->rst_stream_frames().size());
EXPECT_EQ(stream_id, writer_->rst_stream_frames().front().stream_id);
}
TEST_P(QuicConnectionTest, SendPendingRetransmissionForQuicRstStreamNoError) {
QuicStreamId stream_id = 2;
QuicPacketNumber last_packet;
SendStreamDataToPeer(stream_id, "foo", 0, NO_FIN, &last_packet);
SendStreamDataToPeer(stream_id, "foos", 3, NO_FIN, &last_packet);
BlockOnNextWrite();
connection_.SendStreamDataWithString(stream_id, "fooos", 7, NO_FIN);
// Lose a packet which will trigger a pending retransmission.
QuicAckFrame ack = ConstructAckFrame(last_packet, last_packet - 1);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
LostPacketVector lost_packets;
lost_packets.push_back(LostPacket(last_packet - 1, kMaxPacketSize));
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _))
.WillOnce(SetArgPointee<5>(lost_packets));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(0);
ProcessAckPacket(&ack);
SendRstStream(stream_id, QUIC_STREAM_NO_ERROR, 12);
// Unblock the connection and verify that the RST_STREAM is sent and the
// second data packet or a retransmit is sent.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(AtLeast(2));
writer_->SetWritable();
connection_.OnCanWrite();
// The RST_STREAM_FRAME is sent after queued packets and pending
// retransmission.
connection_.SendControlFrame(QuicFrame(
new QuicRstStreamFrame(1, stream_id, QUIC_STREAM_NO_ERROR, 14)));
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_EQ(1u, writer_->rst_stream_frames().size());
}
TEST_P(QuicConnectionTest, RetransmitAckedPacket) {
QuicPacketNumber last_packet;
SendStreamDataToPeer(1, "foo", 0, NO_FIN, &last_packet); // Packet 1
SendStreamDataToPeer(1, "foos", 3, NO_FIN, &last_packet); // Packet 2
SendStreamDataToPeer(1, "fooos", 7, NO_FIN, &last_packet); // Packet 3
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Instigate a loss with an ack.
QuicAckFrame nack_two = ConstructAckFrame(3, 2);
// The first nack should trigger a fast retransmission, but we'll be
// write blocked, so the packet will be queued.
BlockOnNextWrite();
LostPacketVector lost_packets;
lost_packets.push_back(LostPacket(QuicPacketNumber(2), kMaxPacketSize));
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _))
.WillOnce(SetArgPointee<5>(lost_packets));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
ProcessAckPacket(&nack_two);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
// Now, ack the previous transmission.
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(false, _, _, _, _));
QuicAckFrame ack_all = InitAckFrame(3);
ProcessAckPacket(&ack_all);
// Unblock the socket and attempt to send the queued packets. We will always
// send the retransmission.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, QuicPacketNumber(4), _, _))
.Times(1);
writer_->SetWritable();
connection_.OnCanWrite();
EXPECT_EQ(0u, connection_.NumQueuedPackets());
// We do not store retransmittable frames of this retransmission.
EXPECT_FALSE(QuicConnectionPeer::HasRetransmittableFrames(&connection_, 4));
}
TEST_P(QuicConnectionTest, RetransmitNackedLargestObserved) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
QuicPacketNumber original, second;
QuicByteCount packet_size =
SendStreamDataToPeer(3, "foo", 0, NO_FIN, &original); // 1st packet.
SendStreamDataToPeer(3, "bar", 3, NO_FIN, &second); // 2nd packet.
QuicAckFrame frame = InitAckFrame({{second, second + 1}});
// The first nack should retransmit the largest observed packet.
LostPacketVector lost_packets;
lost_packets.push_back(LostPacket(original, kMaxPacketSize));
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _))
.WillOnce(SetArgPointee<5>(lost_packets));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
// Packet 1 is short header for IETF QUIC because the encryption level
// switched to ENCRYPTION_FORWARD_SECURE in SendStreamDataToPeer.
EXPECT_CALL(
*send_algorithm_,
OnPacketSent(_, _, _,
GetParam().version.transport_version > QUIC_VERSION_43
? packet_size
: packet_size - kQuicVersionSize,
_));
ProcessAckPacket(&frame);
}
TEST_P(QuicConnectionTest, QueueAfterTwoRTOs) {
connection_.SetMaxTailLossProbes(0);
for (int i = 0; i < 10; ++i) {
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
connection_.SendStreamDataWithString(3, "foo", i * 3, NO_FIN);
}
// Block the writer and ensure they're queued.
BlockOnNextWrite();
clock_.AdvanceTime(DefaultRetransmissionTime());
// Only one packet should be retransmitted.
connection_.GetRetransmissionAlarm()->Fire();
EXPECT_TRUE(connection_.HasQueuedData());
// Unblock the writer.
writer_->SetWritable();
clock_.AdvanceTime(QuicTime::Delta::FromMicroseconds(
2 * DefaultRetransmissionTime().ToMicroseconds()));
// Retransmit already retransmitted packets event though the packet number
// greater than the largest observed.
if (connection_.session_decides_what_to_write()) {
// 2 RTOs + 1 TLP.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(3);
} else {
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(2);
}
connection_.GetRetransmissionAlarm()->Fire();
connection_.OnCanWrite();
}
TEST_P(QuicConnectionTest, WriteBlockedBufferedThenSent) {
BlockOnNextWrite();
writer_->set_is_write_blocked_data_buffered(true);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
connection_.SendStreamDataWithString(1, "foo", 0, NO_FIN);
EXPECT_TRUE(connection_.GetRetransmissionAlarm()->IsSet());
writer_->SetWritable();
connection_.OnCanWrite();
EXPECT_TRUE(connection_.GetRetransmissionAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, WriteBlockedThenSent) {
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(0);
BlockOnNextWrite();
connection_.SendStreamDataWithString(1, "foo", 0, NO_FIN);
EXPECT_FALSE(connection_.GetRetransmissionAlarm()->IsSet());
EXPECT_EQ(1u, connection_.NumQueuedPackets());
// The second packet should also be queued, in order to ensure packets are
// never sent out of order.
writer_->SetWritable();
connection_.SendStreamDataWithString(1, "foo", 0, NO_FIN);
EXPECT_EQ(2u, connection_.NumQueuedPackets());
// Now both are sent in order when we unblock.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(2);
connection_.OnCanWrite();
EXPECT_TRUE(connection_.GetRetransmissionAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, RetransmitWriteBlockedAckedOriginalThenSent) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
connection_.SendStreamDataWithString(3, "foo", 0, NO_FIN);
EXPECT_TRUE(connection_.GetRetransmissionAlarm()->IsSet());
BlockOnNextWrite();
writer_->set_is_write_blocked_data_buffered(true);
// Simulate the retransmission alarm firing.
clock_.AdvanceTime(DefaultRetransmissionTime());
connection_.GetRetransmissionAlarm()->Fire();
// Ack the sent packet before the callback returns, which happens in
// rare circumstances with write blocked sockets.
QuicAckFrame ack = InitAckFrame(1);
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
ProcessAckPacket(&ack);
writer_->SetWritable();
connection_.OnCanWrite();
// There is now a pending packet, but with no retransmittable frames.
if (GetQuicReloadableFlag(quic_optimize_inflight_check)) {
EXPECT_TRUE(connection_.GetRetransmissionAlarm()->IsSet());
// Firing the alarm should remove all bytes_in_flight.
connection_.GetRetransmissionAlarm()->Fire();
EXPECT_EQ(0u, QuicSentPacketManagerPeer::GetBytesInFlight(manager_));
}
EXPECT_FALSE(connection_.GetRetransmissionAlarm()->IsSet());
EXPECT_FALSE(QuicConnectionPeer::HasRetransmittableFrames(&connection_, 2));
}
TEST_P(QuicConnectionTest, AlarmsWhenWriteBlocked) {
// Block the connection.
BlockOnNextWrite();
connection_.SendStreamDataWithString(3, "foo", 0, NO_FIN);
EXPECT_EQ(1u, writer_->packets_write_attempts());
EXPECT_TRUE(writer_->IsWriteBlocked());
// Set the send alarm. Fire the alarm and ensure it doesn't attempt to write.
connection_.GetSendAlarm()->Set(clock_.ApproximateNow());
connection_.GetSendAlarm()->Fire();
EXPECT_TRUE(writer_->IsWriteBlocked());
EXPECT_EQ(1u, writer_->packets_write_attempts());
}
TEST_P(QuicConnectionTest, NoSendAlarmAfterProcessPacketWhenWriteBlocked) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Block the connection.
BlockOnNextWrite();
connection_.SendStreamDataWithString(3, "foo", 0, NO_FIN);
EXPECT_TRUE(writer_->IsWriteBlocked());
EXPECT_EQ(1u, connection_.NumQueuedPackets());
EXPECT_FALSE(connection_.GetSendAlarm()->IsSet());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
// Process packet number 1. Can not call ProcessPacket or ProcessDataPacket
// here, because they will fire the alarm after QuicConnection::ProcessPacket
// is returned.
const uint64_t received_packet_num = 1;
const bool has_stop_waiting = false;
const EncryptionLevel level = ENCRYPTION_NONE;
std::unique_ptr<QuicPacket> packet(
ConstructDataPacket(received_packet_num, has_stop_waiting));
char buffer[kMaxPacketSize];
size_t encrypted_length =
peer_framer_.EncryptPayload(level, QuicPacketNumber(received_packet_num),
*packet, buffer, kMaxPacketSize);
connection_.ProcessUdpPacket(
kSelfAddress, kPeerAddress,
QuicReceivedPacket(buffer, encrypted_length, clock_.Now(), false));
EXPECT_TRUE(writer_->IsWriteBlocked());
EXPECT_FALSE(connection_.GetSendAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, AddToWriteBlockedListIfWriterBlockedWhenProcessing) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
SendStreamDataToPeer(1, "foo", 0, NO_FIN, nullptr);
// Simulate the case where a shared writer gets blocked by another connection.
writer_->SetWriteBlocked();
// Process an ACK, make sure the connection calls visitor_->OnWriteBlocked().
QuicAckFrame ack1 = InitAckFrame(1);
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(_, _, _, _, _));
EXPECT_CALL(visitor_, OnWriteBlocked()).Times(1);
ProcessAckPacket(1, &ack1);
}
TEST_P(QuicConnectionTest, DoNotAddToWriteBlockedListAfterDisconnect) {
writer_->SetBatchMode(true);
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_PEER_GOING_AWAY, _,
ConnectionCloseSource::FROM_SELF));
if (GetQuicRestartFlag(quic_check_blocked_writer_for_blockage)) {
EXPECT_CALL(visitor_, OnWriteBlocked()).Times(0);
} else {
EXPECT_CALL(visitor_, OnWriteBlocked()).Times(1);
}
{
QuicConnection::ScopedPacketFlusher flusher(&connection_,
QuicConnection::NO_ACK);
connection_.CloseConnection(QUIC_PEER_GOING_AWAY, "no reason",
ConnectionCloseBehavior::SILENT_CLOSE);
EXPECT_FALSE(connection_.connected());
writer_->SetWriteBlocked();
}
}
TEST_P(QuicConnectionTest, AddToWriteBlockedListIfBlockedOnFlushPackets) {
writer_->SetBatchMode(true);
writer_->BlockOnNextFlush();
EXPECT_CALL(visitor_, OnWriteBlocked()).Times(1);
{
QuicConnection::ScopedPacketFlusher flusher(&connection_,
QuicConnection::NO_ACK);
// flusher's destructor will call connection_.FlushPackets, which should add
// the connection to the write blocked list.
}
}
TEST_P(QuicConnectionTest, NoLimitPacketsPerNack) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
int offset = 0;
// Send packets 1 to 15.
for (int i = 0; i < 15; ++i) {
SendStreamDataToPeer(1, "foo", offset, NO_FIN, nullptr);
offset += 3;
}
// Ack 15, nack 1-14.
QuicAckFrame nack =
InitAckFrame({{QuicPacketNumber(15), QuicPacketNumber(16)}});
// 14 packets have been NACK'd and lost.
LostPacketVector lost_packets;
for (int i = 1; i < 15; ++i) {
lost_packets.push_back(LostPacket(QuicPacketNumber(i), kMaxPacketSize));
}
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _))
.WillOnce(SetArgPointee<5>(lost_packets));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
if (connection_.session_decides_what_to_write()) {
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
} else {
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(14);
}
ProcessAckPacket(&nack);
}
// Test sending multiple acks from the connection to the session.
TEST_P(QuicConnectionTest, MultipleAcks) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacket(1);
QuicPacketCreatorPeer::SetPacketNumber(&peer_creator_, 2);
QuicPacketNumber last_packet;
SendStreamDataToPeer(1, "foo", 0, NO_FIN, &last_packet); // Packet 1
EXPECT_EQ(QuicPacketNumber(1u), last_packet);
SendStreamDataToPeer(3, "foo", 0, NO_FIN, &last_packet); // Packet 2
EXPECT_EQ(QuicPacketNumber(2u), last_packet);
SendAckPacketToPeer(); // Packet 3
SendStreamDataToPeer(5, "foo", 0, NO_FIN, &last_packet); // Packet 4
EXPECT_EQ(QuicPacketNumber(4u), last_packet);
SendStreamDataToPeer(1, "foo", 3, NO_FIN, &last_packet); // Packet 5
EXPECT_EQ(QuicPacketNumber(5u), last_packet);
SendStreamDataToPeer(3, "foo", 3, NO_FIN, &last_packet); // Packet 6
EXPECT_EQ(QuicPacketNumber(6u), last_packet);
// Client will ack packets 1, 2, [!3], 4, 5.
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
QuicAckFrame frame1 = ConstructAckFrame(5, 3);
ProcessAckPacket(&frame1);
// Now the client implicitly acks 3, and explicitly acks 6.
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
QuicAckFrame frame2 = InitAckFrame(6);
ProcessAckPacket(&frame2);
}
TEST_P(QuicConnectionTest, DontLatchUnackedPacket) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacket(1);
QuicPacketCreatorPeer::SetPacketNumber(&peer_creator_, 2);
SendStreamDataToPeer(1, "foo", 0, NO_FIN, nullptr); // Packet 1;
// From now on, we send acks, so the send algorithm won't mark them pending.
SendAckPacketToPeer(); // Packet 2
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
QuicAckFrame frame = InitAckFrame(1);
ProcessAckPacket(&frame);
// Verify that our internal state has least-unacked as 2, because we're still
// waiting for a potential ack for 2.
EXPECT_EQ(QuicPacketNumber(2u), stop_waiting()->least_unacked);
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
frame = InitAckFrame(2);
ProcessAckPacket(&frame);
EXPECT_EQ(QuicPacketNumber(3u), stop_waiting()->least_unacked);
// When we send an ack, we make sure our least-unacked makes sense. In this
// case since we're not waiting on an ack for 2 and all packets are acked, we
// set it to 3.
SendAckPacketToPeer(); // Packet 3
// Least_unacked remains at 3 until another ack is received.
EXPECT_EQ(QuicPacketNumber(3u), stop_waiting()->least_unacked);
if (GetParam().no_stop_waiting) {
// Expect no stop waiting frame is sent.
EXPECT_FALSE(least_unacked().IsInitialized());
} else {
// Check that the outgoing ack had its packet number as least_unacked.
EXPECT_EQ(QuicPacketNumber(3u), least_unacked());
}
// Ack the ack, which updates the rtt and raises the least unacked.
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
frame = InitAckFrame(3);
ProcessAckPacket(&frame);
SendStreamDataToPeer(1, "bar", 3, NO_FIN, nullptr); // Packet 4
EXPECT_EQ(QuicPacketNumber(4u), stop_waiting()->least_unacked);
SendAckPacketToPeer(); // Packet 5
if (GetParam().no_stop_waiting) {
// Expect no stop waiting frame is sent.
EXPECT_FALSE(least_unacked().IsInitialized());
} else {
EXPECT_EQ(QuicPacketNumber(4u), least_unacked());
}
// Send two data packets at the end, and ensure if the last one is acked,
// the least unacked is raised above the ack packets.
SendStreamDataToPeer(1, "bar", 6, NO_FIN, nullptr); // Packet 6
SendStreamDataToPeer(1, "bar", 9, NO_FIN, nullptr); // Packet 7
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
frame = InitAckFrame({{QuicPacketNumber(1), QuicPacketNumber(5)},
{QuicPacketNumber(7), QuicPacketNumber(8)}});
ProcessAckPacket(&frame);
EXPECT_EQ(QuicPacketNumber(6u), stop_waiting()->least_unacked);
}
TEST_P(QuicConnectionTest, TLP) {
connection_.SetMaxTailLossProbes(1);
SendStreamDataToPeer(3, "foo", 0, NO_FIN, nullptr);
EXPECT_EQ(QuicPacketNumber(1u), stop_waiting()->least_unacked);
QuicTime retransmission_time =
connection_.GetRetransmissionAlarm()->deadline();
EXPECT_NE(QuicTime::Zero(), retransmission_time);
EXPECT_EQ(QuicPacketNumber(1u), writer_->header().packet_number);
// Simulate the retransmission alarm firing and sending a tlp,
// so send algorithm's OnRetransmissionTimeout is not called.
clock_.AdvanceTime(retransmission_time - clock_.Now());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, QuicPacketNumber(2), _, _));
connection_.GetRetransmissionAlarm()->Fire();
EXPECT_EQ(QuicPacketNumber(2u), writer_->header().packet_number);
// We do not raise the high water mark yet.
EXPECT_EQ(QuicPacketNumber(1u), stop_waiting()->least_unacked);
}
TEST_P(QuicConnectionTest, RTO) {
connection_.SetMaxTailLossProbes(0);
QuicTime default_retransmission_time =
clock_.ApproximateNow() + DefaultRetransmissionTime();
SendStreamDataToPeer(3, "foo", 0, NO_FIN, nullptr);
EXPECT_EQ(QuicPacketNumber(1u), stop_waiting()->least_unacked);
EXPECT_EQ(QuicPacketNumber(1u), writer_->header().packet_number);
EXPECT_EQ(default_retransmission_time,
connection_.GetRetransmissionAlarm()->deadline());
// Simulate the retransmission alarm firing.
clock_.AdvanceTime(DefaultRetransmissionTime());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, QuicPacketNumber(2), _, _));
connection_.GetRetransmissionAlarm()->Fire();
EXPECT_EQ(QuicPacketNumber(2u), writer_->header().packet_number);
// We do not raise the high water mark yet.
EXPECT_EQ(QuicPacketNumber(1u), stop_waiting()->least_unacked);
}
TEST_P(QuicConnectionTest, RetransmitWithSameEncryptionLevel) {
use_tagging_decrypter();
// A TaggingEncrypter puts kTagSize copies of the given byte (0x01 here) at
// the end of the packet. We can test this to check which encrypter was used.
connection_.SetEncrypter(ENCRYPTION_NONE,
QuicMakeUnique<TaggingEncrypter>(0x01));
SendStreamDataToPeer(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), "foo", 0,
NO_FIN, nullptr);
EXPECT_EQ(0x01010101u, writer_->final_bytes_of_last_packet());
connection_.SetEncrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<TaggingEncrypter>(0x02));
connection_.SetDefaultEncryptionLevel(ENCRYPTION_INITIAL);
SendStreamDataToPeer(3, "foo", 0, NO_FIN, nullptr);
EXPECT_EQ(0x02020202u, writer_->final_bytes_of_last_packet());
{
InSequence s;
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, QuicPacketNumber(3), _, _));
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, QuicPacketNumber(4), _, _));
}
// Manually mark both packets for retransmission.
connection_.RetransmitUnackedPackets(ALL_UNACKED_RETRANSMISSION);
// Packet should have been sent with ENCRYPTION_NONE.
EXPECT_EQ(0x01010101u, writer_->final_bytes_of_previous_packet());
// Packet should have been sent with ENCRYPTION_INITIAL.
EXPECT_EQ(0x02020202u, writer_->final_bytes_of_last_packet());
}
TEST_P(QuicConnectionTest, SendHandshakeMessages) {
use_tagging_decrypter();
// A TaggingEncrypter puts kTagSize copies of the given byte (0x01 here) at
// the end of the packet. We can test this to check which encrypter was used.
connection_.SetEncrypter(ENCRYPTION_NONE,
QuicMakeUnique<TaggingEncrypter>(0x01));
// Attempt to send a handshake message and have the socket block.
EXPECT_CALL(*send_algorithm_, CanSend(_)).WillRepeatedly(Return(true));
BlockOnNextWrite();
connection_.SendStreamDataWithString(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), "foo", 0,
NO_FIN);
// The packet should be serialized, but not queued.
EXPECT_EQ(1u, connection_.NumQueuedPackets());
// Switch to the new encrypter.
connection_.SetEncrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<TaggingEncrypter>(0x02));
connection_.SetDefaultEncryptionLevel(ENCRYPTION_INITIAL);
// Now become writeable and flush the packets.
writer_->SetWritable();
EXPECT_CALL(visitor_, OnCanWrite());
connection_.OnCanWrite();
EXPECT_EQ(0u, connection_.NumQueuedPackets());
// Verify that the handshake packet went out at the null encryption.
EXPECT_EQ(0x01010101u, writer_->final_bytes_of_last_packet());
}
TEST_P(QuicConnectionTest,
DropRetransmitsForNullEncryptedPacketAfterForwardSecure) {
use_tagging_decrypter();
connection_.SetEncrypter(ENCRYPTION_NONE,
QuicMakeUnique<TaggingEncrypter>(0x01));
QuicPacketNumber packet_number;
SendStreamDataToPeer(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), "foo", 0,
NO_FIN, &packet_number);
// Simulate the retransmission alarm firing and the socket blocking.
BlockOnNextWrite();
clock_.AdvanceTime(DefaultRetransmissionTime());
connection_.GetRetransmissionAlarm()->Fire();
// Go forward secure.
connection_.SetEncrypter(ENCRYPTION_FORWARD_SECURE,
QuicMakeUnique<TaggingEncrypter>(0x02));
connection_.SetDefaultEncryptionLevel(ENCRYPTION_FORWARD_SECURE);
notifier_.NeuterUnencryptedData();
connection_.NeuterUnencryptedPackets();
EXPECT_EQ(QuicTime::Zero(), connection_.GetRetransmissionAlarm()->deadline());
// Unblock the socket and ensure that no packets are sent.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(0);
writer_->SetWritable();
connection_.OnCanWrite();
}
TEST_P(QuicConnectionTest, RetransmitPacketsWithInitialEncryption) {
use_tagging_decrypter();
connection_.SetEncrypter(ENCRYPTION_NONE,
QuicMakeUnique<TaggingEncrypter>(0x01));
connection_.SetDefaultEncryptionLevel(ENCRYPTION_NONE);
SendStreamDataToPeer(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), "foo", 0,
NO_FIN, nullptr);
connection_.SetEncrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<TaggingEncrypter>(0x02));
connection_.SetDefaultEncryptionLevel(ENCRYPTION_INITIAL);
SendStreamDataToPeer(2, "bar", 0, NO_FIN, nullptr);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
connection_.RetransmitUnackedPackets(ALL_INITIAL_RETRANSMISSION);
}
TEST_P(QuicConnectionTest, BufferNonDecryptablePackets) {
// SetFromConfig is always called after construction from InitializeSession.
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
QuicConfig config;
connection_.SetFromConfig(config);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
use_tagging_decrypter();
const uint8_t tag = 0x07;
peer_framer_.SetEncrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<TaggingEncrypter>(tag));
// Process an encrypted packet which can not yet be decrypted which should
// result in the packet being buffered.
ProcessDataPacketAtLevel(1, !kHasStopWaiting, ENCRYPTION_INITIAL);
// Transition to the new encryption state and process another encrypted packet
// which should result in the original packet being processed.
connection_.SetDecrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<StrictTaggingDecrypter>(tag));
connection_.SetDefaultEncryptionLevel(ENCRYPTION_INITIAL);
connection_.SetEncrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<TaggingEncrypter>(tag));
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(2);
ProcessDataPacketAtLevel(2, !kHasStopWaiting, ENCRYPTION_INITIAL);
// Finally, process a third packet and note that we do not reprocess the
// buffered packet.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(3, !kHasStopWaiting, ENCRYPTION_INITIAL);
}
TEST_P(QuicConnectionTest, TestRetransmitOrder) {
connection_.SetMaxTailLossProbes(0);
QuicByteCount first_packet_size;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.WillOnce(SaveArg<3>(&first_packet_size));
connection_.SendStreamDataWithString(3, "first_packet", 0, NO_FIN);
QuicByteCount second_packet_size;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.WillOnce(SaveArg<3>(&second_packet_size));
connection_.SendStreamDataWithString(3, "second_packet", 12, NO_FIN);
EXPECT_NE(first_packet_size, second_packet_size);
// Advance the clock by huge time to make sure packets will be retransmitted.
clock_.AdvanceTime(QuicTime::Delta::FromSeconds(10));
{
InSequence s;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, first_packet_size, _));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, second_packet_size, _));
}
connection_.GetRetransmissionAlarm()->Fire();
// Advance again and expect the packets to be sent again in the same order.
clock_.AdvanceTime(QuicTime::Delta::FromSeconds(20));
{
InSequence s;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, first_packet_size, _));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, second_packet_size, _));
}
connection_.GetRetransmissionAlarm()->Fire();
}
TEST_P(QuicConnectionTest, Buffer100NonDecryptablePacketsThenKeyChange) {
// SetFromConfig is always called after construction from InitializeSession.
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
QuicConfig config;
config.set_max_undecryptable_packets(100);
connection_.SetFromConfig(config);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
use_tagging_decrypter();
const uint8_t tag = 0x07;
peer_framer_.SetEncrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<TaggingEncrypter>(tag));
// Process an encrypted packet which can not yet be decrypted which should
// result in the packet being buffered.
for (uint64_t i = 1; i <= 100; ++i) {
ProcessDataPacketAtLevel(i, !kHasStopWaiting, ENCRYPTION_INITIAL);
}
// Transition to the new encryption state and process another encrypted packet
// which should result in the original packets being processed.
EXPECT_FALSE(connection_.GetProcessUndecryptablePacketsAlarm()->IsSet());
connection_.SetDecrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<StrictTaggingDecrypter>(tag));
EXPECT_TRUE(connection_.GetProcessUndecryptablePacketsAlarm()->IsSet());
connection_.SetDefaultEncryptionLevel(ENCRYPTION_INITIAL);
connection_.SetEncrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<TaggingEncrypter>(tag));
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(100);
connection_.GetProcessUndecryptablePacketsAlarm()->Fire();
// Finally, process a third packet and note that we do not reprocess the
// buffered packet.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(102, !kHasStopWaiting, ENCRYPTION_INITIAL);
}
TEST_P(QuicConnectionTest, SetRTOAfterWritingToSocket) {
BlockOnNextWrite();
connection_.SendStreamDataWithString(1, "foo", 0, NO_FIN);
// Make sure that RTO is not started when the packet is queued.
EXPECT_FALSE(connection_.GetRetransmissionAlarm()->IsSet());
// Test that RTO is started once we write to the socket.
writer_->SetWritable();
connection_.OnCanWrite();
EXPECT_TRUE(connection_.GetRetransmissionAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, DelayRTOWithAckReceipt) {
connection_.SetMaxTailLossProbes(0);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(2);
connection_.SendStreamDataWithString(2, "foo", 0, NO_FIN);
connection_.SendStreamDataWithString(3, "bar", 0, NO_FIN);
QuicAlarm* retransmission_alarm = connection_.GetRetransmissionAlarm();
EXPECT_TRUE(retransmission_alarm->IsSet());
EXPECT_EQ(clock_.Now() + DefaultRetransmissionTime(),
retransmission_alarm->deadline());
// Advance the time right before the RTO, then receive an ack for the first
// packet to delay the RTO.
clock_.AdvanceTime(DefaultRetransmissionTime());
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
QuicAckFrame ack = InitAckFrame(1);
ProcessAckPacket(&ack);
// Now we have an RTT sample of DefaultRetransmissionTime(500ms),
// so the RTO has increased to 2 * SRTT.
EXPECT_TRUE(retransmission_alarm->IsSet());
EXPECT_EQ(retransmission_alarm->deadline(),
clock_.Now() + 2 * DefaultRetransmissionTime());
// Move forward past the original RTO and ensure the RTO is still pending.
clock_.AdvanceTime(2 * DefaultRetransmissionTime());
// Ensure the second packet gets retransmitted when it finally fires.
EXPECT_TRUE(retransmission_alarm->IsSet());
EXPECT_EQ(retransmission_alarm->deadline(), clock_.ApproximateNow());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
// Manually cancel the alarm to simulate a real test.
connection_.GetRetransmissionAlarm()->Fire();
// The new retransmitted packet number should set the RTO to a larger value
// than previously.
EXPECT_TRUE(retransmission_alarm->IsSet());
QuicTime next_rto_time = retransmission_alarm->deadline();
QuicTime expected_rto_time =
connection_.sent_packet_manager().GetRetransmissionTime();
EXPECT_EQ(next_rto_time, expected_rto_time);
}
TEST_P(QuicConnectionTest, TestQueued) {
connection_.SetMaxTailLossProbes(0);
EXPECT_EQ(0u, connection_.NumQueuedPackets());
BlockOnNextWrite();
connection_.SendStreamDataWithString(1, "foo", 0, NO_FIN);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
// Unblock the writes and actually send.
writer_->SetWritable();
connection_.OnCanWrite();
EXPECT_EQ(0u, connection_.NumQueuedPackets());
}
TEST_P(QuicConnectionTest, InitialTimeout) {
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(AnyNumber());
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
// SetFromConfig sets the initial timeouts before negotiation.
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
QuicConfig config;
connection_.SetFromConfig(config);
// Subtract a second from the idle timeout on the client side.
QuicTime default_timeout =
clock_.ApproximateNow() +
QuicTime::Delta::FromSeconds(kInitialIdleTimeoutSecs - 1);
EXPECT_EQ(default_timeout, connection_.GetTimeoutAlarm()->deadline());
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_NETWORK_IDLE_TIMEOUT, _,
ConnectionCloseSource::FROM_SELF));
// Simulate the timeout alarm firing.
clock_.AdvanceTime(QuicTime::Delta::FromSeconds(kInitialIdleTimeoutSecs - 1));
connection_.GetTimeoutAlarm()->Fire();
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_FALSE(connection_.connected());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
EXPECT_FALSE(connection_.GetPingAlarm()->IsSet());
EXPECT_FALSE(connection_.GetRetransmissionAlarm()->IsSet());
EXPECT_FALSE(connection_.GetSendAlarm()->IsSet());
EXPECT_FALSE(connection_.GetMtuDiscoveryAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, IdleTimeoutAfterFirstSentPacket) {
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(AnyNumber());
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
QuicConfig config;
connection_.SetFromConfig(config);
EXPECT_TRUE(connection_.GetTimeoutAlarm()->IsSet());
QuicTime initial_ddl =
clock_.ApproximateNow() +
QuicTime::Delta::FromSeconds(kInitialIdleTimeoutSecs - 1);
EXPECT_EQ(initial_ddl, connection_.GetTimeoutAlarm()->deadline());
EXPECT_TRUE(connection_.connected());
// Advance the time and send the first packet to the peer.
clock_.AdvanceTime(QuicTime::Delta::FromMicroseconds(20));
QuicPacketNumber last_packet;
SendStreamDataToPeer(1, "foo", 0, NO_FIN, &last_packet);
EXPECT_EQ(QuicPacketNumber(1u), last_packet);
// This will be the updated deadline for the connection to idle time out.
QuicTime new_ddl = clock_.ApproximateNow() +
QuicTime::Delta::FromSeconds(kInitialIdleTimeoutSecs - 1);
// Simulate the timeout alarm firing, the connection should not be closed as
// a new packet has been sent.
EXPECT_CALL(visitor_, OnConnectionClosed(_, _, _)).Times(0);
QuicTime::Delta delay = initial_ddl - clock_.ApproximateNow();
clock_.AdvanceTime(delay);
connection_.GetTimeoutAlarm()->Fire();
// Verify the timeout alarm deadline is updated.
EXPECT_TRUE(connection_.connected());
EXPECT_TRUE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_EQ(new_ddl, connection_.GetTimeoutAlarm()->deadline());
// Simulate the timeout alarm firing again, the connection now should be
// closed.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_NETWORK_IDLE_TIMEOUT, _,
ConnectionCloseSource::FROM_SELF));
clock_.AdvanceTime(new_ddl - clock_.ApproximateNow());
connection_.GetTimeoutAlarm()->Fire();
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_FALSE(connection_.connected());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
EXPECT_FALSE(connection_.GetPingAlarm()->IsSet());
EXPECT_FALSE(connection_.GetRetransmissionAlarm()->IsSet());
EXPECT_FALSE(connection_.GetSendAlarm()->IsSet());
EXPECT_FALSE(connection_.GetMtuDiscoveryAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, IdleTimeoutAfterSendTwoPackets) {
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(AnyNumber());
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
QuicConfig config;
connection_.SetFromConfig(config);
EXPECT_TRUE(connection_.GetTimeoutAlarm()->IsSet());
QuicTime initial_ddl =
clock_.ApproximateNow() +
QuicTime::Delta::FromSeconds(kInitialIdleTimeoutSecs - 1);
EXPECT_EQ(initial_ddl, connection_.GetTimeoutAlarm()->deadline());
EXPECT_TRUE(connection_.connected());
// Immediately send the first packet, this is a rare case but test code will
// hit this issue often as MockClock used for tests doesn't move with code
// execution until manually adjusted.
QuicPacketNumber last_packet;
SendStreamDataToPeer(1, "foo", 0, NO_FIN, &last_packet);
EXPECT_EQ(QuicPacketNumber(1u), last_packet);
// Advance the time and send the second packet to the peer.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(20));
SendStreamDataToPeer(1, "foo", 0, NO_FIN, &last_packet);
EXPECT_EQ(QuicPacketNumber(2u), last_packet);
if (GetQuicReloadableFlag(
quic_fix_time_of_first_packet_sent_after_receiving)) {
// Simulate the timeout alarm firing, the connection will be closed.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_NETWORK_IDLE_TIMEOUT, _,
ConnectionCloseSource::FROM_SELF));
clock_.AdvanceTime(initial_ddl - clock_.ApproximateNow());
connection_.GetTimeoutAlarm()->Fire();
} else {
// Simulate the timeout alarm firing, the connection will not be closed.
EXPECT_CALL(visitor_, OnConnectionClosed(_, _, _)).Times(0);
clock_.AdvanceTime(initial_ddl - clock_.ApproximateNow());
connection_.GetTimeoutAlarm()->Fire();
EXPECT_TRUE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_TRUE(connection_.connected());
// Advance another 20ms, and fire the alarm again. The connection will be
// closed.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_NETWORK_IDLE_TIMEOUT, _,
ConnectionCloseSource::FROM_SELF));
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(20));
connection_.GetTimeoutAlarm()->Fire();
}
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_FALSE(connection_.connected());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
EXPECT_FALSE(connection_.GetPingAlarm()->IsSet());
EXPECT_FALSE(connection_.GetRetransmissionAlarm()->IsSet());
EXPECT_FALSE(connection_.GetSendAlarm()->IsSet());
EXPECT_FALSE(connection_.GetMtuDiscoveryAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, HandshakeTimeout) {
// Use a shorter handshake timeout than idle timeout for this test.
const QuicTime::Delta timeout = QuicTime::Delta::FromSeconds(5);
connection_.SetNetworkTimeouts(timeout, timeout);
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(AnyNumber());
QuicTime handshake_timeout =
clock_.ApproximateNow() + timeout - QuicTime::Delta::FromSeconds(1);
EXPECT_EQ(handshake_timeout, connection_.GetTimeoutAlarm()->deadline());
EXPECT_TRUE(connection_.connected());
// Send and ack new data 3 seconds later to lengthen the idle timeout.
SendStreamDataToPeer(
QuicUtils::GetHeadersStreamId(connection_.transport_version()), "GET /",
0, FIN, nullptr);
clock_.AdvanceTime(QuicTime::Delta::FromSeconds(3));
QuicAckFrame frame = InitAckFrame(1);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
ProcessAckPacket(&frame);
// Fire early to verify it wouldn't timeout yet.
connection_.GetTimeoutAlarm()->Fire();
EXPECT_TRUE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_TRUE(connection_.connected());
clock_.AdvanceTime(timeout - QuicTime::Delta::FromSeconds(2));
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_HANDSHAKE_TIMEOUT, _,
ConnectionCloseSource::FROM_SELF));
// Simulate the timeout alarm firing.
connection_.GetTimeoutAlarm()->Fire();
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_FALSE(connection_.connected());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
EXPECT_FALSE(connection_.GetPingAlarm()->IsSet());
EXPECT_FALSE(connection_.GetRetransmissionAlarm()->IsSet());
EXPECT_FALSE(connection_.GetSendAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, PingAfterSend) {
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(visitor_, HasOpenDynamicStreams()).WillRepeatedly(Return(true));
EXPECT_FALSE(connection_.GetPingAlarm()->IsSet());
// Advance to 5ms, and send a packet to the peer, which will set
// the ping alarm.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_FALSE(connection_.GetRetransmissionAlarm()->IsSet());
SendStreamDataToPeer(
QuicUtils::GetHeadersStreamId(connection_.transport_version()), "GET /",
0, FIN, nullptr);
EXPECT_TRUE(connection_.GetPingAlarm()->IsSet());
EXPECT_EQ(clock_.ApproximateNow() + QuicTime::Delta::FromSeconds(15),
connection_.GetPingAlarm()->deadline());
// Now recevie an ACK of the previous packet, which will move the
// ping alarm forward.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
QuicAckFrame frame = InitAckFrame(1);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
ProcessAckPacket(&frame);
EXPECT_TRUE(connection_.GetPingAlarm()->IsSet());
// The ping timer is set slightly less than 15 seconds in the future, because
// of the 1s ping timer alarm granularity.
EXPECT_EQ(clock_.ApproximateNow() + QuicTime::Delta::FromSeconds(15) -
QuicTime::Delta::FromMilliseconds(5),
connection_.GetPingAlarm()->deadline());
writer_->Reset();
clock_.AdvanceTime(QuicTime::Delta::FromSeconds(15));
EXPECT_CALL(visitor_, SendPing()).WillOnce(Invoke([this]() {
connection_.SendControlFrame(QuicFrame(QuicPingFrame(1)));
}));
connection_.GetPingAlarm()->Fire();
EXPECT_EQ(1u, writer_->frame_count());
ASSERT_EQ(1u, writer_->ping_frames().size());
writer_->Reset();
EXPECT_CALL(visitor_, HasOpenDynamicStreams()).WillRepeatedly(Return(false));
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
SendAckPacketToPeer();
EXPECT_FALSE(connection_.GetPingAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, ReducedPingTimeout) {
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(visitor_, HasOpenDynamicStreams()).WillRepeatedly(Return(true));
EXPECT_FALSE(connection_.GetPingAlarm()->IsSet());
// Use a reduced ping timeout for this connection.
connection_.set_ping_timeout(QuicTime::Delta::FromSeconds(10));
// Advance to 5ms, and send a packet to the peer, which will set
// the ping alarm.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_FALSE(connection_.GetRetransmissionAlarm()->IsSet());
SendStreamDataToPeer(
QuicUtils::GetHeadersStreamId(connection_.transport_version()), "GET /",
0, FIN, nullptr);
EXPECT_TRUE(connection_.GetPingAlarm()->IsSet());
EXPECT_EQ(clock_.ApproximateNow() + QuicTime::Delta::FromSeconds(10),
connection_.GetPingAlarm()->deadline());
// Now recevie an ACK of the previous packet, which will move the
// ping alarm forward.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
QuicAckFrame frame = InitAckFrame(1);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
ProcessAckPacket(&frame);
EXPECT_TRUE(connection_.GetPingAlarm()->IsSet());
// The ping timer is set slightly less than 10 seconds in the future, because
// of the 1s ping timer alarm granularity.
EXPECT_EQ(clock_.ApproximateNow() + QuicTime::Delta::FromSeconds(10) -
QuicTime::Delta::FromMilliseconds(5),
connection_.GetPingAlarm()->deadline());
writer_->Reset();
clock_.AdvanceTime(QuicTime::Delta::FromSeconds(10));
EXPECT_CALL(visitor_, SendPing()).WillOnce(Invoke([this]() {
connection_.SendControlFrame(QuicFrame(QuicPingFrame(1)));
}));
connection_.GetPingAlarm()->Fire();
EXPECT_EQ(1u, writer_->frame_count());
ASSERT_EQ(1u, writer_->ping_frames().size());
writer_->Reset();
EXPECT_CALL(visitor_, HasOpenDynamicStreams()).WillRepeatedly(Return(false));
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
SendAckPacketToPeer();
EXPECT_FALSE(connection_.GetPingAlarm()->IsSet());
}
// Tests whether sending an MTU discovery packet to peer successfully causes the
// maximum packet size to increase.
TEST_P(QuicConnectionTest, SendMtuDiscoveryPacket) {
EXPECT_TRUE(connection_.connected());
// Send an MTU probe.
const size_t new_mtu = kDefaultMaxPacketSize + 100;
QuicByteCount mtu_probe_size;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.WillOnce(SaveArg<3>(&mtu_probe_size));
connection_.SendMtuDiscoveryPacket(new_mtu);
EXPECT_EQ(new_mtu, mtu_probe_size);
EXPECT_EQ(QuicPacketNumber(1u), creator_->packet_number());
// Send more than MTU worth of data. No acknowledgement was received so far,
// so the MTU should be at its old value.
const QuicString data(kDefaultMaxPacketSize + 1, '.');
QuicByteCount size_before_mtu_change;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.Times(2)
.WillOnce(SaveArg<3>(&size_before_mtu_change))
.WillOnce(Return());
connection_.SendStreamDataWithString(3, data, 0, FIN);
EXPECT_EQ(QuicPacketNumber(3u), creator_->packet_number());
EXPECT_EQ(kDefaultMaxPacketSize, size_before_mtu_change);
// Acknowledge all packets so far.
QuicAckFrame probe_ack = InitAckFrame(3);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
ProcessAckPacket(&probe_ack);
EXPECT_EQ(new_mtu, connection_.max_packet_length());
// Send the same data again. Check that it fits into a single packet now.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
connection_.SendStreamDataWithString(3, data, 0, FIN);
EXPECT_EQ(QuicPacketNumber(4u), creator_->packet_number());
}
// Tests whether MTU discovery does not happen when it is not explicitly enabled
// by the connection options.
TEST_P(QuicConnectionTest, MtuDiscoveryDisabled) {
EXPECT_TRUE(connection_.connected());
const QuicPacketCount packets_between_probes_base = 10;
set_packets_between_probes_base(packets_between_probes_base);
const QuicPacketCount number_of_packets = packets_between_probes_base * 2;
for (QuicPacketCount i = 0; i < number_of_packets; i++) {
SendStreamDataToPeer(3, ".", i, NO_FIN, nullptr);
EXPECT_FALSE(connection_.GetMtuDiscoveryAlarm()->IsSet());
EXPECT_EQ(0u, connection_.mtu_probe_count());
}
}
// Tests whether MTU discovery works when the probe gets acknowledged on the
// first try.
TEST_P(QuicConnectionTest, MtuDiscoveryEnabled) {
EXPECT_TRUE(connection_.connected());
connection_.EnablePathMtuDiscovery(send_algorithm_);
const QuicPacketCount packets_between_probes_base = 5;
set_packets_between_probes_base(packets_between_probes_base);
// Send enough packets so that the next one triggers path MTU discovery.
for (QuicPacketCount i = 0; i < packets_between_probes_base - 1; i++) {
SendStreamDataToPeer(3, ".", i, NO_FIN, nullptr);
ASSERT_FALSE(connection_.GetMtuDiscoveryAlarm()->IsSet());
}
// Trigger the probe.
SendStreamDataToPeer(3, "!", packets_between_probes_base - 1, NO_FIN,
nullptr);
ASSERT_TRUE(connection_.GetMtuDiscoveryAlarm()->IsSet());
QuicByteCount probe_size;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.WillOnce(SaveArg<3>(&probe_size));
connection_.GetMtuDiscoveryAlarm()->Fire();
EXPECT_EQ(kMtuDiscoveryTargetPacketSizeHigh, probe_size);
const QuicPacketNumber probe_packet_number =
FirstSendingPacketNumber() + packets_between_probes_base;
ASSERT_EQ(probe_packet_number, creator_->packet_number());
// Acknowledge all packets sent so far.
QuicAckFrame probe_ack = InitAckFrame(probe_packet_number);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
ProcessAckPacket(&probe_ack);
EXPECT_EQ(kMtuDiscoveryTargetPacketSizeHigh, connection_.max_packet_length());
EXPECT_EQ(0u, connection_.GetBytesInFlight());
// Send more packets, and ensure that none of them sets the alarm.
for (QuicPacketCount i = 0; i < 4 * packets_between_probes_base; i++) {
SendStreamDataToPeer(3, ".", packets_between_probes_base + i, NO_FIN,
nullptr);
ASSERT_FALSE(connection_.GetMtuDiscoveryAlarm()->IsSet());
}
EXPECT_EQ(1u, connection_.mtu_probe_count());
}
// Tests whether MTU discovery works correctly when the probes never get
// acknowledged.
TEST_P(QuicConnectionTest, MtuDiscoveryFailed) {
EXPECT_TRUE(connection_.connected());
connection_.EnablePathMtuDiscovery(send_algorithm_);
const QuicTime::Delta rtt = QuicTime::Delta::FromMilliseconds(100);
EXPECT_EQ(kPacketsBetweenMtuProbesBase,
QuicConnectionPeer::GetPacketsBetweenMtuProbes(&connection_));
// Lower the number of probes between packets in order to make the test go
// much faster.
const QuicPacketCount packets_between_probes_base = 5;
set_packets_between_probes_base(packets_between_probes_base);
// This tests sends more packets than strictly necessary to make sure that if
// the connection was to send more discovery packets than needed, those would
// get caught as well.
const QuicPacketCount number_of_packets =
packets_between_probes_base * (1 << (kMtuDiscoveryAttempts + 1));
std::vector<QuicPacketNumber> mtu_discovery_packets;
// Called by the first ack.
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Called on many acks.
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _))
.Times(AnyNumber());
for (QuicPacketCount i = 0; i < number_of_packets; i++) {
SendStreamDataToPeer(3, "!", i, NO_FIN, nullptr);
clock_.AdvanceTime(rtt);
// Receive an ACK, which marks all data packets as received, and all MTU
// discovery packets as missing.
QuicAckFrame ack;
if (!mtu_discovery_packets.empty()) {
QuicPacketNumber min_packet = *min_element(mtu_discovery_packets.begin(),
mtu_discovery_packets.end());
QuicPacketNumber max_packet = *max_element(mtu_discovery_packets.begin(),
mtu_discovery_packets.end());
ack.packets.AddRange(QuicPacketNumber(1), min_packet);
ack.packets.AddRange(QuicPacketNumber(max_packet + 1),
creator_->packet_number() + 1);
ack.largest_acked = creator_->packet_number();
} else {
ack.packets.AddRange(QuicPacketNumber(1), creator_->packet_number() + 1);
ack.largest_acked = creator_->packet_number();
}
ProcessAckPacket(&ack);
// Trigger MTU probe if it would be scheduled now.
if (!connection_.GetMtuDiscoveryAlarm()->IsSet()) {
continue;
}
// Fire the alarm. The alarm should cause a packet to be sent.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
connection_.GetMtuDiscoveryAlarm()->Fire();
// Record the packet number of the MTU discovery packet in order to
// mark it as NACK'd.
mtu_discovery_packets.push_back(creator_->packet_number());
}
// Ensure the number of packets between probes grows exponentially by checking
// it against the closed-form expression for the packet number.
ASSERT_EQ(kMtuDiscoveryAttempts, mtu_discovery_packets.size());
for (uint64_t i = 0; i < kMtuDiscoveryAttempts; i++) {
// 2^0 + 2^1 + 2^2 + ... + 2^n = 2^(n + 1) - 1
const QuicPacketCount packets_between_probes =
packets_between_probes_base * ((1 << (i + 1)) - 1);
EXPECT_EQ(QuicPacketNumber(packets_between_probes + (i + 1)),
mtu_discovery_packets[i]);
}
EXPECT_FALSE(connection_.GetMtuDiscoveryAlarm()->IsSet());
EXPECT_EQ(kDefaultMaxPacketSize, connection_.max_packet_length());
EXPECT_EQ(kMtuDiscoveryAttempts, connection_.mtu_probe_count());
}
// Tests whether MTU discovery works when the writer has a limit on how large a
// packet can be.
TEST_P(QuicConnectionTest, MtuDiscoveryWriterLimited) {
EXPECT_TRUE(connection_.connected());
const QuicByteCount mtu_limit = kMtuDiscoveryTargetPacketSizeHigh - 1;
writer_->set_max_packet_size(mtu_limit);
connection_.EnablePathMtuDiscovery(send_algorithm_);
const QuicPacketCount packets_between_probes_base = 5;
set_packets_between_probes_base(packets_between_probes_base);
// Send enough packets so that the next one triggers path MTU discovery.
for (QuicPacketCount i = 0; i < packets_between_probes_base - 1; i++) {
SendStreamDataToPeer(3, ".", i, NO_FIN, nullptr);
ASSERT_FALSE(connection_.GetMtuDiscoveryAlarm()->IsSet());
}
// Trigger the probe.
SendStreamDataToPeer(3, "!", packets_between_probes_base - 1, NO_FIN,
nullptr);
ASSERT_TRUE(connection_.GetMtuDiscoveryAlarm()->IsSet());
QuicByteCount probe_size;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.WillOnce(SaveArg<3>(&probe_size));
connection_.GetMtuDiscoveryAlarm()->Fire();
EXPECT_EQ(mtu_limit, probe_size);
const QuicPacketNumber probe_sequence_number =
FirstSendingPacketNumber() + packets_between_probes_base;
ASSERT_EQ(probe_sequence_number, creator_->packet_number());
// Acknowledge all packets sent so far.
QuicAckFrame probe_ack = InitAckFrame(probe_sequence_number);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
ProcessAckPacket(&probe_ack);
EXPECT_EQ(mtu_limit, connection_.max_packet_length());
EXPECT_EQ(0u, connection_.GetBytesInFlight());
// Send more packets, and ensure that none of them sets the alarm.
for (QuicPacketCount i = 0; i < 4 * packets_between_probes_base; i++) {
SendStreamDataToPeer(3, ".", packets_between_probes_base + i, NO_FIN,
nullptr);
ASSERT_FALSE(connection_.GetMtuDiscoveryAlarm()->IsSet());
}
EXPECT_EQ(1u, connection_.mtu_probe_count());
}
// Tests whether MTU discovery works when the writer returns an error despite
// advertising higher packet length.
TEST_P(QuicConnectionTest, MtuDiscoveryWriterFailed) {
EXPECT_TRUE(connection_.connected());
const QuicByteCount mtu_limit = kMtuDiscoveryTargetPacketSizeHigh - 1;
const QuicByteCount initial_mtu = connection_.max_packet_length();
EXPECT_LT(initial_mtu, mtu_limit);
writer_->set_max_packet_size(mtu_limit);
connection_.EnablePathMtuDiscovery(send_algorithm_);
const QuicPacketCount packets_between_probes_base = 5;
set_packets_between_probes_base(packets_between_probes_base);
// Send enough packets so that the next one triggers path MTU discovery.
for (QuicPacketCount i = 0; i < packets_between_probes_base - 1; i++) {
SendStreamDataToPeer(3, ".", i, NO_FIN, nullptr);
ASSERT_FALSE(connection_.GetMtuDiscoveryAlarm()->IsSet());
}
// Trigger the probe.
SendStreamDataToPeer(3, "!", packets_between_probes_base - 1, NO_FIN,
nullptr);
ASSERT_TRUE(connection_.GetMtuDiscoveryAlarm()->IsSet());
writer_->SimulateNextPacketTooLarge();
connection_.GetMtuDiscoveryAlarm()->Fire();
ASSERT_TRUE(connection_.connected());
// Send more data.
QuicPacketNumber probe_number = creator_->packet_number();
QuicPacketCount extra_packets = packets_between_probes_base * 3;
for (QuicPacketCount i = 0; i < extra_packets; i++) {
connection_.EnsureWritableAndSendStreamData5();
ASSERT_FALSE(connection_.GetMtuDiscoveryAlarm()->IsSet());
}
// Acknowledge all packets sent so far, except for the lost probe.
QuicAckFrame probe_ack =
ConstructAckFrame(creator_->packet_number(), probe_number);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
ProcessAckPacket(&probe_ack);
EXPECT_EQ(initial_mtu, connection_.max_packet_length());
// Send more packets, and ensure that none of them sets the alarm.
for (QuicPacketCount i = 0; i < 4 * packets_between_probes_base; i++) {
connection_.EnsureWritableAndSendStreamData5();
ASSERT_FALSE(connection_.GetMtuDiscoveryAlarm()->IsSet());
}
EXPECT_EQ(initial_mtu, connection_.max_packet_length());
EXPECT_EQ(1u, connection_.mtu_probe_count());
}
TEST_P(QuicConnectionTest, NoMtuDiscoveryAfterConnectionClosed) {
EXPECT_TRUE(connection_.connected());
connection_.EnablePathMtuDiscovery(send_algorithm_);
const QuicPacketCount packets_between_probes_base = 10;
set_packets_between_probes_base(packets_between_probes_base);
// Send enough packets so that the next one triggers path MTU discovery.
for (QuicPacketCount i = 0; i < packets_between_probes_base - 1; i++) {
SendStreamDataToPeer(3, ".", i, NO_FIN, nullptr);
ASSERT_FALSE(connection_.GetMtuDiscoveryAlarm()->IsSet());
}
SendStreamDataToPeer(3, "!", packets_between_probes_base - 1, NO_FIN,
nullptr);
EXPECT_TRUE(connection_.GetMtuDiscoveryAlarm()->IsSet());
EXPECT_CALL(visitor_, OnConnectionClosed(_, _, _));
connection_.CloseConnection(QUIC_PEER_GOING_AWAY, "no reason",
ConnectionCloseBehavior::SILENT_CLOSE);
EXPECT_FALSE(connection_.GetMtuDiscoveryAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, TimeoutAfterSend) {
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
QuicConfig config;
connection_.SetFromConfig(config);
EXPECT_FALSE(QuicConnectionPeer::IsSilentCloseEnabled(&connection_));
const QuicTime::Delta initial_idle_timeout =
QuicTime::Delta::FromSeconds(kInitialIdleTimeoutSecs - 1);
const QuicTime::Delta five_ms = QuicTime::Delta::FromMilliseconds(5);
QuicTime default_timeout = clock_.ApproximateNow() + initial_idle_timeout;
// When we send a packet, the timeout will change to 5ms +
// kInitialIdleTimeoutSecs.
clock_.AdvanceTime(five_ms);
SendStreamDataToPeer(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "foo",
0, FIN, nullptr);
EXPECT_EQ(default_timeout, connection_.GetTimeoutAlarm()->deadline());
// Now send more data. This will not move the timeout because
// no data has been received since the previous write.
clock_.AdvanceTime(five_ms);
SendStreamDataToPeer(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "foo",
3, FIN, nullptr);
EXPECT_EQ(default_timeout, connection_.GetTimeoutAlarm()->deadline());
// The original alarm will fire. We should not time out because we had a
// network event at t=5ms. The alarm will reregister.
clock_.AdvanceTime(initial_idle_timeout - five_ms - five_ms);
EXPECT_EQ(default_timeout, clock_.ApproximateNow());
connection_.GetTimeoutAlarm()->Fire();
EXPECT_TRUE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_TRUE(connection_.connected());
EXPECT_EQ(default_timeout + five_ms,
connection_.GetTimeoutAlarm()->deadline());
// This time, we should time out.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_NETWORK_IDLE_TIMEOUT, _,
ConnectionCloseSource::FROM_SELF));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
clock_.AdvanceTime(five_ms);
EXPECT_EQ(default_timeout + five_ms, clock_.ApproximateNow());
connection_.GetTimeoutAlarm()->Fire();
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_FALSE(connection_.connected());
}
TEST_P(QuicConnectionTest, TimeoutAfterRetransmission) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
QuicConfig config;
connection_.SetFromConfig(config);
EXPECT_FALSE(QuicConnectionPeer::IsSilentCloseEnabled(&connection_));
const QuicTime start_time = clock_.Now();
const QuicTime::Delta initial_idle_timeout =
QuicTime::Delta::FromSeconds(kInitialIdleTimeoutSecs - 1);
QuicTime default_timeout = clock_.Now() + initial_idle_timeout;
connection_.SetMaxTailLossProbes(0);
const QuicTime default_retransmission_time =
start_time + DefaultRetransmissionTime();
ASSERT_LT(default_retransmission_time, default_timeout);
// When we send a packet, the timeout will change to 5 ms +
// kInitialIdleTimeoutSecs (but it will not reschedule the alarm).
const QuicTime::Delta five_ms = QuicTime::Delta::FromMilliseconds(5);
const QuicTime send_time = start_time + five_ms;
clock_.AdvanceTime(five_ms);
ASSERT_EQ(send_time, clock_.Now());
SendStreamDataToPeer(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "foo",
0, FIN, nullptr);
EXPECT_EQ(default_timeout, connection_.GetTimeoutAlarm()->deadline());
// Move forward 5 ms and receive a packet, which will move the timeout
// forward 5 ms more (but will not reschedule the alarm).
const QuicTime receive_time = send_time + five_ms;
clock_.AdvanceTime(receive_time - clock_.Now());
ASSERT_EQ(receive_time, clock_.Now());
ProcessPacket(1);
// Now move forward to the retransmission time and retransmit the
// packet, which should move the timeout forward again (but will not
// reschedule the alarm).
EXPECT_EQ(default_retransmission_time + five_ms,
connection_.GetRetransmissionAlarm()->deadline());
// Simulate the retransmission alarm firing.
const QuicTime rto_time = send_time + DefaultRetransmissionTime();
const QuicTime final_timeout = rto_time + initial_idle_timeout;
clock_.AdvanceTime(rto_time - clock_.Now());
ASSERT_EQ(rto_time, clock_.Now());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, QuicPacketNumber(2u), _, _));
connection_.GetRetransmissionAlarm()->Fire();
// Advance to the original timeout and fire the alarm. The connection should
// timeout, and the alarm should be registered based on the time of the
// retransmission.
clock_.AdvanceTime(default_timeout - clock_.Now());
ASSERT_EQ(default_timeout.ToDebuggingValue(),
clock_.Now().ToDebuggingValue());
EXPECT_EQ(default_timeout, clock_.Now());
connection_.GetTimeoutAlarm()->Fire();
EXPECT_TRUE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_TRUE(connection_.connected());
ASSERT_EQ(final_timeout.ToDebuggingValue(),
connection_.GetTimeoutAlarm()->deadline().ToDebuggingValue());
// This time, we should time out.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_NETWORK_IDLE_TIMEOUT, _,
ConnectionCloseSource::FROM_SELF));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
clock_.AdvanceTime(final_timeout - clock_.Now());
EXPECT_EQ(connection_.GetTimeoutAlarm()->deadline(), clock_.Now());
EXPECT_EQ(final_timeout, clock_.Now());
connection_.GetTimeoutAlarm()->Fire();
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_FALSE(connection_.connected());
}
TEST_P(QuicConnectionTest, NewTimeoutAfterSendSilentClose) {
// Same test as above, but complete a handshake which enables silent close,
// causing no connection close packet to be sent.
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
QuicConfig config;
// Create a handshake message that also enables silent close.
CryptoHandshakeMessage msg;
QuicString error_details;
QuicConfig client_config;
client_config.SetInitialStreamFlowControlWindowToSend(
kInitialStreamFlowControlWindowForTest);
client_config.SetInitialSessionFlowControlWindowToSend(
kInitialSessionFlowControlWindowForTest);
client_config.SetIdleNetworkTimeout(
QuicTime::Delta::FromSeconds(kDefaultIdleTimeoutSecs),
QuicTime::Delta::FromSeconds(kDefaultIdleTimeoutSecs));
client_config.ToHandshakeMessage(&msg);
const QuicErrorCode error =
config.ProcessPeerHello(msg, CLIENT, &error_details);
EXPECT_EQ(QUIC_NO_ERROR, error);
connection_.SetFromConfig(config);
EXPECT_TRUE(QuicConnectionPeer::IsSilentCloseEnabled(&connection_));
const QuicTime::Delta default_idle_timeout =
QuicTime::Delta::FromSeconds(kDefaultIdleTimeoutSecs - 1);
const QuicTime::Delta five_ms = QuicTime::Delta::FromMilliseconds(5);
QuicTime default_timeout = clock_.ApproximateNow() + default_idle_timeout;
// When we send a packet, the timeout will change to 5ms +
// kInitialIdleTimeoutSecs.
clock_.AdvanceTime(five_ms);
SendStreamDataToPeer(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "foo",
0, FIN, nullptr);
EXPECT_EQ(default_timeout, connection_.GetTimeoutAlarm()->deadline());
// Now send more data. This will not move the timeout because
// no data has been received since the previous write.
clock_.AdvanceTime(five_ms);
SendStreamDataToPeer(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "foo",
3, FIN, nullptr);
EXPECT_EQ(default_timeout, connection_.GetTimeoutAlarm()->deadline());
// The original alarm will fire. We should not time out because we had a
// network event at t=5ms. The alarm will reregister.
clock_.AdvanceTime(default_idle_timeout - five_ms - five_ms);
EXPECT_EQ(default_timeout, clock_.ApproximateNow());
connection_.GetTimeoutAlarm()->Fire();
EXPECT_TRUE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_TRUE(connection_.connected());
EXPECT_EQ(default_timeout + five_ms,
connection_.GetTimeoutAlarm()->deadline());
// This time, we should time out.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_NETWORK_IDLE_TIMEOUT, _,
ConnectionCloseSource::FROM_SELF));
clock_.AdvanceTime(five_ms);
EXPECT_EQ(default_timeout + five_ms, clock_.ApproximateNow());
connection_.GetTimeoutAlarm()->Fire();
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_FALSE(connection_.connected());
}
TEST_P(QuicConnectionTest, TimeoutAfterSendSilentCloseAndTLP) {
// Same test as above, but complete a handshake which enables silent close,
// but sending TLPs causes the connection close to be sent.
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
QuicConfig config;
// Create a handshake message that also enables silent close.
CryptoHandshakeMessage msg;
QuicString error_details;
QuicConfig client_config;
client_config.SetInitialStreamFlowControlWindowToSend(
kInitialStreamFlowControlWindowForTest);
client_config.SetInitialSessionFlowControlWindowToSend(
kInitialSessionFlowControlWindowForTest);
client_config.SetIdleNetworkTimeout(
QuicTime::Delta::FromSeconds(kDefaultIdleTimeoutSecs),
QuicTime::Delta::FromSeconds(kDefaultIdleTimeoutSecs));
client_config.ToHandshakeMessage(&msg);
const QuicErrorCode error =
config.ProcessPeerHello(msg, CLIENT, &error_details);
EXPECT_EQ(QUIC_NO_ERROR, error);
connection_.SetFromConfig(config);
EXPECT_TRUE(QuicConnectionPeer::IsSilentCloseEnabled(&connection_));
const QuicTime::Delta default_idle_timeout =
QuicTime::Delta::FromSeconds(kDefaultIdleTimeoutSecs - 1);
const QuicTime::Delta five_ms = QuicTime::Delta::FromMilliseconds(5);
QuicTime default_timeout = clock_.ApproximateNow() + default_idle_timeout;
// When we send a packet, the timeout will change to 5ms +
// kInitialIdleTimeoutSecs.
clock_.AdvanceTime(five_ms);
SendStreamDataToPeer(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "foo",
0, FIN, nullptr);
EXPECT_EQ(default_timeout, connection_.GetTimeoutAlarm()->deadline());
// Retransmit the packet via tail loss probe.
clock_.AdvanceTime(connection_.GetRetransmissionAlarm()->deadline() -
clock_.Now());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, QuicPacketNumber(2u), _, _));
connection_.GetRetransmissionAlarm()->Fire();
// This time, we should time out and send a connection close due to the TLP.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_NETWORK_IDLE_TIMEOUT, _,
ConnectionCloseSource::FROM_SELF));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
clock_.AdvanceTime(connection_.GetTimeoutAlarm()->deadline() -
clock_.ApproximateNow() + five_ms);
connection_.GetTimeoutAlarm()->Fire();
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_FALSE(connection_.connected());
}
TEST_P(QuicConnectionTest, TimeoutAfterSendSilentCloseWithOpenStreams) {
// Same test as above, but complete a handshake which enables silent close,
// but having open streams causes the connection close to be sent.
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
QuicConfig config;
// Create a handshake message that also enables silent close.
CryptoHandshakeMessage msg;
QuicString error_details;
QuicConfig client_config;
client_config.SetInitialStreamFlowControlWindowToSend(
kInitialStreamFlowControlWindowForTest);
client_config.SetInitialSessionFlowControlWindowToSend(
kInitialSessionFlowControlWindowForTest);
client_config.SetIdleNetworkTimeout(
QuicTime::Delta::FromSeconds(kDefaultIdleTimeoutSecs),
QuicTime::Delta::FromSeconds(kDefaultIdleTimeoutSecs));
client_config.ToHandshakeMessage(&msg);
const QuicErrorCode error =
config.ProcessPeerHello(msg, CLIENT, &error_details);
EXPECT_EQ(QUIC_NO_ERROR, error);
connection_.SetFromConfig(config);
EXPECT_TRUE(QuicConnectionPeer::IsSilentCloseEnabled(&connection_));
const QuicTime::Delta default_idle_timeout =
QuicTime::Delta::FromSeconds(kDefaultIdleTimeoutSecs - 1);
const QuicTime::Delta five_ms = QuicTime::Delta::FromMilliseconds(5);
QuicTime default_timeout = clock_.ApproximateNow() + default_idle_timeout;
// When we send a packet, the timeout will change to 5ms +
// kInitialIdleTimeoutSecs.
clock_.AdvanceTime(five_ms);
SendStreamDataToPeer(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "foo",
0, FIN, nullptr);
EXPECT_EQ(default_timeout, connection_.GetTimeoutAlarm()->deadline());
// Indicate streams are still open.
EXPECT_CALL(visitor_, HasOpenDynamicStreams()).WillRepeatedly(Return(true));
// This time, we should time out and send a connection close due to the TLP.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_NETWORK_IDLE_TIMEOUT, _,
ConnectionCloseSource::FROM_SELF));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
clock_.AdvanceTime(connection_.GetTimeoutAlarm()->deadline() -
clock_.ApproximateNow() + five_ms);
connection_.GetTimeoutAlarm()->Fire();
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_FALSE(connection_.connected());
}
TEST_P(QuicConnectionTest, TimeoutAfterReceive) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
QuicConfig config;
connection_.SetFromConfig(config);
EXPECT_FALSE(QuicConnectionPeer::IsSilentCloseEnabled(&connection_));
const QuicTime::Delta initial_idle_timeout =
QuicTime::Delta::FromSeconds(kInitialIdleTimeoutSecs - 1);
const QuicTime::Delta five_ms = QuicTime::Delta::FromMilliseconds(5);
QuicTime default_timeout = clock_.ApproximateNow() + initial_idle_timeout;
connection_.SendStreamDataWithString(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "foo",
0, NO_FIN);
connection_.SendStreamDataWithString(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "foo",
3, NO_FIN);
EXPECT_EQ(default_timeout, connection_.GetTimeoutAlarm()->deadline());
clock_.AdvanceTime(five_ms);
// When we receive a packet, the timeout will change to 5ms +
// kInitialIdleTimeoutSecs.
QuicAckFrame ack = InitAckFrame(2);
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
ProcessAckPacket(&ack);
// The original alarm will fire. We should not time out because we had a
// network event at t=5ms. The alarm will reregister.
clock_.AdvanceTime(initial_idle_timeout - five_ms);
EXPECT_EQ(default_timeout, clock_.ApproximateNow());
connection_.GetTimeoutAlarm()->Fire();
EXPECT_TRUE(connection_.connected());
EXPECT_TRUE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_EQ(default_timeout + five_ms,
connection_.GetTimeoutAlarm()->deadline());
// This time, we should time out.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_NETWORK_IDLE_TIMEOUT, _,
ConnectionCloseSource::FROM_SELF));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
clock_.AdvanceTime(five_ms);
EXPECT_EQ(default_timeout + five_ms, clock_.ApproximateNow());
connection_.GetTimeoutAlarm()->Fire();
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_FALSE(connection_.connected());
}
TEST_P(QuicConnectionTest, TimeoutAfterReceiveNotSendWhenUnacked) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
QuicConfig config;
connection_.SetFromConfig(config);
EXPECT_FALSE(QuicConnectionPeer::IsSilentCloseEnabled(&connection_));
const QuicTime::Delta initial_idle_timeout =
QuicTime::Delta::FromSeconds(kInitialIdleTimeoutSecs - 1);
connection_.SetNetworkTimeouts(
QuicTime::Delta::Infinite(),
initial_idle_timeout + QuicTime::Delta::FromSeconds(1));
const QuicTime::Delta five_ms = QuicTime::Delta::FromMilliseconds(5);
QuicTime default_timeout = clock_.ApproximateNow() + initial_idle_timeout;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
connection_.SendStreamDataWithString(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "foo",
0, NO_FIN);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
connection_.SendStreamDataWithString(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "foo",
3, NO_FIN);
EXPECT_EQ(default_timeout, connection_.GetTimeoutAlarm()->deadline());
clock_.AdvanceTime(five_ms);
// When we receive a packet, the timeout will change to 5ms +
// kInitialIdleTimeoutSecs.
QuicAckFrame ack = InitAckFrame(2);
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
ProcessAckPacket(&ack);
// The original alarm will fire. We should not time out because we had a
// network event at t=5ms. The alarm will reregister.
clock_.AdvanceTime(initial_idle_timeout - five_ms);
EXPECT_EQ(default_timeout, clock_.ApproximateNow());
connection_.GetTimeoutAlarm()->Fire();
EXPECT_TRUE(connection_.connected());
EXPECT_TRUE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_EQ(default_timeout + five_ms,
connection_.GetTimeoutAlarm()->deadline());
// Now, send packets while advancing the time and verify that the connection
// eventually times out.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_NETWORK_IDLE_TIMEOUT, _,
ConnectionCloseSource::FROM_SELF));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(AnyNumber());
for (int i = 0; i < 100 && connection_.connected(); ++i) {
QUIC_LOG(INFO) << "sending data packet";
connection_.SendStreamDataWithString(
GetNthClientInitiatedStreamId(1, connection_.transport_version()),
"foo", 0, NO_FIN);
connection_.GetTimeoutAlarm()->Fire();
clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
}
EXPECT_FALSE(connection_.connected());
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, TimeoutAfter5ClientRTOs) {
connection_.SetMaxTailLossProbes(2);
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
QuicConfig config;
QuicTagVector connection_options;
connection_options.push_back(k5RTO);
config.SetConnectionOptionsToSend(connection_options);
connection_.SetFromConfig(config);
// Send stream data.
SendStreamDataToPeer(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "foo",
0, FIN, nullptr);
// Fire the retransmission alarm 6 times, twice for TLP and 4 times for RTO.
for (int i = 0; i < 6; ++i) {
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
connection_.GetRetransmissionAlarm()->Fire();
EXPECT_TRUE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_TRUE(connection_.connected());
}
EXPECT_EQ(2u, connection_.sent_packet_manager().GetConsecutiveTlpCount());
EXPECT_EQ(4u, connection_.sent_packet_manager().GetConsecutiveRtoCount());
// This time, we should time out.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_TOO_MANY_RTOS, _,
ConnectionCloseSource::FROM_SELF));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
connection_.GetRetransmissionAlarm()->Fire();
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_FALSE(connection_.connected());
}
TEST_P(QuicConnectionTest, SendScheduler) {
// Test that if we send a packet without delay, it is not queued.
QuicFramerPeer::SetPerspective(&peer_framer_, Perspective::IS_CLIENT);
std::unique_ptr<QuicPacket> packet = ConstructDataPacket(1, !kHasStopWaiting);
QuicPacketCreatorPeer::SetPacketNumber(creator_, 1);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
connection_.SendPacket(ENCRYPTION_NONE, 1, std::move(packet),
HAS_RETRANSMITTABLE_DATA, false, false);
EXPECT_EQ(0u, connection_.NumQueuedPackets());
}
TEST_P(QuicConnectionTest, FailToSendFirstPacket) {
// Test that the connection does not crash when it fails to send the first
// packet at which point self_address_ might be uninitialized.
QuicFramerPeer::SetPerspective(&peer_framer_, Perspective::IS_CLIENT);
EXPECT_CALL(visitor_, OnConnectionClosed(_, _, _)).Times(1);
std::unique_ptr<QuicPacket> packet = ConstructDataPacket(1, !kHasStopWaiting);
QuicPacketCreatorPeer::SetPacketNumber(creator_, 1);
writer_->SetShouldWriteFail();
connection_.SendPacket(ENCRYPTION_NONE, 1, std::move(packet),
HAS_RETRANSMITTABLE_DATA, false, false);
}
TEST_P(QuicConnectionTest, SendSchedulerEAGAIN) {
QuicFramerPeer::SetPerspective(&peer_framer_, Perspective::IS_CLIENT);
std::unique_ptr<QuicPacket> packet = ConstructDataPacket(1, !kHasStopWaiting);
QuicPacketCreatorPeer::SetPacketNumber(creator_, 1);
BlockOnNextWrite();
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, QuicPacketNumber(2u), _, _))
.Times(0);
connection_.SendPacket(ENCRYPTION_NONE, 1, std::move(packet),
HAS_RETRANSMITTABLE_DATA, false, false);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
}
TEST_P(QuicConnectionTest, TestQueueLimitsOnSendStreamData) {
// All packets carry version info till version is negotiated.
size_t payload_length;
size_t length = GetPacketLengthForOneStream(
connection_.version().transport_version, kIncludeVersion,
!kIncludeDiversificationNonce, PACKET_8BYTE_CONNECTION_ID,
PACKET_0BYTE_CONNECTION_ID,
QuicPacketCreatorPeer::GetPacketNumberLength(creator_), &payload_length);
connection_.SetMaxPacketLength(length);
// Queue the first packet.
EXPECT_CALL(*send_algorithm_, CanSend(_)).WillOnce(testing::Return(false));
const QuicString payload(payload_length, 'a');
EXPECT_EQ(0u, connection_.SendStreamDataWithString(3, payload, 0, NO_FIN)
.bytes_consumed);
EXPECT_EQ(0u, connection_.NumQueuedPackets());
}
TEST_P(QuicConnectionTest, LoopThroughSendingPackets) {
// All packets carry version info till version is negotiated.
size_t payload_length;
// Number of packets this test generates. The goal is to have
// kPacketCount packets, each the same size (overhead and payload).
// The payload will vary depending on the overhead (which in turn
// varies per the QUIC packet encoding rules).
const int kPacketCount = 7;
// Get the basic packet size. This assumes, among other things, a
// stream offset of 0.
size_t length = GetPacketLengthForOneStream(
connection_.version().transport_version, kIncludeVersion,
!kIncludeDiversificationNonce, PACKET_8BYTE_CONNECTION_ID,
PACKET_0BYTE_CONNECTION_ID,
QuicPacketCreatorPeer::GetPacketNumberLength(creator_), &payload_length);
// GetPacketLengthForOneStream() assumes a stream offset of 0 in determining
// packet length. The size of the offset field in a stream frame is
// 0 for offset 0, and 2 for non-zero offsets up through 16K (for
// versions other than 99) and 1 for non-zero offsets through 16K
// for version 99. Increase the length by 1 or 2, as apporpriate, so
// that subsequent packets containing subsequent stream frames with
// non-zero offsets will fit within the packet length.
if (connection_.version().transport_version == QUIC_VERSION_99) {
length = length + 1;
} else {
length = length + 2;
}
connection_.SetMaxPacketLength(length);
// Queue the first packet.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.Times(kPacketCount);
size_t total_payload_length = payload_length * kPacketCount;
// The first frame of the stream is at offset 0. When the offset is
// 0, it is not included in the stream frame. Increase the total
// payload so that the "missing" offset byte in the first packet is
// occupied by a payload byte. The net result is that each of the N
// packets of the test will contain a single stream frame, each of
// which will be the same size (overhead + data).
if (connection_.version().transport_version == QUIC_VERSION_99) {
// Version 99 encodes the offset in 1 byte for the scope of this test.
total_payload_length = total_payload_length + 1;
} else {
// Versions other than 99 encode the offset in 2 bytes for the
// scope of this test.
total_payload_length = total_payload_length + 2;
}
const QuicString payload(total_payload_length, 'a');
EXPECT_EQ(payload.size(),
connection_
.SendStreamDataWithString(QuicUtils::GetCryptoStreamId(
connection_.transport_version()),
payload, 0, NO_FIN)
.bytes_consumed);
}
TEST_P(QuicConnectionTest, LoopThroughSendingPacketsWithTruncation) {
set_perspective(Perspective::IS_SERVER);
if (GetParam().version.transport_version <= QUIC_VERSION_43) {
// For IETF QUIC, encryption level will be switched to FORWARD_SECURE in
// SendStreamDataWithString.
QuicPacketCreatorPeer::SetSendVersionInPacket(creator_, false);
}
// Set up a larger payload than will fit in one packet.
const QuicString payload(connection_.max_packet_length(), 'a');
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _)).Times(AnyNumber());
// Now send some packets with no truncation.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(2);
EXPECT_EQ(payload.size(),
connection_.SendStreamDataWithString(3, payload, 0, NO_FIN)
.bytes_consumed);
// Track the size of the second packet here. The overhead will be the largest
// we see in this test, due to the non-truncated connection id.
size_t non_truncated_packet_size = writer_->last_packet_size();
// Change to a 0 byte connection id.
QuicConfig config;
QuicConfigPeer::SetReceivedBytesForConnectionId(&config, 0);
connection_.SetFromConfig(config);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(2);
EXPECT_EQ(payload.size(),
connection_.SendStreamDataWithString(3, payload, 1350, NO_FIN)
.bytes_consumed);
if (connection_.transport_version() > QUIC_VERSION_43) {
// Short header packets sent from server omit connection ID already, and
// stream offset size increases from 0 to 2.
EXPECT_EQ(non_truncated_packet_size, writer_->last_packet_size() - 2);
} else {
// Just like above, we save 8 bytes on payload, and 8 on truncation. -2
// because stream offset size is 2 instead of 0.
EXPECT_EQ(non_truncated_packet_size,
writer_->last_packet_size() + 8 * 2 - 2);
}
}
TEST_P(QuicConnectionTest, SendDelayedAck) {
QuicTime ack_time = clock_.ApproximateNow() + DefaultDelayedAckTime();
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
const uint8_t tag = 0x07;
connection_.SetDecrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<StrictTaggingDecrypter>(tag));
peer_framer_.SetEncrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<TaggingEncrypter>(tag));
// Process a packet from the non-crypto stream.
frame1_.stream_id = 3;
// The same as ProcessPacket(1) except that ENCRYPTION_INITIAL is used
// instead of ENCRYPTION_NONE.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(1, !kHasStopWaiting, ENCRYPTION_INITIAL);
// Check if delayed ack timer is running for the expected interval.
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// Simulate delayed ack alarm firing.
connection_.GetAckAlarm()->Fire();
// Check that ack is sent and that delayed ack alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, SendDelayedAfterQuiescence) {
QuicConnectionPeer::SetFastAckAfterQuiescence(&connection_, true);
// The beginning of the connection counts as quiescence.
QuicTime ack_time =
clock_.ApproximateNow() + QuicTime::Delta::FromMilliseconds(1);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
const uint8_t tag = 0x07;
connection_.SetDecrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<StrictTaggingDecrypter>(tag));
peer_framer_.SetEncrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<TaggingEncrypter>(tag));
// Process a packet from the non-crypto stream.
frame1_.stream_id = 3;
// The same as ProcessPacket(1) except that ENCRYPTION_INITIAL is used
// instead of ENCRYPTION_NONE.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(1, !kHasStopWaiting, ENCRYPTION_INITIAL);
// Check if delayed ack timer is running for the expected interval.
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// Simulate delayed ack alarm firing.
connection_.GetAckAlarm()->Fire();
// Check that ack is sent and that delayed ack alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
// Process another packet immedately after sending the ack and expect the
// ack alarm to be set delayed ack time in the future.
ack_time = clock_.ApproximateNow() + DefaultDelayedAckTime();
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(2, !kHasStopWaiting, ENCRYPTION_INITIAL);
// Check if delayed ack timer is running for the expected interval.
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// Simulate delayed ack alarm firing.
connection_.GetAckAlarm()->Fire();
// Check that ack is sent and that delayed ack alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
// Wait 1 second and enesure the ack alarm is set to 1ms in the future.
clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
ack_time = clock_.ApproximateNow() + QuicTime::Delta::FromMilliseconds(1);
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(3, !kHasStopWaiting, ENCRYPTION_INITIAL);
// Check if delayed ack timer is running for the expected interval.
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
}
TEST_P(QuicConnectionTest, SendDelayedAckDecimation) {
EXPECT_CALL(visitor_, OnAckNeedsRetransmittableFrame()).Times(AnyNumber());
QuicConnectionPeer::SetAckMode(&connection_, QuicConnection::ACK_DECIMATION);
const size_t kMinRttMs = 40;
RttStats* rtt_stats = const_cast<RttStats*>(manager_->GetRttStats());
rtt_stats->UpdateRtt(QuicTime::Delta::FromMilliseconds(kMinRttMs),
QuicTime::Delta::Zero(), QuicTime::Zero());
// The ack time should be based on min_rtt/4, since it's less than the
// default delayed ack time.
QuicTime ack_time = clock_.ApproximateNow() +
QuicTime::Delta::FromMilliseconds(kMinRttMs / 4);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
const uint8_t tag = 0x07;
connection_.SetDecrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<StrictTaggingDecrypter>(tag));
peer_framer_.SetEncrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<TaggingEncrypter>(tag));
// Process a packet from the non-crypto stream.
frame1_.stream_id = 3;
// Process all the initial packets in order so there aren't missing packets.
uint64_t kFirstDecimatedPacket = 101;
for (unsigned int i = 0; i < kFirstDecimatedPacket - 1; ++i) {
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(1 + i, !kHasStopWaiting, ENCRYPTION_INITIAL);
}
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
// The same as ProcessPacket(1) except that ENCRYPTION_INITIAL is used
// instead of ENCRYPTION_NONE.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket, !kHasStopWaiting,
ENCRYPTION_INITIAL);
// Check if delayed ack timer is running for the expected interval.
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// The 10th received packet causes an ack to be sent.
for (int i = 0; i < 9; ++i) {
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket + 1 + i, !kHasStopWaiting,
ENCRYPTION_INITIAL);
}
// Check that ack is sent and that delayed ack alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, SendDelayedAckAckDecimationAfterQuiescence) {
EXPECT_CALL(visitor_, OnAckNeedsRetransmittableFrame()).Times(AnyNumber());
QuicConnectionPeer::SetAckMode(&connection_, QuicConnection::ACK_DECIMATION);
QuicConnectionPeer::SetFastAckAfterQuiescence(&connection_, true);
const size_t kMinRttMs = 40;
RttStats* rtt_stats = const_cast<RttStats*>(manager_->GetRttStats());
rtt_stats->UpdateRtt(QuicTime::Delta::FromMilliseconds(kMinRttMs),
QuicTime::Delta::Zero(), QuicTime::Zero());
// The beginning of the connection counts as quiescence.
QuicTime ack_time =
clock_.ApproximateNow() + QuicTime::Delta::FromMilliseconds(1);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
const uint8_t tag = 0x07;
connection_.SetDecrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<StrictTaggingDecrypter>(tag));
peer_framer_.SetEncrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<TaggingEncrypter>(tag));
// Process a packet from the non-crypto stream.
frame1_.stream_id = 3;
// The same as ProcessPacket(1) except that ENCRYPTION_INITIAL is used
// instead of ENCRYPTION_NONE.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(1, !kHasStopWaiting, ENCRYPTION_INITIAL);
// Check if delayed ack timer is running for the expected interval.
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// Simulate delayed ack alarm firing.
connection_.GetAckAlarm()->Fire();
// Check that ack is sent and that delayed ack alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
// Process another packet immedately after sending the ack and expect the
// ack alarm to be set delayed ack time in the future.
ack_time = clock_.ApproximateNow() + DefaultDelayedAckTime();
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(2, !kHasStopWaiting, ENCRYPTION_INITIAL);
// Check if delayed ack timer is running for the expected interval.
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// Simulate delayed ack alarm firing.
connection_.GetAckAlarm()->Fire();
// Check that ack is sent and that delayed ack alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
// Wait 1 second and enesure the ack alarm is set to 1ms in the future.
clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
ack_time = clock_.ApproximateNow() + QuicTime::Delta::FromMilliseconds(1);
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(3, !kHasStopWaiting, ENCRYPTION_INITIAL);
// Check if delayed ack timer is running for the expected interval.
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// Process enough packets to get into ack decimation behavior.
// The ack time should be based on min_rtt/4, since it's less than the
// default delayed ack time.
ack_time = clock_.ApproximateNow() +
QuicTime::Delta::FromMilliseconds(kMinRttMs / 4);
uint64_t kFirstDecimatedPacket = 101;
for (unsigned int i = 0; i < kFirstDecimatedPacket - 4; ++i) {
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(4 + i, !kHasStopWaiting, ENCRYPTION_INITIAL);
}
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
// The same as ProcessPacket(1) except that ENCRYPTION_INITIAL is used
// instead of ENCRYPTION_NONE.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket, !kHasStopWaiting,
ENCRYPTION_INITIAL);
// Check if delayed ack timer is running for the expected interval.
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// The 10th received packet causes an ack to be sent.
for (int i = 0; i < 9; ++i) {
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket + 1 + i, !kHasStopWaiting,
ENCRYPTION_INITIAL);
}
// Check that ack is sent and that delayed ack alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
// Wait 1 second and enesure the ack alarm is set to 1ms in the future.
clock_.AdvanceTime(QuicTime::Delta::FromSeconds(1));
ack_time = clock_.ApproximateNow() + QuicTime::Delta::FromMilliseconds(1);
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket + 10, !kHasStopWaiting,
ENCRYPTION_INITIAL);
// Check if delayed ack timer is running for the expected interval.
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
}
TEST_P(QuicConnectionTest, SendDelayedAckDecimationUnlimitedAggregation) {
EXPECT_CALL(visitor_, OnAckNeedsRetransmittableFrame()).Times(AnyNumber());
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
QuicConfig config;
QuicTagVector connection_options;
connection_options.push_back(kACKD);
// No limit on the number of packets received before sending an ack.
connection_options.push_back(kAKDU);
config.SetConnectionOptionsToSend(connection_options);
connection_.SetFromConfig(config);
const size_t kMinRttMs = 40;
RttStats* rtt_stats = const_cast<RttStats*>(manager_->GetRttStats());
rtt_stats->UpdateRtt(QuicTime::Delta::FromMilliseconds(kMinRttMs),
QuicTime::Delta::Zero(), QuicTime::Zero());
// The ack time should be based on min_rtt/4, since it's less than the
// default delayed ack time.
QuicTime ack_time = clock_.ApproximateNow() +
QuicTime::Delta::FromMilliseconds(kMinRttMs / 4);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
const uint8_t tag = 0x07;
connection_.SetDecrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<StrictTaggingDecrypter>(tag));
peer_framer_.SetEncrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<TaggingEncrypter>(tag));
// Process a packet from the non-crypto stream.
frame1_.stream_id = 3;
// Process all the initial packets in order so there aren't missing packets.
uint64_t kFirstDecimatedPacket = 101;
for (unsigned int i = 0; i < kFirstDecimatedPacket - 1; ++i) {
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(1 + i, !kHasStopWaiting, ENCRYPTION_INITIAL);
}
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
// The same as ProcessPacket(1) except that ENCRYPTION_INITIAL is used
// instead of ENCRYPTION_NONE.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket, !kHasStopWaiting,
ENCRYPTION_INITIAL);
// Check if delayed ack timer is running for the expected interval.
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// 18 packets will not cause an ack to be sent. 19 will because when
// stop waiting frames are in use, we ack every 20 packets no matter what.
for (int i = 0; i < 18; ++i) {
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket + 1 + i, !kHasStopWaiting,
ENCRYPTION_INITIAL);
}
// The delayed ack timer should still be set to the expected deadline.
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
}
TEST_P(QuicConnectionTest, SendDelayedAckDecimationEighthRtt) {
EXPECT_CALL(visitor_, OnAckNeedsRetransmittableFrame()).Times(AnyNumber());
QuicConnectionPeer::SetAckMode(&connection_, QuicConnection::ACK_DECIMATION);
QuicConnectionPeer::SetAckDecimationDelay(&connection_, 0.125);
const size_t kMinRttMs = 40;
RttStats* rtt_stats = const_cast<RttStats*>(manager_->GetRttStats());
rtt_stats->UpdateRtt(QuicTime::Delta::FromMilliseconds(kMinRttMs),
QuicTime::Delta::Zero(), QuicTime::Zero());
// The ack time should be based on min_rtt/8, since it's less than the
// default delayed ack time.
QuicTime ack_time = clock_.ApproximateNow() +
QuicTime::Delta::FromMilliseconds(kMinRttMs / 8);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
const uint8_t tag = 0x07;
connection_.SetDecrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<StrictTaggingDecrypter>(tag));
peer_framer_.SetEncrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<TaggingEncrypter>(tag));
// Process a packet from the non-crypto stream.
frame1_.stream_id = 3;
// Process all the initial packets in order so there aren't missing packets.
uint64_t kFirstDecimatedPacket = 101;
for (unsigned int i = 0; i < kFirstDecimatedPacket - 1; ++i) {
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(1 + i, !kHasStopWaiting, ENCRYPTION_INITIAL);
}
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
// The same as ProcessPacket(1) except that ENCRYPTION_INITIAL is used
// instead of ENCRYPTION_NONE.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket, !kHasStopWaiting,
ENCRYPTION_INITIAL);
// Check if delayed ack timer is running for the expected interval.
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// The 10th received packet causes an ack to be sent.
for (int i = 0; i < 9; ++i) {
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket + 1 + i, !kHasStopWaiting,
ENCRYPTION_INITIAL);
}
// Check that ack is sent and that delayed ack alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, SendDelayedAckDecimationWithReordering) {
if (GetQuicReloadableFlag(quic_enable_ack_decimation) &&
!GetQuicReloadableFlag(quic_keep_ack_decimation_reordering)) {
return;
}
EXPECT_CALL(visitor_, OnAckNeedsRetransmittableFrame()).Times(AnyNumber());
QuicConnectionPeer::SetAckMode(
&connection_, QuicConnection::ACK_DECIMATION_WITH_REORDERING);
const size_t kMinRttMs = 40;
RttStats* rtt_stats = const_cast<RttStats*>(manager_->GetRttStats());
rtt_stats->UpdateRtt(QuicTime::Delta::FromMilliseconds(kMinRttMs),
QuicTime::Delta::Zero(), QuicTime::Zero());
// The ack time should be based on min_rtt/4, since it's less than the
// default delayed ack time.
QuicTime ack_time = clock_.ApproximateNow() +
QuicTime::Delta::FromMilliseconds(kMinRttMs / 4);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
const uint8_t tag = 0x07;
connection_.SetDecrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<StrictTaggingDecrypter>(tag));
peer_framer_.SetEncrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<TaggingEncrypter>(tag));
// Process a packet from the non-crypto stream.
frame1_.stream_id = 3;
// Process all the initial packets in order so there aren't missing packets.
uint64_t kFirstDecimatedPacket = 101;
for (unsigned int i = 0; i < kFirstDecimatedPacket - 1; ++i) {
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(1 + i, !kHasStopWaiting, ENCRYPTION_INITIAL);
}
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
// Receive one packet out of order and then the rest in order.
// The loop leaves a one packet gap between acks sent to simulate some loss.
for (int j = 0; j < 3; ++j) {
// Process packet 10 first and ensure the alarm is one eighth min_rtt.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket + 9 + (j * 11),
!kHasStopWaiting, ENCRYPTION_INITIAL);
ack_time = clock_.ApproximateNow() + QuicTime::Delta::FromMilliseconds(5);
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// The 10th received packet causes an ack to be sent.
writer_->Reset();
for (int i = 0; i < 9; ++i) {
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
// The ACK shouldn't be sent until the 10th packet is processed.
EXPECT_TRUE(writer_->ack_frames().empty());
ProcessDataPacketAtLevel(kFirstDecimatedPacket + i + (j * 11),
!kHasStopWaiting, ENCRYPTION_INITIAL);
}
// Check that ack is sent and that delayed ack alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
}
}
TEST_P(QuicConnectionTest, SendDelayedAckDecimationWithLargeReordering) {
if (GetQuicReloadableFlag(quic_enable_ack_decimation) &&
!GetQuicReloadableFlag(quic_keep_ack_decimation_reordering)) {
return;
}
EXPECT_CALL(visitor_, OnAckNeedsRetransmittableFrame()).Times(AnyNumber());
QuicConnectionPeer::SetAckMode(
&connection_, QuicConnection::ACK_DECIMATION_WITH_REORDERING);
const size_t kMinRttMs = 40;
RttStats* rtt_stats = const_cast<RttStats*>(manager_->GetRttStats());
rtt_stats->UpdateRtt(QuicTime::Delta::FromMilliseconds(kMinRttMs),
QuicTime::Delta::Zero(), QuicTime::Zero());
// The ack time should be based on min_rtt/4, since it's less than the
// default delayed ack time.
QuicTime ack_time = clock_.ApproximateNow() +
QuicTime::Delta::FromMilliseconds(kMinRttMs / 4);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
const uint8_t tag = 0x07;
connection_.SetDecrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<StrictTaggingDecrypter>(tag));
peer_framer_.SetEncrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<TaggingEncrypter>(tag));
// Process a packet from the non-crypto stream.
frame1_.stream_id = 3;
// Process all the initial packets in order so there aren't missing packets.
uint64_t kFirstDecimatedPacket = 101;
for (unsigned int i = 0; i < kFirstDecimatedPacket - 1; ++i) {
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(1 + i, !kHasStopWaiting, ENCRYPTION_INITIAL);
}
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
// The same as ProcessPacket(1) except that ENCRYPTION_INITIAL is used
// instead of ENCRYPTION_NONE.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket, !kHasStopWaiting,
ENCRYPTION_INITIAL);
// Check if delayed ack timer is running for the expected interval.
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// Process packet 10 first and ensure the alarm is one eighth min_rtt.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket + 19, !kHasStopWaiting,
ENCRYPTION_INITIAL);
ack_time = clock_.ApproximateNow() + QuicTime::Delta::FromMilliseconds(5);
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// The 10th received packet causes an ack to be sent.
for (int i = 0; i < 8; ++i) {
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket + 1 + i, !kHasStopWaiting,
ENCRYPTION_INITIAL);
}
// Check that ack is sent and that delayed ack alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
// The next packet received in order will cause an immediate ack,
// because it fills a hole.
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket + 10, !kHasStopWaiting,
ENCRYPTION_INITIAL);
// Check that ack is sent and that delayed ack alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, SendDelayedAckDecimationWithReorderingEighthRtt) {
if (GetQuicReloadableFlag(quic_enable_ack_decimation) &&
!GetQuicReloadableFlag(quic_keep_ack_decimation_reordering)) {
return;
}
EXPECT_CALL(visitor_, OnAckNeedsRetransmittableFrame()).Times(AnyNumber());
QuicConnectionPeer::SetAckMode(
&connection_, QuicConnection::ACK_DECIMATION_WITH_REORDERING);
QuicConnectionPeer::SetAckDecimationDelay(&connection_, 0.125);
const size_t kMinRttMs = 40;
RttStats* rtt_stats = const_cast<RttStats*>(manager_->GetRttStats());
rtt_stats->UpdateRtt(QuicTime::Delta::FromMilliseconds(kMinRttMs),
QuicTime::Delta::Zero(), QuicTime::Zero());
// The ack time should be based on min_rtt/8, since it's less than the
// default delayed ack time.
QuicTime ack_time = clock_.ApproximateNow() +
QuicTime::Delta::FromMilliseconds(kMinRttMs / 8);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
const uint8_t tag = 0x07;
connection_.SetDecrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<StrictTaggingDecrypter>(tag));
peer_framer_.SetEncrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<TaggingEncrypter>(tag));
// Process a packet from the non-crypto stream.
frame1_.stream_id = 3;
// Process all the initial packets in order so there aren't missing packets.
uint64_t kFirstDecimatedPacket = 101;
for (unsigned int i = 0; i < kFirstDecimatedPacket - 1; ++i) {
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(1 + i, !kHasStopWaiting, ENCRYPTION_INITIAL);
}
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
// The same as ProcessPacket(1) except that ENCRYPTION_INITIAL is used
// instead of ENCRYPTION_NONE.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket, !kHasStopWaiting,
ENCRYPTION_INITIAL);
// Check if delayed ack timer is running for the expected interval.
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// Process packet 10 first and ensure the alarm is one eighth min_rtt.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket + 9, !kHasStopWaiting,
ENCRYPTION_INITIAL);
ack_time = clock_.ApproximateNow() + QuicTime::Delta::FromMilliseconds(5);
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// The 10th received packet causes an ack to be sent.
for (int i = 0; i < 8; ++i) {
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket + 1 + i, !kHasStopWaiting,
ENCRYPTION_INITIAL);
}
// Check that ack is sent and that delayed ack alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
}
TEST_P(QuicConnectionTest,
SendDelayedAckDecimationWithLargeReorderingEighthRtt) {
if (GetQuicReloadableFlag(quic_enable_ack_decimation) &&
!GetQuicReloadableFlag(quic_keep_ack_decimation_reordering)) {
return;
}
EXPECT_CALL(visitor_, OnAckNeedsRetransmittableFrame()).Times(AnyNumber());
QuicConnectionPeer::SetAckMode(
&connection_, QuicConnection::ACK_DECIMATION_WITH_REORDERING);
QuicConnectionPeer::SetAckDecimationDelay(&connection_, 0.125);
const size_t kMinRttMs = 40;
RttStats* rtt_stats = const_cast<RttStats*>(manager_->GetRttStats());
rtt_stats->UpdateRtt(QuicTime::Delta::FromMilliseconds(kMinRttMs),
QuicTime::Delta::Zero(), QuicTime::Zero());
// The ack time should be based on min_rtt/8, since it's less than the
// default delayed ack time.
QuicTime ack_time = clock_.ApproximateNow() +
QuicTime::Delta::FromMilliseconds(kMinRttMs / 8);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
const uint8_t tag = 0x07;
connection_.SetDecrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<StrictTaggingDecrypter>(tag));
peer_framer_.SetEncrypter(ENCRYPTION_INITIAL,
QuicMakeUnique<TaggingEncrypter>(tag));
// Process a packet from the non-crypto stream.
frame1_.stream_id = 3;
// Process all the initial packets in order so there aren't missing packets.
uint64_t kFirstDecimatedPacket = 101;
for (unsigned int i = 0; i < kFirstDecimatedPacket - 1; ++i) {
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(1 + i, !kHasStopWaiting, ENCRYPTION_INITIAL);
}
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
// The same as ProcessPacket(1) except that ENCRYPTION_INITIAL is used
// instead of ENCRYPTION_NONE.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket, !kHasStopWaiting,
ENCRYPTION_INITIAL);
// Check if delayed ack timer is running for the expected interval.
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// Process packet 10 first and ensure the alarm is one eighth min_rtt.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket + 19, !kHasStopWaiting,
ENCRYPTION_INITIAL);
ack_time = clock_.ApproximateNow() + QuicTime::Delta::FromMilliseconds(5);
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// The 10th received packet causes an ack to be sent.
for (int i = 0; i < 8; ++i) {
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket + 1 + i, !kHasStopWaiting,
ENCRYPTION_INITIAL);
}
// Check that ack is sent and that delayed ack alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
// The next packet received in order will cause an immediate ack,
// because it fills a hole.
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacketAtLevel(kFirstDecimatedPacket + 10, !kHasStopWaiting,
ENCRYPTION_INITIAL);
// Check that ack is sent and that delayed ack alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, SendDelayedAckOnHandshakeConfirmed) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(1);
// Check that ack is sent and that delayed ack alarm is set.
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
QuicTime ack_time = clock_.ApproximateNow() + DefaultDelayedAckTime();
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// Completing the handshake as the server does nothing.
QuicConnectionPeer::SetPerspective(&connection_, Perspective::IS_SERVER);
connection_.OnHandshakeComplete();
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(ack_time, connection_.GetAckAlarm()->deadline());
// Complete the handshake as the client decreases the delayed ack time to 0ms.
QuicConnectionPeer::SetPerspective(&connection_, Perspective::IS_CLIENT);
connection_.OnHandshakeComplete();
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
EXPECT_EQ(clock_.ApproximateNow(), connection_.GetAckAlarm()->deadline());
}
TEST_P(QuicConnectionTest, SendDelayedAckOnSecondPacket) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(1);
ProcessPacket(2);
// Check that ack is sent and that delayed ack alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, NoAckOnOldNacks) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Drop one packet, triggering a sequence of acks.
ProcessPacket(2);
size_t frames_per_ack = GetParam().no_stop_waiting ? 1 : 2;
EXPECT_EQ(frames_per_ack, writer_->frame_count());
EXPECT_FALSE(writer_->ack_frames().empty());
writer_->Reset();
ProcessPacket(3);
EXPECT_EQ(frames_per_ack, writer_->frame_count());
EXPECT_FALSE(writer_->ack_frames().empty());
writer_->Reset();
ProcessPacket(4);
EXPECT_EQ(frames_per_ack, writer_->frame_count());
EXPECT_FALSE(writer_->ack_frames().empty());
writer_->Reset();
ProcessPacket(5);
EXPECT_EQ(frames_per_ack, writer_->frame_count());
EXPECT_FALSE(writer_->ack_frames().empty());
writer_->Reset();
// Now only set the timer on the 6th packet, instead of sending another ack.
ProcessPacket(6);
EXPECT_EQ(0u, writer_->frame_count());
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, SendDelayedAckOnOutgoingPacket) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(1);
connection_.SendStreamDataWithString(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "foo",
0, NO_FIN);
// Check that ack is bundled with outgoing data and that delayed ack
// alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(3u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, SendDelayedAckOnOutgoingCryptoPacket) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(1);
connection_.SendStreamDataWithString(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), "foo", 0,
NO_FIN);
// Check that ack is bundled with outgoing crypto data.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(3u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(4u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, BlockAndBufferOnFirstCHLOPacketOfTwo) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(1);
BlockOnNextWrite();
writer_->set_is_write_blocked_data_buffered(true);
connection_.SendStreamDataWithString(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), "foo", 0,
NO_FIN);
EXPECT_TRUE(writer_->IsWriteBlocked());
EXPECT_FALSE(connection_.HasQueuedData());
connection_.SendStreamDataWithString(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), "bar", 3,
NO_FIN);
EXPECT_TRUE(writer_->IsWriteBlocked());
EXPECT_TRUE(connection_.HasQueuedData());
}
TEST_P(QuicConnectionTest, BundleAckForSecondCHLO) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
EXPECT_CALL(visitor_, OnCanWrite())
.WillOnce(IgnoreResult(InvokeWithoutArgs(
&connection_, &TestConnection::SendCryptoStreamData)));
// Process a packet from the crypto stream, which is frame1_'s default.
// Receiving the CHLO as packet 2 first will cause the connection to
// immediately send an ack, due to the packet gap.
ProcessPacket(2);
// Check that ack is sent and that delayed ack alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(3u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(4u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_EQ(1u, writer_->stream_frames().size());
EXPECT_EQ(1u, writer_->padding_frames().size());
ASSERT_FALSE(writer_->ack_frames().empty());
EXPECT_EQ(QuicPacketNumber(2u), LargestAcked(writer_->ack_frames().front()));
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, BundleAckForSecondCHLOTwoPacketReject) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
// Process two packets from the crypto stream, which is frame1_'s default,
// simulating a 2 packet reject.
{
ProcessPacket(1);
// Send the new CHLO when the REJ is processed.
EXPECT_CALL(visitor_, OnStreamFrame(_))
.WillOnce(IgnoreResult(InvokeWithoutArgs(
&connection_, &TestConnection::SendCryptoStreamData)));
ProcessDataPacket(2);
}
// Check that ack is sent and that delayed ack alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(3u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(4u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_EQ(1u, writer_->stream_frames().size());
EXPECT_EQ(1u, writer_->padding_frames().size());
ASSERT_FALSE(writer_->ack_frames().empty());
EXPECT_EQ(QuicPacketNumber(2u), LargestAcked(writer_->ack_frames().front()));
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, BundleAckWithDataOnIncomingAck) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
connection_.SendStreamDataWithString(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "foo",
0, NO_FIN);
connection_.SendStreamDataWithString(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "foo",
3, NO_FIN);
// Ack the second packet, which will retransmit the first packet.
QuicAckFrame ack = ConstructAckFrame(2, 1);
LostPacketVector lost_packets;
lost_packets.push_back(LostPacket(QuicPacketNumber(1), kMaxPacketSize));
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _))
.WillOnce(SetArgPointee<5>(lost_packets));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
ProcessAckPacket(&ack);
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_EQ(1u, writer_->stream_frames().size());
writer_->Reset();
// Now ack the retransmission, which will both raise the high water mark
// and see if there is more data to send.
ack = ConstructAckFrame(3, 1);
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
ProcessAckPacket(&ack);
// Check that no packet is sent and the ack alarm isn't set.
EXPECT_EQ(0u, writer_->frame_count());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
writer_->Reset();
// Send the same ack, but send both data and an ack together.
ack = ConstructAckFrame(3, 1);
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _));
EXPECT_CALL(visitor_, OnCanWrite())
.WillOnce(IgnoreResult(InvokeWithoutArgs(
&connection_, &TestConnection::EnsureWritableAndSendStreamData5)));
ProcessAckPacket(&ack);
// Check that ack is bundled with outgoing data and the delayed ack
// alarm is reset.
if (GetParam().no_stop_waiting) {
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_TRUE(writer_->stop_waiting_frames().empty());
} else {
EXPECT_EQ(3u, writer_->frame_count());
EXPECT_FALSE(writer_->stop_waiting_frames().empty());
}
EXPECT_FALSE(writer_->ack_frames().empty());
EXPECT_EQ(QuicPacketNumber(3u), LargestAcked(writer_->ack_frames().front()));
EXPECT_EQ(1u, writer_->stream_frames().size());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, NoAckSentForClose) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(1);
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_PEER_GOING_AWAY, _,
ConnectionCloseSource::FROM_PEER));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(0);
ProcessClosePacket(2);
}
TEST_P(QuicConnectionTest, SendWhenDisconnected) {
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_PEER_GOING_AWAY, _,
ConnectionCloseSource::FROM_SELF));
connection_.CloseConnection(QUIC_PEER_GOING_AWAY, "no reason",
ConnectionCloseBehavior::SILENT_CLOSE);
EXPECT_FALSE(connection_.connected());
EXPECT_FALSE(connection_.CanWriteStreamData());
std::unique_ptr<QuicPacket> packet = ConstructDataPacket(1, !kHasStopWaiting);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, QuicPacketNumber(1), _, _))
.Times(0);
connection_.SendPacket(ENCRYPTION_NONE, 1, std::move(packet),
HAS_RETRANSMITTABLE_DATA, false, false);
}
TEST_P(QuicConnectionTest, SendConnectivityProbingWhenDisconnected) {
// EXPECT_QUIC_BUG tests are expensive so only run one instance of them.
if (!IsDefaultTestConfiguration()) {
return;
}
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_PEER_GOING_AWAY, _,
ConnectionCloseSource::FROM_SELF));
connection_.CloseConnection(QUIC_PEER_GOING_AWAY, "no reason",
ConnectionCloseBehavior::SILENT_CLOSE);
EXPECT_FALSE(connection_.connected());
EXPECT_FALSE(connection_.CanWriteStreamData());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, QuicPacketNumber(1), _, _))
.Times(0);
EXPECT_QUIC_BUG(connection_.SendConnectivityProbingPacket(
writer_.get(), connection_.peer_address()),
"Not sending connectivity probing packet as connection is "
"disconnected.");
}
TEST_P(QuicConnectionTest, WriteBlockedAfterClientSendsConnectivityProbe) {
EXPECT_EQ(Perspective::IS_CLIENT, connection_.perspective());
TestPacketWriter probing_writer(version(), &clock_);
// Block next write so that sending connectivity probe will encounter a
// blocked write when send a connectivity probe to the peer.
probing_writer.BlockOnNextWrite();
// Connection will not be marked as write blocked as connectivity probe only
// affects the probing_writer which is not the default.
EXPECT_CALL(visitor_, OnWriteBlocked()).Times(0);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, QuicPacketNumber(1), _, _))
.Times(1);
connection_.SendConnectivityProbingPacket(&probing_writer,
connection_.peer_address());
}
TEST_P(QuicConnectionTest, WriterBlockedAfterServerSendsConnectivityProbe) {
set_perspective(Perspective::IS_SERVER);
QuicPacketCreatorPeer::SetSendVersionInPacket(creator_, false);
// Block next write so that sending connectivity probe will encounter a
// blocked write when send a connectivity probe to the peer.
writer_->BlockOnNextWrite();
// Connection will be marked as write blocked as server uses the default
// writer to send connectivity probes.
EXPECT_CALL(visitor_, OnWriteBlocked()).Times(1);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, QuicPacketNumber(1), _, _))
.Times(1);
connection_.SendConnectivityProbingPacket(writer_.get(),
connection_.peer_address());
}
TEST_P(QuicConnectionTest, WriterErrorWhenClientSendsConnectivityProbe) {
EXPECT_EQ(Perspective::IS_CLIENT, connection_.perspective());
TestPacketWriter probing_writer(version(), &clock_);
probing_writer.SetShouldWriteFail();
// Connection should not be closed if a connectivity probe is failed to be
// sent.
EXPECT_CALL(visitor_, OnConnectionClosed(_, _, _)).Times(0);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, QuicPacketNumber(1), _, _))
.Times(0);
connection_.SendConnectivityProbingPacket(&probing_writer,
connection_.peer_address());
}
TEST_P(QuicConnectionTest, WriterErrorWhenServerSendsConnectivityProbe) {
set_perspective(Perspective::IS_SERVER);
QuicPacketCreatorPeer::SetSendVersionInPacket(creator_, false);
writer_->SetShouldWriteFail();
// Connection should not be closed if a connectivity probe is failed to be
// sent.
EXPECT_CALL(visitor_, OnConnectionClosed(_, _, _)).Times(0);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, QuicPacketNumber(1), _, _))
.Times(0);
connection_.SendConnectivityProbingPacket(writer_.get(),
connection_.peer_address());
}
TEST_P(QuicConnectionTest, PublicReset) {
if (GetParam().version.transport_version > QUIC_VERSION_43) {
return;
}
QuicPublicResetPacket header;
// Public reset packet in only built by server.
header.connection_id = connection_id_;
std::unique_ptr<QuicEncryptedPacket> packet(
framer_.BuildPublicResetPacket(header));
std::unique_ptr<QuicReceivedPacket> received(
ConstructReceivedPacket(*packet, QuicTime::Zero()));
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_PUBLIC_RESET, _,
ConnectionCloseSource::FROM_PEER));
connection_.ProcessUdpPacket(kSelfAddress, kPeerAddress, *received);
}
TEST_P(QuicConnectionTest, IetfStatelessReset) {
if (GetParam().version.transport_version <= QUIC_VERSION_43) {
return;
}
const QuicUint128 kTestStatelessResetToken = 1010101;
QuicConfig config;
QuicConfigPeer::SetReceivedStatelessResetToken(&config,
kTestStatelessResetToken);
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
connection_.SetFromConfig(config);
std::unique_ptr<QuicEncryptedPacket> packet(
QuicFramer::BuildIetfStatelessResetPacket(connection_id_,
kTestStatelessResetToken));
std::unique_ptr<QuicReceivedPacket> received(
ConstructReceivedPacket(*packet, QuicTime::Zero()));
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_PUBLIC_RESET, _,
ConnectionCloseSource::FROM_PEER));
connection_.ProcessUdpPacket(kSelfAddress, kPeerAddress, *received);
}
TEST_P(QuicConnectionTest, GoAway) {
if (GetParam().version.transport_version == QUIC_VERSION_99) {
// GoAway is not available in version 99.
return;
}
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
QuicGoAwayFrame goaway;
goaway.last_good_stream_id = 1;
goaway.error_code = QUIC_PEER_GOING_AWAY;
goaway.reason_phrase = "Going away.";
EXPECT_CALL(visitor_, OnGoAway(_));
ProcessGoAwayPacket(&goaway);
}
TEST_P(QuicConnectionTest, WindowUpdate) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
QuicWindowUpdateFrame window_update;
window_update.stream_id = 3;
window_update.byte_offset = 1234;
EXPECT_CALL(visitor_, OnWindowUpdateFrame(_));
ProcessFramePacket(QuicFrame(&window_update));
}
TEST_P(QuicConnectionTest, Blocked) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
QuicBlockedFrame blocked;
blocked.stream_id = 3;
EXPECT_CALL(visitor_, OnBlockedFrame(_));
ProcessFramePacket(QuicFrame(&blocked));
EXPECT_EQ(1u, connection_.GetStats().blocked_frames_received);
EXPECT_EQ(0u, connection_.GetStats().blocked_frames_sent);
}
TEST_P(QuicConnectionTest, ZeroBytePacket) {
// Don't close the connection for zero byte packets.
EXPECT_CALL(visitor_, OnConnectionClosed(_, _, _)).Times(0);
QuicReceivedPacket encrypted(nullptr, 0, QuicTime::Zero());
connection_.ProcessUdpPacket(kSelfAddress, kPeerAddress, encrypted);
}
TEST_P(QuicConnectionTest, MissingPacketsBeforeLeastUnacked) {
if (GetParam().version.transport_version > QUIC_VERSION_43) {
return;
}
// Set the packet number of the ack packet to be least unacked (4).
QuicPacketCreatorPeer::SetPacketNumber(&peer_creator_, 3);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
QuicStopWaitingFrame frame = InitStopWaitingFrame(4);
ProcessStopWaitingPacket(&frame);
EXPECT_FALSE(outgoing_ack()->packets.Empty());
}
TEST_P(QuicConnectionTest, ServerSendsVersionNegotiationPacket) {
// Turn off QUIC_VERSION_99.
SetQuicReloadableFlag(quic_enable_version_99, false);
connection_.SetSupportedVersions(CurrentSupportedVersions());
set_perspective(Perspective::IS_SERVER);
if (GetParam().version.transport_version > QUIC_VERSION_43) {
peer_framer_.set_version_for_tests(
ParsedQuicVersion(PROTOCOL_QUIC_CRYPTO, QUIC_VERSION_99));
} else {
peer_framer_.set_version_for_tests(UnsupportedQuicVersion());
}
QuicPacketHeader header;
header.destination_connection_id = connection_id_;
header.version_flag = true;
header.packet_number = QuicPacketNumber(12);
QuicFrames frames;
frames.push_back(QuicFrame(frame1_));
std::unique_ptr<QuicPacket> packet(ConstructPacket(header, frames));
char buffer[kMaxPacketSize];
size_t encrypted_length = framer_.EncryptPayload(
ENCRYPTION_NONE, QuicPacketNumber(12), *packet, buffer, kMaxPacketSize);
framer_.set_version(version());
// Writer's framer's perspective is client, so that it needs to have the right
// version to process either IETF or GQUIC version negotiation packet.
writer_->SetSupportedVersions({version()});
connection_.ProcessUdpPacket(
kSelfAddress, kPeerAddress,
QuicReceivedPacket(buffer, encrypted_length, QuicTime::Zero(), false));
EXPECT_TRUE(writer_->version_negotiation_packet() != nullptr);
ParsedQuicVersionVector supported_versions = CurrentSupportedVersions();
ASSERT_EQ(supported_versions.size(),
writer_->version_negotiation_packet()->versions.size());
// We expect all versions in supported_versions to be
// included in the packet.
for (size_t i = 0; i < supported_versions.size(); ++i) {
EXPECT_EQ(supported_versions[i],
writer_->version_negotiation_packet()->versions[i]);
}
}
TEST_P(QuicConnectionTest, ServerSendsVersionNegotiationPacketSocketBlocked) {
// Turn off QUIC_VERSION_99.
SetQuicReloadableFlag(quic_enable_version_99, false);
connection_.SetSupportedVersions(CurrentSupportedVersions());
set_perspective(Perspective::IS_SERVER);
if (GetParam().version.transport_version > QUIC_VERSION_43) {
peer_framer_.set_version_for_tests(
ParsedQuicVersion(PROTOCOL_QUIC_CRYPTO, QUIC_VERSION_99));
} else {
peer_framer_.set_version_for_tests(UnsupportedQuicVersion());
}
QuicPacketHeader header;
header.destination_connection_id = connection_id_;
header.version_flag = true;
header.packet_number = QuicPacketNumber(12);
QuicFrames frames;
frames.push_back(QuicFrame(frame1_));
std::unique_ptr<QuicPacket> packet(ConstructPacket(header, frames));
char buffer[kMaxPacketSize];
size_t encrypted_length = framer_.EncryptPayload(
ENCRYPTION_NONE, QuicPacketNumber(12), *packet, buffer, kMaxPacketSize);
framer_.set_version(version());
BlockOnNextWrite();
// Writer's framer's perspective is client, so that it needs to have the right
// version to process either IETF or GQUIC version negotiation packet.
writer_->SetSupportedVersions({version()});
connection_.ProcessUdpPacket(
kSelfAddress, kPeerAddress,
QuicReceivedPacket(buffer, encrypted_length, QuicTime::Zero(), false));
EXPECT_EQ(0u, writer_->last_packet_size());
EXPECT_TRUE(connection_.HasQueuedData());
writer_->SetWritable();
connection_.OnCanWrite();
EXPECT_TRUE(writer_->version_negotiation_packet() != nullptr);
ParsedQuicVersionVector supported_versions = CurrentSupportedVersions();
ASSERT_EQ(supported_versions.size(),
writer_->version_negotiation_packet()->versions.size());
// We expect all versions in supported_versions to be
// included in the packet.
for (size_t i = 0; i < supported_versions.size(); ++i) {
EXPECT_EQ(supported_versions[i],
writer_->version_negotiation_packet()->versions[i]);
}
}
TEST_P(QuicConnectionTest,
ServerSendsVersionNegotiationPacketSocketBlockedDataBuffered) {
// Turn off QUIC_VERSION_99.
SetQuicReloadableFlag(quic_enable_version_99, false);
connection_.SetSupportedVersions(CurrentSupportedVersions());
set_perspective(Perspective::IS_SERVER);
if (GetParam().version.transport_version > QUIC_VERSION_43) {
peer_framer_.set_version_for_tests(
ParsedQuicVersion(PROTOCOL_QUIC_CRYPTO, QUIC_VERSION_99));
} else {
peer_framer_.set_version_for_tests(UnsupportedQuicVersion());
}
QuicPacketHeader header;
header.destination_connection_id = connection_id_;
header.version_flag = true;
header.packet_number = QuicPacketNumber(12);
QuicFrames frames;
frames.push_back(QuicFrame(frame1_));
std::unique_ptr<QuicPacket> packet(ConstructPacket(header, frames));
char buffer[kMaxPacketSize];
size_t encryped_length = framer_.EncryptPayload(
ENCRYPTION_NONE, QuicPacketNumber(12), *packet, buffer, kMaxPacketSize);
framer_.set_version(version());
set_perspective(Perspective::IS_SERVER);
BlockOnNextWrite();
writer_->set_is_write_blocked_data_buffered(true);
// Writer's framer's perspective is client, so that it needs to have the right
// version to process either IETF or GQUIC version negotiation packet.
writer_->SetSupportedVersions({version()});
connection_.ProcessUdpPacket(
kSelfAddress, kPeerAddress,
QuicReceivedPacket(buffer, encryped_length, QuicTime::Zero(), false));
EXPECT_EQ(0u, writer_->last_packet_size());
EXPECT_FALSE(connection_.HasQueuedData());
}
TEST_P(QuicConnectionTest, ClientHandlesVersionNegotiation) {
// Start out with some unsupported version.
QuicConnectionPeer::GetFramer(&connection_)
->set_version_for_tests(ParsedQuicVersion(
PROTOCOL_UNSUPPORTED,
GetParam().version.transport_version == QUIC_VERSION_99
? QUIC_VERSION_99
: QUIC_VERSION_UNSUPPORTED));
// Send a version negotiation packet.
std::unique_ptr<QuicEncryptedPacket> encrypted(
peer_framer_.BuildVersionNegotiationPacket(
connection_id_, connection_.transport_version() > QUIC_VERSION_43,
AllSupportedVersions()));
std::unique_ptr<QuicReceivedPacket> received(
ConstructReceivedPacket(*encrypted, QuicTime::Zero()));
if (GetQuicReloadableFlag(quic_no_client_conn_ver_negotiation)) {
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_INVALID_VERSION, _,
ConnectionCloseSource::FROM_SELF));
}
connection_.ProcessUdpPacket(kSelfAddress, kPeerAddress, *received);
if (GetQuicReloadableFlag(quic_no_client_conn_ver_negotiation)) {
EXPECT_FALSE(connection_.connected());
return;
}
// Now force another packet. The connection should transition into
// NEGOTIATED_VERSION state and tell the packet creator to StopSendingVersion.
QuicPacketHeader header;
header.destination_connection_id = connection_id_;
header.destination_connection_id_length = PACKET_0BYTE_CONNECTION_ID;
header.packet_number = QuicPacketNumber(12);
header.version_flag = false;
QuicFrames frames;
frames.push_back(QuicFrame(frame1_));
std::unique_ptr<QuicPacket> packet(ConstructPacket(header, frames));
char buffer[kMaxPacketSize];
size_t encrypted_length = peer_framer_.EncryptPayload(
ENCRYPTION_NONE, QuicPacketNumber(12), *packet, buffer, kMaxPacketSize);
ASSERT_NE(0u, encrypted_length);
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
connection_.ProcessUdpPacket(
kSelfAddress, kPeerAddress,
QuicReceivedPacket(buffer, encrypted_length, QuicTime::Zero(), false));
if (GetParam().version.transport_version > QUIC_VERSION_43) {
// IETF QUIC stops sending version when switch to FORWARD_SECURE.
EXPECT_NE(ENCRYPTION_FORWARD_SECURE, connection_.encryption_level());
ASSERT_TRUE(QuicPacketCreatorPeer::SendVersionInPacket(creator_));
} else {
ASSERT_FALSE(QuicPacketCreatorPeer::SendVersionInPacket(creator_));
}
}
TEST_P(QuicConnectionTest, BadVersionNegotiation) {
// Send a version negotiation packet with the version the client started with.
// It should be rejected.
EXPECT_CALL(visitor_,
OnConnectionClosed(QUIC_INVALID_VERSION_NEGOTIATION_PACKET, _,
ConnectionCloseSource::FROM_SELF));
std::unique_ptr<QuicEncryptedPacket> encrypted(
framer_.BuildVersionNegotiationPacket(
connection_id_, connection_.transport_version() > QUIC_VERSION_43,
AllSupportedVersions()));
std::unique_ptr<QuicReceivedPacket> received(
ConstructReceivedPacket(*encrypted, QuicTime::Zero()));
connection_.ProcessUdpPacket(kSelfAddress, kPeerAddress, *received);
}
TEST_P(QuicConnectionTest, CheckSendStats) {
connection_.SetMaxTailLossProbes(0);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
connection_.SendStreamDataWithString(3, "first", 0, NO_FIN);
size_t first_packet_size = writer_->last_packet_size();
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
connection_.SendStreamDataWithString(5, "second", 0, NO_FIN);
size_t second_packet_size = writer_->last_packet_size();
// 2 retransmissions due to rto, 1 due to explicit nack.
EXPECT_CALL(*send_algorithm_, OnRetransmissionTimeout(true));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(3);
// Retransmit due to RTO.
clock_.AdvanceTime(QuicTime::Delta::FromSeconds(10));
connection_.GetRetransmissionAlarm()->Fire();
// Retransmit due to explicit nacks.
QuicAckFrame nack_three =
InitAckFrame({{QuicPacketNumber(2), QuicPacketNumber(3)},
{QuicPacketNumber(4), QuicPacketNumber(5)}});
LostPacketVector lost_packets;
lost_packets.push_back(LostPacket(QuicPacketNumber(1), kMaxPacketSize));
lost_packets.push_back(LostPacket(QuicPacketNumber(3), kMaxPacketSize));
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _))
.WillOnce(SetArgPointee<5>(lost_packets));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
if (!connection_.session_decides_what_to_write()) {
EXPECT_CALL(visitor_, OnCanWrite());
}
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessAckPacket(&nack_three);
EXPECT_CALL(*send_algorithm_, BandwidthEstimate())
.WillOnce(Return(QuicBandwidth::Zero()));
const QuicConnectionStats& stats = connection_.GetStats();
// For IETF QUIC, version is not included as the encryption level switches to
// FORWARD_SECURE in SendStreamDataWithString.
size_t save_on_version =
GetParam().version.transport_version > QUIC_VERSION_43 ? 0
: kQuicVersionSize;
EXPECT_EQ(3 * first_packet_size + 2 * second_packet_size - save_on_version,
stats.bytes_sent);
EXPECT_EQ(5u, stats.packets_sent);
EXPECT_EQ(2 * first_packet_size + second_packet_size - save_on_version,
stats.bytes_retransmitted);
EXPECT_EQ(3u, stats.packets_retransmitted);
EXPECT_EQ(1u, stats.rto_count);
EXPECT_EQ(kDefaultMaxPacketSize, stats.max_packet_size);
}
TEST_P(QuicConnectionTest, ProcessFramesIfPacketClosedConnection) {
// Construct a packet with stream frame and connection close frame.
QuicPacketHeader header;
header.destination_connection_id = connection_id_;
if (peer_framer_.transport_version() > QUIC_VERSION_43) {
header.destination_connection_id_length = PACKET_0BYTE_CONNECTION_ID;
}
header.packet_number = QuicPacketNumber(1);
header.version_flag = false;
QuicConnectionCloseFrame qccf;
qccf.error_code = QUIC_PEER_GOING_AWAY;
QuicFrames frames;
frames.push_back(QuicFrame(frame1_));
frames.push_back(QuicFrame(&qccf));
std::unique_ptr<QuicPacket> packet(ConstructPacket(header, frames));
EXPECT_TRUE(nullptr != packet);
char buffer[kMaxPacketSize];
size_t encrypted_length = peer_framer_.EncryptPayload(
ENCRYPTION_NONE, QuicPacketNumber(1), *packet, buffer, kMaxPacketSize);
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_PEER_GOING_AWAY, _,
ConnectionCloseSource::FROM_PEER));
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
connection_.ProcessUdpPacket(
kSelfAddress, kPeerAddress,
QuicReceivedPacket(buffer, encrypted_length, QuicTime::Zero(), false));
}
TEST_P(QuicConnectionTest, SelectMutualVersion) {
connection_.SetSupportedVersions(AllSupportedVersions());
// Set the connection to speak the lowest quic version.
connection_.set_version(QuicVersionMin());
EXPECT_EQ(QuicVersionMin(), connection_.version());
// Pass in available versions which includes a higher mutually supported
// version. The higher mutually supported version should be selected.
ParsedQuicVersionVector supported_versions = AllSupportedVersions();
EXPECT_TRUE(connection_.SelectMutualVersion(supported_versions));
EXPECT_EQ(QuicVersionMax(), connection_.version());
// Expect that the lowest version is selected.
// Ensure the lowest supported version is less than the max, unless they're
// the same.
ParsedQuicVersionVector lowest_version_vector;
lowest_version_vector.push_back(QuicVersionMin());
EXPECT_TRUE(connection_.SelectMutualVersion(lowest_version_vector));
EXPECT_EQ(QuicVersionMin(), connection_.version());
// Shouldn't be able to find a mutually supported version.
ParsedQuicVersionVector unsupported_version;
unsupported_version.push_back(UnsupportedQuicVersion());
EXPECT_FALSE(connection_.SelectMutualVersion(unsupported_version));
}
TEST_P(QuicConnectionTest, ConnectionCloseWhenWritable) {
EXPECT_FALSE(writer_->IsWriteBlocked());
// Send a packet.
connection_.SendStreamDataWithString(1, "foo", 0, NO_FIN);
EXPECT_EQ(0u, connection_.NumQueuedPackets());
EXPECT_EQ(1u, writer_->packets_write_attempts());
TriggerConnectionClose();
EXPECT_EQ(2u, writer_->packets_write_attempts());
}
TEST_P(QuicConnectionTest, ConnectionCloseGettingWriteBlocked) {
BlockOnNextWrite();
TriggerConnectionClose();
EXPECT_EQ(1u, writer_->packets_write_attempts());
EXPECT_TRUE(writer_->IsWriteBlocked());
}
TEST_P(QuicConnectionTest, ConnectionCloseWhenWriteBlocked) {
BlockOnNextWrite();
connection_.SendStreamDataWithString(1, "foo", 0, NO_FIN);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
EXPECT_EQ(1u, writer_->packets_write_attempts());
EXPECT_TRUE(writer_->IsWriteBlocked());
TriggerConnectionClose();
EXPECT_EQ(1u, writer_->packets_write_attempts());
}
TEST_P(QuicConnectionTest, OnPacketSentDebugVisitor) {
MockQuicConnectionDebugVisitor debug_visitor;
connection_.set_debug_visitor(&debug_visitor);
EXPECT_CALL(debug_visitor, OnPacketSent(_, _, _, _)).Times(1);
connection_.SendStreamDataWithString(1, "foo", 0, NO_FIN);
EXPECT_CALL(debug_visitor, OnPacketSent(_, _, _, _)).Times(1);
connection_.SendConnectivityProbingPacket(writer_.get(),
connection_.peer_address());
}
TEST_P(QuicConnectionTest, OnPacketHeaderDebugVisitor) {
QuicPacketHeader header;
header.packet_number = QuicPacketNumber(1);
if (GetParam().version.transport_version > QUIC_VERSION_43) {
header.form = IETF_QUIC_LONG_HEADER_PACKET;
}
MockQuicConnectionDebugVisitor debug_visitor;
connection_.set_debug_visitor(&debug_visitor);
EXPECT_CALL(debug_visitor, OnPacketHeader(Ref(header))).Times(1);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_)).Times(1);
EXPECT_CALL(debug_visitor, OnSuccessfulVersionNegotiation(_)).Times(1);
connection_.OnPacketHeader(header);
}
TEST_P(QuicConnectionTest, Pacing) {
TestConnection server(connection_id_, kSelfAddress, helper_.get(),
alarm_factory_.get(), writer_.get(),
Perspective::IS_SERVER, version());
TestConnection client(connection_id_, kPeerAddress, helper_.get(),
alarm_factory_.get(), writer_.get(),
Perspective::IS_CLIENT, version());
EXPECT_FALSE(QuicSentPacketManagerPeer::UsingPacing(
static_cast<const QuicSentPacketManager*>(
&client.sent_packet_manager())));
EXPECT_FALSE(QuicSentPacketManagerPeer::UsingPacing(
static_cast<const QuicSentPacketManager*>(
&server.sent_packet_manager())));
}
TEST_P(QuicConnectionTest, WindowUpdateInstigateAcks) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Send a WINDOW_UPDATE frame.
QuicWindowUpdateFrame window_update;
window_update.stream_id = 3;
window_update.byte_offset = 1234;
EXPECT_CALL(visitor_, OnWindowUpdateFrame(_));
ProcessFramePacket(QuicFrame(&window_update));
// Ensure that this has caused the ACK alarm to be set.
QuicAlarm* ack_alarm = QuicConnectionPeer::GetAckAlarm(&connection_);
EXPECT_TRUE(ack_alarm->IsSet());
}
TEST_P(QuicConnectionTest, BlockedFrameInstigateAcks) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Send a BLOCKED frame.
QuicBlockedFrame blocked;
blocked.stream_id = 3;
EXPECT_CALL(visitor_, OnBlockedFrame(_));
ProcessFramePacket(QuicFrame(&blocked));
// Ensure that this has caused the ACK alarm to be set.
QuicAlarm* ack_alarm = QuicConnectionPeer::GetAckAlarm(&connection_);
EXPECT_TRUE(ack_alarm->IsSet());
}
TEST_P(QuicConnectionTest, ReevaluateTimeUntilSendOnAck) {
// Enable pacing.
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
QuicConfig config;
connection_.SetFromConfig(config);
// Send two packets. One packet is not sufficient because if it gets acked,
// there will be no packets in flight after that and the pacer will always
// allow the next packet in that situation.
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, CanSend(_)).WillRepeatedly(Return(true));
connection_.SendStreamDataWithString(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "foo",
0, NO_FIN);
connection_.SendStreamDataWithString(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "bar",
3, NO_FIN);
connection_.OnCanWrite();
// Schedule the next packet for a few milliseconds in future.
QuicSentPacketManagerPeer::DisablePacerBursts(manager_);
QuicTime scheduled_pacing_time =
clock_.Now() + QuicTime::Delta::FromMilliseconds(5);
QuicSentPacketManagerPeer::SetNextPacedPacketTime(manager_,
scheduled_pacing_time);
// Send a packet and have it be blocked by congestion control.
EXPECT_CALL(*send_algorithm_, CanSend(_)).WillRepeatedly(Return(false));
connection_.SendStreamDataWithString(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), "baz",
6, NO_FIN);
EXPECT_FALSE(connection_.GetSendAlarm()->IsSet());
// Process an ack and the send alarm will be set to the new 5ms delay.
QuicAckFrame ack = InitAckFrame(1);
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
EXPECT_CALL(*send_algorithm_, CanSend(_)).WillRepeatedly(Return(true));
ProcessAckPacket(&ack);
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_EQ(1u, writer_->stream_frames().size());
EXPECT_TRUE(connection_.GetSendAlarm()->IsSet());
EXPECT_EQ(scheduled_pacing_time, connection_.GetSendAlarm()->deadline());
writer_->Reset();
}
TEST_P(QuicConnectionTest, SendAcksImmediately) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacket(1);
CongestionBlockWrites();
SendAckPacketToPeer();
}
TEST_P(QuicConnectionTest, SendPingImmediately) {
MockQuicConnectionDebugVisitor debug_visitor;
connection_.set_debug_visitor(&debug_visitor);
CongestionBlockWrites();
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
EXPECT_CALL(debug_visitor, OnPacketSent(_, _, _, _)).Times(1);
EXPECT_CALL(debug_visitor, OnPingSent()).Times(1);
connection_.SendControlFrame(QuicFrame(QuicPingFrame(1)));
EXPECT_FALSE(connection_.HasQueuedData());
}
TEST_P(QuicConnectionTest, SendBlockedImmediately) {
MockQuicConnectionDebugVisitor debug_visitor;
connection_.set_debug_visitor(&debug_visitor);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
EXPECT_CALL(debug_visitor, OnPacketSent(_, _, _, _)).Times(1);
EXPECT_EQ(0u, connection_.GetStats().blocked_frames_sent);
connection_.SendControlFrame(QuicFrame(new QuicBlockedFrame(1, 3)));
EXPECT_EQ(1u, connection_.GetStats().blocked_frames_sent);
EXPECT_FALSE(connection_.HasQueuedData());
}
TEST_P(QuicConnectionTest, SendingUnencryptedStreamDataFails) {
// EXPECT_QUIC_BUG tests are expensive so only run one instance of them.
if (!IsDefaultTestConfiguration()) {
return;
}
EXPECT_CALL(visitor_,
OnConnectionClosed(QUIC_ATTEMPT_TO_SEND_UNENCRYPTED_STREAM_DATA,
_, ConnectionCloseSource::FROM_SELF));
struct iovec iov;
MakeIOVector("", &iov);
EXPECT_QUIC_BUG(connection_.SaveAndSendStreamData(3, &iov, 1, 0, 0, FIN),
"Cannot send stream data without encryption.");
EXPECT_FALSE(connection_.connected());
}
TEST_P(QuicConnectionTest, SetRetransmissionAlarmForCryptoPacket) {
EXPECT_TRUE(connection_.connected());
EXPECT_FALSE(connection_.GetRetransmissionAlarm()->IsSet());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
connection_.SendCryptoStreamData();
// Verify retransmission timer is correctly set after crypto packet has been
// sent.
EXPECT_TRUE(connection_.GetRetransmissionAlarm()->IsSet());
QuicTime retransmission_time =
QuicConnectionPeer::GetSentPacketManager(&connection_)
->GetRetransmissionTime();
EXPECT_NE(retransmission_time, clock_.ApproximateNow());
EXPECT_EQ(retransmission_time,
connection_.GetRetransmissionAlarm()->deadline());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
connection_.GetRetransmissionAlarm()->Fire();
}
TEST_P(QuicConnectionTest, PathDegradingAlarmForCryptoPacket) {
EXPECT_TRUE(connection_.connected());
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
EXPECT_FALSE(connection_.IsPathDegrading());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
connection_.SendCryptoStreamData();
EXPECT_TRUE(connection_.GetPathDegradingAlarm()->IsSet());
EXPECT_FALSE(connection_.IsPathDegrading());
QuicTime::Delta delay = QuicConnectionPeer::GetSentPacketManager(&connection_)
->GetPathDegradingDelay();
EXPECT_EQ(clock_.ApproximateNow() + delay,
connection_.GetPathDegradingAlarm()->deadline());
// Fire the path degrading alarm, path degrading signal should be sent to
// the visitor.
EXPECT_CALL(visitor_, OnPathDegrading());
clock_.AdvanceTime(delay);
connection_.GetPathDegradingAlarm()->Fire();
EXPECT_TRUE(connection_.IsPathDegrading());
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
}
// Includes regression test for https://b.corp.google.com/issues/69979024.
TEST_P(QuicConnectionTest, PathDegradingAlarmForNonCryptoPackets) {
EXPECT_TRUE(connection_.connected());
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
EXPECT_FALSE(connection_.IsPathDegrading());
const char data[] = "data";
size_t data_size = strlen(data);
QuicStreamOffset offset = 0;
for (int i = 0; i < 2; ++i) {
// Send a packet. Now there's a retransmittable packet on the wire, so the
// path degrading alarm should be set.
connection_.SendStreamDataWithString(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), data,
offset, NO_FIN);
offset += data_size;
EXPECT_TRUE(connection_.GetPathDegradingAlarm()->IsSet());
// Check the deadline of the path degrading alarm.
QuicTime::Delta delay =
QuicConnectionPeer::GetSentPacketManager(&connection_)
->GetPathDegradingDelay();
EXPECT_EQ(clock_.ApproximateNow() + delay,
connection_.GetPathDegradingAlarm()->deadline());
// Send a second packet. The path degrading alarm's deadline should remain
// the same.
// Regression test for https://b.corp.google.com/issues/69979024.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
QuicTime prev_deadline = connection_.GetPathDegradingAlarm()->deadline();
connection_.SendStreamDataWithString(
GetNthClientInitiatedStreamId(1, connection_.transport_version()), data,
offset, NO_FIN);
offset += data_size;
EXPECT_TRUE(connection_.GetPathDegradingAlarm()->IsSet());
EXPECT_EQ(prev_deadline, connection_.GetPathDegradingAlarm()->deadline());
// Now receive an ACK of the first packet. This should advance the path
// degrading alarm's deadline since forward progress has been made.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
if (i == 0) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
}
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
QuicAckFrame frame = InitAckFrame(
{{QuicPacketNumber(1u + 2u * i), QuicPacketNumber(2u + 2u * i)}});
ProcessAckPacket(&frame);
EXPECT_TRUE(connection_.GetPathDegradingAlarm()->IsSet());
// Check the deadline of the path degrading alarm.
delay = QuicConnectionPeer::GetSentPacketManager(&connection_)
->GetPathDegradingDelay();
EXPECT_EQ(clock_.ApproximateNow() + delay,
connection_.GetPathDegradingAlarm()->deadline());
if (i == 0) {
// Now receive an ACK of the second packet. Since there are no more
// retransmittable packets on the wire, this should cancel the path
// degrading alarm.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
frame = InitAckFrame({{QuicPacketNumber(2), QuicPacketNumber(3)}});
ProcessAckPacket(&frame);
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
} else {
// Advance time to the path degrading alarm's deadline and simulate
// firing the alarm.
clock_.AdvanceTime(delay);
EXPECT_CALL(visitor_, OnPathDegrading());
connection_.GetPathDegradingAlarm()->Fire();
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
}
}
EXPECT_TRUE(connection_.IsPathDegrading());
}
TEST_P(QuicConnectionTest, RetransmittableOnWireSetsPingAlarm) {
const QuicTime::Delta retransmittable_on_wire_timeout =
QuicTime::Delta::FromMilliseconds(50);
connection_.set_retransmittable_on_wire_timeout(
retransmittable_on_wire_timeout);
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(visitor_, HasOpenDynamicStreams()).WillRepeatedly(Return(true));
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
EXPECT_FALSE(connection_.IsPathDegrading());
EXPECT_FALSE(connection_.GetPingAlarm()->IsSet());
const char data[] = "data";
size_t data_size = strlen(data);
QuicStreamOffset offset = 0;
// Send a packet.
connection_.SendStreamDataWithString(1, data, offset, NO_FIN);
offset += data_size;
// Now there's a retransmittable packet on the wire, so the path degrading
// alarm should be set.
// The retransmittable-on-wire alarm should not be set.
EXPECT_TRUE(connection_.GetPathDegradingAlarm()->IsSet());
QuicTime::Delta delay = QuicConnectionPeer::GetSentPacketManager(&connection_)
->GetPathDegradingDelay();
EXPECT_EQ(clock_.ApproximateNow() + delay,
connection_.GetPathDegradingAlarm()->deadline());
ASSERT_TRUE(connection_.sent_packet_manager().HasInFlightPackets());
// The ping alarm is set for the ping timeout, not the shorter
// retransmittable_on_wire_timeout.
EXPECT_TRUE(connection_.GetPingAlarm()->IsSet());
QuicTime::Delta ping_delay = QuicTime::Delta::FromSeconds(kPingTimeoutSecs);
EXPECT_EQ((clock_.ApproximateNow() + ping_delay),
connection_.GetPingAlarm()->deadline());
// Now receive an ACK of the packet.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
QuicAckFrame frame =
InitAckFrame({{QuicPacketNumber(1), QuicPacketNumber(2)}});
ProcessAckPacket(&frame);
// No more retransmittable packets on the wire, so the path degrading alarm
// should be cancelled, and the ping alarm should be set to the
// retransmittable_on_wire_timeout.
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
EXPECT_TRUE(connection_.GetPingAlarm()->IsSet());
EXPECT_EQ(clock_.ApproximateNow() + retransmittable_on_wire_timeout,
connection_.GetPingAlarm()->deadline());
// Simulate firing the ping alarm and sending a PING.
clock_.AdvanceTime(retransmittable_on_wire_timeout);
EXPECT_CALL(visitor_, SendPing()).WillOnce(Invoke([this]() {
connection_.SendControlFrame(QuicFrame(QuicPingFrame(1)));
}));
connection_.GetPingAlarm()->Fire();
// Now there's a retransmittable packet (PING) on the wire, so the path
// degrading alarm should be set.
EXPECT_TRUE(connection_.GetPathDegradingAlarm()->IsSet());
delay = QuicConnectionPeer::GetSentPacketManager(&connection_)
->GetPathDegradingDelay();
EXPECT_EQ(clock_.ApproximateNow() + delay,
connection_.GetPathDegradingAlarm()->deadline());
}
// This test verifies that the connection marks path as degrading and does not
// spin timer to detect path degrading when a new packet is sent on the
// degraded path.
TEST_P(QuicConnectionTest, NoPathDegradingAlarmIfPathIsDegrading) {
EXPECT_TRUE(connection_.connected());
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
EXPECT_FALSE(connection_.IsPathDegrading());
const char data[] = "data";
size_t data_size = strlen(data);
QuicStreamOffset offset = 0;
// Send the first packet. Now there's a retransmittable packet on the wire, so
// the path degrading alarm should be set.
connection_.SendStreamDataWithString(1, data, offset, NO_FIN);
offset += data_size;
EXPECT_TRUE(connection_.GetPathDegradingAlarm()->IsSet());
// Check the deadline of the path degrading alarm.
QuicTime::Delta delay = QuicConnectionPeer::GetSentPacketManager(&connection_)
->GetPathDegradingDelay();
EXPECT_EQ(clock_.ApproximateNow() + delay,
connection_.GetPathDegradingAlarm()->deadline());
// Send a second packet. The path degrading alarm's deadline should remain
// the same.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
QuicTime prev_deadline = connection_.GetPathDegradingAlarm()->deadline();
connection_.SendStreamDataWithString(1, data, offset, NO_FIN);
offset += data_size;
EXPECT_TRUE(connection_.GetPathDegradingAlarm()->IsSet());
EXPECT_EQ(prev_deadline, connection_.GetPathDegradingAlarm()->deadline());
// Now receive an ACK of the first packet. This should advance the path
// degrading alarm's deadline since forward progress has been made.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
QuicAckFrame frame =
InitAckFrame({{QuicPacketNumber(1u), QuicPacketNumber(2u)}});
ProcessAckPacket(&frame);
EXPECT_TRUE(connection_.GetPathDegradingAlarm()->IsSet());
// Check the deadline of the path degrading alarm.
delay = QuicConnectionPeer::GetSentPacketManager(&connection_)
->GetPathDegradingDelay();
EXPECT_EQ(clock_.ApproximateNow() + delay,
connection_.GetPathDegradingAlarm()->deadline());
// Advance time to the path degrading alarm's deadline and simulate
// firing the path degrading alarm. This path will be considered as
// degrading.
clock_.AdvanceTime(delay);
EXPECT_CALL(visitor_, OnPathDegrading()).Times(1);
connection_.GetPathDegradingAlarm()->Fire();
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
EXPECT_TRUE(connection_.IsPathDegrading());
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
// Send a third packet. The path degrading alarm is no longer set but path
// should still be marked as degrading.
connection_.SendStreamDataWithString(1, data, offset, NO_FIN);
offset += data_size;
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
EXPECT_TRUE(connection_.IsPathDegrading());
}
// This test verifies that the connection unmarks path as degrarding and spins
// the timer to detect future path degrading when forward progress is made
// after path has been marked degrading.
TEST_P(QuicConnectionTest, UnmarkPathDegradingOnForwardProgress) {
EXPECT_TRUE(connection_.connected());
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
EXPECT_FALSE(connection_.IsPathDegrading());
const char data[] = "data";
size_t data_size = strlen(data);
QuicStreamOffset offset = 0;
// Send the first packet. Now there's a retransmittable packet on the wire, so
// the path degrading alarm should be set.
connection_.SendStreamDataWithString(1, data, offset, NO_FIN);
offset += data_size;
EXPECT_TRUE(connection_.GetPathDegradingAlarm()->IsSet());
// Check the deadline of the path degrading alarm.
QuicTime::Delta delay = QuicConnectionPeer::GetSentPacketManager(&connection_)
->GetPathDegradingDelay();
EXPECT_EQ(clock_.ApproximateNow() + delay,
connection_.GetPathDegradingAlarm()->deadline());
// Send a second packet. The path degrading alarm's deadline should remain
// the same.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
QuicTime prev_deadline = connection_.GetPathDegradingAlarm()->deadline();
connection_.SendStreamDataWithString(1, data, offset, NO_FIN);
offset += data_size;
EXPECT_TRUE(connection_.GetPathDegradingAlarm()->IsSet());
EXPECT_EQ(prev_deadline, connection_.GetPathDegradingAlarm()->deadline());
// Now receive an ACK of the first packet. This should advance the path
// degrading alarm's deadline since forward progress has been made.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
QuicAckFrame frame =
InitAckFrame({{QuicPacketNumber(1u), QuicPacketNumber(2u)}});
ProcessAckPacket(&frame);
EXPECT_TRUE(connection_.GetPathDegradingAlarm()->IsSet());
// Check the deadline of the path degrading alarm.
delay = QuicConnectionPeer::GetSentPacketManager(&connection_)
->GetPathDegradingDelay();
EXPECT_EQ(clock_.ApproximateNow() + delay,
connection_.GetPathDegradingAlarm()->deadline());
// Advance time to the path degrading alarm's deadline and simulate
// firing the alarm.
clock_.AdvanceTime(delay);
EXPECT_CALL(visitor_, OnPathDegrading()).Times(1);
connection_.GetPathDegradingAlarm()->Fire();
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
EXPECT_TRUE(connection_.IsPathDegrading());
// Send a third packet. The path degrading alarm is no longer set but path
// should still be marked as degrading.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
connection_.SendStreamDataWithString(1, data, offset, NO_FIN);
offset += data_size;
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
EXPECT_TRUE(connection_.IsPathDegrading());
// Now receive an ACK of the second packet. This should unmark the path as
// degrading. And will set a timer to detect new path degrading.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
frame = InitAckFrame({{QuicPacketNumber(2), QuicPacketNumber(3)}});
ProcessAckPacket(&frame);
EXPECT_FALSE(connection_.IsPathDegrading());
EXPECT_TRUE(connection_.GetPathDegradingAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, NoPathDegradingOnServer) {
set_perspective(Perspective::IS_SERVER);
QuicPacketCreatorPeer::SetSendVersionInPacket(creator_, false);
EXPECT_FALSE(connection_.IsPathDegrading());
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
// Send data.
const char data[] = "data";
connection_.SendStreamDataWithString(1, data, 0, NO_FIN);
EXPECT_FALSE(connection_.IsPathDegrading());
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
// Ack data.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
QuicAckFrame frame =
InitAckFrame({{QuicPacketNumber(1u), QuicPacketNumber(2u)}});
ProcessAckPacket(&frame);
EXPECT_FALSE(connection_.IsPathDegrading());
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, NoPathDegradingAfterSendingAck) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessDataPacket(1);
SendAckPacketToPeer();
EXPECT_FALSE(connection_.sent_packet_manager().unacked_packets().empty());
EXPECT_FALSE(connection_.sent_packet_manager().HasInFlightPackets());
EXPECT_FALSE(connection_.IsPathDegrading());
EXPECT_FALSE(connection_.GetPathDegradingAlarm()->IsSet());
}
TEST_P(QuicConnectionTest, MultipleCallsToCloseConnection) {
// Verifies that multiple calls to CloseConnection do not
// result in multiple attempts to close the connection - it will be marked as
// disconnected after the first call.
EXPECT_CALL(visitor_, OnConnectionClosed(_, _, _)).Times(1);
connection_.CloseConnection(QUIC_NO_ERROR, "no reason",
ConnectionCloseBehavior::SILENT_CLOSE);
connection_.CloseConnection(QUIC_NO_ERROR, "no reason",
ConnectionCloseBehavior::SILENT_CLOSE);
}
TEST_P(QuicConnectionTest, ServerReceivesChloOnNonCryptoStream) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
set_perspective(Perspective::IS_SERVER);
QuicPacketCreatorPeer::SetSendVersionInPacket(creator_, false);
CryptoHandshakeMessage message;
CryptoFramer framer;
message.set_tag(kCHLO);
std::unique_ptr<QuicData> data(framer.ConstructHandshakeMessage(message));
frame1_.stream_id = 10;
frame1_.data_buffer = data->data();
frame1_.data_length = data->length();
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_MAYBE_CORRUPTED_MEMORY, _,
ConnectionCloseSource::FROM_SELF));
ForceProcessFramePacket(QuicFrame(frame1_));
}
TEST_P(QuicConnectionTest, ClientReceivesRejOnNonCryptoStream) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
CryptoHandshakeMessage message;
CryptoFramer framer;
message.set_tag(kREJ);
std::unique_ptr<QuicData> data(framer.ConstructHandshakeMessage(message));
frame1_.stream_id = 10;
frame1_.data_buffer = data->data();
frame1_.data_length = data->length();
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_MAYBE_CORRUPTED_MEMORY, _,
ConnectionCloseSource::FROM_SELF));
ForceProcessFramePacket(QuicFrame(frame1_));
}
TEST_P(QuicConnectionTest, CloseConnectionOnPacketTooLarge) {
SimulateNextPacketTooLarge();
// A connection close packet is sent
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_PACKET_WRITE_ERROR, _,
ConnectionCloseSource::FROM_SELF))
.Times(1);
connection_.SendStreamDataWithString(3, "foo", 0, NO_FIN);
}
TEST_P(QuicConnectionTest, AlwaysGetPacketTooLarge) {
// Test even we always get packet too large, we do not infinitely try to send
// close packet.
AlwaysGetPacketTooLarge();
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_PACKET_WRITE_ERROR, _,
ConnectionCloseSource::FROM_SELF))
.Times(1);
connection_.SendStreamDataWithString(3, "foo", 0, NO_FIN);
}
// Verify that if connection has no outstanding data, it notifies the send
// algorithm after the write.
TEST_P(QuicConnectionTest, SendDataAndBecomeApplicationLimited) {
EXPECT_CALL(*send_algorithm_, OnApplicationLimited(_)).Times(1);
{
InSequence seq;
EXPECT_CALL(visitor_, WillingAndAbleToWrite()).WillRepeatedly(Return(true));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
EXPECT_CALL(visitor_, WillingAndAbleToWrite())
.WillRepeatedly(Return(false));
}
connection_.SendStreamData3();
}
// Verify that the connection does not become app-limited if there is
// outstanding data to send after the write.
TEST_P(QuicConnectionTest, NotBecomeApplicationLimitedIfMoreDataAvailable) {
EXPECT_CALL(*send_algorithm_, OnApplicationLimited(_)).Times(0);
{
InSequence seq;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
EXPECT_CALL(visitor_, WillingAndAbleToWrite()).WillRepeatedly(Return(true));
}
connection_.SendStreamData3();
}
// Verify that the connection does not become app-limited after blocked write
// even if there is outstanding data to send after the write.
TEST_P(QuicConnectionTest, NotBecomeApplicationLimitedDueToWriteBlock) {
EXPECT_CALL(*send_algorithm_, OnApplicationLimited(_)).Times(0);
EXPECT_CALL(visitor_, WillingAndAbleToWrite()).WillRepeatedly(Return(true));
BlockOnNextWrite();
connection_.SendStreamData3();
// Now unblock the writer, become congestion control blocked,
// and ensure we become app-limited after writing.
writer_->SetWritable();
CongestionBlockWrites();
EXPECT_CALL(visitor_, WillingAndAbleToWrite()).WillRepeatedly(Return(false));
{
InSequence seq;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
EXPECT_CALL(*send_algorithm_, OnApplicationLimited(_)).Times(1);
}
connection_.OnCanWrite();
}
// Test the mode in which the link is filled up with probing retransmissions if
// the connection becomes application-limited.
TEST_P(QuicConnectionTest, SendDataWhenApplicationLimited) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, ShouldSendProbingPacket())
.WillRepeatedly(Return(true));
{
InSequence seq;
EXPECT_CALL(visitor_, WillingAndAbleToWrite()).WillRepeatedly(Return(true));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
EXPECT_CALL(visitor_, WillingAndAbleToWrite())
.WillRepeatedly(Return(false));
}
// Fix congestion window to be 20,000 bytes.
EXPECT_CALL(*send_algorithm_, CanSend(Ge(20000u)))
.WillRepeatedly(Return(false));
EXPECT_CALL(*send_algorithm_, CanSend(Lt(20000u)))
.WillRepeatedly(Return(true));
EXPECT_CALL(*send_algorithm_, OnApplicationLimited(_)).Times(0);
ASSERT_EQ(0u, connection_.GetStats().packets_sent);
connection_.set_fill_up_link_during_probing(true);
connection_.OnHandshakeComplete();
connection_.SendStreamData3();
// We expect a lot of packets from a 20 kbyte window.
EXPECT_GT(connection_.GetStats().packets_sent, 10u);
// Ensure that the packets are padded.
QuicByteCount average_packet_size =
connection_.GetStats().bytes_sent / connection_.GetStats().packets_sent;
EXPECT_GT(average_packet_size, 1000u);
// Acknowledge all packets sent, except for the last one.
QuicAckFrame ack = InitAckFrame(
connection_.sent_packet_manager().GetLargestSentPacket() - 1);
EXPECT_CALL(*loss_algorithm_, DetectLosses(_, _, _, _, _, _));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
// Ensure that since we no longer have retransmittable bytes in flight, this
// will not cause any responses to be sent.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(0);
EXPECT_CALL(*send_algorithm_, OnApplicationLimited(_)).Times(1);
ProcessAckPacket(&ack);
}
TEST_P(QuicConnectionTest, DonotForceSendingAckOnPacketTooLarge) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Send an ack by simulating delayed ack alarm firing.
ProcessPacket(1);
QuicAlarm* ack_alarm = QuicConnectionPeer::GetAckAlarm(&connection_);
EXPECT_TRUE(ack_alarm->IsSet());
connection_.GetAckAlarm()->Fire();
// Simulate data packet causes write error.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_PACKET_WRITE_ERROR, _, _));
SimulateNextPacketTooLarge();
connection_.SendStreamDataWithString(3, "foo", 0, NO_FIN);
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_FALSE(writer_->connection_close_frames().empty());
// Ack frame is not bundled in connection close packet.
EXPECT_TRUE(writer_->ack_frames().empty());
}
TEST_P(QuicConnectionTest, CloseConnectionForStatelessReject) {
QuicString error_details("stateless reject");
EXPECT_CALL(visitor_, OnConnectionClosed(
QUIC_CRYPTO_HANDSHAKE_STATELESS_REJECT,
error_details, ConnectionCloseSource::FROM_PEER));
connection_.set_perspective(Perspective::IS_CLIENT);
connection_.CloseConnection(QUIC_CRYPTO_HANDSHAKE_STATELESS_REJECT,
error_details,
ConnectionCloseBehavior::SILENT_CLOSE);
}
// Regression test for b/63620844.
TEST_P(QuicConnectionTest, FailedToWriteHandshakePacket) {
SimulateNextPacketTooLarge();
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_PACKET_WRITE_ERROR, _,
ConnectionCloseSource::FROM_SELF))
.Times(1);
connection_.SendCryptoStreamData();
}
TEST_P(QuicConnectionTest, MaxPacingRate) {
EXPECT_EQ(0, connection_.MaxPacingRate().ToBytesPerSecond());
connection_.SetMaxPacingRate(QuicBandwidth::FromBytesPerSecond(100));
EXPECT_EQ(100, connection_.MaxPacingRate().ToBytesPerSecond());
}
TEST_P(QuicConnectionTest, ClientAlwaysSendConnectionId) {
EXPECT_EQ(Perspective::IS_CLIENT, connection_.perspective());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
connection_.SendStreamDataWithString(3, "foo", 0, NO_FIN);
EXPECT_EQ(PACKET_8BYTE_CONNECTION_ID,
writer_->last_packet_header().destination_connection_id_length);
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
QuicConfig config;
QuicConfigPeer::SetReceivedBytesForConnectionId(&config, 0);
connection_.SetFromConfig(config);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
connection_.SendStreamDataWithString(3, "bar", 3, NO_FIN);
// Verify connection id is still sent in the packet.
EXPECT_EQ(PACKET_8BYTE_CONNECTION_ID,
writer_->last_packet_header().destination_connection_id_length);
}
TEST_P(QuicConnectionTest, SendProbingRetransmissions) {
MockQuicConnectionDebugVisitor debug_visitor;
connection_.set_debug_visitor(&debug_visitor);
const QuicStreamId stream_id = 2;
QuicPacketNumber last_packet;
SendStreamDataToPeer(stream_id, "foo", 0, NO_FIN, &last_packet);
SendStreamDataToPeer(stream_id, "bar", 3, NO_FIN, &last_packet);
SendStreamDataToPeer(stream_id, "test", 6, NO_FIN, &last_packet);
const QuicByteCount old_bytes_in_flight =
connection_.sent_packet_manager().GetBytesInFlight();
// Allow 9 probing retransmissions to be sent.
{
InSequence seq;
EXPECT_CALL(*send_algorithm_, CanSend(_))
.Times(9 * 2)
.WillRepeatedly(Return(true));
EXPECT_CALL(*send_algorithm_, CanSend(_)).WillOnce(Return(false));
}
// Expect them retransmitted in cyclic order (foo, bar, test, foo, bar...).
QuicPacketCount sent_count = 0;
EXPECT_CALL(debug_visitor, OnPacketSent(_, _, _, _))
.WillRepeatedly(Invoke([this, &sent_count](const SerializedPacket&,
QuicPacketNumber,
TransmissionType, QuicTime) {
ASSERT_EQ(1u, writer_->stream_frames().size());
// Identify the frames by stream offset (0, 3, 6, 0, 3...).
EXPECT_EQ(3 * (sent_count % 3), writer_->stream_frames()[0]->offset);
sent_count++;
}));
EXPECT_CALL(*send_algorithm_, ShouldSendProbingPacket())
.WillRepeatedly(Return(true));
connection_.SendProbingRetransmissions();
// Ensure that the in-flight has increased.
const QuicByteCount new_bytes_in_flight =
connection_.sent_packet_manager().GetBytesInFlight();
EXPECT_GT(new_bytes_in_flight, old_bytes_in_flight);
}
// Ensure that SendProbingRetransmissions() does not retransmit anything when
// there are no outstanding packets.
TEST_P(QuicConnectionTest,
SendProbingRetransmissionsFailsWhenNothingToRetransmit) {
ASSERT_TRUE(connection_.sent_packet_manager().unacked_packets().empty());
MockQuicConnectionDebugVisitor debug_visitor;
connection_.set_debug_visitor(&debug_visitor);
EXPECT_CALL(debug_visitor, OnPacketSent(_, _, _, _)).Times(0);
EXPECT_CALL(*send_algorithm_, ShouldSendProbingPacket())
.WillRepeatedly(Return(true));
connection_.SendProbingRetransmissions();
}
TEST_P(QuicConnectionTest, PingAfterLastRetransmittablePacketAcked) {
const QuicTime::Delta retransmittable_on_wire_timeout =
QuicTime::Delta::FromMilliseconds(50);
connection_.set_retransmittable_on_wire_timeout(
retransmittable_on_wire_timeout);
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(visitor_, HasOpenDynamicStreams()).WillRepeatedly(Return(true));
const char data[] = "data";
size_t data_size = strlen(data);
QuicStreamOffset offset = 0;
// Advance 5ms, send a retransmittable packet to the peer.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_FALSE(connection_.GetPingAlarm()->IsSet());
connection_.SendStreamDataWithString(1, data, offset, NO_FIN);
offset += data_size;
EXPECT_TRUE(connection_.sent_packet_manager().HasInFlightPackets());
// The ping alarm is set for the ping timeout, not the shorter
// retransmittable_on_wire_timeout.
EXPECT_TRUE(connection_.GetPingAlarm()->IsSet());
QuicTime::Delta ping_delay = QuicTime::Delta::FromSeconds(kPingTimeoutSecs);
EXPECT_EQ((clock_.ApproximateNow() + ping_delay),
connection_.GetPingAlarm()->deadline());
// Advance 5ms, send a second retransmittable packet to the peer.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_TRUE(connection_.GetPingAlarm()->IsSet());
connection_.SendStreamDataWithString(1, data, offset, NO_FIN);
offset += data_size;
EXPECT_TRUE(connection_.GetPingAlarm()->IsSet());
// Now receive an ACK of the first packet. This should not set the
// retransmittable-on-wire alarm since packet 2 is still on the wire.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
QuicAckFrame frame =
InitAckFrame({{QuicPacketNumber(1), QuicPacketNumber(2)}});
ProcessAckPacket(&frame);
EXPECT_TRUE(connection_.sent_packet_manager().HasInFlightPackets());
// The ping alarm is set for the ping timeout, not the shorter
// retransmittable_on_wire_timeout.
EXPECT_TRUE(connection_.GetPingAlarm()->IsSet());
// The ping alarm has a 1 second granularity, and the clock has been advanced
// 10ms since it was originally set.
EXPECT_EQ((clock_.ApproximateNow() + ping_delay -
QuicTime::Delta::FromMilliseconds(10)),
connection_.GetPingAlarm()->deadline());
// Now receive an ACK of the second packet. This should set the
// retransmittable-on-wire alarm now that no retransmittable packets are on
// the wire.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
frame = InitAckFrame({{QuicPacketNumber(2), QuicPacketNumber(3)}});
ProcessAckPacket(&frame);
EXPECT_TRUE(connection_.GetPingAlarm()->IsSet());
EXPECT_EQ(clock_.ApproximateNow() + retransmittable_on_wire_timeout,
connection_.GetPingAlarm()->deadline());
// Now receive a duplicate ACK of the second packet. This should not update
// the ping alarm.
QuicTime prev_deadline = connection_.GetPingAlarm()->deadline();
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
frame = InitAckFrame({{QuicPacketNumber(2), QuicPacketNumber(3)}});
ProcessAckPacket(&frame);
EXPECT_TRUE(connection_.GetPingAlarm()->IsSet());
EXPECT_EQ(prev_deadline, connection_.GetPingAlarm()->deadline());
// Now receive a non-ACK packet. This should not update the ping alarm.
prev_deadline = connection_.GetPingAlarm()->deadline();
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
ProcessPacket(4);
EXPECT_TRUE(connection_.GetPingAlarm()->IsSet());
EXPECT_EQ(prev_deadline, connection_.GetPingAlarm()->deadline());
// Simulate the alarm firing and check that a PING is sent.
EXPECT_CALL(visitor_, SendPing()).WillOnce(Invoke([this]() {
connection_.SendControlFrame(QuicFrame(QuicPingFrame(1)));
}));
connection_.GetPingAlarm()->Fire();
if (GetParam().no_stop_waiting) {
EXPECT_EQ(2u, writer_->frame_count());
} else {
EXPECT_EQ(3u, writer_->frame_count());
}
ASSERT_EQ(1u, writer_->ping_frames().size());
}
TEST_P(QuicConnectionTest, NoPingIfRetransmittablePacketSent) {
const QuicTime::Delta retransmittable_on_wire_timeout =
QuicTime::Delta::FromMilliseconds(50);
connection_.set_retransmittable_on_wire_timeout(
retransmittable_on_wire_timeout);
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(visitor_, HasOpenDynamicStreams()).WillRepeatedly(Return(true));
const char data[] = "data";
size_t data_size = strlen(data);
QuicStreamOffset offset = 0;
// Advance 5ms, send a retransmittable packet to the peer.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_FALSE(connection_.GetPingAlarm()->IsSet());
connection_.SendStreamDataWithString(1, data, offset, NO_FIN);
offset += data_size;
EXPECT_TRUE(connection_.sent_packet_manager().HasInFlightPackets());
// The ping alarm is set for the ping timeout, not the shorter
// retransmittable_on_wire_timeout.
EXPECT_TRUE(connection_.GetPingAlarm()->IsSet());
QuicTime::Delta ping_delay = QuicTime::Delta::FromSeconds(kPingTimeoutSecs);
EXPECT_EQ((clock_.ApproximateNow() + ping_delay),
connection_.GetPingAlarm()->deadline());
// Now receive an ACK of the first packet. This should set the
// retransmittable-on-wire alarm now that no retransmittable packets are on
// the wire.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
QuicAckFrame frame =
InitAckFrame({{QuicPacketNumber(1), QuicPacketNumber(2)}});
ProcessAckPacket(&frame);
EXPECT_TRUE(connection_.GetPingAlarm()->IsSet());
EXPECT_EQ(clock_.ApproximateNow() + retransmittable_on_wire_timeout,
connection_.GetPingAlarm()->deadline());
// Before the alarm fires, send another retransmittable packet. This should
// cancel the retransmittable-on-wire alarm since now there's a
// retransmittable packet on the wire.
connection_.SendStreamDataWithString(1, data, offset, NO_FIN);
offset += data_size;
EXPECT_TRUE(connection_.GetPingAlarm()->IsSet());
// Now receive an ACK of the second packet. This should set the
// retransmittable-on-wire alarm now that no retransmittable packets are on
// the wire.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
frame = InitAckFrame({{QuicPacketNumber(2), QuicPacketNumber(3)}});
ProcessAckPacket(&frame);
EXPECT_TRUE(connection_.GetPingAlarm()->IsSet());
EXPECT_EQ(clock_.ApproximateNow() + retransmittable_on_wire_timeout,
connection_.GetPingAlarm()->deadline());
// Simulate the alarm firing and check that a PING is sent.
writer_->Reset();
EXPECT_CALL(visitor_, SendPing()).WillOnce(Invoke([this]() {
connection_.SendControlFrame(QuicFrame(QuicPingFrame(1)));
}));
connection_.GetPingAlarm()->Fire();
if (GetParam().no_stop_waiting) {
EXPECT_EQ(2u, writer_->frame_count());
} else {
EXPECT_EQ(3u, writer_->frame_count());
}
ASSERT_EQ(1u, writer_->ping_frames().size());
}
TEST_P(QuicConnectionTest, OnForwardProgressConfirmed) {
EXPECT_CALL(visitor_, OnForwardProgressConfirmed()).Times(Exactly(0));
EXPECT_TRUE(connection_.connected());
const char data[] = "data";
size_t data_size = strlen(data);
QuicStreamOffset offset = 0;
// Send two packets.
connection_.SendStreamDataWithString(1, data, offset, NO_FIN);
offset += data_size;
connection_.SendStreamDataWithString(1, data, offset, NO_FIN);
offset += data_size;
// Ack packet 1. This increases the largest_acked to 1, so
// OnForwardProgressConfirmed() should be called
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
EXPECT_CALL(visitor_, OnForwardProgressConfirmed());
QuicAckFrame frame =
InitAckFrame({{QuicPacketNumber(1), QuicPacketNumber(2)}});
ProcessAckPacket(&frame);
// Ack packet 1 again. largest_acked remains at 1, so
// OnForwardProgressConfirmed() should not be called.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
frame = InitAckFrame({{QuicPacketNumber(1), QuicPacketNumber(2)}});
ProcessAckPacket(&frame);
// Ack packet 2. This increases the largest_acked to 2, so
// OnForwardProgressConfirmed() should be called.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _, _));
EXPECT_CALL(visitor_, OnForwardProgressConfirmed());
frame = InitAckFrame({{QuicPacketNumber(2), QuicPacketNumber(3)}});
ProcessAckPacket(&frame);
}
TEST_P(QuicConnectionTest, ValidStatelessResetToken) {
const QuicUint128 kTestToken = 1010101;
const QuicUint128 kWrongTestToken = 1010100;
QuicConfig config;
// No token has been received.
EXPECT_FALSE(connection_.IsValidStatelessResetToken(kTestToken));
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _)).Times(2);
// Token is different from received token.
QuicConfigPeer::SetReceivedStatelessResetToken(&config, kTestToken);
connection_.SetFromConfig(config);
EXPECT_FALSE(connection_.IsValidStatelessResetToken(kWrongTestToken));
QuicConfigPeer::SetReceivedStatelessResetToken(&config, kTestToken);
connection_.SetFromConfig(config);
EXPECT_TRUE(connection_.IsValidStatelessResetToken(kTestToken));
}
TEST_P(QuicConnectionTest, WriteBlockedWithInvalidAck) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_INVALID_ACK_DATA, _, _));
BlockOnNextWrite();
connection_.SendStreamDataWithString(5, "foo", 0, FIN);
// This causes connection to be closed because packet 1 has not been sent yet.
QuicAckFrame frame = InitAckFrame(1);
ProcessAckPacket(1, &frame);
}
TEST_P(QuicConnectionTest, SendMessage) {
if (connection_.transport_version() <= QUIC_VERSION_44) {
return;
}
QuicString message(connection_.GetLargestMessagePayload() * 2, 'a');
QuicStringPiece message_data(message);
{
QuicConnection::ScopedPacketFlusher flusher(&connection_,
QuicConnection::SEND_ACK);
connection_.SendStreamData3();
// Send a message which cannot fit into current open packet, and 2 packets
// get sent, one contains stream frame, and the other only contains the
// message frame.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(2);
EXPECT_EQ(MESSAGE_STATUS_SUCCESS,
connection_.SendMessage(
1, QuicStringPiece(message_data.data(),
connection_.GetLargestMessagePayload())));
}
// Fail to send a message if connection is congestion control blocked.
EXPECT_CALL(*send_algorithm_, CanSend(_)).WillOnce(Return(false));
EXPECT_EQ(MESSAGE_STATUS_BLOCKED, connection_.SendMessage(2, "message"));
// Always fail to send a message which cannot fit into one packet.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(0);
EXPECT_EQ(
MESSAGE_STATUS_TOO_LARGE,
connection_.SendMessage(
3, QuicStringPiece(message_data.data(),
connection_.GetLargestMessagePayload() + 1)));
}
// Test to check that the path challenge/path response logic works
// correctly. This test is only for version-99
TEST_P(QuicConnectionTest, PathChallengeResponse) {
if (connection_.version().transport_version != QUIC_VERSION_99) {
return;
}
// First check if we can probe from server to client and back
set_perspective(Perspective::IS_SERVER);
QuicPacketCreatorPeer::SetSendVersionInPacket(creator_, false);
// Create and send the probe request (PATH_CHALLENGE frame).
// SendConnectivityProbingPacket ends up calling
// TestPacketWriter::WritePacket() which in turns receives and parses the
// packet by calling framer_.ProcessPacket() -- which in turn calls
// SimpleQuicFramer::OnPathChallengeFrame(). SimpleQuicFramer saves
// the packet in writer_->path_challenge_frames()
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
connection_.SendConnectivityProbingPacket(writer_.get(),
connection_.peer_address());
// Save the random contents of the challenge for later comparison to the
// response.
QuicPathFrameBuffer challenge_data =
writer_->path_challenge_frames().front().data_buffer;
// Normally, QuicConnection::OnPathChallengeFrame and OnPaddingFrame would be
// called and it will perform actions to ensure that the rest of the protocol
// is performed (specifically, call UpdatePacketContent to say that this is a
// path challenge so that when QuicConnection::OnPacketComplete is called
// (again, out of the framer), the response is generated). Simulate those
// calls so that the right internal state is set up for generating
// the response.
EXPECT_TRUE(connection_.OnPathChallengeFrame(
writer_->path_challenge_frames().front()));
EXPECT_TRUE(connection_.OnPaddingFrame(writer_->padding_frames().front()));
// Cause the response to be created and sent. Result is that the response
// should be stashed in writer's path_response_frames.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
connection_.SendConnectivityProbingResponsePacket(connection_.peer_address());
// The final check is to ensure that the random data in the response matches
// the random data from the challenge.
EXPECT_EQ(0, memcmp(&challenge_data,
&(writer_->path_response_frames().front().data_buffer),
sizeof(challenge_data)));
}
// Regression test for b/110259444
TEST_P(QuicConnectionTest, DoNotScheduleSpuriousAckAlarm) {
SetQuicReloadableFlag(quic_fix_spurious_ack_alarm, true);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(visitor_, OnWriteBlocked()).Times(AtLeast(1));
writer_->SetWriteBlocked();
ProcessPacket(1);
QuicAlarm* ack_alarm = QuicConnectionPeer::GetAckAlarm(&connection_);
// Verify ack alarm is set.
EXPECT_TRUE(ack_alarm->IsSet());
// Fire the ack alarm, verify no packet is sent because the writer is blocked.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(0);
connection_.GetAckAlarm()->Fire();
writer_->SetWritable();
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
ProcessPacket(2);
// Verify ack alarm is not set.
EXPECT_FALSE(ack_alarm->IsSet());
}
TEST_P(QuicConnectionTest, DisablePacingOffloadConnectionOptions) {
EXPECT_FALSE(QuicConnectionPeer::SupportsReleaseTime(&connection_));
writer_->set_supports_release_time(true);
QuicConfig config;
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
connection_.SetFromConfig(config);
EXPECT_TRUE(QuicConnectionPeer::SupportsReleaseTime(&connection_));
QuicTagVector connection_options;
connection_options.push_back(kNPCO);
config.SetConnectionOptionsToSend(connection_options);
EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
connection_.SetFromConfig(config);
// Verify pacing offload is disabled.
EXPECT_FALSE(QuicConnectionPeer::SupportsReleaseTime(&connection_));
}
// Regression test for b/110259444
// Get a path response without having issued a path challenge...
TEST_P(QuicConnectionTest, OrphanPathResponse) {
QuicPathFrameBuffer data = {{0, 1, 2, 3, 4, 5, 6, 7}};
QuicPathResponseFrame frame(99, data);
EXPECT_TRUE(connection_.OnPathResponseFrame(frame));
// If PATH_RESPONSE was accepted (payload matches the payload saved
// in QuicConnection::transmitted_connectivity_probe_payload_) then
// current_packet_content_ would be set to FIRST_FRAME_IS_PING.
// Since this PATH_RESPONSE does not match, current_packet_content_
// must not be FIRST_FRAME_IS_PING.
EXPECT_NE(QuicConnection::FIRST_FRAME_IS_PING,
QuicConnectionPeer::GetCurrentPacketContent(&connection_));
}
// Regression test for b/120791670
TEST_P(QuicConnectionTest, StopProcessingGQuicPacketInIetfQuicConnection) {
// This test mimics a problematic scenario where an IETF QUIC connection
// receives a Google QUIC packet and continue processing it using Google QUIC
// wire format.
if (version().transport_version <= QUIC_VERSION_43) {
return;
}
set_perspective(Perspective::IS_SERVER);
QuicStreamFrame stream_frame(
QuicUtils::GetCryptoStreamId(connection_.transport_version()), false, 0u,
QuicStringPiece());
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(1);
ProcessFramePacketWithAddresses(QuicFrame(stream_frame), kSelfAddress,
kPeerAddress);
// Let connection process a Google QUIC packet.
peer_framer_.set_version_for_tests(
ParsedQuicVersion(PROTOCOL_QUIC_CRYPTO, QUIC_VERSION_43));
std::unique_ptr<QuicPacket> packet(ConstructDataPacket(2, !kHasStopWaiting));
char buffer[kMaxPacketSize];
size_t encrypted_length = peer_framer_.EncryptPayload(
ENCRYPTION_NONE, QuicPacketNumber(2), *packet, buffer, kMaxPacketSize);
// Make sure no stream frame is processed.
EXPECT_CALL(visitor_, OnStreamFrame(_)).Times(0);
connection_.ProcessUdpPacket(
kSelfAddress, kPeerAddress,
QuicReceivedPacket(buffer, encrypted_length, clock_.Now(), false));
EXPECT_EQ(2u, connection_.GetStats().packets_received);
EXPECT_EQ(1u, connection_.GetStats().packets_processed);
}
TEST_P(QuicConnectionTest, AcceptPacketNumberZero) {
if (!GetQuicRestartFlag(quic_uint64max_uninitialized_pn) ||
version().transport_version != QUIC_VERSION_99) {
return;
}
// Set first_sending_packet_number to be 0 to allow successfully processing
// acks which ack packet number 0.
QuicFramerPeer::SetFirstSendingPacketNumber(writer_->framer()->framer(), 0);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(0);
EXPECT_EQ(QuicPacketNumber(0), LargestAcked(*outgoing_ack()));
EXPECT_EQ(1u, outgoing_ack()->packets.NumIntervals());
ProcessPacket(1);
EXPECT_EQ(QuicPacketNumber(1), LargestAcked(*outgoing_ack()));
EXPECT_EQ(1u, outgoing_ack()->packets.NumIntervals());
ProcessPacket(2);
EXPECT_EQ(QuicPacketNumber(2), LargestAcked(*outgoing_ack()));
EXPECT_EQ(1u, outgoing_ack()->packets.NumIntervals());
}
} // namespace
} // namespace test
} // namespace quic