// 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/quic/quic_connection.h"
#include "base/basictypes.h"
#include "base/bind.h"
#include "base/stl_util.h"
#include "net/base/net_errors.h"
#include "net/quic/congestion_control/receive_algorithm_interface.h"
#include "net/quic/congestion_control/send_algorithm_interface.h"
#include "net/quic/crypto/null_encrypter.h"
#include "net/quic/crypto/quic_decrypter.h"
#include "net/quic/crypto/quic_encrypter.h"
#include "net/quic/quic_protocol.h"
#include "net/quic/quic_sent_packet_manager.h"
#include "net/quic/quic_utils.h"
#include "net/quic/test_tools/mock_clock.h"
#include "net/quic/test_tools/mock_random.h"
#include "net/quic/test_tools/quic_connection_peer.h"
#include "net/quic/test_tools/quic_framer_peer.h"
#include "net/quic/test_tools/quic_packet_creator_peer.h"
#include "net/quic/test_tools/quic_test_utils.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
using base::StringPiece;
using std::map;
using std::vector;
using testing::_;
using testing::AnyNumber;
using testing::ContainerEq;
using testing::DoAll;
using testing::InSequence;
using testing::InvokeWithoutArgs;
using testing::Ref;
using testing::Return;
using testing::SaveArg;
using testing::StrictMock;
namespace net {
namespace test {
namespace {
const char data1[] = "foo";
const char data2[] = "bar";
const bool kFin = true;
const bool kEntropyFlag = true;
const QuicPacketEntropyHash kTestEntropyHash = 76;
const int kDefaultRetransmissionTimeMs = 500;
const int kMinRetransmissionTimeMs = 200;
// Used by TestConnection::SendStreamData3.
const QuicStreamId kStreamId3 = 3;
// Used by TestConnection::SendStreamData5.
const QuicStreamId kStreamId5 = 5;
class TestReceiveAlgorithm : public ReceiveAlgorithmInterface {
public:
explicit TestReceiveAlgorithm(QuicCongestionFeedbackFrame* feedback)
: feedback_(feedback) {
}
bool GenerateCongestionFeedback(
QuicCongestionFeedbackFrame* congestion_feedback) {
if (feedback_ == NULL) {
return false;
}
*congestion_feedback = *feedback_;
return true;
}
MOCK_METHOD4(RecordIncomingPacket,
void(QuicByteCount, QuicPacketSequenceNumber, QuicTime, bool));
private:
QuicCongestionFeedbackFrame* feedback_;
DISALLOW_COPY_AND_ASSIGN(TestReceiveAlgorithm);
};
// TaggingEncrypter appends kTagSize bytes of |tag| to the end of each message.
class TaggingEncrypter : public QuicEncrypter {
public:
explicit TaggingEncrypter(uint8 tag)
: tag_(tag) {
}
virtual ~TaggingEncrypter() {}
// QuicEncrypter interface.
virtual bool SetKey(StringPiece key) OVERRIDE { return true; }
virtual bool SetNoncePrefix(StringPiece nonce_prefix) OVERRIDE {
return true;
}
virtual bool Encrypt(StringPiece nonce,
StringPiece associated_data,
StringPiece plaintext,
unsigned char* output) OVERRIDE {
memcpy(output, plaintext.data(), plaintext.size());
output += plaintext.size();
memset(output, tag_, kTagSize);
return true;
}
virtual QuicData* EncryptPacket(QuicPacketSequenceNumber sequence_number,
StringPiece associated_data,
StringPiece plaintext) OVERRIDE {
const size_t len = plaintext.size() + kTagSize;
uint8* buffer = new uint8[len];
Encrypt(StringPiece(), associated_data, plaintext, buffer);
return new QuicData(reinterpret_cast<char*>(buffer), len, true);
}
virtual size_t GetKeySize() const OVERRIDE { return 0; }
virtual size_t GetNoncePrefixSize() const OVERRIDE { return 0; }
virtual size_t GetMaxPlaintextSize(size_t ciphertext_size) const OVERRIDE {
return ciphertext_size - kTagSize;
}
virtual size_t GetCiphertextSize(size_t plaintext_size) const OVERRIDE {
return plaintext_size + kTagSize;
}
virtual StringPiece GetKey() const OVERRIDE {
return StringPiece();
}
virtual StringPiece GetNoncePrefix() const OVERRIDE {
return StringPiece();
}
private:
enum {
kTagSize = 12,
};
const uint8 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:
virtual ~TaggingDecrypter() {}
// QuicDecrypter interface
virtual bool SetKey(StringPiece key) OVERRIDE { return true; }
virtual bool SetNoncePrefix(StringPiece nonce_prefix) OVERRIDE {
return true;
}
virtual bool Decrypt(StringPiece nonce,
StringPiece associated_data,
StringPiece ciphertext,
unsigned char* output,
size_t* 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;
}
virtual QuicData* DecryptPacket(QuicPacketSequenceNumber sequence_number,
StringPiece associated_data,
StringPiece ciphertext) OVERRIDE {
if (ciphertext.size() < kTagSize) {
return NULL;
}
if (!CheckTag(ciphertext, GetTag(ciphertext))) {
return NULL;
}
const size_t len = ciphertext.size() - kTagSize;
uint8* buf = new uint8[len];
memcpy(buf, ciphertext.data(), len);
return new QuicData(reinterpret_cast<char*>(buf), len,
true /* owns buffer */);
}
virtual StringPiece GetKey() const OVERRIDE { return StringPiece(); }
virtual StringPiece GetNoncePrefix() const OVERRIDE { return StringPiece(); }
protected:
virtual uint8 GetTag(StringPiece ciphertext) {
return ciphertext.data()[ciphertext.size()-1];
}
private:
enum {
kTagSize = 12,
};
bool CheckTag(StringPiece ciphertext, uint8 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 tag) : tag_(tag) {}
virtual ~StrictTaggingDecrypter() {}
// TaggingQuicDecrypter
virtual uint8 GetTag(StringPiece ciphertext) OVERRIDE {
return tag_;
}
private:
const uint8 tag_;
};
class TestConnectionHelper : public QuicConnectionHelperInterface {
public:
class TestAlarm : public QuicAlarm {
public:
explicit TestAlarm(QuicAlarm::Delegate* delegate)
: QuicAlarm(delegate) {
}
virtual void SetImpl() OVERRIDE {}
virtual void CancelImpl() OVERRIDE {}
using QuicAlarm::Fire;
};
TestConnectionHelper(MockClock* clock, MockRandom* random_generator)
: clock_(clock),
random_generator_(random_generator) {
clock_->AdvanceTime(QuicTime::Delta::FromSeconds(1));
}
// QuicConnectionHelperInterface
virtual const QuicClock* GetClock() const OVERRIDE {
return clock_;
}
virtual QuicRandom* GetRandomGenerator() OVERRIDE {
return random_generator_;
}
virtual QuicAlarm* CreateAlarm(QuicAlarm::Delegate* delegate) OVERRIDE {
return new TestAlarm(delegate);
}
private:
MockClock* clock_;
MockRandom* random_generator_;
DISALLOW_COPY_AND_ASSIGN(TestConnectionHelper);
};
class TestPacketWriter : public QuicPacketWriter {
public:
TestPacketWriter()
: last_packet_size_(0),
blocked_(false),
is_write_blocked_data_buffered_(false),
is_server_(true),
final_bytes_of_last_packet_(0),
final_bytes_of_previous_packet_(0),
use_tagging_decrypter_(false),
packets_write_attempts_(0) {
}
// QuicPacketWriter
virtual WriteResult WritePacket(
const char* buffer, size_t buf_len,
const IPAddressNumber& self_address,
const IPEndPoint& peer_address,
QuicBlockedWriterInterface* blocked_writer) 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_));
}
QuicFramer framer(QuicSupportedVersions(), QuicTime::Zero(), !is_server_);
if (use_tagging_decrypter_) {
framer.SetDecrypter(new TaggingDecrypter);
}
visitor_.Reset();
framer.set_visitor(&visitor_);
EXPECT_TRUE(framer.ProcessPacket(packet));
if (blocked_) {
return WriteResult(WRITE_STATUS_BLOCKED, -1);
}
last_packet_size_ = packet.length();
return WriteResult(WRITE_STATUS_OK, last_packet_size_);
}
virtual bool IsWriteBlockedDataBuffered() const OVERRIDE {
return is_write_blocked_data_buffered_;
}
// Resets the visitor's state by clearing out the headers and frames.
void Reset() {
visitor_.Reset();
}
QuicPacketHeader* header() { return visitor_.header(); }
size_t frame_count() const { return visitor_.frame_count(); }
QuicAckFrame* ack() { return visitor_.ack(); }
QuicCongestionFeedbackFrame* feedback() { return visitor_.feedback(); }
QuicConnectionCloseFrame* close() { return visitor_.close(); }
const vector<QuicStreamFrame>* stream_frames() const {
return visitor_.stream_frames();
}
size_t last_packet_size() {
return last_packet_size_;
}
QuicVersionNegotiationPacket* version_negotiation_packet() {
return visitor_.version_negotiation_packet();
}
void set_blocked(bool blocked) { blocked_ = blocked; }
void set_is_write_blocked_data_buffered(bool buffered) {
is_write_blocked_data_buffered_ = buffered;
}
void set_is_server(bool is_server) { is_server_ = is_server; }
// final_bytes_of_last_packet_ returns the last four bytes of the previous
// packet as a little-endian, uint32. This is intended to be used with a
// TaggingEncrypter so that tests can determine which encrypter was used for
// a given packet.
uint32 final_bytes_of_last_packet() { return final_bytes_of_last_packet_; }
// Returns the final bytes of the second to last packet.
uint32 final_bytes_of_previous_packet() {
return final_bytes_of_previous_packet_;
}
void use_tagging_decrypter() {
use_tagging_decrypter_ = true;
}
uint32 packets_write_attempts() { return packets_write_attempts_; }
private:
FramerVisitorCapturingFrames visitor_;
size_t last_packet_size_;
bool blocked_;
bool is_write_blocked_data_buffered_;
bool is_server_;
uint32 final_bytes_of_last_packet_;
uint32 final_bytes_of_previous_packet_;
bool use_tagging_decrypter_;
uint32 packets_write_attempts_;
DISALLOW_COPY_AND_ASSIGN(TestPacketWriter);
};
class TestConnection : public QuicConnection {
public:
TestConnection(QuicGuid guid,
IPEndPoint address,
TestConnectionHelper* helper,
TestPacketWriter* writer,
bool is_server)
: QuicConnection(guid, address, helper, writer, is_server,
QuicSupportedVersions()),
helper_(helper),
writer_(writer) {
writer_->set_is_server(is_server);
}
void SendAck() {
QuicConnectionPeer::SendAck(this);
}
void SetReceiveAlgorithm(TestReceiveAlgorithm* receive_algorithm) {
QuicConnectionPeer::SetReceiveAlgorithm(this, receive_algorithm);
}
void SetSendAlgorithm(SendAlgorithmInterface* send_algorithm) {
QuicConnectionPeer::SetSendAlgorithm(this, send_algorithm);
}
void SendPacket(EncryptionLevel level,
QuicPacketSequenceNumber sequence_number,
QuicPacket* packet,
QuicPacketEntropyHash entropy_hash,
HasRetransmittableData retransmittable) {
RetransmittableFrames* retransmittable_frames =
retransmittable == HAS_RETRANSMITTABLE_DATA ?
new RetransmittableFrames() : NULL;
OnSerializedPacket(
SerializedPacket(sequence_number, PACKET_6BYTE_SEQUENCE_NUMBER,
packet, entropy_hash, retransmittable_frames));
}
QuicConsumedData SendStreamDataWithString(
QuicStreamId id,
StringPiece data,
QuicStreamOffset offset,
bool fin,
QuicAckNotifier::DelegateInterface* delegate) {
IOVector data_iov;
if (!data.empty()) {
data_iov.Append(const_cast<char*>(data.data()), data.size());
}
return QuicConnection::SendStreamData(id, data_iov, offset, fin, delegate);
}
QuicConsumedData SendStreamData3() {
return SendStreamDataWithString(kStreamId3, "food", 0, !kFin, NULL);
}
QuicConsumedData SendStreamData5() {
return SendStreamDataWithString(kStreamId5, "food2", 0, !kFin, NULL);
}
// 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() {
this->Flush();
QuicConsumedData consumed =
SendStreamDataWithString(kCryptoStreamId, "chlo", 0, !kFin, NULL);
this->Flush();
return consumed;
}
bool is_server() {
return QuicConnectionPeer::IsServer(this);
}
void set_version(QuicVersion version) {
framer_.set_version(version);
}
void set_is_server(bool is_server) {
writer_->set_is_server(is_server);
QuicPacketCreatorPeer::SetIsServer(
QuicConnectionPeer::GetPacketCreator(this), is_server);
QuicConnectionPeer::SetIsServer(this, is_server);
}
TestConnectionHelper::TestAlarm* GetAckAlarm() {
return reinterpret_cast<TestConnectionHelper::TestAlarm*>(
QuicConnectionPeer::GetAckAlarm(this));
}
TestConnectionHelper::TestAlarm* GetRetransmissionAlarm() {
return reinterpret_cast<TestConnectionHelper::TestAlarm*>(
QuicConnectionPeer::GetRetransmissionAlarm(this));
}
TestConnectionHelper::TestAlarm* GetSendAlarm() {
return reinterpret_cast<TestConnectionHelper::TestAlarm*>(
QuicConnectionPeer::GetSendAlarm(this));
}
TestConnectionHelper::TestAlarm* GetResumeWritesAlarm() {
return reinterpret_cast<TestConnectionHelper::TestAlarm*>(
QuicConnectionPeer::GetResumeWritesAlarm(this));
}
TestConnectionHelper::TestAlarm* GetTimeoutAlarm() {
return reinterpret_cast<TestConnectionHelper::TestAlarm*>(
QuicConnectionPeer::GetTimeoutAlarm(this));
}
using QuicConnection::SelectMutualVersion;
private:
TestConnectionHelper* helper_;
TestPacketWriter* writer_;
DISALLOW_COPY_AND_ASSIGN(TestConnection);
};
class QuicConnectionTest : public ::testing::TestWithParam<bool> {
protected:
QuicConnectionTest()
: guid_(42),
framer_(QuicSupportedVersions(), QuicTime::Zero(), false),
creator_(guid_, &framer_, &random_generator_, false),
send_algorithm_(new StrictMock<MockSendAlgorithm>),
helper_(new TestConnectionHelper(&clock_, &random_generator_)),
writer_(new TestPacketWriter()),
connection_(guid_, IPEndPoint(), helper_.get(), writer_.get(), false),
frame1_(1, false, 0, MakeIOVector(data1)),
frame2_(1, false, 3, MakeIOVector(data2)),
accept_packet_(true) {
connection_.set_visitor(&visitor_);
connection_.SetSendAlgorithm(send_algorithm_);
framer_.set_received_entropy_calculator(&entropy_calculator_);
// Simplify tests by not sending feedback unless specifically configured.
SetFeedback(NULL);
EXPECT_CALL(
*send_algorithm_, TimeUntilSend(_, _, _, _)).WillRepeatedly(Return(
QuicTime::Delta::Zero()));
EXPECT_CALL(*receive_algorithm_,
RecordIncomingPacket(_, _, _, _)).Times(AnyNumber());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.Times(AnyNumber());
EXPECT_CALL(*send_algorithm_, RetransmissionDelay()).WillRepeatedly(
Return(QuicTime::Delta::Zero()));
EXPECT_CALL(*send_algorithm_, BandwidthEstimate()).WillRepeatedly(Return(
QuicBandwidth::FromKBitsPerSecond(100)));
EXPECT_CALL(*send_algorithm_, SmoothedRtt()).WillRepeatedly(Return(
QuicTime::Delta::FromMilliseconds(100)));
ON_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.WillByDefault(Return(true));
EXPECT_CALL(visitor_, HasPendingHandshake()).Times(AnyNumber());
EXPECT_CALL(visitor_, OnCanWrite()).Times(AnyNumber()).WillRepeatedly(
Return(true));
}
QuicAckFrame* outgoing_ack() {
outgoing_ack_.reset(QuicConnectionPeer::CreateAckFrame(&connection_));
return outgoing_ack_.get();
}
QuicAckFrame* last_ack() {
return writer_->ack();
}
QuicCongestionFeedbackFrame* last_feedback() {
return writer_->feedback();
}
QuicConnectionCloseFrame* last_close() {
return writer_->close();
}
QuicPacketHeader* last_header() {
return writer_->header();
}
size_t last_sent_packet_size() {
return writer_->last_packet_size();
}
uint32 final_bytes_of_last_packet() {
return writer_->final_bytes_of_last_packet();
}
uint32 final_bytes_of_previous_packet() {
return writer_->final_bytes_of_previous_packet();
}
void use_tagging_decrypter() {
writer_->use_tagging_decrypter();
}
void ProcessPacket(QuicPacketSequenceNumber number) {
EXPECT_CALL(visitor_, OnStreamFrames(_)).WillOnce(Return(accept_packet_));
ProcessDataPacket(number, 0, !kEntropyFlag);
}
QuicPacketEntropyHash ProcessFramePacket(QuicFrame frame) {
QuicFrames frames;
frames.push_back(QuicFrame(frame));
QuicPacketCreatorPeer::SetSendVersionInPacket(&creator_,
connection_.is_server());
SerializedPacket serialized_packet = creator_.SerializeAllFrames(frames);
scoped_ptr<QuicPacket> packet(serialized_packet.packet);
scoped_ptr<QuicEncryptedPacket> encrypted(
framer_.EncryptPacket(ENCRYPTION_NONE,
serialized_packet.sequence_number, *packet));
connection_.ProcessUdpPacket(IPEndPoint(), IPEndPoint(), *encrypted);
return serialized_packet.entropy_hash;
}
size_t ProcessDataPacket(QuicPacketSequenceNumber number,
QuicFecGroupNumber fec_group,
bool entropy_flag) {
return ProcessDataPacketAtLevel(number, fec_group, entropy_flag,
ENCRYPTION_NONE);
}
size_t ProcessDataPacketAtLevel(QuicPacketSequenceNumber number,
QuicFecGroupNumber fec_group,
bool entropy_flag,
EncryptionLevel level) {
scoped_ptr<QuicPacket> packet(ConstructDataPacket(number, fec_group,
entropy_flag));
scoped_ptr<QuicEncryptedPacket> encrypted(framer_.EncryptPacket(
level, number, *packet));
connection_.ProcessUdpPacket(IPEndPoint(), IPEndPoint(), *encrypted);
return encrypted->length();
}
void ProcessClosePacket(QuicPacketSequenceNumber number,
QuicFecGroupNumber fec_group) {
scoped_ptr<QuicPacket> packet(ConstructClosePacket(number, fec_group));
scoped_ptr<QuicEncryptedPacket> encrypted(framer_.EncryptPacket(
ENCRYPTION_NONE, number, *packet));
connection_.ProcessUdpPacket(IPEndPoint(), IPEndPoint(), *encrypted);
}
size_t ProcessFecProtectedPacket(QuicPacketSequenceNumber number,
bool expect_revival, bool entropy_flag) {
if (expect_revival) {
EXPECT_CALL(visitor_, OnStreamFrames(_)).WillOnce(Return(accept_packet_));
}
EXPECT_CALL(visitor_, OnStreamFrames(_)).WillOnce(Return(accept_packet_))
.RetiresOnSaturation();
return ProcessDataPacket(number, 1, entropy_flag);
}
// Processes an FEC packet that covers the packets that would have been
// received.
size_t ProcessFecPacket(QuicPacketSequenceNumber number,
QuicPacketSequenceNumber min_protected_packet,
bool expect_revival,
bool entropy_flag,
QuicPacket* packet) {
if (expect_revival) {
EXPECT_CALL(visitor_, OnStreamFrames(_)).WillOnce(Return(accept_packet_));
}
// Construct the decrypted data packet so we can compute the correct
// redundancy. If |packet| has been provided then use that, otherwise
// construct a default data packet.
scoped_ptr<QuicPacket> data_packet;
if (packet) {
data_packet.reset(packet);
} else {
data_packet.reset(ConstructDataPacket(number, 1, !kEntropyFlag));
}
header_.public_header.guid = guid_;
header_.public_header.reset_flag = false;
header_.public_header.version_flag = false;
header_.entropy_flag = entropy_flag;
header_.fec_flag = true;
header_.packet_sequence_number = number;
header_.is_in_fec_group = IN_FEC_GROUP;
header_.fec_group = min_protected_packet;
QuicFecData fec_data;
fec_data.fec_group = header_.fec_group;
// Since all data packets in this test have the same payload, the
// redundancy is either equal to that payload or the xor of that payload
// with itself, depending on the number of packets.
if (((number - min_protected_packet) % 2) == 0) {
for (size_t i = GetStartOfFecProtectedData(
header_.public_header.guid_length,
header_.public_header.version_flag,
header_.public_header.sequence_number_length);
i < data_packet->length(); ++i) {
data_packet->mutable_data()[i] ^= data_packet->data()[i];
}
}
fec_data.redundancy = data_packet->FecProtectedData();
scoped_ptr<QuicPacket> fec_packet(
framer_.BuildFecPacket(header_, fec_data).packet);
scoped_ptr<QuicEncryptedPacket> encrypted(
framer_.EncryptPacket(ENCRYPTION_NONE, number, *fec_packet));
connection_.ProcessUdpPacket(IPEndPoint(), IPEndPoint(), *encrypted);
return encrypted->length();
}
QuicByteCount SendStreamDataToPeer(QuicStreamId id,
StringPiece data,
QuicStreamOffset offset,
bool fin,
QuicPacketSequenceNumber* last_packet) {
QuicByteCount packet_size;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.WillOnce(DoAll(SaveArg<2>(&packet_size), Return(true)));
connection_.SendStreamDataWithString(id, data, offset, fin, NULL);
if (last_packet != NULL) {
*last_packet =
QuicConnectionPeer::GetPacketCreator(&connection_)->sequence_number();
}
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.Times(AnyNumber());
return packet_size;
}
void SendAckPacketToPeer() {
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
connection_.SendAck();
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _))
.Times(AnyNumber());
}
QuicPacketEntropyHash ProcessAckPacket(QuicAckFrame* frame) {
return ProcessFramePacket(QuicFrame(frame));
}
QuicPacketEntropyHash ProcessGoAwayPacket(QuicGoAwayFrame* frame) {
return ProcessFramePacket(QuicFrame(frame));
}
bool IsMissing(QuicPacketSequenceNumber number) {
return IsAwaitingPacket(outgoing_ack()->received_info, number);
}
QuicPacket* ConstructDataPacket(QuicPacketSequenceNumber number,
QuicFecGroupNumber fec_group,
bool entropy_flag) {
header_.public_header.guid = guid_;
header_.public_header.reset_flag = false;
header_.public_header.version_flag = false;
header_.entropy_flag = entropy_flag;
header_.fec_flag = false;
header_.packet_sequence_number = number;
header_.is_in_fec_group = fec_group == 0u ? NOT_IN_FEC_GROUP : IN_FEC_GROUP;
header_.fec_group = fec_group;
QuicFrames frames;
QuicFrame frame(&frame1_);
frames.push_back(frame);
QuicPacket* packet =
framer_.BuildUnsizedDataPacket(header_, frames).packet;
EXPECT_TRUE(packet != NULL);
return packet;
}
QuicPacket* ConstructClosePacket(QuicPacketSequenceNumber number,
QuicFecGroupNumber fec_group) {
header_.public_header.guid = guid_;
header_.packet_sequence_number = number;
header_.public_header.reset_flag = false;
header_.public_header.version_flag = false;
header_.entropy_flag = false;
header_.fec_flag = false;
header_.is_in_fec_group = fec_group == 0u ? NOT_IN_FEC_GROUP : IN_FEC_GROUP;
header_.fec_group = fec_group;
QuicConnectionCloseFrame qccf;
qccf.error_code = QUIC_PEER_GOING_AWAY;
QuicFrames frames;
QuicFrame frame(&qccf);
frames.push_back(frame);
QuicPacket* packet =
framer_.BuildUnsizedDataPacket(header_, frames).packet;
EXPECT_TRUE(packet != NULL);
return packet;
}
void SetFeedback(QuicCongestionFeedbackFrame* feedback) {
receive_algorithm_ = new TestReceiveAlgorithm(feedback);
connection_.SetReceiveAlgorithm(receive_algorithm_);
}
QuicTime::Delta DefaultRetransmissionTime() {
return QuicTime::Delta::FromMilliseconds(kDefaultRetransmissionTimeMs);
}
QuicTime::Delta DefaultDelayedAckTime() {
return QuicTime::Delta::FromMilliseconds(kMinRetransmissionTimeMs/2);
}
QuicGuid guid_;
QuicFramer framer_;
QuicPacketCreator creator_;
MockEntropyCalculator entropy_calculator_;
MockSendAlgorithm* send_algorithm_;
TestReceiveAlgorithm* receive_algorithm_;
MockClock clock_;
MockRandom random_generator_;
scoped_ptr<TestConnectionHelper> helper_;
scoped_ptr<TestPacketWriter> writer_;
TestConnection connection_;
StrictMock<MockConnectionVisitor> visitor_;
QuicPacketHeader header_;
QuicStreamFrame frame1_;
QuicStreamFrame frame2_;
scoped_ptr<QuicAckFrame> outgoing_ack_;
bool accept_packet_;
private:
DISALLOW_COPY_AND_ASSIGN(QuicConnectionTest);
};
TEST_F(QuicConnectionTest, PacketsInOrder) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(1);
EXPECT_EQ(1u, outgoing_ack()->received_info.largest_observed);
EXPECT_EQ(0u, outgoing_ack()->received_info.missing_packets.size());
ProcessPacket(2);
EXPECT_EQ(2u, outgoing_ack()->received_info.largest_observed);
EXPECT_EQ(0u, outgoing_ack()->received_info.missing_packets.size());
ProcessPacket(3);
EXPECT_EQ(3u, outgoing_ack()->received_info.largest_observed);
EXPECT_EQ(0u, outgoing_ack()->received_info.missing_packets.size());
}
TEST_F(QuicConnectionTest, PacketsRejected) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(1);
EXPECT_EQ(1u, outgoing_ack()->received_info.largest_observed);
EXPECT_EQ(0u, outgoing_ack()->received_info.missing_packets.size());
accept_packet_ = false;
ProcessPacket(2);
// We should not have an ack for two.
EXPECT_EQ(1u, outgoing_ack()->received_info.largest_observed);
EXPECT_EQ(0u, outgoing_ack()->received_info.missing_packets.size());
}
TEST_F(QuicConnectionTest, PacketsOutOfOrder) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(3);
EXPECT_EQ(3u, outgoing_ack()->received_info.largest_observed);
EXPECT_TRUE(IsMissing(2));
EXPECT_TRUE(IsMissing(1));
ProcessPacket(2);
EXPECT_EQ(3u, outgoing_ack()->received_info.largest_observed);
EXPECT_FALSE(IsMissing(2));
EXPECT_TRUE(IsMissing(1));
ProcessPacket(1);
EXPECT_EQ(3u, outgoing_ack()->received_info.largest_observed);
EXPECT_FALSE(IsMissing(2));
EXPECT_FALSE(IsMissing(1));
}
TEST_F(QuicConnectionTest, DuplicatePacket) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(3);
EXPECT_EQ(3u, outgoing_ack()->received_info.largest_observed);
EXPECT_TRUE(IsMissing(2));
EXPECT_TRUE(IsMissing(1));
// Send packet 3 again, but do not set the expectation that
// the visitor OnStreamFrames() will be called.
ProcessDataPacket(3, 0, !kEntropyFlag);
EXPECT_EQ(3u, outgoing_ack()->received_info.largest_observed);
EXPECT_TRUE(IsMissing(2));
EXPECT_TRUE(IsMissing(1));
}
TEST_F(QuicConnectionTest, PacketsOutOfOrderWithAdditionsAndLeastAwaiting) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(3);
EXPECT_EQ(3u, outgoing_ack()->received_info.largest_observed);
EXPECT_TRUE(IsMissing(2));
EXPECT_TRUE(IsMissing(1));
ProcessPacket(2);
EXPECT_EQ(3u, outgoing_ack()->received_info.largest_observed);
EXPECT_TRUE(IsMissing(1));
ProcessPacket(5);
EXPECT_EQ(5u, outgoing_ack()->received_info.largest_observed);
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.
creator_.set_sequence_number(5);
QuicAckFrame frame(0, QuicTime::Zero(), 4);
ProcessAckPacket(&frame);
// Force an ack to be sent.
SendAckPacketToPeer();
EXPECT_TRUE(IsMissing(4));
}
TEST_F(QuicConnectionTest, RejectPacketTooFarOut) {
// Call ProcessDataPacket rather than ProcessPacket, as we should not get a
// packet call to the visitor.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_INVALID_PACKET_HEADER, false));
ProcessDataPacket(6000, 0, !kEntropyFlag);
}
TEST_F(QuicConnectionTest, TruncatedAck) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
QuicPacketSequenceNumber num_packets = 256 * 2 + 1;
for (QuicPacketSequenceNumber i = 0; i < num_packets; ++i) {
SendStreamDataToPeer(1, "foo", i * 3, !kFin, NULL);
}
QuicAckFrame frame(num_packets, QuicTime::Zero(), 1);
// Create an ack with 256 nacks, none adjacent to one another.
for (QuicPacketSequenceNumber i = 1; i <= 256; ++i) {
frame.received_info.missing_packets.insert(i * 2);
}
frame.received_info.entropy_hash = 0;
EXPECT_CALL(entropy_calculator_,
EntropyHash(511)).WillOnce(testing::Return(0));
EXPECT_CALL(*send_algorithm_, OnPacketAcked(_, _, _)).Times(256);
EXPECT_CALL(*send_algorithm_, OnPacketLost(_, _)).Times(2);
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(_, _)).Times(2);
ProcessAckPacket(&frame);
QuicReceivedPacketManager* received_packet_manager =
QuicConnectionPeer::GetReceivedPacketManager(&connection_);
// A truncated ack will not have the true largest observed.
EXPECT_GT(num_packets,
received_packet_manager->peer_largest_observed_packet());
frame.received_info.missing_packets.erase(192);
frame.received_info.entropy_hash = 2;
// Removing one missing packet allows us to ack 192 and one more range.
EXPECT_CALL(*send_algorithm_, OnPacketAcked(_, _, _)).Times(2);
EXPECT_CALL(*send_algorithm_, OnPacketLost(_, _)).Times(2);
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(_, _)).Times(2);
ProcessAckPacket(&frame);
EXPECT_EQ(num_packets,
received_packet_manager->peer_largest_observed_packet());
}
TEST_F(QuicConnectionTest, AckReceiptCausesAckSendBadEntropy) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(1);
// Delay sending, then queue up an ack.
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, NOT_RETRANSMISSION, _, _)).WillOnce(
testing::Return(QuicTime::Delta::FromMicroseconds(1)));
QuicConnectionPeer::SendAck(&connection_);
// Process an ack with a least unacked of the received ack.
// This causes an ack to be sent when TimeUntilSend returns 0.
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, NOT_RETRANSMISSION, _, _)).WillRepeatedly(
testing::Return(QuicTime::Delta::Zero()));
// Skip a packet and then record an ack.
creator_.set_sequence_number(2);
QuicAckFrame frame(0, QuicTime::Zero(), 3);
ProcessAckPacket(&frame);
}
TEST_F(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_F(QuicConnectionTest, AckReceiptCausesAckSend) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnPacketLost(_, _)).Times(1);
QuicPacketSequenceNumber original;
QuicByteCount packet_size;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, NOT_RETRANSMISSION, _))
.WillOnce(DoAll(SaveArg<1>(&original), SaveArg<2>(&packet_size),
Return(true)));
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(1, _)).Times(1);
connection_.SendStreamDataWithString(3, "foo", 0, !kFin, NULL);
QuicAckFrame frame(original, QuicTime::Zero(), 1);
frame.received_info.missing_packets.insert(original);
frame.received_info.entropy_hash = QuicConnectionPeer::GetSentEntropyHash(
&connection_, original - 1);
// First nack triggers early retransmit.
QuicPacketSequenceNumber retransmission;
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, packet_size - kQuicVersionSize,
NACK_RETRANSMISSION, _))
.WillOnce(DoAll(SaveArg<1>(&retransmission), Return(true)));
ProcessAckPacket(&frame);
QuicAckFrame frame2(retransmission, QuicTime::Zero(), 1);
frame2.received_info.missing_packets.insert(original);
frame2.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, retransmission) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, original);
EXPECT_CALL(*send_algorithm_, OnPacketAcked(_, _, _));
ProcessAckPacket(&frame2);
// Now if the peer sends an ack which still reports the retransmitted packet
// as missing, then that will count as a packet which instigates an ack.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, NOT_RETRANSMISSION, _));
ProcessAckPacket(&frame2);
ProcessAckPacket(&frame2);
// But an ack with no missing packets will not send an ack.
frame2.received_info.missing_packets.clear();
frame2.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, retransmission);
ProcessAckPacket(&frame2);
ProcessAckPacket(&frame2);
}
TEST_F(QuicConnectionTest, LeastUnackedLower) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
SendStreamDataToPeer(1, "foo", 0, !kFin, NULL);
SendStreamDataToPeer(1, "bar", 3, !kFin, NULL);
SendStreamDataToPeer(1, "eep", 6, !kFin, NULL);
// Start out saying the least unacked is 2.
creator_.set_sequence_number(5);
QuicAckFrame frame(0, QuicTime::Zero(), 2);
ProcessAckPacket(&frame);
// Change it to 1, but lower the sequence number to fake out-of-order packets.
// This should be fine.
creator_.set_sequence_number(1);
QuicAckFrame frame2(0, QuicTime::Zero(), 1);
// The scheduler will not process out of order acks.
EXPECT_CALL(visitor_, OnCanWrite()).Times(0);
ProcessAckPacket(&frame2);
// Now claim it's one, but set the ordering so it was sent "after" the first
// one. This should cause a connection error.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_INVALID_ACK_DATA, false));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
creator_.set_sequence_number(7);
ProcessAckPacket(&frame2);
}
TEST_F(QuicConnectionTest, LargestObservedLower) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
SendStreamDataToPeer(1, "foo", 0, !kFin, NULL);
SendStreamDataToPeer(1, "bar", 3, !kFin, NULL);
SendStreamDataToPeer(1, "eep", 6, !kFin, NULL);
EXPECT_CALL(*send_algorithm_, OnPacketAcked(_, _, _)).Times(2);
// Start out saying the largest observed is 2.
QuicAckFrame frame(2, QuicTime::Zero(), 0);
frame.received_info.entropy_hash = QuicConnectionPeer::GetSentEntropyHash(
&connection_, 2);
ProcessAckPacket(&frame);
// Now change it to 1, and it should cause a connection error.
QuicAckFrame frame2(1, QuicTime::Zero(), 0);
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_INVALID_ACK_DATA, false));
EXPECT_CALL(visitor_, OnCanWrite()).Times(0);
ProcessAckPacket(&frame2);
}
TEST_F(QuicConnectionTest, AckUnsentData) {
// Ack a packet which has not been sent.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_INVALID_ACK_DATA, false));
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
QuicAckFrame frame(1, QuicTime::Zero(), 0);
EXPECT_CALL(visitor_, OnCanWrite()).Times(0);
ProcessAckPacket(&frame);
}
TEST_F(QuicConnectionTest, AckAll) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(1);
creator_.set_sequence_number(1);
QuicAckFrame frame1(0, QuicTime::Zero(), 1);
ProcessAckPacket(&frame1);
}
TEST_F(QuicConnectionTest, SendingDifferentSequenceNumberLengthsBandwidth) {
EXPECT_CALL(*send_algorithm_, BandwidthEstimate()).WillOnce(Return(
QuicBandwidth::FromKBitsPerSecond(1000)));
QuicPacketSequenceNumber last_packet;
SendStreamDataToPeer(1, "foo", 0, !kFin, &last_packet);
EXPECT_EQ(1u, last_packet);
EXPECT_EQ(PACKET_1BYTE_SEQUENCE_NUMBER,
connection_.options()->send_sequence_number_length);
EXPECT_EQ(PACKET_1BYTE_SEQUENCE_NUMBER,
last_header()->public_header.sequence_number_length);
EXPECT_CALL(*send_algorithm_, BandwidthEstimate()).WillOnce(Return(
QuicBandwidth::FromKBitsPerSecond(1000 * 256)));
SendStreamDataToPeer(1, "bar", 3, !kFin, &last_packet);
EXPECT_EQ(2u, last_packet);
EXPECT_EQ(PACKET_2BYTE_SEQUENCE_NUMBER,
connection_.options()->send_sequence_number_length);
// The 1 packet lag is due to the sequence number length being recalculated in
// QuicConnection after a packet is sent.
EXPECT_EQ(PACKET_1BYTE_SEQUENCE_NUMBER,
last_header()->public_header.sequence_number_length);
EXPECT_CALL(*send_algorithm_, BandwidthEstimate()).WillOnce(Return(
QuicBandwidth::FromKBitsPerSecond(1000 * 256 * 256)));
SendStreamDataToPeer(1, "foo", 6, !kFin, &last_packet);
EXPECT_EQ(3u, last_packet);
EXPECT_EQ(PACKET_4BYTE_SEQUENCE_NUMBER,
connection_.options()->send_sequence_number_length);
EXPECT_EQ(PACKET_2BYTE_SEQUENCE_NUMBER,
last_header()->public_header.sequence_number_length);
EXPECT_CALL(*send_algorithm_, BandwidthEstimate()).WillOnce(Return(
QuicBandwidth::FromKBitsPerSecond(1000ll * 256 * 256 * 256)));
SendStreamDataToPeer(1, "bar", 9, !kFin, &last_packet);
EXPECT_EQ(4u, last_packet);
EXPECT_EQ(PACKET_4BYTE_SEQUENCE_NUMBER,
connection_.options()->send_sequence_number_length);
EXPECT_EQ(PACKET_4BYTE_SEQUENCE_NUMBER,
last_header()->public_header.sequence_number_length);
EXPECT_CALL(*send_algorithm_, BandwidthEstimate()).WillOnce(Return(
QuicBandwidth::FromKBitsPerSecond(1000ll * 256 * 256 * 256 * 256)));
SendStreamDataToPeer(1, "foo", 12, !kFin, &last_packet);
EXPECT_EQ(5u, last_packet);
EXPECT_EQ(PACKET_6BYTE_SEQUENCE_NUMBER,
connection_.options()->send_sequence_number_length);
EXPECT_EQ(PACKET_4BYTE_SEQUENCE_NUMBER,
last_header()->public_header.sequence_number_length);
}
TEST_F(QuicConnectionTest, SendingDifferentSequenceNumberLengthsUnackedDelta) {
QuicPacketSequenceNumber last_packet;
SendStreamDataToPeer(1, "foo", 0, !kFin, &last_packet);
EXPECT_EQ(1u, last_packet);
EXPECT_EQ(PACKET_1BYTE_SEQUENCE_NUMBER,
connection_.options()->send_sequence_number_length);
EXPECT_EQ(PACKET_1BYTE_SEQUENCE_NUMBER,
last_header()->public_header.sequence_number_length);
QuicConnectionPeer::GetPacketCreator(&connection_)->set_sequence_number(100);
SendStreamDataToPeer(1, "bar", 3, !kFin, &last_packet);
EXPECT_EQ(PACKET_2BYTE_SEQUENCE_NUMBER,
connection_.options()->send_sequence_number_length);
EXPECT_EQ(PACKET_1BYTE_SEQUENCE_NUMBER,
last_header()->public_header.sequence_number_length);
QuicConnectionPeer::GetPacketCreator(&connection_)->set_sequence_number(
100 * 256);
SendStreamDataToPeer(1, "foo", 6, !kFin, &last_packet);
EXPECT_EQ(PACKET_4BYTE_SEQUENCE_NUMBER,
connection_.options()->send_sequence_number_length);
EXPECT_EQ(PACKET_2BYTE_SEQUENCE_NUMBER,
last_header()->public_header.sequence_number_length);
QuicConnectionPeer::GetPacketCreator(&connection_)->set_sequence_number(
100 * 256 * 256);
SendStreamDataToPeer(1, "bar", 9, !kFin, &last_packet);
EXPECT_EQ(PACKET_4BYTE_SEQUENCE_NUMBER,
connection_.options()->send_sequence_number_length);
EXPECT_EQ(PACKET_4BYTE_SEQUENCE_NUMBER,
last_header()->public_header.sequence_number_length);
QuicConnectionPeer::GetPacketCreator(&connection_)->set_sequence_number(
100 * 256 * 256 * 256);
SendStreamDataToPeer(1, "foo", 12, !kFin, &last_packet);
EXPECT_EQ(PACKET_6BYTE_SEQUENCE_NUMBER,
connection_.options()->send_sequence_number_length);
EXPECT_EQ(PACKET_4BYTE_SEQUENCE_NUMBER,
last_header()->public_header.sequence_number_length);
}
TEST_F(QuicConnectionTest, BasicSending) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnPacketAcked(_, _, _)).Times(6);
QuicPacketSequenceNumber last_packet;
SendStreamDataToPeer(1, "foo", 0, !kFin, &last_packet); // Packet 1
EXPECT_EQ(1u, last_packet);
SendAckPacketToPeer(); // Packet 2
EXPECT_EQ(1u, last_ack()->sent_info.least_unacked);
SendAckPacketToPeer(); // Packet 3
EXPECT_EQ(1u, last_ack()->sent_info.least_unacked);
SendStreamDataToPeer(1, "bar", 3, !kFin, &last_packet); // Packet 4
EXPECT_EQ(4u, last_packet);
SendAckPacketToPeer(); // Packet 5
EXPECT_EQ(1u, last_ack()->sent_info.least_unacked);
// Peer acks up to packet 3.
QuicAckFrame frame(3, QuicTime::Zero(), 0);
frame.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 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.
EXPECT_EQ(4u, last_ack()->sent_info.least_unacked);
// Peer acks up to packet 4, the last packet.
QuicAckFrame frame2(6, QuicTime::Zero(), 0);
frame2.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 6);
ProcessAckPacket(&frame2); // Acks don't instigate acks.
// Verify that we did not send an ack.
EXPECT_EQ(6u, last_header()->packet_sequence_number);
// So the last ack has not changed.
EXPECT_EQ(4u, last_ack()->sent_info.least_unacked);
// If we force an ack, we shouldn't change our retransmit state.
SendAckPacketToPeer(); // Packet 7
EXPECT_EQ(7u, last_ack()->sent_info.least_unacked);
// But if we send more data it should.
SendStreamDataToPeer(1, "eep", 6, !kFin, &last_packet); // Packet 8
EXPECT_EQ(8u, last_packet);
SendAckPacketToPeer(); // Packet 9
EXPECT_EQ(8u, last_ack()->sent_info.least_unacked);
}
TEST_F(QuicConnectionTest, FECSending) {
// All packets carry version info till version is negotiated.
size_t payload_length;
connection_.options()->max_packet_length =
GetPacketLengthForOneStream(
connection_.version(), kIncludeVersion, PACKET_1BYTE_SEQUENCE_NUMBER,
IN_FEC_GROUP, &payload_length);
// And send FEC every two packets.
connection_.options()->max_packets_per_fec_group = 2;
// Send 4 data packets and 2 FEC packets.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(6);
// The first stream frame will consume 2 fewer bytes than the other three.
const string payload(payload_length * 4 - 6, 'a');
connection_.SendStreamDataWithString(1, payload, 0, !kFin, NULL);
// Expect the FEC group to be closed after SendStreamDataWithString.
EXPECT_FALSE(creator_.ShouldSendFec(true));
}
TEST_F(QuicConnectionTest, FECQueueing) {
// All packets carry version info till version is negotiated.
size_t payload_length;
connection_.options()->max_packet_length =
GetPacketLengthForOneStream(
connection_.version(), kIncludeVersion, PACKET_1BYTE_SEQUENCE_NUMBER,
IN_FEC_GROUP, &payload_length);
// And send FEC every two packets.
connection_.options()->max_packets_per_fec_group = 2;
EXPECT_EQ(0u, connection_.NumQueuedPackets());
writer_->set_blocked(true);
const string payload(payload_length, 'a');
connection_.SendStreamDataWithString(1, payload, 0, !kFin, NULL);
EXPECT_FALSE(creator_.ShouldSendFec(true));
// Expect the first data packet and the fec packet to be queued.
EXPECT_EQ(2u, connection_.NumQueuedPackets());
}
TEST_F(QuicConnectionTest, AbandonFECFromCongestionWindow) {
connection_.options()->max_packets_per_fec_group = 1;
// 1 Data and 1 FEC packet.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(2);
connection_.SendStreamDataWithString(1, "foo", 0, !kFin, NULL);
const QuicTime::Delta retransmission_time =
QuicTime::Delta::FromMilliseconds(5000);
clock_.AdvanceTime(retransmission_time);
// Abandon FEC packet and data packet.
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(_, _)).Times(2);
EXPECT_CALL(*send_algorithm_, OnRetransmissionTimeout());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
EXPECT_CALL(visitor_, OnCanWrite());
connection_.OnRetransmissionTimeout();
}
TEST_F(QuicConnectionTest, DontAbandonAckedFEC) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
connection_.options()->max_packets_per_fec_group = 1;
// 1 Data and 1 FEC packet.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(6);
connection_.SendStreamDataWithString(1, "foo", 0, !kFin, NULL);
// Send some more data afterwards to ensure early retransmit doesn't trigger.
connection_.SendStreamDataWithString(1, "foo", 3, !kFin, NULL);
connection_.SendStreamDataWithString(1, "foo", 6, !kFin, NULL);
QuicAckFrame ack_fec(2, QuicTime::Zero(), 1);
// Data packet missing.
// TODO(ianswett): Note that this is not a sensible ack, since if the FEC was
// received, it would cause the covered packet to be acked as well.
ack_fec.received_info.missing_packets.insert(1);
ack_fec.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 2) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 1);
EXPECT_CALL(*send_algorithm_, OnPacketAcked(_, _, _)).Times(1);
ProcessAckPacket(&ack_fec);
clock_.AdvanceTime(DefaultRetransmissionTime());
// Don't abandon the acked FEC packet, but it will abandon 2 the subsequent
// FEC packets.
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(_, _)).Times(5);
EXPECT_CALL(*send_algorithm_, OnRetransmissionTimeout());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(3);
connection_.GetRetransmissionAlarm()->Fire();
}
TEST_F(QuicConnectionTest, DontAbandonAllFEC) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
connection_.options()->max_packets_per_fec_group = 1;
// 1 Data and 1 FEC packet.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(6);
connection_.SendStreamDataWithString(1, "foo", 0, !kFin, NULL);
// Send some more data afterwards to ensure early retransmit doesn't trigger.
connection_.SendStreamDataWithString(1, "foo", 3, !kFin, NULL);
// Advance the time so not all the FEC packets are abandoned.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(1));
connection_.SendStreamDataWithString(1, "foo", 6, !kFin, NULL);
QuicAckFrame ack_fec(5, QuicTime::Zero(), 1);
// Ack all data packets, but no fec packets.
ack_fec.received_info.missing_packets.insert(2);
ack_fec.received_info.missing_packets.insert(4);
ack_fec.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 5) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 4) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 3) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 2) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 1);
// Lose the first FEC packet and ack the three data packets.
EXPECT_CALL(*send_algorithm_, OnPacketAcked(_, _, _)).Times(3);
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(2, _));
EXPECT_CALL(*send_algorithm_, OnPacketLost(2, _));
ProcessAckPacket(&ack_fec);
clock_.AdvanceTime(DefaultRetransmissionTime().Subtract(
QuicTime::Delta::FromMilliseconds(1)));
// Don't abandon the acked FEC packet, but it will abandon 1 of the subsequent
// FEC packets.
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(4, _));
connection_.GetRetransmissionAlarm()->Fire();
// Ensure the connection's alarm is still set, in order to abandon the third
// FEC packet.
EXPECT_TRUE(connection_.GetRetransmissionAlarm()->IsSet());
}
TEST_F(QuicConnectionTest, FramePacking) {
// Block the connection.
connection_.GetSendAlarm()->Set(
clock_.ApproximateNow().Add(QuicTime::Delta::FromSeconds(1)));
// Send an ack and two stream frames in 1 packet by queueing them.
connection_.SendAck();
EXPECT_CALL(visitor_, OnCanWrite()).WillOnce(DoAll(
IgnoreResult(InvokeWithoutArgs(&connection_,
&TestConnection::SendStreamData3)),
IgnoreResult(InvokeWithoutArgs(&connection_,
&TestConnection::SendStreamData5)),
Return(true)));
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, _, NOT_RETRANSMISSION, _))
.Times(1);
// Unblock the connection.
connection_.GetSendAlarm()->Fire();
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.
EXPECT_EQ(3u, writer_->frame_count());
EXPECT_TRUE(writer_->ack());
EXPECT_EQ(2u, writer_->stream_frames()->size());
EXPECT_EQ(kStreamId3, (*writer_->stream_frames())[0].stream_id);
EXPECT_EQ(kStreamId5, (*writer_->stream_frames())[1].stream_id);
}
TEST_F(QuicConnectionTest, FramePackingNonCryptoThenCrypto) {
// Block the connection.
connection_.GetSendAlarm()->Set(
clock_.ApproximateNow().Add(QuicTime::Delta::FromSeconds(1)));
// Send an ack and two stream frames (one non-crypto, then one crypto) in 2
// packets by queueing them.
connection_.SendAck();
EXPECT_CALL(visitor_, OnCanWrite()).WillOnce(DoAll(
IgnoreResult(InvokeWithoutArgs(&connection_,
&TestConnection::SendStreamData3)),
IgnoreResult(InvokeWithoutArgs(&connection_,
&TestConnection::SendCryptoStreamData)),
Return(true)));
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, _, NOT_RETRANSMISSION, _))
.Times(2);
// Unblock the connection.
connection_.GetSendAlarm()->Fire();
EXPECT_EQ(0u, connection_.NumQueuedPackets());
EXPECT_FALSE(connection_.HasQueuedData());
// Parse the last packet and ensure it's the crypto stream frame.
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_EQ(1u, writer_->stream_frames()->size());
EXPECT_EQ(kCryptoStreamId, (*writer_->stream_frames())[0].stream_id);
}
TEST_F(QuicConnectionTest, FramePackingCryptoThenNonCrypto) {
// Block the connection.
connection_.GetSendAlarm()->Set(
clock_.ApproximateNow().Add(QuicTime::Delta::FromSeconds(1)));
// Send an ack and two stream frames (one crypto, then one non-crypto) in 3
// packets by queueing them.
connection_.SendAck();
EXPECT_CALL(visitor_, OnCanWrite()).WillOnce(DoAll(
IgnoreResult(InvokeWithoutArgs(&connection_,
&TestConnection::SendCryptoStreamData)),
IgnoreResult(InvokeWithoutArgs(&connection_,
&TestConnection::SendStreamData3)),
Return(true)));
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, _, NOT_RETRANSMISSION, _))
.Times(3);
// Unblock the connection.
connection_.GetSendAlarm()->Fire();
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());
EXPECT_EQ(1u, writer_->stream_frames()->size());
EXPECT_EQ(kStreamId3, (*writer_->stream_frames())[0].stream_id);
}
TEST_F(QuicConnectionTest, FramePackingFEC) {
// Enable fec.
connection_.options()->max_packets_per_fec_group = 6;
// Block the connection.
connection_.GetSendAlarm()->Set(
clock_.ApproximateNow().Add(QuicTime::Delta::FromSeconds(1)));
// Send an ack and two stream frames in 1 packet by queueing them.
connection_.SendAck();
EXPECT_CALL(visitor_, OnCanWrite()).WillOnce(DoAll(
IgnoreResult(InvokeWithoutArgs(&connection_,
&TestConnection::SendStreamData3)),
IgnoreResult(InvokeWithoutArgs(&connection_,
&TestConnection::SendStreamData5)),
Return(true)));
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, _, NOT_RETRANSMISSION, _)).Times(2);
// Unblock the connection.
connection_.GetSendAlarm()->Fire();
EXPECT_EQ(0u, connection_.NumQueuedPackets());
EXPECT_FALSE(connection_.HasQueuedData());
// Parse the last packet and ensure it's in an fec group.
EXPECT_EQ(1u, writer_->header()->fec_group);
EXPECT_EQ(0u, writer_->frame_count());
}
TEST_F(QuicConnectionTest, FramePackingAckResponse) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Process a data packet to queue up a pending ack.
EXPECT_CALL(visitor_, OnStreamFrames(_)).WillOnce(Return(true));
ProcessDataPacket(1, 1, kEntropyFlag);
EXPECT_CALL(visitor_, OnCanWrite()).WillOnce(DoAll(
IgnoreResult(InvokeWithoutArgs(&connection_,
&TestConnection::SendStreamData3)),
IgnoreResult(InvokeWithoutArgs(&connection_,
&TestConnection::SendStreamData5)),
Return(true)));
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, _, NOT_RETRANSMISSION, _))
.Times(1);
// Process an ack to cause the visitor's OnCanWrite to be invoked.
creator_.set_sequence_number(2);
QuicAckFrame ack_one(0, QuicTime::Zero(), 0);
ProcessAckPacket(&ack_one);
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.
EXPECT_EQ(3u, writer_->frame_count());
EXPECT_TRUE(writer_->ack());
ASSERT_EQ(2u, writer_->stream_frames()->size());
EXPECT_EQ(kStreamId3, (*writer_->stream_frames())[0].stream_id);
EXPECT_EQ(kStreamId5, (*writer_->stream_frames())[1].stream_id);
}
TEST_F(QuicConnectionTest, FramePackingSendv) {
// Send data in 1 packet by writing multiple blocks in a single iovector
// using writev.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, NOT_RETRANSMISSION, _));
char data[] = "ABCD";
IOVector data_iov;
data_iov.AppendNoCoalesce(data, 2);
data_iov.AppendNoCoalesce(data + 2, 2);
connection_.SendStreamData(1, data_iov, 0, !kFin, NULL);
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(1u, writer_->frame_count());
EXPECT_EQ(1u, writer_->stream_frames()->size());
QuicStreamFrame frame = (*writer_->stream_frames())[0];
EXPECT_EQ(1u, frame.stream_id);
EXPECT_EQ("ABCD", string(static_cast<char*>
(frame.data.iovec()[0].iov_base),
(frame.data.iovec()[0].iov_len)));
}
TEST_F(QuicConnectionTest, FramePackingSendvQueued) {
// Try to send two stream frames in 1 packet by using writev.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, NOT_RETRANSMISSION, _));
writer_->set_blocked(true);
char data[] = "ABCD";
IOVector data_iov;
data_iov.AppendNoCoalesce(data, 2);
data_iov.AppendNoCoalesce(data + 2, 2);
connection_.SendStreamData(1, data_iov, 0, !kFin, NULL);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
EXPECT_TRUE(connection_.HasQueuedData());
// Attempt to send all packets, but since we're actually still
// blocked, they should all remain queued.
EXPECT_FALSE(connection_.OnCanWrite());
EXPECT_EQ(1u, connection_.NumQueuedPackets());
// Unblock the writes and actually send.
writer_->set_blocked(false);
EXPECT_TRUE(connection_.OnCanWrite());
EXPECT_EQ(0u, connection_.NumQueuedPackets());
// 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(1u, (*writer_->stream_frames())[0].stream_id);
}
TEST_F(QuicConnectionTest, SendingZeroBytes) {
// Send a zero byte write with a fin using writev.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, NOT_RETRANSMISSION, _));
IOVector empty_iov;
connection_.SendStreamData(1, empty_iov, 0, kFin, NULL);
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(1u, (*writer_->stream_frames())[0].stream_id);
EXPECT_TRUE((*writer_->stream_frames())[0].fin);
}
TEST_F(QuicConnectionTest, OnCanWrite) {
// Visitor's OnCanWill send data, but will return false.
EXPECT_CALL(visitor_, OnCanWrite()).WillOnce(DoAll(
IgnoreResult(InvokeWithoutArgs(&connection_,
&TestConnection::SendStreamData3)),
IgnoreResult(InvokeWithoutArgs(&connection_,
&TestConnection::SendStreamData5)),
Return(false)));
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, NOT_RETRANSMISSION, _, _)).WillRepeatedly(
testing::Return(QuicTime::Delta::Zero()));
// Unblock the connection.
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(kStreamId3, (*writer_->stream_frames())[0].stream_id);
EXPECT_EQ(kStreamId5, (*writer_->stream_frames())[1].stream_id);
}
TEST_F(QuicConnectionTest, RetransmitOnNack) {
EXPECT_CALL(*send_algorithm_, OnPacketAcked(_, _, _)).Times(2);
EXPECT_CALL(*send_algorithm_, OnPacketLost(_, _)).Times(1);
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(2, _)).Times(1);
QuicPacketSequenceNumber last_packet;
QuicByteCount second_packet_size;
SendStreamDataToPeer(3, "foo", 0, !kFin, &last_packet); // Packet 1
second_packet_size =
SendStreamDataToPeer(3, "foos", 3, !kFin, &last_packet); // Packet 2
SendStreamDataToPeer(3, "fooos", 7, !kFin, &last_packet); // Packet 3
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Peer acks one but not two or three. Right now we only retransmit on
// explicit nack, so it should not trigger a retransmission.
QuicAckFrame ack_one(1, QuicTime::Zero(), 0);
ack_one.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 1);
ProcessAckPacket(&ack_one);
ProcessAckPacket(&ack_one);
ProcessAckPacket(&ack_one);
// Peer acks up to 3 with two explicitly missing.
// Early retransmit causes 2 to be retransmitted on the first ack.
QuicAckFrame nack_two(3, QuicTime::Zero(), 0);
nack_two.received_info.missing_packets.insert(2);
nack_two.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 3) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 2) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 1);
// The third nack should trigger a retransmission.
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, second_packet_size - kQuicVersionSize,
NACK_RETRANSMISSION, _)).Times(1);
ProcessAckPacket(&nack_two);
}
TEST_F(QuicConnectionTest, DiscardRetransmit) {
EXPECT_CALL(*send_algorithm_, OnPacketAcked(_, _, _)).Times(2);
EXPECT_CALL(*send_algorithm_, OnPacketLost(_, _)).Times(1);
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(2, _)).Times(1);
QuicPacketSequenceNumber last_packet;
SendStreamDataToPeer(1, "foo", 0, !kFin, &last_packet); // Packet 1
SendStreamDataToPeer(1, "foos", 3, !kFin, &last_packet); // Packet 2
SendStreamDataToPeer(1, "fooos", 7, !kFin, &last_packet); // Packet 3
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Peer acks one but not two or three. Right now we only retransmit on
// explicit nack, so it should not trigger a retransmission.
QuicAckFrame ack_one(1, QuicTime::Zero(), 0);
ack_one.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 1);
ProcessAckPacket(&ack_one);
ProcessAckPacket(&ack_one);
ProcessAckPacket(&ack_one);
// Peer acks up to 3 with two explicitly missing. Two nacks should cause no
// change.
QuicAckFrame nack_two(3, QuicTime::Zero(), 0);
nack_two.received_info.missing_packets.insert(2);
nack_two.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 3) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 2) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 1);
// The first nack should trigger a fast retransmission, but we'll be
// write blocked, so the packet will be queued.
writer_->set_blocked(true);
ProcessAckPacket(&nack_two);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
// Now, ack the previous transmission.
QuicAckFrame ack_all(3, QuicTime::Zero(), 0);
ack_all.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 3);
ProcessAckPacket(&ack_all);
// Unblock the socket and attempt to send the queued packets. However,
// since the previous transmission has been acked, we will not
// send the retransmission.
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, _, _, _)).Times(0);
writer_->set_blocked(false);
connection_.OnCanWrite();
EXPECT_EQ(0u, connection_.NumQueuedPackets());
}
TEST_F(QuicConnectionTest, RetransmitNackedLargestObserved) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnPacketLost(_, _)).Times(1);
QuicPacketSequenceNumber largest_observed;
QuicByteCount packet_size;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, NOT_RETRANSMISSION, _))
.WillOnce(DoAll(SaveArg<1>(&largest_observed), SaveArg<2>(&packet_size),
Return(true)));
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(1, _)).Times(1);
connection_.SendStreamDataWithString(3, "foo", 0, !kFin, NULL);
QuicAckFrame frame(1, QuicTime::Zero(), largest_observed);
frame.received_info.missing_packets.insert(largest_observed);
frame.received_info.entropy_hash = QuicConnectionPeer::GetSentEntropyHash(
&connection_, largest_observed - 1);
// The first nack should retransmit the largest observed packet.
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, packet_size - kQuicVersionSize,
NACK_RETRANSMISSION, _));
ProcessAckPacket(&frame);
}
TEST_F(QuicConnectionTest, QueueAfterTwoRTOs) {
for (int i = 0; i < 10; ++i) {
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
connection_.SendStreamDataWithString(1, "foo", i * 3, !kFin, NULL);
}
// Block the congestion window and ensure they're queued.
writer_->set_blocked(true);
clock_.AdvanceTime(DefaultRetransmissionTime());
// Only one packet should be retransmitted.
EXPECT_CALL(*send_algorithm_, OnRetransmissionTimeout());
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(_, _)).Times(10);
connection_.GetRetransmissionAlarm()->Fire();
EXPECT_TRUE(connection_.HasQueuedData());
// Unblock the congestion window.
writer_->set_blocked(false);
clock_.AdvanceTime(QuicTime::Delta::FromMicroseconds(
2 * DefaultRetransmissionTime().ToMicroseconds()));
// Retransmit already retransmitted packets event though the sequence number
// greater than the largest observed.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(10);
connection_.GetRetransmissionAlarm()->Fire();
connection_.OnCanWrite();
}
TEST_F(QuicConnectionTest, WriteBlockedThenSent) {
writer_->set_blocked(true);
writer_->set_is_write_blocked_data_buffered(true);
connection_.SendStreamDataWithString(1, "foo", 0, !kFin, NULL);
EXPECT_FALSE(connection_.GetRetransmissionAlarm()->IsSet());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
connection_.OnPacketSent(WriteResult(WRITE_STATUS_OK, 0));
EXPECT_TRUE(connection_.GetRetransmissionAlarm()->IsSet());
}
TEST_F(QuicConnectionTest, ResumptionAlarmThenWriteBlocked) {
// Set the send and resumption alarm, then block the connection.
connection_.GetResumeWritesAlarm()->Set(clock_.ApproximateNow());
connection_.GetSendAlarm()->Set(clock_.ApproximateNow());
QuicConnectionPeer::SetIsWriteBlocked(&connection_, true);
// Fire the alarms and ensure the connection is still write blocked.
connection_.GetResumeWritesAlarm()->Fire();
connection_.GetSendAlarm()->Fire();
EXPECT_TRUE(QuicConnectionPeer::IsWriteBlocked(&connection_));
}
TEST_F(QuicConnectionTest, LimitPacketsPerNack) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnPacketAcked(15, _, _)).Times(1);
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(_, _)).Times(4);
int offset = 0;
// Send packets 1 to 15.
for (int i = 0; i < 15; ++i) {
SendStreamDataToPeer(1, "foo", offset, !kFin, NULL);
offset += 3;
}
// Ack 15, nack 1-14.
QuicAckFrame nack(15, QuicTime::Zero(), 0);
for (int i = 1; i < 15; ++i) {
nack.received_info.missing_packets.insert(i);
}
nack.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 15) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 14);
// 13 packets have been NACK'd 3 times, but we limit retransmissions to 2.
EXPECT_CALL(*send_algorithm_, OnPacketLost(_, _)).Times(2);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(2);
ProcessAckPacket(&nack);
// The next call should trigger retransmitting 2 more packets.
EXPECT_CALL(*send_algorithm_, OnPacketLost(_, _)).Times(2);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(2);
ProcessAckPacket(&nack);
}
// Test sending multiple acks from the connection to the session.
TEST_F(QuicConnectionTest, MultipleAcks) {
EXPECT_CALL(*send_algorithm_, OnPacketAcked(_, _, _)).Times(6);
QuicPacketSequenceNumber last_packet;
SendStreamDataToPeer(1, "foo", 0, !kFin, &last_packet); // Packet 1
EXPECT_EQ(1u, last_packet);
SendStreamDataToPeer(3, "foo", 0, !kFin, &last_packet); // Packet 2
EXPECT_EQ(2u, last_packet);
SendAckPacketToPeer(); // Packet 3
SendStreamDataToPeer(5, "foo", 0, !kFin, &last_packet); // Packet 4
EXPECT_EQ(4u, last_packet);
SendStreamDataToPeer(1, "foo", 3, !kFin, &last_packet); // Packet 5
EXPECT_EQ(5u, last_packet);
SendStreamDataToPeer(3, "foo", 3, !kFin, &last_packet); // Packet 6
EXPECT_EQ(6u, last_packet);
// Client will ack packets 1, 2, [!3], 4, 5.
QuicAckFrame frame1(5, QuicTime::Zero(), 0);
frame1.received_info.missing_packets.insert(3);
frame1.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 5) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 3) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 2);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessAckPacket(&frame1);
// Now the client implicitly acks 3, and explicitly acks 6.
QuicAckFrame frame2(6, QuicTime::Zero(), 0);
frame2.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 6);
ProcessAckPacket(&frame2);
}
TEST_F(QuicConnectionTest, DontLatchUnackedPacket) {
EXPECT_CALL(*send_algorithm_, OnPacketAcked(_, _, _)).Times(1);
SendStreamDataToPeer(1, "foo", 0, !kFin, NULL); // Packet 1;
SendAckPacketToPeer(); // Packet 2
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
QuicAckFrame frame(1, QuicTime::Zero(), 0);
frame.received_info.entropy_hash = QuicConnectionPeer::GetSentEntropyHash(
&connection_, 1);
ProcessAckPacket(&frame);
// Verify that our internal state has least-unacked as 3.
EXPECT_EQ(3u, outgoing_ack()->sent_info.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
// Since this was an ack packet, we set least_unacked to 4.
EXPECT_EQ(4u, outgoing_ack()->sent_info.least_unacked);
// Check that the outgoing ack had its sequence number as least_unacked.
EXPECT_EQ(3u, last_ack()->sent_info.least_unacked);
SendStreamDataToPeer(1, "bar", 3, false, NULL); // Packet 4
EXPECT_EQ(4u, outgoing_ack()->sent_info.least_unacked);
SendAckPacketToPeer(); // Packet 5
EXPECT_EQ(4u, last_ack()->sent_info.least_unacked);
}
TEST_F(QuicConnectionTest, ReviveMissingPacketAfterFecPacket) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Don't send missing packet 1.
ProcessFecPacket(2, 1, true, !kEntropyFlag, NULL);
// Entropy flag should be false, so entropy should be 0.
EXPECT_EQ(0u, QuicConnectionPeer::ReceivedEntropyHash(&connection_, 2));
}
TEST_F(QuicConnectionTest, ReviveMissingPacketAfterDataPacketThenFecPacket) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessFecProtectedPacket(1, false, kEntropyFlag);
// Don't send missing packet 2.
ProcessFecPacket(3, 1, true, !kEntropyFlag, NULL);
// Entropy flag should be true, so entropy should not be 0.
EXPECT_NE(0u, QuicConnectionPeer::ReceivedEntropyHash(&connection_, 2));
}
TEST_F(QuicConnectionTest, ReviveMissingPacketAfterDataPacketsThenFecPacket) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessFecProtectedPacket(1, false, !kEntropyFlag);
// Don't send missing packet 2.
ProcessFecProtectedPacket(3, false, !kEntropyFlag);
ProcessFecPacket(4, 1, true, kEntropyFlag, NULL);
// Entropy flag should be true, so entropy should not be 0.
EXPECT_NE(0u, QuicConnectionPeer::ReceivedEntropyHash(&connection_, 2));
}
TEST_F(QuicConnectionTest, ReviveMissingPacketAfterDataPacket) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Don't send missing packet 1.
ProcessFecPacket(3, 1, false, !kEntropyFlag, NULL);
// Out of order.
ProcessFecProtectedPacket(2, true, !kEntropyFlag);
// Entropy flag should be false, so entropy should be 0.
EXPECT_EQ(0u, QuicConnectionPeer::ReceivedEntropyHash(&connection_, 2));
}
TEST_F(QuicConnectionTest, ReviveMissingPacketAfterDataPackets) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessFecProtectedPacket(1, false, !kEntropyFlag);
// Don't send missing packet 2.
ProcessFecPacket(6, 1, false, kEntropyFlag, NULL);
ProcessFecProtectedPacket(3, false, kEntropyFlag);
ProcessFecProtectedPacket(4, false, kEntropyFlag);
ProcessFecProtectedPacket(5, true, !kEntropyFlag);
// Entropy flag should be true, so entropy should be 0.
EXPECT_NE(0u, QuicConnectionPeer::ReceivedEntropyHash(&connection_, 2));
}
TEST_F(QuicConnectionTest, RTO) {
QuicTime default_retransmission_time = clock_.ApproximateNow().Add(
DefaultRetransmissionTime());
SendStreamDataToPeer(1, "foo", 0, !kFin, NULL);
EXPECT_EQ(1u, outgoing_ack()->sent_info.least_unacked);
EXPECT_EQ(1u, last_header()->packet_sequence_number);
EXPECT_EQ(default_retransmission_time,
connection_.GetRetransmissionAlarm()->deadline());
// Simulate the retransmission alarm firing.
clock_.AdvanceTime(DefaultRetransmissionTime());
EXPECT_CALL(*send_algorithm_, OnRetransmissionTimeout());
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(1u, _));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, 2u, _, _, _));
connection_.GetRetransmissionAlarm()->Fire();
EXPECT_EQ(2u, last_header()->packet_sequence_number);
// We do not raise the high water mark yet.
EXPECT_EQ(1u, outgoing_ack()->sent_info.least_unacked);
}
TEST_F(QuicConnectionTest, RTOWithSameEncryptionLevel) {
QuicTime default_retransmission_time = clock_.ApproximateNow().Add(
DefaultRetransmissionTime());
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, new TaggingEncrypter(0x01));
SendStreamDataToPeer(1, "foo", 0, !kFin, NULL);
EXPECT_EQ(0x01010101u, final_bytes_of_last_packet());
connection_.SetEncrypter(ENCRYPTION_INITIAL, new TaggingEncrypter(0x02));
connection_.SetDefaultEncryptionLevel(ENCRYPTION_INITIAL);
SendStreamDataToPeer(1, "foo", 0, !kFin, NULL);
EXPECT_EQ(0x02020202u, final_bytes_of_last_packet());
EXPECT_EQ(default_retransmission_time,
connection_.GetRetransmissionAlarm()->deadline());
{
InSequence s;
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(1, _));
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(2, _));
EXPECT_CALL(*send_algorithm_, OnRetransmissionTimeout());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, 3, _, RTO_RETRANSMISSION, _));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, 4, _, RTO_RETRANSMISSION, _));
}
// Simulate the retransmission alarm firing.
clock_.AdvanceTime(DefaultRetransmissionTime());
connection_.GetRetransmissionAlarm()->Fire();
// Packet should have been sent with ENCRYPTION_NONE.
EXPECT_EQ(0x01010101u, final_bytes_of_previous_packet());
// Packet should have been sent with ENCRYPTION_INITIAL.
EXPECT_EQ(0x02020202u, final_bytes_of_last_packet());
}
TEST_F(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, new TaggingEncrypter(0x01));
// Attempt to send a handshake message while the congestion manager
// does not permit sending.
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, _, _, IS_HANDSHAKE)).WillRepeatedly(
testing::Return(QuicTime::Delta::Infinite()));
connection_.SendStreamDataWithString(1, "foo", 0, !kFin, NULL);
// The packet should be serialized, but not queued.
EXPECT_EQ(1u, connection_.NumQueuedPackets());
// Switch to the new encrypter.
connection_.SetEncrypter(ENCRYPTION_INITIAL, new TaggingEncrypter(0x02));
connection_.SetDefaultEncryptionLevel(ENCRYPTION_INITIAL);
// Now become writeable and flush the packets.
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, _, _, IS_HANDSHAKE)).WillRepeatedly(
testing::Return(QuicTime::Delta::Zero()));
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, final_bytes_of_last_packet());
}
TEST_F(QuicConnectionTest,
DropRetransmitsForNullEncryptedPacketAfterForwardSecure) {
use_tagging_decrypter();
connection_.SetEncrypter(ENCRYPTION_NONE, new TaggingEncrypter(0x01));
QuicPacketSequenceNumber sequence_number;
SendStreamDataToPeer(1, "foo", 0, !kFin, &sequence_number);
connection_.SetEncrypter(ENCRYPTION_FORWARD_SECURE,
new TaggingEncrypter(0x02));
connection_.SetDefaultEncryptionLevel(ENCRYPTION_FORWARD_SECURE);
EXPECT_CALL(*send_algorithm_, OnRetransmissionTimeout());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(0);
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(sequence_number, _)).Times(1);
QuicTime default_retransmission_time = clock_.ApproximateNow().Add(
DefaultRetransmissionTime());
EXPECT_EQ(default_retransmission_time,
connection_.GetRetransmissionAlarm()->deadline());
// Simulate the retransmission alarm firing.
clock_.AdvanceTime(DefaultRetransmissionTime());
connection_.GetRetransmissionAlarm()->Fire();
}
TEST_F(QuicConnectionTest, RetransmitPacketsWithInitialEncryption) {
use_tagging_decrypter();
connection_.SetEncrypter(ENCRYPTION_NONE, new TaggingEncrypter(0x01));
connection_.SetDefaultEncryptionLevel(ENCRYPTION_NONE);
SendStreamDataToPeer(1, "foo", 0, !kFin, NULL);
connection_.SetEncrypter(ENCRYPTION_INITIAL, new TaggingEncrypter(0x02));
connection_.SetDefaultEncryptionLevel(ENCRYPTION_INITIAL);
SendStreamDataToPeer(2, "bar", 0, !kFin, NULL);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(1);
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(_, _)).Times(1);
connection_.RetransmitUnackedPackets(INITIAL_ENCRYPTION_ONLY);
}
TEST_F(QuicConnectionTest, BufferNonDecryptablePackets) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
use_tagging_decrypter();
const uint8 tag = 0x07;
framer_.SetEncrypter(ENCRYPTION_INITIAL, new TaggingEncrypter(tag));
// Process an encrypted packet which can not yet be decrypted
// which should result in the packet being buffered.
ProcessDataPacketAtLevel(1, false, kEntropyFlag, ENCRYPTION_INITIAL);
// Transition to the new encryption state and process another
// encrypted packet which should result in the original packet being
// processed.
connection_.SetDecrypter(new StrictTaggingDecrypter(tag));
connection_.SetDefaultEncryptionLevel(ENCRYPTION_INITIAL);
connection_.SetEncrypter(ENCRYPTION_INITIAL, new TaggingEncrypter(tag));
EXPECT_CALL(visitor_, OnStreamFrames(_)).Times(2).WillRepeatedly(
Return(true));
ProcessDataPacketAtLevel(2, false, kEntropyFlag, ENCRYPTION_INITIAL);
// Finally, process a third packet and note that we do not
// reprocess the buffered packet.
EXPECT_CALL(visitor_, OnStreamFrames(_)).WillOnce(Return(true));
ProcessDataPacketAtLevel(3, false, kEntropyFlag, ENCRYPTION_INITIAL);
}
TEST_F(QuicConnectionTest, TestRetransmitOrder) {
QuicByteCount first_packet_size;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).WillOnce(
DoAll(SaveArg<2>(&first_packet_size), Return(true)));
connection_.SendStreamDataWithString(3, "first_packet", 0, !kFin, NULL);
QuicByteCount second_packet_size;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).WillOnce(
DoAll(SaveArg<2>(&second_packet_size), Return(true)));
connection_.SendStreamDataWithString(3, "second_packet", 12, !kFin, NULL);
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));
EXPECT_CALL(*send_algorithm_, OnRetransmissionTimeout());
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(_, _)).Times(2);
{
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));
EXPECT_CALL(*send_algorithm_, OnRetransmissionTimeout());
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(_, _)).Times(2);
{
InSequence s;
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, first_packet_size, _, _));
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, second_packet_size, _, _));
}
connection_.GetRetransmissionAlarm()->Fire();
}
TEST_F(QuicConnectionTest, RetransmissionCountCalculation) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
QuicPacketSequenceNumber original_sequence_number;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, NOT_RETRANSMISSION, _))
.WillOnce(DoAll(SaveArg<1>(&original_sequence_number), Return(true)));
connection_.SendStreamDataWithString(1, "foo", 0, !kFin, NULL);
EXPECT_TRUE(QuicConnectionPeer::IsSavedForRetransmission(
&connection_, original_sequence_number));
EXPECT_FALSE(QuicConnectionPeer::IsRetransmission(
&connection_, original_sequence_number));
// Force retransmission due to RTO.
clock_.AdvanceTime(QuicTime::Delta::FromSeconds(10));
EXPECT_CALL(*send_algorithm_, OnRetransmissionTimeout());
EXPECT_CALL(*send_algorithm_,
OnPacketAbandoned(original_sequence_number, _)).Times(1);
QuicPacketSequenceNumber rto_sequence_number;
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, RTO_RETRANSMISSION, _))
.WillOnce(DoAll(SaveArg<1>(&rto_sequence_number), Return(true)));
connection_.GetRetransmissionAlarm()->Fire();
EXPECT_FALSE(QuicConnectionPeer::IsSavedForRetransmission(
&connection_, original_sequence_number));
ASSERT_TRUE(QuicConnectionPeer::IsSavedForRetransmission(
&connection_, rto_sequence_number));
EXPECT_TRUE(QuicConnectionPeer::IsRetransmission(
&connection_, rto_sequence_number));
// Once by explicit nack.
EXPECT_CALL(*send_algorithm_, OnPacketLost(_, _)).Times(1);
EXPECT_CALL(*send_algorithm_,
OnPacketAbandoned(rto_sequence_number, _)).Times(1);
QuicPacketSequenceNumber nack_sequence_number = 0;
// Ack packets might generate some other packets, which are not
// retransmissions. (More ack packets).
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, NOT_RETRANSMISSION, _))
.Times(AnyNumber());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, NACK_RETRANSMISSION, _))
.WillOnce(DoAll(SaveArg<1>(&nack_sequence_number), Return(true)));
QuicAckFrame ack(rto_sequence_number, QuicTime::Zero(), 0);
// Ack the retransmitted packet.
ack.received_info.missing_packets.insert(original_sequence_number);
ack.received_info.missing_packets.insert(rto_sequence_number);
ack.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_,
rto_sequence_number - 1) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_,
original_sequence_number);
for (int i = 0; i < 3; i++) {
ProcessAckPacket(&ack);
}
ASSERT_NE(0u, nack_sequence_number);
EXPECT_FALSE(QuicConnectionPeer::IsSavedForRetransmission(
&connection_, rto_sequence_number));
ASSERT_TRUE(QuicConnectionPeer::IsSavedForRetransmission(
&connection_, nack_sequence_number));
EXPECT_TRUE(QuicConnectionPeer::IsRetransmission(
&connection_, nack_sequence_number));
}
TEST_F(QuicConnectionTest, SetRTOAfterWritingToSocket) {
writer_->set_blocked(true);
connection_.SendStreamDataWithString(1, "foo", 0, !kFin, NULL);
// 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_->set_blocked(false);
connection_.OnCanWrite();
EXPECT_TRUE(connection_.GetRetransmissionAlarm()->IsSet());
}
TEST_F(QuicConnectionTest, DelayRTOWithAckReceipt) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, NOT_RETRANSMISSION, _))
.Times(2);
connection_.SendStreamDataWithString(1, "foo", 0, !kFin, NULL);
connection_.SendStreamDataWithString(2, "bar", 0, !kFin, NULL);
QuicAlarm* retransmission_alarm = connection_.GetRetransmissionAlarm();
EXPECT_TRUE(retransmission_alarm->IsSet());
// 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_, OnPacketAcked(_, _, _)).Times(1);
QuicAckFrame ack(1, QuicTime::Zero(), 0);
ack.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 1);
ProcessAckPacket(&ack);
EXPECT_TRUE(retransmission_alarm->IsSet());
// Move forward past the original RTO and ensure the RTO is still pending.
clock_.AdvanceTime(DefaultRetransmissionTime());
// Ensure the second packet gets retransmitted when it finally fires.
EXPECT_TRUE(retransmission_alarm->IsSet());
EXPECT_GE(retransmission_alarm->deadline(), clock_.ApproximateNow());
clock_.AdvanceTime(DefaultRetransmissionTime());
EXPECT_LT(retransmission_alarm->deadline(), clock_.ApproximateNow());
EXPECT_CALL(*send_algorithm_, OnRetransmissionTimeout());
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, RTO_RETRANSMISSION, _));
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(_, _));
// Manually cancel the alarm to simulate a real test.
connection_.GetRetransmissionAlarm()->Fire();
// The new retransmitted sequence number should set the RTO to a larger value
// than previously.
EXPECT_TRUE(retransmission_alarm->IsSet());
QuicTime next_rto_time = retransmission_alarm->deadline();
QuicTime::Delta expected_rto =
connection_.sent_packet_manager().GetRetransmissionDelay();
EXPECT_EQ(next_rto_time, clock_.ApproximateNow().Add(expected_rto));
}
TEST_F(QuicConnectionTest, TestQueued) {
EXPECT_EQ(0u, connection_.NumQueuedPackets());
writer_->set_blocked(true);
connection_.SendStreamDataWithString(1, "foo", 0, !kFin, NULL);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
// Attempt to send all packets, but since we're actually still
// blocked, they should all remain queued.
EXPECT_FALSE(connection_.OnCanWrite());
EXPECT_EQ(1u, connection_.NumQueuedPackets());
// Unblock the writes and actually send.
writer_->set_blocked(false);
EXPECT_TRUE(connection_.OnCanWrite());
EXPECT_EQ(0u, connection_.NumQueuedPackets());
}
TEST_F(QuicConnectionTest, CloseFecGroup) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Don't send missing packet 1.
// Don't send missing packet 2.
ProcessFecProtectedPacket(3, false, !kEntropyFlag);
// Don't send missing FEC packet 3.
ASSERT_EQ(1u, connection_.NumFecGroups());
// Now send non-fec protected ack packet and close the group.
QuicAckFrame frame(0, QuicTime::Zero(), 5);
creator_.set_sequence_number(4);
ProcessAckPacket(&frame);
ASSERT_EQ(0u, connection_.NumFecGroups());
}
TEST_F(QuicConnectionTest, NoQuicCongestionFeedbackFrame) {
SendAckPacketToPeer();
EXPECT_TRUE(last_feedback() == NULL);
}
TEST_F(QuicConnectionTest, WithQuicCongestionFeedbackFrame) {
QuicCongestionFeedbackFrame info;
info.type = kFixRate;
info.fix_rate.bitrate = QuicBandwidth::FromBytesPerSecond(123);
SetFeedback(&info);
SendAckPacketToPeer();
EXPECT_EQ(kFixRate, last_feedback()->type);
EXPECT_EQ(info.fix_rate.bitrate, last_feedback()->fix_rate.bitrate);
}
TEST_F(QuicConnectionTest, UpdateQuicCongestionFeedbackFrame) {
SendAckPacketToPeer();
EXPECT_CALL(*receive_algorithm_, RecordIncomingPacket(_, _, _, _));
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(1);
}
TEST_F(QuicConnectionTest, DontUpdateQuicCongestionFeedbackFrameForRevived) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
SendAckPacketToPeer();
// Process an FEC packet, and revive the missing data packet
// but only contact the receive_algorithm once.
EXPECT_CALL(*receive_algorithm_, RecordIncomingPacket(_, _, _, _));
ProcessFecPacket(2, 1, true, !kEntropyFlag, NULL);
}
TEST_F(QuicConnectionTest, InitialTimeout) {
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_CONNECTION_TIMED_OUT, false));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
QuicTime default_timeout = clock_.ApproximateNow().Add(
QuicTime::Delta::FromSeconds(kDefaultInitialTimeoutSecs));
EXPECT_EQ(default_timeout, connection_.GetTimeoutAlarm()->deadline());
// Simulate the timeout alarm firing.
clock_.AdvanceTime(
QuicTime::Delta::FromSeconds(kDefaultInitialTimeoutSecs));
connection_.GetTimeoutAlarm()->Fire();
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_FALSE(connection_.connected());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
EXPECT_FALSE(connection_.GetResumeWritesAlarm()->IsSet());
EXPECT_FALSE(connection_.GetRetransmissionAlarm()->IsSet());
EXPECT_FALSE(connection_.GetSendAlarm()->IsSet());
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
}
TEST_F(QuicConnectionTest, TimeoutAfterSend) {
EXPECT_TRUE(connection_.connected());
QuicTime default_timeout = clock_.ApproximateNow().Add(
QuicTime::Delta::FromSeconds(kDefaultInitialTimeoutSecs));
// When we send a packet, the timeout will change to 5000 +
// kDefaultInitialTimeoutSecs.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
// Send an ack so we don't set the retransmission alarm.
SendAckPacketToPeer();
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=5000. The alarm will reregister.
clock_.AdvanceTime(QuicTime::Delta::FromMicroseconds(
kDefaultInitialTimeoutSecs * 1000000 - 5000));
EXPECT_EQ(default_timeout, clock_.ApproximateNow());
connection_.GetTimeoutAlarm()->Fire();
EXPECT_TRUE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_TRUE(connection_.connected());
EXPECT_EQ(default_timeout.Add(QuicTime::Delta::FromMilliseconds(5)),
connection_.GetTimeoutAlarm()->deadline());
// This time, we should time out.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_CONNECTION_TIMED_OUT, false));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(5));
EXPECT_EQ(default_timeout.Add(QuicTime::Delta::FromMilliseconds(5)),
clock_.ApproximateNow());
connection_.GetTimeoutAlarm()->Fire();
EXPECT_FALSE(connection_.GetTimeoutAlarm()->IsSet());
EXPECT_FALSE(connection_.connected());
}
// TODO(ianswett): Add scheduler tests when should_retransmit is false.
TEST_F(QuicConnectionTest, SendScheduler) {
// Test that if we send a packet without delay, it is not queued.
QuicPacket* packet = ConstructDataPacket(1, 0, !kEntropyFlag);
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, NOT_RETRANSMISSION, _, _)).WillOnce(
testing::Return(QuicTime::Delta::Zero()));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
connection_.SendPacket(
ENCRYPTION_NONE, 1, packet, kTestEntropyHash, HAS_RETRANSMITTABLE_DATA);
EXPECT_EQ(0u, connection_.NumQueuedPackets());
}
TEST_F(QuicConnectionTest, SendSchedulerDelay) {
// Test that if we send a packet with a delay, it ends up queued.
QuicPacket* packet = ConstructDataPacket(1, 0, !kEntropyFlag);
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, NOT_RETRANSMISSION, _, _)).WillOnce(
testing::Return(QuicTime::Delta::FromMicroseconds(1)));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, 1, _, _, _)).Times(0);
connection_.SendPacket(
ENCRYPTION_NONE, 1, packet, kTestEntropyHash, HAS_RETRANSMITTABLE_DATA);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
}
TEST_F(QuicConnectionTest, SendSchedulerForce) {
// Test that if we force send a packet, it is not queued.
QuicPacket* packet = ConstructDataPacket(1, 0, !kEntropyFlag);
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, NACK_RETRANSMISSION, _, _)).Times(0);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
connection_.SendPacket(
ENCRYPTION_NONE, 1, packet, kTestEntropyHash, HAS_RETRANSMITTABLE_DATA);
// XXX: fixme. was: connection_.SendPacket(1, packet, kForce);
EXPECT_EQ(0u, connection_.NumQueuedPackets());
}
TEST_F(QuicConnectionTest, SendSchedulerEAGAIN) {
QuicPacket* packet = ConstructDataPacket(1, 0, !kEntropyFlag);
writer_->set_blocked(true);
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, NOT_RETRANSMISSION, _, _)).WillOnce(
testing::Return(QuicTime::Delta::Zero()));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, 1, _, _, _)).Times(0);
connection_.SendPacket(
ENCRYPTION_NONE, 1, packet, kTestEntropyHash, HAS_RETRANSMITTABLE_DATA);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
}
TEST_F(QuicConnectionTest, SendSchedulerDelayThenSend) {
// Test that if we send a packet with a delay, it ends up queued.
QuicPacket* packet = ConstructDataPacket(1, 0, !kEntropyFlag);
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, NOT_RETRANSMISSION, _, _)).WillOnce(
testing::Return(QuicTime::Delta::FromMicroseconds(1)));
connection_.SendPacket(
ENCRYPTION_NONE, 1, packet, kTestEntropyHash, HAS_RETRANSMITTABLE_DATA);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
// Advance the clock to fire the alarm, and configure the scheduler
// to permit the packet to be sent.
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, NOT_RETRANSMISSION, _, _)).WillRepeatedly(
testing::Return(QuicTime::Delta::Zero()));
clock_.AdvanceTime(QuicTime::Delta::FromMicroseconds(1));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
connection_.GetSendAlarm()->Fire();
EXPECT_EQ(0u, connection_.NumQueuedPackets());
}
TEST_F(QuicConnectionTest, SendSchedulerDelayThenRetransmit) {
EXPECT_CALL(*send_algorithm_, TimeUntilSend(_, NOT_RETRANSMISSION, _, _))
.WillRepeatedly(testing::Return(QuicTime::Delta::Zero()));
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(1, _)).Times(1);
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, 1, _, NOT_RETRANSMISSION, _));
connection_.SendStreamDataWithString(1, "foo", 0, !kFin, NULL);
EXPECT_EQ(0u, connection_.NumQueuedPackets());
// Advance the time for retransmission of lost packet.
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(501));
// Test that if we send a retransmit with a delay, it ends up queued in the
// sent packet manager, but not yet serialized.
EXPECT_CALL(*send_algorithm_, OnRetransmissionTimeout());
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, RTO_RETRANSMISSION, _, _)).WillOnce(
testing::Return(QuicTime::Delta::FromMicroseconds(1)));
connection_.GetRetransmissionAlarm()->Fire();
EXPECT_EQ(0u, connection_.NumQueuedPackets());
// Advance the clock to fire the alarm, and configure the scheduler
// to permit the packet to be sent.
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, RTO_RETRANSMISSION, _, _)).Times(2).
WillRepeatedly(testing::Return(QuicTime::Delta::Zero()));
// Ensure the scheduler is notified this is a retransmit.
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, _, RTO_RETRANSMISSION, _));
clock_.AdvanceTime(QuicTime::Delta::FromMicroseconds(1));
connection_.GetSendAlarm()->Fire();
EXPECT_EQ(0u, connection_.NumQueuedPackets());
}
TEST_F(QuicConnectionTest, SendSchedulerDelayAndQueue) {
QuicPacket* packet = ConstructDataPacket(1, 0, !kEntropyFlag);
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, NOT_RETRANSMISSION, _, _)).WillOnce(
testing::Return(QuicTime::Delta::FromMicroseconds(1)));
connection_.SendPacket(
ENCRYPTION_NONE, 1, packet, kTestEntropyHash, HAS_RETRANSMITTABLE_DATA);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
// Attempt to send another packet and make sure that it gets queued.
packet = ConstructDataPacket(2, 0, !kEntropyFlag);
connection_.SendPacket(
ENCRYPTION_NONE, 2, packet, kTestEntropyHash, HAS_RETRANSMITTABLE_DATA);
EXPECT_EQ(2u, connection_.NumQueuedPackets());
}
TEST_F(QuicConnectionTest, SendSchedulerDelayThenAckAndSend) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
QuicPacket* packet = ConstructDataPacket(1, 0, !kEntropyFlag);
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, NOT_RETRANSMISSION, _, _)).WillOnce(
testing::Return(QuicTime::Delta::FromMicroseconds(10)));
connection_.SendPacket(
ENCRYPTION_NONE, 1, packet, kTestEntropyHash, HAS_RETRANSMITTABLE_DATA);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
// Now send non-retransmitting information, that we're not going to
// retransmit 3. The far end should stop waiting for it.
QuicAckFrame frame(0, QuicTime::Zero(), 1);
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, NOT_RETRANSMISSION, _, _)).WillRepeatedly(
testing::Return(QuicTime::Delta::Zero()));
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, _, _, _));
ProcessAckPacket(&frame);
EXPECT_EQ(0u, connection_.NumQueuedPackets());
// Ensure alarm is not set
EXPECT_FALSE(connection_.GetSendAlarm()->IsSet());
}
TEST_F(QuicConnectionTest, SendSchedulerDelayThenAckAndHold) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
QuicPacket* packet = ConstructDataPacket(1, 0, !kEntropyFlag);
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, NOT_RETRANSMISSION, _, _)).WillOnce(
testing::Return(QuicTime::Delta::FromMicroseconds(10)));
connection_.SendPacket(
ENCRYPTION_NONE, 1, packet, kTestEntropyHash, HAS_RETRANSMITTABLE_DATA);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
// Now send non-retransmitting information, that we're not going to
// retransmit 3. The far end should stop waiting for it.
QuicAckFrame frame(0, QuicTime::Zero(), 1);
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, NOT_RETRANSMISSION, _, _)).WillOnce(
testing::Return(QuicTime::Delta::FromMicroseconds(1)));
ProcessAckPacket(&frame);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
}
TEST_F(QuicConnectionTest, SendSchedulerDelayThenOnCanWrite) {
QuicPacket* packet = ConstructDataPacket(1, 0, !kEntropyFlag);
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, NOT_RETRANSMISSION, _, _)).WillOnce(
testing::Return(QuicTime::Delta::FromMicroseconds(10)));
connection_.SendPacket(
ENCRYPTION_NONE, 1, packet, kTestEntropyHash, HAS_RETRANSMITTABLE_DATA);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
// OnCanWrite should not send the packet (because of the delay)
// but should still return true.
EXPECT_TRUE(connection_.OnCanWrite());
EXPECT_EQ(1u, connection_.NumQueuedPackets());
}
TEST_F(QuicConnectionTest, TestQueueLimitsOnSendStreamData) {
// All packets carry version info till version is negotiated.
size_t payload_length;
connection_.options()->max_packet_length =
GetPacketLengthForOneStream(
connection_.version(), kIncludeVersion, PACKET_1BYTE_SEQUENCE_NUMBER,
NOT_IN_FEC_GROUP, &payload_length);
// Queue the first packet.
EXPECT_CALL(*send_algorithm_,
TimeUntilSend(_, NOT_RETRANSMISSION, _, _)).WillOnce(
testing::Return(QuicTime::Delta::FromMicroseconds(10)));
const string payload(payload_length, 'a');
EXPECT_EQ(0u,
connection_.SendStreamDataWithString(3, payload, 0,
!kFin, NULL).bytes_consumed);
EXPECT_EQ(0u, connection_.NumQueuedPackets());
}
TEST_F(QuicConnectionTest, LoopThroughSendingPackets) {
// All packets carry version info till version is negotiated.
size_t payload_length;
connection_.options()->max_packet_length =
GetPacketLengthForOneStream(
connection_.version(), kIncludeVersion, PACKET_1BYTE_SEQUENCE_NUMBER,
NOT_IN_FEC_GROUP, &payload_length);
// Queue the first packet.
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(7);
// The first stream frame will consume 2 fewer bytes than the other six.
const string payload(payload_length * 7 - 12, 'a');
EXPECT_EQ(payload.size(),
connection_.SendStreamDataWithString(1, payload, 0,
!kFin, NULL).bytes_consumed);
}
TEST_F(QuicConnectionTest, SendDelayedAckOnTimer) {
QuicTime ack_time = clock_.ApproximateNow().Add(DefaultDelayedAckTime());
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
ProcessPacket(1);
// 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.
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->ack());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
}
TEST_F(QuicConnectionTest, SendDelayedAckOnSecondPacket) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(1);
ProcessPacket(2);
// Check that ack is sent and that delayed ack alarm is reset.
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->ack());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
}
TEST_F(QuicConnectionTest, NoAckOnOldNacks) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Drop one packet, triggering a sequence of acks.
ProcessPacket(2);
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->ack());
writer_->Reset();
ProcessPacket(3);
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->ack());
writer_->Reset();
ProcessPacket(4);
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->ack());
writer_->Reset();
ProcessPacket(5);
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_TRUE(writer_->ack());
// Now only set the timer on the 6th packet, instead of sending another ack.
writer_->Reset();
ProcessPacket(6);
EXPECT_EQ(0u, writer_->frame_count());
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
}
TEST_F(QuicConnectionTest, SendDelayedAckOnOutgoingPacket) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(1);
connection_.SendStreamDataWithString(kStreamId3, "foo", 0, !kFin, NULL);
// Check that ack is bundled with outgoing data and that delayed ack
// alarm is reset.
EXPECT_EQ(2u, writer_->frame_count());
EXPECT_TRUE(writer_->ack());
EXPECT_FALSE(connection_.GetAckAlarm()->IsSet());
}
TEST_F(QuicConnectionTest, DontSendDelayedAckOnOutgoingCryptoPacket) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(1);
connection_.SendStreamDataWithString(kCryptoStreamId, "foo", 0, !kFin, NULL);
// Check that ack is not bundled with outgoing data.
EXPECT_EQ(1u, writer_->frame_count());
EXPECT_FALSE(writer_->ack());
EXPECT_TRUE(connection_.GetAckAlarm()->IsSet());
}
TEST_F(QuicConnectionTest, NoAckForClose) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessPacket(1);
EXPECT_CALL(*send_algorithm_, OnPacketAcked(_, _, _)).Times(0);
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_PEER_GOING_AWAY, true));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _)).Times(0);
ProcessClosePacket(2, 0);
}
TEST_F(QuicConnectionTest, SendWhenDisconnected) {
EXPECT_TRUE(connection_.connected());
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_PEER_GOING_AWAY, false));
connection_.CloseConnection(QUIC_PEER_GOING_AWAY, false);
EXPECT_FALSE(connection_.connected());
QuicPacket* packet = ConstructDataPacket(1, 0, !kEntropyFlag);
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, 1, _, _, _)).Times(0);
connection_.SendPacket(
ENCRYPTION_NONE, 1, packet, kTestEntropyHash, HAS_RETRANSMITTABLE_DATA);
}
TEST_F(QuicConnectionTest, PublicReset) {
QuicPublicResetPacket header;
header.public_header.guid = guid_;
header.public_header.reset_flag = true;
header.public_header.version_flag = false;
header.rejected_sequence_number = 10101;
scoped_ptr<QuicEncryptedPacket> packet(
framer_.BuildPublicResetPacket(header));
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_PUBLIC_RESET, true));
connection_.ProcessUdpPacket(IPEndPoint(), IPEndPoint(), *packet);
}
TEST_F(QuicConnectionTest, GoAway) {
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_F(QuicConnectionTest, InvalidPacket) {
EXPECT_CALL(visitor_,
OnConnectionClosed(QUIC_INVALID_PACKET_HEADER, false));
QuicEncryptedPacket encrypted(NULL, 0);
connection_.ProcessUdpPacket(IPEndPoint(), IPEndPoint(), encrypted);
// The connection close packet should have error details.
ASSERT_TRUE(last_close() != NULL);
EXPECT_EQ("Unable to read public flags.", last_close()->error_details);
}
TEST_F(QuicConnectionTest, MissingPacketsBeforeLeastUnacked) {
QuicAckFrame ack(0, QuicTime::Zero(), 4);
// Set the sequence number of the ack packet to be least unacked (4).
creator_.set_sequence_number(3);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessAckPacket(&ack);
EXPECT_TRUE(outgoing_ack()->received_info.missing_packets.empty());
}
TEST_F(QuicConnectionTest, ReceivedEntropyHashCalculation) {
EXPECT_CALL(visitor_, OnStreamFrames(_)).WillRepeatedly(Return(true));
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessDataPacket(1, 1, kEntropyFlag);
ProcessDataPacket(4, 1, kEntropyFlag);
ProcessDataPacket(3, 1, !kEntropyFlag);
ProcessDataPacket(7, 1, kEntropyFlag);
EXPECT_EQ(146u, outgoing_ack()->received_info.entropy_hash);
}
TEST_F(QuicConnectionTest, UpdateEntropyForReceivedPackets) {
EXPECT_CALL(visitor_, OnStreamFrames(_)).WillRepeatedly(Return(true));
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessDataPacket(1, 1, kEntropyFlag);
ProcessDataPacket(5, 1, kEntropyFlag);
ProcessDataPacket(4, 1, !kEntropyFlag);
EXPECT_EQ(34u, outgoing_ack()->received_info.entropy_hash);
// Make 4th packet my least unacked, and update entropy for 2, 3 packets.
QuicAckFrame ack(0, QuicTime::Zero(), 4);
QuicPacketEntropyHash kRandomEntropyHash = 129u;
ack.sent_info.entropy_hash = kRandomEntropyHash;
creator_.set_sequence_number(5);
QuicPacketEntropyHash six_packet_entropy_hash = 0;
if (ProcessAckPacket(&ack)) {
six_packet_entropy_hash = 1 << 6;
}
EXPECT_EQ((kRandomEntropyHash + (1 << 5) + six_packet_entropy_hash),
outgoing_ack()->received_info.entropy_hash);
}
TEST_F(QuicConnectionTest, UpdateEntropyHashUptoCurrentPacket) {
EXPECT_CALL(visitor_, OnStreamFrames(_)).WillRepeatedly(Return(true));
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessDataPacket(1, 1, kEntropyFlag);
ProcessDataPacket(5, 1, !kEntropyFlag);
ProcessDataPacket(22, 1, kEntropyFlag);
EXPECT_EQ(66u, outgoing_ack()->received_info.entropy_hash);
creator_.set_sequence_number(22);
QuicPacketEntropyHash kRandomEntropyHash = 85u;
// Current packet is the least unacked packet.
QuicAckFrame ack(0, QuicTime::Zero(), 23);
ack.sent_info.entropy_hash = kRandomEntropyHash;
QuicPacketEntropyHash ack_entropy_hash = ProcessAckPacket(&ack);
EXPECT_EQ((kRandomEntropyHash + ack_entropy_hash),
outgoing_ack()->received_info.entropy_hash);
ProcessDataPacket(25, 1, kEntropyFlag);
EXPECT_EQ((kRandomEntropyHash + ack_entropy_hash + (1 << (25 % 8))),
outgoing_ack()->received_info.entropy_hash);
}
TEST_F(QuicConnectionTest, EntropyCalculationForTruncatedAck) {
EXPECT_CALL(visitor_, OnStreamFrames(_)).WillRepeatedly(Return(true));
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
QuicPacketEntropyHash entropy[51];
entropy[0] = 0;
for (int i = 1; i < 51; ++i) {
bool should_send = i % 10 != 0;
bool entropy_flag = (i & (i - 1)) != 0;
if (!should_send) {
entropy[i] = entropy[i - 1];
continue;
}
if (entropy_flag) {
entropy[i] = entropy[i - 1] ^ (1 << (i % 8));
} else {
entropy[i] = entropy[i - 1];
}
ProcessDataPacket(i, 1, entropy_flag);
}
// Till 50 since 50th packet is not sent.
for (int i = 1; i < 50; ++i) {
EXPECT_EQ(entropy[i], QuicConnectionPeer::ReceivedEntropyHash(
&connection_, i));
}
}
TEST_F(QuicConnectionTest, CheckSentEntropyHash) {
creator_.set_sequence_number(1);
SequenceNumberSet missing_packets;
QuicPacketEntropyHash entropy_hash = 0;
QuicPacketSequenceNumber max_sequence_number = 51;
for (QuicPacketSequenceNumber i = 1; i <= max_sequence_number; ++i) {
bool is_missing = i % 10 != 0;
bool entropy_flag = (i & (i - 1)) != 0;
QuicPacketEntropyHash packet_entropy_hash = 0;
if (entropy_flag) {
packet_entropy_hash = 1 << (i % 8);
}
QuicPacket* packet = ConstructDataPacket(i, 0, entropy_flag);
connection_.SendPacket(
ENCRYPTION_NONE, i, packet, packet_entropy_hash,
HAS_RETRANSMITTABLE_DATA);
if (is_missing) {
missing_packets.insert(i);
continue;
}
entropy_hash ^= packet_entropy_hash;
}
EXPECT_TRUE(QuicConnectionPeer::IsValidEntropy(
&connection_, max_sequence_number, missing_packets, entropy_hash))
<< "";
}
TEST_F(QuicConnectionTest, ServerSendsVersionNegotiationPacket) {
framer_.set_version_for_tests(QUIC_VERSION_UNSUPPORTED);
QuicPacketHeader header;
header.public_header.guid = guid_;
header.public_header.reset_flag = false;
header.public_header.version_flag = true;
header.entropy_flag = false;
header.fec_flag = false;
header.packet_sequence_number = 12;
header.fec_group = 0;
QuicFrames frames;
QuicFrame frame(&frame1_);
frames.push_back(frame);
scoped_ptr<QuicPacket> packet(
framer_.BuildUnsizedDataPacket(header, frames).packet);
scoped_ptr<QuicEncryptedPacket> encrypted(
framer_.EncryptPacket(ENCRYPTION_NONE, 12, *packet));
framer_.set_version(QuicVersionMax());
connection_.set_is_server(true);
connection_.ProcessUdpPacket(IPEndPoint(), IPEndPoint(), *encrypted);
EXPECT_TRUE(writer_->version_negotiation_packet() != NULL);
size_t num_versions = arraysize(kSupportedQuicVersions);
EXPECT_EQ(num_versions,
writer_->version_negotiation_packet()->versions.size());
// We expect all versions in kSupportedQuicVersions to be
// included in the packet.
for (size_t i = 0; i < num_versions; ++i) {
EXPECT_EQ(kSupportedQuicVersions[i],
writer_->version_negotiation_packet()->versions[i]);
}
}
TEST_F(QuicConnectionTest, ServerSendsVersionNegotiationPacketSocketBlocked) {
framer_.set_version_for_tests(QUIC_VERSION_UNSUPPORTED);
QuicPacketHeader header;
header.public_header.guid = guid_;
header.public_header.reset_flag = false;
header.public_header.version_flag = true;
header.entropy_flag = false;
header.fec_flag = false;
header.packet_sequence_number = 12;
header.fec_group = 0;
QuicFrames frames;
QuicFrame frame(&frame1_);
frames.push_back(frame);
scoped_ptr<QuicPacket> packet(
framer_.BuildUnsizedDataPacket(header, frames).packet);
scoped_ptr<QuicEncryptedPacket> encrypted(
framer_.EncryptPacket(ENCRYPTION_NONE, 12, *packet));
framer_.set_version(QuicVersionMax());
connection_.set_is_server(true);
writer_->set_blocked(true);
connection_.ProcessUdpPacket(IPEndPoint(), IPEndPoint(), *encrypted);
EXPECT_EQ(0u, writer_->last_packet_size());
EXPECT_TRUE(connection_.HasQueuedData());
EXPECT_TRUE(QuicConnectionPeer::IsWriteBlocked(&connection_));
writer_->set_blocked(false);
connection_.OnCanWrite();
EXPECT_TRUE(writer_->version_negotiation_packet() != NULL);
size_t num_versions = arraysize(kSupportedQuicVersions);
EXPECT_EQ(num_versions,
writer_->version_negotiation_packet()->versions.size());
// We expect all versions in kSupportedQuicVersions to be
// included in the packet.
for (size_t i = 0; i < num_versions; ++i) {
EXPECT_EQ(kSupportedQuicVersions[i],
writer_->version_negotiation_packet()->versions[i]);
}
}
TEST_F(QuicConnectionTest,
ServerSendsVersionNegotiationPacketSocketBlockedDataBuffered) {
framer_.set_version_for_tests(QUIC_VERSION_UNSUPPORTED);
QuicPacketHeader header;
header.public_header.guid = guid_;
header.public_header.reset_flag = false;
header.public_header.version_flag = true;
header.entropy_flag = false;
header.fec_flag = false;
header.packet_sequence_number = 12;
header.fec_group = 0;
QuicFrames frames;
QuicFrame frame(&frame1_);
frames.push_back(frame);
scoped_ptr<QuicPacket> packet(
framer_.BuildUnsizedDataPacket(header, frames).packet);
scoped_ptr<QuicEncryptedPacket> encrypted(
framer_.EncryptPacket(ENCRYPTION_NONE, 12, *packet));
framer_.set_version(QuicVersionMax());
connection_.set_is_server(true);
writer_->set_blocked(true);
writer_->set_is_write_blocked_data_buffered(true);
connection_.ProcessUdpPacket(IPEndPoint(), IPEndPoint(), *encrypted);
EXPECT_EQ(0u, writer_->last_packet_size());
EXPECT_FALSE(connection_.HasQueuedData());
EXPECT_TRUE(QuicConnectionPeer::IsWriteBlocked(&connection_));
}
TEST_F(QuicConnectionTest, ClientHandlesVersionNegotiation) {
// Start out with some unsupported version.
QuicConnectionPeer::GetFramer(&connection_)->set_version_for_tests(
QUIC_VERSION_UNSUPPORTED);
QuicPacketHeader header;
header.public_header.guid = guid_;
header.public_header.reset_flag = false;
header.public_header.version_flag = true;
header.entropy_flag = false;
header.fec_flag = false;
header.packet_sequence_number = 12;
header.fec_group = 0;
QuicVersionVector supported_versions;
for (size_t i = 0; i < arraysize(kSupportedQuicVersions); ++i) {
supported_versions.push_back(kSupportedQuicVersions[i]);
}
// Send a version negotiation packet.
scoped_ptr<QuicEncryptedPacket> encrypted(
framer_.BuildVersionNegotiationPacket(
header.public_header, supported_versions));
connection_.ProcessUdpPacket(IPEndPoint(), IPEndPoint(), *encrypted);
// Now force another packet. The connection should transition into
// NEGOTIATED_VERSION state and tell the packet creator to StopSendingVersion.
header.public_header.version_flag = false;
QuicFrames frames;
QuicFrame frame(&frame1_);
frames.push_back(frame);
scoped_ptr<QuicPacket> packet(
framer_.BuildUnsizedDataPacket(header, frames).packet);
encrypted.reset(framer_.EncryptPacket(ENCRYPTION_NONE, 12, *packet));
EXPECT_CALL(visitor_, OnStreamFrames(_)).Times(1);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
connection_.ProcessUdpPacket(IPEndPoint(), IPEndPoint(), *encrypted);
ASSERT_FALSE(QuicPacketCreatorPeer::SendVersionInPacket(
QuicConnectionPeer::GetPacketCreator(&connection_)));
}
TEST_F(QuicConnectionTest, BadVersionNegotiation) {
QuicPacketHeader header;
header.public_header.guid = guid_;
header.public_header.reset_flag = false;
header.public_header.version_flag = true;
header.entropy_flag = false;
header.fec_flag = false;
header.packet_sequence_number = 12;
header.fec_group = 0;
QuicVersionVector supported_versions;
for (size_t i = 0; i < arraysize(kSupportedQuicVersions); ++i) {
supported_versions.push_back(kSupportedQuicVersions[i]);
}
// 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,
false));
scoped_ptr<QuicEncryptedPacket> encrypted(
framer_.BuildVersionNegotiationPacket(
header.public_header, supported_versions));
connection_.ProcessUdpPacket(IPEndPoint(), IPEndPoint(), *encrypted);
}
TEST_F(QuicConnectionTest, CheckSendStats) {
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, _, NOT_RETRANSMISSION, _));
connection_.SendStreamDataWithString(3, "first", 0, !kFin, NULL);
size_t first_packet_size = last_sent_packet_size();
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, _, NOT_RETRANSMISSION, _));
connection_.SendStreamDataWithString(5, "second", 0, !kFin, NULL);
size_t second_packet_size = last_sent_packet_size();
// 2 retransmissions due to rto, 1 due to explicit nack.
EXPECT_CALL(*send_algorithm_, OnRetransmissionTimeout());
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, _, RTO_RETRANSMISSION, _)).Times(2);
EXPECT_CALL(*send_algorithm_,
OnPacketSent(_, _, _, NACK_RETRANSMISSION, _));
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(_, _)).Times(3);
EXPECT_CALL(visitor_, OnCanWrite()).WillRepeatedly(Return(true));
// Retransmit due to RTO.
clock_.AdvanceTime(QuicTime::Delta::FromSeconds(10));
connection_.GetRetransmissionAlarm()->Fire();
// Retransmit due to explicit nacks.
QuicAckFrame nack_three(4, QuicTime::Zero(), 0);
nack_three.received_info.missing_packets.insert(3);
nack_three.received_info.missing_packets.insert(1);
nack_three.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 4) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 3) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 2) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 1);
QuicFrame frame(&nack_three);
EXPECT_CALL(*send_algorithm_, OnPacketAcked(_, _, _)).Times(1);
EXPECT_CALL(*send_algorithm_, OnPacketLost(_, _)).Times(1);
EXPECT_CALL(visitor_, OnCanWrite()).Times(4).WillRepeatedly(Return(true));
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
ProcessFramePacket(frame);
ProcessFramePacket(frame);
ProcessFramePacket(frame);
EXPECT_CALL(*send_algorithm_, SmoothedRtt()).WillOnce(
Return(QuicTime::Delta::Zero()));
EXPECT_CALL(*send_algorithm_, BandwidthEstimate()).WillOnce(
Return(QuicBandwidth::Zero()));
const QuicConnectionStats& stats = connection_.GetStats();
EXPECT_EQ(3 * first_packet_size + 2 * second_packet_size - kQuicVersionSize,
stats.bytes_sent);
EXPECT_EQ(5u, stats.packets_sent);
EXPECT_EQ(2 * first_packet_size + second_packet_size - kQuicVersionSize,
stats.bytes_retransmitted);
EXPECT_EQ(3u, stats.packets_retransmitted);
EXPECT_EQ(1u, stats.rto_count);
}
TEST_F(QuicConnectionTest, CheckReceiveStats) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
size_t received_bytes = 0;
received_bytes += ProcessFecProtectedPacket(1, false, !kEntropyFlag);
received_bytes += ProcessFecProtectedPacket(3, false, !kEntropyFlag);
// Should be counted against dropped packets.
received_bytes += ProcessDataPacket(3, 1, !kEntropyFlag);
received_bytes += ProcessFecPacket(4, 1, true, !kEntropyFlag, NULL);
EXPECT_CALL(*send_algorithm_, SmoothedRtt()).WillOnce(
Return(QuicTime::Delta::Zero()));
EXPECT_CALL(*send_algorithm_, BandwidthEstimate()).WillOnce(
Return(QuicBandwidth::Zero()));
const QuicConnectionStats& stats = connection_.GetStats();
EXPECT_EQ(received_bytes, stats.bytes_received);
EXPECT_EQ(4u, stats.packets_received);
EXPECT_EQ(1u, stats.packets_revived);
EXPECT_EQ(1u, stats.packets_dropped);
}
TEST_F(QuicConnectionTest, TestFecGroupLimits) {
// Create and return a group for 1.
ASSERT_TRUE(QuicConnectionPeer::GetFecGroup(&connection_, 1) != NULL);
// Create and return a group for 2.
ASSERT_TRUE(QuicConnectionPeer::GetFecGroup(&connection_, 2) != NULL);
// Create and return a group for 4. This should remove 1 but not 2.
ASSERT_TRUE(QuicConnectionPeer::GetFecGroup(&connection_, 4) != NULL);
ASSERT_TRUE(QuicConnectionPeer::GetFecGroup(&connection_, 1) == NULL);
ASSERT_TRUE(QuicConnectionPeer::GetFecGroup(&connection_, 2) != NULL);
// Create and return a group for 3. This will kill off 2.
ASSERT_TRUE(QuicConnectionPeer::GetFecGroup(&connection_, 3) != NULL);
ASSERT_TRUE(QuicConnectionPeer::GetFecGroup(&connection_, 2) == NULL);
// Verify that adding 5 kills off 3, despite 4 being created before 3.
ASSERT_TRUE(QuicConnectionPeer::GetFecGroup(&connection_, 5) != NULL);
ASSERT_TRUE(QuicConnectionPeer::GetFecGroup(&connection_, 4) != NULL);
ASSERT_TRUE(QuicConnectionPeer::GetFecGroup(&connection_, 3) == NULL);
}
TEST_F(QuicConnectionTest, ProcessFramesIfPacketClosedConnection) {
// Construct a packet with stream frame and connection close frame.
header_.public_header.guid = guid_;
header_.packet_sequence_number = 1;
header_.public_header.reset_flag = false;
header_.public_header.version_flag = false;
header_.entropy_flag = false;
header_.fec_flag = false;
header_.fec_group = 0;
QuicConnectionCloseFrame qccf;
qccf.error_code = QUIC_PEER_GOING_AWAY;
QuicFrame close_frame(&qccf);
QuicFrame stream_frame(&frame1_);
QuicFrames frames;
frames.push_back(stream_frame);
frames.push_back(close_frame);
scoped_ptr<QuicPacket> packet(
framer_.BuildUnsizedDataPacket(header_, frames).packet);
EXPECT_TRUE(NULL != packet.get());
scoped_ptr<QuicEncryptedPacket> encrypted(framer_.EncryptPacket(
ENCRYPTION_NONE, 1, *packet));
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_PEER_GOING_AWAY, true));
EXPECT_CALL(visitor_, OnStreamFrames(_)).Times(1);
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
connection_.ProcessUdpPacket(IPEndPoint(), IPEndPoint(), *encrypted);
}
TEST_F(QuicConnectionTest, SelectMutualVersion) {
// 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.
QuicVersionVector supported_versions;
for (size_t i = 0; i < arraysize(kSupportedQuicVersions); ++i) {
supported_versions.push_back(kSupportedQuicVersions[i]);
}
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.
EXPECT_LE(QuicVersionMin(), QuicVersionMax());
QuicVersionVector 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.
QuicVersionVector unsupported_version;
unsupported_version.push_back(QUIC_VERSION_UNSUPPORTED);
EXPECT_FALSE(connection_.SelectMutualVersion(unsupported_version));
}
TEST_F(QuicConnectionTest, ConnectionCloseWhenNotWriteBlocked) {
writer_->set_blocked(false); // Already default.
// Send a packet (but write will not block).
connection_.SendStreamDataWithString(1, "foo", 0, !kFin, NULL);
EXPECT_EQ(0u, connection_.NumQueuedPackets());
EXPECT_EQ(1u, writer_->packets_write_attempts());
// Send an erroneous packet to close the connection.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_INVALID_PACKET_HEADER, false));
ProcessDataPacket(6000, 0, !kEntropyFlag);
EXPECT_EQ(2u, writer_->packets_write_attempts());
}
TEST_F(QuicConnectionTest, ConnectionCloseWhenWriteBlocked) {
EXPECT_EQ(0u, connection_.NumQueuedPackets());
writer_->set_blocked(true);
// Send a packet to so that write will really block.
connection_.SendStreamDataWithString(1, "foo", 0, !kFin, NULL);
EXPECT_EQ(1u, connection_.NumQueuedPackets());
EXPECT_EQ(1u, writer_->packets_write_attempts());
// Send an erroneous packet to close the connection.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_INVALID_PACKET_HEADER, false));
ProcessDataPacket(6000, 0, !kEntropyFlag);
EXPECT_EQ(1u, writer_->packets_write_attempts());
}
TEST_F(QuicConnectionTest, ConnectionCloseWhenNothingPending) {
writer_->set_blocked(true);
// Send an erroneous packet to close the connection.
EXPECT_CALL(visitor_, OnConnectionClosed(QUIC_INVALID_PACKET_HEADER, false));
ProcessDataPacket(6000, 0, !kEntropyFlag);
EXPECT_EQ(1u, writer_->packets_write_attempts());
}
TEST_F(QuicConnectionTest, AckNotifierTriggerCallback) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Create a delegate which we expect to be called.
MockAckNotifierDelegate delegate;
EXPECT_CALL(delegate, OnAckNotification()).Times(1);;
// Send some data, which will register the delegate to be notified.
connection_.SendStreamDataWithString(1, "foo", 0, !kFin, &delegate);
// Process an ACK from the server which should trigger the callback.
EXPECT_CALL(*send_algorithm_, OnPacketAcked(_, _, _)).Times(1);
QuicAckFrame frame(1, QuicTime::Zero(), 0);
frame.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 1);
ProcessAckPacket(&frame);
}
TEST_F(QuicConnectionTest, AckNotifierFailToTriggerCallback) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Create a delegate which we don't expect to be called.
MockAckNotifierDelegate delegate;
EXPECT_CALL(delegate, OnAckNotification()).Times(0);;
EXPECT_CALL(*send_algorithm_, OnPacketAcked(_, _, _)).Times(2);
// Send some data, which will register the delegate to be notified. This will
// not be ACKed and so the delegate should never be called.
connection_.SendStreamDataWithString(1, "foo", 0, !kFin, &delegate);
// Send some other data which we will ACK.
connection_.SendStreamDataWithString(1, "foo", 0, !kFin, NULL);
connection_.SendStreamDataWithString(1, "bar", 0, !kFin, NULL);
// Now we receive ACK for packets 2 and 3, but importantly missing packet 1
// which we registered to be notified about.
QuicAckFrame frame(3, QuicTime::Zero(), 0);
frame.received_info.missing_packets.insert(1);
frame.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 3) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 1);
EXPECT_CALL(*send_algorithm_, OnPacketLost(_, _));
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(_, _));
ProcessAckPacket(&frame);
}
TEST_F(QuicConnectionTest, AckNotifierCallbackAfterRetransmission) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
// Create a delegate which we expect to be called.
MockAckNotifierDelegate delegate;
EXPECT_CALL(delegate, OnAckNotification()).Times(1);;
// In total expect ACKs for all 4 packets.
EXPECT_CALL(*send_algorithm_, OnPacketAcked(_, _, _)).Times(4);
// Send four packets, and register to be notified on ACK of packet 2.
connection_.SendStreamDataWithString(1, "foo", 0, !kFin, NULL);
connection_.SendStreamDataWithString(1, "bar", 0, !kFin, &delegate);
connection_.SendStreamDataWithString(1, "baz", 0, !kFin, NULL);
connection_.SendStreamDataWithString(1, "qux", 0, !kFin, NULL);
// Now we receive ACK for packets 1, 3, and 4, which invokes fast retransmit.
QuicAckFrame frame(4, QuicTime::Zero(), 0);
frame.received_info.missing_packets.insert(2);
frame.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 4) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 2) ^
QuicConnectionPeer::GetSentEntropyHash(&connection_, 1);
EXPECT_CALL(*send_algorithm_, OnPacketLost(2, _));
EXPECT_CALL(*send_algorithm_, OnPacketAbandoned(2, _));
EXPECT_CALL(*send_algorithm_, OnPacketSent(_, _, _, _, _));
ProcessAckPacket(&frame);
// Now we get an ACK for packet 5 (retransmitted packet 2), which should
// trigger the callback.
QuicAckFrame second_ack_frame(5, QuicTime::Zero(), 0);
second_ack_frame.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 5);
ProcessAckPacket(&second_ack_frame);
}
// TODO(rjshade): Add a similar test that FEC recovery on peer (and resulting
// ACK) triggers notification on our end.
TEST_F(QuicConnectionTest, AckNotifierCallbackAfterFECRecovery) {
EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
EXPECT_CALL(visitor_, OnCanWrite()).Times(1).WillOnce(Return(true));
// Create a delegate which we expect to be called.
MockAckNotifierDelegate delegate;
EXPECT_CALL(delegate, OnAckNotification()).Times(1);;
// Expect ACKs for 1 packet.
EXPECT_CALL(*send_algorithm_, OnPacketAcked(_, _, _)).Times(1);
// Send one packet, and register to be notified on ACK.
connection_.SendStreamDataWithString(1, "foo", 0, !kFin, &delegate);
// Ack packet gets dropped, but we receive an FEC packet that covers it.
// Should recover the Ack packet and trigger the notification callback.
QuicFrames frames;
QuicAckFrame ack_frame(1, QuicTime::Zero(), 0);
ack_frame.received_info.entropy_hash =
QuicConnectionPeer::GetSentEntropyHash(&connection_, 1);
frames.push_back(QuicFrame(&ack_frame));
// Dummy stream frame to satisfy expectations set elsewhere.
frames.push_back(QuicFrame(&frame1_));
QuicPacketHeader ack_header;
ack_header.public_header.guid = guid_;
ack_header.public_header.reset_flag = false;
ack_header.public_header.version_flag = false;
ack_header.entropy_flag = !kEntropyFlag;
ack_header.fec_flag = true;
ack_header.packet_sequence_number = 1;
ack_header.is_in_fec_group = IN_FEC_GROUP;
ack_header.fec_group = 1;
QuicPacket* packet =
framer_.BuildUnsizedDataPacket(ack_header, frames).packet;
// Take the packet which contains the ACK frame, and construct and deliver an
// FEC packet which allows the ACK packet to be recovered.
ProcessFecPacket(2, 1, true, !kEntropyFlag, packet);
}
class MockQuicConnectionDebugVisitor
: public QuicConnectionDebugVisitorInterface {
public:
MOCK_METHOD1(OnFrameAddedToPacket,
void(const QuicFrame&));
MOCK_METHOD4(OnPacketSent,
void(QuicPacketSequenceNumber,
EncryptionLevel,
const QuicEncryptedPacket&,
WriteResult));
MOCK_METHOD2(OnPacketRetransmitted,
void(QuicPacketSequenceNumber,
QuicPacketSequenceNumber));
MOCK_METHOD3(OnPacketReceived,
void(const IPEndPoint&,
const IPEndPoint&,
const QuicEncryptedPacket&));
MOCK_METHOD1(OnProtocolVersionMismatch,
void(QuicVersion));
MOCK_METHOD1(OnPacketHeader,
void(const QuicPacketHeader& header));
MOCK_METHOD1(OnStreamFrame,
void(const QuicStreamFrame&));
MOCK_METHOD1(OnAckFrame,
void(const QuicAckFrame& frame));
MOCK_METHOD1(OnCongestionFeedbackFrame,
void(const QuicCongestionFeedbackFrame&));
MOCK_METHOD1(OnRstStreamFrame,
void(const QuicRstStreamFrame&));
MOCK_METHOD1(OnConnectionCloseFrame,
void(const QuicConnectionCloseFrame&));
MOCK_METHOD1(OnPublicResetPacket,
void(const QuicPublicResetPacket&));
MOCK_METHOD1(OnVersionNegotiationPacket,
void(const QuicVersionNegotiationPacket&));
MOCK_METHOD2(OnRevivedPacket,
void(const QuicPacketHeader&, StringPiece payload));
};
TEST_F(QuicConnectionTest, OnPacketHeaderDebugVisitor) {
QuicPacketHeader header;
scoped_ptr<MockQuicConnectionDebugVisitor>
debug_visitor(new StrictMock<MockQuicConnectionDebugVisitor>);
connection_.set_debug_visitor(debug_visitor.get());
EXPECT_CALL(*debug_visitor, OnPacketHeader(Ref(header))).Times(1);
connection_.OnPacketHeader(header);
}
TEST_F(QuicConnectionTest, Pacing) {
ValueRestore<bool> old_flag(&FLAGS_enable_quic_pacing, true);
TestConnection server(guid_, IPEndPoint(), helper_.get(), writer_.get(),
true);
TestConnection client(guid_, IPEndPoint(), helper_.get(), writer_.get(),
false);
EXPECT_TRUE(client.sent_packet_manager().using_pacing());
EXPECT_FALSE(server.sent_packet_manager().using_pacing());
}
} // namespace
} // namespace test
} // namespace net