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* Copyright 2016 The WebRTC Project Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
#include "webrtc/p2p/quic/reliablequicstream.h"
#include <memory>
#include <string>
#include "net/base/ip_address_number.h"
#include "net/quic/quic_connection.h"
#include "net/quic/quic_protocol.h"
#include "net/quic/quic_session.h"
#include "webrtc/base/buffer.h"
#include "webrtc/base/gunit.h"
#include "webrtc/base/sigslot.h"
#include "webrtc/base/stream.h"
#include "webrtc/p2p/quic/quicconnectionhelper.h"
using cricket::QuicConnectionHelper;
using cricket::ReliableQuicStream;
using net::IPAddress;
using net::IPEndPoint;
using net::PerPacketOptions;
using net::Perspective;
using net::QuicAckListenerInterface;
using net::QuicConfig;
using net::QuicConnection;
using net::QuicConsumedData;
using net::QuicCryptoStream;
using net::QuicErrorCode;
using net::QuicIOVector;
using net::QuicPacketWriter;
using net::QuicRstStreamErrorCode;
using net::QuicSession;
using net::QuicStreamId;
using net::QuicStreamOffset;
using net::SpdyPriority;
using rtc::SR_SUCCESS;
using rtc::SR_BLOCK;
// Arbitrary number for a stream's write blocked priority.
static const SpdyPriority kDefaultPriority = 3;
// QuicSession that does not create streams and writes data from
// ReliableQuicStream to a string.
class MockQuicSession : public QuicSession {
MockQuicSession(QuicConnection* connection,
const QuicConfig& config,
std::string* write_buffer)
: QuicSession(connection, config), write_buffer_(write_buffer) {}
// Writes outgoing data from ReliableQuicStream to a string.
QuicConsumedData WritevData(
QuicStreamId id,
QuicIOVector iovector,
QuicStreamOffset offset,
bool fin,
QuicAckListenerInterface* ack_notifier_delegate) override {
if (!writable_) {
return QuicConsumedData(0, false);
const char* data = reinterpret_cast<const char*>(iovector.iov->iov_base);
size_t len = iovector.total_length;
write_buffer_->append(data, len);
return QuicConsumedData(len, false);
net::ReliableQuicStream* CreateIncomingDynamicStream(
QuicStreamId id) override {
return nullptr;
net::ReliableQuicStream* CreateOutgoingDynamicStream(
SpdyPriority priority) override {
return nullptr;
QuicCryptoStream* GetCryptoStream() override { return nullptr; }
// Called by ReliableQuicStream when they want to close stream.
void SendRstStream(QuicStreamId id,
QuicRstStreamErrorCode error,
QuicStreamOffset bytes_written) override {}
// Sets whether data is written to buffer, or else if this is write blocked.
void set_writable(bool writable) { writable_ = writable; }
// Tracks whether the stream is write blocked and its priority.
void register_write_blocked_stream(QuicStreamId stream_id,
SpdyPriority priority) {
write_blocked_streams()->RegisterStream(stream_id, priority);
// Stores written data from ReliableQuicStream.
std::string* write_buffer_;
// Whether data is written to write_buffer_.
bool writable_ = true;
// Packet writer that does nothing. This is required for QuicConnection but
// isn't used for writing data.
class DummyPacketWriter : public QuicPacketWriter {
DummyPacketWriter() {}
// QuicPacketWriter overrides.
net::WriteResult WritePacket(const char* buffer,
size_t buf_len,
const IPAddress& self_address,
const IPEndPoint& peer_address,
PerPacketOptions* options) override {
return net::WriteResult(net::WRITE_STATUS_ERROR, 0);
bool IsWriteBlockedDataBuffered() const override { return false; }
bool IsWriteBlocked() const override { return false; };
void SetWritable() override {}
net::QuicByteCount GetMaxPacketSize(
const net::IPEndPoint& peer_address) const override {
return 0;
class ReliableQuicStreamTest : public ::testing::Test,
public sigslot::has_slots<> {
ReliableQuicStreamTest() {}
void CreateReliableQuicStream() {
const net::QuicStreamId kStreamId = 5;
// Arbitrary values for QuicConnection.
QuicConnectionHelper* quic_helper =
new QuicConnectionHelper(rtc::Thread::Current());
Perspective perspective = Perspective::IS_SERVER;
net::IPAddress ip(0, 0, 0, 0);
bool owns_writer = true;
QuicConnection* connection = new QuicConnection(
0, IPEndPoint(ip, 0), quic_helper, new DummyPacketWriter(), owns_writer,
perspective, net::QuicSupportedVersions());
new MockQuicSession(connection, QuicConfig(), &write_buffer_));
stream_.reset(new ReliableQuicStream(kStreamId, session_.get()));
this, &ReliableQuicStreamTest::OnDataReceived);
stream_->SignalClosed.connect(this, &ReliableQuicStreamTest::OnClosed);
this, &ReliableQuicStreamTest::OnQueuedBytesWritten);
session_->register_write_blocked_stream(stream_->id(), kDefaultPriority);
void OnDataReceived(QuicStreamId id, const char* data, size_t length) {
ASSERT_EQ(id, stream_->id());
read_buffer_.append(data, length);
void OnClosed(QuicStreamId id, int err) { closed_ = true; }
void OnQueuedBytesWritten(QuicStreamId id, uint64_t queued_bytes_written) {
queued_bytes_written_ = queued_bytes_written;
std::unique_ptr<ReliableQuicStream> stream_;
std::unique_ptr<MockQuicSession> session_;
// Data written by the ReliableQuicStream.
std::string write_buffer_;
// Data read by the ReliableQuicStream.
std::string read_buffer_;
// Whether the ReliableQuicStream is closed.
bool closed_ = false;
// Bytes written by OnCanWrite().
uint64_t queued_bytes_written_;
// Write an entire string.
TEST_F(ReliableQuicStreamTest, WriteDataWhole) {
EXPECT_EQ(SR_SUCCESS, stream_->Write("Foo bar", 7));
EXPECT_EQ("Foo bar", write_buffer_);
// Write part of a string.
TEST_F(ReliableQuicStreamTest, WriteDataPartial) {
EXPECT_EQ(SR_SUCCESS, stream_->Write("Hello, World!", 8));
EXPECT_EQ("Hello, W", write_buffer_);
// Test that strings are buffered correctly.
TEST_F(ReliableQuicStreamTest, BufferData) {
EXPECT_EQ(SR_BLOCK, stream_->Write("Foo bar", 7));
EXPECT_EQ(0ul, write_buffer_.size());
EXPECT_EQ(7ul, queued_bytes_written_);
EXPECT_EQ("Foo bar", write_buffer_);
EXPECT_EQ(SR_SUCCESS, stream_->Write("xyzzy", 5));
EXPECT_EQ("Foo barxyzzy", write_buffer_);
// Read an entire string.
TEST_F(ReliableQuicStreamTest, ReadDataWhole) {
net::QuicStreamFrame frame(-1, false, 0, "Hello, World!");
EXPECT_EQ("Hello, World!", read_buffer_);
// Read part of a string.
TEST_F(ReliableQuicStreamTest, ReadDataPartial) {
net::QuicStreamFrame frame(-1, false, 0, "Hello, World!");
frame.frame_length = 5;
EXPECT_EQ("Hello", read_buffer_);
// Test that closing the stream results in a callback.
TEST_F(ReliableQuicStreamTest, CloseStream) {