357 lines
14 KiB
C++
357 lines
14 KiB
C++
/*
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* Copyright 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/api/quicdatatransport.h"
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#include <memory>
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#include <set>
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#include <string>
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#include <unordered_map>
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#include <vector>
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#include "webrtc/api/quicdatachannel.h"
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#include "webrtc/base/bytebuffer.h"
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#include "webrtc/base/gunit.h"
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#include "webrtc/p2p/base/faketransportcontroller.h"
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#include "webrtc/p2p/quic/quictransportchannel.h"
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#include "webrtc/p2p/quic/reliablequicstream.h"
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using webrtc::DataBuffer;
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using webrtc::DataChannelInit;
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using webrtc::DataChannelInterface;
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using webrtc::DataChannelObserver;
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using webrtc::QuicDataChannel;
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using webrtc::QuicDataTransport;
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using cricket::FakeTransportChannel;
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using cricket::QuicTransportChannel;
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using cricket::ReliableQuicStream;
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namespace {
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// Timeout for asynchronous operations.
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static const int kTimeoutMs = 1000; // milliseconds
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// FakeObserver receives messages from the data channel.
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class FakeObserver : public DataChannelObserver {
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public:
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FakeObserver() {}
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void OnStateChange() override {}
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void OnBufferedAmountChange(uint64_t previous_amount) override {}
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void OnMessage(const webrtc::DataBuffer& buffer) override {
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messages_.push_back(std::string(buffer.data.data<char>(), buffer.size()));
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}
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const std::vector<std::string>& messages() const { return messages_; }
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size_t messages_received() const { return messages_.size(); }
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private:
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std::vector<std::string> messages_;
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};
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// A peer who uses a QUIC transport channel and fake ICE transport channel to
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// send or receive data.
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class QuicDataTransportPeer {
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public:
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QuicDataTransportPeer()
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: quic_data_transport_(rtc::Thread::Current(), rtc::Thread::Current()),
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ice_transport_channel_(new FakeTransportChannel("data", 0)),
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quic_transport_channel_(ice_transport_channel_) {
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ice_transport_channel_->SetAsync(true);
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}
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void GenerateCertificateAndFingerprint() {
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rtc::scoped_refptr<rtc::RTCCertificate> local_cert =
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rtc::RTCCertificate::Create(std::unique_ptr<rtc::SSLIdentity>(
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rtc::SSLIdentity::Generate("cert_name", rtc::KT_DEFAULT)));
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quic_transport_channel_.SetLocalCertificate(local_cert);
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local_fingerprint_.reset(CreateFingerprint(local_cert.get()));
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}
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// Connects |ice_transport_channel_| to that of the other peer.
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void Connect(QuicDataTransportPeer* other_peer) {
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ice_transport_channel_->Connect();
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other_peer->ice_transport_channel_->Connect();
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ice_transport_channel_->SetDestination(other_peer->ice_transport_channel_);
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}
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std::unique_ptr<rtc::SSLFingerprint>& local_fingerprint() {
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return local_fingerprint_;
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}
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QuicTransportChannel* quic_transport_channel() {
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return &quic_transport_channel_;
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}
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// Write a messge directly to the ReliableQuicStream.
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void WriteMessage(int data_channel_id,
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uint64_t message_id,
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const std::string& message) {
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ReliableQuicStream* stream = quic_transport_channel_.CreateQuicStream();
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rtc::CopyOnWriteBuffer payload;
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webrtc::WriteQuicDataChannelMessageHeader(data_channel_id, message_id,
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&payload);
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stream->Write(payload.data<char>(), payload.size(), false);
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stream->Write(message.data(), message.size(), true);
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}
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rtc::scoped_refptr<DataChannelInterface> CreateDataChannel(
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const DataChannelInit* config) {
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return quic_data_transport_.CreateDataChannel("testing", config);
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}
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QuicDataTransport* quic_data_transport() { return &quic_data_transport_; }
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private:
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// Creates a fingerprint from a certificate.
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rtc::SSLFingerprint* CreateFingerprint(rtc::RTCCertificate* cert) {
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std::string digest_algorithm;
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cert->ssl_certificate().GetSignatureDigestAlgorithm(&digest_algorithm);
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std::unique_ptr<rtc::SSLFingerprint> fingerprint(
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rtc::SSLFingerprint::Create(digest_algorithm, cert->identity()));
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return fingerprint.release();
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}
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QuicDataTransport quic_data_transport_;
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FakeTransportChannel* ice_transport_channel_;
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QuicTransportChannel quic_transport_channel_;
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std::unique_ptr<rtc::SSLFingerprint> local_fingerprint_;
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};
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class QuicDataTransportTest : public testing::Test {
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public:
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QuicDataTransportTest() {}
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void ConnectTransportChannels() {
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SetCryptoParameters();
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peer1_.Connect(&peer2_);
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ASSERT_TRUE_WAIT(peer1_.quic_transport_channel()->writable() &&
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peer2_.quic_transport_channel()->writable(),
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kTimeoutMs);
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}
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void SetTransportChannels() {
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ASSERT_TRUE(peer1_.quic_data_transport()->SetTransportChannel(
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peer1_.quic_transport_channel()));
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ASSERT_TRUE(peer2_.quic_data_transport()->SetTransportChannel(
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peer2_.quic_transport_channel()));
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}
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// Sets crypto parameters required for the QUIC handshake.
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void SetCryptoParameters() {
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peer1_.GenerateCertificateAndFingerprint();
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peer2_.GenerateCertificateAndFingerprint();
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peer1_.quic_transport_channel()->SetSslRole(rtc::SSL_CLIENT);
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peer2_.quic_transport_channel()->SetSslRole(rtc::SSL_SERVER);
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std::unique_ptr<rtc::SSLFingerprint>& peer1_fingerprint =
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peer1_.local_fingerprint();
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std::unique_ptr<rtc::SSLFingerprint>& peer2_fingerprint =
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peer2_.local_fingerprint();
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peer1_.quic_transport_channel()->SetRemoteFingerprint(
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peer2_fingerprint->algorithm,
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reinterpret_cast<const uint8_t*>(peer2_fingerprint->digest.data()),
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peer2_fingerprint->digest.size());
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peer2_.quic_transport_channel()->SetRemoteFingerprint(
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peer1_fingerprint->algorithm,
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reinterpret_cast<const uint8_t*>(peer1_fingerprint->digest.data()),
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peer1_fingerprint->digest.size());
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}
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protected:
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QuicDataTransportPeer peer1_;
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QuicDataTransportPeer peer2_;
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};
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// Tests creation and destruction of data channels.
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TEST_F(QuicDataTransportTest, CreateAndDestroyDataChannels) {
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QuicDataTransport* quic_data_transport = peer2_.quic_data_transport();
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EXPECT_FALSE(quic_data_transport->HasDataChannels());
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for (int data_channel_id = 0; data_channel_id < 5; ++data_channel_id) {
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EXPECT_FALSE(quic_data_transport->HasDataChannel(data_channel_id));
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webrtc::DataChannelInit config;
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config.id = data_channel_id;
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rtc::scoped_refptr<DataChannelInterface> data_channel =
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peer2_.CreateDataChannel(&config);
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EXPECT_NE(nullptr, data_channel);
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EXPECT_EQ(data_channel_id, data_channel->id());
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EXPECT_TRUE(quic_data_transport->HasDataChannel(data_channel_id));
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}
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EXPECT_TRUE(quic_data_transport->HasDataChannels());
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for (int data_channel_id = 0; data_channel_id < 5; ++data_channel_id) {
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quic_data_transport->DestroyDataChannel(data_channel_id);
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EXPECT_FALSE(quic_data_transport->HasDataChannel(data_channel_id));
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}
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EXPECT_FALSE(quic_data_transport->HasDataChannels());
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}
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// Tests that the QuicDataTransport does not allow creating multiple
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// QuicDataChannels with the same id.
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TEST_F(QuicDataTransportTest, CannotCreateDataChannelsWithSameId) {
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webrtc::DataChannelInit config;
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config.id = 2;
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EXPECT_NE(nullptr, peer2_.CreateDataChannel(&config));
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EXPECT_EQ(nullptr, peer2_.CreateDataChannel(&config));
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}
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// Tests that any data channels created by the QuicDataTransport are in state
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// kConnecting before the QuicTransportChannel is set, then transiton to state
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// kOpen when the transport channel becomes writable.
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TEST_F(QuicDataTransportTest, DataChannelsOpenWhenTransportChannelWritable) {
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webrtc::DataChannelInit config1;
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config1.id = 7;
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rtc::scoped_refptr<DataChannelInterface> data_channel1 =
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peer2_.CreateDataChannel(&config1);
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EXPECT_EQ(webrtc::DataChannelInterface::kConnecting, data_channel1->state());
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SetTransportChannels();
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EXPECT_EQ(webrtc::DataChannelInterface::kConnecting, data_channel1->state());
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webrtc::DataChannelInit config2;
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config2.id = 14;
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rtc::scoped_refptr<DataChannelInterface> data_channel2 =
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peer2_.CreateDataChannel(&config2);
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EXPECT_EQ(webrtc::DataChannelInterface::kConnecting, data_channel2->state());
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// Existing data channels should open once the transport channel is writable.
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ConnectTransportChannels();
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EXPECT_EQ_WAIT(webrtc::DataChannelInterface::kOpen, data_channel1->state(),
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kTimeoutMs);
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EXPECT_EQ_WAIT(webrtc::DataChannelInterface::kOpen, data_channel2->state(),
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kTimeoutMs);
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// Any data channels created afterwards should start in state kOpen.
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webrtc::DataChannelInit config3;
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config3.id = 21;
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rtc::scoped_refptr<DataChannelInterface> data_channel3 =
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peer2_.CreateDataChannel(&config3);
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EXPECT_EQ(webrtc::DataChannelInterface::kOpen, data_channel3->state());
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}
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// Tests that the QuicTransport dispatches messages for one QuicDataChannel.
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TEST_F(QuicDataTransportTest, ReceiveMessagesForSingleDataChannel) {
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ConnectTransportChannels();
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SetTransportChannels();
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int data_channel_id = 1337;
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webrtc::DataChannelInit config;
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config.id = data_channel_id;
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rtc::scoped_refptr<DataChannelInterface> peer2_data_channel =
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peer2_.CreateDataChannel(&config);
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FakeObserver observer;
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peer2_data_channel->RegisterObserver(&observer);
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uint64_t message1_id = 26u;
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peer1_.WriteMessage(data_channel_id, message1_id, "Testing");
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ASSERT_EQ_WAIT(1, observer.messages_received(), kTimeoutMs);
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EXPECT_EQ("Testing", observer.messages()[0]);
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uint64_t message2_id = 402u;
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peer1_.WriteMessage(data_channel_id, message2_id, "Hello, World!");
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ASSERT_EQ_WAIT(2, observer.messages_received(), kTimeoutMs);
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EXPECT_EQ("Hello, World!", observer.messages()[1]);
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uint64_t message3_id = 100260415u;
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peer1_.WriteMessage(data_channel_id, message3_id, "Third message");
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ASSERT_EQ_WAIT(3, observer.messages_received(), kTimeoutMs);
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EXPECT_EQ("Third message", observer.messages()[2]);
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}
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// Tests that the QuicTransport dispatches messages to the correct data channel
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// when multiple are in use.
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TEST_F(QuicDataTransportTest, ReceiveMessagesForMultipleDataChannels) {
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ConnectTransportChannels();
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SetTransportChannels();
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std::vector<rtc::scoped_refptr<DataChannelInterface>> data_channels;
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for (int data_channel_id = 0; data_channel_id < 5; ++data_channel_id) {
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webrtc::DataChannelInit config;
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config.id = data_channel_id;
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data_channels.push_back(peer2_.CreateDataChannel(&config));
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}
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for (int data_channel_id = 0; data_channel_id < 5; ++data_channel_id) {
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uint64_t message1_id = 48023u;
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FakeObserver observer;
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DataChannelInterface* peer2_data_channel =
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data_channels[data_channel_id].get();
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peer2_data_channel->RegisterObserver(&observer);
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peer1_.WriteMessage(data_channel_id, message1_id, "Testing");
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ASSERT_EQ_WAIT(1, observer.messages_received(), kTimeoutMs);
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EXPECT_EQ("Testing", observer.messages()[0]);
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uint64_t message2_id = 1372643095u;
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peer1_.WriteMessage(data_channel_id, message2_id, "Hello, World!");
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ASSERT_EQ_WAIT(2, observer.messages_received(), kTimeoutMs);
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EXPECT_EQ("Hello, World!", observer.messages()[1]);
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}
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}
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// Tests end-to-end that both peers can use multiple QuicDataChannels to
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// send/receive messages using a QuicDataTransport.
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TEST_F(QuicDataTransportTest, EndToEndSendReceiveMessages) {
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ConnectTransportChannels();
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SetTransportChannels();
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std::vector<rtc::scoped_refptr<DataChannelInterface>> peer1_data_channels;
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std::vector<rtc::scoped_refptr<DataChannelInterface>> peer2_data_channels;
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for (int data_channel_id = 0; data_channel_id < 5; ++data_channel_id) {
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webrtc::DataChannelInit config;
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config.id = data_channel_id;
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peer1_data_channels.push_back(peer1_.CreateDataChannel(&config));
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peer2_data_channels.push_back(peer2_.CreateDataChannel(&config));
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}
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for (int data_channel_id = 0; data_channel_id < 5; ++data_channel_id) {
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DataChannelInterface* peer1_data_channel =
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peer1_data_channels[data_channel_id].get();
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FakeObserver observer1;
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peer1_data_channel->RegisterObserver(&observer1);
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DataChannelInterface* peer2_data_channel =
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peer2_data_channels[data_channel_id].get();
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FakeObserver observer2;
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peer2_data_channel->RegisterObserver(&observer2);
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peer1_data_channel->Send(webrtc::DataBuffer("Peer 1 message 1"));
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ASSERT_EQ_WAIT(1, observer2.messages_received(), kTimeoutMs);
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EXPECT_EQ("Peer 1 message 1", observer2.messages()[0]);
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peer1_data_channel->Send(webrtc::DataBuffer("Peer 1 message 2"));
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ASSERT_EQ_WAIT(2, observer2.messages_received(), kTimeoutMs);
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EXPECT_EQ("Peer 1 message 2", observer2.messages()[1]);
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peer2_data_channel->Send(webrtc::DataBuffer("Peer 2 message 1"));
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ASSERT_EQ_WAIT(1, observer1.messages_received(), kTimeoutMs);
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EXPECT_EQ("Peer 2 message 1", observer1.messages()[0]);
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peer2_data_channel->Send(webrtc::DataBuffer("Peer 2 message 2"));
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ASSERT_EQ_WAIT(2, observer1.messages_received(), kTimeoutMs);
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EXPECT_EQ("Peer 2 message 2", observer1.messages()[1]);
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}
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}
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// Tests that SetTransportChannel returns false when setting a NULL transport
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// channel or a transport channel that is not equivalent to the one already set.
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TEST_F(QuicDataTransportTest, SetTransportChannelReturnValue) {
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QuicDataTransport* quic_data_transport = peer1_.quic_data_transport();
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EXPECT_FALSE(quic_data_transport->SetTransportChannel(nullptr));
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QuicTransportChannel* transport_channel = peer1_.quic_transport_channel();
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EXPECT_TRUE(quic_data_transport->SetTransportChannel(transport_channel));
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EXPECT_TRUE(quic_data_transport->SetTransportChannel(transport_channel));
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QuicTransportChannel* other_transport_channel =
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peer2_.quic_transport_channel();
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EXPECT_FALSE(
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quic_data_transport->SetTransportChannel(other_transport_channel));
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}
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} // namespace
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