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/*
* Copyright (c) 2012 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 "media/base/rtp_data_engine.h"
#include <string.h>
#include <memory>
#include <string>
#include "media/base/fake_network_interface.h"
#include "media/base/media_constants.h"
#include "media/base/rtp_utils.h"
#include "rtc_base/copy_on_write_buffer.h"
#include "rtc_base/fake_clock.h"
#include "rtc_base/third_party/sigslot/sigslot.h"
#include "rtc_base/time_utils.h"
#include "test/gtest.h"
class FakeDataReceiver : public sigslot::has_slots<> {
public:
FakeDataReceiver() : has_received_data_(false) {}
void OnDataReceived(const cricket::ReceiveDataParams& params,
const char* data,
size_t len) {
has_received_data_ = true;
last_received_data_ = std::string(data, len);
last_received_data_len_ = len;
last_received_data_params_ = params;
}
bool has_received_data() const { return has_received_data_; }
std::string last_received_data() const { return last_received_data_; }
size_t last_received_data_len() const { return last_received_data_len_; }
cricket::ReceiveDataParams last_received_data_params() const {
return last_received_data_params_;
}
private:
bool has_received_data_;
std::string last_received_data_;
size_t last_received_data_len_;
cricket::ReceiveDataParams last_received_data_params_;
};
class RtpDataMediaChannelTest : public ::testing::Test {
protected:
virtual void SetUp() {
// Seed needed for each test to satisfy expectations.
iface_.reset(new cricket::FakeNetworkInterface());
dme_.reset(CreateEngine());
receiver_.reset(new FakeDataReceiver());
}
void SetNow(double now) { clock_.SetTime(webrtc::Timestamp::seconds(now)); }
cricket::RtpDataEngine* CreateEngine() {
cricket::RtpDataEngine* dme = new cricket::RtpDataEngine();
return dme;
}
cricket::RtpDataMediaChannel* CreateChannel() {
return CreateChannel(dme_.get());
}
cricket::RtpDataMediaChannel* CreateChannel(cricket::RtpDataEngine* dme) {
cricket::MediaConfig config;
cricket::RtpDataMediaChannel* channel =
static_cast<cricket::RtpDataMediaChannel*>(dme->CreateChannel(config));
channel->SetInterface(iface_.get(), webrtc::MediaTransportConfig());
channel->SignalDataReceived.connect(receiver_.get(),
&FakeDataReceiver::OnDataReceived);
return channel;
}
FakeDataReceiver* receiver() { return receiver_.get(); }
bool HasReceivedData() { return receiver_->has_received_data(); }
std::string GetReceivedData() { return receiver_->last_received_data(); }
size_t GetReceivedDataLen() { return receiver_->last_received_data_len(); }
cricket::ReceiveDataParams GetReceivedDataParams() {
return receiver_->last_received_data_params();
}
bool HasSentData(int count) { return (iface_->NumRtpPackets() > count); }
std::string GetSentData(int index) {
// Assume RTP header of length 12
std::unique_ptr<const rtc::CopyOnWriteBuffer> packet(
iface_->GetRtpPacket(index));
if (packet->size() > 12) {
return std::string(packet->data<char>() + 12, packet->size() - 12);
} else {
return "";
}
}
cricket::RtpHeader GetSentDataHeader(int index) {
std::unique_ptr<const rtc::CopyOnWriteBuffer> packet(
iface_->GetRtpPacket(index));
cricket::RtpHeader header;
GetRtpHeader(packet->data(), packet->size(), &header);
return header;
}
private:
std::unique_ptr<cricket::RtpDataEngine> dme_;
rtc::ScopedFakeClock clock_;
std::unique_ptr<cricket::FakeNetworkInterface> iface_;
std::unique_ptr<FakeDataReceiver> receiver_;
};
TEST_F(RtpDataMediaChannelTest, SetUnknownCodecs) {
std::unique_ptr<cricket::RtpDataMediaChannel> dmc(CreateChannel());
cricket::DataCodec known_codec;
known_codec.id = 103;
known_codec.name = "google-data";
cricket::DataCodec unknown_codec;
unknown_codec.id = 104;
unknown_codec.name = "unknown-data";
cricket::DataSendParameters send_parameters_known;
send_parameters_known.codecs.push_back(known_codec);
cricket::DataRecvParameters recv_parameters_known;
recv_parameters_known.codecs.push_back(known_codec);
cricket::DataSendParameters send_parameters_unknown;
send_parameters_unknown.codecs.push_back(unknown_codec);
cricket::DataRecvParameters recv_parameters_unknown;
recv_parameters_unknown.codecs.push_back(unknown_codec);
cricket::DataSendParameters send_parameters_mixed;
send_parameters_mixed.codecs.push_back(known_codec);
send_parameters_mixed.codecs.push_back(unknown_codec);
cricket::DataRecvParameters recv_parameters_mixed;
recv_parameters_mixed.codecs.push_back(known_codec);
recv_parameters_mixed.codecs.push_back(unknown_codec);
EXPECT_TRUE(dmc->SetSendParameters(send_parameters_known));
EXPECT_FALSE(dmc->SetSendParameters(send_parameters_unknown));
EXPECT_TRUE(dmc->SetSendParameters(send_parameters_mixed));
EXPECT_TRUE(dmc->SetRecvParameters(recv_parameters_known));
EXPECT_FALSE(dmc->SetRecvParameters(recv_parameters_unknown));
EXPECT_FALSE(dmc->SetRecvParameters(recv_parameters_mixed));
}
TEST_F(RtpDataMediaChannelTest, AddRemoveSendStream) {
std::unique_ptr<cricket::RtpDataMediaChannel> dmc(CreateChannel());
cricket::StreamParams stream1;
stream1.add_ssrc(41);
EXPECT_TRUE(dmc->AddSendStream(stream1));
cricket::StreamParams stream2;
stream2.add_ssrc(42);
EXPECT_TRUE(dmc->AddSendStream(stream2));
EXPECT_TRUE(dmc->RemoveSendStream(41));
EXPECT_TRUE(dmc->RemoveSendStream(42));
EXPECT_FALSE(dmc->RemoveSendStream(43));
}
TEST_F(RtpDataMediaChannelTest, AddRemoveRecvStream) {
std::unique_ptr<cricket::RtpDataMediaChannel> dmc(CreateChannel());
cricket::StreamParams stream1;
stream1.add_ssrc(41);
EXPECT_TRUE(dmc->AddRecvStream(stream1));
cricket::StreamParams stream2;
stream2.add_ssrc(42);
EXPECT_TRUE(dmc->AddRecvStream(stream2));
EXPECT_FALSE(dmc->AddRecvStream(stream2));
EXPECT_TRUE(dmc->RemoveRecvStream(41));
EXPECT_TRUE(dmc->RemoveRecvStream(42));
}
TEST_F(RtpDataMediaChannelTest, SendData) {
std::unique_ptr<cricket::RtpDataMediaChannel> dmc(CreateChannel());
cricket::SendDataParams params;
params.ssrc = 42;
unsigned char data[] = "food";
rtc::CopyOnWriteBuffer payload(data, 4);
unsigned char padded_data[] = {
0x00, 0x00, 0x00, 0x00, 'f', 'o', 'o', 'd',
};
cricket::SendDataResult result;
// Not sending
EXPECT_FALSE(dmc->SendData(params, payload, &result));
EXPECT_EQ(cricket::SDR_ERROR, result);
EXPECT_FALSE(HasSentData(0));
ASSERT_TRUE(dmc->SetSend(true));
// Unknown stream name.
EXPECT_FALSE(dmc->SendData(params, payload, &result));
EXPECT_EQ(cricket::SDR_ERROR, result);
EXPECT_FALSE(HasSentData(0));
cricket::StreamParams stream;
stream.add_ssrc(42);
ASSERT_TRUE(dmc->AddSendStream(stream));
// Unknown codec;
EXPECT_FALSE(dmc->SendData(params, payload, &result));
EXPECT_EQ(cricket::SDR_ERROR, result);
EXPECT_FALSE(HasSentData(0));
cricket::DataCodec codec;
codec.id = 103;
codec.name = cricket::kGoogleRtpDataCodecName;
cricket::DataSendParameters parameters;
parameters.codecs.push_back(codec);
ASSERT_TRUE(dmc->SetSendParameters(parameters));
// Length too large;
std::string x10000(10000, 'x');
EXPECT_FALSE(dmc->SendData(
params, rtc::CopyOnWriteBuffer(x10000.data(), x10000.length()), &result));
EXPECT_EQ(cricket::SDR_ERROR, result);
EXPECT_FALSE(HasSentData(0));
// Finally works!
EXPECT_TRUE(dmc->SendData(params, payload, &result));
EXPECT_EQ(cricket::SDR_SUCCESS, result);
ASSERT_TRUE(HasSentData(0));
EXPECT_EQ(sizeof(padded_data), GetSentData(0).length());
EXPECT_EQ(0, memcmp(padded_data, GetSentData(0).data(), sizeof(padded_data)));
cricket::RtpHeader header0 = GetSentDataHeader(0);
EXPECT_NE(0, header0.seq_num);
EXPECT_NE(0U, header0.timestamp);
EXPECT_EQ(header0.ssrc, 42U);
EXPECT_EQ(header0.payload_type, 103);
// Should bump timestamp by 180000 because the clock rate is 90khz.
SetNow(2);
EXPECT_TRUE(dmc->SendData(params, payload, &result));
ASSERT_TRUE(HasSentData(1));
EXPECT_EQ(sizeof(padded_data), GetSentData(1).length());
EXPECT_EQ(0, memcmp(padded_data, GetSentData(1).data(), sizeof(padded_data)));
cricket::RtpHeader header1 = GetSentDataHeader(1);
EXPECT_EQ(header1.ssrc, 42U);
EXPECT_EQ(header1.payload_type, 103);
EXPECT_EQ(static_cast<uint16_t>(header0.seq_num + 1),
static_cast<uint16_t>(header1.seq_num));
EXPECT_EQ(header0.timestamp + 180000, header1.timestamp);
}
TEST_F(RtpDataMediaChannelTest, SendDataRate) {
std::unique_ptr<cricket::RtpDataMediaChannel> dmc(CreateChannel());
ASSERT_TRUE(dmc->SetSend(true));
cricket::DataCodec codec;
codec.id = 103;
codec.name = cricket::kGoogleRtpDataCodecName;
cricket::DataSendParameters parameters;
parameters.codecs.push_back(codec);
ASSERT_TRUE(dmc->SetSendParameters(parameters));
cricket::StreamParams stream;
stream.add_ssrc(42);
ASSERT_TRUE(dmc->AddSendStream(stream));
cricket::SendDataParams params;
params.ssrc = 42;
unsigned char data[] = "food";
rtc::CopyOnWriteBuffer payload(data, 4);
cricket::SendDataResult result;
// With rtp overhead of 32 bytes, each one of our packets is 36
// bytes, or 288 bits. So, a limit of 872bps will allow 3 packets,
// but not four.
parameters.max_bandwidth_bps = 872;
ASSERT_TRUE(dmc->SetSendParameters(parameters));
EXPECT_TRUE(dmc->SendData(params, payload, &result));
EXPECT_TRUE(dmc->SendData(params, payload, &result));
EXPECT_TRUE(dmc->SendData(params, payload, &result));
EXPECT_FALSE(dmc->SendData(params, payload, &result));
EXPECT_FALSE(dmc->SendData(params, payload, &result));
SetNow(0.9);
EXPECT_FALSE(dmc->SendData(params, payload, &result));
SetNow(1.1);
EXPECT_TRUE(dmc->SendData(params, payload, &result));
EXPECT_TRUE(dmc->SendData(params, payload, &result));
SetNow(1.9);
EXPECT_TRUE(dmc->SendData(params, payload, &result));
SetNow(2.2);
EXPECT_TRUE(dmc->SendData(params, payload, &result));
EXPECT_TRUE(dmc->SendData(params, payload, &result));
EXPECT_TRUE(dmc->SendData(params, payload, &result));
EXPECT_FALSE(dmc->SendData(params, payload, &result));
}
TEST_F(RtpDataMediaChannelTest, ReceiveData) {
// PT= 103, SN=2, TS=3, SSRC = 4, data = "abcde"
unsigned char data[] = {0x80, 0x67, 0x00, 0x02, 0x00, 0x00, 0x00,
0x03, 0x00, 0x00, 0x00, 0x2A, 0x00, 0x00,
0x00, 0x00, 'a', 'b', 'c', 'd', 'e'};
rtc::CopyOnWriteBuffer packet(data, sizeof(data));
std::unique_ptr<cricket::RtpDataMediaChannel> dmc(CreateChannel());
// SetReceived not called.
dmc->OnPacketReceived(packet, /* packet_time_us */ -1);
EXPECT_FALSE(HasReceivedData());
dmc->SetReceive(true);
// Unknown payload id
dmc->OnPacketReceived(packet, /* packet_time_us */ -1);
EXPECT_FALSE(HasReceivedData());
cricket::DataCodec codec;
codec.id = 103;
codec.name = cricket::kGoogleRtpDataCodecName;
cricket::DataRecvParameters parameters;
parameters.codecs.push_back(codec);
ASSERT_TRUE(dmc->SetRecvParameters(parameters));
// Unknown stream
dmc->OnPacketReceived(packet, /* packet_time_us */ -1);
EXPECT_FALSE(HasReceivedData());
cricket::StreamParams stream;
stream.add_ssrc(42);
ASSERT_TRUE(dmc->AddRecvStream(stream));
// Finally works!
dmc->OnPacketReceived(packet, /* packet_time_us */ -1);
EXPECT_TRUE(HasReceivedData());
EXPECT_EQ("abcde", GetReceivedData());
EXPECT_EQ(5U, GetReceivedDataLen());
}
TEST_F(RtpDataMediaChannelTest, InvalidRtpPackets) {
unsigned char data[] = {0x80, 0x65, 0x00, 0x02};
rtc::CopyOnWriteBuffer packet(data, sizeof(data));
std::unique_ptr<cricket::RtpDataMediaChannel> dmc(CreateChannel());
// Too short
dmc->OnPacketReceived(packet, /* packet_time_us */ -1);
EXPECT_FALSE(HasReceivedData());
}