1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
/*
* 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/api/quicdatatransport.h"
#include "webrtc/base/bind.h"
#include "webrtc/base/logging.h"
#include "webrtc/p2p/quic/quictransportchannel.h"
#include "webrtc/p2p/quic/reliablequicstream.h"
namespace webrtc {
QuicDataTransport::QuicDataTransport(
rtc::Thread* signaling_thread,
rtc::Thread* worker_thread,
rtc::Thread* network_thread,
cricket::TransportController* transport_controller)
: signaling_thread_(signaling_thread),
worker_thread_(worker_thread),
network_thread_(network_thread),
transport_controller_(transport_controller) {
RTC_DCHECK(signaling_thread_);
RTC_DCHECK(worker_thread_);
RTC_DCHECK(network_thread_);
}
QuicDataTransport::~QuicDataTransport() {
DestroyTransportChannel(quic_transport_channel_);
LOG(LS_INFO) << "Destroyed the QUIC data transport.";
}
bool QuicDataTransport::SetTransport(const std::string& transport_name) {
if (transport_name_ == transport_name) {
// Nothing to do if transport name isn't changing
return true;
}
cricket::QuicTransportChannel* transport_channel =
CreateTransportChannel(transport_name);
if (!SetTransportChannel(transport_channel)) {
DestroyTransportChannel(transport_channel);
return false;
}
transport_name_ = transport_name;
return true;
}
bool QuicDataTransport::SetTransportChannel(
cricket::QuicTransportChannel* channel) {
if (!channel) {
LOG(LS_ERROR) << "|channel| is NULL. Cannot set transport channel.";
return false;
}
if (quic_transport_channel_) {
if (channel == quic_transport_channel_) {
LOG(LS_WARNING) << "Ignoring duplicate transport channel.";
return true;
}
LOG(LS_ERROR) << "|channel| does not match existing transport channel.";
return false;
}
LOG(LS_INFO) << "Setting QuicTransportChannel for QuicDataTransport";
quic_transport_channel_ = channel;
quic_transport_channel_->SignalIncomingStream.connect(
this, &QuicDataTransport::OnIncomingStream);
bool success = true;
for (const auto& kv : data_channel_by_id_) {
rtc::scoped_refptr<QuicDataChannel> data_channel = kv.second;
if (!data_channel->SetTransportChannel(quic_transport_channel_)) {
LOG(LS_ERROR)
<< "Cannot set QUIC transport channel for QUIC data channel "
<< kv.first;
success = false;
}
}
return success;
}
rtc::scoped_refptr<DataChannelInterface> QuicDataTransport::CreateDataChannel(
const std::string& label,
const DataChannelInit* config) {
if (config == nullptr) {
return nullptr;
}
if (data_channel_by_id_.find(config->id) != data_channel_by_id_.end()) {
LOG(LS_ERROR) << "QUIC data channel already exists with id " << config->id;
return nullptr;
}
rtc::scoped_refptr<QuicDataChannel> data_channel(new QuicDataChannel(
signaling_thread_, worker_thread_, network_thread_, label, *config));
if (quic_transport_channel_) {
if (!data_channel->SetTransportChannel(quic_transport_channel_)) {
LOG(LS_ERROR)
<< "Cannot set QUIC transport channel for QUIC data channel "
<< config->id;
}
}
data_channel_by_id_[data_channel->id()] = data_channel;
return data_channel;
}
void QuicDataTransport::DestroyDataChannel(int id) {
data_channel_by_id_.erase(id);
}
bool QuicDataTransport::HasDataChannel(int id) const {
return data_channel_by_id_.find(id) != data_channel_by_id_.end();
}
bool QuicDataTransport::HasDataChannels() const {
return !data_channel_by_id_.empty();
}
// Called when a QUIC stream is created for incoming data.
void QuicDataTransport::OnIncomingStream(cricket::ReliableQuicStream* stream) {
RTC_DCHECK(stream != nullptr);
quic_stream_by_id_[stream->id()] = stream;
stream->SignalDataReceived.connect(this, &QuicDataTransport::OnDataReceived);
}
// Called when the first QUIC stream frame is received for incoming data.
void QuicDataTransport::OnDataReceived(net::QuicStreamId id,
const char* data,
size_t len) {
const auto& quic_stream_kv = quic_stream_by_id_.find(id);
if (quic_stream_kv == quic_stream_by_id_.end()) {
RTC_NOTREACHED();
return;
}
cricket::ReliableQuicStream* stream = quic_stream_kv->second;
stream->SignalDataReceived.disconnect(this);
quic_stream_by_id_.erase(id);
// Read the data channel ID and message ID.
int data_channel_id;
uint64_t message_id;
size_t bytes_read;
if (!ParseQuicDataMessageHeader(data, len, &data_channel_id, &message_id,
&bytes_read)) {
LOG(LS_ERROR) << "Could not read QUIC message header from QUIC stream "
<< id;
return;
}
data += bytes_read;
len -= bytes_read;
// Retrieve the data channel which will handle the message.
const auto& data_channel_kv = data_channel_by_id_.find(data_channel_id);
if (data_channel_kv == data_channel_by_id_.end()) {
// TODO(mikescarlett): Implement OPEN message to create a new
// QuicDataChannel when messages are received for a nonexistent ID.
LOG(LS_ERROR) << "Data was received for QUIC data channel "
<< data_channel_id
<< " but it is not registered to the QuicDataTransport.";
return;
}
QuicDataChannel* data_channel = data_channel_kv->second;
QuicDataChannel::Message message;
message.id = message_id;
message.buffer = rtc::CopyOnWriteBuffer(data, len);
message.stream = stream;
data_channel->OnIncomingMessage(std::move(message));
}
cricket::QuicTransportChannel* QuicDataTransport::CreateTransportChannel(
const std::string& transport_name) {
DCHECK(transport_controller_->quic());
cricket::TransportChannel* transport_channel =
network_thread_->Invoke<cricket::TransportChannel*>(
RTC_FROM_HERE,
rtc::Bind(&cricket::TransportController::CreateTransportChannel_n,
transport_controller_, transport_name,
cricket::ICE_CANDIDATE_COMPONENT_DEFAULT));
return static_cast<cricket::QuicTransportChannel*>(transport_channel);
}
void QuicDataTransport::DestroyTransportChannel(
cricket::TransportChannel* transport_channel) {
if (transport_channel) {
network_thread_->Invoke<void>(
RTC_FROM_HERE,
rtc::Bind(&cricket::TransportController::DestroyTransportChannel_n,
transport_controller_, transport_channel->transport_name(),
cricket::ICE_CANDIDATE_COMPONENT_DEFAULT));
}
}
} // namespace webrtc
|
