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
|
// Copyright 2015 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 "remoting/protocol/channel_socket_adapter.h"
#include <limits>
#include "base/callback.h"
#include "base/logging.h"
#include "net/base/io_buffer.h"
#include "net/base/net_errors.h"
#include "third_party/webrtc/p2p/base/transportchannel.h"
namespace remoting {
namespace protocol {
TransportChannelSocketAdapter::TransportChannelSocketAdapter(
cricket::TransportChannel* channel)
: channel_(channel),
closed_error_code_(net::OK) {
DCHECK(channel_);
channel_->SignalReadPacket.connect(
this, &TransportChannelSocketAdapter::OnNewPacket);
channel_->SignalWritableState.connect(
this, &TransportChannelSocketAdapter::OnWritableState);
channel_->SignalDestroyed.connect(
this, &TransportChannelSocketAdapter::OnChannelDestroyed);
}
TransportChannelSocketAdapter::~TransportChannelSocketAdapter() {
if (!destruction_callback_.is_null())
destruction_callback_.Run();
}
void TransportChannelSocketAdapter::SetOnDestroyedCallback(
const base::Closure& callback) {
destruction_callback_ = callback;
}
int TransportChannelSocketAdapter::Recv(
const scoped_refptr<net::IOBuffer>& buf, int buffer_size,
const net::CompletionCallback& callback) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(buf);
DCHECK(!callback.is_null());
CHECK(read_callback_.is_null());
if (!channel_) {
DCHECK(closed_error_code_ != net::OK);
return closed_error_code_;
}
read_callback_ = callback;
read_buffer_ = buf;
read_buffer_size_ = buffer_size;
return net::ERR_IO_PENDING;
}
int TransportChannelSocketAdapter::Send(
const scoped_refptr<net::IOBuffer>& buffer, int buffer_size,
const net::CompletionCallback& callback) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(buffer);
DCHECK(!callback.is_null());
CHECK(write_callback_.is_null());
if (!channel_) {
DCHECK(closed_error_code_ != net::OK);
return closed_error_code_;
}
int result;
rtc::PacketOptions options;
if (channel_->writable()) {
result = channel_->SendPacket(buffer->data(), buffer_size, options);
if (result < 0) {
result = net::MapSystemError(channel_->GetError());
// If the underlying socket returns IO pending where it shouldn't we
// pretend the packet is dropped and return as succeeded because no
// writeable callback will happen.
if (result == net::ERR_IO_PENDING)
result = net::OK;
}
} else {
// Channel is not writable yet.
result = net::ERR_IO_PENDING;
write_callback_ = callback;
write_buffer_ = buffer;
write_buffer_size_ = buffer_size;
}
return result;
}
void TransportChannelSocketAdapter::Close(int error_code) {
DCHECK(thread_checker_.CalledOnValidThread());
if (!channel_) // Already closed.
return;
DCHECK(error_code != net::OK);
closed_error_code_ = error_code;
channel_->SignalReadPacket.disconnect(this);
channel_->SignalDestroyed.disconnect(this);
channel_ = NULL;
if (!read_callback_.is_null()) {
net::CompletionCallback callback = read_callback_;
read_callback_.Reset();
read_buffer_ = NULL;
callback.Run(error_code);
}
if (!write_callback_.is_null()) {
net::CompletionCallback callback = write_callback_;
write_callback_.Reset();
write_buffer_ = NULL;
callback.Run(error_code);
}
}
void TransportChannelSocketAdapter::OnNewPacket(
cricket::TransportChannel* channel,
const char* data,
size_t data_size,
const rtc::PacketTime& packet_time,
int flags) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK_EQ(channel, channel_);
if (!read_callback_.is_null()) {
DCHECK(read_buffer_.get());
CHECK_LT(data_size, static_cast<size_t>(std::numeric_limits<int>::max()));
if (read_buffer_size_ < static_cast<int>(data_size)) {
LOG(WARNING) << "Data buffer is smaller than the received packet. "
<< "Dropping the data that doesn't fit.";
data_size = read_buffer_size_;
}
memcpy(read_buffer_->data(), data, data_size);
net::CompletionCallback callback = read_callback_;
read_callback_.Reset();
read_buffer_ = NULL;
callback.Run(data_size);
} else {
LOG(WARNING)
<< "Data was received without a callback. Dropping the packet.";
}
}
void TransportChannelSocketAdapter::OnWritableState(
cricket::TransportChannel* channel) {
DCHECK(thread_checker_.CalledOnValidThread());
// Try to send the packet if there is a pending write.
if (!write_callback_.is_null()) {
rtc::PacketOptions options;
int result = channel_->SendPacket(write_buffer_->data(),
write_buffer_size_,
options);
if (result < 0)
result = net::MapSystemError(channel_->GetError());
if (result != net::ERR_IO_PENDING) {
net::CompletionCallback callback = write_callback_;
write_callback_.Reset();
write_buffer_ = NULL;
callback.Run(result);
}
}
}
void TransportChannelSocketAdapter::OnChannelDestroyed(
cricket::TransportChannel* channel) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK_EQ(channel, channel_);
Close(net::ERR_CONNECTION_ABORTED);
}
} // namespace protocol
} // namespace remoting
|
