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
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
// Copyright (c) 2011 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/connection_to_host.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/message_loop.h"
#include "remoting/base/constants.h"
#include "remoting/jingle_glue/host_resolver.h"
#include "remoting/jingle_glue/http_port_allocator.h"
#include "remoting/jingle_glue/javascript_signal_strategy.h"
#include "remoting/jingle_glue/xmpp_signal_strategy.h"
#include "remoting/protocol/auth_token_utils.h"
#include "remoting/protocol/client_message_dispatcher.h"
#include "remoting/protocol/client_stub.h"
#include "remoting/protocol/host_control_sender.h"
#include "remoting/protocol/input_sender.h"
#include "remoting/protocol/jingle_session_manager.h"
#include "remoting/protocol/video_reader.h"
#include "remoting/protocol/video_stub.h"
#include "remoting/protocol/util.h"
namespace remoting {
namespace protocol {
ConnectionToHost::ConnectionToHost(
MessageLoop* message_loop,
talk_base::NetworkManager* network_manager,
talk_base::PacketSocketFactory* socket_factory,
HostResolverFactory* host_resolver_factory,
PortAllocatorSessionFactory* session_factory,
bool allow_nat_traversal)
: message_loop_(message_loop),
network_manager_(network_manager),
socket_factory_(socket_factory),
host_resolver_factory_(host_resolver_factory),
port_allocator_session_factory_(session_factory),
allow_nat_traversal_(allow_nat_traversal),
state_(STATE_EMPTY),
event_callback_(NULL),
dispatcher_(new ClientMessageDispatcher()),
client_stub_(NULL),
video_stub_(NULL) {
}
ConnectionToHost::~ConnectionToHost() {
}
InputStub* ConnectionToHost::input_stub() {
return input_sender_.get();
}
HostStub* ConnectionToHost::host_stub() {
return host_control_sender_.get();
}
void ConnectionToHost::Connect(scoped_refptr<XmppProxy> xmpp_proxy,
const std::string& your_jid,
const std::string& host_jid,
const std::string& host_public_key,
const std::string& access_code,
HostEventCallback* event_callback,
ClientStub* client_stub,
VideoStub* video_stub) {
event_callback_ = event_callback;
client_stub_ = client_stub;
video_stub_ = video_stub;
access_code_ = access_code;
// Save jid of the host. The actual connection is created later after
// |signal_strategy_| is connected.
host_jid_ = host_jid;
host_public_key_ = host_public_key;
// Initialize |signal_strategy_|.
JavascriptSignalStrategy* strategy = new JavascriptSignalStrategy(your_jid);
strategy->AttachXmppProxy(xmpp_proxy);
signal_strategy_.reset(strategy);
signal_strategy_->Init(this);
}
void ConnectionToHost::Disconnect(const base::Closure& shutdown_task) {
if (MessageLoop::current() != message_loop_) {
message_loop_->PostTask(
FROM_HERE, base::Bind(&ConnectionToHost::Disconnect,
base::Unretained(this), shutdown_task));
return;
}
CloseChannels();
if (session_.get())
session_.reset();
if (session_manager_.get())
session_manager_.reset();
if (signal_strategy_.get())
signal_strategy_.reset();
shutdown_task.Run();
}
void ConnectionToHost::InitSession() {
DCHECK_EQ(message_loop_, MessageLoop::current());
// Initialize chromotocol |session_manager_|.
JingleSessionManager* session_manager =
JingleSessionManager::CreateSandboxed(
network_manager_.release(), socket_factory_.release(),
host_resolver_factory_.release(),
port_allocator_session_factory_.release());
// TODO(ajwong): Make this a command switch when we're more stable.
session_manager->set_allow_local_ips(true);
session_manager_.reset(session_manager);
session_manager_->Init(
local_jid_, signal_strategy_.get(), this, NULL, "", allow_nat_traversal_);
}
const SessionConfig* ConnectionToHost::config() {
return session_->config();
}
void ConnectionToHost::OnStateChange(
SignalStrategy::StatusObserver::State state) {
DCHECK_EQ(message_loop_, MessageLoop::current());
DCHECK(event_callback_);
if (state == SignalStrategy::StatusObserver::CONNECTED) {
VLOG(1) << "Connected as: " << local_jid_;
InitSession();
} else if (state == SignalStrategy::StatusObserver::CLOSED) {
VLOG(1) << "Connection closed.";
event_callback_->OnConnectionClosed(this);
}
}
void ConnectionToHost::OnJidChange(const std::string& full_jid) {
DCHECK_EQ(message_loop_, MessageLoop::current());
local_jid_ = full_jid;
}
void ConnectionToHost::OnSessionManagerInitialized() {
DCHECK_EQ(message_loop_, MessageLoop::current());
// After SessionManager is initialized we can try to connect to the host.
CandidateSessionConfig* candidate_config =
CandidateSessionConfig::CreateDefault();
std::string client_token =
protocol::GenerateSupportAuthToken(local_jid_, access_code_);
session_.reset(session_manager_->Connect(
host_jid_, host_public_key_, client_token, candidate_config,
NewCallback(this, &ConnectionToHost::OnSessionStateChange)));
// Set the shared-secret for securing SSL channels.
session_->set_shared_secret(access_code_);
}
void ConnectionToHost::OnIncomingSession(
Session* session,
SessionManager::IncomingSessionResponse* response) {
DCHECK_EQ(message_loop_, MessageLoop::current());
// Client always rejects incoming sessions.
*response = SessionManager::DECLINE;
}
void ConnectionToHost::OnSessionStateChange(
Session::State state) {
DCHECK_EQ(message_loop_, MessageLoop::current());
DCHECK(event_callback_);
switch (state) {
case Session::FAILED:
state_ = STATE_FAILED;
CloseChannels();
event_callback_->OnConnectionFailed(this);
break;
case Session::CLOSED:
state_ = STATE_CLOSED;
CloseChannels();
event_callback_->OnConnectionClosed(this);
break;
case Session::CONNECTED:
state_ = STATE_CONNECTED;
// Initialize reader and writer.
video_reader_.reset(VideoReader::Create(session_->config()));
video_reader_->Init(session_.get(), video_stub_);
host_control_sender_.reset(
new HostControlSender(session_->control_channel()));
dispatcher_->Initialize(session_.get(), client_stub_);
event_callback_->OnConnectionOpened(this);
break;
default:
// Ignore the other states by default.
break;
}
}
void ConnectionToHost::CloseChannels() {
if (input_sender_.get())
input_sender_->Close();
if (host_control_sender_.get())
host_control_sender_->Close();
}
void ConnectionToHost::OnClientAuthenticated() {
// TODO(hclam): Don't send anything except authentication request if it is
// not authenticated.
state_ = STATE_AUTHENTICATED;
// Create and enable the input stub now that we're authenticated.
input_sender_.reset(new InputSender(session_->event_channel()));
}
ConnectionToHost::State ConnectionToHost::state() const {
return state_;
}
} // namespace protocol
} // namespace remoting
|
