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
|
// Copyright (c) 2012 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.
#ifndef REMOTING_PROTOCOL_JINGLE_SESSION_H_
#define REMOTING_PROTOCOL_JINGLE_SESSION_H_
#include <string>
#include <vector>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/rand_util.h"
#include "base/strings/string_number_conversions.h"
#include "base/threading/thread_checker.h"
#include "base/timer/timer.h"
#include "crypto/rsa_private_key.h"
#include "net/base/completion_callback.h"
#include "remoting/protocol/authenticator.h"
#include "remoting/protocol/datagram_channel_factory.h"
#include "remoting/protocol/jingle_messages.h"
#include "remoting/protocol/session.h"
#include "remoting/protocol/session_config.h"
#include "remoting/signaling/iq_sender.h"
namespace remoting {
namespace protocol {
class JingleSessionManager;
class Transport;
// JingleSessionManager and JingleSession implement the subset of the
// Jingle protocol used in Chromoting. Instances of this class are
// created by the JingleSessionManager.
class JingleSession : public Session {
public:
~JingleSession() override;
// Session interface.
void SetEventHandler(Session::EventHandler* event_handler) override;
ErrorCode error() override;
const std::string& jid() override;
const SessionConfig& config() override;
void SetTransport(Transport* transport) override;
void Close(protocol::ErrorCode error) override;
void AddPlugin(SessionPlugin* plugin) override;
private:
friend class JingleSessionManager;
typedef base::Callback<void(JingleMessageReply::ErrorType)> ReplyCallback;
explicit JingleSession(JingleSessionManager* session_manager);
// Start connection by sending session-initiate message.
void StartConnection(const std::string& peer_jid,
std::unique_ptr<Authenticator> authenticator);
// Called by JingleSessionManager for incoming connections.
void InitializeIncomingConnection(
const JingleMessage& initiate_message,
std::unique_ptr<Authenticator> authenticator);
void AcceptIncomingConnection(const JingleMessage& initiate_message);
// Callback for Transport interface to send transport-info messages.
void SendTransportInfo(std::unique_ptr<buzz::XmlElement> transport_info);
// Sends |message| to the peer. The session is closed if the send fails or no
// response is received within a reasonable time. All other responses are
// ignored.
void SendMessage(std::unique_ptr<JingleMessage> message);
// Iq response handler.
void OnMessageResponse(JingleMessage::ActionType request_type,
IqRequest* request,
const buzz::XmlElement* response);
// Response handler for transport-info responses. Transport-info timeouts are
// ignored and don't terminate connection.
void OnTransportInfoResponse(IqRequest* request,
const buzz::XmlElement* response);
// Called by JingleSessionManager on incoming |message|. Must call
// |reply_callback| to send reply message before sending any other
// messages.
void OnIncomingMessage(const std::string& id,
std::unique_ptr<JingleMessage> message,
const ReplyCallback& reply_callback);
// Called by OnIncomingMessage() to process the incoming Jingle messages
// in the same order that they are sent.
void ProcessIncomingMessage(std::unique_ptr<JingleMessage> message,
const ReplyCallback& reply_callback);
// Message handlers for incoming messages.
void OnAccept(std::unique_ptr<JingleMessage> message,
const ReplyCallback& reply_callback);
void OnSessionInfo(std::unique_ptr<JingleMessage> message,
const ReplyCallback& reply_callback);
void OnTransportInfo(std::unique_ptr<JingleMessage> message,
const ReplyCallback& reply_callback);
void OnTerminate(std::unique_ptr<JingleMessage> message,
const ReplyCallback& reply_callback);
// Called from OnAccept() to initialize session config.
bool InitializeConfigFromDescription(const ContentDescription* description);
// Called after the initial incoming authenticator message is processed.
void ContinueAcceptIncomingConnection();
// Called after subsequent authenticator messages are processed.
void ProcessAuthenticationStep();
// Called when authentication is finished.
void OnAuthenticated();
// Sets |state_| to |new_state| and calls state change callback.
void SetState(State new_state);
// Returns true if the state of the session is not CLOSED or FAILED
bool is_session_active();
// Executes all plugins against incoming JingleMessage.
void ProcessIncomingPluginMessage(const JingleMessage& message);
// Executes all plugins against outgoing JingleMessage.
void AddPluginAttachments(JingleMessage* message);
// Sends session-initiate message.
void SendSessionInitiateMessage();
// Returns the value of the ID attribute of the next outgoing set IQ with the
// sequence ID encoded.
std::string GetNextOutgoingId();
base::ThreadChecker thread_checker_;
JingleSessionManager* session_manager_;
SignalingAddress peer_address_;
Session::EventHandler* event_handler_;
std::string session_id_;
State state_;
ErrorCode error_;
std::unique_ptr<SessionConfig> config_;
std::unique_ptr<Authenticator> authenticator_;
Transport* transport_ = nullptr;
// Pending Iq requests. Used for all messages except transport-info.
std::vector<std::unique_ptr<IqRequest>> pending_requests_;
// Pending transport-info requests.
std::vector<std::unique_ptr<IqRequest>> transport_info_requests_;
struct PendingMessage {
PendingMessage();
PendingMessage(PendingMessage&& moved);
PendingMessage(std::unique_ptr<JingleMessage> message,
const ReplyCallback& reply_callback);
~PendingMessage();
PendingMessage& operator=(PendingMessage&& moved);
std::unique_ptr<JingleMessage> message;
ReplyCallback reply_callback;
};
// A message queue to guarantee the incoming messages are processed in order.
class OrderedMessageQueue;
std::unique_ptr<OrderedMessageQueue> message_queue_;
// This prefix is necessary to disambiguate between the ID's sent from the
// client and the ID's sent from the host.
std::string outgoing_id_prefix_ = base::Uint64ToString(base::RandUint64());
int next_outgoing_id_ = 0;
// Transport info messages that are received while the session is being
// authenticated.
std::vector<PendingMessage> pending_transport_info_;
// The SessionPlugins attached to this session.
std::vector<SessionPlugin*> plugins_;
base::WeakPtrFactory<JingleSession> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(JingleSession);
};
} // namespace protocol
} // namespace remoting
#endif // REMOTING_PROTOCOL_JINGLE_SESSION_H_
|
