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
|
/*
* libjingle
* Copyright 2004--2005, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TALK_P2P_BASE_STUNREQUEST_H_
#define TALK_P2P_BASE_STUNREQUEST_H_
#include "talk/base/sigslot.h"
#include "talk/base/thread.h"
#include "talk/p2p/base/stun.h"
#include <map>
#include <string>
namespace cricket {
class StunRequest;
// Manages a set of STUN requests, sending and resending until we receive a
// response or determine that the request has timed out.
class StunRequestManager {
public:
StunRequestManager(talk_base::Thread* thread);
~StunRequestManager();
// Starts sending the given request (perhaps after a delay).
void Send(StunRequest* request);
void SendDelayed(StunRequest* request, int delay);
// Removes a stun request that was added previously. This will happen
// automatically when a request succeeds, fails, or times out.
void Remove(StunRequest* request);
// Removes all stun requests that were added previously.
void Clear();
// Determines whether the given message is a response to one of the
// outstanding requests, and if so, processes it appropriately.
bool CheckResponse(StunMessage* msg);
bool CheckResponse(const char* data, size_t size);
bool empty() { return requests_.empty(); }
// Raised when there are bytes to be sent.
sigslot::signal3<const void*, size_t, StunRequest*> SignalSendPacket;
private:
typedef std::map<std::string, StunRequest*> RequestMap;
talk_base::Thread* thread_;
RequestMap requests_;
friend class StunRequest;
};
// Represents an individual request to be sent. The STUN message can either be
// constructed beforehand or built on demand.
class StunRequest : public talk_base::MessageHandler {
public:
StunRequest();
StunRequest(StunMessage* request);
virtual ~StunRequest();
// Causes our wrapped StunMessage to be Prepared
void Construct();
// The manager handling this request (if it has been scheduled for sending).
StunRequestManager* manager() { return manager_; }
// Returns the transaction ID of this request.
const std::string& id() { return msg_->transaction_id(); }
// Returns the STUN type of the request message.
int type();
// Returns a const pointer to |msg_|.
const StunMessage* msg() const;
// Time elapsed since last send (in ms)
uint32 Elapsed() const;
protected:
int count_;
bool timeout_;
// Fills in a request object to be sent. Note that request's transaction ID
// will already be set and cannot be changed.
virtual void Prepare(StunMessage* request) {}
// Called when the message receives a response or times out.
virtual void OnResponse(StunMessage* response) {}
virtual void OnErrorResponse(StunMessage* response) {}
virtual void OnTimeout() {}
virtual int GetNextDelay();
private:
void set_manager(StunRequestManager* manager);
// Handles messages for sending and timeout.
void OnMessage(talk_base::Message* pmsg);
StunRequestManager* manager_;
StunMessage* msg_;
uint32 tstamp_;
friend class StunRequestManager;
};
} // namespace cricket
#endif // TALK_P2P_BASE_STUNREQUEST_H_
|
