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
|
/*
* 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_SESSIONCLIENT_H_
#define TALK_P2P_BASE_SESSIONCLIENT_H_
#include "talk/p2p/base/constants.h"
namespace buzz {
class XmlElement;
}
namespace cricket {
struct ParseError;
class Session;
class ContentDescription;
class ContentParser {
public:
virtual bool ParseContent(SignalingProtocol protocol,
const buzz::XmlElement* elem,
ContentDescription** content,
ParseError* error) = 0;
// If not IsWriteable, then a given content should be "skipped" when
// writing in the given protocol, as if it didn't exist. We assume
// most things are writeable. We do this to avoid strange cases
// like data contents in Gingle, which aren't writable.
virtual bool IsWritable(SignalingProtocol protocol,
const ContentDescription* content) {
return true;
}
virtual bool WriteContent(SignalingProtocol protocol,
const ContentDescription* content,
buzz::XmlElement** elem,
WriteError* error) = 0;
virtual ~ContentParser() {}
};
// A SessionClient exists in 1-1 relation with each session. The implementor
// of this interface is the one that understands *what* the two sides are
// trying to send to one another. The lower-level layers only know how to send
// data; they do not know what is being sent.
class SessionClient : public ContentParser {
public:
// Notifies the client of the creation / destruction of sessions of this type.
//
// IMPORTANT: The SessionClient, in its handling of OnSessionCreate, must
// create whatever channels are indicate in the description. This is because
// the remote client may already be attempting to connect those channels. If
// we do not create our channel right away, then connection may fail or be
// delayed.
virtual void OnSessionCreate(Session* session, bool received_initiate) = 0;
virtual void OnSessionDestroy(Session* session) = 0;
virtual bool ParseContent(SignalingProtocol protocol,
const buzz::XmlElement* elem,
ContentDescription** content,
ParseError* error) = 0;
virtual bool WriteContent(SignalingProtocol protocol,
const ContentDescription* content,
buzz::XmlElement** elem,
WriteError* error) = 0;
protected:
// The SessionClient interface explicitly does not include destructor
virtual ~SessionClient() { }
};
} // namespace cricket
#endif // TALK_P2P_BASE_SESSIONCLIENT_H_
|
