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
|
// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_ADAPTERS_DTLS_TRANSPORT_PROXY_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_ADAPTERS_DTLS_TRANSPORT_PROXY_H_
#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "base/task/single_thread_task_runner.h"
#include "third_party/blink/renderer/platform/heap/cross_thread_handle.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/visitor.h"
#include "third_party/webrtc/api/dtls_transport_interface.h"
// The DtlsTransportProxy class takes care of thread-jumping when
// connecting callbacks from a webrtc::DtlsTransport to a
// blink::RTCDtlsTransport object.
// Its design is modeled on the IceTransportProxy design,
// but does not use so many layers of indirection - there is
// no control, and all information is passed via callbacks on the Delegate.
// The proxy thread = the Blink main thread
// The host thread = the webrtc network thread (the one that gets callbacks)
namespace blink {
class LocalFrame;
class DtlsTransportProxy : public webrtc::DtlsTransportObserverInterface {
public:
class Delegate : public GarbageCollectedMixin {
public:
virtual ~Delegate() = default;
// Called when the Create() function is complete. Sends current state,
// but does not indicate a state change.
virtual void OnStartCompleted(webrtc::DtlsTransportInformation info) = 0;
// Called when a state change is signalled from transport.
virtual void OnStateChange(webrtc::DtlsTransportInformation info) = 0;
void Trace(Visitor* visitor) const override {}
};
// Constructs a DtlsTransportProxy.
// The caller is responsible for keeping |dtls_transport| and |delegate|
// alive until after the DtlsTransportProxy is deleted.
// The DtlsTransportProxy can be safely deleted after seeing the
// state |kClosed|, since this is the last event that can happen
// on the transport.
static std::unique_ptr<DtlsTransportProxy> Create(
LocalFrame& frame,
scoped_refptr<base::SingleThreadTaskRunner> proxy_thread,
scoped_refptr<base::SingleThreadTaskRunner> host_thread,
webrtc::DtlsTransportInterface* dtls_transport,
Delegate* delegate);
private:
DtlsTransportProxy(LocalFrame& frame,
scoped_refptr<base::SingleThreadTaskRunner> proxy_thread,
scoped_refptr<base::SingleThreadTaskRunner> host_thread,
webrtc::DtlsTransportInterface* dtls_transport,
Delegate* delegate);
// Implementation of webrtc::DtlsTransportObserver
void OnStateChange(webrtc::DtlsTransportInformation info) override;
void OnError(webrtc::RTCError error) override;
// Internal helper for Create()
void StartOnHostThread();
const scoped_refptr<base::SingleThreadTaskRunner> proxy_thread_;
const scoped_refptr<base::SingleThreadTaskRunner> host_thread_;
raw_ptr<webrtc::DtlsTransportInterface> dtls_transport_;
CrossThreadHandle<Delegate> delegate_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_ADAPTERS_DTLS_TRANSPORT_PROXY_H_
|
