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
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
|
<!doctype html>
<meta charset=utf-8>
<title>RTCPeerConnection.prototype.connectionState</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="RTCPeerConnection-helper.js"></script>
<script>
'use strict';
// Test is based on the following editor draft:
// https://w3c.github.io/webrtc-pc/archives/20170605/webrtc.htm
// The following helper functions are called from RTCPeerConnection-helper.js:
// exchangeIceCandidates
// exchangeOfferAnswer
/*
4.3.2. Interface Definition
interface RTCPeerConnection : EventTarget {
...
readonly attribute RTCPeerConnectionState connectionState;
attribute EventHandler onconnectionstatechange;
};
4.4.3. RTCPeerConnectionState Enum
enum RTCPeerConnectionState {
"new",
"connecting",
"connected",
"disconnected",
"failed",
"closed"
};
5.5. RTCDtlsTransport Interface
interface RTCDtlsTransport {
readonly attribute RTCIceTransport iceTransport;
readonly attribute RTCDtlsTransportState state;
...
};
enum RTCDtlsTransportState {
"new",
"connecting",
"connected",
"closed",
"failed"
};
5.6. RTCIceTransport Interface
interface RTCIceTransport {
readonly attribute RTCIceTransportState state;
...
};
enum RTCIceTransportState {
"new",
"checking",
"connected",
"completed",
"failed",
"disconnected",
"closed"
};
*/
/*
4.4.3. RTCPeerConnectionState Enum
new
Any of the RTCIceTransports or RTCDtlsTransports are in the new
state and none of the transports are in the connecting, checking,
failed or disconnected state, or all transports are in the closed state.
*/
test(t => {
const pc = new RTCPeerConnection();
assert_equals(pc.connectionState, 'new');
}, 'Initial connectionState should be new');
test(t => {
const pc = new RTCPeerConnection();
pc.close();
assert_equals(pc.connectionState, 'closed');
}, 'Closing the connection should set connectionState to closed');
/*
4.4.3. RTCPeerConnectionState Enum
connected
All RTCIceTransports and RTCDtlsTransports are in the connected,
completed or closed state and at least of them is in the connected
or completed state.
5.5. RTCDtlsTransportState
connected
DTLS has completed negotiation of a secure connection.
5.6. RTCIceTransportState
connected
The RTCIceTransport has found a usable connection, but is still
checking other candidate pairs to see if there is a better connection.
It may also still be gathering and/or waiting for additional remote
candidates. If consent checks [RFC7675] fail on the connection in use,
and there are no other successful candidate pairs available, then the
state transitions to "checking" (if there are candidate pairs remaining
to be checked) or "disconnected" (if there are no candidate pairs to
check, but the peer is still gathering and/or waiting for additional
remote candidates).
completed
The RTCIceTransport has finished gathering, received an indication that
there are no more remote candidates, finished checking all candidate
pairs and found a connection. If consent checks [RFC7675] subsequently
fail on all successful candidate pairs, the state transitions to "failed".
*/
async_test(t => {
const pc1 = new RTCPeerConnection();
t.add_cleanup(() => pc1.close());
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc2.close());
let had_connecting = false;
const onConnectionStateChange = t.step_func(() => {
const {connectionState} = pc1;
if (connectionState === 'connecting') {
had_connecting = true;
} else if (connectionState === 'connected') {
assert_true(had_connecting, "state should pass connecting before reaching connected");
t.done();
}
});
pc1.createDataChannel('test');
pc1.addEventListener('connectionstatechange', onConnectionStateChange);
exchangeIceCandidates(pc1, pc2);
exchangeOfferAnswer(pc1, pc2);
}, 'connection with one data channel should eventually have connected connection state');
async_test(t => {
const pc1 = new RTCPeerConnection();
t.add_cleanup(() => pc1.close());
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc2.close());
const onConnectionStateChange = t.step_func(() => {
const {connectionState} = pc1;
if (connectionState === 'connected') {
const sctpTransport = pc1.sctp;
const dtlsTransport = sctpTransport.transport;
assert_equals(dtlsTransport.state, 'connected',
'Expect DTLS transport to be in connected state');
const iceTransport = dtlsTransport.iceTransport
assert_true(iceTransport.state === 'connected' ||
iceTransport.state === 'completed',
'Expect ICE transport to be in connected or completed state');
t.done();
}
});
pc1.createDataChannel('test');
pc1.addEventListener('connectionstatechange', onConnectionStateChange);
exchangeIceCandidates(pc1, pc2);
exchangeOfferAnswer(pc1, pc2);
}, 'connection with one data channel should eventually have transports in connected state');
/*
TODO
4.4.3. RTCPeerConnectionState Enum
connecting
Any of the RTCIceTransports or RTCDtlsTransports are in the
connecting or checking state and none of them is in the failed state.
disconnected
Any of the RTCIceTransports or RTCDtlsTransports are in the disconnected
state and none of them are in the failed or connecting or checking state.
failed
Any of the RTCIceTransports or RTCDtlsTransports are in a failed state.
closed
The RTCPeerConnection object's [[isClosed]] slot is true.
5.5. RTCDtlsTransportState
new
DTLS has not started negotiating yet.
connecting
DTLS is in the process of negotiating a secure connection.
closed
The transport has been closed.
failed
The transport has failed as the result of an error (such as a failure
to validate the remote fingerprint).
5.6. RTCIceTransportState
new
The RTCIceTransport is gathering candidates and/or waiting for
remote candidates to be supplied, and has not yet started checking.
checking
The RTCIceTransport has received at least one remote candidate and
is checking candidate pairs and has either not yet found a connection
or consent checks [RFC7675] have failed on all previously successful
candidate pairs. In addition to checking, it may also still be gathering.
failed
The RTCIceTransport has finished gathering, received an indication that
there are no more remote candidates, finished checking all candidate pairs,
and all pairs have either failed connectivity checks or have lost consent.
disconnected
The ICE Agent has determined that connectivity is currently lost for this
RTCIceTransport . This is more aggressive than failed, and may trigger
intermittently (and resolve itself without action) on a flaky network.
The way this state is determined is implementation dependent.
Examples include:
Losing the network interface for the connection in use.
Repeatedly failing to receive a response to STUN requests.
Alternatively, the RTCIceTransport has finished checking all existing
candidates pairs and failed to find a connection (or consent checks
[RFC7675] once successful, have now failed), but it is still gathering
and/or waiting for additional remote candidates.
closed
The RTCIceTransport has shut down and is no longer responding to STUN requests.
*/
promise_test(async t => {
const caller = new RTCPeerConnection();
t.add_cleanup(() => caller.close());
const callee = new RTCPeerConnection();
t.add_cleanup(() => callee.close());
const stream = await getNoiseStream({audio: true});
t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));
const [track] = stream.getTracks();
caller.addTrack(track, stream);
await exchangeOfferAnswer(caller, callee);
assert_equals(caller.iceConnectionState, 'new');
assert_equals(callee.iceConnectionState, 'new');
}, 'connectionState remains new when not adding remote ice candidates');
promise_test(async t => {
const caller = new RTCPeerConnection();
t.add_cleanup(() => caller.close());
const callee = new RTCPeerConnection();
t.add_cleanup(() => callee.close());
const stream = await getNoiseStream({audio: true});
t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));
const [track] = stream.getTracks();
caller.addTrack(track, stream);
const states = [];
caller.addEventListener('connectionstatechange', () => states.push(caller.connectionState));
exchangeIceCandidates(caller, callee);
await exchangeOfferAnswer(caller, callee);
await listenToConnected(caller);
assert_array_equals(states, ['connecting', 'connected']);
}, 'connectionState transitions to connected via connecting');
// Make the callee act as if not bundle-aware
async function exchangeOfferAnswerUnbundled(caller, callee) {
const offer = await caller.createOffer();
const sdp = offer.sdp.replace('BUNDLE', 'SOMETHING')
.replace(/rtp-hdrext:sdes/g, 'rtp-hdrext:something')
.replace(/a=ssrc:/g, 'a=notssrc');
await caller.setLocalDescription(offer);
await callee.setRemoteDescription({type: 'offer', sdp});
await exchangeAnswer(caller, callee);
}
promise_test(async t => {
const pc1 = new RTCPeerConnection({bundlePolicy: 'max-compat'});
t.add_cleanup(() => pc1.close());
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc2.close());
const stream = await getNoiseStream({ audio: true });
t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));
stream.getTracks().forEach(track => pc1.addTrack(track, stream));
exchangeIceCandidates(pc1, pc2);
exchangeOfferAnswerUnbundled(pc1, pc2);
await listenToConnected(pc1);
// https://github.com/w3c/webrtc-pc/issues/2678#issuecomment-948554126
let had_intermediary_connecting = false
let channel;
const onConnectionStateChange = t.step_func(() => {
const {connectionState, iceConnectionState} = pc1;
if (connectionState === 'connecting') {
had_intermediary_connecting = true;
}
});
pc1.addEventListener('connectionstatechange', onConnectionStateChange);
channel = pc1.createDataChannel('test');
await exchangeOfferAnswer(pc1, pc2);
await listenToConnected(pc1);
assert_true(had_intermediary_connecting, "state should re-pass connecting before reaching connected");
}, 'when adding a datachannel to an existing unbundled connected PC, it should go through a connecting state');
promise_test(async t => {
const pc1 = new RTCPeerConnection();
t.add_cleanup(() => pc1.close());
const pc2 = new RTCPeerConnection();
const stream = await getNoiseStream({ audio: true });
t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));
stream.getTracks().forEach(track => pc1.addTrack(track, stream));
exchangeIceCandidates(pc1, pc2);
exchangeOfferAnswer(pc1, pc2);
await listenToIceConnected(pc2);
pc2.onconnectionstatechange = t.unreached_func();
pc2.close();
assert_equals(pc2.connectionState, 'closed');
await new Promise(r => t.step_timeout(r, 100));
}, 'Closing a PeerConnection should not fire connectionstatechange event');
</script>
|
