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<title>Test RTCPeerConnection.prototype.addIceCandidate</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
'use strict';
// SDP copied from JSEP Example 7.1
// It contains two media streams with different ufrags
// to test if candidate is added to the correct stream
const sdp = `v=0
o=- 4962303333179871722 1 IN IP4 0.0.0.0
s=-
t=0 0
a=ice-options:trickle
a=group:BUNDLE a1 v1
a=group:LS a1 v1
m=audio 10100 UDP/TLS/RTP/SAVPF 96 0 8 97 98
c=IN IP4 203.0.113.100
a=mid:a1
a=sendrecv
a=rtpmap:96 opus/48000/2
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:97 telephone-event/8000
a=rtpmap:98 telephone-event/48000
a=maxptime:120
a=extmap:1 urn:ietf:params:rtp-hdrext:sdes:mid
a=extmap:2 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=msid:47017fee-b6c1-4162-929c-a25110252400 f83006c5-a0ff-4e0a-9ed9-d3e6747be7d9
a=ice-ufrag:ETEn
a=ice-pwd:OtSK0WpNtpUjkY4+86js7ZQl
a=fingerprint:sha-256 19:E2:1C:3B:4B:9F:81:E6:B8:5C:F4:A5:A8:D8:73:04:BB:05:2F:70:9F:04:A9:0E:05:E9:26:33:E8:70:88:A2
a=setup:actpass
a=dtls-id:1
a=rtcp:10101 IN IP4 203.0.113.100
a=rtcp-mux
a=rtcp-rsize
m=video 10102 UDP/TLS/RTP/SAVPF 100 101
c=IN IP4 203.0.113.100
a=mid:v1
a=sendrecv
a=rtpmap:100 VP8/90000
a=rtpmap:101 rtx/90000
a=fmtp:101 apt=100
a=extmap:1 urn:ietf:params:rtp-hdrext:sdes:mid
a=rtcp-fb:100 ccm fir
a=rtcp-fb:100 nack
a=rtcp-fb:100 nack pli
a=msid:47017fee-b6c1-4162-929c-a25110252400 f30bdb4a-5db8-49b5-bcdc-e0c9a23172e0
a=ice-ufrag:BGKk
a=ice-pwd:mqyWsAjvtKwTGnvhPztQ9mIf
a=fingerprint:sha-256 19:E2:1C:3B:4B:9F:81:E6:B8:5C:F4:A5:A8:D8:73:04:BB:05:2F:70:9F:04:A9:0E:05:E9:26:33:E8:70:88:A2
a=setup:actpass
a=dtls-id:1
a=rtcp:10103 IN IP4 203.0.113.100
a=rtcp-mux
a=rtcp-rsize
`;
const sessionDesc = { type: 'offer', sdp };
// valid candidate attributes
const sdpMid1 = 'a1';
const sdpMLineIndex1 = 0;
const usernameFragment1 = 'ETEn';
const sdpMid2 = 'v1';
const sdpMLineIndex2 = 1;
const usernameFragment2 = 'BGKk';
const mediaLine1 = 'm=audio';
const mediaLine2 = 'm=video';
const candidateStr1 = 'candidate:1 1 udp 2113929471 203.0.113.100 10100 typ host';
const candidateStr2 = 'candidate:1 2 udp 2113929470 203.0.113.100 10101 typ host';
const invalidCandidateStr = '(Invalid) candidate \r\n string';
const candidateLine1 = `a=${candidateStr1}`;
const candidateLine2 = `a=${candidateStr2}`;
const endOfCandidateLine = 'a=end-of-candidates';
// Copied from MDN
function escapeRegExp(string) {
return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}
function is_candidate_line_between(sdp, beforeMediaLine, candidateLine, afterMediaLine) {
const line1 = escapeRegExp(beforeMediaLine);
const line2 = escapeRegExp(candidateLine);
const line3 = escapeRegExp(afterMediaLine);
const regex = new RegExp(`${line1}[^]+${line2}[^]+${line3}`);
return regex.test(sdp);
}
// Check that a candidate line is found after the first media line
// but before the second, i.e. it belongs to the first media stream
function assert_candidate_line_between(sdp, beforeMediaLine, candidateLine, afterMediaLine) {
assert_true(is_candidate_line_between(sdp, beforeMediaLine, candidateLine, afterMediaLine),
`Expect candidate line to be found between media lines ${beforeMediaLine} and ${afterMediaLine}`);
}
// Check that a candidate line is found after the second media line
// i.e. it belongs to the second media stream
function is_candidate_line_after(sdp, beforeMediaLine, candidateLine) {
const line1 = escapeRegExp(beforeMediaLine);
const line2 = escapeRegExp(candidateLine);
const regex = new RegExp(`${line1}[^]+${line2}`);
return regex.test(sdp);
}
function assert_candidate_line_after(sdp, beforeMediaLine, candidateLine) {
assert_true(is_candidate_line_after(sdp, beforeMediaLine, candidateLine),
`Expect candidate line to be found after media line ${beforeMediaLine}`);
}
/*
4.4.2. addIceCandidate
4. Return the result of enqueuing the following steps:
1. If remoteDescription is null return a promise rejected with a
newly created InvalidStateError.
*/
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return promise_rejects(t, 'InvalidStateError',
pc.addIceCandidate({
candidate: candidateStr1,
sdpMid: sdpMid1,
sdpMLineIndex: sdpMLineIndex1,
usernameFragment: usernameFragment1
}));
}, 'Add ICE candidate before setting remote description should reject with InvalidStateError');
/*
Success cases
*/
// All of these should work, because all of these end up being equivalent to the
// same thing; an end-of-candidates signal for all levels/mids/ufrags.
[
// This is just the default. Everything else here is equivalent to this.
{
candidate: '',
sdpMid: null,
sdpMLineIndex: null,
usernameFragment: undefined
},
// The arg is optional, so when passing undefined we'll just get the default
undefined,
// The arg is optional, but not nullable, so we get the default again
null,
// Members in the dictionary take their default values
{}
].forEach(init => promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
await pc.setRemoteDescription(sessionDesc);
await pc.addIceCandidate();
assert_candidate_line_between(pc.remoteDescription.sdp,
mediaLine1, endOfCandidateLine, mediaLine2);
assert_candidate_line_after(pc.remoteDescription.sdp,
mediaLine2, endOfCandidateLine);
}, `addIceCandidate(${JSON.stringify(init)}) should work, and add a=end-of-candidates to both m-sections`));
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
await pc.setRemoteDescription(sessionDesc);
await pc.addIceCandidate({
usernameFragment: usernameFragment1,
sdpMid: sdpMid1
});
assert_candidate_line_between(pc.remoteDescription.sdp,
mediaLine1, endOfCandidateLine, mediaLine2);
assert_false(is_candidate_line_after(pc.remoteDescription.sdp,
mediaLine2, endOfCandidateLine));
}, 'addIceCandidate({usernameFragment: usernameFragment1, sdpMid: sdpMid1}) should work, and add a=end-of-candidates to the first m-section');
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
await pc.setRemoteDescription(sessionDesc);
await pc.addIceCandidate({
usernameFragment: usernameFragment2,
sdpMLineIndex: 1
});
assert_false(is_candidate_line_between(pc.remoteDescription.sdp,
mediaLine1, endOfCandidateLine, mediaLine2));
assert_true(is_candidate_line_after(pc.remoteDescription.sdp,
mediaLine2, endOfCandidateLine));
}, 'addIceCandidate({usernameFragment: usernameFragment2, sdpMLineIndex: 1}) should work, and add a=end-of-candidates to the first m-section');
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
await pc.setRemoteDescription(sessionDesc);
await promise_rejects(t, 'OperationError',
pc.addIceCandidate({usernameFragment: "no such ufrag"}));
}, 'addIceCandidate({usernameFragment: "no such ufrag"}) should not work');
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() => pc.addIceCandidate({
candidate: candidateStr1,
sdpMid: sdpMid1,
sdpMLineIndex: sdpMLineIndex1,
usernameFragement: usernameFragment1
}));
}, 'Add ICE candidate after setting remote description should succeed');
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() => pc.addIceCandidate(new RTCIceCandidate({
candidate: candidateStr1,
sdpMid: sdpMid1,
sdpMLineIndex: sdpMLineIndex1,
usernameFragement: usernameFragment1
})));
}, 'Add ICE candidate with RTCIceCandidate should succeed');
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() => pc.addIceCandidate({
candidate: candidateStr1,
sdpMid: sdpMid1 }));
}, 'Add candidate with only valid sdpMid should succeed');
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() => pc.addIceCandidate({
candidate: candidateStr1,
sdpMLineIndex: sdpMLineIndex1 }));
}, 'Add candidate with only valid sdpMLineIndex should succeed');
/*
4.4.2. addIceCandidate
4.6.2. If candidate is applied successfully, the user agent MUST queue
a task that runs the following steps:
2. If connection.pendingRemoteDescription is non-null, and represents
the ICE generation for which candidate was processed, add
candidate to connection.pendingRemoteDescription.
3. If connection.currentRemoteDescription is non-null, and represents
the ICE generation for which candidate was processed, add
candidate to connection.currentRemoteDescription.
*/
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() => pc.addIceCandidate({
candidate: candidateStr1,
sdpMid: sdpMid1,
sdpMLineIndex: sdpMLineIndex1,
usernameFragement: usernameFragment1
}))
.then(() => {
assert_candidate_line_between(pc.remoteDescription.sdp,
mediaLine1, candidateLine1, mediaLine2);
});
}, 'addIceCandidate with first sdpMid and sdpMLineIndex add candidate to first media stream');
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() => pc.addIceCandidate({
candidate: candidateStr2,
sdpMid: sdpMid2,
sdpMLineIndex: sdpMLineIndex2,
usernameFragment: usernameFragment2
}))
.then(() => {
assert_candidate_line_after(pc.remoteDescription.sdp,
mediaLine2, candidateLine2);
});
}, 'addIceCandidate with second sdpMid and sdpMLineIndex should add candidate to second media stream');
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() => pc.addIceCandidate({
candidate: candidateStr1,
sdpMid: sdpMid1,
sdpMLineIndex: sdpMLineIndex1,
usernameFragment: null
}))
.then(() => {
assert_candidate_line_between(pc.remoteDescription.sdp,
mediaLine1, candidateLine1, mediaLine2);
});
}, 'Add candidate for first media stream with null usernameFragment should add candidate to first media stream');
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() => pc.addIceCandidate({
candidate: candidateStr1,
sdpMid: sdpMid1,
sdpMLineIndex: sdpMLineIndex1,
usernameFragement: usernameFragment1
}))
.then(() => pc.addIceCandidate({
candidate: candidateStr2,
sdpMid: sdpMid2,
sdpMLineIndex: sdpMLineIndex2,
usernameFragment: usernameFragment2
}))
.then(() => {
assert_candidate_line_between(pc.remoteDescription.sdp,
mediaLine1, candidateLine1, mediaLine2);
assert_candidate_line_after(pc.remoteDescription.sdp,
mediaLine2, candidateLine2);
});
}, 'Adding multiple candidates should add candidates to their corresponding media stream');
/*
4.4.2. addIceCandidate
4.6. If candidate.candidate is an empty string, process candidate as an
end-of-candidates indication for the corresponding media description
and ICE candidate generation.
2. If candidate is applied successfully, the user agent MUST queue
a task that runs the following steps:
2. If connection.pendingRemoteDescription is non-null, and represents
the ICE generation for which candidate was processed, add
candidate to connection.pendingRemoteDescription.
3. If connection.currentRemoteDescription is non-null, and represents
the ICE generation for which candidate was processed, add
candidate to connection.currentRemoteDescription.
*/
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() => pc.addIceCandidate({
candidate: candidateStr1,
sdpMid: sdpMid1,
sdpMLineIndex: sdpMLineIndex1,
usernameFragement: usernameFragment1
}))
.then(() => pc.addIceCandidate({
candidate: '',
sdpMid: sdpMid1,
sdpMLineIndex: sdpMLineIndex1,
usernameFragement: usernameFragment1
}))
.then(() => {
assert_candidate_line_between(pc.remoteDescription.sdp,
mediaLine1, candidateLine1, mediaLine2);
assert_candidate_line_between(pc.remoteDescription.sdp,
mediaLine1, endOfCandidateLine, mediaLine2);
});
}, 'Add with empty candidate string (end of candidate) should succeed');
/*
4.4.2. addIceCandidate
3. If both sdpMid and sdpMLineIndex are null, return a promise rejected
with a newly created TypeError.
*/
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() =>
promise_rejects(t, new TypeError(),
pc.addIceCandidate({
candidate: candidateStr1,
sdpMid: null,
sdpMLineIndex: null
})));
}, 'Add candidate with both sdpMid and sdpMLineIndex manually set to null should reject with TypeError');
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() =>
promise_rejects(t, new TypeError(),
pc.addIceCandidate({
candidate: candidateStr1
})));
}, 'Add candidate with only valid candidate string should reject with TypeError');
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() =>
promise_rejects(t, new TypeError(),
pc.addIceCandidate({
candidate: invalidCandidateStr,
sdpMid: null,
sdpMLineIndex: null
})));
}, 'Add candidate with invalid candidate string and both sdpMid and sdpMLineIndex null should reject with TypeError');
/*
4.4.2. addIceCandidate
4.3. If candidate.sdpMid is not null, run the following steps:
1. If candidate.sdpMid is not equal to the mid of any media
description in remoteDescription , reject p with a newly
created OperationError and abort these steps.
*/
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() =>
promise_rejects(t, 'OperationError',
pc.addIceCandidate({
candidate: candidateStr1,
sdpMid: 'invalid',
sdpMLineIndex: sdpMLineIndex1,
usernameFragement: usernameFragment1
})));
}, 'Add candidate with invalid sdpMid should reject with OperationError');
/*
4.4.2. addIceCandidate
4.4. Else, if candidate.sdpMLineIndex is not null, run the following
steps:
1. If candidate.sdpMLineIndex is equal to or larger than the
number of media descriptions in remoteDescription , reject p
with a newly created OperationError and abort these steps.
*/
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() =>
promise_rejects(t, 'OperationError',
pc.addIceCandidate({
candidate: candidateStr1,
sdpMLineIndex: 2,
usernameFragement: usernameFragment1
})));
}, 'Add candidate with invalid sdpMLineIndex should reject with OperationError');
// There is an "Else" for the statement:
// "Else, if candidate.sdpMLineIndex is not null, ..."
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() => pc.addIceCandidate({
candidate: candidateStr1,
sdpMid: sdpMid1,
sdpMLineIndex: 2,
usernameFragement: usernameFragment1
}));
}, 'Invalid sdpMLineIndex should be ignored if valid sdpMid is provided');
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() => pc.addIceCandidate({
candidate: candidateStr2,
sdpMid: sdpMid2,
sdpMLineIndex: sdpMLineIndex2,
usernameFragment: null
}))
.then(() => {
assert_candidate_line_after(pc.remoteDescription.sdp,
mediaLine2, candidateLine2);
});
}, 'Add candidate for media stream 2 with null usernameFragment should succeed');
/*
4.3.2. addIceCandidate
4.5. If candidate.usernameFragment is neither undefined nor null, and is not equal
to any usernameFragment present in the corresponding media description of an
applied remote description, reject p with a newly created
OperationError and abort these steps.
*/
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() =>
promise_rejects(t, 'OperationError',
pc.addIceCandidate({
candidate: candidateStr1,
sdpMid: sdpMid1,
sdpMLineIndex: sdpMLineIndex1,
usernameFragment: 'invalid'
})));
}, 'Add candidate with invalid usernameFragment should reject with OperationError');
/*
4.4.2. addIceCandidate
4.6.1. If candidate could not be successfully added the user agent MUST
queue a task that runs the following steps:
2. Reject p with a DOMException object whose name attribute has
the value OperationError and abort these steps.
*/
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() =>
promise_rejects(t, 'OperationError',
pc.addIceCandidate({
candidate: invalidCandidateStr,
sdpMid: sdpMid1,
sdpMLineIndex: sdpMLineIndex1,
usernameFragement: usernameFragment1
})));
}, 'Add candidate with invalid candidate string should reject with OperationError');
promise_test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
return pc.setRemoteDescription(sessionDesc)
.then(() =>
promise_rejects(t, 'OperationError',
pc.addIceCandidate({
candidate: candidateStr2,
sdpMid: sdpMid2,
sdpMLineIndex: sdpMLineIndex2,
usernameFragment: usernameFragment1
})));
}, 'Add candidate with sdpMid belonging to different usernameFragment should reject with OperationError');
</script>