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<!doctype html>
<meta charset=utf-8>
<title>RTCDataChannel id attribute</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script>
'use strict';
// This and the test below verify that after a description is set that
// negotiates the DTLS role used by SCTP, data channels with unset IDs
// have IDs set according to the rules in rtcweb-data-channel.
promise_test(test => {
const pc = new RTCPeerConnection;
const channel = pc.createDataChannel('');
return pc.createOffer()
.then(offer => pc.setLocalDescription(offer))
.then(() => {
// Turn our own offer SDP into valid answer SDP by setting the DTLS role to
// "active".
const answer = {
type: "answer",
sdp: pc.localDescription.sdp.replace("actpass", "active")
};
return pc.setRemoteDescription(answer);
})
.then(() => {
// Since the remote description had an "active" DTLS role, we're the server
// and should use odd data channel IDs, according to rtcweb-data-channel.
assert_equals(channel.id % 2, 1, 'id');
const another_channel = pc.createDataChannel('another');
assert_equals(another_channel.id % 2, 1, 'id');
assert_not_equals(channel.id, another_channel.id);
})
}, "DTLS client uses odd data channel IDs");
promise_test(test => {
const pc = new RTCPeerConnection;
const channel = pc.createDataChannel('');
return pc.createOffer()
.then(offer => pc.setLocalDescription(offer))
.then(() => {
// Turn our own offer SDP into valid answer SDP by setting the DTLS role to
// "passive".
const answer = {
type: "answer",
sdp: pc.localDescription.sdp.replace("actpass", "passive")
};
return pc.setRemoteDescription(answer);
})
.then(() => {
// Since the remote description had a "passive" DTLS role, we're the client
// and should use even data channel IDs, according to rtcweb-data-channel.
assert_equals(channel.id % 2, 0, 'id');
const another_channel = pc.createDataChannel('another');
assert_equals(another_channel.id % 2, 0, 'id');
assert_not_equals(channel.id, another_channel.id);
})
}, "DTLS server uses even data channel IDs");
</script>
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