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// Creates two RTCPeerConnection and tries to connect them. Returns
// "allowed" if the connection is permitted, "blocked" if it is
// blocked on both sides and "inconsistent" in the event that the
// result is not the same on both sides (should never happen).
async function tryConnect() {
const pc1 = new RTCPeerConnection();
const pc2 = new RTCPeerConnection();
// Returns a promise which resolves to a boolean which is true
// if and only if pc.iceConnectionState settles in the "failed"
// state, and never transitions to any state other than "new"
// or "failed."
const pcFailed = (pc) => {
return new Promise((resolve, _reject) => {
pc.oniceconnectionstatechange = (e) => {
resolve(pc.iceConnectionState == "failed");
};
});
}
pc1Failed = pcFailed(pc1);
pc2Failed = pcFailed(pc2);
// Creating a data channel is necessary to induce negotiation:
const channel = pc1.createDataChannel('test');
// Usual webrtc signaling dance:
pc1.onicecandidate = ({candidate}) => pc2.addIceCandidate(candidate);
pc2.onicecandidate = ({candidate}) => pc1.addIceCandidate(candidate);
const offer = await pc1.createOffer();
await pc1.setLocalDescription(offer);
await pc2.setRemoteDescription(pc1.localDescription);
const answer = await pc2.createAnswer();
await pc2.setLocalDescription(answer);
await pc1.setRemoteDescription(pc2.localDescription);
const failed1 = await pc1Failed;
const failed2 = await pc2Failed;
if(failed1 && failed2) {
return 'blocked';
} else if(!failed1 && !failed2) {
return 'allowed';
} else {
return 'inconsistent';
}
}
async function expectAllow() {
promise_test(async () => assert_equals(await tryConnect(), 'allowed'));
}
async function expectBlock() {
promise_test(async () => assert_equals(await tryConnect(), 'blocked'));
}
// vim: set ts=4 sw=4 et :