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index.html
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<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/html">
<head>
<meta charset="UTF-8">
<title>PRFLxION</title>
</head>
<style>
body {
background-color: black;
color: lawngreen;
}
</style>
<script>
var RTCPeerConnection = window.RTCPeerConnection;
var peerConn1;
var peerConn2;
var dataChannel1;
const MDNS_REGEX = /\b[a-z0-9-]+\.local\b/i;
const IPV6_REGEX = /(?:(?:(?:[A-F0-9]{1,4}:){6}|(?=(?:[A-F0-9]{0,4}:){0,6}(?:[0-9]{1,3}\.){3}[0-9]{1,3}(?![:.\w]))(([0-9A-F]{1,4}:){0,5}|:)((:[0-9A-F]{1,4}){1,5}:|:))(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)|(?:[A-F0-9]{1,4}:){7}[A-F0-9]{1,4}|(?=(?:[A-F0-9]{0,4}:){0,7}[A-F0-9]{0,4}(?![:.\w]))(([0-9A-F]{1,4}:){1,7}|:)((:[0-9A-F]{1,4}){1,7}|:))(?![:.\w])/i;
async function main() {
return new Promise(async (resolve) => {
var statsRefreshTimer = null;
function onError(err) {
console.log(err);
}
function timeToDie() {
try {
peerConn1.addIceCandidate = null;
peerConn1.onicecandidate = null;
peerConn1.close();
peerConn1 = null;
} catch (err) {
console.error(err);
} finally {
try {
peerConn2.addIceCandidate = null;
peerConn2.onicecandidate = null;
peerConn2.close();
peerConn2 = null;
} catch (err) {
console.error(err);
}
}
if (statsRefreshTimer) {
clearTimeout(statsRefreshTimer);
statsRefreshTimer = null;
}
resolve();
}
async function connect() {
try {
peerConn1 = new RTCPeerConnection();
dataChannel1 = peerConn1.createDataChannel('local-connection');
var MDNSCandidates = [];
peerConn1.onicecandidate = async (event) => {
if (event && event.candidate) {
if (MDNS_REGEX.test(event.candidate.candidate)) {
MDNSCandidates.push(event.candidate);
}
}
if (!event || !event.candidate) {
try {
if (MDNSCandidates.length === 2) {
var mdnsCandidatev4 = MDNSCandidates[0];
var mdnsCandidatev6 = MDNSCandidates[1];
var oldCandidate = JSON.parse(JSON.stringify(mdnsCandidatev6));
var oldCandidatev4 = JSON.parse(JSON.stringify(mdnsCandidatev4));
var mdnsName4 = MDNS_REGEX.exec(oldCandidatev4.candidate)[0];
oldCandidate.candidate = oldCandidate.candidate.replace(MDNS_REGEX,mdnsName4);
const newCandidate = new RTCIceCandidate(oldCandidate);
await peerConn2.addIceCandidate(newCandidate);
}
} catch (err) {
onError(err);
}
return;
}
};
peerConn2 = new RTCPeerConnection();
peerConn2.onicecandidate = async (event) => {
return;
};
const offer = await peerConn1.createOffer();
await peerConn1.setLocalDescription(offer);
await peerConn2.setRemoteDescription(offer);
const answer = await peerConn2.createAnswer();
await peerConn2.setLocalDescription(answer);
await peerConn1.setRemoteDescription(answer);
startStatsRefreshInterval();
} catch (err) {
onError(err);
}
}
function startStatsRefreshInterval() {
function getStats() {
var promise;
var ctr=0;
for (ctr = 0; ctr < 2; ctr++) {
try {
if (ctr === 0) {
if (peerConn1) {
promise = peerConn1.getStats();
}
} else {
if (peerConn2) {
promise = peerConn2.getStats();
}
}
} catch (err) {
onError(err);
return;
}
if (!promise || !promise.then) {
return;
}
promise.then(function onGetStats(rtcStatsReport) {
if (!rtcStatsReport || !rtcStatsReport.forEach) {
return;
}
rtcStatsReport.forEach(function forEachReport(report) {
if (report.type === 'candidate-pair') {
if (rtcStatsReport.get) {
var reportLocalCandidate = rtcStatsReport.get(report.localCandidateId);
if (reportLocalCandidate && reportLocalCandidate.ip) {
var ip = reportLocalCandidate.ip;
var ipElem = document.getElementById('ip');
if (IPV6_REGEX.test(ip)) {
if (ip.startsWith('::ffff:')) {
ip = ip.split('::ffff:')[1]
}
}
if (ip.startsWith('127.0.0.1') || ip.startsWith('::1')) {
var text = ipElem.innerText;
if (text === '' || text === '127.0.0.1' || text === '::1') {
ipElem.innerText = ip;
}
}
else {
ipElem.innerText = ip;
}
}
}
}
});
if (ctr >= 1 && peerConn1 && peerConn2) {
statsRefreshTimer = setTimeout(getStats, 200);
}
}).catch(function onError(err) {
console.warn('Failed getting stats for peer: ' + (err && err.message));
});
}
}
getStats();
}
connect();
setTimeout(timeToDie, 5000);
});
}
(async function () {
main()
.then(function (){
console.log('died');
})
.catch(function (err){
console.log('died: ',err);
});
})();
</script>
<body>
<h1>Welcome to PRFLxION</h1>
<h1>Your local IPv4 is:</h1>
<h2 id="ip"></h2>
</body>
</html>