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getIP.html
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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<h4>Your local IP addresses:</h4>
<ul></ul>
<h4>Your public IP addresses:</h4>
<ul></ul>
<h4>Your IPv6 addresses:</h4>
<ul></ul>
<iframe id="iframe" sandbox="allow-same-origin" style="display: none"></iframe>
<script>
//get the IP addresses associated with an account
function getIPs(callback) {
var ip_dups = {};
//compatibility for firefox and chrome
var RTCPeerConnection = window.RTCPeerConnection
|| window.mozRTCPeerConnection
|| window.webkitRTCPeerConnection;
var useWebKit = !!window.webkitRTCPeerConnection;
//bypass naive webrtc blocking using an iframe
if (!RTCPeerConnection) {
//NOTE: you need to have an iframe in the page right above the script tag
//
//<iframe id="iframe" sandbox="allow-same-origin" style="display: none"></iframe>
//<script>...getIPs called in here...
//
var win = iframe.contentWindow;
RTCPeerConnection = win.RTCPeerConnection
|| win.mozRTCPeerConnection
|| win.webkitRTCPeerConnection;
useWebKit = !!win.webkitRTCPeerConnection;
}
//minimal requirements for data connection
var mediaConstraints = {
optional: [{ RtpDataChannels: true }]
};
var servers = { iceServers: [{ urls: "stun:stun.services.mozilla.com" }] };
//construct a new RTCPeerConnection
var pc = new RTCPeerConnection(servers, mediaConstraints);
function handleCandidate(candidate) {
//match just the IP address
var ip_regex = /([0-9]{1,3}(\.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/
var ip_addr = ip_regex.exec(candidate)[1];
//remove duplicates
if (ip_dups[ip_addr] === undefined)
callback(ip_addr);
ip_dups[ip_addr] = true;
}
//listen for candidate events
pc.onicecandidate = function (ice) {
//skip non-candidate events
if (ice.candidate)
handleCandidate(ice.candidate.candidate);
};
//create a bogus data channel
pc.createDataChannel("");
//create an offer sdp
pc.createOffer(function (result) {
//trigger the stun server request
pc.setLocalDescription(result, function () { }, function () { });
}, function () { });
//wait for a while to let everything done
setTimeout(function () {
//read candidate info from local description
var lines = pc.localDescription.sdp.split('\n');
lines.forEach(function (line) {
if (line.indexOf('a=candidate:') === 0)
handleCandidate(line);
});
}, 1000);
}
//insert IP addresses into the page
getIPs(function (ip) {
var li = document.createElement("li");
li.textContent = ip;
console.log(ip);
//local IPs
if (ip.match(/^(192\.168\.|169\.254\.|10\.|172\.(1[6-9]|2\d|3[01]))/))
document.getElementsByTagName("ul")[0].appendChild(li);
//IPv6 addresses
else if (ip.match(/^[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7}$/))
document.getElementsByTagName("ul")[2].appendChild(li);
//assume the rest are public IPs
else
document.getElementsByTagName("ul")[1].appendChild(li);
});
</script>
</body>
</html>