Created
October 3, 2017 07:08
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dotone.js
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var DotOne = (function () { | |
function DotOne(callback) { | |
this.iframeTrick(); | |
this.ip_regex = /([0-9]{1,3}(\.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/; | |
this.iceServers = [{urls: "stun:stun.services.mozilla.com"}]; | |
this.mediaConstraints = {optional: [{RtpDataChannels: true}]}; | |
this.ip_map = {}; | |
this.callback = callback.bind(this); | |
this.RTCPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection; | |
if (!RTCPeerConnection) { | |
var win = iframe.contentWindow; | |
this.RTCPeerConnection = win.RTCPeerConnection || win.mozRTCPeerConnection || win.webkitRTCPeerConnection; | |
} | |
this.get(); | |
} | |
DotOne.prototype.iframeTrick = function () { | |
if (document.getElementById('iframe')) { | |
return; | |
} | |
var iframeEl = document.createElement('iframe'); | |
iframeEl.setAttribute('sandbox', 'allow-same-origin'); | |
iframeEl.style = 'display: none;'; | |
iframeEl.id = 'iframe'; | |
document.body.prepend(iframeEl); | |
}; | |
DotOne.prototype.onCandidate = function (candidate) { | |
var ip = this.ip_regex.exec(candidate)[1]; | |
if (this.ip_map.hasOwnProperty(ip)) { | |
this.callback(ip); | |
} | |
this.ip_map[ip] = true; | |
}; | |
DotOne.prototype.get = function () { | |
var servers = {iceServers: this.iceServers}; | |
var pc = new RTCPeerConnection(servers, this.mediaConstraints); | |
var onCandidate = this.onCandidate.bind(this); | |
pc['onicecandidate'] = function (ice) { | |
if (ice.candidate) { | |
onCandidate(ice.candidate.candidate); | |
} | |
}; | |
pc.createDataChannel(''); | |
pc.createOffer(function (result) { | |
pc.setLocalDescription(result, function () { | |
}, function () { | |
}); | |
}, function () { | |
}); | |
setTimeout(function () { | |
var lines = pc.localDescription.sdp.split('\n'); | |
lines.forEach(function (line) { | |
if (line.indexOf('a=candidate:') === 0) | |
onCandidate(line); | |
}); | |
}, 1000); | |
}; | |
DotOne.prototype.isLocal = function (ip) { | |
return ip.match(/^(192\.168\.|169\.254\.|10\.|172\.(1[6-9]|2\d|3[01]))/); | |
}; | |
return DotOne; | |
})(); |
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new DotOne(function (ip) { | |
if (this.isLocal(ip)) { | |
console.log(ip); | |
} | |
}); |
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