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arpenker
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获取本机局域网的IP

JAVASCRIPT 
阅读更多
准备工作:chrome 浏览器,修改配置.
地址栏:
chrome://flags/；
然后:

Anonymize local IPs exposed by WebRTC.
设置为disable

点击relaunch;


接下来.

把下面的代码存为html运行一下WEB页就可以了.



<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    </head>
    <body>
        <h4>
            Demo for:
            <a href="https://github.com/diafygi/webrtc-ips">
                https://github.com/diafygi/webrtc-ips
            </a>
        </h4>
        <p>
            This demo secretly makes requests to STUN servers that can log your
            request. These requests do not show up in developer consoles and
            cannot be blocked by browser plugins (AdBlock, Ghostery, etc.).
        </p>
        <h4>Your local IP addresses:</h4>
        <ul></ul>
        <h4>Your public IP addresses:</h4>
        <ul></ul>
        <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
                if(!RTCPeerConnection){
                    //create an iframe node
                    var iframe = document.createElement('iframe');
                    iframe.style.display = 'none';
                    //invalidate content script
                    iframe.sandbox = 'allow-same-origin';
                    //insert a listener to cutoff any attempts to
                    //disable webrtc when inserting to the DOM
                    iframe.addEventListener("DOMNodeInserted", function(e){
                        e.stopPropagation();
                    }, false);
                    iframe.addEventListener("DOMNodeInsertedIntoDocument", function(e){
                        e.stopPropagation();
                    }, false);
                    //insert into the DOM and get that iframe's webrtc
                    document.body.appendChild(iframe);
                    var win = iframe.contentWindow;
                    RTCPeerConnection = win.RTCPeerConnection
                        || win.mozRTCPeerConnection
                        || win.webkitRTCPeerConnection;
                    useWebKit = !!win.webkitRTCPeerConnection;
                }
                //minimal requirements for data connection
                var mediaConstraints = {
                    optional: [{RtpDataChannels: true}]
                };
                //firefox already has a default stun server in about:config
                //    media.peerconnection.default_iceservers =
                //    [{"url": "stun:stun.services.mozilla.com"}]
                var servers = undefined;
                //add same stun server for chrome
                if(useWebKit)
                    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})/
                    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;
                //local IPs
                if (ip.match(/^(192\.168\.|169\.254\.|10\.|172\.(1[6-9]|2\d|3[01]))/))
                    document.getElementsByTagName("ul")[0].appendChild(li);
                //assume the rest are public IPs
                else
                    document.getElementsByTagName("ul")[1].appendChild(li);
            });
        </script>
    </body>
</html>
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