webrtc - STUN/TURN サーバー接続テスト

Question

STUN/TURN サーバーが稼働しており、接続に適切に応答しているかどうかをテストする方法を見つけようとしています。STUN/TURN マシンがダウンしている場合に備えて、このテストは外部マシンから実行するのが理想的です。

過去にこのケースを調べた人はいますか？どのようなソリューションが推奨されますか?

Answer 1

編集：コメントから別の回答へのgithub.ioの素敵な実装（IceTransports値で「リレー」を選択）：

Test TURN Server

---

Benjamin Trent のアドバイスに従って、TURN サーバーの接続をテストするために以下のコードを書きました。firefox と chrome の両方で動作します。

function checkTURNServer(turnConfig, timeout){ 

  return new Promise(function(resolve, reject){

    setTimeout(function(){
        if(promiseResolved) return;
        resolve(false);
        promiseResolved = true;
    }, timeout || 5000);

    var promiseResolved = false
      , myPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection   //compatibility for firefox and chrome
      , pc = new myPeerConnection({iceServers:[turnConfig]})
      , noop = function(){};
    pc.createDataChannel("");    //create a bogus data channel
    pc.createOffer(function(sdp){
      if(sdp.sdp.indexOf('typ relay') > -1){ // sometimes sdp contains the ice candidates...
        promiseResolved = true;
        resolve(true);
      }
      pc.setLocalDescription(sdp, noop, noop);
    }, noop);    // create offer and set local description
    pc.onicecandidate = function(ice){  //listen for candidate events
      if(promiseResolved || !ice || !ice.candidate || !ice.candidate.candidate || !(ice.candidate.candidate.indexOf('typ relay')>-1))  return;
      promiseResolved = true;
      resolve(true);
    };
  });   
}

使用例:

checkTURNServer({
    urls: 'turn:127.0.0.1',
    username: 'test',
    credential: 'test'
}).then(function(bool){
    console.log('is TURN server active? ', bool? 'yes':'no');
}).catch(console.error.bind(console));

以下のスニペットを実行して確認できます。

var res = id('result');

id('button').onclick = function(){
	res.innerHTML = 'Checking TURN Server...';
  var url = 'turn:'+id('url').value+':'+id('port').value,
  		useUDP = id('udp').checked;
  url +='?transport=' + (useUDP ? 'udp': 'tcp');
  checkTURNServer({
      urls: url,
      username: id('name').value, 
      credential: id('pass').value
  }, id('time').value).then(function(bool){
  		if(bool)
         res.innerHTML = 'Yep, the TURN server works...';
      else
         throw new Error('Doesn\'t work');
  }).catch(function(e){
  	 console.log(e);
     res.innerHTML = 'TURN server does not work.';
  });
};


function checkTURNServer(turnConfig, timeout){ 
	console.log('turnConfig: ', turnConfig);
  return new Promise(function(resolve, reject){

    setTimeout(function(){
        if(promiseResolved) return;
        resolve(false);
        promiseResolved = true;
    }, timeout || 5000);

    var promiseResolved = false
      , myPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection   //compatibility for firefox and chrome
      , pc = new myPeerConnection({iceServers:[turnConfig]})
      , noop = function(){};
    pc.createDataChannel("");    //create a bogus data channel
    pc.createOffer(function(sdp){
      if(sdp.sdp.indexOf('typ relay') > -1){ // sometimes sdp contains the ice candidates...
        promiseResolved = true;
        resolve(true);
      }
      pc.setLocalDescription(sdp, noop, noop);
    }, noop);    // create offer and set local description
    pc.onicecandidate = function(ice){  //listen for candidate events
      if(promiseResolved || !ice || !ice.candidate || !ice.candidate.candidate || !(ice.candidate.candidate.indexOf('typ relay')>-1))  return;
      promiseResolved = true;
      resolve(true);
    };
  });   
}


function id(val){
	return document.getElementById(val);
}

#url{
  width: 250px;
}
#port{
  width: 70px;
}

<h1>
 Test TURN server
</h1>
<div>
TURN URL: <input id='url' placeholder='example.com  or  xxx.yyy.rrr.ddd'  />
Port: <input type='number' value='3478' id='port' placeholder='enter a port number' />
</div>
<div>
Transport: <input type="radio" name="transport" id="tcp" value="tcp" /> TCP
<input type="radio" name="transport" id="udp" value="udp" checked/>UDP
</div>

<div>
Username: <input id="name" placeholder="turn username" />
</div>
<div>
password: <input id="pass" placeholder="turn password" />
</div>

<div>
checking Timeout: <input type='number'  id="time" placeholder="wait time  before checking timeout" value=5000 />
</div>
<div>
<button id='button'>
Check TURN Server
</button>
</div>

<h4 id='result'></h4>

Answer 2

ここでTURNサーバーとSTUNサーバーをテストしてください