[英]WebRTC: Determine the chosen ICE candidate
我有一个的WebRTC应用程序,并假设两个客户端( client1
和client2
),有没有办法找出给出什么ICE候选client1
所使用的client2
,反之亦然? 因为,每次发现这一点,我都必须在客户端使用wireshark
,我认为阅读sdp
可能有所帮助,但我错了,因为它给了所有可能的候选人......
场景: client1的所有UDP
端口都被阻止(为了测试目的阻止了我)。
Client1的SDP:
...
a=rtcp:49407 IN IP4 <client1's IP>
a=candidate:3864409487 1 udp 2122194687 <client1's IP> 49407 typ host generation 0 // this would never work, since the udp ports are blocked...
a=candidate:3864409487 2 udp 2122194687 <client1's IP> 49407 typ host generation 0
a=candidate:2832583039 1 tcp 1518214911 <client1's IP> 0 typ host tcptype active generation 0
a=candidate:2832583039 2 tcp 1518214911 <client1's IP> 0 typ host tcptype active generation 0
a=candidate:973648460 1 udp 25042687 <TURN server IP> 64790 typ relay raddr <Proxy IP> rport 39963 generation 0
a=ice-ufrag:YSvrOiav8TglpCWD
...
好吧,从我对另一个问题的回答中提取
我编写并测试了以下代码,在firefox和chrome的最新版本中工作, getConnectionDetails
返回一个解析为连接细节的promise:
function getConnectionDetails(peerConnection){
var connectionDetails = {}; // the final result object.
if(window.chrome){ // checking if chrome
var reqFields = [ 'googLocalAddress',
'googLocalCandidateType',
'googRemoteAddress',
'googRemoteCandidateType'
];
return new Promise(function(resolve, reject){
peerConnection.getStats(function(stats){
var filtered = stats.result().filter(function(e){return e.id.indexOf('Conn-audio')==0 && e.stat('googActiveConnection')=='true'})[0];
if(!filtered) return reject('Something is wrong...');
reqFields.forEach(function(e){connectionDetails[e.replace('goog', '')] = filtered.stat(e)});
resolve(connectionDetails);
});
});
}else{ // assuming it is firefox
return peerConnection.getStats(null).then(function(stats){
var selectedCandidatePair = stats[Object.keys(stats).filter(function(key){return stats[key].selected})[0]]
, localICE = stats[selectedCandidatePair.localCandidateId]
, remoteICE = stats[selectedCandidatePair.remoteCandidateId];
connectionDetails.LocalAddress = [localICE.ipAddress, localICE.portNumber].join(':');
connectionDetails.RemoteAddress = [remoteICE.ipAddress, remoteICE.portNumber].join(':');
connectionDetails.LocalCandidateType = localICE.candidateType;
connectionDetails.RemoteCandidateType = remoteICE.candidateType;
return connectionDetails;
});
}
}
//usage example:
getConnectionDetails(pc).then(console.log.bind(console));
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