My simple WebRTC JavaScript code is not working properly. In fact, the audio call is not established (note that I have minimal knowledge of WebRTC, I created this by looking at examples on the Internet). The page should initiate a sound call between two participants. As a signal server between the participants, I used a websocket server. This server only sends messages between members. During call initiation, messages are actually sent (one proposal, several candidates, one answer and other candidates) via websocket.
However, Firefox gives me "ICE failed, see O: webrtc for more details." Both participants are behind regular routers.
I will add the log of my websocket server and an example approximately: webrtc (shortened, of course) as soon as possible.
Why is this code not working? What did I miss?
My code (keep in mind that this only works in firefox):
ws = new WebSocket("ws://" + location.hostname + ":9000");
navigator.getUserMedia = function(a, b){ return navigator.mozGetUserMedia(a, b, error);};
offerOptions = {offerToRecieveAudio: 1, offerToRecieveVideo: 1};
var pc = new RTCPeerConnection({"iceServers": [
{url:'stun:stun.l.google.com:19302'},
{url:'stun:stunserver.org'},
]});
pc.onaddstream = function(obj) {
if (obj.stream instanceof LocalMediaStream) return;
var audio = document.createElement("audio");
audio.controls = "true";
audio.autoplay = "true";
document.body.appendChild(audio);
audio.srcObject = obj.stream;
}
pc.onicecandidate = function(evt){
if (!evt.candidate) return;
console.log(evt.candidate);
ws.send(JSON.stringify(evt.candidate));
}
function endCall() {
var audios = document.getElementsByTagName("audio");
for (var i = 0; i < audios.length; i++) {
audios[i].pause();
}
pc.close();
}
function error(err) {
endCall();
}
function startCall(){
navigator.getUserMedia({audio: true}, function(stream) {
pc.onaddstream({stream: stream});
pc.addStream(stream);
pc.createOffer(function(offer) {
pc.setLocalDescription(new RTCSessionDescription(offer),function() {
ws.send(JSON.stringify(offer));
}, error, offerOptions);
}, error);
});
}
ws.onmessage = function(message){
var m = JSON.parse(message.data);
console.log(m);
if (m.type){
if (m.type == "offer"){
navigator.getUserMedia({audio: true}, function(stream) {
pc.onaddstream({stream: stream});
pc.addStream(stream);
pc.setRemoteDescription(new RTCSessionDescription(m), function() {
pc.createAnswer(function(answer) {
pc.setLocalDescription(new RTCSessionDescription(answer), function() {
ws.send(JSON.stringify(answer));
}, error);
}, error, offerOptions);
}, error);
});
}
if (m.type == "answer"){
pc.setRemoteDescription(new RTCSessionDescription(m), function() { }, error);
}
}
if (m.candidate){
pc.addIceCandidate(new RTCIceCandidate(m));
}
};
To initiate a call, you must call only the correctly named startCall()-function.
Relationship between two messages (ip removed):
Client connecting: tcp:ip1:62322
Client connecting: tcp:ip2:50075
Text message received: {"type":"offer","sdp":"v=0\r\no=mozilla...THIS_IS_SDPARTA-45.0.2 8467526262723029465 0 IN IP4 0.0.0.0\r\ns=-\r\nt=0 0\r\na=fingerprint:sha-256 8E:FC:F3:42:12:68:95:13:98:CC:B0:8D:41:F6:4E:39:19:60:70:5A:4B:4A:9D:93:4C:A0:53:CF:58:AB:3F:A1\r\na=ice-options:trickle\r\na=msid-semantic:WMS *\r\nm=audio 9 UDP/TLS/RTP/SAVPF 109 9 0 8\r\nc=IN IP4 0.0.0.0\r\na=sendrecv\r\na=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level\r\na=ice-pwd:0a7123357b97345c6f9a9474aabf0c27\r\na=ice-ufrag:5d02cec2\r\na=mid:sdparta_0\r\na=msid:{512da0cd-689a-4981-9d88-9e857ba62803} {f7e81293-42b4-44e1-9d5b-80afe2857cf8}\r\na=rtcp-mux\r\na=rtpmap:109 opus/48000/2\r\na=rtpmap:9 G722/8000/1\r\na=rtpmap:0 PCMU/8000\r\na=rtpmap:8 PCMA/8000\r\na=setup:actpass\r\na=ssrc:2285633480 cname:{90d0392b-c8f1-4be9-af57-8c34d08567cd}\r\n"}
Text message received: {"candidate":"candidate:0 1 UDP 2122187007 localip2 51858 typ host","sdpMid":"sdparta_0","sdpMLineIndex":0}
Text message received: {"candidate":"candidate:7 1 UDP 2122252543 ipv6-2 51859 typ host","sdpMid":"sdparta_0","sdpMLineIndex":0}
Text message received: {"candidate":"candidate:0 2 UDP 2122187006 ip2 51860 typ host","sdpMid":"sdparta_0","sdpMLineIndex":0}
Text message received: {"candidate":"candidate:7 2 UDP 2122252542 ipv6-2 52724 typ host","sdpMid":"sdparta_0","sdpMLineIndex":0}
Text message received: {"candidate":"candidate:2 1 UDP 1685987327 ip2 51858 typ srflx raddr localip2 rport 51858","sdpMid":"sdparta_0","sdpMLineIndex":0}
Text message received: {"candidate":"candidate:2 2 UDP 1685987326 ip2 51860 typ srflx raddr localip2 rport 51860","sdpMid":"sdparta_0","sdpMLineIndex":0}
Text message received: {"type":"answer","sdp":"v=0\r\no=mozilla...THIS_IS_SDPARTA-45.0.2 1868980908691513816 0 IN IP4 0.0.0.0\r\ns=-\r\nt=0 0\r\na=fingerprint:sha-256 04:2A:EB:AD:90:95:A3:A8:B8:3A:76:FE:3A:E7:DA:1F:D6:77:30:8A:87:BB:B9:3A:30:B4:9B:3D:E5:8F:58:04\r\na=ice-options:trickle\r\na=msid-semantic:WMS *\r\nm=audio 9 UDP/TLS/RTP/SAVPF 109\r\nc=IN IP4 0.0.0.0\r\na=sendrecv\r\na=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level\r\na=ice-pwd:b5665ac44d79e66c392408e08bdc32ee\r\na=ice-ufrag:1a8f59a4\r\na=mid:sdparta_0\r\na=msid:{358aa02b-b035-41a8-acf6-2b787a192c60} {28e8765a-4a56-42e3-8f45-897ca7c99c05}\r\na=rtcp-mux\r\na=rtpmap:109 opus/48000/2\r\na=setup:active\r\na=ssrc:3277858225 cname:{8cee2fed-1a9e-46b9-90d7-3cad80050f3b}\r\n"}
Text message received: {"candidate":"candidate:0 1 UDP 2122252543 localip1 59706 typ host","sdpMid":"sdparta_0","sdpMLineIndex":0}
Text message received: {"candidate":"candidate:1 1 UDP 1686052863 ip1 59706 typ srflx raddr localip1 rport 59706","sdpMid":"sdparta_0","sdpMLineIndex":0}