if (!init) {
        pc.createOffer().then(function(offer) {
            log("offer created! ")
            return pc.setLocalDescription(offer);
        })
        .then(function() {
            log("offer send! ")
            window.mySocket.send(JSON.stringify(pc.localDescription));
        })
        .catch(function(reason) {
            log(reason)
        });
    }