我试图使一个点对点的Javascript游戏，可以在移动的浏览器上玩。

• 我已经能够成功地在本地WiFi网络内的两部手机之间建立P2P连接。
• 我无法通过移动的网络连接两部手机，或者一部在WiFi上，一部在移动网络上。
• 我试着关闭Windows防火墙，无法在移动的网络上将PC连接到手机。
• 我试着让两个对等体建立自己的数据通道，并设置协商。

我读到80%到90%的设备能够通过WebRTC连接，而不需要TURN服务器，所以我完全不知道下一步该怎么做。
桌面：Google Chrome 79.0.3945.130（官方版本）（64位）（队列：稳定）
移动的（像素3/Android 10）：谷歌浏览器

移动的网络

Time    Event
1/24/2020, 11:58:17 PM  createLocalDataChannel
label: Test, reliable: true
1/24/2020, 11:58:17 PM  negotiationneeded
1/24/2020, 11:58:17 PM  createOffer
1/24/2020, 11:58:17 PM  createOfferOnSuccess
1/24/2020, 11:58:17 PM  setLocalDescription
1/24/2020, 11:58:17 PM  signalingstatechange
1/24/2020, 11:58:17 PM  setLocalDescriptionOnSuccess
1/24/2020, 11:58:17 PM  icegatheringstatechange
1/24/2020, 11:58:17 PM  icecandidate (host)
1/24/2020, 11:58:17 PM  icecandidate (srflx)
1/24/2020, 11:58:17 PM  setRemoteDescription
1/24/2020, 11:58:17 PM  addIceCandidate (host)
1/24/2020, 11:58:17 PM  signalingstatechange
1/24/2020, 11:58:17 PM  setRemoteDescriptionOnSuccess
1/24/2020, 11:58:17 PM  iceconnectionstatechange
1/24/2020, 11:58:17 PM  iceconnectionstatechange (legacy)
1/24/2020, 11:58:17 PM  connectionstatechange
1/24/2020, 11:58:18 PM  addIceCandidate (srflx)
1/24/2020, 11:58:33 PM  iceconnectionstatechange
disconnected
1/24/2020, 11:58:33 PM  iceconnectionstatechange (legacy)
failed
1/24/2020, 11:58:33 PM  connectionstatechange
failed

无线网络

Time    Event
1/25/2020, 12:02:45 AM  
createLocalDataChannel
label: Test, reliable: true
1/25/2020, 12:02:45 AM  negotiationneeded
1/25/2020, 12:02:45 AM  createOffer
1/25/2020, 12:02:45 AM  createOfferOnSuccess
1/25/2020, 12:02:45 AM  setLocalDescription
1/25/2020, 12:02:45 AM  signalingstatechange
1/25/2020, 12:02:45 AM  setLocalDescriptionOnSuccess
1/25/2020, 12:02:45 AM  icegatheringstatechange
1/25/2020, 12:02:45 AM  icecandidate (host)
1/25/2020, 12:02:45 AM  icecandidate (srflx)
1/25/2020, 12:02:46 AM  setRemoteDescription
1/25/2020, 12:02:46 AM  signalingstatechange
1/25/2020, 12:02:46 AM  setRemoteDescriptionOnSuccess
1/25/2020, 12:02:46 AM  icegatheringstatechange
1/25/2020, 12:02:46 AM  addIceCandidate (host)
1/25/2020, 12:02:46 AM  iceconnectionstatechange
1/25/2020, 12:02:46 AM  iceconnectionstatechange (legacy)
1/25/2020, 12:02:46 AM  connectionstatechange
1/25/2020, 12:02:46 AM  addIceCandidate (srflx)
1/25/2020, 12:02:46 AM  iceconnectionstatechange
connected
1/25/2020, 12:02:46 AM  iceconnectionstatechange (legacy)
connected
1/25/2020, 12:02:46 AM  connectionstatechange
connected
1/25/2020, 12:02:46 AM  iceconnectionstatechange (legacy)
completed

对等代码

"use strict";

import { isAssetLoadingComplete } from '/game/assetManager.js';
import { playerInputHandler } from '/game/game.js';

const rtcPeerConnectionConfiguration = {
    // Server for negotiating traversing NATs when establishing peer-to-peer communication sessions
    iceServers: [{
        urls: [
            'stun:stun.l.google.com:19302'
        ]
    }]
};

let rtcPeerConn;
// For UDP semantics, set maxRetransmits to 0 and ordered to false
const dataChannelOptions = {
    // TODO: Set this to a unique number returned from joinRoomResponse
    //id: 1,
    // json for JSON and raw for binary
    protocol: "json",
    // If true both peers can call createDataChannel as long as they use the same ID
    negotiated: false,
    // TODO: Set to false so the messages are faster and less reliable
    ordered: true,
    // If maxRetransmits and maxPacketLifeTime aren't set then reliable mode will be on
    // TODO: Send multiple frames of player input every frame to avoid late/missing frames
    //maxRetransmits: 0,
    // The maximum number of milliseconds that attempts to transfer a message may take in unreliable mode.
    //maxPacketLifeTime: 30000
};

let dataChannel;

export let isConnectedToPeers = false;

export function createDataChannel(roomName, socket) {
    rtcPeerConn = new RTCPeerConnection(rtcPeerConnectionConfiguration);
    // Send any ice candidates to the other peer
    rtcPeerConn.onicecandidate = onIceCandidate(socket);
    // Let the 'negotiationneeded' event trigger offer generation
    rtcPeerConn.onnegotiationneeded = function () {
        console.log("Creating an offer")
        rtcPeerConn.createOffer(sendLocalDesc(socket), logError('createOffer'));
    };
    console.log("Creating a data channel");
    dataChannel = rtcPeerConn.createDataChannel(roomName, dataChannelOptions);
    dataChannel.onopen = dataChannelStateOpen;
    dataChannel.onmessage = receiveDataChannelMessage;
    dataChannel.onerror = logError('createAnswer');
    dataChannel.onclose = function(TODO) {
        console.log(`Data channel closed for scoket: ${socket}`, TODO)
    };
}

export function joinDataChannel(socket) {
    console.log("Joining a data channel");
    rtcPeerConn = new RTCPeerConnection(rtcPeerConnectionConfiguration);
    rtcPeerConn.ondatachannel = receiveDataChannel;
    // Send any ice candidates to the other peer
    rtcPeerConn.onicecandidate = onIceCandidate(socket);
}

function receiveDataChannel(rtcDataChannelEvent) {
    console.log("Receiving a data channel", rtcDataChannelEvent);
    dataChannel = rtcDataChannelEvent.channel;
    dataChannel.onopen = dataChannelStateOpen;
    dataChannel.onmessage = receiveDataChannelMessage;
    dataChannel.onerror = logError('createAnswer');
    dataChannel.onclose = function(TODO) {
        console.log(`Data channel closed for scoket: ${socket}`, TODO)
    };
}

function onIceCandidate(socket) {
    return function (event) {
        if (event.candidate) {
            console.log("Sending ice candidates to peer.");
            socket.emit('signalRequest', {
                signal: event.candidate
            });
        }
    }
}

function dataChannelStateOpen(event) {
    console.log("Data channel opened", event);
    isConnectedToPeers = true;

    if(!isAssetLoadingComplete) {
        document.getElementById("startGameButton").textContent = "Loading...";
    }
    else {
        document.getElementById('startGameButton').removeAttribute('disabled');
        document.getElementById("startGameButton").textContent = "Start Game";
    }
}

function receiveDataChannelMessage(messageEvent) {
    switch(dataChannel.protocol) {
        case "json":
            const data = JSON.parse(messageEvent.data)
            playerInputHandler(data);
            break;
        case "raw":
            break;
      }
}

export function signalHandler(socket) {
    return function (signal) {
        if (signal.sdp) {
            console.log("Setting remote description", signal);
            rtcPeerConn.setRemoteDescription(
                signal,
                function () {
                    // If we received an offer, we need to answer
                    if (rtcPeerConn.remoteDescription.type === 'offer') {
                        console.log("Offer received, sending answer")
                        rtcPeerConn.createAnswer(sendLocalDesc(socket), logError('createAnswer'));
                    }
                },
                logError('setRemoteDescription'));
        }
        else if (signal.candidate){
            console.log("Adding ice candidate ", signal)
            rtcPeerConn.addIceCandidate(new RTCIceCandidate(signal));
        }
    }
}

function sendLocalDesc(socket) {
    return function(description) {
        rtcPeerConn.setLocalDescription(
            description,
            function () {
                console.log("Setting local description", description);
                socket.emit('signalRequest', {
                    playerNumber: socket.id,
                    signal: description
                });
            },
            logError('setLocalDescription'));
    };
}

export function sendPlayerInput(playerInput){
    dataChannel.send(JSON.stringify(playerInput));
}

function logError(caller) {
    return function(error) {
        console.log('[' + caller + '] [' + error.name + '] ' + error.message);
    }
}