rk3399 android以太网和wifi共存-Toy模板网

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Android 9

1.修改 frameworks/base/core/java/android/net/NetworkFactory.java

evalRequest 方法注释两行

private void evalRequest(NetworkRequestInfo n) {
        if (VDBG) log("evalRequest");
        if (n.requested == false && n.score < mScore &&
                n.request.networkCapabilities.satisfiedByNetworkCapabilities(
                mCapabilityFilter) && acceptRequest(n.request, n.score)) {
            if (VDBG) log("  needNetworkFor");
            needNetworkFor(n.request, n.score);
            n.requested = true;
            Log.d(TAG, "needNetworkFor");
        } else if (n.requested == true &&
                (n.score > mScore || n.request.networkCapabilities.satisfiedByNetworkCapabilities(
                mCapabilityFilter) == false || acceptRequest(n.request, n.score) == false)) {
            if (VDBG) log("  releaseNetworkFor");
            Log.d(TAG, "releaseNetworkFor");
            //releaseNetworkFor(n.request);//注释
            //n.requested = false;//注释
        } else {
            if (VDBG) log("  done");
        }
    }

2.修改frameworks/opt/net/ethernet/java/com/android/server/ethernet/EthernetNetworkFactory.java文件修改 NETWORK_SCORE=30 降低优先级

这样以太网和wifi都能连接成功

Android 12

frameworks\opt\net\ethernet\java\com\android\server\ethernet\EthernetNetworkFactory.java

需要修改下面的得分

private static final SparseArray<TransportInfo> sTransports = new SparseArray();
        static {
            // LowpanInterfaceTracker.NETWORK_SCORE
            sTransports.put(NetworkCapabilities.TRANSPORT_LOWPAN,
                    new TransportInfo(ConnectivityManager.TYPE_NONE, 30));
            // WifiAwareDataPathStateManager.NETWORK_FACTORY_SCORE_AVAIL
            sTransports.put(NetworkCapabilities.TRANSPORT_WIFI_AWARE,
                    new TransportInfo(ConnectivityManager.TYPE_NONE, 1));
            // EthernetNetworkFactory.NETWORK_SCORE
            sTransports.put(NetworkCapabilities.TRANSPORT_ETHERNET,
                    new TransportInfo(ConnectivityManager.TYPE_ETHERNET, 70));
            // BluetoothTetheringNetworkFactory.NETWORK_SCORE
            sTransports.put(NetworkCapabilities.TRANSPORT_BLUETOOTH,
                    new TransportInfo(ConnectivityManager.TYPE_BLUETOOTH, 69));
            // WifiNetworkFactory.SCORE_FILTER / NetworkAgent.WIFI_BASE_SCORE
            sTransports.put(NetworkCapabilities.TRANSPORT_WIFI,
                    new TransportInfo(ConnectivityManager.TYPE_WIFI, 60));
            // TelephonyNetworkFactory.TELEPHONY_NETWORK_SCORE
            sTransports.put(NetworkCapabilities.TRANSPORT_CELLULAR,
                    new TransportInfo(ConnectivityManager.TYPE_MOBILE, 50));
        }

frameworks\libs\net\common\device\android\net\NetworkFactoryLegacyImpl.java

原因是updateAgent变了

Android 9

private void updateAgent() {
            if (mNetworkAgent == null) return;
            if (DBG) {
                Log.i(TAG, "Updating mNetworkAgent with: " +
                        mCapabilities + ", " +
                        mNetworkInfo + ", " +
                        mLinkProperties);
            }
            mNetworkAgent.sendNetworkCapabilities(mCapabilities);
            mNetworkAgent.sendNetworkInfo(mNetworkInfo);
            mNetworkAgent.sendLinkProperties(mLinkProperties);
            // never set the network score below 0.
            mNetworkAgent.sendNetworkScore(mLinkUp? NETWORK_SCORE : 0);
        }

Android12

private void updateAgent() {
            if (mNetworkAgent == null) return;
            if (DBG) {
                Log.i(TAG, "Updating mNetworkAgent with: " +
                        mCapabilities + ", " +
                        mLinkProperties);
            }
            mNetworkAgent.sendNetworkCapabilities(mCapabilities);
            mNetworkAgent.sendLinkProperties(mLinkProperties);

            // As a note, getNetworkScore() is fairly expensive to calculate. This is fine for now
            // since the agent isn't updated frequently. Consider caching the score in the future if
            // agent updating is required more often
            mNetworkAgent.sendNetworkScore(getNetworkScore());
        }

/**
         * Determines the network score based on the transport associated with the interface.
         * Ethernet interfaces could propagate a transport types forward. Since we can't
         * get more information about the statuses of the interfaces on the other end of the local
         * interface, we'll best-effort assign the score as the base score of the assigned transport
         * when the link is up. When the link is down, the score is set to zero.
         *
         * This function is called with the purpose of assigning and updating the network score of
         * the member NetworkAgent.
         */
        private int getNetworkScore() {
            // never set the network score below 0.
            if (!mLinkUp) {
                return 0;
            }

            int[] transportTypes = mCapabilities.getTransportTypes();
            if (transportTypes.length < 1) {
                Log.w(TAG, "Network interface '" + mLinkProperties.getInterfaceName() + "' has no "
                        + "transport type associated with it. Score set to zero");
                return 0;
            }
            TransportInfo transportInfo = sTransports.get(transportTypes[0], /* if dne */ null);
            if (transportInfo != null) {
                return transportInfo.mScore;
            }
            return 0;
        }

所谓共存就是让两个网络同时使用，如果想让哪个网络作为外网，则该网络优先级要高于内网的网络，即可达到外网用来上网的需求，那么要想共存，就必须到从低优先级网络切换到优先级高的网络时，不要做断开操作，即可达到，两个网络同时存在的需求，做到以上两点，我们便满足了2个网络同时存在，且使用优先级高的外网上网

到了android12已经废弃了这种直接的打分机制，使用了policy机制，具体可参考
packages/modules/Connectivity/service/src/com/android/server/connectivity/NetworkRanker.java
但由于这种评分机制涉及的条件比较多，对于我们做网络共存这个需求来说更加复杂，
对此android开发者也给我么预留了以前的评分方案，只要我们简单的将
USE_POLICY_RANKING = false; 即可文章来源地址https://www.toymoban.com/news/detail-702574.html

 /**
     * Find the best network satisfying this request among the list of passed networks.
     */
    @Nullable
    public NetworkAgentInfo getBestNetwork(@NonNull final NetworkRequest request,
            @NonNull final Collection<NetworkAgentInfo> nais,
            @Nullable final NetworkAgentInfo currentSatisfier) {
        final ArrayList<NetworkAgentInfo> candidates = filter(nais, nai -> nai.satisfies(request));
        if (candidates.size() == 1) return candidates.get(0); // Only one potential satisfier
        if (candidates.size() <= 0) return null; // No network can satisfy this request
        if (USE_POLICY_RANKING) {
            return getBestNetworkByPolicy(candidates, currentSatisfier);
        } else {
            return getBestNetworkByLegacyInt(candidates);
        }
    }

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