Examples with NetworkAgentInfo com.android.server.connectivity.NetworkAgentInfo used on opensource projects

Example 81 with NetworkAgentInfo

use of com.android.server.connectivity.NetworkAgentInfo in project platform_frameworks_base by android.

the class ConnectivityService method rematchNetworkAndRequests.

// Handles a network appearing or improving its score.
//
// - Evaluates all current NetworkRequests that can be
//   satisfied by newNetwork, and reassigns to newNetwork
//   any such requests for which newNetwork is the best.
//
// - Lingers any validated Networks that as a result are no longer
//   needed. A network is needed if it is the best network for
//   one or more NetworkRequests, or if it is a VPN.
//
// - Tears down newNetwork if it just became validated
//   but turns out to be unneeded.
//
// - If reapUnvalidatedNetworks==REAP, tears down unvalidated
//   networks that have no chance (i.e. even if validated)
//   of becoming the highest scoring network.
//
// NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy,
// it does not remove NetworkRequests that other Networks could better satisfy.
// If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}.
// This function should be used when possible instead of {@code rematchAllNetworksAndRequests}
// as it performs better by a factor of the number of Networks.
//
// @param newNetwork is the network to be matched against NetworkRequests.
// @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be
//               performed to tear down unvalidated networks that have no chance (i.e. even if
//               validated) of becoming the highest scoring network.
private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, ReapUnvalidatedNetworks reapUnvalidatedNetworks, long now) {
    if (!newNetwork.everConnected)
        return;
    boolean keep = newNetwork.isVPN();
    boolean isNewDefault = false;
    NetworkAgentInfo oldDefaultNetwork = null;
    final boolean wasBackgroundNetwork = newNetwork.isBackgroundNetwork();
    final int score = newNetwork.getCurrentScore();
    if (VDBG)
        log("rematching " + newNetwork.name());
    // Find and migrate to this Network any NetworkRequests for
    // which this network is now the best.
    ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>();
    ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>();
    NetworkCapabilities nc = newNetwork.networkCapabilities;
    if (VDBG)
        log(" network has: " + nc);
    for (NetworkRequestInfo nri : mNetworkRequests.values()) {
        // requests or not, and doesn't affect the network's score.
        if (nri.request.isListen())
            continue;
        final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId);
        final boolean satisfies = newNetwork.satisfies(nri.request);
        if (newNetwork == currentNetwork && satisfies) {
            if (VDBG) {
                log("Network " + newNetwork.name() + " was already satisfying" + " request " + nri.request.requestId + ". No change.");
            }
            keep = true;
            continue;
        }
        // check if it satisfies the NetworkCapabilities
        if (VDBG)
            log("  checking if request is satisfied: " + nri.request);
        if (satisfies) {
            // this request
            if (VDBG) {
                log("currentScore = " + (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + ", newScore = " + score);
            }
            if (currentNetwork == null || currentNetwork.getCurrentScore() < score) {
                if (VDBG)
                    log("rematch for " + newNetwork.name());
                if (currentNetwork != null) {
                    if (VDBG)
                        log("   accepting network in place of " + currentNetwork.name());
                    currentNetwork.removeRequest(nri.request.requestId);
                    currentNetwork.lingerRequest(nri.request, now, mLingerDelayMs);
                    affectedNetworks.add(currentNetwork);
                } else {
                    if (VDBG)
                        log("   accepting network in place of null");
                }
                newNetwork.unlingerRequest(nri.request);
                mNetworkForRequestId.put(nri.request.requestId, newNetwork);
                if (!newNetwork.addRequest(nri.request)) {
                    Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request);
                }
                addedRequests.add(nri);
                keep = true;
                // Tell NetworkFactories about the new score, so they can stop
                // trying to connect if they know they cannot match it.
                // TODO - this could get expensive if we have alot of requests for this
                // network.  Think about if there is a way to reduce this.  Push
                // netid->request mapping to each factory?
                sendUpdatedScoreToFactories(nri.request, score);
                if (isDefaultRequest(nri)) {
                    isNewDefault = true;
                    oldDefaultNetwork = currentNetwork;
                    if (currentNetwork != null) {
                        mLingerMonitor.noteLingerDefaultNetwork(currentNetwork, newNetwork);
                    }
                }
            }
        } else if (newNetwork.isSatisfyingRequest(nri.request.requestId)) {
            // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork".
            if (DBG) {
                log("Network " + newNetwork.name() + " stopped satisfying" + " request " + nri.request.requestId);
            }
            newNetwork.removeRequest(nri.request.requestId);
            if (currentNetwork == newNetwork) {
                mNetworkForRequestId.remove(nri.request.requestId);
                sendUpdatedScoreToFactories(nri.request, 0);
            } else {
                Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + newNetwork.name() + " without updating mNetworkForRequestId or factories!");
            }
            // TODO: Technically, sending CALLBACK_LOST here is
            // incorrect if there is a replacement network currently
            // connected that can satisfy nri, which is a request
            // (not a listen). However, the only capability that can both
            // a) be requested and b) change is NET_CAPABILITY_TRUSTED,
            // so this code is only incorrect for a network that loses
            // the TRUSTED capability, which is a rare case.
            callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST, 0);
        }
    }
    if (isNewDefault) {
        // Notify system services that this network is up.
        makeDefault(newNetwork);
        // Log 0 -> X and Y -> X default network transitions, where X is the new default.
        logDefaultNetworkEvent(newNetwork, oldDefaultNetwork);
        synchronized (ConnectivityService.this) {
            // to reconnect over the new network
            if (mNetTransitionWakeLock.isHeld()) {
                mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_CLEAR_NET_TRANSITION_WAKELOCK, mNetTransitionWakeLockSerialNumber, 0), 1000);
            }
        }
    }
    if (!newNetwork.networkCapabilities.equalRequestableCapabilities(nc)) {
        Slog.wtf(TAG, String.format("BUG: %s changed requestable capabilities during rematch: %s -> %s", nc, newNetwork.networkCapabilities));
    }
    if (newNetwork.getCurrentScore() != score) {
        Slog.wtf(TAG, String.format("BUG: %s changed score during rematch: %d -> %d", score, newNetwork.getCurrentScore()));
    }
    // Second pass: process all listens.
    if (wasBackgroundNetwork != newNetwork.isBackgroundNetwork()) {
        // If the network went from background to foreground or vice versa, we need to update
        // its foreground state. It is safe to do this after rematching the requests because
        // NET_CAPABILITY_FOREGROUND does not affect requests, as is not a requestable
        // capability and does not affect the network's score (see the Slog.wtf call above).
        updateCapabilities(score, newNetwork, newNetwork.networkCapabilities);
    } else {
        processListenRequests(newNetwork, false);
    }
    // before LegacyTypeTracker sends legacy broadcasts
    for (NetworkRequestInfo nri : addedRequests) notifyNetworkAvailable(newNetwork, nri);
    // available callback for newNetwork.
    for (NetworkAgentInfo nai : affectedNetworks) {
        updateLingerState(nai, now);
    }
    // Possibly unlinger newNetwork. Unlingering a network does not send any callbacks so it
    // does not need to be done in any particular order.
    updateLingerState(newNetwork, now);
    if (isNewDefault) {
        // the new one connected.
        if (oldDefaultNetwork != null) {
            mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), oldDefaultNetwork, true);
        }
        mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0;
        mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork);
        notifyLockdownVpn(newNetwork);
    }
    if (keep) {
        // TODO: Avoid redoing this; this must only be done once when a network comes online.
        try {
            final IBatteryStats bs = BatteryStatsService.getService();
            final int type = newNetwork.networkInfo.getType();
            final String baseIface = newNetwork.linkProperties.getInterfaceName();
            bs.noteNetworkInterfaceType(baseIface, type);
            for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) {
                final String stackedIface = stacked.getInterfaceName();
                bs.noteNetworkInterfaceType(stackedIface, type);
                NetworkStatsFactory.noteStackedIface(stackedIface, baseIface);
            }
        } catch (RemoteException ignored) {
        }
        // This is on top of the multiple intent sequencing referenced in the todo above.
        for (int i = 0; i < newNetwork.numNetworkRequests(); i++) {
            NetworkRequest nr = newNetwork.requestAt(i);
            if (nr.legacyType != TYPE_NONE && nr.isRequest()) {
                // legacy type tracker filters out repeat adds
                mLegacyTypeTracker.add(nr.legacyType, newNetwork);
            }
        }
        // newNetwork to the tracker explicitly (it's a no-op if it has already been added).
        if (newNetwork.isVPN()) {
            mLegacyTypeTracker.add(TYPE_VPN, newNetwork);
        }
    }
    if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) {
        for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) {
            if (unneeded(nai, UnneededFor.TEARDOWN)) {
                if (nai.getLingerExpiry() > 0) {
                    // This network has active linger timers and no requests, but is not
                    // lingering. Linger it.
                    //
                    // One way (the only way?) this can happen if this network is unvalidated
                    // and became unneeded due to another network improving its score to the
                    // point where this network will no longer be able to satisfy any requests
                    // even if it validates.
                    updateLingerState(nai, now);
                } else {
                    if (DBG)
                        log("Reaping " + nai.name());
                    teardownUnneededNetwork(nai);
                }
            }
        }
    }
}

Example 82 with NetworkAgentInfo

use of com.android.server.connectivity.NetworkAgentInfo in project platform_frameworks_base by android.

the class ConnectivityService method rematchAllNetworksAndRequests.

/**
     * Attempt to rematch all Networks with NetworkRequests.  This may result in Networks
     * being disconnected.
     * @param changed If only one Network's score or capabilities have been modified since the last
     *         time this function was called, pass this Network in this argument, otherwise pass
     *         null.
     * @param oldScore If only one Network has been changed but its NetworkCapabilities have not
     *         changed, pass in the Network's score (from getCurrentScore()) prior to the change via
     *         this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if
     *         {@code changed} is {@code null}. This is because NetworkCapabilities influence a
     *         network's score.
     */
private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) {
    // TODO: This may get slow.  The "changed" parameter is provided for future optimization
    // to avoid the slowness.  It is not simply enough to process just "changed", for
    // example in the case where "changed"'s score decreases and another network should begin
    // satifying a NetworkRequest that "changed" currently satisfies.
    // Optimization: Only reprocess "changed" if its score improved.  This is safe because it
    // can only add more NetworkRequests satisfied by "changed", and this is exactly what
    // rematchNetworkAndRequests() handles.
    final long now = SystemClock.elapsedRealtime();
    if (changed != null && oldScore < changed.getCurrentScore()) {
        rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP, now);
    } else {
        final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray(new NetworkAgentInfo[mNetworkAgentInfos.size()]);
        // Rematch higher scoring networks first to prevent requests first matching a lower
        // scoring network and then a higher scoring network, which could produce multiple
        // callbacks and inadvertently unlinger networks.
        Arrays.sort(nais);
        for (NetworkAgentInfo nai : nais) {
            rematchNetworkAndRequests(nai, // rematched.
            (nai != nais[nais.length - 1]) ? ReapUnvalidatedNetworks.DONT_REAP : ReapUnvalidatedNetworks.REAP, now);
        }
    }
}

Example 83 with NetworkAgentInfo

use of com.android.server.connectivity.NetworkAgentInfo in project platform_frameworks_base by android.

the class ConnectivityService method registerNetworkAgent.

public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, LinkProperties linkProperties, NetworkCapabilities networkCapabilities, int currentScore, NetworkMisc networkMisc) {
    enforceConnectivityInternalPermission();
    // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network
    // satisfies mDefaultRequest.
    final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties(linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this);
    synchronized (this) {
        nai.networkMonitor.systemReady = mSystemReady;
    }
    addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network, networkInfo.getExtraInfo());
    if (DBG)
        log("registerNetworkAgent " + nai);
    mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai));
    return nai.network.netId;
}

Example 84 with NetworkAgentInfo

use of com.android.server.connectivity.NetworkAgentInfo in project platform_frameworks_base by android.

the class ConnectivityService method requestBandwidthUpdate.

@Override
public boolean requestBandwidthUpdate(Network network) {
    enforceAccessPermission();
    NetworkAgentInfo nai = null;
    if (network == null) {
        return false;
    }
    synchronized (mNetworkForNetId) {
        nai = mNetworkForNetId.get(network.netId);
    }
    if (nai != null) {
        nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE);
        return true;
    }
    return false;
}

Example 85 with NetworkAgentInfo

use of com.android.server.connectivity.NetworkAgentInfo in project platform_frameworks_base by android.

the class ConnectivityService method dumpNetworkDiagnostics.

private void dumpNetworkDiagnostics(IndentingPrintWriter pw) {
    final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>();
    final long DIAG_TIME_MS = 5000;
    for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) {
        // Start gathering diagnostic information.
        netDiags.add(new NetworkDiagnostics(nai.network, // Must be a copy.
        new LinkProperties(nai.linkProperties), DIAG_TIME_MS));
    }
    for (NetworkDiagnostics netDiag : netDiags) {
        pw.println();
        netDiag.waitForMeasurements();
        netDiag.dump(pw);
    }
}