diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java index b71943504b..87b1bdfbe2 100644 --- a/services/core/java/com/android/server/ConnectivityService.java +++ b/services/core/java/com/android/server/ConnectivityService.java @@ -5864,6 +5864,19 @@ public class ConnectivityService extends IConnectivityManager.Stub return INetd.PERMISSION_NONE; } + private void updateNetworkPermissions(@NonNull final NetworkAgentInfo nai, + @NonNull final NetworkCapabilities newNc) { + final int oldPermission = getNetworkPermission(nai.networkCapabilities); + final int newPermission = getNetworkPermission(newNc); + if (oldPermission != newPermission && nai.created && !nai.isVPN()) { + try { + mNMS.setNetworkPermission(nai.network.netId, newPermission); + } catch (RemoteException e) { + loge("Exception in setNetworkPermission: " + e); + } + } + } + /** * Augments the NetworkCapabilities passed in by a NetworkAgent with capabilities that are * maintained here that the NetworkAgent is not aware of (e.g., validated, captive portal, @@ -5935,21 +5948,11 @@ public class ConnectivityService extends IConnectivityManager.Stub * @param nai the network having its capabilities updated. * @param nc the new network capabilities. */ - private void updateCapabilities(int oldScore, NetworkAgentInfo nai, NetworkCapabilities nc) { + private void updateCapabilities(final int oldScore, @NonNull final NetworkAgentInfo nai, + @NonNull final NetworkCapabilities nc) { NetworkCapabilities newNc = mixInCapabilities(nai, nc); - if (Objects.equals(nai.networkCapabilities, newNc)) return; - - final int oldPermission = getNetworkPermission(nai.networkCapabilities); - final int newPermission = getNetworkPermission(newNc); - if (oldPermission != newPermission && nai.created && !nai.isVPN()) { - try { - mNMS.setNetworkPermission(nai.network.netId, newPermission); - } catch (RemoteException e) { - loge("Exception in setNetworkPermission: " + e); - } - } - + updateNetworkPermissions(nai, nc); final NetworkCapabilities prevNc = nai.getAndSetNetworkCapabilities(newNc); updateUids(nai, prevNc, newNc); @@ -6296,6 +6299,52 @@ public class ConnectivityService extends IConnectivityManager.Stub } } + // An accumulator class to gather the list of changes that result from a rematch. + // TODO : enrich to represent an entire set of changes to apply. + private static class NetworkReassignment { + static class NetworkBgStatePair { + @NonNull final NetworkAgentInfo mNetwork; + final boolean mOldBackground; + NetworkBgStatePair(@NonNull final NetworkAgentInfo network, + final boolean oldBackground) { + mNetwork = network; + mOldBackground = oldBackground; + } + } + + static class RequestReassignment { + @NonNull public final NetworkRequestInfo mRequest; + @Nullable public final NetworkAgentInfo mOldNetwork; + @Nullable public final NetworkAgentInfo mNewNetwork; + RequestReassignment(@NonNull final NetworkRequestInfo request, + @Nullable final NetworkAgentInfo oldNetwork, + @Nullable final NetworkAgentInfo newNetwork) { + mRequest = request; + mOldNetwork = oldNetwork; + mNewNetwork = newNetwork; + } + } + + @NonNull private final Set mRematchedNetworks = new ArraySet<>(); + @NonNull private final List mReassignments = new ArrayList<>(); + + @NonNull Iterable getRematchedNetworks() { + return mRematchedNetworks; + } + + @NonNull Iterable getRequestReassignments() { + return mReassignments; + } + + void addRequestReassignment(@NonNull final RequestReassignment reassignment) { + mReassignments.add(reassignment); + } + + void addRematchedNetwork(@NonNull final NetworkBgStatePair network) { + mRematchedNetworks.add(network); + } + } + private ArrayMap computeRequestReassignmentForNetwork( @NonNull final NetworkAgentInfo newNetwork) { final int score = newNetwork.getCurrentScore(); @@ -6341,8 +6390,8 @@ public class ConnectivityService extends IConnectivityManager.Stub // 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. + // - Writes into the passed reassignment object all changes that should be done for + // rematching this network with all requests, to be applied later. // // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, // it does not remove NetworkRequests that other Networks could better satisfy. @@ -6350,29 +6399,29 @@ public class ConnectivityService extends IConnectivityManager.Stub // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} // as it performs better by a factor of the number of Networks. // + // TODO : stop writing to the passed reassignment. This is temporarily more useful, but + // it's unidiomatic Java and it's hard to read. + // + // @param changes a currently-building list of changes to write to // @param newNetwork is the network to be matched against NetworkRequests. // @param now the time the rematch starts, as returned by SystemClock.elapsedRealtime(); - private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, long now) { + private void rematchNetworkAndRequests(@NonNull final NetworkReassignment changes, + @NonNull final NetworkAgentInfo newNetwork, final long now) { ensureRunningOnConnectivityServiceThread(); if (!newNetwork.everConnected) return; boolean isNewDefault = false; NetworkAgentInfo oldDefaultNetwork = null; - final boolean wasBackgroundNetwork = newNetwork.isBackgroundNetwork(); - final int score = newNetwork.getCurrentScore(); + changes.addRematchedNetwork(new NetworkReassignment.NetworkBgStatePair(newNetwork, + newNetwork.isBackgroundNetwork())); if (VDBG || DDBG) log("rematching " + newNetwork.name()); final ArrayMap reassignedRequests = computeRequestReassignmentForNetwork(newNetwork); - NetworkCapabilities nc = newNetwork.networkCapabilities; - if (VDBG) log(" network has: " + nc); - // Find and migrate to this Network any NetworkRequests for // which this network is now the best. - final ArrayList removedRequests = new ArrayList<>(); - final ArrayList addedRequests = new ArrayList<>(); for (final Map.Entry entry : reassignedRequests.entrySet()) { final NetworkRequestInfo nri = entry.getKey(); @@ -6386,7 +6435,6 @@ public class ConnectivityService extends IConnectivityManager.Stub } previousSatisfier.removeRequest(nri.request.requestId); previousSatisfier.lingerRequest(nri.request, now, mLingerDelayMs); - removedRequests.add(previousSatisfier); } else { if (VDBG || DDBG) log(" accepting network in place of null"); } @@ -6395,7 +6443,8 @@ public class ConnectivityService extends IConnectivityManager.Stub if (!newSatisfier.addRequest(nri.request)) { Slog.wtf(TAG, "BUG: " + newSatisfier.name() + " already has " + nri.request); } - addedRequests.add(nri); + changes.addRequestReassignment(new NetworkReassignment.RequestReassignment( + nri, previousSatisfier, newSatisfier)); // 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 a lot of requests for this @@ -6452,48 +6501,6 @@ public class ConnectivityService extends IConnectivityManager.Stub // Have a new default network, release the transition wakelock in scheduleReleaseNetworkTransitionWakelock(); } - - if (!newNetwork.networkCapabilities.equalRequestableCapabilities(nc)) { - Slog.wtf(TAG, String.format( - "BUG: %s changed requestable capabilities during rematch: %s -> %s", - newNetwork.name(), nc, newNetwork.networkCapabilities)); - } - if (newNetwork.getCurrentScore() != score) { - Slog.wtf(TAG, String.format( - "BUG: %s changed score during rematch: %d -> %d", - newNetwork.name(), score, newNetwork.getCurrentScore())); - } - - // Notify requested networks are available after the default net is switched, but - // before LegacyTypeTracker sends legacy broadcasts - for (NetworkRequestInfo nri : addedRequests) notifyNetworkAvailable(newNetwork, nri); - - // Finally, process listen requests and update capabilities if the background state has - // changed for this network. For consistency with previous behavior, send onLost callbacks - // before onAvailable. - processNewlyLostListenRequests(newNetwork); - - // Maybe the network changed background states. Update its capabilities. - final boolean backgroundChanged = wasBackgroundNetwork != newNetwork.isBackgroundNetwork(); - if (backgroundChanged) { - final NetworkCapabilities newNc = mixInCapabilities(newNetwork, - newNetwork.networkCapabilities); - - final int oldPermission = getNetworkPermission(newNetwork.networkCapabilities); - final int newPermission = getNetworkPermission(newNc); - if (oldPermission != newPermission) { - try { - mNMS.setNetworkPermission(newNetwork.network.netId, newPermission); - } catch (RemoteException e) { - loge("Exception in setNetworkPermission: " + e); - } - } - - newNetwork.getAndSetNetworkCapabilities(newNc); - notifyNetworkCallbacks(newNetwork, ConnectivityManager.CALLBACK_CAP_CHANGED); - } - - processNewlySatisfiedListenRequests(newNetwork); } /** @@ -6515,12 +6522,33 @@ public class ConnectivityService extends IConnectivityManager.Stub // scoring network and then a higher scoring network, which could produce multiple // callbacks. Arrays.sort(nais); + final NetworkReassignment changes = new NetworkReassignment(); for (final NetworkAgentInfo nai : nais) { - rematchNetworkAndRequests(nai, now); + rematchNetworkAndRequests(changes, nai, now); } final NetworkAgentInfo newDefaultNetwork = getDefaultNetwork(); + // Notify requested networks are available after the default net is switched, but + // before LegacyTypeTracker sends legacy broadcasts + for (final NetworkReassignment.RequestReassignment event : + changes.getRequestReassignments()) { + if (null != event.mNewNetwork) { + notifyNetworkAvailable(event.mNewNetwork, event.mRequest); + } + } + + for (final NetworkReassignment.NetworkBgStatePair event : changes.getRematchedNetworks()) { + // Process listen requests and update capabilities if the background state has + // changed for this network. For consistency with previous behavior, send onLost + // callbacks before onAvailable. + processNewlyLostListenRequests(event.mNetwork); + if (event.mOldBackground != event.mNetwork.isBackgroundNetwork()) { + applyBackgroundChangeForRematch(event.mNetwork); + } + processNewlySatisfiedListenRequests(event.mNetwork); + } + for (final NetworkAgentInfo nai : nais) { // Rematching may have altered the linger state of some networks, so update all linger // timers. updateLingerState reads the state from the network agent and does nothing @@ -6552,6 +6580,24 @@ public class ConnectivityService extends IConnectivityManager.Stub } } + /** + * Apply a change in background state resulting from rematching networks with requests. + * + * During rematch, a network may change background states by starting to satisfy or stopping + * to satisfy a foreground request. Listens don't count for this. When a network changes + * background states, its capabilities need to be updated and callbacks fired for the + * capability change. + * + * @param nai The network that changed background states + */ + private void applyBackgroundChangeForRematch(@NonNull final NetworkAgentInfo nai) { + final NetworkCapabilities newNc = mixInCapabilities(nai, nai.networkCapabilities); + if (Objects.equals(nai.networkCapabilities, newNc)) return; + updateNetworkPermissions(nai, newNc); + nai.getAndSetNetworkCapabilities(newNc); + notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); + } + private void updateLegacyTypeTrackerAndVpnLockdownForRematch( @Nullable final NetworkAgentInfo oldDefaultNetwork, @Nullable final NetworkAgentInfo newDefaultNetwork,