/* * Copyright (C) 2007 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.server; import static android.Manifest.permission.ACCESS_NETWORK_STATE; import static android.Manifest.permission.CHANGE_NETWORK_STATE; import static android.Manifest.permission.DUMP; import static android.Manifest.permission.MANAGE_NETWORK_POLICY; import static android.net.NetworkStats.SET_DEFAULT; import static android.net.NetworkStats.TAG_NONE; import static android.net.NetworkStats.UID_ALL; import static android.net.TrafficStats.UID_TETHERING; import static android.provider.Settings.Secure.NETSTATS_ENABLED; import static com.android.server.NetworkManagementSocketTagger.PROP_QTAGUID_ENABLED; import android.content.Context; import android.content.pm.PackageManager; import android.net.INetworkManagementEventObserver; import android.net.InterfaceConfiguration; import android.net.LinkAddress; import android.net.NetworkStats; import android.net.NetworkUtils; import android.net.RouteInfo; import android.net.wifi.WifiConfiguration; import android.net.wifi.WifiConfiguration.KeyMgmt; import android.os.Binder; import android.os.INetworkManagementService; import android.os.SystemClock; import android.os.SystemProperties; import android.provider.Settings; import android.util.Log; import android.util.Slog; import android.util.SparseBooleanArray; import com.android.internal.net.NetworkStatsFactory; import com.google.android.collect.Sets; import java.io.BufferedReader; import java.io.DataInputStream; import java.io.File; import java.io.FileDescriptor; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.Inet4Address; import java.net.InetAddress; import java.net.InterfaceAddress; import java.net.NetworkInterface; import java.net.SocketException; import java.util.ArrayList; import java.util.Collection; import java.util.HashSet; import java.util.NoSuchElementException; import java.util.StringTokenizer; import java.util.concurrent.CountDownLatch; /** * @hide */ public class NetworkManagementService extends INetworkManagementService.Stub implements Watchdog.Monitor { private static final String TAG = "NetworkManagementService"; private static final boolean DBG = false; private static final String NETD_TAG = "NetdConnector"; private static final int ADD = 1; private static final int REMOVE = 2; private static final String DEFAULT = "default"; private static final String SECONDARY = "secondary"; /** * Name representing {@link #setGlobalAlert(long)} limit when delivered to * {@link INetworkManagementEventObserver#limitReached(String, String)}. */ public static final String LIMIT_GLOBAL_ALERT = "globalAlert"; class NetdResponseCode { /* Keep in sync with system/netd/ResponseCode.h */ public static final int InterfaceListResult = 110; public static final int TetherInterfaceListResult = 111; public static final int TetherDnsFwdTgtListResult = 112; public static final int TtyListResult = 113; public static final int TetherStatusResult = 210; public static final int IpFwdStatusResult = 211; public static final int InterfaceGetCfgResult = 213; public static final int SoftapStatusResult = 214; public static final int InterfaceRxCounterResult = 216; public static final int InterfaceTxCounterResult = 217; public static final int InterfaceRxThrottleResult = 218; public static final int InterfaceTxThrottleResult = 219; public static final int QuotaCounterResult = 220; public static final int TetheringStatsResult = 221; public static final int InterfaceChange = 600; public static final int BandwidthControl = 601; } /** * Binder context for this service */ private Context mContext; /** * connector object for communicating with netd */ private NativeDaemonConnector mConnector; private Thread mThread; private final CountDownLatch mConnectedSignal = new CountDownLatch(1); // TODO: replace with RemoteCallbackList private ArrayList mObservers; private final NetworkStatsFactory mStatsFactory = new NetworkStatsFactory(); private Object mQuotaLock = new Object(); /** Set of interfaces with active quotas. */ private HashSet mActiveQuotaIfaces = Sets.newHashSet(); /** Set of interfaces with active alerts. */ private HashSet mActiveAlertIfaces = Sets.newHashSet(); /** Set of UIDs with active reject rules. */ private SparseBooleanArray mUidRejectOnQuota = new SparseBooleanArray(); private volatile boolean mBandwidthControlEnabled; /** * Constructs a new NetworkManagementService instance * * @param context Binder context for this service */ private NetworkManagementService(Context context) { mContext = context; mObservers = new ArrayList(); if ("simulator".equals(SystemProperties.get("ro.product.device"))) { return; } mConnector = new NativeDaemonConnector( new NetdCallbackReceiver(), "netd", 10, NETD_TAG); mThread = new Thread(mConnector, NETD_TAG); // Add ourself to the Watchdog monitors. Watchdog.getInstance().addMonitor(this); } public static NetworkManagementService create(Context context) throws InterruptedException { NetworkManagementService service = new NetworkManagementService(context); if (DBG) Slog.d(TAG, "Creating NetworkManagementService"); service.mThread.start(); if (DBG) Slog.d(TAG, "Awaiting socket connection"); service.mConnectedSignal.await(); if (DBG) Slog.d(TAG, "Connected"); return service; } public void systemReady() { // only enable bandwidth control when support exists, and requested by // system setting. final boolean hasKernelSupport = new File("/proc/net/xt_qtaguid/ctrl").exists(); final boolean shouldEnable = Settings.Secure.getInt(mContext.getContentResolver(), NETSTATS_ENABLED, 1) != 0; if (hasKernelSupport && shouldEnable) { Slog.d(TAG, "enabling bandwidth control"); try { mConnector.doCommand("bandwidth enable"); mBandwidthControlEnabled = true; } catch (NativeDaemonConnectorException e) { Log.wtf(TAG, "problem enabling bandwidth controls", e); } } else { Slog.d(TAG, "not enabling bandwidth control"); } SystemProperties.set(PROP_QTAGUID_ENABLED, mBandwidthControlEnabled ? "1" : "0"); } public void registerObserver(INetworkManagementEventObserver obs) { Slog.d(TAG, "Registering observer"); mObservers.add(obs); } public void unregisterObserver(INetworkManagementEventObserver obs) { Slog.d(TAG, "Unregistering observer"); mObservers.remove(mObservers.indexOf(obs)); } /** * Notify our observers of an interface status change */ private void notifyInterfaceStatusChanged(String iface, boolean up) { for (INetworkManagementEventObserver obs : mObservers) { try { obs.interfaceStatusChanged(iface, up); } catch (Exception ex) { Slog.w(TAG, "Observer notifier failed", ex); } } } /** * Notify our observers of an interface link state change * (typically, an Ethernet cable has been plugged-in or unplugged). */ private void notifyInterfaceLinkStateChanged(String iface, boolean up) { for (INetworkManagementEventObserver obs : mObservers) { try { obs.interfaceLinkStateChanged(iface, up); } catch (Exception ex) { Slog.w(TAG, "Observer notifier failed", ex); } } } /** * Notify our observers of an interface addition. */ private void notifyInterfaceAdded(String iface) { for (INetworkManagementEventObserver obs : mObservers) { try { obs.interfaceAdded(iface); } catch (Exception ex) { Slog.w(TAG, "Observer notifier failed", ex); } } } /** * Notify our observers of an interface removal. */ private void notifyInterfaceRemoved(String iface) { // netd already clears out quota and alerts for removed ifaces; update // our sanity-checking state. mActiveAlertIfaces.remove(iface); mActiveQuotaIfaces.remove(iface); for (INetworkManagementEventObserver obs : mObservers) { try { obs.interfaceRemoved(iface); } catch (Exception ex) { Slog.w(TAG, "Observer notifier failed", ex); } } } /** * Notify our observers of a limit reached. */ private void notifyLimitReached(String limitName, String iface) { for (INetworkManagementEventObserver obs : mObservers) { try { obs.limitReached(limitName, iface); } catch (Exception ex) { Slog.w(TAG, "Observer notifier failed", ex); } } } /** * Let us know the daemon is connected */ protected void onDaemonConnected() { if (DBG) Slog.d(TAG, "onConnected"); mConnectedSignal.countDown(); } // // Netd Callback handling // class NetdCallbackReceiver implements INativeDaemonConnectorCallbacks { /** {@inheritDoc} */ public void onDaemonConnected() { NetworkManagementService.this.onDaemonConnected(); } /** {@inheritDoc} */ public boolean onEvent(int code, String raw, String[] cooked) { switch (code) { case NetdResponseCode.InterfaceChange: /* * a network interface change occured * Format: "NNN Iface added " * "NNN Iface removed " * "NNN Iface changed " * "NNN Iface linkstatus " */ if (cooked.length < 4 || !cooked[1].equals("Iface")) { throw new IllegalStateException( String.format("Invalid event from daemon (%s)", raw)); } if (cooked[2].equals("added")) { notifyInterfaceAdded(cooked[3]); return true; } else if (cooked[2].equals("removed")) { notifyInterfaceRemoved(cooked[3]); return true; } else if (cooked[2].equals("changed") && cooked.length == 5) { notifyInterfaceStatusChanged(cooked[3], cooked[4].equals("up")); return true; } else if (cooked[2].equals("linkstate") && cooked.length == 5) { notifyInterfaceLinkStateChanged(cooked[3], cooked[4].equals("up")); return true; } throw new IllegalStateException( String.format("Invalid event from daemon (%s)", raw)); // break; case NetdResponseCode.BandwidthControl: /* * Bandwidth control needs some attention * Format: "NNN limit alert " */ if (cooked.length < 5 || !cooked[1].equals("limit")) { throw new IllegalStateException( String.format("Invalid event from daemon (%s)", raw)); } if (cooked[2].equals("alert")) { notifyLimitReached(cooked[3], cooked[4]); return true; } throw new IllegalStateException( String.format("Invalid event from daemon (%s)", raw)); // break; default: break; } return false; } } // // INetworkManagementService members // public String[] listInterfaces() throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.ACCESS_NETWORK_STATE, "NetworkManagementService"); try { return mConnector.doListCommand("interface list", NetdResponseCode.InterfaceListResult); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Cannot communicate with native daemon to list interfaces"); } } public InterfaceConfiguration getInterfaceConfig(String iface) throws IllegalStateException { mContext.enforceCallingOrSelfPermission(ACCESS_NETWORK_STATE, TAG); String rsp; try { rsp = mConnector.doCommand("interface getcfg " + iface).get(0); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Cannot communicate with native daemon to get interface config"); } Slog.d(TAG, String.format("rsp <%s>", rsp)); // Rsp: 213 xx:xx:xx:xx:xx:xx yyy.yyy.yyy.yyy zzz [flag1 flag2 flag3] StringTokenizer st = new StringTokenizer(rsp); InterfaceConfiguration cfg; try { try { int code = Integer.parseInt(st.nextToken(" ")); if (code != NetdResponseCode.InterfaceGetCfgResult) { throw new IllegalStateException( String.format("Expected code %d, but got %d", NetdResponseCode.InterfaceGetCfgResult, code)); } } catch (NumberFormatException nfe) { throw new IllegalStateException( String.format("Invalid response from daemon (%s)", rsp)); } cfg = new InterfaceConfiguration(); cfg.hwAddr = st.nextToken(" "); InetAddress addr = null; int prefixLength = 0; try { addr = NetworkUtils.numericToInetAddress(st.nextToken(" ")); } catch (IllegalArgumentException iae) { Slog.e(TAG, "Failed to parse ipaddr", iae); } try { prefixLength = Integer.parseInt(st.nextToken(" ")); } catch (NumberFormatException nfe) { Slog.e(TAG, "Failed to parse prefixLength", nfe); } cfg.addr = new LinkAddress(addr, prefixLength); cfg.interfaceFlags = st.nextToken("]").trim() +"]"; } catch (NoSuchElementException nsee) { throw new IllegalStateException( String.format("Invalid response from daemon (%s)", rsp)); } Slog.d(TAG, String.format("flags <%s>", cfg.interfaceFlags)); return cfg; } public void setInterfaceConfig( String iface, InterfaceConfiguration cfg) throws IllegalStateException { mContext.enforceCallingOrSelfPermission(CHANGE_NETWORK_STATE, TAG); LinkAddress linkAddr = cfg.addr; if (linkAddr == null || linkAddr.getAddress() == null) { throw new IllegalStateException("Null LinkAddress given"); } String cmd = String.format("interface setcfg %s %s %d %s", iface, linkAddr.getAddress().getHostAddress(), linkAddr.getNetworkPrefixLength(), cfg.interfaceFlags); try { mConnector.doCommand(cmd); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate with native daemon to interface setcfg - " + e); } } public void setInterfaceDown(String iface) throws IllegalStateException { mContext.enforceCallingOrSelfPermission(CHANGE_NETWORK_STATE, TAG); try { InterfaceConfiguration ifcg = getInterfaceConfig(iface); ifcg.interfaceFlags = ifcg.interfaceFlags.replace("up", "down"); setInterfaceConfig(iface, ifcg); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate with native daemon for interface down - " + e); } } public void setInterfaceUp(String iface) throws IllegalStateException { mContext.enforceCallingOrSelfPermission(CHANGE_NETWORK_STATE, TAG); try { InterfaceConfiguration ifcg = getInterfaceConfig(iface); ifcg.interfaceFlags = ifcg.interfaceFlags.replace("down", "up"); setInterfaceConfig(iface, ifcg); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate with native daemon for interface up - " + e); } } public void setInterfaceIpv6PrivacyExtensions(String iface, boolean enable) throws IllegalStateException { mContext.enforceCallingOrSelfPermission(CHANGE_NETWORK_STATE, TAG); String cmd = String.format("interface ipv6privacyextensions %s %s", iface, enable ? "enable" : "disable"); try { mConnector.doCommand(cmd); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate with native daemon to set ipv6privacyextensions - " + e); } } /* TODO: This is right now a IPv4 only function. Works for wifi which loses its IPv6 addresses on interface down, but we need to do full clean up here */ public void clearInterfaceAddresses(String iface) throws IllegalStateException { mContext.enforceCallingOrSelfPermission(CHANGE_NETWORK_STATE, TAG); String cmd = String.format("interface clearaddrs %s", iface); try { mConnector.doCommand(cmd); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate with native daemon to interface clearallips - " + e); } } public void enableIpv6(String iface) throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); try { mConnector.doCommand(String.format("interface ipv6 %s enable", iface)); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate to native daemon for enabling ipv6"); } } public void disableIpv6(String iface) throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); try { mConnector.doCommand(String.format("interface ipv6 %s disable", iface)); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate to native daemon for disabling ipv6"); } } public void addRoute(String interfaceName, RouteInfo route) { mContext.enforceCallingOrSelfPermission(CHANGE_NETWORK_STATE, TAG); modifyRoute(interfaceName, ADD, route, DEFAULT); } public void removeRoute(String interfaceName, RouteInfo route) { mContext.enforceCallingOrSelfPermission(CHANGE_NETWORK_STATE, TAG); modifyRoute(interfaceName, REMOVE, route, DEFAULT); } public void addSecondaryRoute(String interfaceName, RouteInfo route) { mContext.enforceCallingOrSelfPermission(CHANGE_NETWORK_STATE, TAG); modifyRoute(interfaceName, ADD, route, SECONDARY); } public void removeSecondaryRoute(String interfaceName, RouteInfo route) { mContext.enforceCallingOrSelfPermission(CHANGE_NETWORK_STATE, TAG); modifyRoute(interfaceName, REMOVE, route, SECONDARY); } private void modifyRoute(String interfaceName, int action, RouteInfo route, String type) { ArrayList rsp; StringBuilder cmd; switch (action) { case ADD: { cmd = new StringBuilder("interface route add " + interfaceName + " " + type); break; } case REMOVE: { cmd = new StringBuilder("interface route remove " + interfaceName + " " + type); break; } default: throw new IllegalStateException("Unknown action type " + action); } // create triplet: dest-ip-addr prefixlength gateway-ip-addr LinkAddress la = route.getDestination(); cmd.append(' '); cmd.append(la.getAddress().getHostAddress()); cmd.append(' '); cmd.append(la.getNetworkPrefixLength()); cmd.append(' '); if (route.getGateway() == null) { if (la.getAddress() instanceof Inet4Address) { cmd.append("0.0.0.0"); } else { cmd.append ("::0"); } } else { cmd.append(route.getGateway().getHostAddress()); } try { rsp = mConnector.doCommand(cmd.toString()); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate with native dameon to add routes - " + e); } if (DBG) { for (String line : rsp) { Log.v(TAG, "add route response is " + line); } } } private ArrayList readRouteList(String filename) { FileInputStream fstream = null; ArrayList list = new ArrayList(); try { fstream = new FileInputStream(filename); DataInputStream in = new DataInputStream(fstream); BufferedReader br = new BufferedReader(new InputStreamReader(in)); String s; // throw away the title line while (((s = br.readLine()) != null) && (s.length() != 0)) { list.add(s); } } catch (IOException ex) { // return current list, possibly empty } finally { if (fstream != null) { try { fstream.close(); } catch (IOException ex) {} } } return list; } public RouteInfo[] getRoutes(String interfaceName) { mContext.enforceCallingOrSelfPermission(ACCESS_NETWORK_STATE, TAG); ArrayList routes = new ArrayList(); // v4 routes listed as: // iface dest-addr gateway-addr flags refcnt use metric netmask mtu window IRTT for (String s : readRouteList("/proc/net/route")) { String[] fields = s.split("\t"); if (fields.length > 7) { String iface = fields[0]; if (interfaceName.equals(iface)) { String dest = fields[1]; String gate = fields[2]; String flags = fields[3]; // future use? String mask = fields[7]; try { // address stored as a hex string, ex: 0014A8C0 InetAddress destAddr = NetworkUtils.intToInetAddress((int)Long.parseLong(dest, 16)); int prefixLength = NetworkUtils.netmaskIntToPrefixLength( (int)Long.parseLong(mask, 16)); LinkAddress linkAddress = new LinkAddress(destAddr, prefixLength); // address stored as a hex string, ex 0014A8C0 InetAddress gatewayAddr = NetworkUtils.intToInetAddress((int)Long.parseLong(gate, 16)); RouteInfo route = new RouteInfo(linkAddress, gatewayAddr); routes.add(route); } catch (Exception e) { Log.e(TAG, "Error parsing route " + s + " : " + e); continue; } } } } // v6 routes listed as: // dest-addr prefixlength ?? ?? gateway-addr ?? ?? ?? ?? iface for (String s : readRouteList("/proc/net/ipv6_route")) { String[]fields = s.split("\\s+"); if (fields.length > 9) { String iface = fields[9].trim(); if (interfaceName.equals(iface)) { String dest = fields[0]; String prefix = fields[1]; String gate = fields[4]; try { // prefix length stored as a hex string, ex 40 int prefixLength = Integer.parseInt(prefix, 16); // address stored as a 32 char hex string // ex fe800000000000000000000000000000 InetAddress destAddr = NetworkUtils.hexToInet6Address(dest); LinkAddress linkAddress = new LinkAddress(destAddr, prefixLength); InetAddress gateAddr = NetworkUtils.hexToInet6Address(gate); RouteInfo route = new RouteInfo(linkAddress, gateAddr); routes.add(route); } catch (Exception e) { Log.e(TAG, "Error parsing route " + s + " : " + e); continue; } } } } return (RouteInfo[]) routes.toArray(new RouteInfo[0]); } public void shutdown() { if (mContext.checkCallingOrSelfPermission( android.Manifest.permission.SHUTDOWN) != PackageManager.PERMISSION_GRANTED) { throw new SecurityException("Requires SHUTDOWN permission"); } Slog.d(TAG, "Shutting down"); } public boolean getIpForwardingEnabled() throws IllegalStateException{ mContext.enforceCallingOrSelfPermission( android.Manifest.permission.ACCESS_NETWORK_STATE, "NetworkManagementService"); ArrayList rsp; try { rsp = mConnector.doCommand("ipfwd status"); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate with native daemon to ipfwd status"); } for (String line : rsp) { String[] tok = line.split(" "); if (tok.length < 3) { Slog.e(TAG, "Malformed response from native daemon: " + line); return false; } int code = Integer.parseInt(tok[0]); if (code == NetdResponseCode.IpFwdStatusResult) { // 211 Forwarding return "enabled".equals(tok[2]); } else { throw new IllegalStateException(String.format("Unexpected response code %d", code)); } } throw new IllegalStateException("Got an empty response"); } public void setIpForwardingEnabled(boolean enable) throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); mConnector.doCommand(String.format("ipfwd %sable", (enable ? "en" : "dis"))); } public void startTethering(String[] dhcpRange) throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); // cmd is "tether start first_start first_stop second_start second_stop ..." // an odd number of addrs will fail String cmd = "tether start"; for (String d : dhcpRange) { cmd += " " + d; } try { mConnector.doCommand(cmd); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException("Unable to communicate to native daemon"); } } public void stopTethering() throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); try { mConnector.doCommand("tether stop"); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException("Unable to communicate to native daemon to stop tether"); } } public boolean isTetheringStarted() throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.ACCESS_NETWORK_STATE, "NetworkManagementService"); ArrayList rsp; try { rsp = mConnector.doCommand("tether status"); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate to native daemon to get tether status"); } for (String line : rsp) { String[] tok = line.split(" "); if (tok.length < 3) { throw new IllegalStateException("Malformed response for tether status: " + line); } int code = Integer.parseInt(tok[0]); if (code == NetdResponseCode.TetherStatusResult) { // XXX: Tethering services ... return "started".equals(tok[2]); } else { throw new IllegalStateException(String.format("Unexpected response code %d", code)); } } throw new IllegalStateException("Got an empty response"); } public void tetherInterface(String iface) throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); try { mConnector.doCommand("tether interface add " + iface); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate to native daemon for adding tether interface"); } } public void untetherInterface(String iface) { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); try { mConnector.doCommand("tether interface remove " + iface); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate to native daemon for removing tether interface"); } } public String[] listTetheredInterfaces() throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.ACCESS_NETWORK_STATE, "NetworkManagementService"); try { return mConnector.doListCommand( "tether interface list", NetdResponseCode.TetherInterfaceListResult); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate to native daemon for listing tether interfaces"); } } public void setDnsForwarders(String[] dns) throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); try { String cmd = "tether dns set"; for (String s : dns) { cmd += " " + NetworkUtils.numericToInetAddress(s).getHostAddress(); } try { mConnector.doCommand(cmd); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate to native daemon for setting tether dns"); } } catch (IllegalArgumentException e) { throw new IllegalStateException("Error resolving dns name", e); } } public String[] getDnsForwarders() throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.ACCESS_NETWORK_STATE, "NetworkManagementService"); try { return mConnector.doListCommand( "tether dns list", NetdResponseCode.TetherDnsFwdTgtListResult); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate to native daemon for listing tether dns"); } } private void modifyNat(String cmd, String internalInterface, String externalInterface) throws SocketException { cmd = String.format("nat %s %s %s", cmd, internalInterface, externalInterface); NetworkInterface internalNetworkInterface = NetworkInterface.getByName(internalInterface); if (internalNetworkInterface == null) { cmd += " 0"; } else { CollectioninterfaceAddresses = internalNetworkInterface.getInterfaceAddresses(); cmd += " " + interfaceAddresses.size(); for (InterfaceAddress ia : interfaceAddresses) { InetAddress addr = NetworkUtils.getNetworkPart(ia.getAddress(), ia.getNetworkPrefixLength()); cmd = cmd + " " + addr.getHostAddress() + "/" + ia.getNetworkPrefixLength(); } } mConnector.doCommand(cmd); } public void enableNat(String internalInterface, String externalInterface) throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); if (DBG) Log.d(TAG, "enableNat(" + internalInterface + ", " + externalInterface + ")"); try { modifyNat("enable", internalInterface, externalInterface); } catch (Exception e) { Log.e(TAG, "enableNat got Exception " + e.toString()); throw new IllegalStateException( "Unable to communicate to native daemon for enabling NAT interface"); } } public void disableNat(String internalInterface, String externalInterface) throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); if (DBG) Log.d(TAG, "disableNat(" + internalInterface + ", " + externalInterface + ")"); try { modifyNat("disable", internalInterface, externalInterface); } catch (Exception e) { Log.e(TAG, "disableNat got Exception " + e.toString()); throw new IllegalStateException( "Unable to communicate to native daemon for disabling NAT interface"); } } public String[] listTtys() throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.ACCESS_NETWORK_STATE, "NetworkManagementService"); try { return mConnector.doListCommand("list_ttys", NetdResponseCode.TtyListResult); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate to native daemon for listing TTYs"); } } public void attachPppd(String tty, String localAddr, String remoteAddr, String dns1Addr, String dns2Addr) throws IllegalStateException { try { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); mConnector.doCommand(String.format("pppd attach %s %s %s %s %s", tty, NetworkUtils.numericToInetAddress(localAddr).getHostAddress(), NetworkUtils.numericToInetAddress(remoteAddr).getHostAddress(), NetworkUtils.numericToInetAddress(dns1Addr).getHostAddress(), NetworkUtils.numericToInetAddress(dns2Addr).getHostAddress())); } catch (IllegalArgumentException e) { throw new IllegalStateException("Error resolving addr", e); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException("Error communicating to native daemon to attach pppd", e); } } public void detachPppd(String tty) throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); try { mConnector.doCommand(String.format("pppd detach %s", tty)); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException("Error communicating to native daemon to detach pppd", e); } } public void startAccessPoint(WifiConfiguration wifiConfig, String wlanIface, String softapIface) throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_WIFI_STATE, "NetworkManagementService"); try { wifiFirmwareReload(wlanIface, "AP"); mConnector.doCommand(String.format("softap start " + wlanIface)); if (wifiConfig == null) { mConnector.doCommand(String.format("softap set " + wlanIface + " " + softapIface)); } else { /** * softap set arg1 arg2 arg3 [arg4 arg5 arg6 arg7 arg8] * argv1 - wlan interface * argv2 - softap interface * argv3 - SSID * argv4 - Security * argv5 - Key * argv6 - Channel * argv7 - Preamble * argv8 - Max SCB */ String str = String.format("softap set " + wlanIface + " " + softapIface + " %s %s %s", convertQuotedString(wifiConfig.SSID), getSecurityType(wifiConfig), convertQuotedString(wifiConfig.preSharedKey)); mConnector.doCommand(str); } mConnector.doCommand(String.format("softap startap")); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException("Error communicating to native daemon to start softap", e); } } private String convertQuotedString(String s) { if (s == null) { return s; } /* Replace \ with \\, then " with \" and add quotes at end */ return '"' + s.replaceAll("\\\\","\\\\\\\\").replaceAll("\"","\\\\\"") + '"'; } private String getSecurityType(WifiConfiguration wifiConfig) { switch (wifiConfig.getAuthType()) { case KeyMgmt.WPA_PSK: return "wpa-psk"; case KeyMgmt.WPA2_PSK: return "wpa2-psk"; default: return "open"; } } /* @param mode can be "AP", "STA" or "P2P" */ public void wifiFirmwareReload(String wlanIface, String mode) throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_WIFI_STATE, "NetworkManagementService"); try { mConnector.doCommand(String.format("softap fwreload " + wlanIface + " " + mode)); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException("Error communicating to native daemon ", e); } } public void stopAccessPoint(String wlanIface) throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_WIFI_STATE, "NetworkManagementService"); try { mConnector.doCommand("softap stopap"); mConnector.doCommand("softap stop " + wlanIface); wifiFirmwareReload(wlanIface, "STA"); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException("Error communicating to native daemon to stop soft AP", e); } } public void setAccessPoint(WifiConfiguration wifiConfig, String wlanIface, String softapIface) throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_WIFI_STATE, "NetworkManagementService"); try { if (wifiConfig == null) { mConnector.doCommand(String.format("softap set " + wlanIface + " " + softapIface)); } else { String str = String.format("softap set " + wlanIface + " " + softapIface + " %s %s %s", convertQuotedString(wifiConfig.SSID), getSecurityType(wifiConfig), convertQuotedString(wifiConfig.preSharedKey)); mConnector.doCommand(str); } } catch (NativeDaemonConnectorException e) { throw new IllegalStateException("Error communicating to native daemon to set soft AP", e); } } private long getInterfaceCounter(String iface, boolean rx) { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.ACCESS_NETWORK_STATE, "NetworkManagementService"); try { String rsp; try { rsp = mConnector.doCommand( String.format("interface read%scounter %s", (rx ? "rx" : "tx"), iface)).get(0); } catch (NativeDaemonConnectorException e1) { Slog.e(TAG, "Error communicating with native daemon", e1); return -1; } String[] tok = rsp.split(" "); if (tok.length < 2) { Slog.e(TAG, String.format("Malformed response for reading %s interface", (rx ? "rx" : "tx"))); return -1; } int code; try { code = Integer.parseInt(tok[0]); } catch (NumberFormatException nfe) { Slog.e(TAG, String.format("Error parsing code %s", tok[0])); return -1; } if ((rx && code != NetdResponseCode.InterfaceRxCounterResult) || ( !rx && code != NetdResponseCode.InterfaceTxCounterResult)) { Slog.e(TAG, String.format("Unexpected response code %d", code)); return -1; } return Long.parseLong(tok[1]); } catch (Exception e) { Slog.e(TAG, String.format( "Failed to read interface %s counters", (rx ? "rx" : "tx")), e); } return -1; } @Override public NetworkStats getNetworkStatsSummary() { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.ACCESS_NETWORK_STATE, "NetworkManagementService"); return mStatsFactory.readNetworkStatsSummary(); } @Override public NetworkStats getNetworkStatsDetail() { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.ACCESS_NETWORK_STATE, "NetworkManagementService"); return mStatsFactory.readNetworkStatsDetail(UID_ALL); } @Override public void setInterfaceQuota(String iface, long quotaBytes) { mContext.enforceCallingOrSelfPermission(MANAGE_NETWORK_POLICY, TAG); // silently discard when control disabled // TODO: eventually migrate to be always enabled if (!mBandwidthControlEnabled) return; synchronized (mQuotaLock) { if (mActiveQuotaIfaces.contains(iface)) { throw new IllegalStateException("iface " + iface + " already has quota"); } final StringBuilder command = new StringBuilder(); command.append("bandwidth setiquota ").append(iface).append(" ").append(quotaBytes); try { // TODO: support quota shared across interfaces mConnector.doCommand(command.toString()); mActiveQuotaIfaces.add(iface); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException("Error communicating to native daemon", e); } } } @Override public void removeInterfaceQuota(String iface) { mContext.enforceCallingOrSelfPermission(MANAGE_NETWORK_POLICY, TAG); // silently discard when control disabled // TODO: eventually migrate to be always enabled if (!mBandwidthControlEnabled) return; synchronized (mQuotaLock) { if (!mActiveQuotaIfaces.contains(iface)) { // TODO: eventually consider throwing return; } final StringBuilder command = new StringBuilder(); command.append("bandwidth removeiquota ").append(iface); mActiveQuotaIfaces.remove(iface); mActiveAlertIfaces.remove(iface); try { // TODO: support quota shared across interfaces mConnector.doCommand(command.toString()); } catch (NativeDaemonConnectorException e) { // TODO: include current iptables state throw new IllegalStateException("Error communicating to native daemon", e); } } } @Override public void setInterfaceAlert(String iface, long alertBytes) { mContext.enforceCallingOrSelfPermission(MANAGE_NETWORK_POLICY, TAG); // silently discard when control disabled // TODO: eventually migrate to be always enabled if (!mBandwidthControlEnabled) return; // quick sanity check if (!mActiveQuotaIfaces.contains(iface)) { throw new IllegalStateException("setting alert requires existing quota on iface"); } synchronized (mQuotaLock) { if (mActiveAlertIfaces.contains(iface)) { throw new IllegalStateException("iface " + iface + " already has alert"); } final StringBuilder command = new StringBuilder(); command.append("bandwidth setinterfacealert ").append(iface).append(" ").append( alertBytes); try { // TODO: support alert shared across interfaces mConnector.doCommand(command.toString()); mActiveAlertIfaces.add(iface); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException("Error communicating to native daemon", e); } } } @Override public void removeInterfaceAlert(String iface) { mContext.enforceCallingOrSelfPermission(MANAGE_NETWORK_POLICY, TAG); // silently discard when control disabled // TODO: eventually migrate to be always enabled if (!mBandwidthControlEnabled) return; synchronized (mQuotaLock) { if (!mActiveAlertIfaces.contains(iface)) { // TODO: eventually consider throwing return; } final StringBuilder command = new StringBuilder(); command.append("bandwidth removeinterfacealert ").append(iface); try { // TODO: support alert shared across interfaces mConnector.doCommand(command.toString()); mActiveAlertIfaces.remove(iface); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException("Error communicating to native daemon", e); } } } @Override public void setGlobalAlert(long alertBytes) { mContext.enforceCallingOrSelfPermission(MANAGE_NETWORK_POLICY, TAG); // silently discard when control disabled // TODO: eventually migrate to be always enabled if (!mBandwidthControlEnabled) return; final StringBuilder command = new StringBuilder(); command.append("bandwidth setglobalalert ").append(alertBytes); try { mConnector.doCommand(command.toString()); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException("Error communicating to native daemon", e); } } @Override public void setUidNetworkRules(int uid, boolean rejectOnQuotaInterfaces) { mContext.enforceCallingOrSelfPermission(MANAGE_NETWORK_POLICY, TAG); // silently discard when control disabled // TODO: eventually migrate to be always enabled if (!mBandwidthControlEnabled) return; synchronized (mUidRejectOnQuota) { final boolean oldRejectOnQuota = mUidRejectOnQuota.get(uid, false); if (oldRejectOnQuota == rejectOnQuotaInterfaces) { // TODO: eventually consider throwing return; } final StringBuilder command = new StringBuilder(); command.append("bandwidth"); if (rejectOnQuotaInterfaces) { command.append(" addnaughtyapps"); } else { command.append(" removenaughtyapps"); } command.append(" ").append(uid); try { mConnector.doCommand(command.toString()); if (rejectOnQuotaInterfaces) { mUidRejectOnQuota.put(uid, true); } else { mUidRejectOnQuota.delete(uid); } } catch (NativeDaemonConnectorException e) { throw new IllegalStateException("Error communicating to native daemon", e); } } } @Override public boolean isBandwidthControlEnabled() { mContext.enforceCallingOrSelfPermission(MANAGE_NETWORK_POLICY, TAG); return mBandwidthControlEnabled; } @Override public NetworkStats getNetworkStatsUidDetail(int uid) { if (Binder.getCallingUid() != uid) { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.ACCESS_NETWORK_STATE, "NetworkManagementService"); } return mStatsFactory.readNetworkStatsDetail(uid); } @Override public NetworkStats getNetworkStatsTethering(String[] ifacePairs) { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.ACCESS_NETWORK_STATE, "NetworkManagementService"); if (ifacePairs.length % 2 != 0) { throw new IllegalArgumentException( "unexpected ifacePairs; length=" + ifacePairs.length); } final NetworkStats stats = new NetworkStats(SystemClock.elapsedRealtime(), 1); for (int i = 0; i < ifacePairs.length; i += 2) { final String ifaceIn = ifacePairs[i]; final String ifaceOut = ifacePairs[i + 1]; if (ifaceIn != null && ifaceOut != null) { stats.combineValues(getNetworkStatsTethering(ifaceIn, ifaceOut)); } } return stats; } private NetworkStats.Entry getNetworkStatsTethering(String ifaceIn, String ifaceOut) { final StringBuilder command = new StringBuilder(); command.append("bandwidth gettetherstats ").append(ifaceIn).append(" ").append(ifaceOut); final String rsp; try { rsp = mConnector.doCommand(command.toString()).get(0); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException("Error communicating to native daemon", e); } final String[] tok = rsp.split(" "); /* Expecting: "code ifaceIn ifaceOut rx_bytes rx_packets tx_bytes tx_packets" */ if (tok.length != 7) { throw new IllegalStateException("Native daemon returned unexpected result: " + rsp); } final int code; try { code = Integer.parseInt(tok[0]); } catch (NumberFormatException e) { throw new IllegalStateException( "Failed to parse native daemon return code for " + ifaceIn + " " + ifaceOut); } if (code != NetdResponseCode.TetheringStatsResult) { throw new IllegalStateException( "Unexpected return code from native daemon for " + ifaceIn + " " + ifaceOut); } try { final NetworkStats.Entry entry = new NetworkStats.Entry(); entry.iface = ifaceIn; entry.uid = UID_TETHERING; entry.set = SET_DEFAULT; entry.tag = TAG_NONE; entry.rxBytes = Long.parseLong(tok[3]); entry.rxPackets = Long.parseLong(tok[4]); entry.txBytes = Long.parseLong(tok[5]); entry.txPackets = Long.parseLong(tok[6]); return entry; } catch (NumberFormatException e) { throw new IllegalStateException( "problem parsing tethering stats for " + ifaceIn + " " + ifaceOut + ": " + e); } } public void setInterfaceThrottle(String iface, int rxKbps, int txKbps) { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); try { mConnector.doCommand(String.format( "interface setthrottle %s %d %d", iface, rxKbps, txKbps)); } catch (NativeDaemonConnectorException e) { Slog.e(TAG, "Error communicating with native daemon to set throttle", e); } } private int getInterfaceThrottle(String iface, boolean rx) { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.ACCESS_NETWORK_STATE, "NetworkManagementService"); try { String rsp; try { rsp = mConnector.doCommand( String.format("interface getthrottle %s %s", iface, (rx ? "rx" : "tx"))).get(0); } catch (NativeDaemonConnectorException e) { Slog.e(TAG, "Error communicating with native daemon to getthrottle", e); return -1; } String[] tok = rsp.split(" "); if (tok.length < 2) { Slog.e(TAG, "Malformed response to getthrottle command"); return -1; } int code; try { code = Integer.parseInt(tok[0]); } catch (NumberFormatException nfe) { Slog.e(TAG, String.format("Error parsing code %s", tok[0])); return -1; } if ((rx && code != NetdResponseCode.InterfaceRxThrottleResult) || ( !rx && code != NetdResponseCode.InterfaceTxThrottleResult)) { Slog.e(TAG, String.format("Unexpected response code %d", code)); return -1; } return Integer.parseInt(tok[1]); } catch (Exception e) { Slog.e(TAG, String.format( "Failed to read interface %s throttle value", (rx ? "rx" : "tx")), e); } return -1; } public int getInterfaceRxThrottle(String iface) { return getInterfaceThrottle(iface, true); } public int getInterfaceTxThrottle(String iface) { return getInterfaceThrottle(iface, false); } public void setDefaultInterfaceForDns(String iface) throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); try { String cmd = "resolver setdefaultif " + iface; mConnector.doCommand(cmd); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Error communicating with native daemon to set default interface", e); } } public void setDnsServersForInterface(String iface, String[] servers) throws IllegalStateException { mContext.enforceCallingOrSelfPermission(android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); try { String cmd = "resolver setifdns " + iface; for (String s : servers) { InetAddress a = NetworkUtils.numericToInetAddress(s); if (a.isAnyLocalAddress() == false) { cmd += " " + a.getHostAddress(); } } mConnector.doCommand(cmd); } catch (IllegalArgumentException e) { throw new IllegalStateException("Error setting dnsn for interface", e); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Error communicating with native daemon to set dns for interface", e); } } public void flushDefaultDnsCache() throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); try { String cmd = "resolver flushdefaultif"; mConnector.doCommand(cmd); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Error communicating with native deamon to flush default interface", e); } } public void flushInterfaceDnsCache(String iface) throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); try { String cmd = "resolver flushif " + iface; mConnector.doCommand(cmd); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Error communicating with native daemon to flush interface " + iface, e); } } /** {@inheritDoc} */ public void monitor() { if (mConnector != null) { mConnector.monitor(); } } @Override protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { mContext.enforceCallingOrSelfPermission(DUMP, TAG); pw.print("Bandwidth control enabled: "); pw.println(mBandwidthControlEnabled); synchronized (mQuotaLock) { pw.print("Active quota ifaces: "); pw.println(mActiveQuotaIfaces.toString()); pw.print("Active alert ifaces: "); pw.println(mActiveAlertIfaces.toString()); } synchronized (mUidRejectOnQuota) { pw.print("UID reject on quota ifaces: ["); final int size = mUidRejectOnQuota.size(); for (int i = 0; i < size; i++) { pw.print(mUidRejectOnQuota.keyAt(i)); if (i < size - 1) pw.print(","); } pw.println("]"); } } }