/* * 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 android.app.PendingIntent; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.res.Resources; import android.content.pm.PackageManager; import android.net.Uri; import android.net.InterfaceConfiguration; import android.net.INetworkManagementEventObserver; import android.net.wifi.WifiConfiguration; import android.net.wifi.WifiConfiguration.KeyMgmt; import android.os.INetworkManagementService; import android.os.Handler; import android.os.SystemProperties; import android.text.TextUtils; import android.util.Log; import android.util.Slog; import java.util.ArrayList; import java.util.NoSuchElementException; import java.util.StringTokenizer; import android.provider.Settings; import android.content.ContentResolver; import android.database.ContentObserver; import java.io.File; import java.io.FileReader; import java.lang.IllegalStateException; import java.net.InetAddress; import java.net.UnknownHostException; import java.util.concurrent.CountDownLatch; /** * @hide */ class NetworkManagementService extends INetworkManagementService.Stub { private static final String TAG = "NetworkManagmentService"; private static final boolean DBG = false; private static final String NETD_TAG = "NetdConnector"; class NetdResponseCode { 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 UsbRNDISStatusResult = 215; 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 InterfaceChange = 600; } /** * 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); private ArrayList mObservers; /** * 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); } 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 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 link status change */ private void notifyInterfaceLinkStatusChanged(String iface, boolean link) { for (INetworkManagementEventObserver obs : mObservers) { try { obs.interfaceLinkStatusChanged(iface, link); } 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) { for (INetworkManagementEventObserver obs : mObservers) { try { obs.interfaceRemoved(iface); } catch (Exception ex) { Slog.w(TAG, "Observer notifier failed", ex); } } } /** * Let us know the daemon is connected */ protected void onConnected() { if (DBG) Slog.d(TAG, "onConnected"); mConnectedSignal.countDown(); } // // Netd Callback handling // class NetdCallbackReceiver implements INativeDaemonConnectorCallbacks { public void onDaemonConnected() { NetworkManagementService.this.onConnected(); new Thread() { public void run() { } }.start(); } public boolean onEvent(int code, String raw, String[] cooked) { if (code == NetdResponseCode.InterfaceChange) { /* * a network interface change occured * Format: "NNN Iface added " * "NNN Iface removed " * "NNN Iface changed " */ 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) { notifyInterfaceLinkStatusChanged(cooked[3], cooked[4].equals("up")); return true; } throw new IllegalStateException( String.format("Invalid event from daemon (%s)", raw)); } 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 { 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.zzz.zzz.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(" "); try { cfg.addr = InetAddress.getByName(st.nextToken(" ")); } catch (UnknownHostException uhe) { Slog.e(TAG, "Failed to parse ipaddr", uhe); } try { cfg.mask = InetAddress.getByName(st.nextToken(" ")); } catch (UnknownHostException uhe) { Slog.e(TAG, "Failed to parse netmask", uhe); } 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 { String cmd = String.format("interface setcfg %s %s %s %s", iface, cfg.addr.getHostAddress(), cfg.mask.getHostAddress(), cfg.interfaceFlags); try { mConnector.doCommand(cmd); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate with native daemon to interface setcfg - " + e); } } 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 += " " + InetAddress.getByName(s).getHostAddress(); } try { mConnector.doCommand(cmd); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Unable to communicate to native daemon for setting tether dns"); } } catch (UnknownHostException 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"); } } public void enableNat(String internalInterface, String externalInterface) throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); try { mConnector.doCommand( String.format("nat enable %s %s", internalInterface, externalInterface)); } catch (NativeDaemonConnectorException e) { 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"); try { mConnector.doCommand( String.format("nat disable %s %s", internalInterface, externalInterface)); } catch (NativeDaemonConnectorException e) { 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, InetAddress.getByName(localAddr).getHostAddress(), InetAddress.getByName(remoteAddr).getHostAddress(), InetAddress.getByName(dns1Addr).getHostAddress(), InetAddress.getByName(dns2Addr).getHostAddress())); } catch (UnknownHostException 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 startUsbRNDIS() throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); try { mConnector.doCommand("usb startrndis"); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Error communicating to native daemon for starting RNDIS", e); } } public void stopUsbRNDIS() throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CHANGE_NETWORK_STATE, "NetworkManagementService"); try { mConnector.doCommand("usb stoprndis"); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException("Error communicating to native daemon", e); } } public boolean isUsbRNDISStarted() throws IllegalStateException { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.ACCESS_NETWORK_STATE, "NetworkManagementService"); ArrayList rsp; try { rsp = mConnector.doCommand("usb rndisstatus"); } catch (NativeDaemonConnectorException e) { throw new IllegalStateException( "Error communicating to native daemon to check RNDIS status", e); } for (String line : rsp) { String []tok = line.split(" "); int code = Integer.parseInt(tok[0]); if (code == NetdResponseCode.UsbRNDISStatusResult) { if (tok[3].equals("started")) return true; return false; } else { throw new IllegalStateException(String.format("Unexpected response code %d", code)); } } throw new IllegalStateException("Got an empty response"); } 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 { mConnector.doCommand(String.format("softap stop " + wlanIface)); mConnector.doCommand(String.format("softap fwreload " + 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), wifiConfig.allowedKeyManagement.get(KeyMgmt.WPA_PSK) ? "wpa2-psk" : "open", 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("\"","\\\\\"") + '"'; } public void stopAccessPoint() 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"); } 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), wifiConfig.allowedKeyManagement.get(KeyMgmt.WPA_PSK) ? "wpa2-psk" : "open", 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; } public long getInterfaceRxCounter(String iface) { return getInterfaceCounter(iface, true); } public long getInterfaceTxCounter(String iface) { return getInterfaceCounter(iface, false); } 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); } }