Switch to use netd to add/remove routes.
Also adds support for v6 routes and for removing single routes.
Change-Id: I1c4f08c7938371090944d8d6f603e1e0d6d70c01
diff --git a/services/java/com/android/server/NetworkManagementService.java b/services/java/com/android/server/NetworkManagementService.java
index 44f5df2..0b4b958 100644
--- a/services/java/com/android/server/NetworkManagementService.java
+++ b/services/java/com/android/server/NetworkManagementService.java
@@ -28,6 +28,7 @@
import android.net.INetworkManagementEventObserver;
import android.net.LinkAddress;
import android.net.NetworkUtils;
+import android.net.RouteInfo;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiConfiguration.KeyMgmt;
import android.os.INetworkManagementService;
@@ -43,11 +44,16 @@
import android.content.ContentResolver;
import android.database.ContentObserver;
+import java.io.BufferedReader;
+import java.io.DataInputStream;
import java.io.File;
+import java.io.FileInputStream;
import java.io.FileReader;
+import java.io.InputStreamReader;
+import java.io.IOException;
import java.lang.IllegalStateException;
-
import java.net.InetAddress;
+import java.net.Inet4Address;
import java.net.UnknownHostException;
import java.util.concurrent.CountDownLatch;
@@ -60,6 +66,9 @@
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;
+
class NetdResponseCode {
public static final int InterfaceListResult = 110;
public static final int TetherInterfaceListResult = 111;
@@ -309,6 +318,164 @@
}
}
+ public void addRoute(String interfaceName, RouteInfo route) {
+ modifyRoute(interfaceName, ADD, route);
+ }
+
+ public void removeRoute(String interfaceName, RouteInfo route) {
+ modifyRoute(interfaceName, REMOVE, route);
+ }
+
+ private void modifyRoute(String interfaceName, int action, RouteInfo route) {
+ ArrayList<String> rsp;
+
+ StringBuilder cmd;
+
+ switch (action) {
+ case ADD:
+ {
+ cmd = new StringBuilder("interface route add " + interfaceName);
+ break;
+ }
+ case REMOVE:
+ {
+ cmd = new StringBuilder("interface route remove " + interfaceName);
+ 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);
+ }
+
+ for (String line : rsp) {
+ Log.v(TAG, "add route response is " + line);
+ }
+ }
+
+ private ArrayList<String> readRouteList(String filename) {
+ FileInputStream fstream = null;
+ ArrayList<String> list = new ArrayList<String>();
+
+ 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) {
+ ArrayList<RouteInfo> routes = new ArrayList<RouteInfo>();
+
+ // 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)