The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.net; |
| 18 | |
| 19 | import java.net.InetAddress; |
| 20 | import java.net.UnknownHostException; |
| 21 | |
| 22 | /** |
| 23 | * Native methods for managing network interfaces. |
| 24 | * |
| 25 | * {@hide} |
| 26 | */ |
| 27 | public class NetworkUtils { |
Mike Lockwood | 0900f36 | 2009-07-10 17:24:07 -0400 | [diff] [blame] | 28 | /** Bring the named network interface up. */ |
| 29 | public native static int enableInterface(String interfaceName); |
| 30 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 31 | /** Bring the named network interface down. */ |
| 32 | public native static int disableInterface(String interfaceName); |
| 33 | |
| 34 | /** Add a route to the specified host via the named interface. */ |
Robert Greenwalt | 47f69fe | 2010-06-15 15:43:39 -0700 | [diff] [blame^] | 35 | public static int addHostRoute(String interfaceName, InetAddress hostaddr) { |
| 36 | int v4Int = v4StringToInt(hostaddr.getHostAddress()); |
| 37 | if (v4Int != 0) { |
| 38 | return addHostRouteNative(interfaceName, v4Int); |
| 39 | } else { |
| 40 | return -1; |
| 41 | } |
| 42 | } |
| 43 | private native static int addHostRouteNative(String interfaceName, int hostaddr); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 44 | |
| 45 | /** Add a default route for the named interface. */ |
Robert Greenwalt | 47f69fe | 2010-06-15 15:43:39 -0700 | [diff] [blame^] | 46 | public static int setDefaultRoute(String interfaceName, InetAddress gwayAddr) { |
| 47 | int v4Int = v4StringToInt(gwayAddr.getHostAddress()); |
| 48 | if (v4Int != 0) { |
| 49 | return setDefaultRouteNative(interfaceName, v4Int); |
| 50 | } else { |
| 51 | return -1; |
| 52 | } |
| 53 | } |
| 54 | private native static int setDefaultRouteNative(String interfaceName, int hostaddr); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 55 | |
| 56 | /** Return the gateway address for the default route for the named interface. */ |
Robert Greenwalt | 47f69fe | 2010-06-15 15:43:39 -0700 | [diff] [blame^] | 57 | public static InetAddress getDefaultRoute(String interfaceName) { |
| 58 | int addr = getDefaultRouteNative(interfaceName); |
| 59 | try { |
| 60 | return InetAddress.getByAddress(v4IntToArray(addr)); |
| 61 | } catch (UnknownHostException e) { |
| 62 | return null; |
| 63 | } |
| 64 | } |
| 65 | private native static int getDefaultRouteNative(String interfaceName); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 66 | |
| 67 | /** Remove host routes that uses the named interface. */ |
| 68 | public native static int removeHostRoutes(String interfaceName); |
| 69 | |
| 70 | /** Remove the default route for the named interface. */ |
| 71 | public native static int removeDefaultRoute(String interfaceName); |
| 72 | |
| 73 | /** Reset any sockets that are connected via the named interface. */ |
| 74 | public native static int resetConnections(String interfaceName); |
| 75 | |
| 76 | /** |
| 77 | * Start the DHCP client daemon, in order to have it request addresses |
| 78 | * for the named interface, and then configure the interface with those |
| 79 | * addresses. This call blocks until it obtains a result (either success |
| 80 | * or failure) from the daemon. |
| 81 | * @param interfaceName the name of the interface to configure |
| 82 | * @param ipInfo if the request succeeds, this object is filled in with |
| 83 | * the IP address information. |
| 84 | * @return {@code true} for success, {@code false} for failure |
| 85 | */ |
| 86 | public native static boolean runDhcp(String interfaceName, DhcpInfo ipInfo); |
| 87 | |
| 88 | /** |
| 89 | * Shut down the DHCP client daemon. |
| 90 | * @param interfaceName the name of the interface for which the daemon |
| 91 | * should be stopped |
| 92 | * @return {@code true} for success, {@code false} for failure |
| 93 | */ |
| 94 | public native static boolean stopDhcp(String interfaceName); |
| 95 | |
| 96 | /** |
| 97 | * Release the current DHCP lease. |
| 98 | * @param interfaceName the name of the interface for which the lease should |
| 99 | * be released |
| 100 | * @return {@code true} for success, {@code false} for failure |
| 101 | */ |
| 102 | public native static boolean releaseDhcpLease(String interfaceName); |
| 103 | |
| 104 | /** |
| 105 | * Return the last DHCP-related error message that was recorded. |
| 106 | * <p/>NOTE: This string is not localized, but currently it is only |
| 107 | * used in logging. |
| 108 | * @return the most recent error message, if any |
| 109 | */ |
| 110 | public native static String getDhcpError(); |
| 111 | |
| 112 | /** |
| 113 | * When static IP configuration has been specified, configure the network |
| 114 | * interface according to the values supplied. |
| 115 | * @param interfaceName the name of the interface to configure |
| 116 | * @param ipInfo the IP address, default gateway, and DNS server addresses |
| 117 | * with which to configure the interface. |
| 118 | * @return {@code true} for success, {@code false} for failure |
| 119 | */ |
| 120 | public static boolean configureInterface(String interfaceName, DhcpInfo ipInfo) { |
| 121 | return configureNative(interfaceName, |
| 122 | ipInfo.ipAddress, |
| 123 | ipInfo.netmask, |
| 124 | ipInfo.gateway, |
| 125 | ipInfo.dns1, |
| 126 | ipInfo.dns2); |
| 127 | } |
| 128 | |
| 129 | private native static boolean configureNative( |
| 130 | String interfaceName, int ipAddress, int netmask, int gateway, int dns1, int dns2); |
| 131 | |
Robert Greenwalt | 47f69fe | 2010-06-15 15:43:39 -0700 | [diff] [blame^] | 132 | // The following two functions are glue to tie the old int-based address scheme |
| 133 | // to the new InetAddress scheme. They should go away when we go fully to InetAddress |
| 134 | // TODO - remove when we switch fully to InetAddress |
| 135 | public static byte[] v4IntToArray(int addr) { |
| 136 | byte[] addrBytes = new byte[4]; |
| 137 | addrBytes[0] = (byte)(addr & 0xff); |
| 138 | addrBytes[1] = (byte)((addr >> 8) & 0xff); |
| 139 | addrBytes[2] = (byte)((addr >> 16) & 0xff); |
| 140 | addrBytes[3] = (byte)((addr >> 24) & 0xff); |
| 141 | return addrBytes; |
| 142 | } |
| 143 | |
| 144 | public static int v4StringToInt(String str) { |
| 145 | int result = 0; |
| 146 | String[] array = str.split("\\."); |
| 147 | if (array.length != 4) return 0; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 148 | try { |
Robert Greenwalt | 47f69fe | 2010-06-15 15:43:39 -0700 | [diff] [blame^] | 149 | result = Integer.parseInt(array[3]); |
| 150 | result = (result << 8) + Integer.parseInt(array[2]); |
| 151 | result = (result << 8) + Integer.parseInt(array[1]); |
| 152 | result = (result << 8) + Integer.parseInt(array[0]); |
| 153 | } catch (NumberFormatException e) { |
| 154 | return 0; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 155 | } |
Robert Greenwalt | 47f69fe | 2010-06-15 15:43:39 -0700 | [diff] [blame^] | 156 | return result; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 157 | } |
| 158 | } |