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 { |
| 28 | /** Bring the named network interface down. */ |
| 29 | public native static int disableInterface(String interfaceName); |
| 30 | |
| 31 | /** Add a route to the specified host via the named interface. */ |
| 32 | public native static int addHostRoute(String interfaceName, int hostaddr); |
| 33 | |
| 34 | /** Add a default route for the named interface. */ |
| 35 | public native static int setDefaultRoute(String interfaceName, int gwayAddr); |
| 36 | |
| 37 | /** Return the gateway address for the default route for the named interface. */ |
| 38 | public native static int getDefaultRoute(String interfaceName); |
| 39 | |
| 40 | /** Remove host routes that uses the named interface. */ |
| 41 | public native static int removeHostRoutes(String interfaceName); |
| 42 | |
| 43 | /** Remove the default route for the named interface. */ |
| 44 | public native static int removeDefaultRoute(String interfaceName); |
| 45 | |
| 46 | /** Reset any sockets that are connected via the named interface. */ |
| 47 | public native static int resetConnections(String interfaceName); |
| 48 | |
| 49 | /** |
| 50 | * Start the DHCP client daemon, in order to have it request addresses |
| 51 | * for the named interface, and then configure the interface with those |
| 52 | * addresses. This call blocks until it obtains a result (either success |
| 53 | * or failure) from the daemon. |
| 54 | * @param interfaceName the name of the interface to configure |
| 55 | * @param ipInfo if the request succeeds, this object is filled in with |
| 56 | * the IP address information. |
| 57 | * @return {@code true} for success, {@code false} for failure |
| 58 | */ |
| 59 | public native static boolean runDhcp(String interfaceName, DhcpInfo ipInfo); |
| 60 | |
| 61 | /** |
| 62 | * Shut down the DHCP client daemon. |
| 63 | * @param interfaceName the name of the interface for which the daemon |
| 64 | * should be stopped |
| 65 | * @return {@code true} for success, {@code false} for failure |
| 66 | */ |
| 67 | public native static boolean stopDhcp(String interfaceName); |
| 68 | |
| 69 | /** |
| 70 | * Release the current DHCP lease. |
| 71 | * @param interfaceName the name of the interface for which the lease should |
| 72 | * be released |
| 73 | * @return {@code true} for success, {@code false} for failure |
| 74 | */ |
| 75 | public native static boolean releaseDhcpLease(String interfaceName); |
| 76 | |
| 77 | /** |
| 78 | * Return the last DHCP-related error message that was recorded. |
| 79 | * <p/>NOTE: This string is not localized, but currently it is only |
| 80 | * used in logging. |
| 81 | * @return the most recent error message, if any |
| 82 | */ |
| 83 | public native static String getDhcpError(); |
| 84 | |
| 85 | /** |
| 86 | * When static IP configuration has been specified, configure the network |
| 87 | * interface according to the values supplied. |
| 88 | * @param interfaceName the name of the interface to configure |
| 89 | * @param ipInfo the IP address, default gateway, and DNS server addresses |
| 90 | * with which to configure the interface. |
| 91 | * @return {@code true} for success, {@code false} for failure |
| 92 | */ |
| 93 | public static boolean configureInterface(String interfaceName, DhcpInfo ipInfo) { |
| 94 | return configureNative(interfaceName, |
| 95 | ipInfo.ipAddress, |
| 96 | ipInfo.netmask, |
| 97 | ipInfo.gateway, |
| 98 | ipInfo.dns1, |
| 99 | ipInfo.dns2); |
| 100 | } |
| 101 | |
| 102 | private native static boolean configureNative( |
| 103 | String interfaceName, int ipAddress, int netmask, int gateway, int dns1, int dns2); |
| 104 | |
| 105 | /** |
| 106 | * Look up a host name and return the result as an int. Works if the argument |
| 107 | * is an IP address in dot notation. Obviously, this can only be used for IPv4 |
| 108 | * addresses. |
| 109 | * @param hostname the name of the host (or the IP address) |
| 110 | * @return the IP address as an {@code int} in network byte order |
| 111 | */ |
| 112 | public static int lookupHost(String hostname) { |
| 113 | InetAddress inetAddress; |
| 114 | try { |
| 115 | inetAddress = InetAddress.getByName(hostname); |
| 116 | } catch (UnknownHostException e) { |
| 117 | return -1; |
| 118 | } |
| 119 | byte[] addrBytes; |
| 120 | int addr; |
| 121 | addrBytes = inetAddress.getAddress(); |
| 122 | addr = ((addrBytes[3] & 0xff) << 24) |
| 123 | | ((addrBytes[2] & 0xff) << 16) |
| 124 | | ((addrBytes[1] & 0xff) << 8) |
| 125 | | (addrBytes[0] & 0xff); |
| 126 | return addr; |
| 127 | } |
| 128 | } |