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 up. */ 29 public native static int enableInterface(String interfaceName); 30 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. */ 35 public native static int addHostRoute(String interfaceName, int hostaddr); 36 37 /** Add a default route for the named interface. */ 38 public native static int setDefaultRoute(String interfaceName, int gwayAddr); 39 40 /** Return the gateway address for the default route for the named interface. */ 41 public native static int getDefaultRoute(String interfaceName); 42 43 /** Remove host routes that uses the named interface. */ 44 public native static int removeHostRoutes(String interfaceName); 45 46 /** Remove the default route for the named interface. */ 47 public native static int removeDefaultRoute(String interfaceName); 48 49 /** Reset any sockets that are connected via the named interface. */ 50 public native static int resetConnections(String interfaceName); 51 52 /** 53 * Start the DHCP client daemon, in order to have it request addresses 54 * for the named interface, and then configure the interface with those 55 * addresses. This call blocks until it obtains a result (either success 56 * or failure) from the daemon. 57 * @param interfaceName the name of the interface to configure 58 * @param ipInfo if the request succeeds, this object is filled in with 59 * the IP address information. 60 * @return {@code true} for success, {@code false} for failure 61 */ 62 public native static boolean runDhcp(String interfaceName, DhcpInfo ipInfo); 63 64 /** 65 * Shut down the DHCP client daemon. 66 * @param interfaceName the name of the interface for which the daemon 67 * should be stopped 68 * @return {@code true} for success, {@code false} for failure 69 */ 70 public native static boolean stopDhcp(String interfaceName); 71 72 /** 73 * Release the current DHCP lease. 74 * @param interfaceName the name of the interface for which the lease should 75 * be released 76 * @return {@code true} for success, {@code false} for failure 77 */ 78 public native static boolean releaseDhcpLease(String interfaceName); 79 80 /** 81 * Return the last DHCP-related error message that was recorded. 82 * <p/>NOTE: This string is not localized, but currently it is only 83 * used in logging. 84 * @return the most recent error message, if any 85 */ 86 public native static String getDhcpError(); 87 88 /** 89 * When static IP configuration has been specified, configure the network 90 * interface according to the values supplied. 91 * @param interfaceName the name of the interface to configure 92 * @param ipInfo the IP address, default gateway, and DNS server addresses 93 * with which to configure the interface. 94 * @return {@code true} for success, {@code false} for failure 95 */ 96 public static boolean configureInterface(String interfaceName, DhcpInfo ipInfo) { 97 return configureNative(interfaceName, 98 ipInfo.ipAddress, 99 ipInfo.netmask, 100 ipInfo.gateway, 101 ipInfo.dns1, 102 ipInfo.dns2); 103 } 104 105 private native static boolean configureNative( 106 String interfaceName, int ipAddress, int netmask, int gateway, int dns1, int dns2); 107 108 /** 109 * Look up a host name and return the result as an int. Works if the argument 110 * is an IP address in dot notation. Obviously, this can only be used for IPv4 111 * addresses. 112 * @param hostname the name of the host (or the IP address) 113 * @return the IP address as an {@code int} in network byte order 114 */ 115 public static int lookupHost(String hostname) { 116 InetAddress inetAddress; 117 try { 118 inetAddress = InetAddress.getByName(hostname); 119 } catch (UnknownHostException e) { 120 return -1; 121 } 122 byte[] addrBytes; 123 int addr; 124 addrBytes = inetAddress.getAddress(); 125 addr = ((addrBytes[3] & 0xff) << 24) 126 | ((addrBytes[2] & 0xff) << 16) 127 | ((addrBytes[1] & 0xff) << 8) 128 | (addrBytes[0] & 0xff); 129 return addr; 130 } 131 132 public static int v4StringToInt(String str) { 133 int result = 0; 134 String[] array = str.split("\\."); 135 if (array.length != 4) return 0; 136 try { 137 result = Integer.parseInt(array[3]); 138 result = (result << 8) + Integer.parseInt(array[2]); 139 result = (result << 8) + Integer.parseInt(array[1]); 140 result = (result << 8) + Integer.parseInt(array[0]); 141 } catch (NumberFormatException e) { 142 return 0; 143 } 144 return result; 145 } 146 147 /** 148 * Start the DHCP renew service for wimax, 149 * This call blocks until it obtains a result (either success 150 * or failure) from the daemon. 151 * @param interfaceName the name of the interface to configure 152 * @param ipInfo if the request succeeds, this object is filled in with 153 * the IP address information. 154 * @return {@code true} for success, {@code false} for failure 155 * {@hide} 156 */ 157 public native static boolean runDhcpRenew(String interfaceName, DhcpInfo ipInfo); 158 } 159
