Initial Contribution

1 files changed, 120 insertions, 0 deletions

diff --git a/core/java/android/net/NetworkUtils.java b/core/java/android/net/NetworkUtils.java
new file mode 100644
index 0000000..129248a
--- /dev/null
+++ b/core/java/android/net/NetworkUtils.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) 2008 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 android.net;
+
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+
+/**
+ * Native methods for managing network interfaces.
+ *
+ * {@hide}
+ */
+public class NetworkUtils {
+    /** Bring the named network interface down. */
+    public native static int disableInterface(String interfaceName);
+
+    /** Add a route to the specified host via the named interface. */
+    public native static int addHostRoute(String interfaceName, int hostaddr);
+
+    /** Add a default route for the named interface. */
+    public native static int setDefaultRoute(String interfaceName, int gwayAddr);
+
+    /** Return the gateway address for the default route for the named interface. */
+    public native static int getDefaultRoute(String interfaceName);
+
+    /** Remove host routes that uses the named interface. */
+    public native static int removeHostRoutes(String interfaceName);
+
+    /** Remove the default route for the named interface. */
+    public native static int removeDefaultRoute(String interfaceName);
+
+    /** Reset any sockets that are connected via the named interface. */
+    public native static int resetConnections(String interfaceName);
+
+    /**
+     * Start the DHCP client daemon, in order to have it request addresses
+     * for the named interface, and then configure the interface with those
+     * addresses. This call blocks until it obtains a result (either success
+     * or failure) from the daemon.
+     * @param interfaceName the name of the interface to configure
+     * @param ipInfo if the request succeeds, this object is filled in with
+     * the IP address information.
+     * @return {@code true} for success, {@code false} for failure
+     */
+    public native static boolean runDhcp(String interfaceName, DhcpInfo ipInfo);
+
+    /**
+     * Shut down the DHCP client daemon.
+     * @param interfaceName the name of the interface for which the daemon
+     * should be stopped
+     * @return {@code true} for success, {@code false} for failure
+     */
+    public native static boolean stopDhcp(String interfaceName);
+
+    /**
+     * Return the last DHCP-related error message that was recorded.
+     * <p/>NOTE: This string is not localized, but currently it is only
+     * used in logging.
+     * @return the most recent error message, if any
+     */
+    public native static String getDhcpError();
+
+    /**
+     * When static IP configuration has been specified, configure the network
+     * interface according to the values supplied.
+     * @param interfaceName the name of the interface to configure
+     * @param ipInfo the IP address, default gateway, and DNS server addresses
+     * with which to configure the interface.
+     * @return {@code true} for success, {@code false} for failure
+     */
+    public static boolean configureInterface(String interfaceName, DhcpInfo ipInfo) {
+        return configureNative(interfaceName,
+            ipInfo.ipAddress,
+            ipInfo.netmask,
+            ipInfo.gateway,
+            ipInfo.dns1,
+            ipInfo.dns2);
+    }
+
+    private native static boolean configureNative(
+        String interfaceName, int ipAddress, int netmask, int gateway, int dns1, int dns2);
+
+    /**
+     * Look up a host name and return the result as an int. Works if the argument
+     * is an IP address in dot notation. Obviously, this can only be used for IPv4
+     * addresses.
+     * @param hostname the name of the host (or the IP address)
+     * @return the IP address as an {@code int} in network byte order
+     */
+    public static int lookupHost(String hostname) {
+        InetAddress inetAddress;
+        try {
+            inetAddress = InetAddress.getByName(hostname);
+        } catch (UnknownHostException e) {
+            return -1;
+        }
+        byte[] addrBytes;
+        int addr;
+        addrBytes = inetAddress.getAddress();
+        addr = ((addrBytes[3] & 0xff) << 24)
+                | ((addrBytes[2] & 0xff) << 16)
+                | ((addrBytes[1] & 0xff) << 8)
+                |  (addrBytes[0] & 0xff);
+        return addr;
+    }
+}