tethering: DAD Proxy Daemon
DAD proxy daemon responsible for forwarding NS/NA between
tethered iface and upstream iface.
Change-Id: I2e58e10e7fa7dba6a6f63ad03b000549f3afc37e
diff --git a/Tethering/src/android/net/util/TetheringUtils.java b/Tethering/src/android/net/util/TetheringUtils.java
index b17b4ba..53b54f7 100644
--- a/Tethering/src/android/net/util/TetheringUtils.java
+++ b/Tethering/src/android/net/util/TetheringUtils.java
@@ -17,11 +17,15 @@
import android.net.TetherStatsParcel;
import android.net.TetheringRequestParcel;
+import android.util.Log;
import androidx.annotation.NonNull;
import java.io.FileDescriptor;
+import java.net.Inet6Address;
import java.net.SocketException;
+import java.net.UnknownHostException;
+import java.util.Arrays;
import java.util.Objects;
/**
@@ -30,6 +34,24 @@
* {@hide}
*/
public class TetheringUtils {
+ public static final byte[] ALL_NODES = new byte[] {
+ (byte) 0xff, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
+ };
+
+ /**
+ * Configures a socket for receiving and sending ICMPv6 neighbor advertisments.
+ * @param fd the socket's {@link FileDescriptor}.
+ */
+ public static native void setupNaSocket(FileDescriptor fd)
+ throws SocketException;
+
+ /**
+ * Configures a socket for receiving and sending ICMPv6 neighbor solicitations.
+ * @param fd the socket's {@link FileDescriptor}.
+ */
+ public static native void setupNsSocket(FileDescriptor fd)
+ throws SocketException;
+
/**
* The object which records offload Tx/Rx forwarded bytes/packets.
* TODO: Replace the inner class ForwardedStats of class OffloadHardwareInterface with
@@ -129,4 +151,15 @@
&& request.exemptFromEntitlementCheck == otherRequest.exemptFromEntitlementCheck
&& request.showProvisioningUi == otherRequest.showProvisioningUi;
}
+
+ /** Get inet6 address for all nodes given scope ID. */
+ public static Inet6Address getAllNodesForScopeId(int scopeId) {
+ try {
+ return Inet6Address.getByAddress("ff02::1", ALL_NODES, scopeId);
+ } catch (UnknownHostException uhe) {
+ Log.wtf("TetheringUtils", "Failed to construct Inet6Address from "
+ + Arrays.toString(ALL_NODES) + " and scopedId " + scopeId);
+ return null;
+ }
+ }
}