diff --git a/core/java/android/net/INetworkManagementEventObserver.aidl b/core/java/android/net/INetworkManagementEventObserver.aidl
index c720c7b..405a897 100644
--- a/core/java/android/net/INetworkManagementEventObserver.aidl
+++ b/core/java/android/net/INetworkManagementEventObserver.aidl
@@ -16,6 +16,8 @@
 
 package android.net;
 
+import android.net.LinkAddress;
+
 /**
  * Callback class for receiving events from an INetworkManagementService
  *
@@ -62,7 +64,7 @@
      * @param flags The address flags.
      * @param scope The address scope.
      */
-    void addressUpdated(String address, String iface, int flags, int scope);
+    void addressUpdated(in LinkAddress address, String iface, int flags, int scope);
 
     /**
      * An interface address has been removed
@@ -72,7 +74,7 @@
      * @param flags The address flags.
      * @param scope The address scope.
      */
-    void addressRemoved(String address, String iface, int flags, int scope);
+    void addressRemoved(in LinkAddress address, String iface, int flags, int scope);
 
     /**
      * A networking quota limit has been reached. The quota might not
diff --git a/core/java/com/android/server/net/BaseNetworkObserver.java b/core/java/com/android/server/net/BaseNetworkObserver.java
index a02c602..1e80a21 100644
--- a/core/java/com/android/server/net/BaseNetworkObserver.java
+++ b/core/java/com/android/server/net/BaseNetworkObserver.java
@@ -17,6 +17,7 @@
 package com.android.server.net;
 
 import android.net.INetworkManagementEventObserver;
+import android.net.LinkAddress;
 
 /**
  * Base {@link INetworkManagementEventObserver} that provides no-op
@@ -36,12 +37,12 @@
     }
 
     @Override
-    public void addressUpdated(String address, String iface, int flags, int scope) {
+    public void addressUpdated(LinkAddress address, String iface, int flags, int scope) {
         // default no-op
     }
 
     @Override
-    public void addressRemoved(String address, String iface, int flags, int scope) {
+    public void addressRemoved(LinkAddress address, String iface, int flags, int scope) {
         // default no-op
     }
 
diff --git a/services/java/com/android/server/NetworkManagementService.java b/services/java/com/android/server/NetworkManagementService.java
index 8089fbc..40ea49e 100644
--- a/services/java/com/android/server/NetworkManagementService.java
+++ b/services/java/com/android/server/NetworkManagementService.java
@@ -405,7 +405,7 @@
     /**
      * Notify our observers of a new or updated interface address.
      */
-    private void notifyAddressUpdated(String address, String iface, int flags, int scope) {
+    private void notifyAddressUpdated(LinkAddress address, String iface, int flags, int scope) {
         final int length = mObservers.beginBroadcast();
         for (int i = 0; i < length; i++) {
             try {
@@ -420,7 +420,7 @@
     /**
      * Notify our observers of a deleted interface address.
      */
-    private void notifyAddressRemoved(String address, String iface, int flags, int scope) {
+    private void notifyAddressRemoved(LinkAddress address, String iface, int flags, int scope) {
         final int length = mObservers.beginBroadcast();
         for (int i = 0; i < length; i++) {
             try {
@@ -537,17 +537,21 @@
 
                     int flags;
                     int scope;
+                    LinkAddress address;
                     try {
                         flags = Integer.parseInt(cooked[5]);
                         scope = Integer.parseInt(cooked[6]);
-                    } catch(NumberFormatException e) {
-                        throw new IllegalStateException(errorMessage);
+                        address = new LinkAddress(cooked[3]);
+                    } catch(NumberFormatException e) {     // Non-numeric lifetime or scope.
+                        throw new IllegalStateException(errorMessage, e);
+                    } catch(IllegalArgumentException e) {  // Malformed IP address.
+                        throw new IllegalStateException(errorMessage, e);
                     }
 
                     if (cooked[2].equals("updated")) {
-                        notifyAddressUpdated(cooked[3], cooked[4], flags, scope);
+                        notifyAddressUpdated(address, cooked[4], flags, scope);
                     } else {
-                        notifyAddressRemoved(cooked[3], cooked[4], flags, scope);
+                        notifyAddressRemoved(address, cooked[4], flags, scope);
                     }
                     return true;
                     // break;
diff --git a/services/tests/servicestests/src/com/android/server/NetworkManagementServiceTest.java b/services/tests/servicestests/src/com/android/server/NetworkManagementServiceTest.java
index 4385dcd..a78e7b6 100644
--- a/services/tests/servicestests/src/com/android/server/NetworkManagementServiceTest.java
+++ b/services/tests/servicestests/src/com/android/server/NetworkManagementServiceTest.java
@@ -17,6 +17,7 @@
 package com.android.server;
 
 import android.content.Context;
+import android.net.LinkAddress;
 import android.net.LocalSocket;
 import android.net.LocalServerSocket;
 import android.os.Binder;
@@ -157,19 +158,22 @@
          * IP address changes.
          */
         sendMessage("614 Address updated fe80::1/64 wlan0 128 253");
-        expectSoon(observer).addressUpdated("fe80::1/64", "wlan0", 128, 253);
+        expectSoon(observer).addressUpdated(
+                new LinkAddress("fe80::1/64"), "wlan0", 128, 253);
 
-        // There is no "added".
+        // There is no "added", so we take this as "removed".
         sendMessage("614 Address added fe80::1/64 wlan0 128 253");
-        expectSoon(observer).addressRemoved("fe80::1/64", "wlan0", 128, 253);
+        expectSoon(observer).addressRemoved(
+                new LinkAddress("fe80::1/64"), "wlan0", 128, 253);
 
         sendMessage("614 Address removed 2001:db8::1/64 wlan0 1 0");
-        expectSoon(observer).addressRemoved("2001:db8::1/64", "wlan0", 1, 0);
+        expectSoon(observer).addressRemoved(
+                new LinkAddress("2001:db8::1/64"), "wlan0", 1, 0);
 
         sendMessage("614 Address removed 2001:db8::1/64 wlan0 1");
         // Not enough arguments.
 
-        sendMessage("666 Address added 2001:db8::1/64 wlan0 1 0");
+        sendMessage("666 Address removed 2001:db8::1/64 wlan0 1 0");
         // Invalid code.
 
 
diff --git a/wifi/java/android/net/wifi/WifiStateMachine.java b/wifi/java/android/net/wifi/WifiStateMachine.java
index 4bc3dda..60c7f03 100644
--- a/wifi/java/android/net/wifi/WifiStateMachine.java
+++ b/wifi/java/android/net/wifi/WifiStateMachine.java
@@ -240,24 +240,24 @@
         }
 
         @Override
-        public void addressUpdated(String address, String iface, int flags, int scope) {
+        public void addressUpdated(LinkAddress address, String iface, int flags, int scope) {
             if (mWifiStateMachine.mInterfaceName.equals(iface)) {
                 if (DBG) {
                     log("addressUpdated: " + address + " on " + iface +
                         " flags " + flags + " scope " + scope);
                 }
-                mWifiStateMachine.sendMessage(CMD_IP_ADDRESS_UPDATED, new LinkAddress(address));
+                mWifiStateMachine.sendMessage(CMD_IP_ADDRESS_UPDATED, address);
             }
         }
 
         @Override
-        public void addressRemoved(String address, String iface, int flags, int scope) {
+        public void addressRemoved(LinkAddress address, String iface, int flags, int scope) {
             if (mWifiStateMachine.mInterfaceName.equals(iface)) {
                 if (DBG) {
                     log("addressRemoved: " + address + " on " + iface +
                         " flags " + flags + " scope " + scope);
                 }
-                mWifiStateMachine.sendMessage(CMD_IP_ADDRESS_REMOVED, new LinkAddress(address));
+                mWifiStateMachine.sendMessage(CMD_IP_ADDRESS_REMOVED, address);
             }
         }
     }