Add IpReachabilityMonitor#probeAll() to begin doing DNAv4/v6-like probing

Note that this change is not sufficient to force probing in all cases,
but does cause probing to occur on Linux if the target node hasn't been
confirmed as reachable in the past 5 seconds (delay_first_probe_time).

Bug: 18581716
Bug: 19866451
Bug: 20944464
Change-Id: I29393897118311b48c966c41e2cddb7a784f136f

1 files changed, 49 insertions, 3 deletions

diff --git a/core/tests/coretests/src/android/net/netlink/RtNetlinkNeighborMessageTest.java b/core/tests/coretests/src/android/net/netlink/RtNetlinkNeighborMessageTest.java
index 0634281..a7bebad 100644
--- a/core/tests/coretests/src/android/net/netlink/RtNetlinkNeighborMessageTest.java
+++ b/core/tests/coretests/src/android/net/netlink/RtNetlinkNeighborMessageTest.java
@@ -26,9 +26,11 @@ import android.util.Log;
 import libcore.util.HexEncoding;
 
 import java.net.InetAddress;
+import java.net.Inet4Address;
 import java.net.UnknownHostException;
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
+import java.util.Arrays;
 import junit.framework.TestCase;
 
 
@@ -133,7 +135,7 @@ public class RtNetlinkNeighborMessageTest extends TestCase {
     public static final byte[] RTM_GETNEIGH_RESPONSE =
             HexEncoding.decode(RTM_GETNEIGH_RESPONSE_HEX.replaceAll(" ", "").toCharArray(), false);
 
-    public void testParseRtNetlinkNeighborRtmDelNeigh() {
+    public void testParseRtmDelNeigh() {
         final ByteBuffer byteBuffer = ByteBuffer.wrap(RTM_DELNEIGH);
         byteBuffer.order(ByteOrder.LITTLE_ENDIAN);  // For testing.
         final NetlinkMessage msg = NetlinkMessage.parse(byteBuffer);
@@ -159,7 +161,7 @@ public class RtNetlinkNeighborMessageTest extends TestCase {
         assertEquals(InetAddress.parseNumericAddress("192.168.159.254"), destination);
     }
 
-    public void testParseRtNetlinkNeighborRtmNewNeigh() {
+    public void testParseRtmNewNeigh() {
         final ByteBuffer byteBuffer = ByteBuffer.wrap(RTM_NEWNEIGH);
         byteBuffer.order(ByteOrder.LITTLE_ENDIAN);  // For testing.
         final NetlinkMessage msg = NetlinkMessage.parse(byteBuffer);
@@ -185,7 +187,7 @@ public class RtNetlinkNeighborMessageTest extends TestCase {
         assertEquals(InetAddress.parseNumericAddress("fe80::86c9:b2ff:fe6a:ed4b"), destination);
     }
 
-    public void testParseRtNetlinkNeighborRtmGetNeighResponse() {
+    public void testParseRtmGetNeighResponse() {
         final ByteBuffer byteBuffer = ByteBuffer.wrap(RTM_GETNEIGH_RESPONSE);
         byteBuffer.order(ByteOrder.LITTLE_ENDIAN);  // For testing.
 
@@ -208,4 +210,48 @@ public class RtNetlinkNeighborMessageTest extends TestCase {
         // TODO: add more detailed spot checks.
         assertEquals(14, messageCount);
     }
+
+    public void testCreateRtmNewNeighMessage() {
+        final int seqNo = 2635;
+        final int ifIndex = 14;
+        final byte[] llAddr =
+                new byte[] { (byte) 1, (byte) 2, (byte) 3, (byte) 4, (byte) 5, (byte) 6 };
+
+        // Hexadecimal representation of our created packet.
+        final String expectedNewNeighHex =
+                // struct nlmsghdr
+                "30000000" +     // length = 48
+                "1c00" +         // type = 28 (RTM_NEWNEIGH)
+                "0101" +         // flags (NLM_F_REQUEST | NLM_F_REPLACE)
+                "4b0a0000" +     // seqno
+                "00000000" +     // pid (0 == kernel)
+                // struct ndmsg
+                "02" +           // family
+                "00" +           // pad1
+                "0000" +         // pad2
+                "0e000000" +     // interface index (14)
+                "0800" +         // NUD state (0x08 == NUD_DELAY)
+                "00" +           // flags
+                "00" +           // type
+                // struct nlattr: NDA_DST
+                "0800" +         // length = 8
+                "0100" +         // type (1 == NDA_DST, for neighbor messages)
+                "7f000001" +     // IPv4 address (== 127.0.0.1)
+                // struct nlattr: NDA_LLADDR
+                "0a00" +         // length = 10
+                "0200" +         // type (2 == NDA_LLADDR, for neighbor messages)
+                "010203040506" + // MAC Address (== 01:02:03:04:05:06)
+                "0000";          // padding, for 4 byte alignment
+        final byte[] expectedNewNeigh =
+                HexEncoding.decode(expectedNewNeighHex.toCharArray(), false);
+
+        final byte[] bytes = RtNetlinkNeighborMessage.newNewNeighborMessage(
+            seqNo, Inet4Address.LOOPBACK, StructNdMsg.NUD_DELAY, ifIndex, llAddr);
+        if (!Arrays.equals(expectedNewNeigh, bytes)) {
+            assertEquals(expectedNewNeigh.length, bytes.length);
+            for (int i = 0; i < Math.min(expectedNewNeigh.length, bytes.length); i++) {
+                assertEquals(expectedNewNeigh[i], bytes[i]);
+            }
+        }
+    }
 }