Merge "Define MacAddress class"
diff --git a/core/java/android/net/MacAddress.java b/core/java/android/net/MacAddress.java
new file mode 100644
index 0000000..e76d17d
--- /dev/null
+++ b/core/java/android/net/MacAddress.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2017 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 com.android.internal.annotations.VisibleForTesting;
+
+import java.util.Arrays;
+
+/**
+ * @hide
+ */
+public final class MacAddress {
+
+ // TODO: add isLocallyAssigned().
+ // TODO: add getRandomAddress() factory method.
+
+ private static final int ETHER_ADDR_LEN = 6;
+ private static final byte FF = (byte) 0xff;
+ @VisibleForTesting
+ static final byte[] ETHER_ADDR_BROADCAST = { FF, FF, FF, FF, FF, FF };
+
+ public enum MacAddressType {
+ UNICAST,
+ MULTICAST,
+ BROADCAST;
+ }
+
+ /** Return true if the given byte array is not null and has the length of a mac address. */
+ public static boolean isMacAddress(byte[] addr) {
+ return addr != null && addr.length == ETHER_ADDR_LEN;
+ }
+
+ /**
+ * Return the MacAddressType of the mac address represented by the given byte array,
+ * or null if the given byte array does not represent an mac address. */
+ public static MacAddressType macAddressType(byte[] addr) {
+ if (!isMacAddress(addr)) {
+ return null;
+ }
+ if (Arrays.equals(addr, ETHER_ADDR_BROADCAST)) {
+ return MacAddressType.BROADCAST;
+ }
+ if ((addr[0] & 0x01) == 1) {
+ return MacAddressType.MULTICAST;
+ }
+ return MacAddressType.UNICAST;
+ }
+}
diff --git a/tests/net/java/android/net/MacAddressTest.java b/tests/net/java/android/net/MacAddressTest.java
new file mode 100644
index 0000000..3fa9c3a
--- /dev/null
+++ b/tests/net/java/android/net/MacAddressTest.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2017 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 static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.assertFalse;
+
+import android.net.MacAddress.MacAddressType;
+import android.support.test.filters.SmallTest;
+import android.support.test.runner.AndroidJUnit4;
+
+import java.util.Arrays;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class MacAddressTest {
+
+ static class AddrTypeTestCase {
+ byte[] addr;
+ MacAddressType expected;
+
+ static AddrTypeTestCase of(MacAddressType expected, int... addr) {
+ AddrTypeTestCase t = new AddrTypeTestCase();
+ t.expected = expected;
+ t.addr = toByteArray(addr);
+ return t;
+ }
+ }
+
+ @Test
+ public void testMacAddrTypes() {
+ AddrTypeTestCase[] testcases = {
+ AddrTypeTestCase.of(null),
+ AddrTypeTestCase.of(null, 0),
+ AddrTypeTestCase.of(null, 1, 2, 3, 4, 5),
+ AddrTypeTestCase.of(null, 1, 2, 3, 4, 5, 6, 7),
+ AddrTypeTestCase.of(MacAddressType.UNICAST, 0xa0, 0xb0, 0xc0, 0xd0, 0xe0, 0xf0),
+ AddrTypeTestCase.of(MacAddressType.BROADCAST, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff),
+ AddrTypeTestCase.of(MacAddressType.MULTICAST, 1, 2, 3, 4, 5, 6),
+ AddrTypeTestCase.of(MacAddressType.MULTICAST, 11, 22, 33, 44, 55, 66),
+ AddrTypeTestCase.of(MacAddressType.MULTICAST, 33, 33, 0xaa, 0xbb, 0xcc, 0xdd)
+ };
+
+ for (AddrTypeTestCase t : testcases) {
+ MacAddressType got = MacAddress.macAddressType(t.addr);
+ String msg = String.format("expected type of %s to be %s, but got %s",
+ Arrays.toString(t.addr), t.expected, got);
+ assertEquals(msg, t.expected, got);
+ }
+ }
+
+ static byte[] toByteArray(int[] in) {
+ byte[] out = new byte[in.length];
+ for (int i = 0; i < in.length; i++) {
+ out[i] = (byte) in[i];
+ }
+ return out;
+ }
+}