Add equals() for IpSecAlgorithm and IpSecConfig

Add equality testing methods to support tests
for parceling and un-parceling IpSecConfig.

Bug: 38397094
Test: runtest -x IpSecConfigTest.java
Change-Id: I31e318334d39ed6e9daf5ec8f3be7dcec75e12ad

tests/net/java/android/net/IpSecConfigTest.java

@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 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.assertNull;
+import static org.junit.Assert.assertTrue;
+
+import android.os.Parcel;
+import android.support.test.filters.SmallTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@link IpSecConfig}. */
+@SmallTest
+@RunWith(JUnit4.class)
+public class IpSecConfigTest {
+
+    @Test
+    public void testDefaults() throws Exception {
+        IpSecConfig c = new IpSecConfig();
+        assertEquals(IpSecTransform.MODE_TRANSPORT, c.getMode());
+        assertEquals("", c.getLocalAddress());
+        assertEquals("", c.getRemoteAddress());
+        assertNull(c.getNetwork());
+        assertEquals(IpSecTransform.ENCAP_NONE, c.getEncapType());
+        assertEquals(IpSecManager.INVALID_RESOURCE_ID, c.getEncapSocketResourceId());
+        assertEquals(0, c.getEncapRemotePort());
+        assertEquals(0, c.getNattKeepaliveInterval());
+        for (int direction :
+                new int[] {IpSecTransform.DIRECTION_OUT, IpSecTransform.DIRECTION_IN}) {
+            assertNull(c.getEncryption(direction));
+            assertNull(c.getAuthentication(direction));
+            assertEquals(IpSecManager.INVALID_RESOURCE_ID, c.getSpiResourceId(direction));
+        }
+    }
+
+    @Test
+    public void testParcelUnparcel() throws Exception {
+        assertParcelingIsLossless(new IpSecConfig());
+
+        IpSecConfig c = new IpSecConfig();
+        c.setMode(IpSecTransform.MODE_TUNNEL);
+        c.setLocalAddress("0.0.0.0");
+        c.setRemoteAddress("1.2.3.4");
+        c.setEncapType(android.system.OsConstants.UDP_ENCAP_ESPINUDP);
+        c.setEncapSocketResourceId(7);
+        c.setEncapRemotePort(22);
+        c.setNattKeepaliveInterval(42);
+        c.setEncryption(
+                IpSecTransform.DIRECTION_OUT,
+                new IpSecAlgorithm(
+                        IpSecAlgorithm.CRYPT_AES_CBC,
+                        new byte[] {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xA, 0xB, 0xC, 0xD, 0xE, 0xF}));
+        c.setAuthentication(
+                IpSecTransform.DIRECTION_OUT,
+                new IpSecAlgorithm(
+                        IpSecAlgorithm.AUTH_HMAC_SHA1,
+                        new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 0xA, 0xB, 0xC, 0xD, 0xE, 0xF, 0}));
+        c.setSpiResourceId(IpSecTransform.DIRECTION_OUT, 1984);
+        c.setEncryption(
+                IpSecTransform.DIRECTION_IN,
+                new IpSecAlgorithm(
+                        IpSecAlgorithm.CRYPT_AES_CBC,
+                        new byte[] {2, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xA, 0xB, 0xC, 0xD, 0xE, 0xF}));
+        c.setAuthentication(
+                IpSecTransform.DIRECTION_IN,
+                new IpSecAlgorithm(
+                        IpSecAlgorithm.AUTH_HMAC_SHA1,
+                        new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 0xA, 0xB, 0xC, 0xD, 0xE, 0xF, 1}));
+        c.setSpiResourceId(IpSecTransform.DIRECTION_IN, 99);
+        assertParcelingIsLossless(c);
+    }
+
+    private void assertParcelingIsLossless(IpSecConfig ci) throws Exception {
+        Parcel p = Parcel.obtain();
+        ci.writeToParcel(p, 0);
+        p.setDataPosition(0);
+        IpSecConfig co = IpSecConfig.CREATOR.createFromParcel(p);
+        assertTrue(IpSecConfig.equals(co, ci));
+    }
+}