hotspot2: anqp: add parsing support OSU Providers List ANQP element

Bug: 38351209
Test: frameworks/opt/net/wifi/tests/wifitests/runtests.sh
Change-Id: I14f26966b073e44291241bd69c4160b91a47e264

1 files changed, 114 insertions, 0 deletions

diff --git a/tests/wifitests/src/com/android/server/wifi/hotspot2/anqp/HSOsuProvidersElementTest.java b/tests/wifitests/src/com/android/server/wifi/hotspot2/anqp/HSOsuProvidersElementTest.java
new file mode 100644
index 000000000..c4f73871b
--- /dev/null
+++ b/tests/wifitests/src/com/android/server/wifi/hotspot2/anqp/HSOsuProvidersElementTest.java
@@ -0,0 +1,114 @@
+/*
+ * 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 com.android.server.wifi.hotspot2.anqp;
+
+import static org.junit.Assert.assertEquals;
+
+import android.net.wifi.WifiSsid;
+import android.test.suitebuilder.annotation.SmallTest;
+
+import org.junit.Test;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.net.ProtocolException;
+import java.nio.BufferUnderflowException;
+import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Unit tests for {@link com.android.server.wifi.hotspot2.anqp.HSOsuProvidersElement}.
+ */
+@SmallTest
+public class HSOsuProvidersElementTest {
+    private static final byte[] TEST_OSU_SSID_BYTES = "Test SSID".getBytes(StandardCharsets.UTF_8);
+    private static final WifiSsid TEST_OSU_SSID =
+            WifiSsid.createFromByteArray(TEST_OSU_SSID_BYTES);
+    private static final List<OsuProviderInfo> TEST_PROVIDER_LIST =
+            Arrays.asList(OsuProviderInfoTestUtil.TEST_OSU_PROVIDER_INFO);
+
+    private static final HSOsuProvidersElement TEST_OSU_PROVIDERS_ELEMENT =
+            new HSOsuProvidersElement(TEST_OSU_SSID, TEST_PROVIDER_LIST);
+
+    /**
+     * Utility function for generating test data.
+     *
+     * @param osuSsidBytes The OSU SSID bytes
+     * @return byte[]
+     */
+    private static byte[] getTestData(byte[] osuSsidBytes) {
+        try {
+            ByteArrayOutputStream out = new ByteArrayOutputStream();
+            out.write((byte) osuSsidBytes.length);
+            out.write(osuSsidBytes);
+            out.write((byte) TEST_PROVIDER_LIST.size());
+            out.write(OsuProviderInfoTestUtil.TEST_OSU_PROVIDER_INFO_RAW_BYTES);
+            return out.toByteArray();
+        } catch (IOException e) {
+            return null;
+        }
+    }
+
+    /**
+     * Verify that BufferUnderflowException will be thrown when parsing an empty buffer.
+     * @throws Exception
+     */
+    @Test(expected = BufferUnderflowException.class)
+    public void parseEmptyBuffer() throws Exception {
+        HSOsuProvidersElement.parse(ByteBuffer.allocate(0));
+    }
+
+    /**
+     * Verify that BufferUnderflowException will be thrown when parsing a truncated buffer
+     * (missing a byte at the end).
+     *
+     * @throws Exception
+     */
+    @Test(expected = BufferUnderflowException.class)
+    public void parseTruncatedBuffer() throws Exception {
+        ByteBuffer buffer = ByteBuffer.wrap(getTestData(TEST_OSU_SSID_BYTES));
+        buffer.limit(buffer.remaining() - 1);
+        HSOsuProvidersElement.parse(buffer);
+    }
+
+    /**
+     * Verify that ProtocolException will be thrown when parsing a buffer containing an
+     * invalid OSU SSID.
+     *
+     * @throws Exception
+     */
+    @Test(expected = ProtocolException.class)
+    public void parseBufferWithInvalidLength() throws Exception {
+        byte[] invalidSsidBytes = new byte[HSOsuProvidersElement.MAXIMUM_OSU_SSID_LENGTH + 1];
+        ByteBuffer buffer = ByteBuffer.wrap(getTestData(invalidSsidBytes));
+        HSOsuProvidersElement.parse(buffer);
+    }
+
+    /**
+     * Verify that an expected {@link HSOsuProvidersElement} will be returned when parsing a buffer
+     * containing pre-defined test data.
+     *
+     * @throws Exception
+     */
+    @Test
+    public void parseBufferWithTestData() throws Exception {
+        ByteBuffer buffer = ByteBuffer.wrap(getTestData(TEST_OSU_SSID_BYTES));
+        assertEquals(TEST_OSU_PROVIDERS_ELEMENT, HSOsuProvidersElement.parse(buffer));
+    }
+}