Audio VTS: Enforce policy configuration format
Validate the audio_policy_configuration.xml supplied in /vendor against
the format schema.
Test: Run the VTS test on target
Test: vts-tradefed run commandAndExit vts --skip-all-system-status-check --primary-abi-only --skip-preconditions --module VtsHalAudioV2_0Target -t CheckConfig.audioPolicyConfigurationValidation
Bug: 35700978
Change-Id: I800e692a6ff4f64655007c33af7e34d879ee1132
Signed-off-by: Kevin Rocard <krocard@google.com>
diff --git a/audio/2.0/vts/functional/utility/ValidateXml.cpp b/audio/2.0/vts/functional/utility/ValidateXml.cpp
new file mode 100644
index 0000000..2fb828e
--- /dev/null
+++ b/audio/2.0/vts/functional/utility/ValidateXml.cpp
@@ -0,0 +1,131 @@
+/*
+ * 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.
+ */
+
+#define LOG_TAG "ValidateAudioConfig"
+#include <utils/Log.h>
+
+#define LIBXML_SCHEMAS_ENABLED
+#include <libxml/xmlschemastypes.h>
+#define LIBXML_XINCLUDE_ENABLED
+#include <libxml/xinclude.h>
+
+#include <memory>
+#include <string>
+
+#include "ValidateXml.h"
+
+namespace android {
+namespace hardware {
+namespace audio {
+namespace test {
+
+/** Map libxml2 structures to their corresponding deleters. */
+template <class T>
+constexpr void (*xmlDeleter)(T* t);
+template <>
+constexpr auto xmlDeleter<xmlSchema> = xmlSchemaFree;
+template <>
+constexpr auto xmlDeleter<xmlDoc> = xmlFreeDoc;
+template <>
+constexpr auto xmlDeleter<xmlSchemaParserCtxt> = xmlSchemaFreeParserCtxt;
+template <>
+constexpr auto xmlDeleter<xmlSchemaValidCtxt> = xmlSchemaFreeValidCtxt;
+
+/** @return a unique_ptr with the correct deleter for the libxml2 object. */
+template <class T>
+constexpr auto make_xmlUnique(T* t) {
+ // Wrap deleter in lambda to enable empty base optimization
+ auto deleter = [](T* t) { xmlDeleter<T>(t); };
+ return std::unique_ptr<T, decltype(deleter)>{t, deleter};
+}
+
+/** Class that handles libxml2 initialization and cleanup. NOT THREAD SAFE*/
+struct Libxml2Global {
+ Libxml2Global() {
+ xmlLineNumbersDefault(1); // Better error message
+ xmlSetGenericErrorFunc(this, errorCb);
+ }
+ ~Libxml2Global() {
+ // TODO: check if all those cleanup are needed
+ xmlSetGenericErrorFunc(nullptr, nullptr);
+ xmlSchemaCleanupTypes();
+ xmlCleanupParser();
+ xmlCleanupThreads();
+ }
+
+ const std::string& getErrors() { return errors; }
+
+ private:
+ static void errorCb(void* ctxt, const char* msg, ...) {
+ auto* self = static_cast<Libxml2Global*>(ctxt);
+ va_list args;
+ va_start(args, msg);
+
+ char* formatedMsg;
+ if (vasprintf(&formatedMsg, msg, args) >= 0) {
+ LOG_PRI(ANDROID_LOG_ERROR, LOG_TAG, "%s", formatedMsg);
+ self->errors += "Error: ";
+ self->errors += formatedMsg;
+ }
+ free(formatedMsg);
+
+ va_end(args);
+ }
+ std::string errors;
+};
+
+::testing::AssertionResult validateXml(const char* xmlFilePathExpr, const char* xsdFilePathExpr,
+ const char* xmlFilePath, const char* xsdFilePath) {
+ Libxml2Global libxml2;
+
+ auto context = [&]() {
+ return std::string() + " While validating: " + xmlFilePathExpr +
+ "\n Which is: " + xmlFilePath + "\nAgainst the schema: " + xsdFilePathExpr +
+ "\n Which is: " + xsdFilePath + "Libxml2 errors\n" + libxml2.getErrors();
+ };
+
+ auto schemaParserCtxt = make_xmlUnique(xmlSchemaNewParserCtxt(xsdFilePath));
+ auto schema = make_xmlUnique(xmlSchemaParse(schemaParserCtxt.get()));
+ if (schema == nullptr) {
+ return ::testing::AssertionFailure() << "Failed to parse schema (xsd)\n" << context();
+ }
+
+ auto doc = make_xmlUnique(xmlReadFile(xmlFilePath, nullptr, 0));
+ if (doc == nullptr) {
+ return ::testing::AssertionFailure() << "Failed to parse xml\n" << context();
+ }
+
+ if (xmlXIncludeProcess(doc.get()) == -1) {
+ return ::testing::AssertionFailure() << "Failed to resolve xincludes in xml\n" << context();
+ }
+
+ auto schemaCtxt = make_xmlUnique(xmlSchemaNewValidCtxt(schema.get()));
+ int ret = xmlSchemaValidateDoc(schemaCtxt.get(), doc.get());
+ if (ret > 0) {
+ return ::testing::AssertionFailure() << "xml is not valid according to the xsd.\n"
+ << context();
+ }
+ if (ret < 0) {
+ return ::testing::AssertionFailure() << "Internal or API error\n" << context();
+ }
+
+ return ::testing::AssertionSuccess();
+}
+
+} // namespace test
+} // namespace audio
+} // namespace hardware
+} // namespace android