Create the timerfd helper class
Create a helper class in Java to provide easy access to timerfd
JNI methods.
Bug: 366373064
Test: atest NetworkStaticLibTests
Change-Id: Iea09cd29e2a6ed837ece30c512393be2e27e8c2e
diff --git a/service/Android.bp b/service/Android.bp
index 567c079..fd3d4a3 100644
--- a/service/Android.bp
+++ b/service/Android.bp
@@ -90,7 +90,6 @@
static_libs: [
"libnet_utils_device_common_bpfjni",
"libnet_utils_device_common_bpfutils",
- "libnet_utils_device_common_timerfdjni",
],
shared_libs: [
"liblog",
@@ -126,6 +125,7 @@
"libmodules-utils-build",
"libnetjniutils",
"libnet_utils_device_common_bpfjni",
+ "libnet_utils_device_common_timerfdjni",
"netd_aidl_interface-lateststable-ndk",
],
shared_libs: [
diff --git a/service/jni/onload.cpp b/service/jni/onload.cpp
index bb70d4f..8e01260 100644
--- a/service/jni/onload.cpp
+++ b/service/jni/onload.cpp
@@ -26,6 +26,8 @@
int register_android_server_net_NetworkStatsFactory(JNIEnv* env);
int register_android_server_net_NetworkStatsService(JNIEnv* env);
int register_com_android_server_ServiceManagerWrapper(JNIEnv* env);
+int register_com_android_net_module_util_TimerFdUtils(JNIEnv *env,
+ char const *class_name);
extern "C" jint JNI_OnLoad(JavaVM* vm, void*) {
JNIEnv *env;
@@ -56,6 +58,12 @@
}
}
+ if (register_com_android_net_module_util_TimerFdUtils(
+ env, "android/net/connectivity/com/android/net/module/util/"
+ "TimerFdUtils") < 0) {
+ return JNI_ERR;
+ }
+
return JNI_VERSION_1_6;
}
diff --git a/staticlibs/Android.bp b/staticlibs/Android.bp
index a825b87..b5ee789 100644
--- a/staticlibs/Android.bp
+++ b/staticlibs/Android.bp
@@ -32,6 +32,8 @@
default_applicable_licenses: ["Android-Apache-2.0"],
}
+// This library shouldn't be used anymore (no class should be added), and per-user libraries like
+// net-utils-service-connectivity or net-utils-framework-wifi should be used instead.
java_library {
name: "net-utils-device-common",
srcs: [
diff --git a/staticlibs/device/com/android/net/module/util/TimerFdUtils.java b/staticlibs/device/com/android/net/module/util/TimerFdUtils.java
new file mode 100644
index 0000000..310dbc9
--- /dev/null
+++ b/staticlibs/device/com/android/net/module/util/TimerFdUtils.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2024 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.net.module.util;
+
+import android.os.Process;
+import android.util.Log;
+
+import java.io.IOException;
+
+/**
+ * Contains mostly timerfd functionality.
+ */
+public class TimerFdUtils {
+ static {
+ if (Process.myUid() == Process.SYSTEM_UID) {
+ // This library is part of service-connectivity.jar when in the system server,
+ // so libservice-connectivity.so is the library to load.
+ System.loadLibrary("service-connectivity");
+ } else {
+ System.loadLibrary(JniUtil.getJniLibraryName(TimerFdUtils.class.getPackage()));
+ }
+ }
+
+ private static final String TAG = TimerFdUtils.class.getSimpleName();
+
+ /**
+ * Create a timerfd.
+ *
+ * @throws IOException if the timerfd creation is failed.
+ */
+ private static native int createTimerFd() throws IOException;
+
+ /**
+ * Set given time to the timerfd.
+ *
+ * @param timeMs target time
+ * @throws IOException if setting expiration time is failed.
+ */
+ private static native void setTime(int fd, long timeMs) throws IOException;
+
+ /**
+ * Create a timerfd
+ */
+ static int createTimerFileDescriptor() {
+ try {
+ return createTimerFd();
+ } catch (IOException e) {
+ Log.e(TAG, "createTimerFd failed", e);
+ return -1;
+ }
+ }
+
+ /**
+ * Set expiration time to timerfd
+ */
+ static boolean setExpirationTime(int id, long expirationTimeMs) {
+ try {
+ setTime(id, expirationTimeMs);
+ } catch (IOException e) {
+ Log.e(TAG, "setExpirationTime failed", e);
+ return false;
+ }
+ return true;
+ }
+}
diff --git a/tests/unit/jni/android_net_frameworktests_util/onload.cpp b/tests/unit/jni/android_net_frameworktests_util/onload.cpp
index 06a3986..a0ce4f8 100644
--- a/tests/unit/jni/android_net_frameworktests_util/onload.cpp
+++ b/tests/unit/jni/android_net_frameworktests_util/onload.cpp
@@ -24,6 +24,8 @@
int register_com_android_net_module_util_BpfMap(JNIEnv* env, char const* class_name);
int register_com_android_net_module_util_TcUtils(JNIEnv* env, char const* class_name);
+int register_com_android_net_module_util_TimerFdUtils(JNIEnv *env,
+ char const *class_name);
extern "C" jint JNI_OnLoad(JavaVM* vm, void*) {
JNIEnv *env;
@@ -38,6 +40,10 @@
if (register_com_android_net_module_util_TcUtils(env,
"android/net/frameworktests/util/TcUtils") < 0) return JNI_ERR;
+ if (register_com_android_net_module_util_TimerFdUtils(
+ env, "android/net/frameworktests/util/TimerFdUtils") < 0)
+ return JNI_ERR;
+
return JNI_VERSION_1_6;
}