Provide a easy way to access bpf maps from java
A wrapper for bpf map opening, reading/writing, and iteration.
Bug: 173167302
Test: atest BpfMapTest
Change-Id: I792b41978b322c9e4969cd7b6c35d6978ab86bc4
diff --git a/Tethering/jni/onload.cpp b/Tethering/jni/onload.cpp
new file mode 100644
index 0000000..3766de9
--- /dev/null
+++ b/Tethering/jni/onload.cpp
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2020 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.
+ */
+
+#include <nativehelper/JNIHelp.h>
+#include "jni.h"
+
+#define LOG_TAG "TetheringJni"
+#include <android/log.h>
+
+namespace android {
+
+int register_android_net_util_TetheringUtils(JNIEnv* env);
+int register_com_android_networkstack_tethering_BpfMap(JNIEnv* env);
+
+extern "C" jint JNI_OnLoad(JavaVM* vm, void*) {
+ JNIEnv *env;
+ if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK) {
+ __android_log_print(ANDROID_LOG_FATAL, LOG_TAG, "ERROR: GetEnv failed");
+ return JNI_ERR;
+ }
+
+ if (register_android_net_util_TetheringUtils(env) < 0) return JNI_ERR;
+
+ if (register_com_android_networkstack_tethering_BpfMap(env) < 0) return JNI_ERR;
+
+ return JNI_VERSION_1_6;
+}
+
+}; // namespace android