upload android base code part6

android/system/netd/tests/tun_interface.h

@@ -0,0 +1,48 @@
+/*
+ * Copyright 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.
+ *
+ * tun_interface.h - creates tun interfaces for testing purposes
+ */
+
+#ifndef _SYSTEM_NETD_TESTS_TUN_INTERACE_H
+#define _SYSTEM_NETD_TESTS_TUN_INTERACE_H
+
+namespace android {
+namespace net {
+
+class TunInterface {
+public:
+    TunInterface() = default;
+    ~TunInterface() { destroy(); }
+
+    // Creates a tun interface. Returns 0 on success or -errno on failure. Must succeed before it is
+    // legal to call any of the other methods in this class.
+    int init();
+    void destroy();
+
+    const std::string& name() const { return mIfName; }
+    const in6_addr& srcAddr() const { return mSrcAddr; }
+    const in6_addr& dstAddr() const { return mDstAddr; }
+
+private:
+    int mFd = -1;
+    std::string mIfName;
+    in6_addr mSrcAddr, mDstAddr;
+};
+
+}  // namespace net
+}  // namespace android
+
+#endif