Default implementation for CAN bus HAL
This implementation supports SocketCAN interfaces.
Bug: 135918744
Test: VTS (separate new change)
Change-Id: I12b93e37fa64e341bee2c64eaf130b39977fcef5
diff --git a/automotive/can/1.0/default/libnetdevice/common.h b/automotive/can/1.0/default/libnetdevice/common.h
new file mode 100644
index 0000000..9bdff4d
--- /dev/null
+++ b/automotive/can/1.0/default/libnetdevice/common.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#pragma once
+
+#include <string>
+
+namespace android {
+namespace netdevice {
+
+/**
+ * Returns the index of a given network interface.
+ *
+ * If the syscall to check the index fails with other error than ENODEV, it gets logged and the
+ * return value indicates the interface doesn't exists.
+ *
+ * \param ifname Interface to check
+ * \return Interface index, or 0 if the interface doesn't exist
+ */
+unsigned int nametoindex(const std::string& ifname);
+
+} // namespace netdevice
+} // namespace android