Implement creating VLAN interfaces
Also, minor improvements for TCU:
- added existsAndIsUp convenience function
- added useCanSockets configuration flag
Bug: 156783614
Test: manual
Change-Id: Ia3d48655067792b712519e25ed48ae0cb657347b
diff --git a/automotive/can/1.0/default/libnetdevice/vlan.cpp b/automotive/can/1.0/default/libnetdevice/vlan.cpp
new file mode 100644
index 0000000..82ef0d9
--- /dev/null
+++ b/automotive/can/1.0/default/libnetdevice/vlan.cpp
@@ -0,0 +1,52 @@
+/*
+ * 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 <libnetdevice/vlan.h>
+
+#include "NetlinkRequest.h"
+#include "NetlinkSocket.h"
+#include "common.h"
+
+#include <android-base/logging.h>
+
+namespace android::netdevice::vlan {
+
+bool add(const std::string& eth, const std::string& vlan, uint16_t id) {
+ const auto ethidx = nametoindex(eth);
+ if (ethidx == 0) {
+ LOG(ERROR) << "Ethernet interface " << eth << " doesn't exist";
+ return false;
+ }
+
+ NetlinkRequest<struct ifinfomsg> req(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
+ req.addattr(IFLA_IFNAME, vlan);
+ req.addattr<uint32_t>(IFLA_LINK, ethidx);
+
+ {
+ auto linkinfo = req.nest(IFLA_LINKINFO);
+ req.addattr(IFLA_INFO_KIND, "vlan");
+
+ {
+ auto linkinfo = req.nest(IFLA_INFO_DATA);
+ req.addattr(IFLA_VLAN_ID, id);
+ }
+ }
+
+ NetlinkSocket sock(NETLINK_ROUTE);
+ return sock.send(req) && sock.receiveAck();
+}
+
+} // namespace android::netdevice::vlan