Allow to set the network used for an update attempt.
When triggering an update attempt in Android, we can force all the
traffic to go through a given network by passing a NETWORK_ID=<id>
in the extra key-value pair field.
Bug: 29921093
TEST=Called update_engine_client passing NETWORK_ID.
Change-Id: I13becdd133cccc912b542d48061fcfe9f566099a
diff --git a/network_selector.h b/network_selector.h
new file mode 100644
index 0000000..22aed8e
--- /dev/null
+++ b/network_selector.h
@@ -0,0 +1,33 @@
+//
+// Copyright (C) 2016 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.
+//
+
+#ifndef UPDATE_ENGINE_NETWORK_SELECTOR_H_
+#define UPDATE_ENGINE_NETWORK_SELECTOR_H_
+
+#include <memory>
+
+#include "update_engine/network_selector_interface.h"
+
+namespace chromeos_update_engine {
+namespace network {
+
+// Creates the NetworkSelectorInterface instance for the given platform.
+std::unique_ptr<NetworkSelectorInterface> CreateNetworkSelector();
+
+} // namespace network
+} // namespace chromeos_update_engine
+
+#endif // UPDATE_ENGINE_NETWORK_SELECTOR_H_
