--- /dev/null
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * 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 GRPC_IMPL_CODEGEN_CONNECTIVITY_STATE_H
+#define GRPC_IMPL_CODEGEN_CONNECTIVITY_STATE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Connectivity state of a channel. */
+typedef enum {
+ /** channel is idle */
+ GRPC_CHANNEL_IDLE,
+ /** channel is connecting */
+ GRPC_CHANNEL_CONNECTING,
+ /** channel is ready for work */
+ GRPC_CHANNEL_READY,
+ /** channel has seen a failure but expects to recover */
+ GRPC_CHANNEL_TRANSIENT_FAILURE,
+ /** channel has seen a failure that it cannot recover from */
+ GRPC_CHANNEL_SHUTDOWN
+} grpc_connectivity_state;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_CONNECTIVITY_STATE_H */