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diff --git a/src/plugins/hs_apps/proxy.h b/src/plugins/hs_apps/proxy.h
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+
+/*
+ * builtin_proxy.h - skeleton vpp engine plug-in header file
+ *
+ * Copyright (c) 2017-2019 Cisco and/or its affiliates.
+ * 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 __included_proxy_h__
+#define __included_proxy_h__
+
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+
+#include <vppinfra/hash.h>
+#include <vppinfra/error.h>
+#include <vnet/session/session.h>
+#include <vnet/session/application_interface.h>
+
+typedef struct
+{
+  svm_fifo_t *server_rx_fifo;
+  svm_fifo_t *server_tx_fifo;
+
+  u64 vpp_server_handle;
+  u64 vpp_active_open_handle;
+} proxy_session_t;
+
+typedef struct
+{
+  svm_queue_t *vl_input_queue;	/**< vpe input queue */
+  /** per-thread vectors */
+  svm_msg_q_t **server_event_queue;
+  svm_msg_q_t **active_open_event_queue;
+  u8 **rx_buf;				/**< intermediate rx buffers */
+
+  u32 cli_node_index;			/**< cli process node index */
+  u32 server_client_index;		/**< server API client handle */
+  u32 server_app_index;			/**< server app index */
+  u32 active_open_client_index;		/**< active open API client handle */
+  u32 active_open_app_index;		/**< active open index after attach */
+
+  uword *proxy_session_by_server_handle;
+  uword *proxy_session_by_active_open_handle;
+
+  /*
+   * Configuration params
+   */
+  u8 *connect_uri;			/**< URI for slave's connect */
+  u32 configured_segment_size;
+  u32 fifo_size;
+  u32 private_segment_count;		/**< Number of private fifo segs */
+  u32 private_segment_size;		/**< size of private fifo segs */
+  int rcv_buffer_size;
+  u8 *server_uri;
+  u8 *client_uri;
+
+  /*
+   * Test state variables
+   */
+  proxy_session_t *sessions;		/**< Session pool, shared */
+  clib_spinlock_t sessions_lock;
+  u32 **connection_index_by_thread;
+  pthread_t client_thread_handle;
+
+  /*
+   * Flags
+   */
+  u8 is_init;
+  u8 prealloc_fifos;		/**< Request fifo preallocation */
+} proxy_main_t;
+
+extern proxy_main_t proxy_main;
+
+#endif /* __included_proxy_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */