api: refactor vlibmemory

- separate client/server code for both memory and socket apis
- separate memory api code from generic vlib api code
- move unix_shared_memory_fifo to svm and rename to svm_fifo_t
- overall declutter

Change-Id: I90cdd98ff74d0787d58825b914b0f1eafcfa4dc2
Signed-off-by: Florin Coras <fcoras@cisco.com>

17 files changed, 3400 insertions, 3718 deletions

diff --git a/src/vlibmemory/api.h b/src/vlibmemory/api.h
index 5c32f5308de..4f869a64be3 100644
--- a/src/vlibmemory/api.h
+++ b/src/vlibmemory/api.h
@@ -1,7 +1,5 @@
 /*
  *------------------------------------------------------------------
- * api.h
- *
  * Copyright (c) 2009 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.
@@ -17,41 +15,85 @@
  *------------------------------------------------------------------
  */
 
-#ifndef included_vlibmemory_api_h
-#define included_vlibmemory_api_h
+#ifndef included_vlibmemory_api_common_h
+#define included_vlibmemory_api_common_h
 
-#include <svm/svm.h>
-#include <vlib/vlib.h>
-#include <vlibmemory/unix_shared_memory_queue.h>
-#include <vlib/unix/unix.h>
+#include <svm/svm_common.h>
 #include <vlibapi/api.h>
-#include <vlibmemory/api_common.h>
+#include <vlibmemory/memory_api.h>
+#include <vlibmemory/memory_client.h>
+#include <vlibmemory/socket_api.h>
+#include <vlibmemory/socket_client.h>
+
+void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
+u16 vl_client_get_first_plugin_msg_id (const char *plugin_name);
+void vl_api_send_pending_rpc_requests (vlib_main_t * vm);
+u8 *vl_api_serialize_message_table (api_main_t * am, u8 * vector);
 
-static inline u32
-vl_msg_api_handle_get_epoch (u32 index)
+always_inline void
+vl_api_send_msg (vl_api_registration_t * rp, u8 * elem)
 {
-  return (index & VL_API_EPOCH_MASK);
+  if (PREDICT_FALSE (rp->registration_type > REGISTRATION_TYPE_SHMEM))
+    {
+      vl_socket_api_send (rp, elem);
+    }
+  else
+    {
+      vl_msg_api_send_shmem (rp->vl_input_queue, (u8 *) & elem);
+    }
 }
 
-static inline u32
-vl_msg_api_handle_get_index (u32 index)
+always_inline vl_api_registration_t *
+vl_api_client_index_to_registration (u32 index)
 {
-  return (index >> VL_API_EPOCH_SHIFT);
+  if (PREDICT_FALSE (socket_main.current_rp != 0))
+    return socket_main.current_rp;
+
+  return (vl_mem_api_client_index_to_registration (index));
 }
 
-static inline u32
-vl_msg_api_handle_from_index_and_epoch (u32 index, u32 epoch)
+/*
+ * vl_api_clnt process data used by transports (socket api in particular)
+ */
+extern vlib_node_registration_t vl_api_clnt_node;
+extern volatile int **vl_api_queue_cursizes;
+
+typedef enum vl_api_clnt_process_events
 {
-  u32 handle;
-  ASSERT (index < 0x00FFFFFF);
+  QUEUE_SIGNAL_EVENT = 1,
+  SOCKET_READ_EVENT
+} vl_api_clnt_process_events_t;
 
-  handle = (index << VL_API_EPOCH_SHIFT) | (epoch & VL_API_EPOCH_MASK);
-  return handle;
-}
+#define foreach_histogram_bucket                \
+_(400)                                          \
+_(200)                                          \
+_(100)                                          \
+_(10)
+
+typedef enum
+{
+#define _(n) SLEEP_##n##_US,
+  foreach_histogram_bucket
+#undef _
+    SLEEP_N_BUCKETS,
+} histogram_index_t;
 
-void vl_enable_disable_memory_api (vlib_main_t * vm, int yesno);
+extern u64 vector_rate_histogram[];
+
+/*
+ * sockclnt APIs XXX are these actually used anywhere?
+ */
+vl_api_registration_t *sockclnt_get_registration (u32 index);
+void socksvr_add_pending_output (struct clib_file *uf,
+				 struct vl_api_registration_ *cf,
+				 u8 * buffer, uword buffer_bytes);
+void vl_socket_process_msg (struct clib_file *uf,
+			    struct vl_api_registration_ *rp, i8 * input_v);
+u32 sockclnt_open_index (char *client_name, char *hostname, int port);
+void sockclnt_close_index (u32 index);
+void vl_client_msg_api_send (vl_api_registration_t * cm, u8 * elem);
 
-#endif /* included_vlibmemory_api_h */
+#endif /* included_vlibmemory_api_common_h */
 
 /*
  * fd.io coding-style-patch-verification: ON
diff --git a/src/vlibmemory/api_common.h b/src/vlibmemory/api_common.h
deleted file mode 100644
index bd0da10d569..00000000000
--- a/src/vlibmemory/api_common.h
+++ /dev/null
@@ -1,267 +0,0 @@
-/*
- *------------------------------------------------------------------
- * Copyright (c) 2009 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_vlibmemory_api_common_h
-#define included_vlibmemory_api_common_h
-
-#include <svm/svm_common.h>
-#include <vppinfra/file.h>
-#include <vlibapi/api_common.h>
-#include <vlibmemory/unix_shared_memory_queue.h>
-
-/* Allocated in shared memory */
-
-/*
- * Ring-allocation scheme for client API messages
- *
- * Only one proc/thread has control of a given message buffer.
- * To free a buffer allocated from one of these rings, we clear
- * a field in the buffer (header), and leave.
- *
- * No locks, no hits, no errors...
- */
-typedef struct ring_alloc_
-{
-  unix_shared_memory_queue_t *rp;
-  u16 size;
-  u16 nitems;
-  u32 hits;
-  u32 misses;
-} ring_alloc_t;
-
-typedef enum
-{
-  VL_API_VLIB_RING,
-  VL_API_CLIENT_RING,
-  VL_API_QUEUE
-} vl_api_shm_config_type_t;
-
-typedef struct vl_api_ring_config_
-{
-  u8 type;
-  u8 _pad;
-  u16 count;
-  u32 size;
-} vl_api_shm_elem_config_t;
-
-STATIC_ASSERT (sizeof (vl_api_shm_elem_config_t) == 8,
-	       "Size must be exactly 8 bytes");
-
-/*
- * Initializers for the (shared-memory) rings
- * _(size, n). Note: each msg has space for a header.
- */
-#define foreach_vl_aring_size                   \
-_(64+sizeof(ring_alloc_t), 1024)                \
-_(256+sizeof(ring_alloc_t), 128)                \
-_(1024+sizeof(ring_alloc_t), 64)
-
-#define foreach_clnt_aring_size                 \
- _(1024+sizeof(ring_alloc_t), 1024)             \
- _(2048+sizeof(ring_alloc_t), 128)              \
- _(4096+sizeof(ring_alloc_t), 8)
-
-typedef struct vl_shmem_hdr_
-{
-  int version;
-
-  /* getpid () for the VLIB client process */
-  volatile int vl_pid;
-
-  /* Client sends VLIB msgs here. */
-  unix_shared_memory_queue_t *vl_input_queue;
-
-  /* Vector of rings; one for each size. */
-
-  /* VLIB allocates buffers to send msgs to clients here. */
-  ring_alloc_t *vl_rings;
-
-  /* Clients allocate buffer to send msgs to VLIB here. */
-  ring_alloc_t *client_rings;
-
-  /* Number of detected application restarts */
-  u32 application_restarts;
-
-  /* Number of messages reclaimed during application restart */
-  u32 restart_reclaims;
-
-  /* Number of garbage-collected messages */
-  u32 garbage_collects;
-} vl_shmem_hdr_t;
-
-#define VL_SHM_VERSION 2
-
-#define VL_API_EPOCH_MASK 0xFF
-#define VL_API_EPOCH_SHIFT 8
-
-void *vl_msg_api_alloc (int nbytes);
-void *vl_msg_api_alloc_or_null (int nbytes);
-void *vl_msg_api_alloc_as_if_client (int nbytes);
-void *vl_msg_api_alloc_as_if_client_or_null (int nbytes);
-void vl_msg_api_free (void *a);
-int vl_map_shmem (const char *region_name, int is_vlib);
-void vl_register_mapped_shmem_region (svm_region_t * rp);
-void vl_unmap_shmem (void);
-void vl_msg_api_send_shmem (unix_shared_memory_queue_t * q, u8 * elem);
-void vl_msg_api_send_shmem_nolock (unix_shared_memory_queue_t * q, u8 * elem);
-void vl_msg_api_send (vl_api_registration_t * rp, u8 * elem);
-int vl_client_connect (const char *name, int ctx_quota, int input_queue_size);
-void vl_client_disconnect (void);
-unix_shared_memory_queue_t *vl_api_client_index_to_input_queue (u32 index);
-vl_api_registration_t *vl_api_client_index_to_registration (u32 index);
-int vl_client_api_map (const char *region_name);
-void vl_client_api_unmap (void);
-void vl_set_memory_region_name (const char *name);
-void vl_set_memory_root_path (const char *root_path);
-void vl_set_memory_uid (int uid);
-void vl_set_memory_gid (int gid);
-void vl_set_global_memory_baseva (u64 baseva);
-void vl_set_global_memory_size (u64 size);
-void vl_set_api_memory_size (u64 size);
-void vl_set_global_pvt_heap_size (u64 size);
-void vl_set_api_pvt_heap_size (u64 size);
-void vl_client_disconnect_from_vlib (void);
-int vl_client_connect_to_vlib (const char *svm_name, const char *client_name,
-			       int rx_queue_size);
-int vl_client_connect_to_vlib_no_rx_pthread (const char *svm_name,
-					     const char *client_name,
-					     int rx_queue_size);
-int vl_client_connect_to_vlib_no_map (const char *svm_name,
-				      const char *client_name,
-				      int rx_queue_size);
-u16 vl_client_get_first_plugin_msg_id (const char *plugin_name);
-
-void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
-u32 vl_api_memclnt_create_internal (char *, unix_shared_memory_queue_t *);
-void vl_init_shmem (svm_region_t * vlib_rp, vl_api_shm_elem_config_t * config,
-		    int is_vlib, int is_private_region);
-void vl_client_install_client_message_handlers (void);
-void vl_api_send_pending_rpc_requests (vlib_main_t * vm);
-
-/* API messages over sockets */
-
-extern vlib_node_registration_t memclnt_node;
-extern volatile int **vl_api_queue_cursizes;
-
-/* Events sent to the memclnt process */
-#define QUEUE_SIGNAL_EVENT 1
-#define SOCKET_READ_EVENT 2
-
-#define API_SOCKET_FILE "/run/vpp-api.sock"
-
-typedef struct
-{
-  clib_file_t *clib_file;
-  vl_api_registration_t *regp;
-  u8 *data;
-} vl_socket_args_for_process_t;
-
-typedef struct
-{
-  /* Server port number */
-  u8 *socket_name;
-
-  /* By default, localhost... */
-  u32 bind_address;
-
-  /*
-   * (listen, server, client) registrations. Shared memory
-   * registrations are in shared memory
-   */
-  vl_api_registration_t *registration_pool;
-  /*
-   * Chain-drag variables, so message API handlers
-   * (generally) don't know whether they're talking to a socket
-   * or to a shared-memory connection.
-   */
-  vl_api_registration_t *current_rp;
-  clib_file_t *current_uf;
-  /* One input buffer, shared across all sockets */
-  i8 *input_buffer;
-
-  /* pool of process args for socket clients */
-  vl_socket_args_for_process_t *process_args;
-
-  /* Listen for API connections here */
-  clib_socket_t socksvr_listen_socket;
-} socket_main_t;
-
-extern socket_main_t socket_main;
-
-typedef struct
-{
-  int socket_fd;
-  /* Temporarily disable the connection, so we can keep it around... */
-  int socket_enable;
-
-  clib_socket_t client_socket;
-
-  u32 socket_buffer_size;
-  u8 *socket_tx_buffer;
-  u8 *socket_rx_buffer;
-  u32 socket_tx_nbytes;
-  int control_pings_outstanding;
-
-  u8 *name;
-  clib_time_t clib_time;
-} socket_client_main_t;
-
-extern socket_client_main_t socket_client_main;
-
-#define SOCKET_CLIENT_DEFAULT_BUFFER_SIZE 4096
-
-void socksvr_add_pending_output (struct clib_file *uf,
-				 struct vl_api_registration_ *cf,
-				 u8 * buffer, uword buffer_bytes);
-
-void vl_free_socket_registration_index (u32 pool_index);
-void vl_socket_process_msg (struct clib_file *uf,
-			    struct vl_api_registration_ *rp, i8 * input_v);
-clib_error_t *vl_socket_read_ready (struct clib_file *uf);
-void vl_socket_add_pending_output (struct clib_file *uf,
-				   struct vl_api_registration_ *rp,
-				   u8 * buffer, uword buffer_bytes);
-void vl_socket_add_pending_output_no_flush (struct clib_file *uf,
-					    struct vl_api_registration_ *rp,
-					    u8 * buffer, uword buffer_bytes);
-clib_error_t *vl_socket_write_ready (struct clib_file *uf);
-void vl_socket_api_send (vl_api_registration_t * rp, u8 * elem);
-u32 sockclnt_open_index (char *client_name, char *hostname, int port);
-void sockclnt_close_index (u32 index);
-void vl_client_msg_api_send (vl_api_registration_t * cm, u8 * elem);
-vl_api_registration_t *sockclnt_get_registration (u32 index);
-void vl_api_socket_process_msg (clib_file_t * uf, vl_api_registration_t * rp,
-				i8 * input_v);
-
-int vl_socket_client_connect (char *socket_path, char *client_name,
-			      u32 socket_buffer_size);
-int vl_socket_client_init_shm (vl_api_shm_elem_config_t * config);
-void vl_socket_client_disconnect (void);
-int vl_socket_client_read (int wait);
-int vl_socket_client_write (void);
-void vl_socket_client_enable_disable (int enable);
-void *vl_socket_client_msg_alloc (int nbytes);
-
-#endif /* included_vlibmemory_api_common_h */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
diff --git a/src/vlibmemory/memory_api.c b/src/vlibmemory/memory_api.c
new file mode 100644
index 00000000000..d049a625015
--- /dev/null
+++ b/src/vlibmemory/memory_api.c
@@ -0,0 +1,905 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2018 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.
+ *------------------------------------------------------------------
+ */
+#include <signal.h>
+
+#include <vlib/vlib.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vlibmemory/memory_api.h>
+
+#include <vlibmemory/vl_memory_msg_enum.h>	/* enumerate all vlib messages */
+
+#define vl_typedefs		/* define message structures */
+#include <vlibmemory/vl_memory_api_h.h>
+#undef vl_typedefs
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+#define vl_printfun
+#include <vlibmemory/vl_memory_api_h.h>
+#undef vl_printfun
+
+/* instantiate all the endian swap functions we know about */
+#define vl_endianfun
+#include <vlibmemory/vl_memory_api_h.h>
+#undef vl_endianfun
+
+static inline void *
+vl_api_memclnt_create_t_print (vl_api_memclnt_create_t * a, void *handle)
+{
+  vl_print (handle, "vl_api_memclnt_create_t:\n");
+  vl_print (handle, "name: %s\n", a->name);
+  vl_print (handle, "input_queue: 0x%wx\n", a->input_queue);
+  vl_print (handle, "context: %u\n", (unsigned) a->context);
+  vl_print (handle, "ctx_quota: %ld\n", (long) a->ctx_quota);
+  return handle;
+}
+
+static inline void *
+vl_api_memclnt_delete_t_print (vl_api_memclnt_delete_t * a, void *handle)
+{
+  vl_print (handle, "vl_api_memclnt_delete_t:\n");
+  vl_print (handle, "index: %u\n", (unsigned) a->index);
+  vl_print (handle, "handle: 0x%wx\n", a->handle);
+  return handle;
+}
+
+volatile int **vl_api_queue_cursizes;
+
+static void
+memclnt_queue_callback (vlib_main_t * vm)
+{
+  int i;
+  api_main_t *am = &api_main;
+
+  if (PREDICT_FALSE (vec_len (vl_api_queue_cursizes) !=
+		     1 + vec_len (am->vlib_private_rps)))
+    {
+      vl_shmem_hdr_t *shmem_hdr = am->shmem_hdr;
+      svm_queue_t *q;
+
+      if (shmem_hdr == 0)
+	return;
+
+      q = shmem_hdr->vl_input_queue;
+      if (q == 0)
+	return;
+
+      vec_add1 (vl_api_queue_cursizes, &q->cursize);
+
+      for (i = 0; i < vec_len (am->vlib_private_rps); i++)
+	{
+	  svm_region_t *vlib_rp = am->vlib_private_rps[i];
+
+	  shmem_hdr = (void *) vlib_rp->user_ctx;
+	  q = shmem_hdr->vl_input_queue;
+	  vec_add1 (vl_api_queue_cursizes, &q->cursize);
+	}
+    }
+
+  for (i = 0; i < vec_len (vl_api_queue_cursizes); i++)
+    {
+      if (*vl_api_queue_cursizes[i])
+	{
+	  vm->queue_signal_pending = 1;
+	  vm->api_queue_nonempty = 1;
+	  vlib_process_signal_event (vm, vl_api_clnt_node.index,
+				     /* event_type */ QUEUE_SIGNAL_EVENT,
+				     /* event_data */ 0);
+	  break;
+	}
+    }
+}
+
+/*
+ * vl_api_memclnt_create_internal
+ */
+u32
+vl_api_memclnt_create_internal (char *name, svm_queue_t * q)
+{
+  vl_api_registration_t **regpp;
+  vl_api_registration_t *regp;
+  svm_region_t *svm;
+  void *oldheap;
+  api_main_t *am = &api_main;
+
+  ASSERT (vlib_get_thread_index () == 0);
+  pool_get (am->vl_clients, regpp);
+
+  svm = am->vlib_rp;
+
+  pthread_mutex_lock (&svm->mutex);
+  oldheap = svm_push_data_heap (svm);
+  *regpp = clib_mem_alloc (sizeof (vl_api_registration_t));
+
+  regp = *regpp;
+  memset (regp, 0, sizeof (*regp));
+  regp->registration_type = REGISTRATION_TYPE_SHMEM;
+  regp->vl_api_registration_pool_index = regpp - am->vl_clients;
+  regp->vlib_rp = svm;
+  regp->shmem_hdr = am->shmem_hdr;
+
+  regp->vl_input_queue = q;
+  regp->name = format (0, "%s%c", name, 0);
+
+  pthread_mutex_unlock (&svm->mutex);
+  svm_pop_heap (oldheap);
+  return vl_msg_api_handle_from_index_and_epoch
+    (regp->vl_api_registration_pool_index,
+     am->shmem_hdr->application_restarts);
+}
+
+/*
+ * vl_api_memclnt_create_t_handler
+ */
+void
+vl_api_memclnt_create_t_handler (vl_api_memclnt_create_t * mp)
+{
+  vl_api_registration_t **regpp;
+  vl_api_registration_t *regp;
+  vl_api_memclnt_create_reply_t *rp;
+  svm_region_t *svm;
+  svm_queue_t *q;
+  int rv = 0;
+  void *oldheap;
+  api_main_t *am = &api_main;
+
+  /*
+   * This is tortured. Maintain a vlib-address-space private
+   * pool of client registrations. We use the shared-memory virtual
+   * address of client structure as a handle, to allow direct
+   * manipulation of context quota vbls from the client library.
+   *
+   * This scheme causes trouble w/ API message trace replay, since
+   * some random VA from clib_mem_alloc() certainly won't
+   * occur in the Linux sim. The (very) few places
+   * that care need to use the pool index.
+   *
+   * Putting the registration object(s) into a pool in shared memory and
+   * using the pool index as a handle seems like a great idea.
+   * Unfortunately, each and every reference to that pool would need
+   * to be protected by a mutex:
+   *
+   *     Client                      VLIB
+   *     ------                      ----
+   *     convert pool index to
+   *     pointer.
+   *     <deschedule>
+   *                                 expand pool
+   *                                 <deschedule>
+   *     kaboom!
+   */
+
+  pool_get (am->vl_clients, regpp);
+
+  svm = am->vlib_rp;
+
+  pthread_mutex_lock (&svm->mutex);
+  oldheap = svm_push_data_heap (svm);
+  *regpp = clib_mem_alloc (sizeof (vl_api_registration_t));
+
+  regp = *regpp;
+  memset (regp, 0, sizeof (*regp));
+  regp->registration_type = REGISTRATION_TYPE_SHMEM;
+  regp->vl_api_registration_pool_index = regpp - am->vl_clients;
+  regp->vlib_rp = svm;
+  regp->shmem_hdr = am->shmem_hdr;
+
+  q = regp->vl_input_queue = (svm_queue_t *) (uword) mp->input_queue;
+
+  regp->name = format (0, "%s", mp->name);
+  vec_add1 (regp->name, 0);
+
+  if (am->serialized_message_table_in_shmem == 0)
+    am->serialized_message_table_in_shmem =
+      vl_api_serialize_message_table (am, 0);
+
+  pthread_mutex_unlock (&svm->mutex);
+  svm_pop_heap (oldheap);
+
+  rp = vl_msg_api_alloc (sizeof (*rp));
+  rp->_vl_msg_id = ntohs (VL_API_MEMCLNT_CREATE_REPLY);
+  rp->handle = (uword) regp;
+  rp->index = vl_msg_api_handle_from_index_and_epoch
+    (regp->vl_api_registration_pool_index,
+     am->shmem_hdr->application_restarts);
+  rp->context = mp->context;
+  rp->response = ntohl (rv);
+  rp->message_table =
+    pointer_to_uword (am->serialized_message_table_in_shmem);
+
+  vl_msg_api_send_shmem (q, (u8 *) & rp);
+}
+
+int
+vl_api_call_reaper_functions (u32 client_index)
+{
+  clib_error_t *error = 0;
+  _vl_msg_api_function_list_elt_t *i;
+
+  i = api_main.reaper_function_registrations;
+  while (i)
+    {
+      error = i->f (client_index);
+      if (error)
+	clib_error_report (error);
+      i = i->next_init_function;
+    }
+  return 0;
+}
+
+/*
+ * vl_api_memclnt_delete_t_handler
+ */
+void
+vl_api_memclnt_delete_t_handler (vl_api_memclnt_delete_t * mp)
+{
+  vl_api_registration_t **regpp;
+  vl_api_registration_t *regp;
+  vl_api_memclnt_delete_reply_t *rp;
+  svm_region_t *svm;
+  void *oldheap;
+  api_main_t *am = &api_main;
+  u32 handle, client_index, epoch;
+
+  handle = mp->index;
+
+  if (vl_api_call_reaper_functions (handle))
+    return;
+
+  epoch = vl_msg_api_handle_get_epoch (handle);
+  client_index = vl_msg_api_handle_get_index (handle);
+
+  if (epoch != (am->shmem_hdr->application_restarts & VL_API_EPOCH_MASK))
+    {
+      clib_warning
+	("Stale clnt delete index %d old epoch %d cur epoch %d",
+	 client_index, epoch,
+	 (am->shmem_hdr->application_restarts & VL_API_EPOCH_MASK));
+      return;
+    }
+
+  regpp = am->vl_clients + client_index;
+
+  if (!pool_is_free (am->vl_clients, regpp))
+    {
+      int i;
+      regp = *regpp;
+      svm = am->vlib_rp;
+      int private_registration = 0;
+
+      /*
+       * Note: the API message handling path will set am->vlib_rp
+       * as appropriate for pairwise / private memory segments
+       */
+      rp = vl_msg_api_alloc (sizeof (*rp));
+      rp->_vl_msg_id = ntohs (VL_API_MEMCLNT_DELETE_REPLY);
+      rp->handle = mp->handle;
+      rp->response = 1;
+
+      vl_msg_api_send_shmem (regp->vl_input_queue, (u8 *) & rp);
+
+      if (client_index != regp->vl_api_registration_pool_index)
+	{
+	  clib_warning ("mismatch client_index %d pool_index %d",
+			client_index, regp->vl_api_registration_pool_index);
+	  vl_msg_api_free (rp);
+	  return;
+	}
+
+      /* For horizontal scaling, add a hash table... */
+      for (i = 0; i < vec_len (am->vlib_private_rps); i++)
+	{
+	  /* Is this a pairwise / private API segment? */
+	  if (am->vlib_private_rps[i] == svm)
+	    {
+	      /* Note: account for the memfd header page */
+	      u64 virtual_base = svm->virtual_base - MMAP_PAGESIZE;
+	      u64 virtual_size = svm->virtual_size + MMAP_PAGESIZE;
+
+	      /*
+	       * Kill the registration pool element before we make
+	       * the index vanish forever
+	       */
+	      pool_put_index (am->vl_clients,
+			      regp->vl_api_registration_pool_index);
+
+	      vec_delete (am->vlib_private_rps, 1, i);
+	      /* Kill it, accounting for the memfd header page */
+	      if (munmap ((void *) virtual_base, virtual_size) < 0)
+		clib_unix_warning ("munmap");
+	      /* Reset the queue-length-address cache */
+	      vec_reset_length (vl_api_queue_cursizes);
+	      private_registration = 1;
+	      break;
+	    }
+	}
+
+      /* No dangling references, please */
+      *regpp = 0;
+
+      if (private_registration == 0)
+	{
+	  pool_put_index (am->vl_clients,
+			  regp->vl_api_registration_pool_index);
+	  pthread_mutex_lock (&svm->mutex);
+	  oldheap = svm_push_data_heap (svm);
+	  /* Poison the old registration */
+	  memset (regp, 0xF1, sizeof (*regp));
+	  clib_mem_free (regp);
+	  pthread_mutex_unlock (&svm->mutex);
+	  svm_pop_heap (oldheap);
+	  /*
+	   * These messages must be freed manually, since they're set up
+	   * as "bounce" messages. In the private_registration == 1 case,
+	   * we kill the shared-memory segment which contains the message
+	   * with munmap.
+	   */
+	  vl_msg_api_free (mp);
+	}
+    }
+  else
+    {
+      clib_warning ("unknown client ID %d", mp->index);
+    }
+}
+
+/**
+ * client answered a ping, stave off the grim reaper...
+ */
+void
+  vl_api_memclnt_keepalive_reply_t_handler
+  (vl_api_memclnt_keepalive_reply_t * mp)
+{
+  vl_api_registration_t *regp;
+  vlib_main_t *vm = vlib_get_main ();
+
+  regp = vl_api_client_index_to_registration (mp->context);
+  if (regp)
+    {
+      regp->last_heard = vlib_time_now (vm);
+      regp->unanswered_pings = 0;
+    }
+  else
+    clib_warning ("BUG: anonymous memclnt_keepalive_reply");
+}
+
+/**
+ * We can send ourselves these messages if someone uses the
+ * builtin binary api test tool...
+ */
+static void
+vl_api_memclnt_keepalive_t_handler (vl_api_memclnt_keepalive_t * mp)
+{
+  vl_api_memclnt_keepalive_reply_t *rmp;
+  api_main_t *am;
+  vl_shmem_hdr_t *shmem_hdr;
+
+  am = &api_main;
+  shmem_hdr = am->shmem_hdr;
+
+  rmp = vl_msg_api_alloc_as_if_client (sizeof (*rmp));
+  memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_MEMCLNT_KEEPALIVE_REPLY);
+  rmp->context = mp->context;
+  vl_msg_api_send_shmem (shmem_hdr->vl_input_queue, (u8 *) & rmp);
+}
+
+#define foreach_vlib_api_msg                            \
+_(MEMCLNT_CREATE, memclnt_create)                       \
+_(MEMCLNT_DELETE, memclnt_delete)                       \
+_(MEMCLNT_KEEPALIVE, memclnt_keepalive)                 \
+_(MEMCLNT_KEEPALIVE_REPLY, memclnt_keepalive_reply)	\
+
+/*
+ * memory_api_init
+ */
+int
+vl_mem_api_init (const char *region_name)
+{
+  int rv;
+  api_main_t *am = &api_main;
+  vl_msg_api_msg_config_t cfg;
+  vl_msg_api_msg_config_t *c = &cfg;
+  vl_shmem_hdr_t *shm;
+  vlib_main_t *vm = vlib_get_main ();
+
+  memset (c, 0, sizeof (*c));
+
+  if ((rv = vl_map_shmem (region_name, 1 /* is_vlib */ )) < 0)
+    return rv;
+
+#define _(N,n) do {                                             \
+    c->id = VL_API_##N;                                         \
+    c->name = #n;                                               \
+    c->handler = vl_api_##n##_t_handler;                        \
+    c->cleanup = vl_noop_handler;                               \
+    c->endian = vl_api_##n##_t_endian;                          \
+    c->print = vl_api_##n##_t_print;                            \
+    c->size = sizeof(vl_api_##n##_t);                           \
+    c->traced = 1; /* trace, so these msgs print */             \
+    c->replay = 0; /* don't replay client create/delete msgs */ \
+    c->message_bounce = 0; /* don't bounce this message */	\
+    vl_msg_api_config(c);} while (0);
+
+  foreach_vlib_api_msg;
+#undef _
+
+  /*
+   * special-case freeing of memclnt_delete messages, so we can
+   * simply munmap pairwise / private API segments...
+   */
+  am->message_bounce[VL_API_MEMCLNT_DELETE] = 1;
+  am->is_mp_safe[VL_API_MEMCLNT_KEEPALIVE_REPLY] = 1;
+
+  vlib_set_queue_signal_callback (vm, memclnt_queue_callback);
+
+  shm = am->shmem_hdr;
+  ASSERT (shm && shm->vl_input_queue);
+
+  /* Make a note so we can always find the primary region easily */
+  am->vlib_primary_rp = am->vlib_rp;
+
+  return 0;
+}
+
+static void
+send_memclnt_keepalive (vl_api_registration_t * regp, f64 now)
+{
+  vl_api_memclnt_keepalive_t *mp;
+  svm_queue_t *q;
+  api_main_t *am = &api_main;
+  svm_region_t *save_vlib_rp = am->vlib_rp;
+  vl_shmem_hdr_t *save_shmem_hdr = am->shmem_hdr;
+
+  q = regp->vl_input_queue;
+
+  /*
+   * If the queue head is moving, assume that the client is processing
+   * messages and skip the ping. This heuristic may fail if the queue
+   * is in the same position as last time, net of wrapping; in which
+   * case, the client will receive a keepalive.
+   */
+  if (regp->last_queue_head != q->head)
+    {
+      regp->last_heard = now;
+      regp->unanswered_pings = 0;
+      regp->last_queue_head = q->head;
+      return;
+    }
+
+  /*
+   * push/pop shared memory segment, so this routine
+   * will work with "normal" as well as "private segment"
+   * memory clients..
+   */
+
+  am->vlib_rp = regp->vlib_rp;
+  am->shmem_hdr = regp->shmem_hdr;
+
+  mp = vl_msg_api_alloc (sizeof (*mp));
+  memset (mp, 0, sizeof (*mp));
+  mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_MEMCLNT_KEEPALIVE);
+  mp->context = mp->client_index =
+    vl_msg_api_handle_from_index_and_epoch
+    (regp->vl_api_registration_pool_index,
+     am->shmem_hdr->application_restarts);
+
+  regp->unanswered_pings++;
+
+  /* Failure-to-send due to a stuffed queue is absolutely expected */
+  if (svm_queue_add (q, (u8 *) & mp, 1 /* nowait */ ))
+    vl_msg_api_free (mp);
+
+  am->vlib_rp = save_vlib_rp;
+  am->shmem_hdr = save_shmem_hdr;
+}
+
+void
+vl_mem_api_dead_client_scan (api_main_t * am, vl_shmem_hdr_t * shm, f64 now)
+{
+  vl_api_registration_t **regpp;
+  vl_api_registration_t *regp;
+  static u32 *dead_indices;
+  static u32 *confused_indices;
+
+  vec_reset_length (dead_indices);
+  vec_reset_length (confused_indices);
+
+  /* *INDENT-OFF* */
+  pool_foreach (regpp, am->vl_clients,
+  ({
+    regp = *regpp;
+    if (regp)
+      {
+        /* If we haven't heard from this client recently... */
+        if (regp->last_heard < (now - 10.0))
+          {
+            if (regp->unanswered_pings == 2)
+              {
+                svm_queue_t *q;
+                q = regp->vl_input_queue;
+                if (kill (q->consumer_pid, 0) >=0)
+                  {
+                    clib_warning ("REAPER: lazy binary API client '%s'",
+                                  regp->name);
+                    regp->unanswered_pings = 0;
+                    regp->last_heard = now;
+                  }
+                else
+                  {
+                    clib_warning ("REAPER: binary API client '%s' died",
+                                  regp->name);
+                    vec_add1(dead_indices, regpp - am->vl_clients);
+                  }
+              }
+            else
+              send_memclnt_keepalive (regp, now);
+          }
+        else
+          regp->unanswered_pings = 0;
+      }
+    else
+      {
+        clib_warning ("NULL client registration index %d",
+                      regpp - am->vl_clients);
+        vec_add1 (confused_indices, regpp - am->vl_clients);
+      }
+  }));
+  /* *INDENT-ON* */
+  /* This should "never happen," but if it does, fix it... */
+  if (PREDICT_FALSE (vec_len (confused_indices) > 0))
+    {
+      int i;
+      for (i = 0; i < vec_len (confused_indices); i++)
+	{
+	  pool_put_index (am->vl_clients, confused_indices[i]);
+	}
+    }
+
+  if (PREDICT_FALSE (vec_len (dead_indices) > 0))
+    {
+      int i;
+      svm_region_t *svm;
+      void *oldheap;
+
+      /* Allow the application to clean up its registrations */
+      for (i = 0; i < vec_len (dead_indices); i++)
+	{
+	  regpp = pool_elt_at_index (am->vl_clients, dead_indices[i]);
+	  if (regpp)
+	    {
+	      u32 handle;
+
+	      handle = vl_msg_api_handle_from_index_and_epoch
+		(dead_indices[i], shm->application_restarts);
+	      (void) vl_api_call_reaper_functions (handle);
+	    }
+	}
+
+      svm = am->vlib_rp;
+      pthread_mutex_lock (&svm->mutex);
+      oldheap = svm_push_data_heap (svm);
+
+      for (i = 0; i < vec_len (dead_indices); i++)
+	{
+	  regpp = pool_elt_at_index (am->vl_clients, dead_indices[i]);
+	  if (regpp)
+	    {
+	      /* Is this a pairwise SVM segment? */
+	      if ((*regpp)->vlib_rp != svm)
+		{
+		  int i;
+		  svm_region_t *dead_rp = (*regpp)->vlib_rp;
+		  /* Note: account for the memfd header page */
+		  u64 virtual_base = dead_rp->virtual_base - MMAP_PAGESIZE;
+		  u64 virtual_size = dead_rp->virtual_size + MMAP_PAGESIZE;
+
+		  /* For horizontal scaling, add a hash table... */
+		  for (i = 0; i < vec_len (am->vlib_private_rps); i++)
+		    if (am->vlib_private_rps[i] == dead_rp)
+		      {
+			vec_delete (am->vlib_private_rps, 1, i);
+			goto found;
+		      }
+		  clib_warning ("private rp %llx AWOL", dead_rp);
+
+		found:
+		  /* Kill it, accounting for the memfd header page */
+		  if (munmap ((void *) virtual_base, virtual_size) < 0)
+		    clib_unix_warning ("munmap");
+		  /* Reset the queue-length-address cache */
+		  vec_reset_length (vl_api_queue_cursizes);
+		}
+	      else
+		{
+		  /* Poison the old registration */
+		  memset (*regpp, 0xF3, sizeof (**regpp));
+		  clib_mem_free (*regpp);
+		}
+	      /* no dangling references, please */
+	      *regpp = 0;
+	    }
+	  else
+	    {
+	      svm_pop_heap (oldheap);
+	      clib_warning ("Duplicate free, client index %d",
+			    regpp - am->vl_clients);
+	      oldheap = svm_push_data_heap (svm);
+	    }
+	}
+
+      svm_client_scan_this_region_nolock (am->vlib_rp);
+
+      pthread_mutex_unlock (&svm->mutex);
+      svm_pop_heap (oldheap);
+      for (i = 0; i < vec_len (dead_indices); i++)
+	pool_put_index (am->vl_clients, dead_indices[i]);
+    }
+}
+
+static inline int
+void_mem_api_handle_msg_i (api_main_t * am, vlib_main_t * vm,
+			   vlib_node_runtime_t * node, svm_queue_t * q)
+{
+  uword mp;
+  if (!svm_queue_sub2 (q, (u8 *) & mp))
+    {
+      vl_msg_api_handler_with_vm_node (am, (void *) mp, vm, node);
+      return 0;
+    }
+  return -1;
+}
+
+int
+vl_mem_api_handle_msg_main (vlib_main_t * vm, vlib_node_runtime_t * node)
+{
+  api_main_t *am = &api_main;
+  return void_mem_api_handle_msg_i (am, vm, node,
+				    am->shmem_hdr->vl_input_queue);
+}
+
+int
+vl_mem_api_handle_msg_private (vlib_main_t * vm, vlib_node_runtime_t * node,
+			       u32 reg_index)
+{
+  api_main_t *am = &api_main;
+  vl_shmem_hdr_t *save_shmem_hdr = am->shmem_hdr;
+  svm_region_t *vlib_rp, *save_vlib_rp = am->vlib_rp;
+  svm_queue_t *q;
+  int rv;
+
+  vlib_rp = am->vlib_rp = am->vlib_private_rps[reg_index];
+
+  am->shmem_hdr = (void *) vlib_rp->user_ctx;
+  q = am->shmem_hdr->vl_input_queue;
+
+  rv = void_mem_api_handle_msg_i (am, vm, node, q);
+
+  am->shmem_hdr = save_shmem_hdr;
+  am->vlib_rp = save_vlib_rp;
+
+  return rv;
+}
+
+vl_api_registration_t *
+vl_mem_api_client_index_to_registration (u32 handle)
+{
+  vl_api_registration_t **regpp;
+  vl_api_registration_t *regp;
+  api_main_t *am = &api_main;
+  u32 index;
+
+  index = vl_msg_api_handle_get_index (handle);
+  if ((am->shmem_hdr->application_restarts & VL_API_EPOCH_MASK)
+      != vl_msg_api_handle_get_epoch (handle))
+    {
+      vl_msg_api_increment_missing_client_counter ();
+      return 0;
+    }
+
+  regpp = am->vl_clients + index;
+
+  if (pool_is_free (am->vl_clients, regpp))
+    {
+      vl_msg_api_increment_missing_client_counter ();
+      return 0;
+    }
+  regp = *regpp;
+  return (regp);
+}
+
+svm_queue_t *
+vl_api_client_index_to_input_queue (u32 index)
+{
+  vl_api_registration_t *regp;
+  api_main_t *am = &api_main;
+
+  /* Special case: vlib trying to send itself a message */
+  if (index == (u32) ~ 0)
+    return (am->shmem_hdr->vl_input_queue);
+
+  regp = vl_mem_api_client_index_to_registration (index);
+  if (!regp)
+    return 0;
+  return (regp->vl_input_queue);
+}
+
+static clib_error_t *
+setup_memclnt_exit (vlib_main_t * vm)
+{
+  atexit (vl_unmap_shmem);
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (setup_memclnt_exit);
+
+u8 *
+format_api_message_rings (u8 * s, va_list * args)
+{
+  api_main_t *am = va_arg (*args, api_main_t *);
+  vl_shmem_hdr_t *shmem_hdr = va_arg (*args, vl_shmem_hdr_t *);
+  int main_segment = va_arg (*args, int);
+  ring_alloc_t *ap;
+  int i;
+
+  if (shmem_hdr == 0)
+    return format (s, "%8s %8s %8s %8s %8s\n",
+		   "Owner", "Size", "Nitems", "Hits", "Misses");
+
+  ap = shmem_hdr->vl_rings;
+
+  for (i = 0; i < vec_len (shmem_hdr->vl_rings); i++)
+    {
+      s = format (s, "%8s %8d %8d %8d %8d\n",
+		  "vlib", ap->size, ap->nitems, ap->hits, ap->misses);
+      ap++;
+    }
+
+  ap = shmem_hdr->client_rings;
+
+  for (i = 0; i < vec_len (shmem_hdr->client_rings); i++)
+    {
+      s = format (s, "%8s %8d %8d %8d %8d\n",
+		  "clnt", ap->size, ap->nitems, ap->hits, ap->misses);
+      ap++;
+    }
+
+  if (main_segment)
+    {
+      s = format (s, "%d ring miss fallback allocations\n", am->ring_misses);
+      s = format
+	(s,
+	 "%d application restarts, %d reclaimed msgs, %d garbage collects\n",
+	 shmem_hdr->application_restarts, shmem_hdr->restart_reclaims,
+	 shmem_hdr->garbage_collects);
+    }
+  return s;
+}
+
+static clib_error_t *
+vl_api_ring_command (vlib_main_t * vm,
+		     unformat_input_t * input, vlib_cli_command_t * cli_cmd)
+{
+  int i;
+  vl_shmem_hdr_t *shmem_hdr;
+  api_main_t *am = &api_main;
+
+  /* First, dump the primary region rings.. */
+
+  if (am->vlib_primary_rp == 0 || am->vlib_primary_rp->user_ctx == 0)
+    {
+      vlib_cli_output (vm, "Shared memory segment not initialized...\n");
+      return 0;
+    }
+
+  shmem_hdr = (void *) am->vlib_primary_rp->user_ctx;
+
+  vlib_cli_output (vm, "Main API segment rings:");
+
+  vlib_cli_output (vm, "%U", format_api_message_rings, am,
+		   0 /* print header */ , 0 /* notused */ );
+
+  vlib_cli_output (vm, "%U", format_api_message_rings, am,
+		   shmem_hdr, 1 /* main segment */ );
+
+  for (i = 0; i < vec_len (am->vlib_private_rps); i++)
+    {
+      svm_region_t *vlib_rp = am->vlib_private_rps[i];
+      shmem_hdr = (void *) vlib_rp->user_ctx;
+      vl_api_registration_t **regpp;
+      vl_api_registration_t *regp = 0;
+
+      /* For horizontal scaling, add a hash table... */
+      /* *INDENT-OFF* */
+      pool_foreach (regpp, am->vl_clients,
+      ({
+        regp = *regpp;
+        if (regp && regp->vlib_rp == vlib_rp)
+          {
+            vlib_cli_output (vm, "%s segment rings:", regp->name);
+            goto found;
+          }
+      }));
+      vlib_cli_output (vm, "regp %llx not found?", regp);
+      continue;
+      /* *INDENT-ON* */
+    found:
+      vlib_cli_output (vm, "%U", format_api_message_rings, am,
+		       0 /* print header */ , 0 /* notused */ );
+      vlib_cli_output (vm, "%U", format_api_message_rings, am,
+		       shmem_hdr, 0 /* main segment */ );
+    }
+
+  return 0;
+}
+
+/*?
+ * Display binary api message allocation ring statistics
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_show_api_ring_command, static) =
+{
+  .path = "show api ring-stats",
+  .short_help = "Message ring statistics",
+  .function = vl_api_ring_command,
+};
+/* *INDENT-ON* */
+
+clib_error_t *
+vlibmemory_init (vlib_main_t * vm)
+{
+  api_main_t *am = &api_main;
+  svm_map_region_args_t _a, *a = &_a;
+  clib_error_t *error;
+
+  memset (a, 0, sizeof (*a));
+  a->root_path = am->root_path;
+  a->name = SVM_GLOBAL_REGION_NAME;
+  a->baseva = (am->global_baseva != 0) ?
+    am->global_baseva : SVM_GLOBAL_REGION_BASEVA;
+  a->size = (am->global_size != 0) ? am->global_size : SVM_GLOBAL_REGION_SIZE;
+  a->flags = SVM_FLAGS_NODATA;
+  a->uid = am->api_uid;
+  a->gid = am->api_gid;
+  a->pvt_heap_size =
+    (am->global_pvt_heap_size !=
+     0) ? am->global_pvt_heap_size : SVM_PVT_MHEAP_SIZE;
+
+  svm_region_init_args (a);
+
+  error = vlib_call_init_function (vm, vlibsocket_init);
+
+  return error;
+}
+
+VLIB_INIT_FUNCTION (vlibmemory_init);
+
+void
+vl_set_memory_region_name (const char *name)
+{
+  api_main_t *am = &api_main;
+  am->region_name = name;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vlibmemory/memory_api.h b/src/vlibmemory/memory_api.h
new file mode 100644
index 00000000000..9b87f5a18fd
--- /dev/null
+++ b/src/vlibmemory/memory_api.h
@@ -0,0 +1,80 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2018 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 SRC_VLIBMEMORY_MEMORY_API_H_
+#define SRC_VLIBMEMORY_MEMORY_API_H_
+
+#include <svm/svm.h>
+#include <svm/queue.h>
+#include <vlib/vlib.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/memory_shared.h>
+
+svm_queue_t *vl_api_client_index_to_input_queue (u32 index);
+int vl_mem_api_init (const char *region_name);
+void vl_mem_api_dead_client_scan (api_main_t * am, vl_shmem_hdr_t * shm,
+				  f64 now);
+int vl_mem_api_handle_msg_main (vlib_main_t * vm, vlib_node_runtime_t * node);
+int vl_mem_api_handle_msg_private (vlib_main_t * vm,
+				   vlib_node_runtime_t * node, u32 reg_index);
+vl_api_registration_t *vl_mem_api_client_index_to_registration (u32 handle);
+void vl_mem_api_enable_disable (vlib_main_t * vm, int yesno);
+u32 vl_api_memclnt_create_internal (char *, svm_queue_t *);
+
+static inline u32
+vl_msg_api_handle_get_epoch (u32 index)
+{
+  return (index & VL_API_EPOCH_MASK);
+}
+
+static inline u32
+vl_msg_api_handle_get_index (u32 index)
+{
+  return (index >> VL_API_EPOCH_SHIFT);
+}
+
+static inline u32
+vl_msg_api_handle_from_index_and_epoch (u32 index, u32 epoch)
+{
+  u32 handle;
+  ASSERT (index < 0x00FFFFFF);
+
+  handle = (index << VL_API_EPOCH_SHIFT) | (epoch & VL_API_EPOCH_MASK);
+  return handle;
+}
+
+#define VL_MEM_API_LOG_Q_LEN(fmt,qlen)			\
+if (TRACE_VLIB_MEMORY_QUEUE)				\
+  do {							\
+      ELOG_TYPE_DECLARE (e) = {				\
+        .format = fmt,					\
+        .format_args = "i4",				\
+      };							\
+      struct { u32 len; } *ed;				\
+      ed = ELOG_DATA (&vm->elog_main, e);		\
+      ed->len = qlen;					\
+  } while (0)
+
+#endif /* SRC_VLIBMEMORY_MEMORY_API_H_ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vlibmemory/memory_client.c b/src/vlibmemory/memory_client.c
index c47f25e6e3d..1bb2fe86136 100644
--- a/src/vlibmemory/memory_client.c
+++ b/src/vlibmemory/memory_client.c
@@ -17,33 +17,15 @@
  *------------------------------------------------------------------
  */
 
-#include <stdio.h>
-#include <stdlib.h>
 #include <setjmp.h>
-#include <sys/types.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <netinet/in.h>
-#include <signal.h>
-#include <pthread.h>
-#include <unistd.h>
-#include <time.h>
-#include <fcntl.h>
-#include <string.h>
-#include <vppinfra/clib.h>
-#include <vppinfra/vec.h>
+
+#include <svm/svm.h>
+#include <vppinfra/serialize.h>
 #include <vppinfra/hash.h>
-#include <vppinfra/bitmap.h>
-#include <vppinfra/fifo.h>
-#include <vppinfra/time.h>
-#include <vppinfra/mheap.h>
-#include <vppinfra/heap.h>
-#include <vppinfra/pool.h>
-#include <vppinfra/format.h>
-
-#include <vlib/vlib.h>
-#include <vlib/unix/unix.h>
-#include <vlibmemory/api.h>
+#include <vlibmemory/memory_client.h>
+
+/* A hack. vl_client_get_first_plugin_msg_id depends on it */
+#include <vlibmemory/socket_client.h>
 
 #include <vlibmemory/vl_memory_msg_enum.h>
 
@@ -77,7 +59,7 @@ memory_client_main_t memory_client_main;
 static void *
 rx_thread_fn (void *arg)
 {
-  unix_shared_memory_queue_t *q;
+  svm_queue_t *q;
   memory_client_main_t *mm = &memory_client_main;
   api_main_t *am = &api_main;
   int i;
@@ -178,7 +160,7 @@ vl_client_connect (const char *name, int ctx_quota, int input_queue_size)
   svm_region_t *svm;
   vl_api_memclnt_create_t *mp;
   vl_api_memclnt_create_reply_t *rp;
-  unix_shared_memory_queue_t *vl_input_queue;
+  svm_queue_t *vl_input_queue;
   vl_shmem_hdr_t *shmem_hdr;
   int rv = 0;
   void *oldheap;
@@ -208,8 +190,7 @@ vl_client_connect (const char *name, int ctx_quota, int input_queue_size)
   pthread_mutex_lock (&svm->mutex);
   oldheap = svm_push_data_heap (svm);
   vl_input_queue =
-    unix_shared_memory_queue_init (input_queue_size, sizeof (uword),
-				   getpid (), 0);
+    svm_queue_init (input_queue_size, sizeof (uword), getpid (), 0);
   pthread_mutex_unlock (&svm->mutex);
   svm_pop_heap (oldheap);
 
@@ -235,8 +216,8 @@ vl_client_connect (const char *name, int ctx_quota, int input_queue_size)
       /* Wait up to 10 seconds */
       for (i = 0; i < 1000; i++)
 	{
-	  qstatus = unix_shared_memory_queue_sub (vl_input_queue, (u8 *) & rp,
-						  1 /* nowait */ );
+	  qstatus = svm_queue_sub (vl_input_queue, (u8 *) & rp,
+				   1 /* nowait */ );
 	  if (qstatus == 0)
 	    goto read_one_msg;
 	  ts.tv_sec = 0;
@@ -270,7 +251,7 @@ vl_api_memclnt_delete_reply_t_handler (vl_api_memclnt_delete_reply_t * mp)
 
   pthread_mutex_lock (&am->vlib_rp->mutex);
   oldheap = svm_push_data_heap (am->vlib_rp);
-  unix_shared_memory_queue_free (am->vl_input_queue);
+  svm_queue_free (am->vl_input_queue);
   pthread_mutex_unlock (&am->vlib_rp->mutex);
   svm_pop_heap (oldheap);
 
@@ -284,7 +265,7 @@ vl_client_disconnect (void)
 {
   vl_api_memclnt_delete_t *mp;
   vl_api_memclnt_delete_reply_t *rp;
-  unix_shared_memory_queue_t *vl_input_queue;
+  svm_queue_t *vl_input_queue;
   vl_shmem_hdr_t *shmem_hdr;
   time_t begin;
   api_main_t *am = &api_main;
@@ -323,7 +304,7 @@ vl_client_disconnect (void)
 	  am->shmem_hdr = 0;
 	  break;
 	}
-      if (unix_shared_memory_queue_sub (vl_input_queue, (u8 *) & rp, 1) < 0)
+      if (svm_queue_sub (vl_input_queue, (u8 *) & rp, 1) < 0)
 	continue;
 
       /* drain the queue */
@@ -365,7 +346,6 @@ _(MEMCLNT_CREATE_REPLY, memclnt_create_reply)   \
 _(MEMCLNT_DELETE_REPLY, memclnt_delete_reply)	\
 _(MEMCLNT_KEEPALIVE, memclnt_keepalive)
 
-
 void
 vl_client_install_client_message_handlers (void)
 {
diff --git a/src/vlibmemory/memory_client.h b/src/vlibmemory/memory_client.h
new file mode 100644
index 00000000000..5b4f090af9a
--- /dev/null
+++ b/src/vlibmemory/memory_client.h
@@ -0,0 +1,46 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2018 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 SRC_VLIBMEMORY_MEMORY_CLIENT_H_
+#define SRC_VLIBMEMORY_MEMORY_CLIENT_H_
+
+#include <vlibmemory/memory_shared.h>
+
+int vl_client_connect (const char *name, int ctx_quota, int input_queue_size);
+void vl_client_disconnect (void);
+int vl_client_api_map (const char *region_name);
+void vl_client_api_unmap (void);
+void vl_client_disconnect_from_vlib (void);
+int vl_client_connect_to_vlib (const char *svm_name, const char *client_name,
+			       int rx_queue_size);
+int vl_client_connect_to_vlib_no_rx_pthread (const char *svm_name,
+					     const char *client_name,
+					     int rx_queue_size);
+int vl_client_connect_to_vlib_no_map (const char *svm_name,
+				      const char *client_name,
+				      int rx_queue_size);
+void vl_client_install_client_message_handlers (void);
+
+#endif /* SRC_VLIBMEMORY_MEMORY_CLIENT_H_ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vlibmemory/memory_shared.c b/src/vlibmemory/memory_shared.c
index 0a3c23cbb3e..19285df9efe 100644
--- a/src/vlibmemory/memory_shared.c
+++ b/src/vlibmemory/memory_shared.c
@@ -25,22 +25,20 @@
 #include <string.h>
 #include <unistd.h>
 #include <signal.h>
+
 #include <vppinfra/format.h>
 #include <vppinfra/byte_order.h>
 #include <vppinfra/error.h>
+#include <svm/queue.h>
 #include <vlib/vlib.h>
 #include <vlib/unix/unix.h>
-#include <vlibmemory/api.h>
-#include <vlibmemory/unix_shared_memory_queue.h>
-
+#include <vlibmemory/memory_api.h>
 #include <vlibmemory/vl_memory_msg_enum.h>
 
 #define vl_typedefs
 #include <vlibmemory/vl_memory_api_h.h>
 #undef vl_typedefs
 
-socket_main_t socket_main;
-
 #define DEBUG_MESSAGE_BUFFER_OVERRUN 0
 
 static inline void *
@@ -49,7 +47,7 @@ vl_msg_api_alloc_internal (int nbytes, int pool, int may_return_null)
   int i;
   msgbuf_t *rv;
   ring_alloc_t *ap;
-  unix_shared_memory_queue_t *q;
+  svm_queue_t *q;
   void *oldheap;
   vl_shmem_hdr_t *shmem_hdr;
   api_main_t *am = &api_main;
@@ -376,13 +374,13 @@ vl_api_default_mem_config (vl_shmem_hdr_t * shmem_hdr)
     vlib_input_queue_length = am->vlib_input_queue_length;
 
   shmem_hdr->vl_input_queue =
-    unix_shared_memory_queue_init (vlib_input_queue_length, sizeof (uword),
-				   getpid (), am->vlib_signal);
+    svm_queue_init (vlib_input_queue_length, sizeof (uword),
+		    getpid (), am->vlib_signal);
 
 #define _(sz,n)                                                 \
     do {                                                        \
         ring_alloc_t _rp;                                       \
-        _rp.rp = unix_shared_memory_queue_init ((n), (sz), 0, 0); \
+        _rp.rp = svm_queue_init ((n), (sz), 0, 0); \
         _rp.size = (sz);                                        \
         _rp.nitems = n;                                         \
         _rp.hits = 0;                                           \
@@ -396,7 +394,7 @@ vl_api_default_mem_config (vl_shmem_hdr_t * shmem_hdr)
 #define _(sz,n)                                                 \
     do {                                                        \
         ring_alloc_t _rp;                                       \
-        _rp.rp = unix_shared_memory_queue_init ((n), (sz), 0, 0); \
+        _rp.rp = svm_queue_init ((n), (sz), 0, 0); \
         _rp.size = (sz);                                        \
         _rp.nitems = n;                                         \
         _rp.hits = 0;                                           \
@@ -427,10 +425,9 @@ vl_api_mem_config (vl_shmem_hdr_t * hdr, vl_api_shm_elem_config_t * config)
     switch (c->type)
       {
       case VL_API_QUEUE:
-	hdr->vl_input_queue = unix_shared_memory_queue_init (c->count,
-							     c->size,
-							     getpid (),
-							     am->vlib_signal);
+	hdr->vl_input_queue = svm_queue_init (c->count,
+					      c->size,
+					      getpid (), am->vlib_signal);
 	continue;
       case VL_API_VLIB_RING:
 	vec_add2 (hdr->vl_rings, rp, 1);
@@ -444,7 +441,7 @@ vl_api_mem_config (vl_shmem_hdr_t * hdr, vl_api_shm_elem_config_t * config)
       }
 
     size = sizeof (ring_alloc_t) + c->size;
-    rp->rp = unix_shared_memory_queue_init (c->count, size, 0, 0);
+    rp->rp = svm_queue_init (c->count, size, 0, 0);
     rp->size = size;
     rp->nitems = c->count;
     rp->hits = 0;
@@ -493,7 +490,6 @@ vl_init_shmem (svm_region_t * vlib_rp, vl_api_shm_elem_config_t * config,
   pthread_mutex_unlock (&vlib_rp->mutex);
 }
 
-
 int
 vl_map_shmem (const char *region_name, int is_vlib)
 {
@@ -548,7 +544,7 @@ vl_map_shmem (const char *region_name, int is_vlib)
       am->our_pid = getpid ();
       if (is_vlib)
 	{
-	  unix_shared_memory_queue_t *q;
+	  svm_queue_t *q;
 	  uword old_msg;
 	  /*
 	   * application restart. Reset cached pids, API message
@@ -581,9 +577,7 @@ vl_map_shmem (const char *region_name, int is_vlib)
 
 	mutex_ok:
 	  am->vlib_rp = vlib_rp;
-	  while (unix_shared_memory_queue_sub (q,
-					       (u8 *) & old_msg,
-					       1 /* nowait */ )
+	  while (svm_queue_sub (q, (u8 *) & old_msg, 1 /* nowait */ )
 		 != -2 /* queue underflow */ )
 	    {
 	      vl_msg_api_free_nolock ((void *) old_msg);
@@ -676,7 +670,7 @@ vl_unmap_shmem (void)
 }
 
 void
-vl_msg_api_send_shmem (unix_shared_memory_queue_t * q, u8 * elem)
+vl_msg_api_send_shmem (svm_queue_t * q, u8 * elem)
 {
   api_main_t *am = &api_main;
   uword *trace = (uword *) elem;
@@ -684,11 +678,11 @@ vl_msg_api_send_shmem (unix_shared_memory_queue_t * q, u8 * elem)
   if (am->tx_trace && am->tx_trace->enabled)
     vl_msg_api_trace (am, am->tx_trace, (void *) trace[0]);
 
-  (void) unix_shared_memory_queue_add (q, elem, 0 /* nowait */ );
+  (void) svm_queue_add (q, elem, 0 /* nowait */ );
 }
 
 void
-vl_msg_api_send_shmem_nolock (unix_shared_memory_queue_t * q, u8 * elem)
+vl_msg_api_send_shmem_nolock (svm_queue_t * q, u8 * elem)
 {
   api_main_t *am = &api_main;
   uword *trace = (uword *) elem;
@@ -696,74 +690,7 @@ vl_msg_api_send_shmem_nolock (unix_shared_memory_queue_t * q, u8 * elem)
   if (am->tx_trace && am->tx_trace->enabled)
     vl_msg_api_trace (am, am->tx_trace, (void *) trace[0]);
 
-  (void) unix_shared_memory_queue_add_nolock (q, elem);
-}
-
-u32
-vl_api_get_msg_index (u8 * name_and_crc)
-{
-  api_main_t *am = &api_main;
-  uword *p;
-
-  if (am->msg_index_by_name_and_crc)
-    {
-      p = hash_get_mem (am->msg_index_by_name_and_crc, name_and_crc);
-      if (p)
-	return p[0];
-    }
-  return ~0;
-}
-
-static inline vl_api_registration_t *
-vl_api_client_index_to_registration_internal (u32 handle)
-{
-  vl_api_registration_t **regpp;
-  vl_api_registration_t *regp;
-  api_main_t *am = &api_main;
-  u32 index;
-
-  index = vl_msg_api_handle_get_index (handle);
-  if ((am->shmem_hdr->application_restarts & VL_API_EPOCH_MASK)
-      != vl_msg_api_handle_get_epoch (handle))
-    {
-      vl_msg_api_increment_missing_client_counter ();
-      return 0;
-    }
-
-  regpp = am->vl_clients + index;
-
-  if (pool_is_free (am->vl_clients, regpp))
-    {
-      vl_msg_api_increment_missing_client_counter ();
-      return 0;
-    }
-  regp = *regpp;
-  return (regp);
-}
-
-vl_api_registration_t *
-vl_api_client_index_to_registration (u32 index)
-{
-  if (PREDICT_FALSE (socket_main.current_rp != 0))
-    return socket_main.current_rp;
-
-  return (vl_api_client_index_to_registration_internal (index));
-}
-
-unix_shared_memory_queue_t *
-vl_api_client_index_to_input_queue (u32 index)
-{
-  vl_api_registration_t *regp;
-  api_main_t *am = &api_main;
-
-  /* Special case: vlib trying to send itself a message */
-  if (index == (u32) ~ 0)
-    return (am->shmem_hdr->vl_input_queue);
-
-  regp = vl_api_client_index_to_registration_internal (index);
-  if (!regp)
-    return 0;
-  return (regp->vl_input_queue);
+  (void) svm_queue_add_nolock (q, elem);
 }
 
 /*
diff --git a/src/vlibmemory/memory_shared.h b/src/vlibmemory/memory_shared.h
new file mode 100644
index 00000000000..f60224a1815
--- /dev/null
+++ b/src/vlibmemory/memory_shared.h
@@ -0,0 +1,138 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2018 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 SRC_VLIBMEMORY_MEMORY_SHARED_H_
+#define SRC_VLIBMEMORY_MEMORY_SHARED_H_
+
+#include <vlibapi/api_common.h>
+#include <vppinfra/error.h>
+
+/* Allocated in shared memory */
+
+/*
+ * Ring-allocation scheme for client API messages
+ *
+ * Only one proc/thread has control of a given message buffer.
+ * To free a buffer allocated from one of these rings, we clear
+ * a field in the buffer (header), and leave.
+ *
+ * No locks, no hits, no errors...
+ */
+typedef struct ring_alloc_
+{
+  svm_queue_t *rp;
+  u16 size;
+  u16 nitems;
+  u32 hits;
+  u32 misses;
+} ring_alloc_t;
+
+typedef enum
+{
+  VL_API_VLIB_RING,
+  VL_API_CLIENT_RING,
+  VL_API_QUEUE
+} vl_api_shm_config_type_t;
+
+typedef struct vl_api_shm_elem_config_
+{
+  u8 type;
+  u8 _pad;
+  u16 count;
+  u32 size;
+} vl_api_shm_elem_config_t;
+
+STATIC_ASSERT (sizeof (vl_api_shm_elem_config_t) == 8,
+	       "Size must be exactly 8 bytes");
+
+/*
+ * Initializers for the (shared-memory) rings
+ * _(size, n). Note: each msg has space for a header.
+ */
+#define foreach_vl_aring_size                   \
+_(64+sizeof(ring_alloc_t), 1024)                \
+_(256+sizeof(ring_alloc_t), 128)                \
+_(1024+sizeof(ring_alloc_t), 64)
+
+#define foreach_clnt_aring_size                 \
+ _(1024+sizeof(ring_alloc_t), 1024)             \
+ _(2048+sizeof(ring_alloc_t), 128)              \
+ _(4096+sizeof(ring_alloc_t), 8)
+
+typedef struct vl_shmem_hdr_
+{
+  int version;
+
+  /* getpid () for the VLIB client process */
+  volatile int vl_pid;
+
+  /* Client sends VLIB msgs here. */
+  svm_queue_t *vl_input_queue;
+
+  /* Vector of rings; one for each size. */
+
+  /* VLIB allocates buffers to send msgs to clients here. */
+  ring_alloc_t *vl_rings;
+
+  /* Clients allocate buffer to send msgs to VLIB here. */
+  ring_alloc_t *client_rings;
+
+  /* Number of detected application restarts */
+  u32 application_restarts;
+
+  /* Number of messages reclaimed during application restart */
+  u32 restart_reclaims;
+
+  /* Number of garbage-collected messages */
+  u32 garbage_collects;
+} vl_shmem_hdr_t;
+
+#define VL_SHM_VERSION 2
+#define VL_API_EPOCH_MASK 0xFF
+#define VL_API_EPOCH_SHIFT 8
+
+void *vl_msg_api_alloc (int nbytes);
+void *vl_msg_api_alloc_or_null (int nbytes);
+void *vl_msg_api_alloc_as_if_client (int nbytes);
+void *vl_msg_api_alloc_as_if_client_or_null (int nbytes);
+void vl_msg_api_free (void *a);
+int vl_map_shmem (const char *region_name, int is_vlib);
+void vl_unmap_shmem (void);
+void vl_register_mapped_shmem_region (svm_region_t * rp);
+void vl_msg_api_send_shmem (svm_queue_t * q, u8 * elem);
+void vl_msg_api_send_shmem_nolock (svm_queue_t * q, u8 * elem);
+void vl_set_memory_region_name (const char *name);
+void vl_set_memory_root_path (const char *root_path);
+void vl_set_memory_uid (int uid);
+void vl_set_memory_gid (int gid);
+void vl_set_global_memory_baseva (u64 baseva);
+void vl_set_global_memory_size (u64 size);
+void vl_set_api_memory_size (u64 size);
+void vl_set_global_pvt_heap_size (u64 size);
+void vl_set_api_pvt_heap_size (u64 size);
+void vl_init_shmem (svm_region_t * vlib_rp, vl_api_shm_elem_config_t * config,
+		    int is_vlib, int is_private_region);
+
+#endif /* SRC_VLIBMEMORY_MEMORY_SHARED_H_ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vlibmemory/memory_vlib.c b/src/vlibmemory/memory_vlib.c
deleted file mode 100644
index 345b40412c0..00000000000
--- a/src/vlibmemory/memory_vlib.c
+++ /dev/null
@@ -1,2803 +0,0 @@
-/*
- *------------------------------------------------------------------
- * memory_vlib.c
- *
- * Copyright (c) 2009 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.
- *------------------------------------------------------------------
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <pthread.h>
-#include <vppinfra/vec.h>
-#include <vppinfra/hash.h>
-#include <vppinfra/pool.h>
-#include <vppinfra/format.h>
-#include <vppinfra/byte_order.h>
-#include <vppinfra/elog.h>
-#include <stdarg.h>
-#include <vlib/vlib.h>
-#include <vlib/unix/unix.h>
-#include <vlibapi/api.h>
-#include <vlibmemory/api.h>
-
-/**
- * @file
- * @brief Binary API messaging via shared memory
- * Low-level, primary provisioning interface
- */
-/*? %%clicmd:group_label Binary API CLI %% ?*/
-/*? %%syscfg:group_label Binary API configuration %% ?*/
-
-#define TRACE_VLIB_MEMORY_QUEUE 0
-
-#include <vlibmemory/vl_memory_msg_enum.h>	/* enumerate all vlib messages */
-
-#define vl_typedefs		/* define message structures */
-#include <vlibmemory/vl_memory_api_h.h>
-#undef vl_typedefs
-
-/* instantiate all the print functions we know about */
-#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
-#define vl_printfun
-#include <vlibmemory/vl_memory_api_h.h>
-#undef vl_printfun
-
-static inline void *
-vl_api_memclnt_create_t_print (vl_api_memclnt_create_t * a, void *handle)
-{
-  vl_print (handle, "vl_api_memclnt_create_t:\n");
-  vl_print (handle, "name: %s\n", a->name);
-  vl_print (handle, "input_queue: 0x%wx\n", a->input_queue);
-  vl_print (handle, "context: %u\n", (unsigned) a->context);
-  vl_print (handle, "ctx_quota: %ld\n", (long) a->ctx_quota);
-  return handle;
-}
-
-static inline void *
-vl_api_memclnt_delete_t_print (vl_api_memclnt_delete_t * a, void *handle)
-{
-  vl_print (handle, "vl_api_memclnt_delete_t:\n");
-  vl_print (handle, "index: %u\n", (unsigned) a->index);
-  vl_print (handle, "handle: 0x%wx\n", a->handle);
-  return handle;
-}
-
-static inline void *
-vl_api_trace_plugin_msg_ids_t_print (vl_api_trace_plugin_msg_ids_t * a,
-				     void *handle)
-{
-  vl_print (handle, "vl_api_trace_plugin_msg_ids: %s first %u last %u\n",
-	    a->plugin_name,
-	    clib_host_to_net_u16 (a->first_msg_id),
-	    clib_host_to_net_u16 (a->last_msg_id));
-  return handle;
-}
-
-/* instantiate all the endian swap functions we know about */
-#define vl_endianfun
-#include <vlibmemory/vl_memory_api_h.h>
-#undef vl_endianfun
-
-extern void vl_socket_api_send (vl_api_registration_t * rp, u8 * elem);
-
-void
-vl_msg_api_send (vl_api_registration_t * rp, u8 * elem)
-{
-  if (PREDICT_FALSE (rp->registration_type > REGISTRATION_TYPE_SHMEM))
-    {
-      vl_socket_api_send (rp, elem);
-    }
-  else
-    {
-      vl_msg_api_send_shmem (rp->vl_input_queue, (u8 *) & elem);
-    }
-}
-
-u8 *
-vl_api_serialize_message_table (api_main_t * am, u8 * vector)
-{
-  serialize_main_t _sm, *sm = &_sm;
-  hash_pair_t *hp;
-  u32 nmsg = hash_elts (am->msg_index_by_name_and_crc);
-
-  serialize_open_vector (sm, vector);
-
-  /* serialize the count */
-  serialize_integer (sm, nmsg, sizeof (u32));
-
-  /* *INDENT-OFF* */
-  hash_foreach_pair (hp, am->msg_index_by_name_and_crc,
-  ({
-    serialize_likely_small_unsigned_integer (sm, hp->value[0]);
-    serialize_cstring (sm, (char *) hp->key);
-  }));
-  /* *INDENT-ON* */
-
-  return serialize_close_vector (sm);
-}
-
-/*
- * vl_api_memclnt_create_internal
- */
-
-u32
-vl_api_memclnt_create_internal (char *name, unix_shared_memory_queue_t * q)
-{
-  vl_api_registration_t **regpp;
-  vl_api_registration_t *regp;
-  svm_region_t *svm;
-  void *oldheap;
-  api_main_t *am = &api_main;
-
-  ASSERT (vlib_get_thread_index () == 0);
-  pool_get (am->vl_clients, regpp);
-
-  svm = am->vlib_rp;
-
-  pthread_mutex_lock (&svm->mutex);
-  oldheap = svm_push_data_heap (svm);
-  *regpp = clib_mem_alloc (sizeof (vl_api_registration_t));
-
-  regp = *regpp;
-  memset (regp, 0, sizeof (*regp));
-  regp->registration_type = REGISTRATION_TYPE_SHMEM;
-  regp->vl_api_registration_pool_index = regpp - am->vl_clients;
-  regp->vlib_rp = svm;
-  regp->shmem_hdr = am->shmem_hdr;
-
-  regp->vl_input_queue = q;
-  regp->name = format (0, "%s%c", name, 0);
-
-  pthread_mutex_unlock (&svm->mutex);
-  svm_pop_heap (oldheap);
-  return vl_msg_api_handle_from_index_and_epoch
-    (regp->vl_api_registration_pool_index,
-     am->shmem_hdr->application_restarts);
-}
-
-
-/*
- * vl_api_memclnt_create_t_handler
- */
-void
-vl_api_memclnt_create_t_handler (vl_api_memclnt_create_t * mp)
-{
-  vl_api_registration_t **regpp;
-  vl_api_registration_t *regp;
-  vl_api_memclnt_create_reply_t *rp;
-  svm_region_t *svm;
-  unix_shared_memory_queue_t *q;
-  int rv = 0;
-  void *oldheap;
-  api_main_t *am = &api_main;
-
-  /*
-   * This is tortured. Maintain a vlib-address-space private
-   * pool of client registrations. We use the shared-memory virtual
-   * address of client structure as a handle, to allow direct
-   * manipulation of context quota vbls from the client library.
-   *
-   * This scheme causes trouble w/ API message trace replay, since
-   * some random VA from clib_mem_alloc() certainly won't
-   * occur in the Linux sim. The (very) few places
-   * that care need to use the pool index.
-   *
-   * Putting the registration object(s) into a pool in shared memory and
-   * using the pool index as a handle seems like a great idea.
-   * Unfortunately, each and every reference to that pool would need
-   * to be protected by a mutex:
-   *
-   *     Client                      VLIB
-   *     ------                      ----
-   *     convert pool index to
-   *     pointer.
-   *     <deschedule>
-   *                                 expand pool
-   *                                 <deschedule>
-   *     kaboom!
-   */
-
-  pool_get (am->vl_clients, regpp);
-
-  svm = am->vlib_rp;
-
-  pthread_mutex_lock (&svm->mutex);
-  oldheap = svm_push_data_heap (svm);
-  *regpp = clib_mem_alloc (sizeof (vl_api_registration_t));
-
-  regp = *regpp;
-  memset (regp, 0, sizeof (*regp));
-  regp->registration_type = REGISTRATION_TYPE_SHMEM;
-  regp->vl_api_registration_pool_index = regpp - am->vl_clients;
-  regp->vlib_rp = svm;
-  regp->shmem_hdr = am->shmem_hdr;
-
-  q = regp->vl_input_queue = (unix_shared_memory_queue_t *) (uword)
-    mp->input_queue;
-
-  regp->name = format (0, "%s", mp->name);
-  vec_add1 (regp->name, 0);
-
-  if (am->serialized_message_table_in_shmem == 0)
-    am->serialized_message_table_in_shmem =
-      vl_api_serialize_message_table (am, 0);
-
-  pthread_mutex_unlock (&svm->mutex);
-  svm_pop_heap (oldheap);
-
-  rp = vl_msg_api_alloc (sizeof (*rp));
-  rp->_vl_msg_id = ntohs (VL_API_MEMCLNT_CREATE_REPLY);
-  rp->handle = (uword) regp;
-  rp->index = vl_msg_api_handle_from_index_and_epoch
-    (regp->vl_api_registration_pool_index,
-     am->shmem_hdr->application_restarts);
-  rp->context = mp->context;
-  rp->response = ntohl (rv);
-  rp->message_table =
-    pointer_to_uword (am->serialized_message_table_in_shmem);
-
-  vl_msg_api_send_shmem (q, (u8 *) & rp);
-}
-
-static int
-call_reaper_functions (u32 client_index)
-{
-  clib_error_t *error = 0;
-  _vl_msg_api_function_list_elt_t *i;
-
-  i = api_main.reaper_function_registrations;
-  while (i)
-    {
-      error = i->f (client_index);
-      if (error)
-	clib_error_report (error);
-      i = i->next_init_function;
-    }
-  return 0;
-}
-
-/*
- * vl_api_memclnt_delete_t_handler
- */
-void
-vl_api_memclnt_delete_t_handler (vl_api_memclnt_delete_t * mp)
-{
-  vl_api_registration_t **regpp;
-  vl_api_registration_t *regp;
-  vl_api_memclnt_delete_reply_t *rp;
-  svm_region_t *svm;
-  void *oldheap;
-  api_main_t *am = &api_main;
-  u32 handle, client_index, epoch;
-
-  handle = mp->index;
-
-  if (call_reaper_functions (handle))
-    return;
-
-  epoch = vl_msg_api_handle_get_epoch (handle);
-  client_index = vl_msg_api_handle_get_index (handle);
-
-  if (epoch != (am->shmem_hdr->application_restarts & VL_API_EPOCH_MASK))
-    {
-      clib_warning
-	("Stale clnt delete index %d old epoch %d cur epoch %d",
-	 client_index, epoch,
-	 (am->shmem_hdr->application_restarts & VL_API_EPOCH_MASK));
-      return;
-    }
-
-  regpp = am->vl_clients + client_index;
-
-  if (!pool_is_free (am->vl_clients, regpp))
-    {
-      int i;
-      regp = *regpp;
-      svm = am->vlib_rp;
-      int private_registration = 0;
-
-      /*
-       * Note: the API message handling path will set am->vlib_rp
-       * as appropriate for pairwise / private memory segments
-       */
-      rp = vl_msg_api_alloc (sizeof (*rp));
-      rp->_vl_msg_id = ntohs (VL_API_MEMCLNT_DELETE_REPLY);
-      rp->handle = mp->handle;
-      rp->response = 1;
-
-      vl_msg_api_send_shmem (regp->vl_input_queue, (u8 *) & rp);
-
-      if (client_index != regp->vl_api_registration_pool_index)
-	{
-	  clib_warning ("mismatch client_index %d pool_index %d",
-			client_index, regp->vl_api_registration_pool_index);
-	  vl_msg_api_free (rp);
-	  return;
-	}
-
-      /* For horizontal scaling, add a hash table... */
-      for (i = 0; i < vec_len (am->vlib_private_rps); i++)
-	{
-	  /* Is this a pairwise / private API segment? */
-	  if (am->vlib_private_rps[i] == svm)
-	    {
-	      /* Note: account for the memfd header page */
-	      u64 virtual_base = svm->virtual_base - MMAP_PAGESIZE;
-	      u64 virtual_size = svm->virtual_size + MMAP_PAGESIZE;
-
-	      /*
-	       * Kill the registration pool element before we make
-	       * the index vanish forever
-	       */
-	      pool_put_index (am->vl_clients,
-			      regp->vl_api_registration_pool_index);
-
-	      vec_delete (am->vlib_private_rps, 1, i);
-	      /* Kill it, accounting for the memfd header page */
-	      if (munmap ((void *) virtual_base, virtual_size) < 0)
-		clib_unix_warning ("munmap");
-	      /* Reset the queue-length-address cache */
-	      vec_reset_length (vl_api_queue_cursizes);
-	      private_registration = 1;
-	      break;
-	    }
-	}
-
-      /* No dangling references, please */
-      *regpp = 0;
-
-      if (private_registration == 0)
-	{
-	  pool_put_index (am->vl_clients,
-			  regp->vl_api_registration_pool_index);
-	  pthread_mutex_lock (&svm->mutex);
-	  oldheap = svm_push_data_heap (svm);
-	  /* Poison the old registration */
-	  memset (regp, 0xF1, sizeof (*regp));
-	  clib_mem_free (regp);
-	  pthread_mutex_unlock (&svm->mutex);
-	  svm_pop_heap (oldheap);
-	  /*
-	   * These messages must be freed manually, since they're set up
-	   * as "bounce" messages. In the private_registration == 1 case,
-	   * we kill the shared-memory segment which contains the message
-	   * with munmap.
-	   */
-	  vl_msg_api_free (mp);
-	}
-    }
-  else
-    {
-      clib_warning ("unknown client ID %d", mp->index);
-    }
-}
-
-static void
-vl_api_get_first_msg_id_t_handler (vl_api_get_first_msg_id_t * mp)
-{
-  vl_api_get_first_msg_id_reply_t *rmp;
-  vl_api_registration_t *regp;
-  uword *p;
-  api_main_t *am = &api_main;
-  vl_api_msg_range_t *rp;
-  u8 name[64];
-  u16 first_msg_id = ~0;
-  int rv = -7;			/* VNET_API_ERROR_INVALID_VALUE */
-
-  regp = vl_api_client_index_to_registration (mp->client_index);
-  if (!regp)
-    return;
-
-  if (am->msg_range_by_name == 0)
-    goto out;
-
-  strncpy ((char *) name, (char *) mp->name, ARRAY_LEN (name) - 1);
-
-  p = hash_get_mem (am->msg_range_by_name, name);
-  if (p == 0)
-    goto out;
-
-  rp = vec_elt_at_index (am->msg_ranges, p[0]);
-  first_msg_id = rp->first_msg_id;
-  rv = 0;
-
-out:
-  rmp = vl_msg_api_alloc (sizeof (*rmp));
-  rmp->_vl_msg_id = ntohs (VL_API_GET_FIRST_MSG_ID_REPLY);
-  rmp->context = mp->context;
-  rmp->retval = ntohl (rv);
-  rmp->first_msg_id = ntohs (first_msg_id);
-  vl_msg_api_send (regp, (u8 *) rmp);
-}
-
-/**
- * client answered a ping, stave off the grim reaper...
- */
-
-void
-  vl_api_memclnt_keepalive_reply_t_handler
-  (vl_api_memclnt_keepalive_reply_t * mp)
-{
-  vl_api_registration_t *regp;
-  vlib_main_t *vm = vlib_get_main ();
-
-  regp = vl_api_client_index_to_registration (mp->context);
-  if (regp)
-    {
-      regp->last_heard = vlib_time_now (vm);
-      regp->unanswered_pings = 0;
-    }
-  else
-    clib_warning ("BUG: anonymous memclnt_keepalive_reply");
-}
-
-/**
- * We can send ourselves these messages if someone uses the
- * builtin binary api test tool...
- */
-static void
-vl_api_memclnt_keepalive_t_handler (vl_api_memclnt_keepalive_t * mp)
-{
-  vl_api_memclnt_keepalive_reply_t *rmp;
-  api_main_t *am;
-  vl_shmem_hdr_t *shmem_hdr;
-
-  am = &api_main;
-  shmem_hdr = am->shmem_hdr;
-
-  rmp = vl_msg_api_alloc_as_if_client (sizeof (*rmp));
-  memset (rmp, 0, sizeof (*rmp));
-  rmp->_vl_msg_id = ntohs (VL_API_MEMCLNT_KEEPALIVE_REPLY);
-  rmp->context = mp->context;
-  vl_msg_api_send_shmem (shmem_hdr->vl_input_queue, (u8 *) & rmp);
-}
-
-void
-vl_api_api_versions_t_handler (vl_api_api_versions_t * mp)
-{
-  api_main_t *am = &api_main;
-  vl_api_api_versions_reply_t *rmp;
-  unix_shared_memory_queue_t *q;
-  u32 nmsg = vec_len (am->api_version_list);
-  int msg_size = sizeof (*rmp) + sizeof (rmp->api_versions[0]) * nmsg;
-  int i;
-
-  q = vl_api_client_index_to_input_queue (mp->client_index);
-  if (q == 0)
-    return;
-
-  rmp = vl_msg_api_alloc (msg_size);
-  memset (rmp, 0, msg_size);
-  rmp->_vl_msg_id = ntohs (VL_API_API_VERSIONS_REPLY);
-
-  /* fill in the message */
-  rmp->context = mp->context;
-  rmp->count = htonl (nmsg);
-
-  for (i = 0; i < nmsg; ++i)
-    {
-      api_version_t *vl = &am->api_version_list[i];
-      rmp->api_versions[i].major = htonl (vl->major);
-      rmp->api_versions[i].minor = htonl (vl->minor);
-      rmp->api_versions[i].patch = htonl (vl->patch);
-      strncpy ((char *) rmp->api_versions[i].name, vl->name, 64 - 1);
-    }
-
-  vl_msg_api_send_shmem (q, (u8 *) & rmp);
-
-}
-
-#define foreach_vlib_api_msg                            \
-_(MEMCLNT_CREATE, memclnt_create)                       \
-_(MEMCLNT_DELETE, memclnt_delete)                       \
-_(GET_FIRST_MSG_ID, get_first_msg_id)                   \
-_(MEMCLNT_KEEPALIVE, memclnt_keepalive)                 \
-_(MEMCLNT_KEEPALIVE_REPLY, memclnt_keepalive_reply)	\
-_(API_VERSIONS, api_versions)
-
-/*
- * vl_api_init
- */
-static int
-memory_api_init (const char *region_name)
-{
-  int rv;
-  api_main_t *am = &api_main;
-  vl_msg_api_msg_config_t cfg;
-  vl_msg_api_msg_config_t *c = &cfg;
-
-  memset (c, 0, sizeof (*c));
-
-  if ((rv = vl_map_shmem (region_name, 1 /* is_vlib */ )) < 0)
-    return rv;
-
-#define _(N,n) do {                                             \
-    c->id = VL_API_##N;                                         \
-    c->name = #n;                                               \
-    c->handler = vl_api_##n##_t_handler;                        \
-    c->cleanup = vl_noop_handler;                               \
-    c->endian = vl_api_##n##_t_endian;                          \
-    c->print = vl_api_##n##_t_print;                            \
-    c->size = sizeof(vl_api_##n##_t);                           \
-    c->traced = 1; /* trace, so these msgs print */             \
-    c->replay = 0; /* don't replay client create/delete msgs */ \
-    c->message_bounce = 0; /* don't bounce this message */	\
-    vl_msg_api_config(c);} while (0);
-
-  foreach_vlib_api_msg;
-#undef _
-
-  /*
-   * special-case freeing of memclnt_delete messages, so we can
-   * simply munmap pairwise / private API segments...
-   */
-  am->message_bounce[VL_API_MEMCLNT_DELETE] = 1;
-  am->is_mp_safe[VL_API_MEMCLNT_KEEPALIVE_REPLY] = 1;
-
-  return 0;
-}
-
-#define foreach_histogram_bucket                \
-_(400)                                          \
-_(200)                                          \
-_(100)                                          \
-_(10)
-
-typedef enum
-{
-#define _(n) SLEEP_##n##_US,
-  foreach_histogram_bucket
-#undef _
-    SLEEP_N_BUCKETS,
-} histogram_index_t;
-
-static u64 vector_rate_histogram[SLEEP_N_BUCKETS];
-
-static void memclnt_queue_callback (vlib_main_t * vm);
-
-/*
- * Callback to send ourselves a plugin numbering-space trace msg
- */
-static void
-send_one_plugin_msg_ids_msg (u8 * name, u16 first_msg_id, u16 last_msg_id)
-{
-  vl_api_trace_plugin_msg_ids_t *mp;
-  api_main_t *am = &api_main;
-  vl_shmem_hdr_t *shmem_hdr = am->shmem_hdr;
-  unix_shared_memory_queue_t *q;
-
-  mp = vl_msg_api_alloc_as_if_client (sizeof (*mp));
-  memset (mp, 0, sizeof (*mp));
-
-  mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_TRACE_PLUGIN_MSG_IDS);
-  strncpy ((char *) mp->plugin_name, (char *) name,
-	   sizeof (mp->plugin_name) - 1);
-  mp->first_msg_id = clib_host_to_net_u16 (first_msg_id);
-  mp->last_msg_id = clib_host_to_net_u16 (last_msg_id);
-
-  q = shmem_hdr->vl_input_queue;
-
-  vl_msg_api_send_shmem (q, (u8 *) & mp);
-}
-
-static void
-send_memclnt_keepalive (vl_api_registration_t * regp, f64 now)
-{
-  vl_api_memclnt_keepalive_t *mp;
-  unix_shared_memory_queue_t *q;
-  api_main_t *am = &api_main;
-  svm_region_t *save_vlib_rp = am->vlib_rp;
-  vl_shmem_hdr_t *save_shmem_hdr = am->shmem_hdr;
-
-  q = regp->vl_input_queue;
-
-  /*
-   * If the queue head is moving, assume that the client is processing
-   * messages and skip the ping. This heuristic may fail if the queue
-   * is in the same position as last time, net of wrapping; in which
-   * case, the client will receive a keepalive.
-   */
-  if (regp->last_queue_head != q->head)
-    {
-      regp->last_heard = now;
-      regp->unanswered_pings = 0;
-      regp->last_queue_head = q->head;
-      return;
-    }
-
-  /*
-   * push/pop shared memory segment, so this routine
-   * will work with "normal" as well as "private segment"
-   * memory clients..
-   */
-
-  am->vlib_rp = regp->vlib_rp;
-  am->shmem_hdr = regp->shmem_hdr;
-
-  mp = vl_msg_api_alloc (sizeof (*mp));
-  memset (mp, 0, sizeof (*mp));
-  mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_MEMCLNT_KEEPALIVE);
-  mp->context = mp->client_index =
-    vl_msg_api_handle_from_index_and_epoch
-    (regp->vl_api_registration_pool_index,
-     am->shmem_hdr->application_restarts);
-
-  regp->unanswered_pings++;
-
-  /* Failure-to-send due to a stuffed queue is absolutely expected */
-  if (unix_shared_memory_queue_add (q, (u8 *) & mp, 1 /* nowait */ ))
-    vl_msg_api_free (mp);
-
-  am->vlib_rp = save_vlib_rp;
-  am->shmem_hdr = save_shmem_hdr;
-}
-
-static void
-dead_client_scan (api_main_t * am, vl_shmem_hdr_t * shm, f64 now)
-{
-
-  vl_api_registration_t **regpp;
-  vl_api_registration_t *regp;
-  static u32 *dead_indices;
-  static u32 *confused_indices;
-
-  vec_reset_length (dead_indices);
-  vec_reset_length (confused_indices);
-
-  /* *INDENT-OFF* */
-  pool_foreach (regpp, am->vl_clients,
-  ({
-    regp = *regpp;
-    if (regp)
-      {
-        /* If we haven't heard from this client recently... */
-        if (regp->last_heard < (now - 10.0))
-          {
-            if (regp->unanswered_pings == 2)
-              {
-                unix_shared_memory_queue_t *q;
-                q = regp->vl_input_queue;
-                if (kill (q->consumer_pid, 0) >=0)
-                  {
-                    clib_warning ("REAPER: lazy binary API client '%s'",
-                                  regp->name);
-                    regp->unanswered_pings = 0;
-                    regp->last_heard = now;
-                  }
-                else
-                  {
-                    clib_warning ("REAPER: binary API client '%s' died",
-                                  regp->name);
-                    vec_add1(dead_indices, regpp - am->vl_clients);
-                  }
-              }
-            else
-              send_memclnt_keepalive (regp, now);
-          }
-        else
-          regp->unanswered_pings = 0;
-      }
-    else
-      {
-        clib_warning ("NULL client registration index %d",
-                      regpp - am->vl_clients);
-        vec_add1 (confused_indices, regpp - am->vl_clients);
-      }
-  }));
-  /* *INDENT-ON* */
-  /* This should "never happen," but if it does, fix it... */
-  if (PREDICT_FALSE (vec_len (confused_indices) > 0))
-    {
-      int i;
-      for (i = 0; i < vec_len (confused_indices); i++)
-	{
-	  pool_put_index (am->vl_clients, confused_indices[i]);
-	}
-    }
-
-  if (PREDICT_FALSE (vec_len (dead_indices) > 0))
-    {
-      int i;
-      svm_region_t *svm;
-      void *oldheap;
-
-      /* Allow the application to clean up its registrations */
-      for (i = 0; i < vec_len (dead_indices); i++)
-	{
-	  regpp = pool_elt_at_index (am->vl_clients, dead_indices[i]);
-	  if (regpp)
-	    {
-	      u32 handle;
-
-	      handle = vl_msg_api_handle_from_index_and_epoch
-		(dead_indices[i], shm->application_restarts);
-	      (void) call_reaper_functions (handle);
-	    }
-	}
-
-      svm = am->vlib_rp;
-      pthread_mutex_lock (&svm->mutex);
-      oldheap = svm_push_data_heap (svm);
-
-      for (i = 0; i < vec_len (dead_indices); i++)
-	{
-	  regpp = pool_elt_at_index (am->vl_clients, dead_indices[i]);
-	  if (regpp)
-	    {
-	      /* Is this a pairwise SVM segment? */
-	      if ((*regpp)->vlib_rp != svm)
-		{
-		  int i;
-		  svm_region_t *dead_rp = (*regpp)->vlib_rp;
-		  /* Note: account for the memfd header page */
-		  u64 virtual_base = dead_rp->virtual_base - MMAP_PAGESIZE;
-		  u64 virtual_size = dead_rp->virtual_size + MMAP_PAGESIZE;
-
-		  /* For horizontal scaling, add a hash table... */
-		  for (i = 0; i < vec_len (am->vlib_private_rps); i++)
-		    if (am->vlib_private_rps[i] == dead_rp)
-		      {
-			vec_delete (am->vlib_private_rps, 1, i);
-			goto found;
-		      }
-		  clib_warning ("private rp %llx AWOL", dead_rp);
-
-		found:
-		  /* Kill it, accounting for the memfd header page */
-		  if (munmap ((void *) virtual_base, virtual_size) < 0)
-		    clib_unix_warning ("munmap");
-		  /* Reset the queue-length-address cache */
-		  vec_reset_length (vl_api_queue_cursizes);
-		}
-	      else
-		{
-		  /* Poison the old registration */
-		  memset (*regpp, 0xF3, sizeof (**regpp));
-		  clib_mem_free (*regpp);
-		}
-	      /* no dangling references, please */
-	      *regpp = 0;
-	    }
-	  else
-	    {
-	      svm_pop_heap (oldheap);
-	      clib_warning ("Duplicate free, client index %d",
-			    regpp - am->vl_clients);
-	      oldheap = svm_push_data_heap (svm);
-	    }
-	}
-
-      svm_client_scan_this_region_nolock (am->vlib_rp);
-
-      pthread_mutex_unlock (&svm->mutex);
-      svm_pop_heap (oldheap);
-      for (i = 0; i < vec_len (dead_indices); i++)
-	pool_put_index (am->vl_clients, dead_indices[i]);
-    }
-}
-
-
-static uword
-memclnt_process (vlib_main_t * vm,
-		 vlib_node_runtime_t * node, vlib_frame_t * f)
-{
-  uword mp;
-  vl_shmem_hdr_t *shm;
-  unix_shared_memory_queue_t *q;
-  clib_error_t *e;
-  int rv;
-  api_main_t *am = &api_main;
-  f64 dead_client_scan_time;
-  f64 sleep_time, start_time;
-  f64 vector_rate;
-  clib_error_t *socksvr_api_init (vlib_main_t * vm);
-  clib_error_t *error;
-  int i;
-  vl_socket_args_for_process_t *a;
-  uword event_type;
-  uword *event_data = 0;
-  int private_segment_rotor = 0;
-  svm_region_t *vlib_rp;
-  f64 now;
-
-  vlib_set_queue_signal_callback (vm, memclnt_queue_callback);
-
-  if ((rv = memory_api_init (am->region_name)) < 0)
-    {
-      clib_warning ("memory_api_init returned %d, quitting...", rv);
-      return 0;
-    }
-
-  if ((error = socksvr_api_init (vm)))
-    {
-      clib_error_report (error);
-      clib_warning ("socksvr_api_init failed, quitting...");
-      return 0;
-    }
-
-  shm = am->shmem_hdr;
-  ASSERT (shm);
-  q = shm->vl_input_queue;
-  ASSERT (q);
-  /* Make a note so we can always find the primary region easily */
-  am->vlib_primary_rp = am->vlib_rp;
-
-  e = vlib_call_init_exit_functions
-    (vm, vm->api_init_function_registrations, 1 /* call_once */ );
-  if (e)
-    clib_error_report (e);
-
-  sleep_time = 10.0;
-  dead_client_scan_time = vlib_time_now (vm) + 10.0;
-
-  /*
-   * Send plugin message range messages for each plugin we loaded
-   */
-  for (i = 0; i < vec_len (am->msg_ranges); i++)
-    {
-      vl_api_msg_range_t *rp = am->msg_ranges + i;
-      send_one_plugin_msg_ids_msg (rp->name, rp->first_msg_id,
-				   rp->last_msg_id);
-    }
-
-  /*
-   * Save the api message table snapshot, if configured
-   */
-  if (am->save_msg_table_filename)
-    {
-      int fd, rv;
-      u8 *chroot_file;
-      u8 *serialized_message_table;
-
-      /*
-       * Snapshoot the api message table.
-       */
-      if (strstr ((char *) am->save_msg_table_filename, "..")
-	  || index ((char *) am->save_msg_table_filename, '/'))
-	{
-	  clib_warning ("illegal save-message-table filename '%s'",
-			am->save_msg_table_filename);
-	  goto skip_save;
-	}
-
-      chroot_file = format (0, "/tmp/%s%c", am->save_msg_table_filename, 0);
-
-      fd = creat ((char *) chroot_file, 0644);
-
-      if (fd < 0)
-	{
-	  clib_unix_warning ("creat");
-	  goto skip_save;
-	}
-
-      serialized_message_table = vl_api_serialize_message_table (am, 0);
-
-      rv = write (fd, serialized_message_table,
-		  vec_len (serialized_message_table));
-
-      if (rv != vec_len (serialized_message_table))
-	clib_unix_warning ("write");
-
-      rv = close (fd);
-      if (rv < 0)
-	clib_unix_warning ("close");
-
-      vec_free (chroot_file);
-      vec_free (serialized_message_table);
-    }
-
-skip_save:
-
-  /* $$$ pay attention to frame size, control CPU usage */
-  while (1)
-    {
-      i8 *headp;
-      int need_broadcast;
-
-      /*
-       * There's a reason for checking the queue before
-       * sleeping. If the vlib application crashes, it's entirely
-       * possible for a client to enqueue a connect request
-       * during the process restart interval.
-       *
-       * Unless some force of physics causes the new incarnation
-       * of the application to process the request, the client will
-       * sit and wait for Godot...
-       */
-      vector_rate = vlib_last_vector_length_per_node (vm);
-      start_time = vlib_time_now (vm);
-      while (1)
-	{
-	  pthread_mutex_lock (&q->mutex);
-	  if (q->cursize == 0)
-	    {
-	      vm->api_queue_nonempty = 0;
-	      pthread_mutex_unlock (&q->mutex);
-
-	      if (TRACE_VLIB_MEMORY_QUEUE)
-		{
-                  /* *INDENT-OFF* */
-                  ELOG_TYPE_DECLARE (e) =
-                    {
-                      .format = "q-underflow: len %d",
-                      .format_args = "i4",
-                    };
-                  /* *INDENT-ON* */
-		  struct
-		  {
-		    u32 len;
-		  } *ed;
-		  ed = ELOG_DATA (&vm->elog_main, e);
-		  ed->len = 0;
-		}
-	      sleep_time = 20.0;
-	      break;
-	    }
-
-	  headp = (i8 *) (q->data + sizeof (uword) * q->head);
-	  clib_memcpy (&mp, headp, sizeof (uword));
-
-	  q->head++;
-	  need_broadcast = (q->cursize == q->maxsize / 2);
-	  q->cursize--;
-
-	  if (PREDICT_FALSE (q->head == q->maxsize))
-	    q->head = 0;
-	  pthread_mutex_unlock (&q->mutex);
-	  if (need_broadcast)
-	    (void) pthread_cond_broadcast (&q->condvar);
-
-	  vl_msg_api_handler_with_vm_node (am, (void *) mp, vm, node);
-
-	  /* Allow no more than 10us without a pause */
-	  if (vlib_time_now (vm) > start_time + 10e-6)
-	    {
-	      int index = SLEEP_400_US;
-	      if (vector_rate > 40.0)
-		sleep_time = 400e-6;
-	      else if (vector_rate > 20.0)
-		{
-		  index = SLEEP_200_US;
-		  sleep_time = 200e-6;
-		}
-	      else if (vector_rate >= 1.0)
-		{
-		  index = SLEEP_100_US;
-		  sleep_time = 100e-6;
-		}
-	      else
-		{
-		  index = SLEEP_10_US;
-		  sleep_time = 10e-6;
-		}
-	      vector_rate_histogram[index] += 1;
-	      break;
-	    }
-	}
-
-      /*
-       * see if we have any private api shared-memory segments
-       * If so, push required context variables, and process
-       * a message.
-       */
-      if (PREDICT_FALSE (vec_len (am->vlib_private_rps)))
-	{
-	  unix_shared_memory_queue_t *save_vlib_input_queue = q;
-	  vl_shmem_hdr_t *save_shmem_hdr = am->shmem_hdr;
-	  svm_region_t *save_vlib_rp = am->vlib_rp;
-
-	  vlib_rp = am->vlib_rp = am->vlib_private_rps[private_segment_rotor];
-
-	  am->shmem_hdr = (void *) vlib_rp->user_ctx;
-	  q = am->shmem_hdr->vl_input_queue;
-
-	  pthread_mutex_lock (&q->mutex);
-	  if (q->cursize > 0)
-	    {
-	      headp = (i8 *) (q->data + sizeof (uword) * q->head);
-	      clib_memcpy (&mp, headp, sizeof (uword));
-
-	      q->head++;
-	      need_broadcast = (q->cursize == q->maxsize / 2);
-	      q->cursize--;
-
-	      if (PREDICT_FALSE (q->head == q->maxsize))
-		q->head = 0;
-	      pthread_mutex_unlock (&q->mutex);
-
-	      if (need_broadcast)
-		(void) pthread_cond_broadcast (&q->condvar);
-
-	      vl_msg_api_handler_with_vm_node (am, (void *) mp, vm, node);
-	    }
-	  else
-	    pthread_mutex_unlock (&q->mutex);
-
-	  q = save_vlib_input_queue;
-	  am->shmem_hdr = save_shmem_hdr;
-	  am->vlib_rp = save_vlib_rp;
-
-	  private_segment_rotor++;
-	  if (private_segment_rotor >= vec_len (am->vlib_private_rps))
-	    private_segment_rotor = 0;
-	}
-
-      vlib_process_wait_for_event_or_clock (vm, sleep_time);
-      vec_reset_length (event_data);
-      event_type = vlib_process_get_events (vm, &event_data);
-      now = vlib_time_now (vm);
-
-      switch (event_type)
-	{
-	case QUEUE_SIGNAL_EVENT:
-	  vm->queue_signal_pending = 0;
-	  break;
-
-	case SOCKET_READ_EVENT:
-	  for (i = 0; i < vec_len (event_data); i++)
-	    {
-	      a = pool_elt_at_index (socket_main.process_args, event_data[i]);
-	      vl_api_socket_process_msg (a->clib_file, a->regp,
-					 (i8 *) a->data);
-	      vec_free (a->data);
-	      pool_put (socket_main.process_args, a);
-	    }
-	  break;
-
-	  /* Timeout... */
-	case -1:
-	  break;
-
-	default:
-	  clib_warning ("unknown event type %d", event_type);
-	  break;
-	}
-
-      if (now > dead_client_scan_time)
-	{
-	  dead_client_scan (am, shm, now);
-	  dead_client_scan_time = vlib_time_now (vm) + 10.0;
-	}
-
-      if (TRACE_VLIB_MEMORY_QUEUE)
-	{
-          /* *INDENT-OFF* */
-          ELOG_TYPE_DECLARE (e) = {
-            .format = "q-awake: len %d",
-            .format_args = "i4",
-          };
-          /* *INDENT-ON* */
-	  struct
-	  {
-	    u32 len;
-	  } *ed;
-	  ed = ELOG_DATA (&vm->elog_main, e);
-	  ed->len = q->cursize;
-	}
-    }
-
-  return 0;
-}
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (memclnt_node) =
-{
-  .function = memclnt_process,
-  .type = VLIB_NODE_TYPE_PROCESS,
-  .name = "api-rx-from-ring",
-  .state = VLIB_NODE_STATE_DISABLED,
-};
-/* *INDENT-ON* */
-
-
-static clib_error_t *
-vl_api_show_histogram_command (vlib_main_t * vm,
-			       unformat_input_t * input,
-			       vlib_cli_command_t * cli_cmd)
-{
-  u64 total_counts = 0;
-  int i;
-
-  for (i = 0; i < SLEEP_N_BUCKETS; i++)
-    {
-      total_counts += vector_rate_histogram[i];
-    }
-
-  if (total_counts == 0)
-    {
-      vlib_cli_output (vm, "No control-plane activity.");
-      return 0;
-    }
-
-#define _(n)                                                    \
-    do {                                                        \
-        f64 percent;                                            \
-        percent = ((f64) vector_rate_histogram[SLEEP_##n##_US]) \
-            / (f64) total_counts;                               \
-        percent *= 100.0;                                       \
-        vlib_cli_output (vm, "Sleep %3d us: %llu, %.2f%%",n,    \
-                         vector_rate_histogram[SLEEP_##n##_US], \
-                         percent);                              \
-    } while (0);
-  foreach_histogram_bucket;
-#undef _
-
-  return 0;
-}
-
-/*?
- * Display the binary api sleep-time histogram
-?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (cli_show_api_histogram_command, static) =
-{
-  .path = "show api histogram",
-  .short_help = "show api histogram",
-  .function = vl_api_show_histogram_command,
-};
-/* *INDENT-ON* */
-
-static clib_error_t *
-vl_api_clear_histogram_command (vlib_main_t * vm,
-				unformat_input_t * input,
-				vlib_cli_command_t * cli_cmd)
-{
-  int i;
-
-  for (i = 0; i < SLEEP_N_BUCKETS; i++)
-    vector_rate_histogram[i] = 0;
-  return 0;
-}
-
-/*?
- * Clear the binary api sleep-time histogram
-?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (cli_clear_api_histogram_command, static) =
-{
-  .path = "clear api histogram",
-  .short_help = "clear api histogram",
-  .function = vl_api_clear_histogram_command,
-};
-/* *INDENT-ON* */
-
-volatile int **vl_api_queue_cursizes;
-
-static void
-memclnt_queue_callback (vlib_main_t * vm)
-{
-  int i;
-  api_main_t *am = &api_main;
-
-  if (PREDICT_FALSE (vec_len (vl_api_queue_cursizes) !=
-		     1 + vec_len (am->vlib_private_rps)))
-    {
-      vl_shmem_hdr_t *shmem_hdr = am->shmem_hdr;
-      unix_shared_memory_queue_t *q;
-
-      if (shmem_hdr == 0)
-	return;
-
-      q = shmem_hdr->vl_input_queue;
-      if (q == 0)
-	return;
-
-      vec_add1 (vl_api_queue_cursizes, &q->cursize);
-
-      for (i = 0; i < vec_len (am->vlib_private_rps); i++)
-	{
-	  svm_region_t *vlib_rp = am->vlib_private_rps[i];
-
-	  shmem_hdr = (void *) vlib_rp->user_ctx;
-	  q = shmem_hdr->vl_input_queue;
-	  vec_add1 (vl_api_queue_cursizes, &q->cursize);
-	}
-    }
-
-  for (i = 0; i < vec_len (vl_api_queue_cursizes); i++)
-    {
-      if (*vl_api_queue_cursizes[i])
-	{
-	  vm->queue_signal_pending = 1;
-	  vm->api_queue_nonempty = 1;
-	  vlib_process_signal_event (vm, memclnt_node.index,
-				     /* event_type */ QUEUE_SIGNAL_EVENT,
-				     /* event_data */ 0);
-	  break;
-	}
-    }
-}
-
-void
-vl_enable_disable_memory_api (vlib_main_t * vm, int enable)
-{
-  vlib_node_set_state (vm, memclnt_node.index,
-		       (enable
-			? VLIB_NODE_STATE_POLLING
-			: VLIB_NODE_STATE_DISABLED));
-}
-
-static uword
-api_rx_from_node (vlib_main_t * vm,
-		  vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
-  uword n_packets = frame->n_vectors;
-  uword n_left_from;
-  u32 *from;
-  static u8 *long_msg;
-
-  vec_validate (long_msg, 4095);
-  n_left_from = frame->n_vectors;
-  from = vlib_frame_args (frame);
-
-  while (n_left_from > 0)
-    {
-      u32 bi0;
-      vlib_buffer_t *b0;
-      void *msg;
-      uword msg_len;
-
-      bi0 = from[0];
-      b0 = vlib_get_buffer (vm, bi0);
-      from += 1;
-      n_left_from -= 1;
-
-      msg = b0->data + b0->current_data;
-      msg_len = b0->current_length;
-      if (b0->flags & VLIB_BUFFER_NEXT_PRESENT)
-	{
-	  ASSERT (long_msg != 0);
-	  _vec_len (long_msg) = 0;
-	  vec_add (long_msg, msg, msg_len);
-	  while (b0->flags & VLIB_BUFFER_NEXT_PRESENT)
-	    {
-	      b0 = vlib_get_buffer (vm, b0->next_buffer);
-	      msg = b0->data + b0->current_data;
-	      msg_len = b0->current_length;
-	      vec_add (long_msg, msg, msg_len);
-	    }
-	  msg = long_msg;
-	}
-      vl_msg_api_handler_no_trace_no_free (msg);
-    }
-
-  /* Free what we've been given. */
-  vlib_buffer_free (vm, vlib_frame_args (frame), n_packets);
-
-  return n_packets;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (api_rx_from_node_node,static) = {
-    .function = api_rx_from_node,
-    .type = VLIB_NODE_TYPE_INTERNAL,
-    .vector_size = 4,
-    .name = "api-rx-from-node",
-};
-/* *INDENT-ON* */
-
-static clib_error_t *
-setup_memclnt_exit (vlib_main_t * vm)
-{
-  atexit (vl_unmap_shmem);
-  return 0;
-}
-
-VLIB_INIT_FUNCTION (setup_memclnt_exit);
-
-u8 *
-format_api_message_rings (u8 * s, va_list * args)
-{
-  api_main_t *am = va_arg (*args, api_main_t *);
-  vl_shmem_hdr_t *shmem_hdr = va_arg (*args, vl_shmem_hdr_t *);
-  int main_segment = va_arg (*args, int);
-  ring_alloc_t *ap;
-  int i;
-
-  if (shmem_hdr == 0)
-    return format (s, "%8s %8s %8s %8s %8s\n",
-		   "Owner", "Size", "Nitems", "Hits", "Misses");
-
-  ap = shmem_hdr->vl_rings;
-
-  for (i = 0; i < vec_len (shmem_hdr->vl_rings); i++)
-    {
-      s = format (s, "%8s %8d %8d %8d %8d\n",
-		  "vlib", ap->size, ap->nitems, ap->hits, ap->misses);
-      ap++;
-    }
-
-  ap = shmem_hdr->client_rings;
-
-  for (i = 0; i < vec_len (shmem_hdr->client_rings); i++)
-    {
-      s = format (s, "%8s %8d %8d %8d %8d\n",
-		  "clnt", ap->size, ap->nitems, ap->hits, ap->misses);
-      ap++;
-    }
-
-  if (main_segment)
-    {
-      s = format (s, "%d ring miss fallback allocations\n", am->ring_misses);
-      s = format
-	(s,
-	 "%d application restarts, %d reclaimed msgs, %d garbage collects\n",
-	 shmem_hdr->application_restarts, shmem_hdr->restart_reclaims,
-	 shmem_hdr->garbage_collects);
-    }
-  return s;
-}
-
-
-static clib_error_t *
-vl_api_ring_command (vlib_main_t * vm,
-		     unformat_input_t * input, vlib_cli_command_t * cli_cmd)
-{
-  int i;
-  vl_shmem_hdr_t *shmem_hdr;
-  api_main_t *am = &api_main;
-
-  /* First, dump the primary region rings.. */
-
-  if (am->vlib_primary_rp == 0 || am->vlib_primary_rp->user_ctx == 0)
-    {
-      vlib_cli_output (vm, "Shared memory segment not initialized...\n");
-      return 0;
-    }
-
-  shmem_hdr = (void *) am->vlib_primary_rp->user_ctx;
-
-  vlib_cli_output (vm, "Main API segment rings:");
-
-  vlib_cli_output (vm, "%U", format_api_message_rings, am,
-		   0 /* print header */ , 0 /* notused */ );
-
-  vlib_cli_output (vm, "%U", format_api_message_rings, am,
-		   shmem_hdr, 1 /* main segment */ );
-
-  for (i = 0; i < vec_len (am->vlib_private_rps); i++)
-    {
-      svm_region_t *vlib_rp = am->vlib_private_rps[i];
-      shmem_hdr = (void *) vlib_rp->user_ctx;
-      vl_api_registration_t **regpp;
-      vl_api_registration_t *regp = 0;
-
-      /* For horizontal scaling, add a hash table... */
-      /* *INDENT-OFF* */
-      pool_foreach (regpp, am->vl_clients,
-      ({
-        regp = *regpp;
-        if (regp && regp->vlib_rp == vlib_rp)
-          {
-            vlib_cli_output (vm, "%s segment rings:", regp->name);
-            goto found;
-          }
-      }));
-      vlib_cli_output (vm, "regp %llx not found?", regp);
-      continue;
-      /* *INDENT-ON* */
-    found:
-      vlib_cli_output (vm, "%U", format_api_message_rings, am,
-		       0 /* print header */ , 0 /* notused */ );
-      vlib_cli_output (vm, "%U", format_api_message_rings, am,
-		       shmem_hdr, 0 /* main segment */ );
-    }
-
-  return 0;
-}
-
-void dump_socket_clients (vlib_main_t * vm, api_main_t * am)
-  __attribute__ ((weak));
-
-void
-dump_socket_clients (vlib_main_t * vm, api_main_t * am)
-{
-}
-
-static clib_error_t *
-vl_api_client_command (vlib_main_t * vm,
-		       unformat_input_t * input, vlib_cli_command_t * cli_cmd)
-{
-  vl_api_registration_t **regpp, *regp;
-  unix_shared_memory_queue_t *q;
-  char *health;
-  api_main_t *am = &api_main;
-  u32 *confused_indices = 0;
-
-  if (!pool_elts (am->vl_clients))
-    goto socket_clients;
-  vlib_cli_output (vm, "Shared memory clients");
-  vlib_cli_output (vm, "%20s %8s %14s %18s %s",
-		   "Name", "PID", "Queue Length", "Queue VA", "Health");
-
-  /* *INDENT-OFF* */
-  pool_foreach (regpp, am->vl_clients,
-  ({
-    regp = *regpp;
-
-    if (regp)
-      {
-        if (regp->unanswered_pings > 0)
-          health = "questionable";
-        else
-          health = "OK";
-
-        q = regp->vl_input_queue;
-
-        vlib_cli_output (vm, "%20s %8d %14d 0x%016llx %s\n",
-                         regp->name, q->consumer_pid, q->cursize,
-                         q, health);
-      }
-    else
-      {
-        clib_warning ("NULL client registration index %d",
-                      regpp - am->vl_clients);
-        vec_add1 (confused_indices, regpp - am->vl_clients);
-      }
-  }));
-  /* *INDENT-ON* */
-
-  /* This should "never happen," but if it does, fix it... */
-  if (PREDICT_FALSE (vec_len (confused_indices) > 0))
-    {
-      int i;
-      for (i = 0; i < vec_len (confused_indices); i++)
-	{
-	  pool_put_index (am->vl_clients, confused_indices[i]);
-	}
-    }
-  vec_free (confused_indices);
-
-  if (am->missing_clients)
-    vlib_cli_output (vm, "%u messages with missing clients",
-		     am->missing_clients);
-socket_clients:
-  dump_socket_clients (vm, am);
-
-  return 0;
-}
-
-static clib_error_t *
-vl_api_status_command (vlib_main_t * vm,
-		       unformat_input_t * input, vlib_cli_command_t * cli_cmd)
-{
-  api_main_t *am = &api_main;
-
-  // check if rx_trace and tx_trace are not null pointers
-
-  if (am->rx_trace == 0)
-    {
-      vlib_cli_output (vm, "RX Trace disabled\n");
-    }
-  else
-    {
-      if (am->rx_trace->enabled == 0)
-	vlib_cli_output (vm, "RX Trace disabled\n");
-      else
-	vlib_cli_output (vm, "RX Trace enabled\n");
-    }
-
-  if (am->tx_trace == 0)
-    {
-      vlib_cli_output (vm, "TX Trace disabled\n");
-    }
-  else
-    {
-      if (am->tx_trace->enabled == 0)
-	vlib_cli_output (vm, "TX Trace disabled\n");
-      else
-	vlib_cli_output (vm, "TX Trace enabled\n");
-    }
-
-  return 0;
-}
-
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (cli_show_api_command, static) =
-{
-  .path = "show api",
-  .short_help = "Show API information",
-};
-/* *INDENT-ON* */
-
-/*?
- * Display binary api message allocation ring statistics
-?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (cli_show_api_ring_command, static) =
-{
-  .path = "show api ring-stats",
-  .short_help = "Message ring statistics",
-  .function = vl_api_ring_command,
-};
-/* *INDENT-ON* */
-
-/*?
- * Display current api client connections
-?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (cli_show_api_clients_command, static) =
-{
-  .path = "show api clients",
-  .short_help = "Client information",
-  .function = vl_api_client_command,
-};
-/* *INDENT-ON* */
-
-/*?
- * Display the current api message tracing status
-?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (cli_show_api_status_command, static) =
-{
-  .path = "show api trace-status",
-  .short_help = "Display API trace status",
-  .function = vl_api_status_command,
-};
-/* *INDENT-ON* */
-
-static clib_error_t *
-vl_api_message_table_command (vlib_main_t * vm,
-			      unformat_input_t * input,
-			      vlib_cli_command_t * cli_cmd)
-{
-  api_main_t *am = &api_main;
-  int i;
-  int verbose = 0;
-
-  if (unformat (input, "verbose"))
-    verbose = 1;
-
-
-  if (verbose == 0)
-    vlib_cli_output (vm, "%-4s %s", "ID", "Name");
-  else
-    vlib_cli_output (vm, "%-4s %-40s %6s %7s", "ID", "Name", "Bounce",
-		     "MP-safe");
-
-  for (i = 1; i < vec_len (am->msg_names); i++)
-    {
-      if (verbose == 0)
-	{
-	  vlib_cli_output (vm, "%-4d %s", i,
-			   am->msg_names[i] ? am->msg_names[i] :
-			   "  [no handler]");
-	}
-      else
-	{
-	  vlib_cli_output (vm, "%-4d %-40s %6d %7d", i,
-			   am->msg_names[i] ? am->msg_names[i] :
-			   "  [no handler]", am->message_bounce[i],
-			   am->is_mp_safe[i]);
-	}
-    }
-
-  return 0;
-}
-
-/*?
- * Display the current api message decode tables
-?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (cli_show_api_message_table_command, static) =
-{
-  .path = "show api message-table",
-  .short_help = "Message Table",
-  .function = vl_api_message_table_command,
-};
-/* *INDENT-ON* */
-
-static clib_error_t *
-vl_api_trace_command (vlib_main_t * vm,
-		      unformat_input_t * input, vlib_cli_command_t * cli_cmd)
-{
-  u32 nitems = 1024;
-  vl_api_trace_which_t which = VL_API_TRACE_RX;
-  api_main_t *am = &api_main;
-
-  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
-    {
-      if (unformat (input, "rx nitems %u", &nitems) || unformat (input, "rx"))
-	goto configure;
-      else if (unformat (input, "tx nitems %u", &nitems)
-	       || unformat (input, "tx"))
-	{
-	  which = VL_API_TRACE_RX;
-	  goto configure;
-	}
-      else if (unformat (input, "on rx"))
-	{
-	  vl_msg_api_trace_onoff (am, VL_API_TRACE_RX, 1);
-	}
-      else if (unformat (input, "on tx"))
-	{
-	  vl_msg_api_trace_onoff (am, VL_API_TRACE_TX, 1);
-	}
-      else if (unformat (input, "on"))
-	{
-	  vl_msg_api_trace_onoff (am, VL_API_TRACE_RX, 1);
-	}
-      else if (unformat (input, "off"))
-	{
-	  vl_msg_api_trace_onoff (am, VL_API_TRACE_RX, 0);
-	  vl_msg_api_trace_onoff (am, VL_API_TRACE_TX, 0);
-	}
-      else if (unformat (input, "free"))
-	{
-	  vl_msg_api_trace_onoff (am, VL_API_TRACE_RX, 0);
-	  vl_msg_api_trace_onoff (am, VL_API_TRACE_TX, 0);
-	  vl_msg_api_trace_free (am, VL_API_TRACE_RX);
-	  vl_msg_api_trace_free (am, VL_API_TRACE_TX);
-	}
-      else if (unformat (input, "debug on"))
-	{
-	  am->msg_print_flag = 1;
-	}
-      else if (unformat (input, "debug off"))
-	{
-	  am->msg_print_flag = 0;
-	}
-      else
-	return clib_error_return (0, "unknown input `%U'",
-				  format_unformat_error, input);
-    }
-  return 0;
-
-configure:
-  if (vl_msg_api_trace_configure (am, which, nitems))
-    {
-      vlib_cli_output (vm, "warning: trace configure error (%d, %d)",
-		       which, nitems);
-    }
-
-  return 0;
-}
-
-/*?
- * Control the binary API trace mechanism
-?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (trace, static) =
-{
-  .path = "set api-trace [on][on tx][on rx][off][free][debug on][debug off]",
-  .short_help = "API trace",
-  .function = vl_api_trace_command,
-};
-/* *INDENT-ON* */
-
-clib_error_t *
-vlibmemory_init (vlib_main_t * vm)
-{
-  api_main_t *am = &api_main;
-  svm_map_region_args_t _a, *a = &_a;
-  clib_error_t *error;
-
-  memset (a, 0, sizeof (*a));
-  a->root_path = am->root_path;
-  a->name = SVM_GLOBAL_REGION_NAME;
-  a->baseva = (am->global_baseva != 0) ?
-    am->global_baseva : SVM_GLOBAL_REGION_BASEVA;
-  a->size = (am->global_size != 0) ? am->global_size : SVM_GLOBAL_REGION_SIZE;
-  a->flags = SVM_FLAGS_NODATA;
-  a->uid = am->api_uid;
-  a->gid = am->api_gid;
-  a->pvt_heap_size =
-    (am->global_pvt_heap_size !=
-     0) ? am->global_pvt_heap_size : SVM_PVT_MHEAP_SIZE;
-
-  svm_region_init_args (a);
-
-  error = vlib_call_init_function (vm, vlibsocket_init);
-
-  return error;
-}
-
-VLIB_INIT_FUNCTION (vlibmemory_init);
-
-void
-vl_set_memory_region_name (const char *name)
-{
-  api_main_t *am = &api_main;
-
-  am->region_name = name;
-}
-
-static int
-range_compare (vl_api_msg_range_t * a0, vl_api_msg_range_t * a1)
-{
-  int len0, len1, clen;
-
-  len0 = vec_len (a0->name);
-  len1 = vec_len (a1->name);
-  clen = len0 < len1 ? len0 : len1;
-  return (strncmp ((char *) a0->name, (char *) a1->name, clen));
-}
-
-static u8 *
-format_api_msg_range (u8 * s, va_list * args)
-{
-  vl_api_msg_range_t *rp = va_arg (*args, vl_api_msg_range_t *);
-
-  if (rp == 0)
-    s = format (s, "%-50s%9s%9s", "Name", "First-ID", "Last-ID");
-  else
-    s = format (s, "%-50s%9d%9d", rp->name, rp->first_msg_id,
-		rp->last_msg_id);
-
-  return s;
-}
-
-static clib_error_t *
-vl_api_show_plugin_command (vlib_main_t * vm,
-			    unformat_input_t * input,
-			    vlib_cli_command_t * cli_cmd)
-{
-  api_main_t *am = &api_main;
-  vl_api_msg_range_t *rp = 0;
-  int i;
-
-  if (vec_len (am->msg_ranges) == 0)
-    {
-      vlib_cli_output (vm, "No plugin API message ranges configured...");
-      return 0;
-    }
-
-  rp = vec_dup (am->msg_ranges);
-
-  vec_sort_with_function (rp, range_compare);
-
-  vlib_cli_output (vm, "Plugin API message ID ranges...\n");
-  vlib_cli_output (vm, "%U", format_api_msg_range, 0 /* header */ );
-
-  for (i = 0; i < vec_len (rp); i++)
-    vlib_cli_output (vm, "%U", format_api_msg_range, rp + i);
-
-  vec_free (rp);
-
-  return 0;
-}
-
-/*?
- * Display the plugin binary API message range table
-?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (cli_show_api_plugin_command, static) =
-{
-  .path = "show api plugin",
-  .short_help = "show api plugin",
-  .function = vl_api_show_plugin_command,
-};
-/* *INDENT-ON* */
-
-static void
-vl_api_rpc_call_t_handler (vl_api_rpc_call_t * mp)
-{
-  vl_api_rpc_call_reply_t *rmp;
-  int (*fp) (void *);
-  i32 rv = 0;
-  vlib_main_t *vm = vlib_get_main ();
-
-  if (mp->function == 0)
-    {
-      rv = -1;
-      clib_warning ("rpc NULL function pointer");
-    }
-
-  else
-    {
-      if (mp->need_barrier_sync)
-	vlib_worker_thread_barrier_sync (vm);
-
-      fp = uword_to_pointer (mp->function, int (*)(void *));
-      rv = fp (mp->data);
-
-      if (mp->need_barrier_sync)
-	vlib_worker_thread_barrier_release (vm);
-    }
-
-  if (mp->send_reply)
-    {
-      unix_shared_memory_queue_t *q =
-	vl_api_client_index_to_input_queue (mp->client_index);
-      if (q)
-	{
-	  rmp = vl_msg_api_alloc_as_if_client (sizeof (*rmp));
-	  rmp->_vl_msg_id = ntohs (VL_API_RPC_CALL_REPLY);
-	  rmp->context = mp->context;
-	  rmp->retval = rv;
-	  vl_msg_api_send_shmem (q, (u8 *) & rmp);
-	}
-    }
-  if (mp->multicast)
-    {
-      clib_warning ("multicast not yet implemented...");
-    }
-}
-
-static void
-vl_api_rpc_call_reply_t_handler (vl_api_rpc_call_reply_t * mp)
-{
-  clib_warning ("unimplemented");
-}
-
-void
-vl_api_send_pending_rpc_requests (vlib_main_t * vm)
-{
-  api_main_t *am = &api_main;
-  vl_shmem_hdr_t *shmem_hdr = am->shmem_hdr;
-  unix_shared_memory_queue_t *q;
-  int i;
-
-  /*
-   * Use the "normal" control-plane mechanism for the main thread.
-   * Well, almost. if the main input queue is full, we cannot
-   * block. Otherwise, we can expect a barrier sync timeout.
-   */
-  q = shmem_hdr->vl_input_queue;
-
-  for (i = 0; i < vec_len (vm->pending_rpc_requests); i++)
-    {
-      while (pthread_mutex_trylock (&q->mutex))
-	vlib_worker_thread_barrier_check ();
-
-      while (PREDICT_FALSE (unix_shared_memory_queue_is_full (q)))
-	{
-	  pthread_mutex_unlock (&q->mutex);
-	  vlib_worker_thread_barrier_check ();
-	  while (pthread_mutex_trylock (&q->mutex))
-	    vlib_worker_thread_barrier_check ();
-	}
-
-      vl_msg_api_send_shmem_nolock (q, (u8 *) (vm->pending_rpc_requests + i));
-
-      pthread_mutex_unlock (&q->mutex);
-    }
-  _vec_len (vm->pending_rpc_requests) = 0;
-}
-
-always_inline void
-vl_api_rpc_call_main_thread_inline (void *fp, u8 * data, u32 data_length,
-				    u8 force_rpc)
-{
-  vl_api_rpc_call_t *mp;
-  vlib_main_t *vm = vlib_get_main ();
-
-  /* Main thread and not a forced RPC: call the function directly */
-  if ((force_rpc == 0) && (vlib_get_thread_index () == 0))
-    {
-      void (*call_fp) (void *);
-
-      vlib_worker_thread_barrier_sync (vm);
-
-      call_fp = fp;
-      call_fp (data);
-
-      vlib_worker_thread_barrier_release (vm);
-      return;
-    }
-
-  /* Otherwise, actually do an RPC */
-  mp = vl_msg_api_alloc_as_if_client (sizeof (*mp) + data_length);
-
-  memset (mp, 0, sizeof (*mp));
-  clib_memcpy (mp->data, data, data_length);
-  mp->_vl_msg_id = ntohs (VL_API_RPC_CALL);
-  mp->function = pointer_to_uword (fp);
-  mp->need_barrier_sync = 1;
-
-  vec_add1 (vm->pending_rpc_requests, (uword) mp);
-}
-
-/*
- * Check if called from worker threads.
- * If so, make rpc call of fp through shmem.
- * Otherwise, call fp directly
- */
-void
-vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length)
-{
-  vl_api_rpc_call_main_thread_inline (fp, data, data_length,	/*force_rpc */
-				      0);
-}
-
-/*
- * Always make rpc call of fp through shmem, useful for calling from threads
- * not setup as worker threads, such as DPDK callback thread
- */
-void
-vl_api_force_rpc_call_main_thread (void *fp, u8 * data, u32 data_length)
-{
-  vl_api_rpc_call_main_thread_inline (fp, data, data_length,	/*force_rpc */
-				      1);
-}
-
-static void
-vl_api_trace_plugin_msg_ids_t_handler (vl_api_trace_plugin_msg_ids_t * mp)
-{
-  api_main_t *am = &api_main;
-  vl_api_msg_range_t *rp;
-  uword *p;
-
-  /* Noop (except for tracing) during normal operation */
-  if (am->replay_in_progress == 0)
-    return;
-
-  p = hash_get_mem (am->msg_range_by_name, mp->plugin_name);
-  if (p == 0)
-    {
-      clib_warning ("WARNING: traced plugin '%s' not in current image",
-		    mp->plugin_name);
-      return;
-    }
-
-  rp = vec_elt_at_index (am->msg_ranges, p[0]);
-  if (rp->first_msg_id != clib_net_to_host_u16 (mp->first_msg_id))
-    {
-      clib_warning ("WARNING: traced plugin '%s' first message id %d not %d",
-		    mp->plugin_name, clib_net_to_host_u16 (mp->first_msg_id),
-		    rp->first_msg_id);
-    }
-
-  if (rp->last_msg_id != clib_net_to_host_u16 (mp->last_msg_id))
-    {
-      clib_warning ("WARNING: traced plugin '%s' last message id %d not %d",
-		    mp->plugin_name, clib_net_to_host_u16 (mp->last_msg_id),
-		    rp->last_msg_id);
-    }
-}
-
-#define foreach_rpc_api_msg                     \
-_(RPC_CALL,rpc_call)                            \
-_(RPC_CALL_REPLY,rpc_call_reply)
-
-#define foreach_plugin_trace_msg		\
-_(TRACE_PLUGIN_MSG_IDS,trace_plugin_msg_ids)
-
-/*
- * Set the rpc callback at our earliest possible convenience.
- * This avoids ordering issues between thread_init() -> start_workers and
- * an init function which we could define here. If we ever intend to use
- * vlib all by itself, we can't create a link-time dependency on
- * an init function here and a typical "call foo_init first"
- * guitar lick.
- */
-
-extern void *rpc_call_main_thread_cb_fn;
-
-static clib_error_t *
-rpc_api_hookup (vlib_main_t * vm)
-{
-  api_main_t *am = &api_main;
-#define _(N,n)                                                  \
-    vl_msg_api_set_handlers(VL_API_##N, #n,                     \
-                           vl_api_##n##_t_handler,              \
-                           vl_noop_handler,                     \
-                           vl_noop_handler,			\
-                           vl_api_##n##_t_print,                \
-                           sizeof(vl_api_##n##_t), 0 /* do not trace */);
-  foreach_rpc_api_msg;
-#undef _
-
-#define _(N,n)                                                  \
-    vl_msg_api_set_handlers(VL_API_##N, #n,                     \
-                           vl_api_##n##_t_handler,              \
-                           vl_noop_handler,                     \
-                           vl_noop_handler,			\
-                           vl_api_##n##_t_print,                \
-                           sizeof(vl_api_##n##_t), 1 /* do trace */);
-  foreach_plugin_trace_msg;
-#undef _
-
-  /* No reason to halt the parade to create a trace record... */
-  am->is_mp_safe[VL_API_TRACE_PLUGIN_MSG_IDS] = 1;
-  rpc_call_main_thread_cb_fn = vl_api_rpc_call_main_thread;
-  return 0;
-}
-
-VLIB_API_INIT_FUNCTION (rpc_api_hookup);
-
-typedef enum
-{
-  DUMP,
-  CUSTOM_DUMP,
-  REPLAY,
-  INITIALIZERS,
-} vl_api_replay_t;
-
-u8 *
-format_vl_msg_api_trace_status (u8 * s, va_list * args)
-{
-  api_main_t *am = va_arg (*args, api_main_t *);
-  vl_api_trace_which_t which = va_arg (*args, vl_api_trace_which_t);
-  vl_api_trace_t *tp;
-  char *trace_name;
-
-  switch (which)
-    {
-    case VL_API_TRACE_TX:
-      tp = am->tx_trace;
-      trace_name = "TX trace";
-      break;
-
-    case VL_API_TRACE_RX:
-      tp = am->rx_trace;
-      trace_name = "RX trace";
-      break;
-
-    default:
-      abort ();
-    }
-
-  if (tp == 0)
-    {
-      s = format (s, "%s: not yet configured.\n", trace_name);
-      return s;
-    }
-
-  s = format (s, "%s: used %d of %d items, %s enabled, %s wrapped\n",
-	      trace_name, vec_len (tp->traces), tp->nitems,
-	      tp->enabled ? "is" : "is not", tp->wrapped ? "has" : "has not");
-  return s;
-}
-
-void vl_msg_api_custom_dump_configure (api_main_t * am)
-  __attribute__ ((weak));
-void
-vl_msg_api_custom_dump_configure (api_main_t * am)
-{
-}
-
-static void
-vl_msg_api_process_file (vlib_main_t * vm, u8 * filename,
-			 u32 first_index, u32 last_index,
-			 vl_api_replay_t which)
-{
-  vl_api_trace_file_header_t *hp;
-  int i, fd;
-  struct stat statb;
-  size_t file_size;
-  u8 *msg;
-  u8 endian_swap_needed = 0;
-  api_main_t *am = &api_main;
-  u8 *tmpbuf = 0;
-  u32 nitems;
-  void **saved_print_handlers = 0;
-
-  fd = open ((char *) filename, O_RDONLY);
-
-  if (fd < 0)
-    {
-      vlib_cli_output (vm, "Couldn't open %s\n", filename);
-      return;
-    }
-
-  if (fstat (fd, &statb) < 0)
-    {
-      vlib_cli_output (vm, "Couldn't stat %s\n", filename);
-      close (fd);
-      return;
-    }
-
-  if (!(statb.st_mode & S_IFREG) || (statb.st_size < sizeof (*hp)))
-    {
-      vlib_cli_output (vm, "File not plausible: %s\n", filename);
-      close (fd);
-      return;
-    }
-
-  file_size = statb.st_size;
-  file_size = (file_size + 4095) & ~(4096);
-
-  hp = mmap (0, file_size, PROT_READ, MAP_PRIVATE, fd, 0);
-
-  if (hp == (vl_api_trace_file_header_t *) MAP_FAILED)
-    {
-      vlib_cli_output (vm, "mmap failed: %s\n", filename);
-      close (fd);
-      return;
-    }
-  close (fd);
-
-  if ((clib_arch_is_little_endian && hp->endian == VL_API_BIG_ENDIAN)
-      || (clib_arch_is_big_endian && hp->endian == VL_API_LITTLE_ENDIAN))
-    endian_swap_needed = 1;
-
-  if (endian_swap_needed)
-    nitems = ntohl (hp->nitems);
-  else
-    nitems = hp->nitems;
-
-  if (last_index == (u32) ~ 0)
-    {
-      last_index = nitems - 1;
-    }
-
-  if (first_index >= nitems || last_index >= nitems)
-    {
-      vlib_cli_output (vm, "Range (%d, %d) outside file range (0, %d)\n",
-		       first_index, last_index, nitems - 1);
-      munmap (hp, file_size);
-      return;
-    }
-  if (hp->wrapped)
-    vlib_cli_output (vm,
-		     "Note: wrapped/incomplete trace, results may vary\n");
-
-  if (which == CUSTOM_DUMP)
-    {
-      saved_print_handlers = (void **) vec_dup (am->msg_print_handlers);
-      vl_msg_api_custom_dump_configure (am);
-    }
-
-
-  msg = (u8 *) (hp + 1);
-
-  for (i = 0; i < first_index; i++)
-    {
-      trace_cfg_t *cfgp;
-      int size;
-      u16 msg_id;
-
-      size = clib_host_to_net_u32 (*(u32 *) msg);
-      msg += sizeof (u32);
-
-      if (clib_arch_is_little_endian)
-	msg_id = ntohs (*((u16 *) msg));
-      else
-	msg_id = *((u16 *) msg);
-
-      cfgp = am->api_trace_cfg + msg_id;
-      if (!cfgp)
-	{
-	  vlib_cli_output (vm, "Ugh: msg id %d no trace config\n", msg_id);
-	  munmap (hp, file_size);
-	  return;
-	}
-      msg += size;
-    }
-
-  if (which == REPLAY)
-    am->replay_in_progress = 1;
-
-  for (; i <= last_index; i++)
-    {
-      trace_cfg_t *cfgp;
-      u16 *msg_idp;
-      u16 msg_id;
-      int size;
-
-      if (which == DUMP)
-	vlib_cli_output (vm, "---------- trace %d -----------\n", i);
-
-      size = clib_host_to_net_u32 (*(u32 *) msg);
-      msg += sizeof (u32);
-
-      if (clib_arch_is_little_endian)
-	msg_id = ntohs (*((u16 *) msg));
-      else
-	msg_id = *((u16 *) msg);
-
-      cfgp = am->api_trace_cfg + msg_id;
-      if (!cfgp)
-	{
-	  vlib_cli_output (vm, "Ugh: msg id %d no trace config\n", msg_id);
-	  munmap (hp, file_size);
-	  vec_free (tmpbuf);
-	  am->replay_in_progress = 0;
-	  return;
-	}
-
-      /* Copy the buffer (from the read-only mmap'ed file) */
-      vec_validate (tmpbuf, size - 1 + sizeof (uword));
-      clib_memcpy (tmpbuf + sizeof (uword), msg, size);
-      memset (tmpbuf, 0xf, sizeof (uword));
-
-      /*
-       * Endian swap if needed. All msg data is supposed to be
-       * in network byte order. All msg handlers are supposed to
-       * know that. The generic message dumpers don't know that.
-       * One could fix apigen, I suppose.
-       */
-      if ((which == DUMP && clib_arch_is_little_endian) || endian_swap_needed)
-	{
-	  void (*endian_fp) (void *);
-	  if (msg_id >= vec_len (am->msg_endian_handlers)
-	      || (am->msg_endian_handlers[msg_id] == 0))
-	    {
-	      vlib_cli_output (vm, "Ugh: msg id %d no endian swap\n", msg_id);
-	      munmap (hp, file_size);
-	      vec_free (tmpbuf);
-	      am->replay_in_progress = 0;
-	      return;
-	    }
-	  endian_fp = am->msg_endian_handlers[msg_id];
-	  (*endian_fp) (tmpbuf + sizeof (uword));
-	}
-
-      /* msg_id always in network byte order */
-      if (clib_arch_is_little_endian)
-	{
-	  msg_idp = (u16 *) (tmpbuf + sizeof (uword));
-	  *msg_idp = msg_id;
-	}
-
-      switch (which)
-	{
-	case CUSTOM_DUMP:
-	case DUMP:
-	  if (msg_id < vec_len (am->msg_print_handlers) &&
-	      am->msg_print_handlers[msg_id])
-	    {
-	      u8 *(*print_fp) (void *, void *);
-
-	      print_fp = (void *) am->msg_print_handlers[msg_id];
-	      (*print_fp) (tmpbuf + sizeof (uword), vm);
-	    }
-	  else
-	    {
-	      vlib_cli_output (vm, "Skipping msg id %d: no print fcn\n",
-			       msg_id);
-	      break;
-	    }
-	  break;
-
-	case INITIALIZERS:
-	  if (msg_id < vec_len (am->msg_print_handlers) &&
-	      am->msg_print_handlers[msg_id])
-	    {
-	      u8 *s;
-	      int j;
-	      u8 *(*print_fp) (void *, void *);
-
-	      print_fp = (void *) am->msg_print_handlers[msg_id];
-
-	      vlib_cli_output (vm, "/*");
-
-	      (*print_fp) (tmpbuf + sizeof (uword), vm);
-	      vlib_cli_output (vm, "*/\n");
-
-	      s = format (0, "static u8 * vl_api_%s_%d[%d] = {",
-			  am->msg_names[msg_id], i,
-			  am->api_trace_cfg[msg_id].size);
-
-	      for (j = 0; j < am->api_trace_cfg[msg_id].size; j++)
-		{
-		  if ((j & 7) == 0)
-		    s = format (s, "\n    ");
-		  s = format (s, "0x%02x,", tmpbuf[sizeof (uword) + j]);
-		}
-	      s = format (s, "\n};\n%c", 0);
-	      vlib_cli_output (vm, (char *) s);
-	      vec_free (s);
-	    }
-	  break;
-
-	case REPLAY:
-	  if (msg_id < vec_len (am->msg_print_handlers) &&
-	      am->msg_print_handlers[msg_id] && cfgp->replay_enable)
-	    {
-	      void (*handler) (void *);
-
-	      handler = (void *) am->msg_handlers[msg_id];
-
-	      if (!am->is_mp_safe[msg_id])
-		vl_msg_api_barrier_sync ();
-	      (*handler) (tmpbuf + sizeof (uword));
-	      if (!am->is_mp_safe[msg_id])
-		vl_msg_api_barrier_release ();
-	    }
-	  else
-	    {
-	      if (cfgp->replay_enable)
-		vlib_cli_output (vm, "Skipping msg id %d: no handler\n",
-				 msg_id);
-	      break;
-	    }
-	  break;
-	}
-
-      _vec_len (tmpbuf) = 0;
-      msg += size;
-    }
-
-  if (saved_print_handlers)
-    {
-      clib_memcpy (am->msg_print_handlers, saved_print_handlers,
-		   vec_len (am->msg_print_handlers) * sizeof (void *));
-      vec_free (saved_print_handlers);
-    }
-
-  munmap (hp, file_size);
-  vec_free (tmpbuf);
-  am->replay_in_progress = 0;
-}
-
-static clib_error_t *
-api_trace_command_fn (vlib_main_t * vm,
-		      unformat_input_t * input, vlib_cli_command_t * cmd)
-{
-  u32 nitems = 256 << 10;
-  api_main_t *am = &api_main;
-  vl_api_trace_which_t which = VL_API_TRACE_RX;
-  u8 *filename;
-  u32 first = 0;
-  u32 last = (u32) ~ 0;
-  FILE *fp;
-  int rv;
-
-  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
-    {
-      if (unformat (input, "on") || unformat (input, "enable"))
-	{
-	  if (unformat (input, "nitems %d", &nitems))
-	    ;
-	  vl_msg_api_trace_configure (am, which, nitems);
-	  vl_msg_api_trace_onoff (am, which, 1 /* on */ );
-	}
-      else if (unformat (input, "off"))
-	{
-	  vl_msg_api_trace_onoff (am, which, 0);
-	}
-      else if (unformat (input, "save %s", &filename))
-	{
-	  u8 *chroot_filename;
-	  if (strstr ((char *) filename, "..")
-	      || index ((char *) filename, '/'))
-	    {
-	      vlib_cli_output (vm, "illegal characters in filename '%s'",
-			       filename);
-	      return 0;
-	    }
-
-	  chroot_filename = format (0, "/tmp/%s%c", filename, 0);
-
-	  vec_free (filename);
-
-	  fp = fopen ((char *) chroot_filename, "w");
-	  if (fp == NULL)
-	    {
-	      vlib_cli_output (vm, "Couldn't create %s\n", chroot_filename);
-	      return 0;
-	    }
-	  rv = vl_msg_api_trace_save (am, which, fp);
-	  fclose (fp);
-	  if (rv == -1)
-	    vlib_cli_output (vm, "API Trace data not present\n");
-	  else if (rv == -2)
-	    vlib_cli_output (vm, "File for writing is closed\n");
-	  else if (rv == -10)
-	    vlib_cli_output (vm, "Error while writing header to file\n");
-	  else if (rv == -11)
-	    vlib_cli_output (vm, "Error while writing trace to file\n");
-	  else if (rv == -12)
-	    vlib_cli_output (vm,
-			     "Error while writing end of buffer trace to file\n");
-	  else if (rv == -13)
-	    vlib_cli_output (vm,
-			     "Error while writing start of buffer trace to file\n");
-	  else if (rv < 0)
-	    vlib_cli_output (vm, "Unkown error while saving: %d", rv);
-	  else
-	    vlib_cli_output (vm, "API trace saved to %s\n", chroot_filename);
-	  vec_free (chroot_filename);
-	}
-      else if (unformat (input, "dump %s", &filename))
-	{
-	  vl_msg_api_process_file (vm, filename, first, last, DUMP);
-	}
-      else if (unformat (input, "custom-dump %s", &filename))
-	{
-	  vl_msg_api_process_file (vm, filename, first, last, CUSTOM_DUMP);
-	}
-      else if (unformat (input, "replay %s", &filename))
-	{
-	  vl_msg_api_process_file (vm, filename, first, last, REPLAY);
-	}
-      else if (unformat (input, "initializers %s", &filename))
-	{
-	  vl_msg_api_process_file (vm, filename, first, last, INITIALIZERS);
-	}
-      else if (unformat (input, "tx"))
-	{
-	  which = VL_API_TRACE_TX;
-	}
-      else if (unformat (input, "first %d", &first))
-	{
-	  ;
-	}
-      else if (unformat (input, "last %d", &last))
-	{
-	  ;
-	}
-      else if (unformat (input, "status"))
-	{
-	  vlib_cli_output (vm, "%U", format_vl_msg_api_trace_status,
-			   am, which);
-	}
-      else if (unformat (input, "free"))
-	{
-	  vl_msg_api_trace_onoff (am, which, 0);
-	  vl_msg_api_trace_free (am, which);
-	}
-      else if (unformat (input, "post-mortem-on"))
-	vl_msg_api_post_mortem_dump_enable_disable (1 /* enable */ );
-      else if (unformat (input, "post-mortem-off"))
-	vl_msg_api_post_mortem_dump_enable_disable (0 /* enable */ );
-      else
-	return clib_error_return (0, "unknown input `%U'",
-				  format_unformat_error, input);
-    }
-  return 0;
-}
-
-/*?
- * Display, replay, or save a binary API trace
-?*/
-
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (api_trace_command, static) =
-{
-  .path = "api trace",
-  .short_help =
-  "api trace [on|off][dump|save|replay <file>][status][free][post-mortem-on]",
-  .function = api_trace_command_fn,
-};
-/* *INDENT-ON* */
-
-static clib_error_t *
-api_config_fn (vlib_main_t * vm, unformat_input_t * input)
-{
-  u32 nitems = 256 << 10;
-  vl_api_trace_which_t which = VL_API_TRACE_RX;
-  api_main_t *am = &api_main;
-
-  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
-    {
-      if (unformat (input, "on") || unformat (input, "enable"))
-	{
-	  if (unformat (input, "nitems %d", &nitems))
-	    ;
-	  vl_msg_api_trace_configure (am, which, nitems);
-	  vl_msg_api_trace_onoff (am, which, 1 /* on */ );
-	  vl_msg_api_post_mortem_dump_enable_disable (1 /* enable */ );
-	}
-      else if (unformat (input, "save-api-table %s",
-			 &am->save_msg_table_filename))
-	;
-      else
-	return clib_error_return (0, "unknown input `%U'",
-				  format_unformat_error, input);
-    }
-  return 0;
-}
-
-/*?
- * This module has three configuration parameters:
- * "on" or "enable" - enables binary api tracing
- * "nitems <nnn>" - sets the size of the circular buffer to <nnn>
- * "save-api-table <filename>" - dumps the API message table to /tmp/<filename>
-?*/
-VLIB_CONFIG_FUNCTION (api_config_fn, "api-trace");
-
-static clib_error_t *
-api_queue_config_fn (vlib_main_t * vm, unformat_input_t * input)
-{
-  api_main_t *am = &api_main;
-  u32 nitems;
-
-  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
-    {
-      if (unformat (input, "length %d", &nitems) ||
-	  (unformat (input, "len %d", &nitems)))
-	{
-	  if (nitems >= 1024)
-	    am->vlib_input_queue_length = nitems;
-	  else
-	    clib_warning ("vlib input queue length %d too small, ignored",
-			  nitems);
-	}
-      else
-	return clib_error_return (0, "unknown input `%U'",
-				  format_unformat_error, input);
-    }
-  return 0;
-}
-
-VLIB_CONFIG_FUNCTION (api_queue_config_fn, "api-queue");
-
-static u8 *
-extract_name (u8 * s)
-{
-  u8 *rv;
-
-  rv = vec_dup (s);
-
-  while (vec_len (rv) && rv[vec_len (rv)] != '_')
-    _vec_len (rv)--;
-
-  rv[vec_len (rv)] = 0;
-
-  return rv;
-}
-
-static u8 *
-extract_crc (u8 * s)
-{
-  int i;
-  u8 *rv;
-
-  rv = vec_dup (s);
-
-  for (i = vec_len (rv) - 1; i >= 0; i--)
-    {
-      if (rv[i] == '_')
-	{
-	  vec_delete (rv, i + 1, 0);
-	  break;
-	}
-    }
-  return rv;
-}
-
-typedef struct
-{
-  u8 *name_and_crc;
-  u8 *name;
-  u8 *crc;
-  u32 msg_index;
-  int which;
-} msg_table_unserialize_t;
-
-static int
-table_id_cmp (void *a1, void *a2)
-{
-  msg_table_unserialize_t *n1 = a1;
-  msg_table_unserialize_t *n2 = a2;
-
-  return (n1->msg_index - n2->msg_index);
-}
-
-static int
-table_name_and_crc_cmp (void *a1, void *a2)
-{
-  msg_table_unserialize_t *n1 = a1;
-  msg_table_unserialize_t *n2 = a2;
-
-  return strcmp ((char *) n1->name_and_crc, (char *) n2->name_and_crc);
-}
-
-static clib_error_t *
-dump_api_table_file_command_fn (vlib_main_t * vm,
-				unformat_input_t * input,
-				vlib_cli_command_t * cmd)
-{
-  u8 *filename = 0;
-  api_main_t *am = &api_main;
-  serialize_main_t _sm, *sm = &_sm;
-  clib_error_t *error;
-  u32 nmsgs;
-  u32 msg_index;
-  u8 *name_and_crc;
-  int compare_current = 0;
-  int numeric_sort = 0;
-  msg_table_unserialize_t *table = 0, *item;
-  u32 i;
-  u32 ndifferences = 0;
-
-  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
-    {
-      if (unformat (input, "file %s", &filename))
-	;
-      else if (unformat (input, "compare-current")
-	       || unformat (input, "compare"))
-	compare_current = 1;
-      else if (unformat (input, "numeric"))
-	numeric_sort = 1;
-      else
-	return clib_error_return (0, "unknown input `%U'",
-				  format_unformat_error, input);
-    }
-
-  if (numeric_sort && compare_current)
-    return clib_error_return
-      (0, "Comparison and numeric sorting are incompatible");
-
-  if (filename == 0)
-    return clib_error_return (0, "File not specified");
-
-  /* Load the serialized message table from the table dump */
-
-  error = unserialize_open_clib_file (sm, (char *) filename);
-
-  if (error)
-    return error;
-
-  unserialize_integer (sm, &nmsgs, sizeof (u32));
-
-  for (i = 0; i < nmsgs; i++)
-    {
-      msg_index = unserialize_likely_small_unsigned_integer (sm);
-      unserialize_cstring (sm, (char **) &name_and_crc);
-      vec_add2 (table, item, 1);
-      item->msg_index = msg_index;
-      item->name_and_crc = name_and_crc;
-      item->name = extract_name (name_and_crc);
-      item->crc = extract_crc (name_and_crc);
-      item->which = 0;		/* file */
-    }
-  serialize_close (sm);
-
-  /* Compare with the current image? */
-  if (compare_current)
-    {
-      /* Append the current message table */
-      u8 *tblv = vl_api_serialize_message_table (am, 0);
-
-      serialize_open_vector (sm, tblv);
-      unserialize_integer (sm, &nmsgs, sizeof (u32));
-
-      for (i = 0; i < nmsgs; i++)
-	{
-	  msg_index = unserialize_likely_small_unsigned_integer (sm);
-	  unserialize_cstring (sm, (char **) &name_and_crc);
-
-	  vec_add2 (table, item, 1);
-	  item->msg_index = msg_index;
-	  item->name_and_crc = name_and_crc;
-	  item->name = extract_name (name_and_crc);
-	  item->crc = extract_crc (name_and_crc);
-	  item->which = 1;	/* current_image */
-	}
-      vec_free (tblv);
-    }
-
-  /* Sort the table. */
-  if (numeric_sort)
-    vec_sort_with_function (table, table_id_cmp);
-  else
-    vec_sort_with_function (table, table_name_and_crc_cmp);
-
-  if (compare_current)
-    {
-      ndifferences = 0;
-
-      /*
-       * In this case, the recovered table will have two entries per
-       * API message. So, if entries i and i+1 match, the message definitions
-       * are identical. Otherwise, the crc is different, or a message is
-       * present in only one of the tables.
-       */
-      vlib_cli_output (vm, "%=60s %s", "Message Name", "Result");
-
-      for (i = 0; i < vec_len (table);)
-	{
-	  /* Last message lonely? */
-	  if (i == vec_len (table) - 1)
-	    {
-	      ndifferences++;
-	      goto last_unique;
-	    }
-
-	  /* Identical pair? */
-	  if (!strncmp
-	      ((char *) table[i].name_and_crc,
-	       (char *) table[i + 1].name_and_crc,
-	       vec_len (table[i].name_and_crc)))
-	    {
-	      i += 2;
-	      continue;
-	    }
-
-	  ndifferences++;
-
-	  /* Only in one of two tables? */
-	  if (strncmp ((char *) table[i].name, (char *) table[i + 1].name,
-		       vec_len (table[i].name)))
-	    {
-	    last_unique:
-	      vlib_cli_output (vm, "%-60s only in %s",
-			       table[i].name, table[i].which ?
-			       "image" : "file");
-	      i++;
-	      continue;
-	    }
-	  /* In both tables, but with different signatures */
-	  vlib_cli_output (vm, "%-60s definition changed", table[i].name);
-	  i += 2;
-	}
-      if (ndifferences == 0)
-	vlib_cli_output (vm, "No api message signature differences found.");
-      else
-	vlib_cli_output (vm, "Found %u api message signature differences",
-			 ndifferences);
-      goto cleanup;
-    }
-
-  /* Dump the table, sorted as shown above */
-  vlib_cli_output (vm, "%=60s %=8s %=10s", "Message name", "MsgID", "CRC");
-
-  for (i = 0; i < vec_len (table); i++)
-    {
-      item = table + i;
-      vlib_cli_output (vm, "%-60s %8u %10s", item->name,
-		       item->msg_index, item->crc);
-    }
-
-cleanup:
-  for (i = 0; i < vec_len (table); i++)
-    {
-      vec_free (table[i].name_and_crc);
-      vec_free (table[i].name);
-      vec_free (table[i].crc);
-    }
-
-  vec_free (table);
-
-  return 0;
-}
-
-/*?
- * Displays a serialized API message decode table, sorted by message name
- *
- * @cliexpar
- * @cliexstart{show api dump file <filename>}
- *                                                Message name    MsgID        CRC
- * accept_session                                                    407   8e2a127e
- * accept_session_reply                                              408   67d8c22a
- * add_node_next                                                     549   e4202993
- * add_node_next_reply                                               550   e89d6eed
- * etc.
- * @cliexend
-?*/
-
-/*?
- * Compares a serialized API message decode table with the current image
- *
- * @cliexpar
- * @cliexstart{show api dump file <filename> compare}
- * ip_add_del_route                                             definition changed
- * ip_table_add_del                                             definition changed
- * l2_macs_event                                                only in image
- * vnet_ip4_fib_counters                                        only in file
- * vnet_ip4_nbr_counters                                        only in file
- * @cliexend
-?*/
-
-/*?
- * Display a serialized API message decode table, compare a saved
- * decode table with the current image, to establish API differences.
- *
-?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (dump_api_table_file, static) =
-{
-  .path = "show api dump",
-  .short_help = "show api dump file <filename> [numeric | compare-current]",
-  .function = dump_api_table_file_command_fn,
-};
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
diff --git a/src/vlibmemory/socksvr_vlib.c b/src/vlibmemory/socket_api.c
index 314e2eb60d3..3d505359d3b 100644
--- a/src/vlibmemory/socksvr_vlib.c
+++ b/src/vlibmemory/socket_api.c
@@ -21,12 +21,11 @@
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <sys/ioctl.h>
-#include <vppinfra/byte_order.h>
-#include <svm/memfd.h>
-
 #include <fcntl.h>
 #include <sys/stat.h>
 
+#include <vppinfra/byte_order.h>
+#include <svm/memfd.h>
 #include <vlibmemory/api.h>
 
 #include <vlibmemory/vl_memory_msg_enum.h>
@@ -46,8 +45,10 @@
 #include <vlibmemory/vl_memory_api_h.h>
 #undef vl_endianfun
 
+socket_main_t socket_main;
+
 void
-dump_socket_clients (vlib_main_t * vm, api_main_t * am)
+vl_sock_api_dump_clients (vlib_main_t * vm, api_main_t * am)
 {
   vl_api_registration_t *reg;
   socket_main_t *sm = &socket_main;
@@ -117,7 +118,7 @@ vl_socket_api_send (vl_api_registration_t * rp, u8 * elem)
 }
 
 void
-vl_free_socket_registration_index (u32 pool_index)
+vl_socket_free_registration_index (u32 pool_index)
 {
   int i;
   vl_api_registration_t *rp;
@@ -141,7 +142,7 @@ vl_free_socket_registration_index (u32 pool_index)
 }
 
 void
-vl_api_socket_process_msg (clib_file_t * uf, vl_api_registration_t * rp,
+vl_socket_process_api_msg (clib_file_t * uf, vl_api_registration_t * rp,
 			   i8 * input_v)
 {
   msgbuf_t *mbp = (msgbuf_t *) input_v;
@@ -181,7 +182,7 @@ vl_socket_read_ready (clib_file_t * uf)
       if (!pool_is_free (socket_main.registration_pool, rp))
 	{
 	  u32 index = rp - socket_main.registration_pool;
-	  vl_free_socket_registration_index (index);
+	  vl_socket_free_registration_index (index);
 	}
       else
 	{
@@ -248,7 +249,7 @@ vl_socket_read_ready (clib_file_t * uf)
       a->regp = rp;
       a->data = data_for_process;
 
-      vlib_process_signal_event (vm, memclnt_node.index,
+      vlib_process_signal_event (vm, vl_api_clnt_node.index,
 				 SOCKET_READ_EVENT,
 				 a - socket_main.process_args);
       if (n > (msg_len + sizeof (*mbp)))
@@ -326,7 +327,7 @@ vl_socket_write_ready (clib_file_t * uf)
 #endif
       clib_file_del (fm, uf);
 
-      vl_free_socket_registration_index (rp - socket_main.registration_pool);
+      vl_socket_free_registration_index (rp - socket_main.registration_pool);
       return 0;
     }
 
@@ -344,7 +345,7 @@ vl_socket_error_ready (clib_file_t * uf)
 
   rp = pool_elt_at_index (socket_main.registration_pool, uf->private_data);
   clib_file_del (fm, uf);
-  vl_free_socket_registration_index (rp - socket_main.registration_pool);
+  vl_socket_free_registration_index (rp - socket_main.registration_pool);
 
   return 0;
 }
@@ -417,7 +418,7 @@ vl_api_sockclnt_create_t_handler (vl_api_sockclnt_create_t * mp)
   rp->context = mp->context;
   rp->response = htonl (rv);
 
-  vl_msg_api_send (regp, (u8 *) rp);
+  vl_api_send_msg (regp, (u8 *) rp);
 }
 
 /*
@@ -438,11 +439,11 @@ vl_api_sockclnt_delete_t_handler (vl_api_sockclnt_delete_t * mp)
       rp->handle = mp->handle;
       rp->response = htonl (1);
 
-      vl_msg_api_send (regp, (u8 *) rp);
+      vl_api_send_msg (regp, (u8 *) rp);
 
       clib_file_del (&file_main, file_main.file_pool + regp->clib_file_index);
 
-      vl_free_socket_registration_index (mp->index);
+      vl_socket_free_registration_index (mp->index);
     }
   else
     {
@@ -597,7 +598,7 @@ reply:
   rmp->context = mp->context;
   rmp->retval = htonl (rv);
 
-  vl_msg_api_send (regp, (u8 *) rmp);
+  vl_api_send_msg (regp, (u8 *) rmp);
 
   if (rv != 0)
     return;
@@ -652,7 +653,7 @@ reply:
   rmp->context = mp->context;
   rmp->retval = htonl (rv);
 
-  vl_msg_api_send (regp, (u8 *) rmp);
+  vl_api_send_msg (regp, (u8 *) rmp);
 
   if (rv != 0)
     return;
@@ -675,7 +676,7 @@ _(SOCK_INIT_SHM, sock_init_shm) 			\
 _(MEMFD_SEGMENT_CREATE, memfd_segment_create)
 
 clib_error_t *
-socksvr_api_init (vlib_main_t * vm)
+vl_sock_api_init (vlib_main_t * vm)
 {
   clib_file_main_t *fm = &file_main;
   clib_file_t template = { 0 };
@@ -752,7 +753,7 @@ socket_exit (vlib_main_t * vm)
         pool_foreach (rp, sm->registration_pool, ({
             clib_file_del (fm, fm->file_pool + rp->clib_file_index);
             index = rp->vl_api_registration_pool_index;
-            vl_free_socket_registration_index (index);
+            vl_socket_free_registration_index (index);
         }));
 /* *INDENT-ON* */
     }
diff --git a/src/vlibmemory/socket_api.h b/src/vlibmemory/socket_api.h
new file mode 100644
index 00000000000..69610e8997a
--- /dev/null
+++ b/src/vlibmemory/socket_api.h
@@ -0,0 +1,88 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2018 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 SRC_VLIBMEMORY_SOCKET_API_H_
+#define SRC_VLIBMEMORY_SOCKET_API_H_
+
+#include <vlibapi/api_common.h>
+#include <vppinfra/file.h>
+
+#define API_SOCKET_FILE "/run/vpp-api.sock"
+
+typedef struct
+{
+  clib_file_t *clib_file;
+  vl_api_registration_t *regp;
+  u8 *data;
+} vl_socket_args_for_process_t;
+
+typedef struct
+{
+  /* Server port number */
+  u8 *socket_name;
+
+  /* By default, localhost... */
+  u32 bind_address;
+
+  /*
+   * (listen, server, client) registrations. Shared memory
+   * registrations are in shared memory
+   */
+  vl_api_registration_t *registration_pool;
+  /*
+   * Chain-drag variables, so message API handlers
+   * (generally) don't know whether they're talking to a socket
+   * or to a shared-memory connection.
+   */
+  vl_api_registration_t *current_rp;
+  clib_file_t *current_uf;
+  /* One input buffer, shared across all sockets */
+  i8 *input_buffer;
+
+  /* pool of process args for socket clients */
+  vl_socket_args_for_process_t *process_args;
+
+  /* Listen for API connections here */
+  clib_socket_t socksvr_listen_socket;
+} socket_main_t;
+
+extern socket_main_t socket_main;
+
+void vl_socket_free_registration_index (u32 pool_index);
+clib_error_t *vl_socket_read_ready (struct clib_file *uf);
+void vl_socket_add_pending_output (struct clib_file *uf,
+				   struct vl_api_registration_ *rp,
+				   u8 * buffer, uword buffer_bytes);
+void vl_socket_add_pending_output_no_flush (struct clib_file *uf,
+					    struct vl_api_registration_ *rp,
+					    u8 * buffer, uword buffer_bytes);
+clib_error_t *vl_socket_write_ready (struct clib_file *uf);
+void vl_socket_api_send (vl_api_registration_t * rp, u8 * elem);
+void vl_socket_process_api_msg (clib_file_t * uf, vl_api_registration_t * rp,
+				i8 * input_v);
+void vl_sock_api_dump_clients (vlib_main_t * vm, api_main_t * am);
+clib_error_t *vl_sock_api_init (vlib_main_t * vm);
+
+#endif /* SRC_VLIBMEMORY_SOCKET_API_H_ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vlibmemory/socket_client.c b/src/vlibmemory/socket_client.c
index d7a9ad5fe86..4567f65e6e1 100644
--- a/src/vlibmemory/socket_client.c
+++ b/src/vlibmemory/socket_client.c
@@ -18,35 +18,12 @@
  */
 
 #include <stdio.h>
-#include <stdlib.h>
-#include <setjmp.h>
-#include <sys/types.h>
 #define __USE_GNU
 #include <sys/socket.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <netinet/in.h>
-#include <signal.h>
-#include <pthread.h>
-#include <unistd.h>
-#include <time.h>
-#include <fcntl.h>
-#include <string.h>
-#include <vppinfra/clib.h>
-#include <vppinfra/vec.h>
-#include <vppinfra/hash.h>
-#include <vppinfra/bitmap.h>
-#include <vppinfra/fifo.h>
-#include <vppinfra/time.h>
-#include <vppinfra/mheap.h>
-#include <vppinfra/heap.h>
-#include <vppinfra/pool.h>
-#include <vppinfra/format.h>
-
-#include <vlib/vlib.h>
-#include <vlib/unix/unix.h>
+
 #include <svm/memfd.h>
-#include <vlibmemory/api.h>
+#include <vlibmemory/socket_client.h>
+#include <vlibmemory/memory_client.h>
 
 #include <vlibmemory/vl_memory_msg_enum.h>
 
diff --git a/src/vlibmemory/socket_client.h b/src/vlibmemory/socket_client.h
new file mode 100644
index 00000000000..10191db6410
--- /dev/null
+++ b/src/vlibmemory/socket_client.h
@@ -0,0 +1,64 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2018 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 SRC_VLIBMEMORY_SOCKET_CLIENT_H_
+#define SRC_VLIBMEMORY_SOCKET_CLIENT_H_
+
+#include <vppinfra/file.h>
+#include <vppinfra/time.h>
+#include <vlibmemory/memory_shared.h>
+
+typedef struct
+{
+  int socket_fd;
+  /* Temporarily disable the connection, so we can keep it around... */
+  int socket_enable;
+
+  clib_socket_t client_socket;
+
+  u32 socket_buffer_size;
+  u8 *socket_tx_buffer;
+  u8 *socket_rx_buffer;
+  u32 socket_tx_nbytes;
+  int control_pings_outstanding;
+
+  u8 *name;
+  clib_time_t clib_time;
+} socket_client_main_t;
+
+extern socket_client_main_t socket_client_main;
+
+#define SOCKET_CLIENT_DEFAULT_BUFFER_SIZE 4096
+
+int vl_socket_client_connect (char *socket_path, char *client_name,
+			      u32 socket_buffer_size);
+void vl_socket_client_disconnect (void);
+int vl_socket_client_read (int wait);
+int vl_socket_client_write (void);
+void vl_socket_client_enable_disable (int enable);
+void *vl_socket_client_msg_alloc (int nbytes);
+int vl_socket_client_init_shm (vl_api_shm_elem_config_t * config);
+
+#endif /* SRC_VLIBMEMORY_SOCKET_CLIENT_H_ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vlibmemory/unix_shared_memory_queue.c b/src/vlibmemory/unix_shared_memory_queue.c
deleted file mode 100644
index 4db4851c111..00000000000
--- a/src/vlibmemory/unix_shared_memory_queue.c
+++ /dev/null
@@ -1,385 +0,0 @@
-/*
- *------------------------------------------------------------------
- * unix_shared_memory_queue.c - unidirectional shared-memory queues
- *
- * Copyright (c) 2009 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.
- *------------------------------------------------------------------
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <pthread.h>
-#include <vppinfra/mem.h>
-#include <vppinfra/format.h>
-#include <vppinfra/cache.h>
-#include <vlibmemory/unix_shared_memory_queue.h>
-#include <signal.h>
-
-/*
- * unix_shared_memory_queue_init
- *
- * nels = number of elements on the queue
- * elsize = element size, presumably 4 and cacheline-size will
- *          be popular choices.
- * pid   = consumer pid
- *
- * The idea is to call this function in the queue consumer,
- * and e-mail the queue pointer to the producer(s).
- *
- * The vpp process / main thread allocates one of these
- * at startup; its main input queue. The vpp main input queue
- * has a pointer to it in the shared memory segment header.
- *
- * You probably want to be on an svm data heap before calling this
- * function.
- */
-unix_shared_memory_queue_t *
-unix_shared_memory_queue_init (int nels,
-			       int elsize,
-			       int consumer_pid,
-			       int signal_when_queue_non_empty)
-{
-  unix_shared_memory_queue_t *q;
-  pthread_mutexattr_t attr;
-  pthread_condattr_t cattr;
-
-  q = clib_mem_alloc_aligned (sizeof (unix_shared_memory_queue_t)
-			      + nels * elsize, CLIB_CACHE_LINE_BYTES);
-  memset (q, 0, sizeof (*q));
-
-  q->elsize = elsize;
-  q->maxsize = nels;
-  q->consumer_pid = consumer_pid;
-  q->signal_when_queue_non_empty = signal_when_queue_non_empty;
-
-  memset (&attr, 0, sizeof (attr));
-  memset (&cattr, 0, sizeof (cattr));
-
-  if (pthread_mutexattr_init (&attr))
-    clib_unix_warning ("mutexattr_init");
-  if (pthread_mutexattr_setpshared (&attr, PTHREAD_PROCESS_SHARED))
-    clib_unix_warning ("pthread_mutexattr_setpshared");
-  if (pthread_mutex_init (&q->mutex, &attr))
-    clib_unix_warning ("mutex_init");
-  if (pthread_mutexattr_destroy (&attr))
-    clib_unix_warning ("mutexattr_destroy");
-  if (pthread_condattr_init (&cattr))
-    clib_unix_warning ("condattr_init");
-  /* prints funny-looking messages in the Linux target */
-  if (pthread_condattr_setpshared (&cattr, PTHREAD_PROCESS_SHARED))
-    clib_unix_warning ("condattr_setpshared");
-  if (pthread_cond_init (&q->condvar, &cattr))
-    clib_unix_warning ("cond_init1");
-  if (pthread_condattr_destroy (&cattr))
-    clib_unix_warning ("cond_init2");
-
-  return (q);
-}
-
-/*
- * unix_shared_memory_queue_free
- */
-void
-unix_shared_memory_queue_free (unix_shared_memory_queue_t * q)
-{
-  (void) pthread_mutex_destroy (&q->mutex);
-  (void) pthread_cond_destroy (&q->condvar);
-  clib_mem_free (q);
-}
-
-void
-unix_shared_memory_queue_lock (unix_shared_memory_queue_t * q)
-{
-  pthread_mutex_lock (&q->mutex);
-}
-
-void
-unix_shared_memory_queue_unlock (unix_shared_memory_queue_t * q)
-{
-  pthread_mutex_unlock (&q->mutex);
-}
-
-int
-unix_shared_memory_queue_is_full (unix_shared_memory_queue_t * q)
-{
-  return q->cursize == q->maxsize;
-}
-
-/*
- * unix_shared_memory_queue_add_nolock
- */
-int
-unix_shared_memory_queue_add_nolock (unix_shared_memory_queue_t * q,
-				     u8 * elem)
-{
-  i8 *tailp;
-  int need_broadcast = 0;
-
-  if (PREDICT_FALSE (q->cursize == q->maxsize))
-    {
-      while (q->cursize == q->maxsize)
-	{
-	  (void) pthread_cond_wait (&q->condvar, &q->mutex);
-	}
-    }
-
-  tailp = (i8 *) (&q->data[0] + q->elsize * q->tail);
-  clib_memcpy (tailp, elem, q->elsize);
-
-  q->tail++;
-  q->cursize++;
-
-  need_broadcast = (q->cursize == 1);
-
-  if (q->tail == q->maxsize)
-    q->tail = 0;
-
-  if (need_broadcast)
-    {
-      (void) pthread_cond_broadcast (&q->condvar);
-      if (q->signal_when_queue_non_empty)
-	kill (q->consumer_pid, q->signal_when_queue_non_empty);
-    }
-  return 0;
-}
-
-int
-unix_shared_memory_queue_add_raw (unix_shared_memory_queue_t * q, u8 * elem)
-{
-  i8 *tailp;
-
-  if (PREDICT_FALSE (q->cursize == q->maxsize))
-    {
-      while (q->cursize == q->maxsize)
-	;
-    }
-
-  tailp = (i8 *) (&q->data[0] + q->elsize * q->tail);
-  clib_memcpy (tailp, elem, q->elsize);
-
-  q->tail++;
-  q->cursize++;
-
-  if (q->tail == q->maxsize)
-    q->tail = 0;
-  return 0;
-}
-
-
-/*
- * unix_shared_memory_queue_add
- */
-int
-unix_shared_memory_queue_add (unix_shared_memory_queue_t * q,
-			      u8 * elem, int nowait)
-{
-  i8 *tailp;
-  int need_broadcast = 0;
-
-  if (nowait)
-    {
-      /* zero on success */
-      if (pthread_mutex_trylock (&q->mutex))
-	{
-	  return (-1);
-	}
-    }
-  else
-    pthread_mutex_lock (&q->mutex);
-
-  if (PREDICT_FALSE (q->cursize == q->maxsize))
-    {
-      if (nowait)
-	{
-	  pthread_mutex_unlock (&q->mutex);
-	  return (-2);
-	}
-      while (q->cursize == q->maxsize)
-	{
-	  (void) pthread_cond_wait (&q->condvar, &q->mutex);
-	}
-    }
-
-  tailp = (i8 *) (&q->data[0] + q->elsize * q->tail);
-  clib_memcpy (tailp, elem, q->elsize);
-
-  q->tail++;
-  q->cursize++;
-
-  need_broadcast = (q->cursize == 1);
-
-  if (q->tail == q->maxsize)
-    q->tail = 0;
-
-  if (need_broadcast)
-    {
-      (void) pthread_cond_broadcast (&q->condvar);
-      if (q->signal_when_queue_non_empty)
-	kill (q->consumer_pid, q->signal_when_queue_non_empty);
-    }
-  pthread_mutex_unlock (&q->mutex);
-
-  return 0;
-}
-
-/*
- * unix_shared_memory_queue_add2
- */
-int
-unix_shared_memory_queue_add2 (unix_shared_memory_queue_t * q, u8 * elem,
-			       u8 * elem2, int nowait)
-{
-  i8 *tailp;
-  int need_broadcast = 0;
-
-  if (nowait)
-    {
-      /* zero on success */
-      if (pthread_mutex_trylock (&q->mutex))
-	{
-	  return (-1);
-	}
-    }
-  else
-    pthread_mutex_lock (&q->mutex);
-
-  if (PREDICT_FALSE (q->cursize + 1 == q->maxsize))
-    {
-      if (nowait)
-	{
-	  pthread_mutex_unlock (&q->mutex);
-	  return (-2);
-	}
-      while (q->cursize + 1 == q->maxsize)
-	{
-	  (void) pthread_cond_wait (&q->condvar, &q->mutex);
-	}
-    }
-
-  tailp = (i8 *) (&q->data[0] + q->elsize * q->tail);
-  clib_memcpy (tailp, elem, q->elsize);
-
-  q->tail++;
-  q->cursize++;
-
-  if (q->tail == q->maxsize)
-    q->tail = 0;
-
-  need_broadcast = (q->cursize == 1);
-
-  tailp = (i8 *) (&q->data[0] + q->elsize * q->tail);
-  clib_memcpy (tailp, elem2, q->elsize);
-
-  q->tail++;
-  q->cursize++;
-
-  if (q->tail == q->maxsize)
-    q->tail = 0;
-
-  if (need_broadcast)
-    {
-      (void) pthread_cond_broadcast (&q->condvar);
-      if (q->signal_when_queue_non_empty)
-	kill (q->consumer_pid, q->signal_when_queue_non_empty);
-    }
-  pthread_mutex_unlock (&q->mutex);
-
-  return 0;
-}
-
-/*
- * unix_shared_memory_queue_sub
- */
-int
-unix_shared_memory_queue_sub (unix_shared_memory_queue_t * q,
-			      u8 * elem, int nowait)
-{
-  i8 *headp;
-  int need_broadcast = 0;
-
-  if (nowait)
-    {
-      /* zero on success */
-      if (pthread_mutex_trylock (&q->mutex))
-	{
-	  return (-1);
-	}
-    }
-  else
-    pthread_mutex_lock (&q->mutex);
-
-  if (PREDICT_FALSE (q->cursize == 0))
-    {
-      if (nowait)
-	{
-	  pthread_mutex_unlock (&q->mutex);
-	  return (-2);
-	}
-      while (q->cursize == 0)
-	{
-	  (void) pthread_cond_wait (&q->condvar, &q->mutex);
-	}
-    }
-
-  headp = (i8 *) (&q->data[0] + q->elsize * q->head);
-  clib_memcpy (elem, headp, q->elsize);
-
-  q->head++;
-  /* $$$$ JFC shouldn't this be == 0? */
-  if (q->cursize == q->maxsize)
-    need_broadcast = 1;
-
-  q->cursize--;
-
-  if (q->head == q->maxsize)
-    q->head = 0;
-
-  if (need_broadcast)
-    (void) pthread_cond_broadcast (&q->condvar);
-
-  pthread_mutex_unlock (&q->mutex);
-
-  return 0;
-}
-
-int
-unix_shared_memory_queue_sub_raw (unix_shared_memory_queue_t * q, u8 * elem)
-{
-  i8 *headp;
-
-  if (PREDICT_FALSE (q->cursize == 0))
-    {
-      while (q->cursize == 0)
-	;
-    }
-
-  headp = (i8 *) (&q->data[0] + q->elsize * q->head);
-  clib_memcpy (elem, headp, q->elsize);
-
-  q->head++;
-  q->cursize--;
-
-  if (q->head == q->maxsize)
-    q->head = 0;
-  return 0;
-}
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
diff --git a/src/vlibmemory/unix_shared_memory_queue.h b/src/vlibmemory/unix_shared_memory_queue.h
deleted file mode 100644
index 27de3218223..00000000000
--- a/src/vlibmemory/unix_shared_memory_queue.h
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- *------------------------------------------------------------------
- * unix_shared_memory_queue.h - shared-memory queues
- *
- * Copyright (c) 2009 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_unix_shared_memory_queue_h
-#define included_unix_shared_memory_queue_h
-
-#include <pthread.h>
-
-typedef struct _unix_shared_memory_queue
-{
-  pthread_mutex_t mutex;	/* 8 bytes */
-  pthread_cond_t condvar;	/* 8 bytes */
-  int head;
-  int tail;
-  volatile int cursize;
-  int maxsize;
-  int elsize;
-  int consumer_pid;
-  int signal_when_queue_non_empty;
-  char data[0];
-} unix_shared_memory_queue_t;
-
-unix_shared_memory_queue_t *unix_shared_memory_queue_init (int nels,
-							   int elsize,
-							   int consumer_pid,
-							   int
-							   signal_when_queue_non_empty);
-void unix_shared_memory_queue_free (unix_shared_memory_queue_t * q);
-int unix_shared_memory_queue_add (unix_shared_memory_queue_t * q, u8 * elem,
-				  int nowait);
-int unix_shared_memory_queue_add2 (unix_shared_memory_queue_t * q, u8 * elem,
-				   u8 * elem2, int nowait);
-int unix_shared_memory_queue_sub (unix_shared_memory_queue_t * q, u8 * elem,
-				  int nowait);
-void unix_shared_memory_queue_lock (unix_shared_memory_queue_t * q);
-void unix_shared_memory_queue_unlock (unix_shared_memory_queue_t * q);
-int unix_shared_memory_queue_is_full (unix_shared_memory_queue_t * q);
-int unix_shared_memory_queue_add_nolock (unix_shared_memory_queue_t * q,
-					 u8 * elem);
-
-int unix_shared_memory_queue_sub_raw (unix_shared_memory_queue_t * q,
-				      u8 * elem);
-int unix_shared_memory_queue_add_raw (unix_shared_memory_queue_t * q,
-				      u8 * elem);
-
-#endif /* included_unix_shared_memory_queue_h */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
diff --git a/src/vlibmemory/vlib_api.c b/src/vlibmemory/vlib_api.c
new file mode 100644
index 00000000000..9465cfc30d6
--- /dev/null
+++ b/src/vlibmemory/vlib_api.c
@@ -0,0 +1,750 @@
+/*
+ *------------------------------------------------------------------
+ * vlib_api.c VLIB API implementation
+ *
+ * Copyright (c) 2009 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.
+ *------------------------------------------------------------------
+ */
+
+#include <fcntl.h>
+#include <pthread.h>
+#include <vppinfra/vec.h>
+#include <vppinfra/hash.h>
+#include <vppinfra/pool.h>
+#include <vppinfra/format.h>
+#include <vppinfra/byte_order.h>
+#include <vppinfra/elog.h>
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+
+/**
+ * @file
+ * @brief Binary API messaging via shared memory
+ * Low-level, primary provisioning interface
+ */
+/*? %%clicmd:group_label Binary API CLI %% ?*/
+/*? %%syscfg:group_label Binary API configuration %% ?*/
+
+#define TRACE_VLIB_MEMORY_QUEUE 0
+
+#include <vlibmemory/vl_memory_msg_enum.h>	/* enumerate all vlib messages */
+
+#define vl_typedefs		/* define message structures */
+#include <vlibmemory/vl_memory_api_h.h>
+#undef vl_typedefs
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+#define vl_printfun
+#include <vlibmemory/vl_memory_api_h.h>
+#undef vl_printfun
+
+static inline void *
+vl_api_trace_plugin_msg_ids_t_print (vl_api_trace_plugin_msg_ids_t * a,
+				     void *handle)
+{
+  vl_print (handle, "vl_api_trace_plugin_msg_ids: %s first %u last %u\n",
+	    a->plugin_name,
+	    clib_host_to_net_u16 (a->first_msg_id),
+	    clib_host_to_net_u16 (a->last_msg_id));
+  return handle;
+}
+
+/* instantiate all the endian swap functions we know about */
+#define vl_endianfun
+#include <vlibmemory/vl_memory_api_h.h>
+#undef vl_endianfun
+
+u8 *
+vl_api_serialize_message_table (api_main_t * am, u8 * vector)
+{
+  serialize_main_t _sm, *sm = &_sm;
+  hash_pair_t *hp;
+  u32 nmsg = hash_elts (am->msg_index_by_name_and_crc);
+
+  serialize_open_vector (sm, vector);
+
+  /* serialize the count */
+  serialize_integer (sm, nmsg, sizeof (u32));
+
+  /* *INDENT-OFF* */
+  hash_foreach_pair (hp, am->msg_index_by_name_and_crc,
+  ({
+    serialize_likely_small_unsigned_integer (sm, hp->value[0]);
+    serialize_cstring (sm, (char *) hp->key);
+  }));
+  /* *INDENT-ON* */
+
+  return serialize_close_vector (sm);
+}
+
+static void
+vl_api_get_first_msg_id_t_handler (vl_api_get_first_msg_id_t * mp)
+{
+  vl_api_get_first_msg_id_reply_t *rmp;
+  vl_api_registration_t *regp;
+  uword *p;
+  api_main_t *am = &api_main;
+  vl_api_msg_range_t *rp;
+  u8 name[64];
+  u16 first_msg_id = ~0;
+  int rv = -7;			/* VNET_API_ERROR_INVALID_VALUE */
+
+  regp = vl_api_client_index_to_registration (mp->client_index);
+  if (!regp)
+    return;
+
+  if (am->msg_range_by_name == 0)
+    goto out;
+
+  strncpy ((char *) name, (char *) mp->name, ARRAY_LEN (name) - 1);
+
+  p = hash_get_mem (am->msg_range_by_name, name);
+  if (p == 0)
+    goto out;
+
+  rp = vec_elt_at_index (am->msg_ranges, p[0]);
+  first_msg_id = rp->first_msg_id;
+  rv = 0;
+
+out:
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_GET_FIRST_MSG_ID_REPLY);
+  rmp->context = mp->context;
+  rmp->retval = ntohl (rv);
+  rmp->first_msg_id = ntohs (first_msg_id);
+  vl_api_send_msg (regp, (u8 *) rmp);
+}
+
+void
+vl_api_api_versions_t_handler (vl_api_api_versions_t * mp)
+{
+  api_main_t *am = &api_main;
+  vl_api_api_versions_reply_t *rmp;
+  svm_queue_t *q;
+  u32 nmsg = vec_len (am->api_version_list);
+  int msg_size = sizeof (*rmp) + sizeof (rmp->api_versions[0]) * nmsg;
+  int i;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    return;
+
+  rmp = vl_msg_api_alloc (msg_size);
+  memset (rmp, 0, msg_size);
+  rmp->_vl_msg_id = ntohs (VL_API_API_VERSIONS_REPLY);
+
+  /* fill in the message */
+  rmp->context = mp->context;
+  rmp->count = htonl (nmsg);
+
+  for (i = 0; i < nmsg; ++i)
+    {
+      api_version_t *vl = &am->api_version_list[i];
+      rmp->api_versions[i].major = htonl (vl->major);
+      rmp->api_versions[i].minor = htonl (vl->minor);
+      rmp->api_versions[i].patch = htonl (vl->patch);
+      strncpy ((char *) rmp->api_versions[i].name, vl->name, 64 - 1);
+    }
+
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+#define foreach_vlib_api_msg                            \
+_(GET_FIRST_MSG_ID, get_first_msg_id)                   \
+_(API_VERSIONS, api_versions)
+
+/*
+ * vl_api_init
+ */
+static int
+vlib_api_init (void)
+{
+  vl_msg_api_msg_config_t cfg;
+  vl_msg_api_msg_config_t *c = &cfg;
+
+  memset (c, 0, sizeof (*c));
+
+#define _(N,n) do {                                             \
+    c->id = VL_API_##N;                                         \
+    c->name = #n;                                               \
+    c->handler = vl_api_##n##_t_handler;                        \
+    c->cleanup = vl_noop_handler;                               \
+    c->endian = vl_api_##n##_t_endian;                          \
+    c->print = vl_api_##n##_t_print;                            \
+    c->size = sizeof(vl_api_##n##_t);                           \
+    c->traced = 1; /* trace, so these msgs print */             \
+    c->replay = 0; /* don't replay client create/delete msgs */ \
+    c->message_bounce = 0; /* don't bounce this message */	\
+    vl_msg_api_config(c);} while (0);
+
+  foreach_vlib_api_msg;
+#undef _
+
+  return 0;
+}
+
+u64 vector_rate_histogram[SLEEP_N_BUCKETS];
+
+/*
+ * Callback to send ourselves a plugin numbering-space trace msg
+ */
+static void
+send_one_plugin_msg_ids_msg (u8 * name, u16 first_msg_id, u16 last_msg_id)
+{
+  vl_api_trace_plugin_msg_ids_t *mp;
+  api_main_t *am = &api_main;
+  vl_shmem_hdr_t *shmem_hdr = am->shmem_hdr;
+  svm_queue_t *q;
+
+  mp = vl_msg_api_alloc_as_if_client (sizeof (*mp));
+  memset (mp, 0, sizeof (*mp));
+
+  mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_TRACE_PLUGIN_MSG_IDS);
+  strncpy ((char *) mp->plugin_name, (char *) name,
+	   sizeof (mp->plugin_name) - 1);
+  mp->first_msg_id = clib_host_to_net_u16 (first_msg_id);
+  mp->last_msg_id = clib_host_to_net_u16 (last_msg_id);
+
+  q = shmem_hdr->vl_input_queue;
+
+  vl_msg_api_send_shmem (q, (u8 *) & mp);
+}
+
+void
+vl_api_save_msg_table (void)
+{
+  u8 *serialized_message_table;
+  api_main_t *am = &api_main;
+  u8 *chroot_file;
+  int fd, rv;
+
+  /*
+   * Snapshoot the api message table.
+   */
+  if (strstr ((char *) am->save_msg_table_filename, "..")
+      || index ((char *) am->save_msg_table_filename, '/'))
+    {
+      clib_warning ("illegal save-message-table filename '%s'",
+		    am->save_msg_table_filename);
+      return;
+    }
+
+  chroot_file = format (0, "/tmp/%s%c", am->save_msg_table_filename, 0);
+
+  fd = creat ((char *) chroot_file, 0644);
+
+  if (fd < 0)
+    {
+      clib_unix_warning ("creat");
+      return;
+    }
+
+  serialized_message_table = vl_api_serialize_message_table (am, 0);
+
+  rv = write (fd, serialized_message_table,
+	      vec_len (serialized_message_table));
+
+  if (rv != vec_len (serialized_message_table))
+    clib_unix_warning ("write");
+
+  rv = close (fd);
+  if (rv < 0)
+    clib_unix_warning ("close");
+
+  vec_free (chroot_file);
+  vec_free (serialized_message_table);
+}
+
+static uword
+vl_api_clnt_process (vlib_main_t * vm, vlib_node_runtime_t * node,
+		     vlib_frame_t * f)
+{
+  int private_segment_rotor = 0, i, rv;
+  vl_socket_args_for_process_t *a;
+  vl_shmem_hdr_t *shm;
+  svm_queue_t *q;
+  clib_error_t *e;
+  api_main_t *am = &api_main;
+  f64 dead_client_scan_time;
+  f64 sleep_time, start_time;
+  f64 vector_rate;
+  clib_error_t *error;
+  uword event_type;
+  uword *event_data = 0;
+  f64 now;
+
+  if ((rv = vl_mem_api_init (am->region_name)) < 0)
+    {
+      clib_warning ("memory_api_init returned %d, quitting...", rv);
+      return 0;
+    }
+
+  if ((error = vl_sock_api_init (vm)))
+    {
+      clib_error_report (error);
+      clib_warning ("socksvr_api_init failed, quitting...");
+      return 0;
+    }
+
+  if ((rv = vlib_api_init ()) < 0)
+    {
+      clib_warning ("vlib_api_init returned %d, quitting...", rv);
+      return 0;
+    }
+
+  shm = am->shmem_hdr;
+  q = shm->vl_input_queue;
+
+  e = vlib_call_init_exit_functions
+    (vm, vm->api_init_function_registrations, 1 /* call_once */ );
+  if (e)
+    clib_error_report (e);
+
+  sleep_time = 10.0;
+  dead_client_scan_time = vlib_time_now (vm) + 10.0;
+
+  /*
+   * Send plugin message range messages for each plugin we loaded
+   */
+  for (i = 0; i < vec_len (am->msg_ranges); i++)
+    {
+      vl_api_msg_range_t *rp = am->msg_ranges + i;
+      send_one_plugin_msg_ids_msg (rp->name, rp->first_msg_id,
+				   rp->last_msg_id);
+    }
+
+  /*
+   * Save the api message table snapshot, if configured
+   */
+  if (am->save_msg_table_filename)
+    vl_api_save_msg_table ();
+
+  /* $$$ pay attention to frame size, control CPU usage */
+  while (1)
+    {
+      /*
+       * There's a reason for checking the queue before
+       * sleeping. If the vlib application crashes, it's entirely
+       * possible for a client to enqueue a connect request
+       * during the process restart interval.
+       *
+       * Unless some force of physics causes the new incarnation
+       * of the application to process the request, the client will
+       * sit and wait for Godot...
+       */
+      vector_rate = vlib_last_vector_length_per_node (vm);
+      start_time = vlib_time_now (vm);
+      while (1)
+	{
+	  if (vl_mem_api_handle_msg_main (vm, node))
+	    {
+	      vm->api_queue_nonempty = 0;
+	      VL_MEM_API_LOG_Q_LEN ("q-underflow: len %d", 0);
+	      sleep_time = 20.0;
+	      break;
+	    }
+
+	  /* Allow no more than 10us without a pause */
+	  if (vlib_time_now (vm) > start_time + 10e-6)
+	    {
+	      int index = SLEEP_400_US;
+	      if (vector_rate > 40.0)
+		sleep_time = 400e-6;
+	      else if (vector_rate > 20.0)
+		{
+		  index = SLEEP_200_US;
+		  sleep_time = 200e-6;
+		}
+	      else if (vector_rate >= 1.0)
+		{
+		  index = SLEEP_100_US;
+		  sleep_time = 100e-6;
+		}
+	      else
+		{
+		  index = SLEEP_10_US;
+		  sleep_time = 10e-6;
+		}
+	      vector_rate_histogram[index] += 1;
+	      break;
+	    }
+	}
+
+      /*
+       * see if we have any private api shared-memory segments
+       * If so, push required context variables, and process
+       * a message.
+       */
+      if (PREDICT_FALSE (vec_len (am->vlib_private_rps)))
+	{
+	  vl_mem_api_handle_msg_private (vm, node, private_segment_rotor++);
+	  if (private_segment_rotor >= vec_len (am->vlib_private_rps))
+	    private_segment_rotor = 0;
+	}
+
+      vlib_process_wait_for_event_or_clock (vm, sleep_time);
+      vec_reset_length (event_data);
+      event_type = vlib_process_get_events (vm, &event_data);
+      now = vlib_time_now (vm);
+
+      switch (event_type)
+	{
+	case QUEUE_SIGNAL_EVENT:
+	  vm->queue_signal_pending = 0;
+	  VL_MEM_API_LOG_Q_LEN ("q-awake: len %d", q->cursize);
+
+	  break;
+	case SOCKET_READ_EVENT:
+	  for (i = 0; i < vec_len (event_data); i++)
+	    {
+	      a = pool_elt_at_index (socket_main.process_args, event_data[i]);
+	      vl_socket_process_api_msg (a->clib_file, a->regp,
+					 (i8 *) a->data);
+	      vec_free (a->data);
+	      pool_put (socket_main.process_args, a);
+	    }
+	  break;
+
+	  /* Timeout... */
+	case -1:
+	  break;
+
+	default:
+	  clib_warning ("unknown event type %d", event_type);
+	  break;
+	}
+
+      if (now > dead_client_scan_time)
+	{
+	  vl_mem_api_dead_client_scan (am, shm, now);
+	  dead_client_scan_time = vlib_time_now (vm) + 10.0;
+	}
+    }
+
+  return 0;
+}
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (vl_api_clnt_node) =
+{
+  .function = vl_api_clnt_process,
+  .type = VLIB_NODE_TYPE_PROCESS,
+  .name = "api-rx-from-ring",
+  .state = VLIB_NODE_STATE_DISABLED,
+};
+/* *INDENT-ON* */
+
+void
+vl_mem_api_enable_disable (vlib_main_t * vm, int enable)
+{
+  vlib_node_set_state (vm, vl_api_clnt_node.index,
+		       (enable
+			? VLIB_NODE_STATE_POLLING
+			: VLIB_NODE_STATE_DISABLED));
+}
+
+static uword
+api_rx_from_node (vlib_main_t * vm,
+		  vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  uword n_packets = frame->n_vectors;
+  uword n_left_from;
+  u32 *from;
+  static u8 *long_msg;
+
+  vec_validate (long_msg, 4095);
+  n_left_from = frame->n_vectors;
+  from = vlib_frame_args (frame);
+
+  while (n_left_from > 0)
+    {
+      u32 bi0;
+      vlib_buffer_t *b0;
+      void *msg;
+      uword msg_len;
+
+      bi0 = from[0];
+      b0 = vlib_get_buffer (vm, bi0);
+      from += 1;
+      n_left_from -= 1;
+
+      msg = b0->data + b0->current_data;
+      msg_len = b0->current_length;
+      if (b0->flags & VLIB_BUFFER_NEXT_PRESENT)
+	{
+	  ASSERT (long_msg != 0);
+	  _vec_len (long_msg) = 0;
+	  vec_add (long_msg, msg, msg_len);
+	  while (b0->flags & VLIB_BUFFER_NEXT_PRESENT)
+	    {
+	      b0 = vlib_get_buffer (vm, b0->next_buffer);
+	      msg = b0->data + b0->current_data;
+	      msg_len = b0->current_length;
+	      vec_add (long_msg, msg, msg_len);
+	    }
+	  msg = long_msg;
+	}
+      vl_msg_api_handler_no_trace_no_free (msg);
+    }
+
+  /* Free what we've been given. */
+  vlib_buffer_free (vm, vlib_frame_args (frame), n_packets);
+
+  return n_packets;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (api_rx_from_node_node,static) = {
+    .function = api_rx_from_node,
+    .type = VLIB_NODE_TYPE_INTERNAL,
+    .vector_size = 4,
+    .name = "api-rx-from-node",
+};
+/* *INDENT-ON* */
+
+static void
+vl_api_rpc_call_t_handler (vl_api_rpc_call_t * mp)
+{
+  vl_api_rpc_call_reply_t *rmp;
+  int (*fp) (void *);
+  i32 rv = 0;
+  vlib_main_t *vm = vlib_get_main ();
+
+  if (mp->function == 0)
+    {
+      rv = -1;
+      clib_warning ("rpc NULL function pointer");
+    }
+
+  else
+    {
+      if (mp->need_barrier_sync)
+	vlib_worker_thread_barrier_sync (vm);
+
+      fp = uword_to_pointer (mp->function, int (*)(void *));
+      rv = fp (mp->data);
+
+      if (mp->need_barrier_sync)
+	vlib_worker_thread_barrier_release (vm);
+    }
+
+  if (mp->send_reply)
+    {
+      svm_queue_t *q = vl_api_client_index_to_input_queue (mp->client_index);
+      if (q)
+	{
+	  rmp = vl_msg_api_alloc_as_if_client (sizeof (*rmp));
+	  rmp->_vl_msg_id = ntohs (VL_API_RPC_CALL_REPLY);
+	  rmp->context = mp->context;
+	  rmp->retval = rv;
+	  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+	}
+    }
+  if (mp->multicast)
+    {
+      clib_warning ("multicast not yet implemented...");
+    }
+}
+
+static void
+vl_api_rpc_call_reply_t_handler (vl_api_rpc_call_reply_t * mp)
+{
+  clib_warning ("unimplemented");
+}
+
+void
+vl_api_send_pending_rpc_requests (vlib_main_t * vm)
+{
+  api_main_t *am = &api_main;
+  vl_shmem_hdr_t *shmem_hdr = am->shmem_hdr;
+  svm_queue_t *q;
+  int i;
+
+  /*
+   * Use the "normal" control-plane mechanism for the main thread.
+   * Well, almost. if the main input queue is full, we cannot
+   * block. Otherwise, we can expect a barrier sync timeout.
+   */
+  q = shmem_hdr->vl_input_queue;
+
+  for (i = 0; i < vec_len (vm->pending_rpc_requests); i++)
+    {
+      while (pthread_mutex_trylock (&q->mutex))
+	vlib_worker_thread_barrier_check ();
+
+      while (PREDICT_FALSE (svm_queue_is_full (q)))
+	{
+	  pthread_mutex_unlock (&q->mutex);
+	  vlib_worker_thread_barrier_check ();
+	  while (pthread_mutex_trylock (&q->mutex))
+	    vlib_worker_thread_barrier_check ();
+	}
+
+      vl_msg_api_send_shmem_nolock (q, (u8 *) (vm->pending_rpc_requests + i));
+
+      pthread_mutex_unlock (&q->mutex);
+    }
+  _vec_len (vm->pending_rpc_requests) = 0;
+}
+
+always_inline void
+vl_api_rpc_call_main_thread_inline (void *fp, u8 * data, u32 data_length,
+				    u8 force_rpc)
+{
+  vl_api_rpc_call_t *mp;
+  vlib_main_t *vm = vlib_get_main ();
+
+  /* Main thread and not a forced RPC: call the function directly */
+  if ((force_rpc == 0) && (vlib_get_thread_index () == 0))
+    {
+      void (*call_fp) (void *);
+
+      vlib_worker_thread_barrier_sync (vm);
+
+      call_fp = fp;
+      call_fp (data);
+
+      vlib_worker_thread_barrier_release (vm);
+      return;
+    }
+
+  /* Otherwise, actually do an RPC */
+  mp = vl_msg_api_alloc_as_if_client (sizeof (*mp) + data_length);
+
+  memset (mp, 0, sizeof (*mp));
+  clib_memcpy (mp->data, data, data_length);
+  mp->_vl_msg_id = ntohs (VL_API_RPC_CALL);
+  mp->function = pointer_to_uword (fp);
+  mp->need_barrier_sync = 1;
+
+  vec_add1 (vm->pending_rpc_requests, (uword) mp);
+}
+
+/*
+ * Check if called from worker threads.
+ * If so, make rpc call of fp through shmem.
+ * Otherwise, call fp directly
+ */
+void
+vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length)
+{
+  vl_api_rpc_call_main_thread_inline (fp, data, data_length,	/*force_rpc */
+				      0);
+}
+
+/*
+ * Always make rpc call of fp through shmem, useful for calling from threads
+ * not setup as worker threads, such as DPDK callback thread
+ */
+void
+vl_api_force_rpc_call_main_thread (void *fp, u8 * data, u32 data_length)
+{
+  vl_api_rpc_call_main_thread_inline (fp, data, data_length,	/*force_rpc */
+				      1);
+}
+
+static void
+vl_api_trace_plugin_msg_ids_t_handler (vl_api_trace_plugin_msg_ids_t * mp)
+{
+  api_main_t *am = &api_main;
+  vl_api_msg_range_t *rp;
+  uword *p;
+
+  /* Noop (except for tracing) during normal operation */
+  if (am->replay_in_progress == 0)
+    return;
+
+  p = hash_get_mem (am->msg_range_by_name, mp->plugin_name);
+  if (p == 0)
+    {
+      clib_warning ("WARNING: traced plugin '%s' not in current image",
+		    mp->plugin_name);
+      return;
+    }
+
+  rp = vec_elt_at_index (am->msg_ranges, p[0]);
+  if (rp->first_msg_id != clib_net_to_host_u16 (mp->first_msg_id))
+    {
+      clib_warning ("WARNING: traced plugin '%s' first message id %d not %d",
+		    mp->plugin_name, clib_net_to_host_u16 (mp->first_msg_id),
+		    rp->first_msg_id);
+    }
+
+  if (rp->last_msg_id != clib_net_to_host_u16 (mp->last_msg_id))
+    {
+      clib_warning ("WARNING: traced plugin '%s' last message id %d not %d",
+		    mp->plugin_name, clib_net_to_host_u16 (mp->last_msg_id),
+		    rp->last_msg_id);
+    }
+}
+
+#define foreach_rpc_api_msg                     \
+_(RPC_CALL,rpc_call)                            \
+_(RPC_CALL_REPLY,rpc_call_reply)
+
+#define foreach_plugin_trace_msg		\
+_(TRACE_PLUGIN_MSG_IDS,trace_plugin_msg_ids)
+
+/*
+ * Set the rpc callback at our earliest possible convenience.
+ * This avoids ordering issues between thread_init() -> start_workers and
+ * an init function which we could define here. If we ever intend to use
+ * vlib all by itself, we can't create a link-time dependency on
+ * an init function here and a typical "call foo_init first"
+ * guitar lick.
+ */
+
+extern void *rpc_call_main_thread_cb_fn;
+
+static clib_error_t *
+rpc_api_hookup (vlib_main_t * vm)
+{
+  api_main_t *am = &api_main;
+#define _(N,n)                                                  \
+    vl_msg_api_set_handlers(VL_API_##N, #n,                     \
+                           vl_api_##n##_t_handler,              \
+                           vl_noop_handler,                     \
+                           vl_noop_handler,			\
+                           vl_api_##n##_t_print,                \
+                           sizeof(vl_api_##n##_t), 0 /* do not trace */);
+  foreach_rpc_api_msg;
+#undef _
+
+#define _(N,n)                                                  \
+    vl_msg_api_set_handlers(VL_API_##N, #n,                     \
+                           vl_api_##n##_t_handler,              \
+                           vl_noop_handler,                     \
+                           vl_noop_handler,			\
+                           vl_api_##n##_t_print,                \
+                           sizeof(vl_api_##n##_t), 1 /* do trace */);
+  foreach_plugin_trace_msg;
+#undef _
+
+  /* No reason to halt the parade to create a trace record... */
+  am->is_mp_safe[VL_API_TRACE_PLUGIN_MSG_IDS] = 1;
+  rpc_call_main_thread_cb_fn = vl_api_rpc_call_main_thread;
+  return 0;
+}
+
+VLIB_API_INIT_FUNCTION (rpc_api_hookup);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vlibmemory/vlib_api_cli.c b/src/vlibmemory/vlib_api_cli.c
new file mode 100644
index 00000000000..d4d7c1c63dc
--- /dev/null
+++ b/src/vlibmemory/vlib_api_cli.c
@@ -0,0 +1,1209 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2018 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.
+ *------------------------------------------------------------------
+ */
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+
+static clib_error_t *
+vl_api_show_histogram_command (vlib_main_t * vm,
+			       unformat_input_t * input,
+			       vlib_cli_command_t * cli_cmd)
+{
+  u64 total_counts = 0;
+  int i;
+
+  for (i = 0; i < SLEEP_N_BUCKETS; i++)
+    {
+      total_counts += vector_rate_histogram[i];
+    }
+
+  if (total_counts == 0)
+    {
+      vlib_cli_output (vm, "No control-plane activity.");
+      return 0;
+    }
+
+#define _(n)                                                    \
+    do {                                                        \
+        f64 percent;                                            \
+        percent = ((f64) vector_rate_histogram[SLEEP_##n##_US]) \
+            / (f64) total_counts;                               \
+        percent *= 100.0;                                       \
+        vlib_cli_output (vm, "Sleep %3d us: %llu, %.2f%%",n,    \
+                         vector_rate_histogram[SLEEP_##n##_US], \
+                         percent);                              \
+    } while (0);
+  foreach_histogram_bucket;
+#undef _
+
+  return 0;
+}
+
+/*?
+ * Display the binary api sleep-time histogram
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_show_api_histogram_command, static) =
+{
+  .path = "show api histogram",
+  .short_help = "show api histogram",
+  .function = vl_api_show_histogram_command,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+vl_api_clear_histogram_command (vlib_main_t * vm,
+				unformat_input_t * input,
+				vlib_cli_command_t * cli_cmd)
+{
+  int i;
+
+  for (i = 0; i < SLEEP_N_BUCKETS; i++)
+    vector_rate_histogram[i] = 0;
+  return 0;
+}
+
+/*?
+ * Clear the binary api sleep-time histogram
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_clear_api_histogram_command, static) =
+{
+  .path = "clear api histogram",
+  .short_help = "clear api histogram",
+  .function = vl_api_clear_histogram_command,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+vl_api_client_command (vlib_main_t * vm,
+		       unformat_input_t * input, vlib_cli_command_t * cli_cmd)
+{
+  vl_api_registration_t **regpp, *regp;
+  svm_queue_t *q;
+  char *health;
+  api_main_t *am = &api_main;
+  u32 *confused_indices = 0;
+
+  if (!pool_elts (am->vl_clients))
+    goto socket_clients;
+  vlib_cli_output (vm, "Shared memory clients");
+  vlib_cli_output (vm, "%20s %8s %14s %18s %s",
+		   "Name", "PID", "Queue Length", "Queue VA", "Health");
+
+  /* *INDENT-OFF* */
+  pool_foreach (regpp, am->vl_clients,
+  ({
+    regp = *regpp;
+
+    if (regp)
+      {
+        if (regp->unanswered_pings > 0)
+          health = "questionable";
+        else
+          health = "OK";
+
+        q = regp->vl_input_queue;
+
+        vlib_cli_output (vm, "%20s %8d %14d 0x%016llx %s\n",
+                         regp->name, q->consumer_pid, q->cursize,
+                         q, health);
+      }
+    else
+      {
+        clib_warning ("NULL client registration index %d",
+                      regpp - am->vl_clients);
+        vec_add1 (confused_indices, regpp - am->vl_clients);
+      }
+  }));
+  /* *INDENT-ON* */
+
+  /* This should "never happen," but if it does, fix it... */
+  if (PREDICT_FALSE (vec_len (confused_indices) > 0))
+    {
+      int i;
+      for (i = 0; i < vec_len (confused_indices); i++)
+	{
+	  pool_put_index (am->vl_clients, confused_indices[i]);
+	}
+    }
+  vec_free (confused_indices);
+
+  if (am->missing_clients)
+    vlib_cli_output (vm, "%u messages with missing clients",
+		     am->missing_clients);
+socket_clients:
+  vl_sock_api_dump_clients (vm, am);
+
+  return 0;
+}
+
+static clib_error_t *
+vl_api_status_command (vlib_main_t * vm,
+		       unformat_input_t * input, vlib_cli_command_t * cli_cmd)
+{
+  api_main_t *am = &api_main;
+
+  /* check if rx_trace and tx_trace are not null pointers */
+  if (am->rx_trace == 0)
+    {
+      vlib_cli_output (vm, "RX Trace disabled\n");
+    }
+  else
+    {
+      if (am->rx_trace->enabled == 0)
+	vlib_cli_output (vm, "RX Trace disabled\n");
+      else
+	vlib_cli_output (vm, "RX Trace enabled\n");
+    }
+
+  if (am->tx_trace == 0)
+    {
+      vlib_cli_output (vm, "TX Trace disabled\n");
+    }
+  else
+    {
+      if (am->tx_trace->enabled == 0)
+	vlib_cli_output (vm, "TX Trace disabled\n");
+      else
+	vlib_cli_output (vm, "TX Trace enabled\n");
+    }
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_show_api_command, static) =
+{
+  .path = "show api",
+  .short_help = "Show API information",
+};
+/* *INDENT-ON* */
+
+/*?
+ * Display current api client connections
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_show_api_clients_command, static) =
+{
+  .path = "show api clients",
+  .short_help = "Client information",
+  .function = vl_api_client_command,
+};
+/* *INDENT-ON* */
+
+/*?
+ * Display the current api message tracing status
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_show_api_status_command, static) =
+{
+  .path = "show api trace-status",
+  .short_help = "Display API trace status",
+  .function = vl_api_status_command,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+vl_api_message_table_command (vlib_main_t * vm,
+			      unformat_input_t * input,
+			      vlib_cli_command_t * cli_cmd)
+{
+  api_main_t *am = &api_main;
+  int i;
+  int verbose = 0;
+
+  if (unformat (input, "verbose"))
+    verbose = 1;
+
+
+  if (verbose == 0)
+    vlib_cli_output (vm, "%-4s %s", "ID", "Name");
+  else
+    vlib_cli_output (vm, "%-4s %-40s %6s %7s", "ID", "Name", "Bounce",
+		     "MP-safe");
+
+  for (i = 1; i < vec_len (am->msg_names); i++)
+    {
+      if (verbose == 0)
+	{
+	  vlib_cli_output (vm, "%-4d %s", i,
+			   am->msg_names[i] ? am->msg_names[i] :
+			   "  [no handler]");
+	}
+      else
+	{
+	  vlib_cli_output (vm, "%-4d %-40s %6d %7d", i,
+			   am->msg_names[i] ? am->msg_names[i] :
+			   "  [no handler]", am->message_bounce[i],
+			   am->is_mp_safe[i]);
+	}
+    }
+
+  return 0;
+}
+
+/*?
+ * Display the current api message decode tables
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_show_api_message_table_command, static) =
+{
+  .path = "show api message-table",
+  .short_help = "Message Table",
+  .function = vl_api_message_table_command,
+};
+/* *INDENT-ON* */
+
+static int
+range_compare (vl_api_msg_range_t * a0, vl_api_msg_range_t * a1)
+{
+  int len0, len1, clen;
+
+  len0 = vec_len (a0->name);
+  len1 = vec_len (a1->name);
+  clen = len0 < len1 ? len0 : len1;
+  return (strncmp ((char *) a0->name, (char *) a1->name, clen));
+}
+
+static u8 *
+format_api_msg_range (u8 * s, va_list * args)
+{
+  vl_api_msg_range_t *rp = va_arg (*args, vl_api_msg_range_t *);
+
+  if (rp == 0)
+    s = format (s, "%-50s%9s%9s", "Name", "First-ID", "Last-ID");
+  else
+    s = format (s, "%-50s%9d%9d", rp->name, rp->first_msg_id,
+		rp->last_msg_id);
+
+  return s;
+}
+
+static clib_error_t *
+vl_api_show_plugin_command (vlib_main_t * vm,
+			    unformat_input_t * input,
+			    vlib_cli_command_t * cli_cmd)
+{
+  api_main_t *am = &api_main;
+  vl_api_msg_range_t *rp = 0;
+  int i;
+
+  if (vec_len (am->msg_ranges) == 0)
+    {
+      vlib_cli_output (vm, "No plugin API message ranges configured...");
+      return 0;
+    }
+
+  rp = vec_dup (am->msg_ranges);
+
+  vec_sort_with_function (rp, range_compare);
+
+  vlib_cli_output (vm, "Plugin API message ID ranges...\n");
+  vlib_cli_output (vm, "%U", format_api_msg_range, 0 /* header */ );
+
+  for (i = 0; i < vec_len (rp); i++)
+    vlib_cli_output (vm, "%U", format_api_msg_range, rp + i);
+
+  vec_free (rp);
+
+  return 0;
+}
+
+/*?
+ * Display the plugin binary API message range table
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_show_api_plugin_command, static) =
+{
+  .path = "show api plugin",
+  .short_help = "show api plugin",
+  .function = vl_api_show_plugin_command,
+};
+/* *INDENT-ON* */
+
+typedef enum
+{
+  DUMP,
+  CUSTOM_DUMP,
+  REPLAY,
+  INITIALIZERS,
+} vl_api_replay_t;
+
+u8 *
+format_vl_msg_api_trace_status (u8 * s, va_list * args)
+{
+  api_main_t *am = va_arg (*args, api_main_t *);
+  vl_api_trace_which_t which = va_arg (*args, vl_api_trace_which_t);
+  vl_api_trace_t *tp;
+  char *trace_name;
+
+  switch (which)
+    {
+    case VL_API_TRACE_TX:
+      tp = am->tx_trace;
+      trace_name = "TX trace";
+      break;
+
+    case VL_API_TRACE_RX:
+      tp = am->rx_trace;
+      trace_name = "RX trace";
+      break;
+
+    default:
+      abort ();
+    }
+
+  if (tp == 0)
+    {
+      s = format (s, "%s: not yet configured.\n", trace_name);
+      return s;
+    }
+
+  s = format (s, "%s: used %d of %d items, %s enabled, %s wrapped\n",
+	      trace_name, vec_len (tp->traces), tp->nitems,
+	      tp->enabled ? "is" : "is not", tp->wrapped ? "has" : "has not");
+  return s;
+}
+
+void vl_msg_api_custom_dump_configure (api_main_t * am)
+  __attribute__ ((weak));
+void
+vl_msg_api_custom_dump_configure (api_main_t * am)
+{
+}
+
+static void
+vl_msg_api_process_file (vlib_main_t * vm, u8 * filename,
+			 u32 first_index, u32 last_index,
+			 vl_api_replay_t which)
+{
+  vl_api_trace_file_header_t *hp;
+  int i, fd;
+  struct stat statb;
+  size_t file_size;
+  u8 *msg;
+  u8 endian_swap_needed = 0;
+  api_main_t *am = &api_main;
+  u8 *tmpbuf = 0;
+  u32 nitems;
+  void **saved_print_handlers = 0;
+
+  fd = open ((char *) filename, O_RDONLY);
+
+  if (fd < 0)
+    {
+      vlib_cli_output (vm, "Couldn't open %s\n", filename);
+      return;
+    }
+
+  if (fstat (fd, &statb) < 0)
+    {
+      vlib_cli_output (vm, "Couldn't stat %s\n", filename);
+      close (fd);
+      return;
+    }
+
+  if (!(statb.st_mode & S_IFREG) || (statb.st_size < sizeof (*hp)))
+    {
+      vlib_cli_output (vm, "File not plausible: %s\n", filename);
+      close (fd);
+      return;
+    }
+
+  file_size = statb.st_size;
+  file_size = (file_size + 4095) & ~(4096);
+
+  hp = mmap (0, file_size, PROT_READ, MAP_PRIVATE, fd, 0);
+
+  if (hp == (vl_api_trace_file_header_t *) MAP_FAILED)
+    {
+      vlib_cli_output (vm, "mmap failed: %s\n", filename);
+      close (fd);
+      return;
+    }
+  close (fd);
+
+  if ((clib_arch_is_little_endian && hp->endian == VL_API_BIG_ENDIAN)
+      || (clib_arch_is_big_endian && hp->endian == VL_API_LITTLE_ENDIAN))
+    endian_swap_needed = 1;
+
+  if (endian_swap_needed)
+    nitems = ntohl (hp->nitems);
+  else
+    nitems = hp->nitems;
+
+  if (last_index == (u32) ~ 0)
+    {
+      last_index = nitems - 1;
+    }
+
+  if (first_index >= nitems || last_index >= nitems)
+    {
+      vlib_cli_output (vm, "Range (%d, %d) outside file range (0, %d)\n",
+		       first_index, last_index, nitems - 1);
+      munmap (hp, file_size);
+      return;
+    }
+  if (hp->wrapped)
+    vlib_cli_output (vm,
+		     "Note: wrapped/incomplete trace, results may vary\n");
+
+  if (which == CUSTOM_DUMP)
+    {
+      saved_print_handlers = (void **) vec_dup (am->msg_print_handlers);
+      vl_msg_api_custom_dump_configure (am);
+    }
+
+
+  msg = (u8 *) (hp + 1);
+
+  for (i = 0; i < first_index; i++)
+    {
+      trace_cfg_t *cfgp;
+      int size;
+      u16 msg_id;
+
+      size = clib_host_to_net_u32 (*(u32 *) msg);
+      msg += sizeof (u32);
+
+      if (clib_arch_is_little_endian)
+	msg_id = ntohs (*((u16 *) msg));
+      else
+	msg_id = *((u16 *) msg);
+
+      cfgp = am->api_trace_cfg + msg_id;
+      if (!cfgp)
+	{
+	  vlib_cli_output (vm, "Ugh: msg id %d no trace config\n", msg_id);
+	  munmap (hp, file_size);
+	  return;
+	}
+      msg += size;
+    }
+
+  if (which == REPLAY)
+    am->replay_in_progress = 1;
+
+  for (; i <= last_index; i++)
+    {
+      trace_cfg_t *cfgp;
+      u16 *msg_idp;
+      u16 msg_id;
+      int size;
+
+      if (which == DUMP)
+	vlib_cli_output (vm, "---------- trace %d -----------\n", i);
+
+      size = clib_host_to_net_u32 (*(u32 *) msg);
+      msg += sizeof (u32);
+
+      if (clib_arch_is_little_endian)
+	msg_id = ntohs (*((u16 *) msg));
+      else
+	msg_id = *((u16 *) msg);
+
+      cfgp = am->api_trace_cfg + msg_id;
+      if (!cfgp)
+	{
+	  vlib_cli_output (vm, "Ugh: msg id %d no trace config\n", msg_id);
+	  munmap (hp, file_size);
+	  vec_free (tmpbuf);
+	  am->replay_in_progress = 0;
+	  return;
+	}
+
+      /* Copy the buffer (from the read-only mmap'ed file) */
+      vec_validate (tmpbuf, size - 1 + sizeof (uword));
+      clib_memcpy (tmpbuf + sizeof (uword), msg, size);
+      memset (tmpbuf, 0xf, sizeof (uword));
+
+      /*
+       * Endian swap if needed. All msg data is supposed to be
+       * in network byte order. All msg handlers are supposed to
+       * know that. The generic message dumpers don't know that.
+       * One could fix apigen, I suppose.
+       */
+      if ((which == DUMP && clib_arch_is_little_endian) || endian_swap_needed)
+	{
+	  void (*endian_fp) (void *);
+	  if (msg_id >= vec_len (am->msg_endian_handlers)
+	      || (am->msg_endian_handlers[msg_id] == 0))
+	    {
+	      vlib_cli_output (vm, "Ugh: msg id %d no endian swap\n", msg_id);
+	      munmap (hp, file_size);
+	      vec_free (tmpbuf);
+	      am->replay_in_progress = 0;
+	      return;
+	    }
+	  endian_fp = am->msg_endian_handlers[msg_id];
+	  (*endian_fp) (tmpbuf + sizeof (uword));
+	}
+
+      /* msg_id always in network byte order */
+      if (clib_arch_is_little_endian)
+	{
+	  msg_idp = (u16 *) (tmpbuf + sizeof (uword));
+	  *msg_idp = msg_id;
+	}
+
+      switch (which)
+	{
+	case CUSTOM_DUMP:
+	case DUMP:
+	  if (msg_id < vec_len (am->msg_print_handlers) &&
+	      am->msg_print_handlers[msg_id])
+	    {
+	      u8 *(*print_fp) (void *, void *);
+
+	      print_fp = (void *) am->msg_print_handlers[msg_id];
+	      (*print_fp) (tmpbuf + sizeof (uword), vm);
+	    }
+	  else
+	    {
+	      vlib_cli_output (vm, "Skipping msg id %d: no print fcn\n",
+			       msg_id);
+	      break;
+	    }
+	  break;
+
+	case INITIALIZERS:
+	  if (msg_id < vec_len (am->msg_print_handlers) &&
+	      am->msg_print_handlers[msg_id])
+	    {
+	      u8 *s;
+	      int j;
+	      u8 *(*print_fp) (void *, void *);
+
+	      print_fp = (void *) am->msg_print_handlers[msg_id];
+
+	      vlib_cli_output (vm, "/*");
+
+	      (*print_fp) (tmpbuf + sizeof (uword), vm);
+	      vlib_cli_output (vm, "*/\n");
+
+	      s = format (0, "static u8 * vl_api_%s_%d[%d] = {",
+			  am->msg_names[msg_id], i,
+			  am->api_trace_cfg[msg_id].size);
+
+	      for (j = 0; j < am->api_trace_cfg[msg_id].size; j++)
+		{
+		  if ((j & 7) == 0)
+		    s = format (s, "\n    ");
+		  s = format (s, "0x%02x,", tmpbuf[sizeof (uword) + j]);
+		}
+	      s = format (s, "\n};\n%c", 0);
+	      vlib_cli_output (vm, (char *) s);
+	      vec_free (s);
+	    }
+	  break;
+
+	case REPLAY:
+	  if (msg_id < vec_len (am->msg_print_handlers) &&
+	      am->msg_print_handlers[msg_id] && cfgp->replay_enable)
+	    {
+	      void (*handler) (void *);
+
+	      handler = (void *) am->msg_handlers[msg_id];
+
+	      if (!am->is_mp_safe[msg_id])
+		vl_msg_api_barrier_sync ();
+	      (*handler) (tmpbuf + sizeof (uword));
+	      if (!am->is_mp_safe[msg_id])
+		vl_msg_api_barrier_release ();
+	    }
+	  else
+	    {
+	      if (cfgp->replay_enable)
+		vlib_cli_output (vm, "Skipping msg id %d: no handler\n",
+				 msg_id);
+	      break;
+	    }
+	  break;
+	}
+
+      _vec_len (tmpbuf) = 0;
+      msg += size;
+    }
+
+  if (saved_print_handlers)
+    {
+      clib_memcpy (am->msg_print_handlers, saved_print_handlers,
+		   vec_len (am->msg_print_handlers) * sizeof (void *));
+      vec_free (saved_print_handlers);
+    }
+
+  munmap (hp, file_size);
+  vec_free (tmpbuf);
+  am->replay_in_progress = 0;
+}
+
+static clib_error_t *
+api_trace_command_fn (vlib_main_t * vm,
+		      unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+  u32 nitems = 256 << 10;
+  api_main_t *am = &api_main;
+  vl_api_trace_which_t which = VL_API_TRACE_RX;
+  u8 *filename;
+  u32 first = 0;
+  u32 last = (u32) ~ 0;
+  FILE *fp;
+  int rv;
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "on") || unformat (input, "enable"))
+	{
+	  if (unformat (input, "nitems %d", &nitems))
+	    ;
+	  vl_msg_api_trace_configure (am, which, nitems);
+	  vl_msg_api_trace_onoff (am, which, 1 /* on */ );
+	}
+      else if (unformat (input, "off"))
+	{
+	  vl_msg_api_trace_onoff (am, which, 0);
+	}
+      else if (unformat (input, "save %s", &filename))
+	{
+	  u8 *chroot_filename;
+	  if (strstr ((char *) filename, "..")
+	      || index ((char *) filename, '/'))
+	    {
+	      vlib_cli_output (vm, "illegal characters in filename '%s'",
+			       filename);
+	      return 0;
+	    }
+
+	  chroot_filename = format (0, "/tmp/%s%c", filename, 0);
+
+	  vec_free (filename);
+
+	  fp = fopen ((char *) chroot_filename, "w");
+	  if (fp == NULL)
+	    {
+	      vlib_cli_output (vm, "Couldn't create %s\n", chroot_filename);
+	      return 0;
+	    }
+	  rv = vl_msg_api_trace_save (am, which, fp);
+	  fclose (fp);
+	  if (rv == -1)
+	    vlib_cli_output (vm, "API Trace data not present\n");
+	  else if (rv == -2)
+	    vlib_cli_output (vm, "File for writing is closed\n");
+	  else if (rv == -10)
+	    vlib_cli_output (vm, "Error while writing header to file\n");
+	  else if (rv == -11)
+	    vlib_cli_output (vm, "Error while writing trace to file\n");
+	  else if (rv == -12)
+	    vlib_cli_output (vm,
+			     "Error while writing end of buffer trace to file\n");
+	  else if (rv == -13)
+	    vlib_cli_output (vm,
+			     "Error while writing start of buffer trace to file\n");
+	  else if (rv < 0)
+	    vlib_cli_output (vm, "Unkown error while saving: %d", rv);
+	  else
+	    vlib_cli_output (vm, "API trace saved to %s\n", chroot_filename);
+	  vec_free (chroot_filename);
+	}
+      else if (unformat (input, "dump %s", &filename))
+	{
+	  vl_msg_api_process_file (vm, filename, first, last, DUMP);
+	}
+      else if (unformat (input, "custom-dump %s", &filename))
+	{
+	  vl_msg_api_process_file (vm, filename, first, last, CUSTOM_DUMP);
+	}
+      else if (unformat (input, "replay %s", &filename))
+	{
+	  vl_msg_api_process_file (vm, filename, first, last, REPLAY);
+	}
+      else if (unformat (input, "initializers %s", &filename))
+	{
+	  vl_msg_api_process_file (vm, filename, first, last, INITIALIZERS);
+	}
+      else if (unformat (input, "tx"))
+	{
+	  which = VL_API_TRACE_TX;
+	}
+      else if (unformat (input, "first %d", &first))
+	{
+	  ;
+	}
+      else if (unformat (input, "last %d", &last))
+	{
+	  ;
+	}
+      else if (unformat (input, "status"))
+	{
+	  vlib_cli_output (vm, "%U", format_vl_msg_api_trace_status,
+			   am, which);
+	}
+      else if (unformat (input, "free"))
+	{
+	  vl_msg_api_trace_onoff (am, which, 0);
+	  vl_msg_api_trace_free (am, which);
+	}
+      else if (unformat (input, "post-mortem-on"))
+	vl_msg_api_post_mortem_dump_enable_disable (1 /* enable */ );
+      else if (unformat (input, "post-mortem-off"))
+	vl_msg_api_post_mortem_dump_enable_disable (0 /* enable */ );
+      else
+	return clib_error_return (0, "unknown input `%U'",
+				  format_unformat_error, input);
+    }
+  return 0;
+}
+
+/*?
+ * Display, replay, or save a binary API trace
+?*/
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (api_trace_command, static) =
+{
+  .path = "api trace",
+  .short_help = "api trace [on|off][first <n>][last <n>][status][free]"
+      "[post-mortem-on][dump|custom-dump|save|replay <file>]",
+  .function = api_trace_command_fn,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+vl_api_trace_command (vlib_main_t * vm,
+		      unformat_input_t * input, vlib_cli_command_t * cli_cmd)
+{
+  u32 nitems = 1024;
+  vl_api_trace_which_t which = VL_API_TRACE_RX;
+  api_main_t *am = &api_main;
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "rx nitems %u", &nitems) || unformat (input, "rx"))
+	goto configure;
+      else if (unformat (input, "tx nitems %u", &nitems)
+	       || unformat (input, "tx"))
+	{
+	  which = VL_API_TRACE_RX;
+	  goto configure;
+	}
+      else if (unformat (input, "on rx"))
+	{
+	  vl_msg_api_trace_onoff (am, VL_API_TRACE_RX, 1);
+	}
+      else if (unformat (input, "on tx"))
+	{
+	  vl_msg_api_trace_onoff (am, VL_API_TRACE_TX, 1);
+	}
+      else if (unformat (input, "on"))
+	{
+	  vl_msg_api_trace_onoff (am, VL_API_TRACE_RX, 1);
+	}
+      else if (unformat (input, "off"))
+	{
+	  vl_msg_api_trace_onoff (am, VL_API_TRACE_RX, 0);
+	  vl_msg_api_trace_onoff (am, VL_API_TRACE_TX, 0);
+	}
+      else if (unformat (input, "free"))
+	{
+	  vl_msg_api_trace_onoff (am, VL_API_TRACE_RX, 0);
+	  vl_msg_api_trace_onoff (am, VL_API_TRACE_TX, 0);
+	  vl_msg_api_trace_free (am, VL_API_TRACE_RX);
+	  vl_msg_api_trace_free (am, VL_API_TRACE_TX);
+	}
+      else if (unformat (input, "debug on"))
+	{
+	  am->msg_print_flag = 1;
+	}
+      else if (unformat (input, "debug off"))
+	{
+	  am->msg_print_flag = 0;
+	}
+      else
+	return clib_error_return (0, "unknown input `%U'",
+				  format_unformat_error, input);
+    }
+  return 0;
+
+configure:
+  if (vl_msg_api_trace_configure (am, which, nitems))
+    {
+      vlib_cli_output (vm, "warning: trace configure error (%d, %d)",
+		       which, nitems);
+    }
+
+  return 0;
+}
+
+/*?
+ * Control the binary API trace mechanism
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (trace, static) =
+{
+  .path = "set api-trace [on][on tx][on rx][off][free][debug on][debug off]",
+  .short_help = "API trace",
+  .function = vl_api_trace_command,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+api_trace_config_fn (vlib_main_t * vm, unformat_input_t * input)
+{
+  u32 nitems = 256 << 10;
+  vl_api_trace_which_t which = VL_API_TRACE_RX;
+  api_main_t *am = &api_main;
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "on") || unformat (input, "enable"))
+	{
+	  if (unformat (input, "nitems %d", &nitems))
+	    ;
+	  vl_msg_api_trace_configure (am, which, nitems);
+	  vl_msg_api_trace_onoff (am, which, 1 /* on */ );
+	  vl_msg_api_post_mortem_dump_enable_disable (1 /* enable */ );
+	}
+      else if (unformat (input, "save-api-table %s",
+			 &am->save_msg_table_filename))
+	;
+      else
+	return clib_error_return (0, "unknown input `%U'",
+				  format_unformat_error, input);
+    }
+  return 0;
+}
+
+/*?
+ * This module has three configuration parameters:
+ * "on" or "enable" - enables binary api tracing
+ * "nitems <nnn>" - sets the size of the circular buffer to <nnn>
+ * "save-api-table <filename>" - dumps the API message table to /tmp/<filename>
+?*/
+VLIB_CONFIG_FUNCTION (api_trace_config_fn, "api-trace");
+
+static clib_error_t *
+api_queue_config_fn (vlib_main_t * vm, unformat_input_t * input)
+{
+  api_main_t *am = &api_main;
+  u32 nitems;
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "length %d", &nitems) ||
+	  (unformat (input, "len %d", &nitems)))
+	{
+	  if (nitems >= 1024)
+	    am->vlib_input_queue_length = nitems;
+	  else
+	    clib_warning ("vlib input queue length %d too small, ignored",
+			  nitems);
+	}
+      else
+	return clib_error_return (0, "unknown input `%U'",
+				  format_unformat_error, input);
+    }
+  return 0;
+}
+
+VLIB_CONFIG_FUNCTION (api_queue_config_fn, "api-queue");
+
+static u8 *
+extract_name (u8 * s)
+{
+  u8 *rv;
+
+  rv = vec_dup (s);
+
+  while (vec_len (rv) && rv[vec_len (rv)] != '_')
+    _vec_len (rv)--;
+
+  rv[vec_len (rv)] = 0;
+
+  return rv;
+}
+
+static u8 *
+extract_crc (u8 * s)
+{
+  int i;
+  u8 *rv;
+
+  rv = vec_dup (s);
+
+  for (i = vec_len (rv) - 1; i >= 0; i--)
+    {
+      if (rv[i] == '_')
+	{
+	  vec_delete (rv, i + 1, 0);
+	  break;
+	}
+    }
+  return rv;
+}
+
+typedef struct
+{
+  u8 *name_and_crc;
+  u8 *name;
+  u8 *crc;
+  u32 msg_index;
+  int which;
+} msg_table_unserialize_t;
+
+static int
+table_id_cmp (void *a1, void *a2)
+{
+  msg_table_unserialize_t *n1 = a1;
+  msg_table_unserialize_t *n2 = a2;
+
+  return (n1->msg_index - n2->msg_index);
+}
+
+static int
+table_name_and_crc_cmp (void *a1, void *a2)
+{
+  msg_table_unserialize_t *n1 = a1;
+  msg_table_unserialize_t *n2 = a2;
+
+  return strcmp ((char *) n1->name_and_crc, (char *) n2->name_and_crc);
+}
+
+static clib_error_t *
+dump_api_table_file_command_fn (vlib_main_t * vm,
+				unformat_input_t * input,
+				vlib_cli_command_t * cmd)
+{
+  u8 *filename = 0;
+  api_main_t *am = &api_main;
+  serialize_main_t _sm, *sm = &_sm;
+  clib_error_t *error;
+  u32 nmsgs;
+  u32 msg_index;
+  u8 *name_and_crc;
+  int compare_current = 0;
+  int numeric_sort = 0;
+  msg_table_unserialize_t *table = 0, *item;
+  u32 i;
+  u32 ndifferences = 0;
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "file %s", &filename))
+	;
+      else if (unformat (input, "compare-current")
+	       || unformat (input, "compare"))
+	compare_current = 1;
+      else if (unformat (input, "numeric"))
+	numeric_sort = 1;
+      else
+	return clib_error_return (0, "unknown input `%U'",
+				  format_unformat_error, input);
+    }
+
+  if (numeric_sort && compare_current)
+    return clib_error_return
+      (0, "Comparison and numeric sorting are incompatible");
+
+  if (filename == 0)
+    return clib_error_return (0, "File not specified");
+
+  /* Load the serialized message table from the table dump */
+
+  error = unserialize_open_clib_file (sm, (char *) filename);
+
+  if (error)
+    return error;
+
+  unserialize_integer (sm, &nmsgs, sizeof (u32));
+
+  for (i = 0; i < nmsgs; i++)
+    {
+      msg_index = unserialize_likely_small_unsigned_integer (sm);
+      unserialize_cstring (sm, (char **) &name_and_crc);
+      vec_add2 (table, item, 1);
+      item->msg_index = msg_index;
+      item->name_and_crc = name_and_crc;
+      item->name = extract_name (name_and_crc);
+      item->crc = extract_crc (name_and_crc);
+      item->which = 0;		/* file */
+    }
+  serialize_close (sm);
+
+  /* Compare with the current image? */
+  if (compare_current)
+    {
+      /* Append the current message table */
+      u8 *tblv = vl_api_serialize_message_table (am, 0);
+
+      serialize_open_vector (sm, tblv);
+      unserialize_integer (sm, &nmsgs, sizeof (u32));
+
+      for (i = 0; i < nmsgs; i++)
+	{
+	  msg_index = unserialize_likely_small_unsigned_integer (sm);
+	  unserialize_cstring (sm, (char **) &name_and_crc);
+
+	  vec_add2 (table, item, 1);
+	  item->msg_index = msg_index;
+	  item->name_and_crc = name_and_crc;
+	  item->name = extract_name (name_and_crc);
+	  item->crc = extract_crc (name_and_crc);
+	  item->which = 1;	/* current_image */
+	}
+      vec_free (tblv);
+    }
+
+  /* Sort the table. */
+  if (numeric_sort)
+    vec_sort_with_function (table, table_id_cmp);
+  else
+    vec_sort_with_function (table, table_name_and_crc_cmp);
+
+  if (compare_current)
+    {
+      ndifferences = 0;
+
+      /*
+       * In this case, the recovered table will have two entries per
+       * API message. So, if entries i and i+1 match, the message definitions
+       * are identical. Otherwise, the crc is different, or a message is
+       * present in only one of the tables.
+       */
+      vlib_cli_output (vm, "%=60s %s", "Message Name", "Result");
+
+      for (i = 0; i < vec_len (table);)
+	{
+	  /* Last message lonely? */
+	  if (i == vec_len (table) - 1)
+	    {
+	      ndifferences++;
+	      goto last_unique;
+	    }
+
+	  /* Identical pair? */
+	  if (!strncmp
+	      ((char *) table[i].name_and_crc,
+	       (char *) table[i + 1].name_and_crc,
+	       vec_len (table[i].name_and_crc)))
+	    {
+	      i += 2;
+	      continue;
+	    }
+
+	  ndifferences++;
+
+	  /* Only in one of two tables? */
+	  if (strncmp ((char *) table[i].name, (char *) table[i + 1].name,
+		       vec_len (table[i].name)))
+	    {
+	    last_unique:
+	      vlib_cli_output (vm, "%-60s only in %s",
+			       table[i].name, table[i].which ?
+			       "image" : "file");
+	      i++;
+	      continue;
+	    }
+	  /* In both tables, but with different signatures */
+	  vlib_cli_output (vm, "%-60s definition changed", table[i].name);
+	  i += 2;
+	}
+      if (ndifferences == 0)
+	vlib_cli_output (vm, "No api message signature differences found.");
+      else
+	vlib_cli_output (vm, "Found %u api message signature differences",
+			 ndifferences);
+      goto cleanup;
+    }
+
+  /* Dump the table, sorted as shown above */
+  vlib_cli_output (vm, "%=60s %=8s %=10s", "Message name", "MsgID", "CRC");
+
+  for (i = 0; i < vec_len (table); i++)
+    {
+      item = table + i;
+      vlib_cli_output (vm, "%-60s %8u %10s", item->name,
+		       item->msg_index, item->crc);
+    }
+
+cleanup:
+  for (i = 0; i < vec_len (table); i++)
+    {
+      vec_free (table[i].name_and_crc);
+      vec_free (table[i].name);
+      vec_free (table[i].crc);
+    }
+
+  vec_free (table);
+
+  return 0;
+}
+
+/*?
+ * Displays a serialized API message decode table, sorted by message name
+ *
+ * @cliexpar
+ * @cliexstart{show api dump file <filename>}
+ *                                                Message name    MsgID        CRC
+ * accept_session                                                    407   8e2a127e
+ * accept_session_reply                                              408   67d8c22a
+ * add_node_next                                                     549   e4202993
+ * add_node_next_reply                                               550   e89d6eed
+ * etc.
+ * @cliexend
+?*/
+
+/*?
+ * Compares a serialized API message decode table with the current image
+ *
+ * @cliexpar
+ * @cliexstart{show api dump file <filename> compare}
+ * ip_add_del_route                                             definition changed
+ * ip_table_add_del                                             definition changed
+ * l2_macs_event                                                only in image
+ * vnet_ip4_fib_counters                                        only in file
+ * vnet_ip4_nbr_counters                                        only in file
+ * @cliexend
+?*/
+
+/*?
+ * Display a serialized API message decode table, compare a saved
+ * decode table with the current image, to establish API differences.
+ *
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (dump_api_table_file, static) =
+{
+  .path = "show api dump",
+  .short_help = "show api dump file <filename> [numeric | compare-current]",
+  .function = dump_api_table_file_command_fn,
+};
+
+/* *INDENT-ON* */
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */