text: /*
   * builtin_client.c - vpp built-in tcp client/connect code
   *
   * Copyright (c) 2017 by 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 <vnet/vnet.h>
  #include <vnet/plugin/plugin.h>
  #include <vnet/tcp/builtin_client.h>
  
  #include <vlibapi/api.h>
  #include <vlibmemory/api.h>
  #include <vlibsocket/api.h>
  #include <vpp/app/version.h>
  
  #define TCP_BUILTIN_CLIENT_DBG (0)
  
  static void
  signal_evt_to_cli_i (int *code)
  {
    tclient_main_t *tm = &tclient_main;
    ASSERT (vlib_get_thread_index () == 0);
    vlib_process_signal_event (tm->vlib_main, tm->cli_node_index, *code, 0);
  }
  
  static void
  signal_evt_to_cli (int code)
  {
    if (vlib_get_thread_index () != 0)
      vl_api_rpc_call_main_thread (signal_evt_to_cli_i, (u8 *) & code,
  				 sizeof (code));
    else
      signal_evt_to_cli_i (&code);
  }
  
  static void
  send_test_chunk (tclient_main_t * tm, session_t * s)
  {
    u8 *test_data = tm->connect_test_data;
    int test_buf_offset;
    u32 bytes_this_chunk;
    session_fifo_event_t evt;
    static int serial_number = 0;
    svm_fifo_t *txf;
    int rv;
  
    ASSERT (vec_len (test_data) > 0);
  
    test_buf_offset = s->bytes_sent % vec_len (test_data);
    bytes_this_chunk = vec_len (test_data) - test_buf_offset;
  
    bytes_this_chunk = bytes_this_chunk < s->bytes_to_send
      ? bytes_this_chunk : s->bytes_to_send;
  
    txf = s->server_tx_fifo;
    rv = svm_fifo_enqueue_nowait (txf, bytes_this_chunk,
  				test_data + test_buf_offset);
  
    /* If we managed to enqueue data... */
    if (rv > 0)
      {
        /* Account for it... */
        s->bytes_to_send -= rv;
        s->bytes_sent += rv;
  
        if (TCP_BUILTIN_CLIENT_DBG)
  	{
            /* *INDENT-OFF* */
            ELOG_TYPE_DECLARE (e) =
              {
                .format = "tx-enq: xfer %d bytes, sent %u remain %u",
                .format_args = "i4i4i4",
              };
            /* *INDENT-ON* */
  	  struct
  	  {
  	    u32 data[3];
  	  } *ed;
  	  ed = ELOG_DATA (&vlib_global_main.elog_main, e);
  	  ed->data[0] = rv;
  	  ed->data[1] = s->bytes_sent;
  	  ed->data[2] = s->bytes_to_send;
  	}
  
        /* Poke the session layer */
        if (svm_fifo_set_event (txf))
  	{
  	  /* Fabricate TX event, send to vpp */
  	  evt.fifo = txf;
  	  evt.event_type = FIFO_EVENT_APP_TX;
  	  evt.event_id = serial_number++;
  
  	  if (unix_shared_memory_queue_add
  	      (tm->vpp_event_queue[txf->master_thread_index], (u8 *) & evt,
  	       0 /* do wait for mutex */ ))
  	    clib_warning ("could not enqueue event");
  	}
      }
  }
  
  static void
  receive_test_chunk (tclient_main_t * tm, session_t * s)
  {
    svm_fifo_t *rx_fifo = s->server_rx_fifo;
    int n_read, test_bytes = 0;
    u32 my_thread_index = vlib_get_thread_index ();
  
    /* Allow enqueuing of new event */
    // svm_fifo_unset_event (rx_fifo);
  
    if (test_bytes)
      {
        n_read = svm_fifo_dequeue_nowait (rx_fifo,
  					vec_len (tm->rx_buf[my_thread_index]),
  					tm->rx_buf[my_thread_index]);
      }
    else
      {
        n_read = svm_fifo_max_dequeue (rx_fifo);
        svm_fifo_dequeue_drop (rx_fifo, n_read);
      }
  
    if (n_read > 0)
      {
        if (TCP_BUILTIN_CLIENT_DBG)
  	{
            /* *INDENT-OFF* */
            ELOG_TYPE_DECLARE (e) =
              {
                .format = "rx-deq: %d bytes",
                .format_args = "i4",
              };
            /* *INDENT-ON* */
  	  struct
  	  {
  	    u32 data[1];
  	  } *ed;
  	  ed = ELOG_DATA (&vlib_global_main.elog_main, e);
  	  ed->data[0] = n_read;
  	}
  
        if (test_bytes)
  	{
  	  int i;
  	  for (i = 0; i < n_read; i++)
  	    {
  	      if (tm->rx_buf[my_thread_index][i]
  		  != ((s->bytes_received + i) & 0xff))
  		{
  		  clib_warning ("read %d error at byte %lld, 0x%x not 0x%x",
  				n_read, s->bytes_received + i,
  				tm->rx_buf[my_thread_index][i],
  				((s->bytes_received + i) & 0xff));
  		}
  	    }
  	}
        s->bytes_to_receive -= n_read;
        s->bytes_received += n_read;
      }
  }
  
  static uword
  builtin_client_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
  			vlib_frame_t * frame)
  {
    tclient_main_t *tm = &tclient_main;
    int my_thread_index = vlib_get_thread_index ();
    session_t *sp;
    int i;
    int delete_session;
    u32 *connection_indices;
    u32 *connections_this_batch;
    u32 nconnections_this_batch;
  
    connection_indices = tm->connection_index_by_thread[my_thread_index];
    connections_this_batch =
      tm->connections_this_batch_by_thread[my_thread_index];
  
    if ((tm->run_test == 0) ||
        ((vec_len (connection_indices) == 0)
         && vec_len (connections_this_batch) == 0))
      return 0;
  
    /* Grab another pile of connections */
    if (PREDICT_FALSE (vec_len (connections_this_batch) == 0))
      {
        nconnections_this_batch =
  	clib_min (tm->connections_per_batch, vec_len (connection_indices));
  
        ASSERT (nconnections_this_batch > 0);
        vec_validate (connections_this_batch, nconnections_this_batch - 1);
        clib_memcpy (connections_this_batch,
  		   connection_indices + vec_len (connection_indices)
  		   - nconnections_this_batch,
  		   nconnections_this_batch * sizeof (u32));
        _vec_len (connection_indices) -= nconnections_this_batch;
      }
  
    if (PREDICT_FALSE (tm->prev_conns != tm->connections_per_batch
  		     && tm->prev_conns == vec_len (connections_this_batch)))
      {
        tm->repeats++;
        tm->prev_conns = vec_len (connections_this_batch);
        if (tm->repeats == 500000)
  	{
  	  clib_warning ("stuck clients");
  	}
      }
    else
      {
        tm->prev_conns = vec_len (connections_this_batch);
        tm->repeats = 0;
      }
  
    for (i = 0; i < vec_len (connections_this_batch); i++)
      {
        delete_session = 1;
  
        sp = pool_elt_at_index (tm->sessions, connections_this_batch[i]);
  
        if (sp->bytes_to_send > 0)
  	{
  	  send_test_chunk (tm, sp);
  	  delete_session = 0;
  	}
        if (sp->bytes_to_receive > 0)
  	{
  	  receive_test_chunk (tm, sp);
  	  delete_session = 0;
  	}
        if (PREDICT_FALSE (delete_session == 1))
  	{
  	  u32 index, thread_index;
  	  stream_session_t *s;
  
  	  __sync_fetch_and_add (&tm->tx_total, sp->bytes_sent);
  	  __sync_fetch_and_add (&tm->rx_total, sp->bytes_received);
  
  	  stream_session_parse_handle (sp->vpp_session_handle,
  				       &index, &thread_index);
  	  s = stream_session_get_if_valid (index, thread_index);
  
  	  if (s)
  	    {
  	      vnet_disconnect_args_t _a, *a = &_a;
  	      a->handle = stream_session_handle (s);
  	      a->app_index = tm->app_index;
  	      vnet_disconnect_session (a);
  
  	      vec_delete (connections_this_batch, 1, i);
  	      i--;
  	      __sync_fetch_and_add (&tm->ready_connections, -1);
  	    }
  	  else
  	    clib_warning ("session AWOL?");
  
  	  /* Kick the debug CLI process */
  	  if (tm->ready_connections == 0)
  	    {
  	      signal_evt_to_cli (2);
  	    }
  	}
      }
  
    tm->connection_index_by_thread[my_thread_index] = connection_indices;
    tm->connections_this_batch_by_thread[my_thread_index] =
      connections_this_batch;
    return 0;
  }
  
  /* *INDENT-OFF* */
  VLIB_REGISTER_NODE (builtin_client_node) =
  {
    .function = builtin_client_node_fn,
    .name = "builtin-tcp-client",
    .type = VLIB_NODE_TYPE_INPUT,
    .state = VLIB_NODE_STATE_DISABLED,
  };
  /* *INDENT-ON* */
  
  static int
  create_api_loopback (tclient_main_t * tm)
  {
    api_main_t *am = &api_main;
    vl_shmem_hdr_t *shmem_hdr;
  
    shmem_hdr = am->shmem_hdr;
    tm->vl_input_queue = shmem_hdr->vl_input_queue;
    tm->my_client_index =
      vl_api_memclnt_create_internal ("tcp_test_client", tm->vl_input_queue);
    return 0;
  }
  
  static int
  tcp_test_clients_init (vlib_main_t * vm)
  {
    tclient_main_t *tm = &tclient_main;
    vlib_thread_main_t *vtm = vlib_get_thread_main ();
    u32 num_threads;
    int i;
  
    if (create_api_loopback (tm))
      return -1;
  
    num_threads = 1 /* main thread */  + vtm->n_threads;
  
    /* Init test data. Big buffer */
    vec_validate (tm->connect_test_data, 1024 * 1024 - 1);
    for (i = 0; i < vec_len (tm->connect_test_data); i++)
      tm->connect_test_data[i] = i & 0xff;
  
    vec_validate (tm->rx_buf, num_threads - 1);
    for (i = 0; i < num_threads; i++)
      vec_validate (tm->rx_buf[i], vec_len (tm->connect_test_data) - 1);
  
    tm->is_init = 1;
  
    vec_validate (tm->connection_index_by_thread, vtm->n_vlib_mains);
    vec_validate (tm->connections_this_batch_by_thread, vtm->n_vlib_mains);
    vec_validate (tm->vpp_event_queue, vtm->n_vlib_mains);
  
    return 0;
  }
  
  static int
  builtin_session_connected_callback (u32 app_index, u32 api_context,
  				    stream_session_t * s, u8 is_fail)
  {
    tclient_main_t *tm = &tclient_main;
    session_t *session;
    u32 session_index;
    u8 thread_index = vlib_get_thread_index ();
  
    if (is_fail)
      {
        clib_warning ("connection %d failed!", api_context);
        signal_evt_to_cli (-1);
        return 0;
      }
  
    ASSERT (s->thread_index == thread_index);
  
    if (!tm->vpp_event_queue[thread_index])
      tm->vpp_event_queue[thread_index] =
        session_manager_get_vpp_event_queue (thread_index);
  
    /*
     * Setup session
     */
    clib_spinlock_lock_if_init (&tm->sessions_lock);
    pool_get (tm->sessions, session);
    clib_spinlock_unlock_if_init (&tm->sessions_lock);
  
    memset (session, 0, sizeof (*session));
    session_index = session - tm->sessions;
    session->bytes_to_send = tm->bytes_to_send;
    session->bytes_to_receive = tm->no_return ? 0ULL : tm->bytes_to_send;
    session->server_rx_fifo = s->server_rx_fifo;
    session->server_rx_fifo->client_session_index = session_index;
    session->server_tx_fifo = s->server_tx_fifo;
    session->server_tx_fifo->client_session_index = session_index;
    session->vpp_session_handle = stream_session_handle (s);
  
    vec_add1 (tm->connection_index_by_thread[thread_index], session_index);
    __sync_fetch_and_add (&tm->ready_connections, 1);
    if (tm->ready_connections == tm->expected_connections)
      {
        tm->run_test = 1;
        /* Signal the CLI process that the action is starting... */
        signal_evt_to_cli (1);
      }
  
    return 0;
  }
  
  static void
  builtin_session_reset_callback (stream_session_t * s)
  {
    if (s->session_state == SESSION_STATE_READY)
      clib_warning ("Reset active connection %U", format_stream_session, s, 2);
    stream_session_cleanup (s);
    return;
  }
  
  static int
  builtin_session_create_callback (stream_session_t * s)
  {
    return 0;
  }
  
  static void
  builtin_session_disconnect_callback (stream_session_t * s)
  {
    tclient_main_t *tm = &tclient_main;
    vnet_disconnect_args_t _a, *a = &_a;
    a->handle = stream_session_handle (s);
    a->app_index = tm->app_index;
    vnet_disconnect_session (a);
    return;
  }
  
  static int
  builtin_server_rx_callback (stream_session_t * s)
  {
    return 0;
  }
  
  /* *INDENT-OFF* */
  static session_cb_vft_t builtin_clients = {
    .session_reset_callback = builtin_session_reset_callback,
    .session_connected_callback = builtin_session_connected_callback,
    .session_accept_callback = builtin_session_create_callback,
    .session_disconnect_callback = builtin_session_disconnect_callback,
    .builtin_server_rx_callback = builtin_server_rx_callback
  };
  /* *INDENT-ON* */
  
  static int
  attach_builtin_test_clients_app (void)
  {
    tclient_main_t *tm = &tclient_main;
    vnet_app_attach_args_t _a, *a = &_a;
    u8 segment_name[128];
    u32 segment_name_length, prealloc_fifos;
    u64 options[16];
  
    segment_name_length = ARRAY_LEN (segment_name);
  
    memset (a, 0, sizeof (*a));
    memset (options, 0, sizeof (options));
  
    a->api_client_index = tm->my_client_index;
    a->segment_name = segment_name;
    a->segment_name_length = segment_name_length;
    a->session_cb_vft = &builtin_clients;
  
    prealloc_fifos = tm->prealloc_fifos ? tm->expected_connections : 1;
  
    options[SESSION_OPTIONS_ACCEPT_COOKIE] = 0x12345678;
    options[SESSION_OPTIONS_SEGMENT_SIZE] = (2ULL << 32);
    options[SESSION_OPTIONS_RX_FIFO_SIZE] = tm->fifo_size;
    options[SESSION_OPTIONS_TX_FIFO_SIZE] = tm->fifo_size;
    options[APP_OPTIONS_PRIVATE_SEGMENT_COUNT] = tm->private_segment_count;
    options[APP_OPTIONS_PRIVATE_SEGMENT_SIZE] = tm->private_segment_size;
    options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] = prealloc_fifos;
  
    options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_BUILTIN_APP;
  
    a->options = options;
  
    if (vnet_application_attach (a))
      return -1;
  
    tm->app_index = a->app_index;
    return 0;
  }
  
  static void *
  tclient_thread_fn (void *arg)
  {
    return 0;
  }
  
  /** Start a transmit thread */
  int
  start_tx_pthread (tclient_main_t * tm)
  {
    if (tm->client_thread_handle == 0)
      {
        int rv = pthread_create (&tm->client_thread_handle,
  			       NULL /*attr */ ,
  			       tclient_thread_fn, 0);
        if (rv)
  	{
  	  tm->client_thread_handle = 0;
  	  return -1;
  	}
      }
    return 0;
  }
  
  void
  clients_connect (vlib_main_t * vm, u8 * uri, u32 n_clients)
  {
    tclient_main_t *tm = &tclient_main;
    vnet_connect_args_t _a, *a = &_a;
    int i;
    for (i = 0; i < n_clients; i++)
      {
        memset (a, 0, sizeof (*a));
  
        a->uri = (char *) uri;
        a->api_context = i;
        a->app_index = tm->app_index;
        a->mp = 0;
        vnet_connect_uri (a);
  
        /* Crude pacing for call setups  */
        if ((i % 4) == 0)
  	vlib_process_suspend (vm, 10e-6);
      }
  }
  
  static clib_error_t *
  test_tcp_clients_command_fn (vlib_main_t * vm,
  			     unformat_input_t * input,
  			     vlib_cli_command_t * cmd)
  {
    tclient_main_t *tm = &tclient_main;
    vlib_thread_main_t *thread_main = vlib_get_thread_main ();
    uword *event_data = 0, event_type;
    u8 *default_connect_uri = (u8 *) "tcp://6.0.1.1/1234", *uri;
    u64 tmp, total_bytes;
    f64 test_timeout = 20.0, syn_timeout = 20.0, delta;
    f64 time_before_connects;
    u32 n_clients = 1;
    int preallocate_sessions = 0;
    char *transfer_type;
    int i;
  
    tm->bytes_to_send = 8192;
    tm->no_return = 0;
    tm->fifo_size = 64 << 10;
    tm->connections_per_batch = 1000;
    tm->private_segment_count = 0;
    tm->private_segment_size = 0;
    tm->vlib_main = vm;
    if (thread_main->n_vlib_mains > 1)
      clib_spinlock_init (&tm->sessions_lock);
    vec_free (tm->connect_uri);
  
    while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
      {
        if (unformat (input, "nclients %d", &n_clients))
  	;
        else if (unformat (input, "mbytes %lld", &tmp))
  	tm->bytes_to_send = tmp << 20;
        else if (unformat (input, "gbytes %lld", &tmp))
  	tm->bytes_to_send = tmp << 30;
        else if (unformat (input, "bytes %lld", &tm->bytes_to_send))
  	;
        else if (unformat (input, "uri %s", &tm->connect_uri))
  	;
        else if (unformat (input, "test-timeout %f", &test_timeout))
  	;
        else if (unformat (input, "syn-timeout %f", &syn_timeout))
  	;
        else if (unformat (input, "no-return"))
  	tm->no_return = 1;
        else if (unformat (input, "fifo-size %d", &tm->fifo_size))
  	tm->fifo_size <<= 10;
        else if (unformat (input, "private-segment-count %d",
  			 &tm->private_segment_count))
  	;
        else if (unformat (input, "private-segment-size %dm", &tmp))
  	tm->private_segment_size = tmp << 20;
        else if (unformat (input, "private-segment-size %dg", &tmp))
  	tm->private_segment_size = tmp << 30;
        else if (unformat (input, "private-segment-size %d", &tmp))
  	tm->private_segment_size = tmp;
        else if (unformat (input, "preallocate-fifos"))
  	tm->prealloc_fifos = 1;
        else if (unformat (input, "preallocate-sessions"))
  	preallocate_sessions = 1;
        else
  	if (unformat (input, "client-batch %d", &tm->connections_per_batch))
  	;
        else
  	return clib_error_return (0, "unknown input `%U'",
  				  format_unformat_error, input);
      }
  
    /* Store cli process node index for signalling */
    tm->cli_node_index = vlib_get_current_process (vm)->node_runtime.node_index;
  
    if (tm->is_init == 0)
      {
        if (tcp_test_clients_init (vm))
  	return clib_error_return (0, "failed init");
      }
  
  
    tm->ready_connections = 0;
    tm->expected_connections = n_clients;
    tm->rx_total = 0;
    tm->tx_total = 0;
  
    uri = default_connect_uri;
    if (tm->connect_uri)
      uri = tm->connect_uri;
  
  #if TCP_BUILTIN_CLIENT_PTHREAD
    start_tx_pthread ();
  #endif
  
    vlib_worker_thread_barrier_sync (vm);
    vnet_session_enable_disable (vm, 1 /* turn on TCP, etc. */ );
    vlib_worker_thread_barrier_release (vm);
  
    if (tm->test_client_attached == 0)
      {
        if (attach_builtin_test_clients_app ())
  	{
  	  return clib_error_return (0, "app attach failed");
  	}
      }
    tm->test_client_attached = 1;
  
    /* Turn on the builtin client input nodes */
    for (i = 0; i < thread_main->n_vlib_mains; i++)
      vlib_node_set_state (vlib_mains[i], builtin_client_node.index,
  			 VLIB_NODE_STATE_POLLING);
  
    if (preallocate_sessions)
      {
        session_t *sp __attribute__ ((unused));
        for (i = 0; i < n_clients; i++)
  	pool_get (tm->sessions, sp);
        for (i = 0; i < n_clients; i++)
  	pool_put_index (tm->sessions, i);
      }
  
    /* Fire off connect requests */
    time_before_connects = vlib_time_now (vm);
    clients_connect (vm, uri, n_clients);
  
    /* Park until the sessions come up, or ten seconds elapse... */
    vlib_process_wait_for_event_or_clock (vm, syn_timeout);
    event_type = vlib_process_get_events (vm, &event_data);
    switch (event_type)
      {
      case ~0:
        vlib_cli_output (vm, "Timeout with only %d sessions active...",
  		       tm->ready_connections);
        goto cleanup;
  
      case 1:
        delta = vlib_time_now (vm) - time_before_connects;
  
        if (delta != 0.0)
  	{
  	  vlib_cli_output
  	    (vm, "%d three-way handshakes in %.2f seconds, %.2f/sec",
  	     n_clients, delta, ((f64) n_clients) / delta);
  	}
  
        tm->test_start_time = vlib_time_now (tm->vlib_main);
        vlib_cli_output (vm, "Test started at %.6f", tm->test_start_time);
        break;
  
      default:
        vlib_cli_output (vm, "unexpected event(1): %d", event_type);
        goto cleanup;
      }
  
    /* Now wait for the sessions to finish... */
    vlib_process_wait_for_event_or_clock (vm, test_timeout);
    event_type = vlib_process_get_events (vm, &event_data);
    switch (event_type)
      {
      case ~0:
        vlib_cli_output (vm, "Timeout with %d sessions still active...",
  		       tm->ready_connections);
        goto cleanup;
  
      case 2:
        tm->test_end_time = vlib_time_now (vm);
        vlib_cli_output (vm, "Test finished at %.6f", tm->test_end_time);
        break;
  
      default:
        vlib_cli_output (vm, "unexpected event(2): %d", event_type);
        goto cleanup;
      }
  
    delta = tm->test_end_time - tm->test_start_time;
  
    if (delta != 0.0)
      {
        total_bytes = (tm->no_return ? tm->tx_total : tm->rx_total);
        transfer_type = tm->no_return ? "half-duplex" : "full-duplex";
        vlib_cli_output (vm,
  		       "%lld bytes (%lld mbytes, %lld gbytes) in %.2f seconds",
  		       total_bytes, total_bytes / (1ULL << 20),
  		       total_bytes / (1ULL << 30), delta);
        vlib_cli_output (vm, "%.2f bytes/second %s",
  		       ((f64) total_bytes) / (delta), transfer_type);
        vlib_cli_output (vm, "%.4f gbit/second %s",
  		       (((f64) total_bytes * 8.0) / delta / 1e9),
  		       transfer_type);
      }
    else
      vlib_cli_output (vm, "zero delta-t?");
  
  cleanup:
    tm->run_test = 0;
    for (i = 0; i < vec_len (tm->connection_index_by_thread); i++)
      {
        vec_reset_length (tm->connection_index_by_thread[i]);
        vec_reset_length (tm->connections_this_batch_by_thread[i]);
      }
  
    pool_free (tm->sessions);
  
    /* Detach the application, so we can use different fifo sizes next time */
    if (tm->test_client_attached)
      {
        vnet_app_detach_args_t _da, *da = &_da;
        int rv;
  
        da->app_index = tm->app_index;
  
        rv = vnet_application_detach (da);
        if (rv)
  	vlib_cli_output (vm, "WARNING: app detach failed...");
        tm->test_client_attached = 0;
        tm->app_index = ~0;
      }
    return 0;
  }
  
  /* *INDENT-OFF* */
  VLIB_CLI_COMMAND (test_clients_command, static) =
  {
    .path = "test tcp clients",
    .short_help = "test tcp clients [nclients %d] [[m|g]bytes <bytes>] "
        "[test-timeout <time>][syn-timeout <time>][no-return][fifo-size <size>]"
        "[private-segment-count <count>][private-segment-size <bytes>[m|g]]"
        "[preallocate-fifos][preallocate-sessions][client-batch <batch-size>]"
        "[uri <tcp://ip/port>]",
    .function = test_tcp_clients_command_fn,
    .is_mp_safe = 1,
  };
  /* *INDENT-ON* */
  
  clib_error_t *
  tcp_test_clients_main_init (vlib_main_t * vm)
  {
    tclient_main_t *tm = &tclient_main;
    tm->is_init = 0;
    return 0;
  }
  
  VLIB_INIT_FUNCTION (tcp_test_clients_main_init);
  
  /*
   * fd.io coding-style-patch-verification: ON
   *
   * Local Variables:
   * eval: (c-set-style "gnu")
   * End:
   */
  