text: /*
   * Copyright (c) 2017 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 <unistd.h>
  #include <errno.h>
  #include <stdlib.h>
  #include <ctype.h>
  #include <sys/types.h>
  #include <sys/socket.h>
  #include <stdio.h>
  #include <time.h>
  #include <arpa/inet.h>
  #include <vcl/sock_test.h>
  #ifndef VCL_TEST
  #include <sys/un.h>
  #endif
  
  typedef struct
  {
  #ifdef VCL_TEST
    vppcom_endpt_t server_endpt;
  #else
    int af_unix_echo_tx;
    int af_unix_echo_rx;
  #endif
    struct sockaddr_storage server_addr;
    uint32_t server_addr_size;
    sock_test_socket_t ctrl_socket;
    sock_test_socket_t *test_socket;
    uint32_t num_test_sockets;
    uint8_t dump_cfg;
  } sock_client_main_t;
  
  sock_client_main_t sock_client_main;
  
  
  static int
  sock_test_cfg_sync (sock_test_socket_t * socket)
  {
    sock_client_main_t *scm = &sock_client_main;
    sock_test_socket_t *ctrl = &scm->ctrl_socket;
    sock_test_cfg_t *rl_cfg = (sock_test_cfg_t *) socket->rxbuf;
    int rx_bytes, tx_bytes;
  
    if (socket->cfg.verbose)
      sock_test_cfg_dump (&socket->cfg, 1 /* is_client */ );
  
    tx_bytes = sock_test_write (socket->fd, (uint8_t *) & ctrl->cfg,
  			      sizeof (ctrl->cfg), NULL, ctrl->cfg.verbose);
    if (tx_bytes < 0)
      {
        fprintf (stderr, "CLIENT: ERROR: write test cfg failed (%d)!\n",
  	       tx_bytes);
        return tx_bytes;
      }
  
    rx_bytes = sock_test_read (socket->fd, (uint8_t *) socket->rxbuf,
  			     sizeof (sock_test_cfg_t), NULL);
    if (rx_bytes < 0)
      return rx_bytes;
  
    if (rl_cfg->magic != SOCK_TEST_CFG_CTRL_MAGIC)
      {
        fprintf (stderr, "CLIENT: ERROR: Bad server reply cfg -- aborting!\n");
        return -1;
      }
    if (socket->cfg.verbose)
      {
        printf ("CLIENT (fd %d): Got config back from server.\n", socket->fd);
        sock_test_cfg_dump (rl_cfg, 1 /* is_client */ );
      }
    if ((rx_bytes != sizeof (sock_test_cfg_t))
        || !sock_test_cfg_verify (rl_cfg, &ctrl->cfg))
      {
        fprintf (stderr, "CLIENT: ERROR: Invalid config received "
  	       "from server -- aborting!\n");
        sock_test_cfg_dump (rl_cfg, 1 /* is_client */ );
        return -1;
      }
    ctrl->cfg.ctrl_handle = ((ctrl->cfg.ctrl_handle == ~0) ?
  			   rl_cfg->ctrl_handle : ctrl->cfg.ctrl_handle);
  
    return 0;
  }
  
  static void
  echo_test_client ()
  {
    sock_client_main_t *scm = &sock_client_main;
    sock_test_socket_t *ctrl = &scm->ctrl_socket;
    sock_test_socket_t *tsock;
    int rx_bytes, tx_bytes, nbytes;
    uint32_t i, n;
    int rv;
    int nfds = 0;
    fd_set wr_fdset, rd_fdset;
    fd_set _wfdset, *wfdset = &_wfdset;
    fd_set _rfdset, *rfdset = &_rfdset;
  
    FD_ZERO (&wr_fdset);
    FD_ZERO (&rd_fdset);
    memset (&ctrl->stats, 0, sizeof (ctrl->stats));
    ctrl->cfg.total_bytes = nbytes = strlen (ctrl->txbuf) + 1;
    for (n = 0; n != ctrl->cfg.num_test_sockets; n++)
      {
        tsock = &scm->test_socket[n];
        tsock->cfg = ctrl->cfg;
        sock_test_socket_buf_alloc (tsock);
        sock_test_cfg_sync (tsock);
  
        memcpy (tsock->txbuf, ctrl->txbuf, nbytes);
        memset (&tsock->stats, 0, sizeof (tsock->stats));
  
        FD_SET (tsock->fd, &wr_fdset);
        FD_SET (tsock->fd, &rd_fdset);
        nfds = ((tsock->fd + 1) > nfds) ? (tsock->fd + 1) : nfds;
      }
  
    nfds++;
    clock_gettime (CLOCK_REALTIME, &ctrl->stats.start);
    while (n)
      {
        _wfdset = wr_fdset;
        _rfdset = rd_fdset;
  
  #ifdef VCL_TEST
        rv = vppcom_select (nfds, (uint64_t *) rfdset, (uint64_t *) wfdset,
  			  NULL, 0);
  #else
        {
  	struct timeval timeout;
  	timeout.tv_sec = 0;
  	timeout.tv_usec = 0;
  	rv = select (nfds, rfdset, wfdset, NULL, &timeout);
        }
  #endif
        if (rv < 0)
  	{
  	  perror ("select()");
  	  fprintf (stderr, "\nCLIENT: ERROR: select() failed -- "
  		   "aborting test!\n");
  	  return;
  	}
        else if (rv == 0)
  	continue;
  
        for (i = 0; i < ctrl->cfg.num_test_sockets; i++)
  	{
  	  tsock = &scm->test_socket[i];
  	  if (!((tsock->stats.stop.tv_sec == 0) &&
  		(tsock->stats.stop.tv_nsec == 0)))
  	    continue;
  
  	  if (FD_ISSET (tsock->fd, wfdset) &&
  	      (tsock->stats.tx_bytes < ctrl->cfg.total_bytes))
  
  	    {
  	      tx_bytes =
  		sock_test_write (tsock->fd, (uint8_t *) tsock->txbuf, nbytes,
  				 &tsock->stats, ctrl->cfg.verbose);
  	      if (tx_bytes < 0)
  		{
  		  fprintf (stderr, "\nCLIENT: ERROR: sock_test_write(%d) "
  			   "failed -- aborting test!\n", tsock->fd);
  		  return;
  		}
  
  	      printf ("CLIENT (fd %d): TX (%d bytes) - '%s'\n",
  		      tsock->fd, tx_bytes, tsock->txbuf);
  	    }
  
  	  if ((FD_ISSET (tsock->fd, rfdset)) &&
  	      (tsock->stats.rx_bytes < ctrl->cfg.total_bytes))
  	    {
  	      rx_bytes =
  		sock_test_read (tsock->fd, (uint8_t *) tsock->rxbuf,
  				nbytes, &tsock->stats);
  	      if (rx_bytes > 0)
  		{
  		  printf ("CLIENT (fd %d): RX (%d bytes) - '%s'\n",
  			  tsock->fd, rx_bytes, tsock->rxbuf);
  
  		  if (tsock->stats.rx_bytes != tsock->stats.tx_bytes)
  		    printf ("CLIENT: WARNING: bytes read (%lu) "
  			    "!= bytes written (%lu)!\n",
  			    tsock->stats.rx_bytes, tsock->stats.tx_bytes);
  		}
  	    }
  
  	  if (tsock->stats.rx_bytes >= ctrl->cfg.total_bytes)
  	    {
  	      clock_gettime (CLOCK_REALTIME, &tsock->stats.stop);
  	      n--;
  	    }
  	}
      }
    clock_gettime (CLOCK_REALTIME, &ctrl->stats.stop);
  
  #ifndef VCL_TEST
    {
      int fd, errno_val;
      struct sockaddr_un serveraddr;
      uint8_t buffer[256];
      size_t nbytes = strlen (SOCK_TEST_MIXED_EPOLL_DATA) + 1;
      struct timeval timeout;
  
      /* Open AF_UNIX socket and send an echo to test mixed epoll on server.
       */
      fd = socket (AF_UNIX, SOCK_STREAM, 0);
      if (fd < 0)
        {
  	errno_val = errno;
  	perror ("ERROR in echo_test_client(): socket(AF_UNIX) failed");
  	fprintf (stderr,
  		 "CLIENT: ERROR: socket(AF_UNIX, SOCK_STREAM, 0) failed "
  		 "(errno = %d)!\n", errno_val);
  	goto out;
        }
      memset (&serveraddr, 0, sizeof (serveraddr));
      serveraddr.sun_family = AF_UNIX;
      strcpy (serveraddr.sun_path, SOCK_TEST_AF_UNIX_FILENAME);
      rv = connect (fd, (struct sockaddr *) &serveraddr, SUN_LEN (&serveraddr));
      if (rv < 0)
        {
  	errno_val = errno;
  	perror ("ERROR in echo_test_client(): connect() failed");
  	fprintf (stderr, "CLIENT: ERROR: connect(fd %d, \"%s\", %lu) "
  		 "failed (errno = %d)!\n", fd, SOCK_TEST_AF_UNIX_FILENAME,
  		 SUN_LEN (&serveraddr), errno_val);
  	goto done;
        }
  
      scm->af_unix_echo_tx++;
      strcpy ((char *) buffer, SOCK_TEST_MIXED_EPOLL_DATA);
      timeout.tv_sec = 0;
      timeout.tv_usec = 250000;
      select (0, NULL, NULL, NULL, &timeout);	/* delay .25 secs */
      rv = write (fd, buffer, nbytes);
      if (rv < 0)
        {
  	errno_val = errno;
  	perror ("ERROR in echo_test_client(): write() failed");
  	fprintf (stderr, "CLIENT: ERROR: write(fd %d, \"%s\", %lu) "
  		 "failed (errno = %d)!\n", fd, buffer, nbytes, errno_val);
  	goto done;
        }
      else if (rv < nbytes)
        {
  	fprintf (stderr, "CLIENT: ERROR: write(fd %d, \"%s\", %lu) "
  		 "returned %d!\n", fd, buffer, nbytes, rv);
  	goto done;
        }
  
      printf ("CLIENT (AF_UNIX): TX (%d bytes) - '%s'\n", rv, buffer);
      memset (buffer, 0, sizeof (buffer));
      rv = read (fd, buffer, nbytes);
      if (rv < 0)
        {
  	errno_val = errno;
  	perror ("ERROR in echo_test_client(): read() failed");
  	fprintf (stderr, "CLIENT: ERROR: read(fd %d, %p, %lu) "
  		 "failed (errno = %d)!\n", fd, buffer, nbytes, errno_val);
  	goto done;
        }
      else if (rv < nbytes)
        {
  	fprintf (stderr, "CLIENT: ERROR: read(fd %d, %p, %lu) "
  		 "returned %d!\n", fd, buffer, nbytes, rv);
  	goto done;
        }
  
      if (!strncmp (SOCK_TEST_MIXED_EPOLL_DATA, (const char *) buffer, nbytes))
        {
  	printf ("CLIENT (AF_UNIX): RX (%d bytes) - '%s'\n", rv, buffer);
  	scm->af_unix_echo_rx++;
        }
      else
        printf ("CLIENT (AF_UNIX): ERROR: RX (%d bytes) - '%s'\n", rv, buffer);
  
    done:
      close (fd);
    out:
      ;
    }
  #endif
  
    for (i = 0; i < ctrl->cfg.num_test_sockets; i++)
      {
        tsock = &scm->test_socket[i];
        tsock->stats.start = ctrl->stats.start;
  
        if (ctrl->cfg.verbose)
  	{
  	  static char buf[64];
  
  	  sprintf (buf, "CLIENT (fd %d) RESULTS", tsock->fd);
  	  sock_test_stats_dump (buf, &tsock->stats,
  				1 /* show_rx */ , 1 /* show tx */ ,
  				ctrl->cfg.verbose);
  	}
  
        sock_test_stats_accumulate (&ctrl->stats, &tsock->stats);
      }
  
    if (ctrl->cfg.verbose)
      {
        sock_test_stats_dump ("CLIENT RESULTS", &ctrl->stats,
  			    1 /* show_rx */ , 1 /* show tx */ ,
  			    ctrl->cfg.verbose);
        sock_test_cfg_dump (&ctrl->cfg, 1 /* is_client */ );
  
        if (ctrl->cfg.verbose > 1)
  	{
  	  printf ("  ctrl socket info\n"
  		  SOCK_TEST_SEPARATOR_STRING
  		  "          fd:  %d (0x%08x)\n"
  		  "       rxbuf:  %p\n"
  		  "  rxbuf size:  %u (0x%08x)\n"
  		  "       txbuf:  %p\n"
  		  "  txbuf size:  %u (0x%08x)\n"
  		  SOCK_TEST_SEPARATOR_STRING,
  		  ctrl->fd, (uint32_t) ctrl->fd,
  		  ctrl->rxbuf, ctrl->rxbuf_size, ctrl->rxbuf_size,
  		  ctrl->txbuf, ctrl->txbuf_size, ctrl->txbuf_size);
  	}
      }
  }
  
  static void
  stream_test_client (sock_test_t test)
  {
    sock_client_main_t *scm = &sock_client_main;
    sock_test_socket_t *ctrl = &scm->ctrl_socket;
    sock_test_socket_t *tsock;
    int tx_bytes;
    uint32_t i, n;
    int rv;
    int nfds = 0;
    fd_set wr_fdset, rd_fdset;
    fd_set _wfdset, *wfdset = &_wfdset;
    fd_set _rfdset, *rfdset = (test == SOCK_TEST_TYPE_BI) ? &_rfdset : 0;
  
    ctrl->cfg.total_bytes = ctrl->cfg.num_writes * ctrl->cfg.txbuf_size;
    ctrl->cfg.ctrl_handle = ~0;
  
    printf ("\n" SOCK_TEST_BANNER_STRING
  	  "CLIENT (fd %d): %s-directional Stream Test!\n\n"
  	  "CLIENT (fd %d): Sending config to server on ctrl socket...\n",
  	  ctrl->fd, test == SOCK_TEST_TYPE_BI ? "Bi" : "Uni", ctrl->fd);
  
    if (sock_test_cfg_sync (ctrl))
      {
        fprintf (stderr, "CLIENT: ERROR: test cfg sync failed -- aborting!");
        return;
      }
  
    FD_ZERO (&wr_fdset);
    FD_ZERO (&rd_fdset);
    memset (&ctrl->stats, 0, sizeof (ctrl->stats));
    for (n = 0; n != ctrl->cfg.num_test_sockets; n++)
      {
        tsock = &scm->test_socket[n];
        tsock->cfg = ctrl->cfg;
        sock_test_socket_buf_alloc (tsock);
        printf ("CLIENT (fd %d): Sending config to server on "
  	      "test socket %d...\n", tsock->fd, n);
        sock_test_cfg_sync (tsock);
  
        /* Fill payload with incrementing uint32's */
        for (i = 0; i < tsock->txbuf_size; i++)
  	tsock->txbuf[i] = i & 0xff;
  
        memset (&tsock->stats, 0, sizeof (tsock->stats));
        FD_SET (tsock->fd, &wr_fdset);
        FD_SET (tsock->fd, &rd_fdset);
        nfds = ((tsock->fd + 1) > nfds) ? (tsock->fd + 1) : nfds;
      }
  
    nfds++;
    clock_gettime (CLOCK_REALTIME, &ctrl->stats.start);
    while (n)
      {
        _wfdset = wr_fdset;
        _rfdset = rd_fdset;
  
  #ifdef VCL_TEST
        rv = vppcom_select (nfds, (uint64_t *) rfdset, (uint64_t *) wfdset,
  			  NULL, 0);
  #else
        {
  	struct timeval timeout;
  	timeout.tv_sec = 0;
  	timeout.tv_usec = 0;
  	rv = select (nfds, rfdset, wfdset, NULL, &timeout);
        }
  #endif
        if (rv < 0)
  	{
  	  perror ("select()");
  	  fprintf (stderr, "\nCLIENT: ERROR: select() failed -- "
  		   "aborting test!\n");
  	  return;
  	}
        else if (rv == 0)
  	continue;
  
        for (i = 0; i < ctrl->cfg.num_test_sockets; i++)
  	{
  	  tsock = &scm->test_socket[i];
  	  if (!((tsock->stats.stop.tv_sec == 0) &&
  		(tsock->stats.stop.tv_nsec == 0)))
  	    continue;
  
  	  if ((test == SOCK_TEST_TYPE_BI) &&
  	      FD_ISSET (tsock->fd, rfdset) &&
  	      (tsock->stats.rx_bytes < ctrl->cfg.total_bytes))
  	    {
  	      (void) sock_test_read (tsock->fd,
  				     (uint8_t *) tsock->rxbuf,
  				     tsock->rxbuf_size, &tsock->stats);
  	    }
  
  	  if (FD_ISSET (tsock->fd, wfdset) &&
  	      (tsock->stats.tx_bytes < ctrl->cfg.total_bytes))
  	    {
  	      tx_bytes =
  		sock_test_write (tsock->fd, (uint8_t *) tsock->txbuf,
  				 ctrl->cfg.txbuf_size, &tsock->stats,
  				 ctrl->cfg.verbose);
  	      if (tx_bytes < 0)
  		{
  		  fprintf (stderr, "\nCLIENT: ERROR: sock_test_write(%d) "
  			   "failed -- aborting test!\n", tsock->fd);
  		  return;
  		}
  	    }
  
  	  if (((test == SOCK_TEST_TYPE_UNI) &&
  	       (tsock->stats.tx_bytes >= ctrl->cfg.total_bytes)) ||
  	      ((test == SOCK_TEST_TYPE_BI) &&
  	       (tsock->stats.rx_bytes >= ctrl->cfg.total_bytes)))
  	    {
  	      clock_gettime (CLOCK_REALTIME, &tsock->stats.stop);
  	      n--;
  	    }
  	}
      }
    clock_gettime (CLOCK_REALTIME, &ctrl->stats.stop);
  
    printf ("CLIENT (fd %d): Sending config to server on ctrl socket...\n",
  	  ctrl->fd);
  
    if (sock_test_cfg_sync (ctrl))
      {
        fprintf (stderr, "CLIENT: ERROR: test cfg sync failed -- aborting!");
        return;
      }
  
    for (i = 0; i < ctrl->cfg.num_test_sockets; i++)
      {
        tsock = &scm->test_socket[i];
  
        if (ctrl->cfg.verbose)
  	{
  	  static char buf[64];
  
  	  sprintf (buf, "CLIENT (fd %d) RESULTS", tsock->fd);
  	  sock_test_stats_dump (buf, &tsock->stats,
  				test == SOCK_TEST_TYPE_BI /* show_rx */ ,
  				1 /* show tx */ , ctrl->cfg.verbose);
  	}
  
        sock_test_stats_accumulate (&ctrl->stats, &tsock->stats);
      }
  
    sock_test_stats_dump ("CLIENT RESULTS", &ctrl->stats,
  			test == SOCK_TEST_TYPE_BI /* show_rx */ ,
  			1 /* show tx */ , ctrl->cfg.verbose);
    sock_test_cfg_dump (&ctrl->cfg, 1 /* is_client */ );
  
    if (ctrl->cfg.verbose)
      {
        printf ("  ctrl socket info\n"
  	      SOCK_TEST_SEPARATOR_STRING
  	      "          fd:  %d (0x%08x)\n"
  	      "       rxbuf:  %p\n"
  	      "  rxbuf size:  %u (0x%08x)\n"
  	      "       txbuf:  %p\n"
  	      "  txbuf size:  %u (0x%08x)\n"
  	      SOCK_TEST_SEPARATOR_STRING,
  	      ctrl->fd, (uint32_t) ctrl->fd,
  	      ctrl->rxbuf, ctrl->rxbuf_size, ctrl->rxbuf_size,
  	      ctrl->txbuf, ctrl->txbuf_size, ctrl->txbuf_size);
      }
  
    ctrl->cfg.test = SOCK_TEST_TYPE_ECHO;
    if (sock_test_cfg_sync (ctrl))
      fprintf (stderr, "CLIENT: ERROR: post-test cfg sync failed!");
  
    printf ("CLIENT (fd %d): %s-directional Stream Test Complete!\n"
  	  SOCK_TEST_BANNER_STRING "\n", ctrl->fd,
  	  test == SOCK_TEST_TYPE_BI ? "Bi" : "Uni");
  }
  
  static void
  exit_client (void)
  {
    sock_client_main_t *scm = &sock_client_main;
    sock_test_socket_t *ctrl = &scm->ctrl_socket;
    sock_test_socket_t *tsock;
    int i;
  
  #ifndef VCL_TEST
    printf ("CLIENT: af_unix_echo_tx %d, af_unix_echo_rx %d\n",
  	  scm->af_unix_echo_tx, scm->af_unix_echo_rx);
  #endif
    for (i = 0; i < ctrl->cfg.num_test_sockets; i++)
      {
        tsock = &scm->test_socket[i];
        tsock->cfg.test = SOCK_TEST_TYPE_EXIT;
  
        /* coverity[COPY_PASTE_ERROR] */
        if (ctrl->cfg.verbose)
  	{
  	  printf ("\nCLIENT (fd %d): Sending exit cfg to server...\n",
  		  tsock->fd);
  	  sock_test_cfg_dump (&tsock->cfg, 1 /* is_client */ );
  	}
        (void) sock_test_write (tsock->fd, (uint8_t *) & tsock->cfg,
  			      sizeof (tsock->cfg), &tsock->stats,
  			      ctrl->cfg.verbose);
      }
  
    ctrl->cfg.test = SOCK_TEST_TYPE_EXIT;
    if (ctrl->cfg.verbose)
      {
        printf ("\nCLIENT (fd %d): Sending exit cfg to server...\n", ctrl->fd);
        sock_test_cfg_dump (&ctrl->cfg, 1 /* is_client */ );
      }
    (void) sock_test_write (ctrl->fd, (uint8_t *) & ctrl->cfg,
  			  sizeof (ctrl->cfg), &ctrl->stats,
  			  ctrl->cfg.verbose);
    printf ("\nCLIENT: So long and thanks for all the fish!\n\n");
    sleep (1);
  }
  
  static int
  sock_test_connect_test_sockets (uint32_t num_test_sockets)
  {
    sock_client_main_t *scm = &sock_client_main;
    sock_test_socket_t *ctrl = &scm->ctrl_socket;
    sock_test_socket_t *tsock;
    int i, rv, errno_val;
  
    if (num_test_sockets < 1)
      {
        errno = EINVAL;
        return -1;
      }
  
    if (num_test_sockets < scm->num_test_sockets)
      {
        for (i = scm->num_test_sockets - 1; i >= num_test_sockets; i--)
  	{
  	  tsock = &scm->test_socket[i];
  #ifdef VCL_TEST
  	  vppcom_session_close (tsock->fd);
  #else
  	  close (tsock->fd);
  #endif
  	  free (tsock->txbuf);
  	  free (tsock->rxbuf);
  	}
      }
  
    else if (num_test_sockets > scm->num_test_sockets)
      {
        tsock = realloc (scm->test_socket,
  		       sizeof (sock_test_socket_t) * num_test_sockets);
        if (!tsock)
  	{
  	  errno_val = errno;
  	  perror ("ERROR in sock_test_connect_test_sockets()");
  	  fprintf (stderr, "CLIENT: ERROR: socket failed (errno = %d)!\n",
  		   errno_val);
  	  return -1;
  	}
  
        if (!scm->test_socket)
  	memset (tsock, 0, sizeof (*tsock));
  
        scm->test_socket = tsock;
        for (i = scm->num_test_sockets; i < num_test_sockets; i++)
  	{
  	  tsock = &scm->test_socket[i];
  #ifdef VCL_TEST
  	  tsock->fd = vppcom_session_create (ctrl->cfg.transport_udp ?
  					     VPPCOM_PROTO_UDP :
  					     VPPCOM_PROTO_TCP,
  					     1 /* is_nonblocking */ );
  	  if (tsock->fd < 0)
  	    {
  	      errno = -tsock->fd;
  	      tsock->fd = -1;
  	    }
  #else
  	  tsock->fd = socket (ctrl->cfg.address_ip6 ? AF_INET6 : AF_INET,
  			      ctrl->cfg.transport_udp ?
  			      SOCK_DGRAM : SOCK_STREAM, 0);
  #endif
  	  if (tsock->fd < 0)
  	    {
  	      errno_val = errno;
  	      perror ("ERROR in sock_test_connect_test_sockets()");
  	      fprintf (stderr, "CLIENT: ERROR: socket failed (errno = %d)!\n",
  		       errno_val);
  	      return tsock->fd;
  	    }
  
  #ifdef VCL_TEST
  	  rv = vppcom_session_connect (tsock->fd, &scm->server_endpt);
  	  if (rv)
  	    {
  	      errno = -rv;
  	      rv = -1;
  	    }
  #else
  	  rv =
  	    connect (tsock->fd, (struct sockaddr *) &scm->server_addr,
  		     scm->server_addr_size);
  #endif
  	  if (rv < 0)
  	    {
  	      errno_val = errno;
  	      perror ("ERROR in sock_test_connect_test_sockets()");
  	      fprintf (stderr, "CLIENT: ERROR: connect failed "
  		       "(errno = %d)!\n", errno_val);
  	      return -1;
  	    }
  	  tsock->cfg = ctrl->cfg;
  	  sock_test_socket_buf_alloc (tsock);
  	  sock_test_cfg_sync (tsock);
  
  	  printf ("CLIENT (fd %d): Test socket %d connected.\n",
  		  tsock->fd, i);
  	}
      }
  
    scm->num_test_sockets = num_test_sockets;
    printf ("CLIENT: All sockets (%d) connected!\n", scm->num_test_sockets + 1);
    return 0;
  }
  
  static void
  dump_help (void)
  {
  #define INDENT "\n  "
  
    printf ("CLIENT: Test configuration commands:"
  	  INDENT SOCK_TEST_TOKEN_HELP
  	  "\t\t\tDisplay help."
  	  INDENT SOCK_TEST_TOKEN_EXIT
  	  "\t\t\tExit test client & server."
  	  INDENT SOCK_TEST_TOKEN_SHOW_CFG
  	  "\t\t\tShow the current test cfg."
  	  INDENT SOCK_TEST_TOKEN_RUN_UNI
  	  "\t\t\tRun the Uni-directional test."
  	  INDENT SOCK_TEST_TOKEN_RUN_BI
  	  "\t\t\tRun the Bi-directional test."
  	  INDENT SOCK_TEST_TOKEN_VERBOSE
  	  "\t\t\tToggle verbose setting."
  	  INDENT SOCK_TEST_TOKEN_RXBUF_SIZE
  	  "<rxbuf size>\tRx buffer size (bytes)."
  	  INDENT SOCK_TEST_TOKEN_TXBUF_SIZE
  	  "<txbuf size>\tTx buffer size (bytes)."
  	  INDENT SOCK_TEST_TOKEN_NUM_WRITES
  	  "<# of writes>\tNumber of txbuf writes to server." "\n");
  }
  
  static void
  cfg_txbuf_size_set (void)
  {
    sock_client_main_t *scm = &sock_client_main;
    sock_test_socket_t *ctrl = &scm->ctrl_socket;
    char *p = ctrl->txbuf + strlen (SOCK_TEST_TOKEN_TXBUF_SIZE);
    uint64_t txbuf_size = strtoull ((const char *) p, NULL, 10);
  
    if (txbuf_size >= SOCK_TEST_CFG_BUF_SIZE_MIN)
      {
        ctrl->cfg.txbuf_size = txbuf_size;
        ctrl->cfg.total_bytes = ctrl->cfg.num_writes * ctrl->cfg.txbuf_size;
        sock_test_buf_alloc (&ctrl->cfg, 0 /* is_rxbuf */ ,
  			   (uint8_t **) & ctrl->txbuf, &ctrl->txbuf_size);
        sock_test_cfg_dump (&ctrl->cfg, 1 /* is_client */ );
      }
    else
      fprintf (stderr, "CLIENT: ERROR: Invalid txbuf size (%lu) < "
  	     "minimum buf size (%u)!\n",
  	     txbuf_size, SOCK_TEST_CFG_BUF_SIZE_MIN);
  }
  
  static void
  cfg_num_writes_set (void)
  {
    sock_client_main_t *scm = &sock_client_main;
    sock_test_socket_t *ctrl = &scm->ctrl_socket;
    char *p = ctrl->txbuf + strlen (SOCK_TEST_TOKEN_NUM_WRITES);
    uint32_t num_writes = strtoul ((const char *) p, NULL, 10);
  
    if (num_writes > 0)
      {
        ctrl->cfg.num_writes = num_writes;
        ctrl->cfg.total_bytes = ctrl->cfg.num_writes * ctrl->cfg.txbuf_size;
        sock_test_cfg_dump (&ctrl->cfg, 1 /* is_client */ );
      }
    else
      {
        fprintf (stderr, "CLIENT: ERROR: invalid num writes: %u\n", num_writes);
      }
  }
  
  static void
  cfg_num_test_sockets_set (void)
  {
    sock_client_main_t *scm = &sock_client_main;
    sock_test_socket_t *ctrl = &scm->ctrl_socket;
    char *p = ctrl->txbuf + strlen (SOCK_TEST_TOKEN_NUM_TEST_SCKTS);
    uint32_t num_test_sockets = strtoul ((const char *) p, NULL, 10);
  
    if ((num_test_sockets > 0) &&
        (num_test_sockets <= SOCK_TEST_CFG_MAX_TEST_SCKTS))
      {
        ctrl->cfg.num_test_sockets = num_test_sockets;
        sock_test_connect_test_sockets (num_test_sockets);
  
        sock_test_cfg_dump (&ctrl->cfg, 1 /* is_client */ );
      }
    else
      {
        fprintf (stderr, "CLIENT: ERROR: invalid num test sockets: "
  	       "%u, (%d max)\n",
  	       num_test_sockets, SOCK_TEST_CFG_MAX_TEST_SCKTS);
      }
  }
  
  static void
  cfg_rxbuf_size_set (void)
  {
    sock_client_main_t *scm = &sock_client_main;
    sock_test_socket_t *ctrl = &scm->ctrl_socket;
    char *p = ctrl->txbuf + strlen (SOCK_TEST_TOKEN_RXBUF_SIZE);
    uint64_t rxbuf_size = strtoull ((const char *) p, NULL, 10);
  
    if (rxbuf_size >= SOCK_TEST_CFG_BUF_SIZE_MIN)
      {
        ctrl->cfg.rxbuf_size = rxbuf_size;
        sock_test_buf_alloc (&ctrl->cfg, 1 /* is_rxbuf */ ,
  			   (uint8_t **) & ctrl->rxbuf, &ctrl->rxbuf_size);
        sock_test_cfg_dump (&ctrl->cfg, 1 /* is_client */ );
      }
    else
      fprintf (stderr, "CLIENT: ERROR: Invalid rxbuf size (%lu) < "
  	     "minimum buf size (%u)!\n",
  	     rxbuf_size, SOCK_TEST_CFG_BUF_SIZE_MIN);
  }
  
  static void
  cfg_verbose_toggle (void)
  {
    sock_client_main_t *scm = &sock_client_main;
    sock_test_socket_t *ctrl = &scm->ctrl_socket;
  
    ctrl->cfg.verbose = ctrl->cfg.verbose ? 0 : 1;
    sock_test_cfg_dump (&ctrl->cfg, 1 /* is_client */ );
  
  }
  
  static sock_test_t
  parse_input ()
  {
    sock_client_main_t *scm = &sock_client_main;
    sock_test_socket_t *ctrl = &scm->ctrl_socket;
    sock_test_t rv = SOCK_TEST_TYPE_NONE;
  
    if (!strcmp (SOCK_TEST_TOKEN_EXIT, ctrl->txbuf))
      rv = SOCK_TEST_TYPE_EXIT;
  
    else if (!strcmp (SOCK_TEST_TOKEN_HELP, ctrl->txbuf))
      dump_help ();
  
    else if (!strcmp (SOCK_TEST_TOKEN_SHOW_CFG, ctrl->txbuf))
      scm->dump_cfg = 1;
  
    else if (!strcmp (SOCK_TEST_TOKEN_VERBOSE, ctrl->txbuf))
      cfg_verbose_toggle ();
  
    else if (!strncmp (SOCK_TEST_TOKEN_TXBUF_SIZE, ctrl->txbuf,
  		     strlen (SOCK_TEST_TOKEN_TXBUF_SIZE)))
      cfg_txbuf_size_set ();
  
    else if (!strncmp (SOCK_TEST_TOKEN_NUM_TEST_SCKTS, ctrl->txbuf,
  		     strlen (SOCK_TEST_TOKEN_NUM_TEST_SCKTS)))
      cfg_num_test_sockets_set ();
  
    else if (!strncmp (SOCK_TEST_TOKEN_NUM_WRITES, ctrl->txbuf,
  		     strlen (SOCK_TEST_TOKEN_NUM_WRITES)))
      cfg_num_writes_set ();
  
    else if (!strncmp (SOCK_TEST_TOKEN_RXBUF_SIZE, ctrl->txbuf,
  		     strlen (SOCK_TEST_TOKEN_RXBUF_SIZE)))
      cfg_rxbuf_size_set ();
  
    else if (!strncmp (SOCK_TEST_TOKEN_RUN_UNI, ctrl->txbuf,
  		     strlen (SOCK_TEST_TOKEN_RUN_UNI)))
      rv = ctrl->cfg.test = SOCK_TEST_TYPE_UNI;
  
    else if (!strncmp (SOCK_TEST_TOKEN_RUN_BI, ctrl->txbuf,
  		     strlen (SOCK_TEST_TOKEN_RUN_BI)))
      rv = ctrl->cfg.test = SOCK_TEST_TYPE_BI;
  
    else
      rv = SOCK_TEST_TYPE_ECHO;
  
    return rv;
  }
  
  void
  print_usage_and_exit (void)
  {
    fprintf (stderr,
  	   "sock_test_client [OPTIONS] <ipaddr> <port>\n"
  	   "  OPTIONS\n"
  	   "  -h               Print this message and exit.\n"
  	   "  -6               Use IPv6\n"
  	   "  -u               Use UDP transport layer\n"
  	   "  -c               Print test config before test.\n"
  	   "  -w <dir>         Write test results to <dir>.\n"
  	   "  -X               Exit after running test.\n"
  	   "  -E               Run Echo test.\n"
  	   "  -N <num-writes>  Test Cfg: number of writes.\n"
  	   "  -R <rxbuf-size>  Test Cfg: rx buffer size.\n"
  	   "  -T <txbuf-size>  Test Cfg: tx buffer size.\n"
  	   "  -U               Run Uni-directional test.\n"
  	   "  -B               Run Bi-directional test.\n"
  	   "  -V               Verbose mode.\n");
    exit (1);
  }
  
  int
  main (int argc, char **argv)
  {
    sock_client_main_t *scm = &sock_client_main;
    sock_test_socket_t *ctrl = &scm->ctrl_socket;
    int c, rv, errno_val;
    sock_test_t post_test = SOCK_TEST_TYPE_NONE;
  
    sock_test_cfg_init (&ctrl->cfg);
    sock_test_socket_buf_alloc (ctrl);
  
    opterr = 0;
    while ((c = getopt (argc, argv, "chn:w:XE:I:N:R:T:UBV6D")) != -1)
      switch (c)
        {
        case 'c':
  	scm->dump_cfg = 1;
  	break;
  
        case 's':
  	if (sscanf (optarg, "0x%x", &ctrl->cfg.num_test_sockets) != 1)
  	  if (sscanf (optarg, "%u", &ctrl->cfg.num_test_sockets) != 1)
  	    {
  	      fprintf (stderr, "CLIENT: ERROR: Invalid value for "
  		       "option -%c!\n", c);
  	      print_usage_and_exit ();
  	    }
  	if (!ctrl->cfg.num_test_sockets ||
  	    (ctrl->cfg.num_test_sockets > FD_SETSIZE))
  	  {
  	    fprintf (stderr, "CLIENT: ERROR: Invalid number of "
  		     "sockets (%d) specified for option -%c!\n"
  		     "       Valid range is 1 - %d\n",
  		     ctrl->cfg.num_test_sockets, c, FD_SETSIZE);
  	    print_usage_and_exit ();
  	  }
  	break;
  
        case 'w':
  	fprintf (stderr, "CLIENT: Writing test results to files is TBD.\n");
  	break;
  
        case 'X':
  	post_test = SOCK_TEST_TYPE_EXIT;
  	break;
  
        case 'E':
  	if (strlen (optarg) > ctrl->txbuf_size)
  	  {
  	    fprintf (stderr, "CLIENT: ERROR: Option -%c value "
  		     "larger than txbuf size (%d)!\n",
  		     optopt, ctrl->txbuf_size);
  	    print_usage_and_exit ();
  	  }
  	strcpy (ctrl->txbuf, optarg);
  	ctrl->cfg.test = SOCK_TEST_TYPE_ECHO;
  	break;
  
        case 'I':
  	if (sscanf (optarg, "0x%x", &ctrl->cfg.num_test_sockets) != 1)
  	  if (sscanf (optarg, "%d", &ctrl->cfg.num_test_sockets) != 1)
  	    {
  	      fprintf (stderr, "CLIENT: ERROR: Invalid value for "
  		       "option -%c!\n", c);
  	      print_usage_and_exit ();
  	    }
  	if (ctrl->cfg.num_test_sockets > SOCK_TEST_CFG_MAX_TEST_SCKTS)
  	  {
  	    fprintf (stderr, "CLIENT: ERROR: value greater than max "
  		     "number test sockets (%d)!",
  		     SOCK_TEST_CFG_MAX_TEST_SCKTS);
  	    print_usage_and_exit ();
  	  }
  	break;
  
        case 'N':
  	if (sscanf (optarg, "0x%lx", &ctrl->cfg.num_writes) != 1)
  	  if (sscanf (optarg, "%ld", &ctrl->cfg.num_writes) != 1)
  	    {
  	      fprintf (stderr, "CLIENT: ERROR: Invalid value for "
  		       "option -%c!\n", c);
  	      print_usage_and_exit ();
  	    }
  	ctrl->cfg.total_bytes = ctrl->cfg.num_writes * ctrl->cfg.txbuf_size;
  	break;
  
        case 'R':
  	if (sscanf (optarg, "0x%lx", &ctrl->cfg.rxbuf_size) != 1)
  	  if (sscanf (optarg, "%ld", &ctrl->cfg.rxbuf_size) != 1)
  	    {
  	      fprintf (stderr, "CLIENT: ERROR: Invalid value for "
  		       "option -%c!\n", c);
  	      print_usage_and_exit ();
  	    }
  	if (ctrl->cfg.rxbuf_size >= SOCK_TEST_CFG_BUF_SIZE_MIN)
  	  {
  	    ctrl->rxbuf_size = ctrl->cfg.rxbuf_size;
  	    sock_test_buf_alloc (&ctrl->cfg, 1 /* is_rxbuf */ ,
  				 (uint8_t **) & ctrl->rxbuf,
  				 &ctrl->rxbuf_size);
  	  }
  	else
  	  {
  	    fprintf (stderr, "CLIENT: ERROR: rxbuf size (%lu) "
  		     "less than minumum (%u)\n",
  		     ctrl->cfg.rxbuf_size, SOCK_TEST_CFG_BUF_SIZE_MIN);
  	    print_usage_and_exit ();
  	  }
  
  	break;
  
        case 'T':
  	if (sscanf (optarg, "0x%lx", &ctrl->cfg.txbuf_size) != 1)
  	  if (sscanf (optarg, "%ld", &ctrl->cfg.txbuf_size) != 1)
  	    {
  	      fprintf (stderr, "CLIENT: ERROR: Invalid value "
  		       "for option -%c!\n", c);
  	      print_usage_and_exit ();
  	    }
  	if (ctrl->cfg.txbuf_size >= SOCK_TEST_CFG_BUF_SIZE_MIN)
  	  {
  	    ctrl->txbuf_size = ctrl->cfg.txbuf_size;
  	    sock_test_buf_alloc (&ctrl->cfg, 0 /* is_rxbuf */ ,
  				 (uint8_t **) & ctrl->txbuf,
  				 &ctrl->txbuf_size);
  	    ctrl->cfg.total_bytes =
  	      ctrl->cfg.num_writes * ctrl->cfg.txbuf_size;
  	  }
  	else
  	  {
  	    fprintf (stderr, "CLIENT: ERROR: txbuf size (%lu) "
  		     "less than minumum (%u)!\n",
  		     ctrl->cfg.txbuf_size, SOCK_TEST_CFG_BUF_SIZE_MIN);
  	    print_usage_and_exit ();
  	  }
  	break;
  
        case 'U':
  	ctrl->cfg.test = SOCK_TEST_TYPE_UNI;
  	break;
  
        case 'B':
  	ctrl->cfg.test = SOCK_TEST_TYPE_BI;
  	break;
  
        case 'V':
  	ctrl->cfg.verbose = 1;
  	break;
  
        case '6':
  	ctrl->cfg.address_ip6 = 1;
  	break;
  
        case 'D':
  	ctrl->cfg.transport_udp = 1;
  	break;
  
        case '?':
  	switch (optopt)
  	  {
  	  case 'E':
  	  case 'I':
  	  case 'N':
  	  case 'R':
  	  case 'T':
  	  case 'w':
  	    fprintf (stderr, "CLIENT: ERROR: Option -%c "
  		     "requires an argument.\n", optopt);
  	    break;
  
  	  default:
  	    if (isprint (optopt))
  	      fprintf (stderr, "CLIENT: ERROR: Unknown "
  		       "option `-%c'.\n", optopt);
  	    else
  	      fprintf (stderr, "CLIENT: ERROR: Unknown "
  		       "option character `\\x%x'.\n", optopt);
  	  }
  	/* fall thru */
        case 'h':
        default:
  	print_usage_and_exit ();
        }
  
    if (argc < (optind + 2))
      {
        fprintf (stderr, "CLIENT: ERROR: Insufficient number of arguments!\n");
        print_usage_and_exit ();
      }
  
  #ifdef VCL_TEST
    ctrl->fd = vppcom_app_create ("vcl_test_client");
    if (ctrl->fd < 0)
      {
        errno = -ctrl->fd;
        ctrl->fd = -1;
      }
    else
      {
        ctrl->fd = vppcom_session_create (ctrl->cfg.transport_udp ?
  					VPPCOM_PROTO_UDP :
  					VPPCOM_PROTO_TCP,
  					0 /* is_nonblocking */ );
        if (ctrl->fd < 0)
  	{
  	  errno = -ctrl->fd;
  	  ctrl->fd = -1;
  	}
      }
  #else
    ctrl->fd = socket (ctrl->cfg.address_ip6 ? AF_INET6 : AF_INET,
  		     ctrl->cfg.transport_udp ? SOCK_DGRAM : SOCK_STREAM, 0);
  #endif
  
    if (ctrl->fd < 0)
      {
        errno_val = errno;
        perror ("ERROR in main()");
        fprintf (stderr, "CLIENT: ERROR: socket "
  	       "failed (errno = %d)!\n", errno_val);
        return ctrl->fd;
      }
  
    memset (&scm->server_addr, 0, sizeof (scm->server_addr));
    if (ctrl->cfg.address_ip6)
      {
        struct sockaddr_in6 *server_addr =
  	(struct sockaddr_in6 *) &scm->server_addr;
        scm->server_addr_size = sizeof (*server_addr);
        server_addr->sin6_family = AF_INET6;
        inet_pton (AF_INET6, argv[optind++], &(server_addr->sin6_addr));
        server_addr->sin6_port = htons (atoi (argv[optind]));
      }
    else
      {
        struct sockaddr_in *server_addr =
  	(struct sockaddr_in *) &scm->server_addr;
        scm->server_addr_size = sizeof (*server_addr);
        server_addr->sin_family = AF_INET;
        inet_pton (AF_INET, argv[optind++], &(server_addr->sin_addr));
        server_addr->sin_port = htons (atoi (argv[optind]));
      }
  
  #ifdef VCL_TEST
    if (ctrl->cfg.address_ip6)
      {
        struct sockaddr_in6 *server_addr =
  	(struct sockaddr_in6 *) &scm->server_addr;
        scm->server_endpt.is_ip4 = 0;
        scm->server_endpt.ip = (uint8_t *) & server_addr->sin6_addr;
        scm->server_endpt.port = (uint16_t) server_addr->sin6_port;
      }
    else
      {
        struct sockaddr_in *server_addr =
  	(struct sockaddr_in *) &scm->server_addr;
        scm->server_endpt.is_ip4 = 1;
        scm->server_endpt.ip = (uint8_t *) & server_addr->sin_addr;
        scm->server_endpt.port = (uint16_t) server_addr->sin_port;
      }
  #endif
  
    do
      {
        printf ("\nCLIENT: Connecting to server...\n");
  
  #ifdef VCL_TEST
        rv = vppcom_session_connect (ctrl->fd, &scm->server_endpt);
        if (rv)
  	{
  	  errno = -rv;
  	  rv = -1;
  	}
  #else
        rv =
  	connect (ctrl->fd, (struct sockaddr *) &scm->server_addr,
  		 scm->server_addr_size);
  #endif
        if (rv < 0)
  	{
  	  errno_val = errno;
  	  perror ("ERROR in main()");
  	  fprintf (stderr, "CLIENT: ERROR: connect failed (errno = %d)!\n",
  		   errno_val);
  	  return -1;
  	}
  
        sock_test_cfg_sync (ctrl);
        printf ("CLIENT (fd %d): Control socket connected.\n", ctrl->fd);
      }
    while (rv < 0);
  
    sock_test_connect_test_sockets (ctrl->cfg.num_test_sockets);
  
    while (ctrl->cfg.test != SOCK_TEST_TYPE_EXIT)
      {
        if (scm->dump_cfg)
  	{
  	  sock_test_cfg_dump (&ctrl->cfg, 1 /* is_client */ );
  	  scm->dump_cfg = 0;
  	}
  
        switch (ctrl->cfg.test)
  	{
  	case SOCK_TEST_TYPE_ECHO:
  	  echo_test_client ();
  	  break;
  
  	case SOCK_TEST_TYPE_UNI:
  	case SOCK_TEST_TYPE_BI:
  	  stream_test_client (ctrl->cfg.test);
  	  break;
  
  	case SOCK_TEST_TYPE_EXIT:
  	  continue;
  
  	case SOCK_TEST_TYPE_NONE:
  	default:
  	  break;
  	}
        switch (post_test)
  	{
  	case SOCK_TEST_TYPE_EXIT:
  	  switch (ctrl->cfg.test)
  	    {
  	    case SOCK_TEST_TYPE_EXIT:
  	    case SOCK_TEST_TYPE_UNI:
  	    case SOCK_TEST_TYPE_BI:
  	    case SOCK_TEST_TYPE_ECHO:
  	      ctrl->cfg.test = SOCK_TEST_TYPE_EXIT;
  	      continue;
  
  	    case SOCK_TEST_TYPE_NONE:
  	    default:
  	      break;
  	    }
  	  break;
  
  	case SOCK_TEST_TYPE_NONE:
  	case SOCK_TEST_TYPE_ECHO:
  	case SOCK_TEST_TYPE_UNI:
  	case SOCK_TEST_TYPE_BI:
  	default:
  	  break;
  	}
  
        memset (ctrl->txbuf, 0, ctrl->txbuf_size);
        memset (ctrl->rxbuf, 0, ctrl->rxbuf_size);
  
        printf ("\nCLIENT: Type some characters and hit <return>\n"
  	      "('" SOCK_TEST_TOKEN_HELP "' for help): ");
  
        if (fgets (ctrl->txbuf, ctrl->txbuf_size, stdin) != NULL)
  	{
  	  if (strlen (ctrl->txbuf) == 1)
  	    {
  	      printf ("\nCLIENT: Nothing to send!  Please try again...\n");
  	      continue;
  	    }
  	  ctrl->txbuf[strlen (ctrl->txbuf) - 1] = 0;	// chomp the newline.
  
  	  /* Parse input for keywords */
  	  ctrl->cfg.test = parse_input ();
  	}
      }
  
    exit_client ();
  #ifdef VCL_TEST
    vppcom_session_close (ctrl->fd);
    vppcom_app_destroy ();
    return 0;
  #else
    close (ctrl->fd);
    return (scm->af_unix_echo_tx == scm->af_unix_echo_rx) ? 0 : -1;
  #endif
  }
  
  /*
   * fd.io coding-style-patch-verification: ON
   *
   * Local Variables:
   * eval: (c-set-style "gnu")
   * End:
   */
  