text: /*
   * Copyright (c) 2017-2019 Cisco and/or its affiliates.
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at:
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #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 <hs_apps/vcl/sock_test.h>
  #include <fcntl.h>
  #include <sys/un.h>
  
  typedef struct
  {
    int af_unix_echo_tx;
    int af_unix_echo_rx;
    struct sockaddr_storage server_addr;
    uint32_t server_addr_size;
    uint32_t cfg_seq_num;
    vcl_test_session_t ctrl_socket;
    vcl_test_session_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 (vcl_test_session_t * socket)
  {
    sock_client_main_t *scm = &sock_client_main;
    vcl_test_session_t *ctrl = &scm->ctrl_socket;
    vcl_test_cfg_t *rl_cfg = (vcl_test_cfg_t *) socket->rxbuf;
    int rx_bytes, tx_bytes;
  
    if (socket->cfg.verbose)
      vcl_test_cfg_dump (&socket->cfg, 1 /* is_client */ );
  
    ctrl->cfg.seq_num = ++scm->cfg_seq_num;
    if (socket->cfg.verbose)
      {
        stinf ("(fd %d): Sending config sent to server.\n", socket->fd);
        vcl_test_cfg_dump (&ctrl->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)
      stabrt ("(fd %d): write test cfg failed (%d)!", socket->fd, tx_bytes);
  
    rx_bytes = sock_test_read (socket->fd, (uint8_t *) socket->rxbuf,
  			     sizeof (vcl_test_cfg_t), NULL);
    if (rx_bytes < 0)
      return rx_bytes;
  
    if (rl_cfg->magic != VCL_TEST_CFG_CTRL_MAGIC)
      stabrt ("(fd %d): Bad server reply cfg -- aborting!\n", socket->fd);
  
    if ((rx_bytes != sizeof (vcl_test_cfg_t))
        || !vcl_test_cfg_verify (rl_cfg, &ctrl->cfg))
      stabrt ("(fd %d): Invalid config received from server!\n", socket->fd);
  
    if (socket->cfg.verbose)
      {
        stinf ("(fd %d): Got config back from server.", socket->fd);
        vcl_test_cfg_dump (rl_cfg, 1 /* is_client */ );
      }
    ctrl->cfg.ctrl_handle = ((ctrl->cfg.ctrl_handle == ~0) ?
  			   rl_cfg->ctrl_handle : ctrl->cfg.ctrl_handle);
  
    return 0;
  }
  
  static void
  sock_client_echo_af_unix (sock_client_main_t * scm)
  {
    int fd, rv;
    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)
      stfail ("socket()");
  
    memset (&serveraddr, 0, sizeof (serveraddr));
    serveraddr.sun_family = AF_UNIX;
    strncpy (serveraddr.sun_path, SOCK_TEST_AF_UNIX_FILENAME,
  	   sizeof (serveraddr.sun_path));
    rv = connect (fd, (struct sockaddr *) &serveraddr, SUN_LEN (&serveraddr));
    if (rv < 0)
      stfail ("connect()");
  
    scm->af_unix_echo_tx++;
    strncpy ((char *) buffer, SOCK_TEST_MIXED_EPOLL_DATA, sizeof (buffer));
    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)
      stfail ("write()");
  
    if (rv < nbytes)
      stabrt ("write(fd %d, \"%s\", %lu) returned %d!", fd, buffer, nbytes, rv);
  
    stinf ("(AF_UNIX): TX (%d bytes) - '%s'\n", rv, buffer);
    memset (buffer, 0, sizeof (buffer));
    rv = read (fd, buffer, nbytes);
    if (rv < 0)
      stfail ("read()");
  
    if (rv < nbytes)
      stabrt ("read(fd %d, %p, %lu) returned %d!\n", fd, buffer, nbytes, rv);
  
    if (!strncmp (SOCK_TEST_MIXED_EPOLL_DATA, (const char *) buffer, nbytes))
      {
        stinf ("(AF_UNIX): RX (%d bytes) - '%s'\n", rv, buffer);
        scm->af_unix_echo_rx++;
      }
    else
      stabrt ("(AF_UNIX): RX (%d bytes) - '%s'\n", rv, buffer);
  
    close (fd);
  }
  
  static void
  echo_test_client (void)
  {
    sock_client_main_t *scm = &sock_client_main;
    vcl_test_session_t *ctrl = &scm->ctrl_socket;
    vcl_test_session_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_sessions; n++)
      {
        tsock = &scm->test_socket[n];
        tsock->cfg = ctrl->cfg;
        vcl_test_session_buf_alloc (tsock);
        if (sock_test_cfg_sync (tsock))
  	return;
  
        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;
  
        struct timeval timeout;
        timeout.tv_sec = 0;
        timeout.tv_usec = 0;
        rv = select (nfds, rfdset, wfdset, NULL, &timeout);
  
        if (rv < 0)
  	stfail ("select()");
  
        if (rv == 0)
  	continue;
  
        for (i = 0; i < ctrl->cfg.num_test_sessions; 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)
  		stabrt ("sock_test_write(%d) failed -- aborting test!",
  			tsock->fd);
  
  	      stinf ("(fd %d): TX (%d bytes) - '%s'", 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)
  		{
  		  stinf ("(fd %d): RX (%d bytes)\n", tsock->fd, rx_bytes);
  
  		  if (tsock->stats.rx_bytes != tsock->stats.tx_bytes)
  		    stinf ("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);
  
    sock_client_echo_af_unix (scm);
  
    for (i = 0; i < ctrl->cfg.num_test_sessions; i++)
      {
        tsock = &scm->test_socket[i];
        tsock->stats.start = ctrl->stats.start;
  
        if (ctrl->cfg.verbose)
  	{
  	  static char buf[64];
  
  	  snprintf (buf, sizeof (buf), "CLIENT (fd %d) RESULTS", tsock->fd);
  	  vcl_test_stats_dump (buf, &tsock->stats,
  			       1 /* show_rx */ , 1 /* show tx */ ,
  			       ctrl->cfg.verbose);
  	}
  
        vcl_test_stats_accumulate (&ctrl->stats, &tsock->stats);
      }
  
    if (ctrl->cfg.verbose)
      {
        vcl_test_stats_dump ("CLIENT RESULTS", &ctrl->stats,
  			   1 /* show_rx */ , 1 /* show tx */ ,
  			   ctrl->cfg.verbose);
        vcl_test_cfg_dump (&ctrl->cfg, 1 /* is_client */ );
  
        if (ctrl->cfg.verbose > 1)
  	{
  	  stinf ("  ctrl socket info\n"
  		 VCL_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"
  		 VCL_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 (vcl_test_t test)
  {
    sock_client_main_t *scm = &sock_client_main;
    vcl_test_session_t *ctrl = &scm->ctrl_socket;
    vcl_test_session_t *tsock;
    int tx_bytes, rv, nfds = 0;;
    uint32_t i, n;
    fd_set wr_fdset, rd_fdset;
    fd_set _wfdset, *wfdset = &_wfdset;
    fd_set _rfdset, *rfdset = (test == VCL_TEST_TYPE_BI) ? &_rfdset : 0;
  
    ctrl->cfg.total_bytes = ctrl->cfg.num_writes * ctrl->cfg.txbuf_size;
    ctrl->cfg.ctrl_handle = ~0;
  
    stinf ("\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 == VCL_TEST_TYPE_BI ? "Bi" : "Uni", ctrl->fd);
  
    if (sock_test_cfg_sync (ctrl))
      stabrt ("test cfg sync failed -- aborting!");
  
    FD_ZERO (&wr_fdset);
    FD_ZERO (&rd_fdset);
    memset (&ctrl->stats, 0, sizeof (ctrl->stats));
    for (n = 0; n != ctrl->cfg.num_test_sessions; n++)
      {
        tsock = &scm->test_socket[n];
        tsock->cfg = ctrl->cfg;
        vcl_test_session_buf_alloc (tsock);
        stinf ("(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;
  
        struct timeval timeout;
        timeout.tv_sec = 0;
        timeout.tv_usec = 0;
        rv = select (nfds, rfdset, wfdset, NULL, &timeout);
  
        if (rv < 0)
  	stfail ("select()");
  
        if (rv == 0)
  	continue;
  
        for (i = 0; i < ctrl->cfg.num_test_sessions; i++)
  	{
  	  tsock = &scm->test_socket[i];
  	  if (!((tsock->stats.stop.tv_sec == 0) &&
  		(tsock->stats.stop.tv_nsec == 0)))
  	    continue;
  
  	  if ((test == VCL_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)
  		stabrt ("sock_test_write(%d) failed -- aborting test!",
  			tsock->fd);
  	    }
  
  	  if (((test == VCL_TEST_TYPE_UNI) &&
  	       (tsock->stats.tx_bytes >= ctrl->cfg.total_bytes)) ||
  	      ((test == VCL_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);
  
    stinf ("(fd %d): Sending config to server on ctrl socket...\n", ctrl->fd);
  
    if (sock_test_cfg_sync (ctrl))
      stabrt ("test cfg sync failed -- aborting!");
  
    for (i = 0; i < ctrl->cfg.num_test_sessions; i++)
      {
        tsock = &scm->test_socket[i];
  
        if (ctrl->cfg.verbose)
  	{
  	  static char buf[64];
  
  	  snprintf (buf, sizeof (buf), "CLIENT (fd %d) RESULTS", tsock->fd);
  	  vcl_test_stats_dump (buf, &tsock->stats,
  			       test == VCL_TEST_TYPE_BI /* show_rx */ ,
  			       1 /* show tx */ , ctrl->cfg.verbose);
  	}
  
        vcl_test_stats_accumulate (&ctrl->stats, &tsock->stats);
      }
  
    vcl_test_stats_dump ("CLIENT RESULTS", &ctrl->stats,
  		       test == VCL_TEST_TYPE_BI /* show_rx */ ,
  		       1 /* show tx */ , ctrl->cfg.verbose);
    vcl_test_cfg_dump (&ctrl->cfg, 1 /* is_client */ );
  
    if (ctrl->cfg.verbose)
      {
        stinf ("  ctrl socket info\n"
  	     VCL_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"
  	     VCL_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 = VCL_TEST_TYPE_ECHO;
    if (sock_test_cfg_sync (ctrl))
      stabrt ("post-test cfg sync failed!");
  
    stinf ("(fd %d): %s-directional Stream Test Complete!\n"
  	 SOCK_TEST_BANNER_STRING "\n", ctrl->fd,
  	 test == VCL_TEST_TYPE_BI ? "Bi" : "Uni");
  }
  
  static void
  exit_client (void)
  {
    sock_client_main_t *scm = &sock_client_main;
    vcl_test_session_t *ctrl = &scm->ctrl_socket;
    vcl_test_session_t *tsock;
    int i;
  
    stinf ("af_unix_echo_tx %d, af_unix_echo_rx %d\n",
  	 scm->af_unix_echo_tx, scm->af_unix_echo_rx);
    for (i = 0; i < ctrl->cfg.num_test_sessions; i++)
      {
        tsock = &scm->test_socket[i];
        tsock->cfg.test = VCL_TEST_TYPE_EXIT;
  
        /* coverity[COPY_PASTE_ERROR] */
        if (ctrl->cfg.verbose)
  	{
  	  stinf ("\(fd %d): Sending exit cfg to server...\n", tsock->fd);
  	  vcl_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 = VCL_TEST_TYPE_EXIT;
    if (ctrl->cfg.verbose)
      {
        stinf ("\n(fd %d): Sending exit cfg to server...\n", ctrl->fd);
        vcl_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);
    stinf ("\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;
    vcl_test_session_t *ctrl = &scm->ctrl_socket;
    vcl_test_session_t *tsock;
    int i, rv;
  
    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];
  	  close (tsock->fd);
  	  free (tsock->txbuf);
  	  free (tsock->rxbuf);
  	}
      }
  
    else if (num_test_sockets > scm->num_test_sockets)
      {
        tsock = realloc (scm->test_socket,
  		       sizeof (vcl_test_session_t) * num_test_sockets);
        if (!tsock)
  	stfail ("realloc()");
  
        memset (&tsock[scm->num_test_sockets], 0,
  	      sizeof (vcl_test_session_t) * (num_test_sockets -
  					     scm->num_test_sockets));
  
        scm->test_socket = tsock;
        for (i = scm->num_test_sockets; i < num_test_sockets; i++)
  	{
  	  tsock = &scm->test_socket[i];
  	  tsock->fd = socket (ctrl->cfg.address_ip6 ? AF_INET6 : AF_INET,
  			      ctrl->cfg.transport_udp ?
  			      SOCK_DGRAM : SOCK_STREAM, 0);
  
  	  if (tsock->fd < 0)
  	    stfail ("socket()");
  
  	  rv = connect (tsock->fd, (struct sockaddr *) &scm->server_addr,
  			scm->server_addr_size);
  
  	  if (rv < 0)
  	    stfail ("connect()");
  
  	  if (fcntl (tsock->fd, F_SETFL, O_NONBLOCK) < 0)
  	    stfail ("fcntl");
  
  	  tsock->cfg = ctrl->cfg;
  	  vcl_test_session_buf_alloc (tsock);
  	  sock_test_cfg_sync (tsock);
  
  	  stinf ("(fd %d): Test socket %d connected", tsock->fd, i);
  	}
      }
  
    scm->num_test_sockets = num_test_sockets;
    stinf ("All sockets (%d) connected!\n", scm->num_test_sockets + 1);
    return 0;
  }
  
  static void
  cfg_txbuf_size_set (void)
  {
    sock_client_main_t *scm = &sock_client_main;
    vcl_test_session_t *ctrl = &scm->ctrl_socket;
    char *p = ctrl->txbuf + strlen (VCL_TEST_TOKEN_TXBUF_SIZE);
    uint64_t txbuf_size = strtoull ((const char *) p, NULL, 10);
  
    if (txbuf_size >= VCL_TEST_CFG_BUF_SIZE_MIN)
      {
        ctrl->cfg.txbuf_size = txbuf_size;
        ctrl->cfg.total_bytes = ctrl->cfg.num_writes * ctrl->cfg.txbuf_size;
        vcl_test_buf_alloc (&ctrl->cfg, 0 /* is_rxbuf */ ,
  			  (uint8_t **) & ctrl->txbuf, &ctrl->txbuf_size);
        vcl_test_cfg_dump (&ctrl->cfg, 1 /* is_client */ );
      }
    else
      stabrt ("Invalid txbuf size (%lu) < minimum buf size (%u)!",
  	    txbuf_size, VCL_TEST_CFG_BUF_SIZE_MIN);
  }
  
  static void
  cfg_num_writes_set (void)
  {
    sock_client_main_t *scm = &sock_client_main;
    vcl_test_session_t *ctrl = &scm->ctrl_socket;
    char *p = ctrl->txbuf + strlen (VCL_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;
        vcl_test_cfg_dump (&ctrl->cfg, 1 /* is_client */ );
      }
    else
      stabrt ("Invalid num writes: %u", num_writes);
  }
  
  static void
  cfg_num_test_sockets_set (void)
  {
    sock_client_main_t *scm = &sock_client_main;
    vcl_test_session_t *ctrl = &scm->ctrl_socket;
    char *p = ctrl->txbuf + strlen (VCL_TEST_TOKEN_NUM_TEST_SESS);
    uint32_t num_test_sockets = strtoul ((const char *) p, NULL, 10);
  
    if ((num_test_sockets > 0) &&
        (num_test_sockets <= VCL_TEST_CFG_MAX_TEST_SESS))
      {
        ctrl->cfg.num_test_sessions = num_test_sockets;
        sock_test_connect_test_sockets (num_test_sockets);
  
        vcl_test_cfg_dump (&ctrl->cfg, 1 /* is_client */ );
      }
    else
      stabrt ("Invalid num test sockets: %u, (%d max)\n", num_test_sockets,
  	    VCL_TEST_CFG_MAX_TEST_SESS);
  }
  
  static void
  cfg_rxbuf_size_set (void)
  {
    sock_client_main_t *scm = &sock_client_main;
    vcl_test_session_t *ctrl = &scm->ctrl_socket;
    char *p = ctrl->txbuf + strlen (VCL_TEST_TOKEN_RXBUF_SIZE);
    uint64_t rxbuf_size = strtoull ((const char *) p, NULL, 10);
  
    if (rxbuf_size >= VCL_TEST_CFG_BUF_SIZE_MIN)
      {
        ctrl->cfg.rxbuf_size = rxbuf_size;
        vcl_test_buf_alloc (&ctrl->cfg, 1 /* is_rxbuf */ ,
  			  (uint8_t **) & ctrl->rxbuf, &ctrl->rxbuf_size);
        vcl_test_cfg_dump (&ctrl->cfg, 1 /* is_client */ );
      }
    else
      stabrt ("Invalid rxbuf size (%lu) < minimum buf size (%u)!",
  	    rxbuf_size, VCL_TEST_CFG_BUF_SIZE_MIN);
  }
  
  static void
  cfg_verbose_toggle (void)
  {
    sock_client_main_t *scm = &sock_client_main;
    vcl_test_session_t *ctrl = &scm->ctrl_socket;
  
    ctrl->cfg.verbose = ctrl->cfg.verbose ? 0 : 1;
    vcl_test_cfg_dump (&ctrl->cfg, 1 /* is_client */ );
  }
  
  static vcl_test_t
  parse_input ()
  {
    sock_client_main_t *scm = &sock_client_main;
    vcl_test_session_t *ctrl = &scm->ctrl_socket;
    vcl_test_t rv = VCL_TEST_TYPE_NONE;
  
    if (!strncmp (VCL_TEST_TOKEN_EXIT, ctrl->txbuf,
  		strlen (VCL_TEST_TOKEN_EXIT)))
      rv = VCL_TEST_TYPE_EXIT;
  
    else if (!strncmp (VCL_TEST_TOKEN_HELP, ctrl->txbuf,
  		     strlen (VCL_TEST_TOKEN_HELP)))
      dump_help ();
  
    else if (!strncmp (VCL_TEST_TOKEN_SHOW_CFG, ctrl->txbuf,
  		     strlen (VCL_TEST_TOKEN_SHOW_CFG)))
      scm->dump_cfg = 1;
  
    else if (!strncmp (VCL_TEST_TOKEN_VERBOSE, ctrl->txbuf,
  		     strlen (VCL_TEST_TOKEN_VERBOSE)))
      cfg_verbose_toggle ();
  
    else if (!strncmp (VCL_TEST_TOKEN_TXBUF_SIZE, ctrl->txbuf,
  		     strlen (VCL_TEST_TOKEN_TXBUF_SIZE)))
      cfg_txbuf_size_set ();
  
    else if (!strncmp (VCL_TEST_TOKEN_NUM_TEST_SESS, ctrl->txbuf,
  		     strlen (VCL_TEST_TOKEN_NUM_TEST_SESS)))
      cfg_num_test_sockets_set ();
  
    else if (!strncmp (VCL_TEST_TOKEN_NUM_WRITES, ctrl->txbuf,
  		     strlen (VCL_TEST_TOKEN_NUM_WRITES)))
      cfg_num_writes_set ();
  
    else if (!strncmp (VCL_TEST_TOKEN_RXBUF_SIZE, ctrl->txbuf,
  		     strlen (VCL_TEST_TOKEN_RXBUF_SIZE)))
      cfg_rxbuf_size_set ();
  
    else if (!strncmp (VCL_TEST_TOKEN_RUN_UNI, ctrl->txbuf,
  		     strlen (VCL_TEST_TOKEN_RUN_UNI)))
      rv = ctrl->cfg.test = VCL_TEST_TYPE_UNI;
  
    else if (!strncmp (VCL_TEST_TOKEN_RUN_BI, ctrl->txbuf,
  		     strlen (VCL_TEST_TOKEN_RUN_BI)))
      rv = ctrl->cfg.test = VCL_TEST_TYPE_BI;
  
    else
      rv = VCL_TEST_TYPE_ECHO;
  
    return rv;
  }
  
  void
  print_usage_and_exit (void)
  {
    stinf ("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;
    vcl_test_session_t *ctrl = &scm->ctrl_socket;
    int c, rv;
    vcl_test_t post_test = VCL_TEST_TYPE_NONE;
  
    vcl_test_cfg_init (&ctrl->cfg);
    vcl_test_session_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_sessions) != 1)
  	  if (sscanf (optarg, "%u", &ctrl->cfg.num_test_sessions) != 1)
  	    {
  	      stinf ("ERROR: Invalid value for option -%c!", c);
  	      print_usage_and_exit ();
  	    }
  	if (!ctrl->cfg.num_test_sessions ||
  	    (ctrl->cfg.num_test_sessions > FD_SETSIZE))
  	  {
  	    stinf ("ERROR: Invalid number of "
  		   "sockets (%d) specified for option -%c!\n"
  		   "       Valid range is 1 - %d\n",
  		   ctrl->cfg.num_test_sessions, c, FD_SETSIZE);
  	    print_usage_and_exit ();
  	  }
  	break;
  
        case 'w':
  	stinf ("Writing test results to files is TBD.\n");
  	break;
  
        case 'X':
  	post_test = VCL_TEST_TYPE_EXIT;
  	break;
  
        case 'E':
  	if (strlen (optarg) > ctrl->txbuf_size)
  	  {
  	    stinf ("ERROR: Option -%c value larger than txbuf size (%d)!",
  		   optopt, ctrl->txbuf_size);
  	    print_usage_and_exit ();
  	  }
  	strncpy (ctrl->txbuf, optarg, ctrl->txbuf_size);
  	ctrl->cfg.test = VCL_TEST_TYPE_ECHO;
  	break;
  
        case 'I':
  	if (sscanf (optarg, "0x%x", &ctrl->cfg.num_test_sessions) != 1)
  	  if (sscanf (optarg, "%d", &ctrl->cfg.num_test_sessions) != 1)
  	    {
  	      stinf ("ERROR: Invalid value for option -%c!\n", c);
  	      print_usage_and_exit ();
  	    }
  	if (ctrl->cfg.num_test_sessions > VCL_TEST_CFG_MAX_TEST_SESS)
  	  {
  	    stinf ("ERROR: value greater than max number test sockets (%d)!",
  		   VCL_TEST_CFG_MAX_TEST_SESS);
  	    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)
  	    {
  	      stinf ("ERROR: Invalid value for option -%c!", 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)
  	    {
  	      stinf ("ERROR: Invalid value for option -%c!", c);
  	      print_usage_and_exit ();
  	    }
  	if (ctrl->cfg.rxbuf_size >= VCL_TEST_CFG_BUF_SIZE_MIN)
  	  {
  	    ctrl->rxbuf_size = ctrl->cfg.rxbuf_size;
  	    vcl_test_buf_alloc (&ctrl->cfg, 1 /* is_rxbuf */ ,
  				(uint8_t **) & ctrl->rxbuf,
  				&ctrl->rxbuf_size);
  	  }
  	else
  	  {
  	    stinf ("ERROR: rxbuf size (%lu) less than minumum (%u)\n",
  		   ctrl->cfg.rxbuf_size, VCL_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)
  	    {
  	      stinf ("ERROR: Invalid value for option -%c!", c);
  	      print_usage_and_exit ();
  	    }
  	if (ctrl->cfg.txbuf_size >= VCL_TEST_CFG_BUF_SIZE_MIN)
  	  {
  	    ctrl->txbuf_size = ctrl->cfg.txbuf_size;
  	    vcl_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
  	  {
  	    stinf ("ERROR: txbuf size (%lu) less than minumum (%u)!",
  		   ctrl->cfg.txbuf_size, VCL_TEST_CFG_BUF_SIZE_MIN);
  	    print_usage_and_exit ();
  	  }
  	break;
  
        case 'U':
  	ctrl->cfg.test = VCL_TEST_TYPE_UNI;
  	break;
  
        case 'B':
  	ctrl->cfg.test = VCL_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':
  	    stinf ("ERROR: Option -%c requires an argument.\n", optopt);
  	    break;
  
  	  default:
  	    if (isprint (optopt))
  	      stinf ("ERROR: Unknown option `-%c'.\n", optopt);
  	    else
  	      stinf ("ERROR: Unknown option character `\\x%x'.\n", optopt);
  	  }
  	/* fall thru */
        case 'h':
        default:
  	print_usage_and_exit ();
        }
  
    if (argc < (optind + 2))
      {
        stinf ("ERROR: Insufficient number of arguments!\n");
        print_usage_and_exit ();
      }
  
    ctrl->fd = socket (ctrl->cfg.address_ip6 ? AF_INET6 : AF_INET,
  		     ctrl->cfg.transport_udp ? SOCK_DGRAM : SOCK_STREAM, 0);
  
    if (ctrl->fd < 0)
      stfail ("socket()");
  
    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]));
      }
  
    do
      {
        stinf ("\nConnecting to server...\n");
  
        rv = connect (ctrl->fd, (struct sockaddr *) &scm->server_addr,
  		    scm->server_addr_size);
  
        if (rv < 0)
  	stfail ("connect()");
  
        sock_test_cfg_sync (ctrl);
        stinf ("(fd %d): Control socket connected.\n", ctrl->fd);
      }
    while (rv < 0);
  
    sock_test_connect_test_sockets (ctrl->cfg.num_test_sessions);
  
    while (ctrl->cfg.test != VCL_TEST_TYPE_EXIT)
      {
        if (scm->dump_cfg)
  	{
  	  vcl_test_cfg_dump (&ctrl->cfg, 1 /* is_client */ );
  	  scm->dump_cfg = 0;
  	}
  
        switch (ctrl->cfg.test)
  	{
  	case VCL_TEST_TYPE_ECHO:
  	  echo_test_client ();
  	  break;
  
  	case VCL_TEST_TYPE_UNI:
  	case VCL_TEST_TYPE_BI:
  	  stream_test_client (ctrl->cfg.test);
  	  break;
  
  	case VCL_TEST_TYPE_EXIT:
  	  continue;
  
  	case VCL_TEST_TYPE_NONE:
  	default:
  	  break;
  	}
        switch (post_test)
  	{
  	case VCL_TEST_TYPE_EXIT:
  	  switch (ctrl->cfg.test)
  	    {
  	    case VCL_TEST_TYPE_EXIT:
  	    case VCL_TEST_TYPE_UNI:
  	    case VCL_TEST_TYPE_BI:
  	    case VCL_TEST_TYPE_ECHO:
  	      ctrl->cfg.test = VCL_TEST_TYPE_EXIT;
  	      continue;
  
  	    case VCL_TEST_TYPE_NONE:
  	    default:
  	      break;
  	    }
  	  break;
  
  	case VCL_TEST_TYPE_NONE:
  	case VCL_TEST_TYPE_ECHO:
  	case VCL_TEST_TYPE_UNI:
  	case VCL_TEST_TYPE_BI:
  	default:
  	  break;
  	}
  
        memset (ctrl->txbuf, 0, ctrl->txbuf_size);
        memset (ctrl->rxbuf, 0, ctrl->rxbuf_size);
  
        stinf ("\nType some characters and hit <return>\n"
  	     "('" VCL_TEST_TOKEN_HELP "' for help): ");
  
        if (fgets (ctrl->txbuf, ctrl->txbuf_size, stdin) != NULL)
  	{
  	  if (strlen (ctrl->txbuf) == 1)
  	    {
  	      stinf ("\nNothing 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 ();
    close (ctrl->fd);
    return (scm->af_unix_echo_tx == scm->af_unix_echo_rx) ? 0 : -1;
  }
  
  /*
   * fd.io coding-style-patch-verification: ON
   *
   * Local Variables:
   * eval: (c-set-style "gnu")
   * End:
   */
  