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check_tcp.c

/*****************************************************************************

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 $Id: check_tcp.c,v 1.61 2004/12/30 00:41:40 opensides Exp $
 
*****************************************************************************/

/* progname "check_tcp" changes depending on symlink called */
char *progname;
const char *revision = "$Revision: 1.61 $";
const char *copyright = "1999-2004";
const char *email = "nagiosplug-devel@lists.sourceforge.net";

#include "common.h"
#include "netutils.h"
#include "utils.h"

#ifdef HAVE_SSL_H
#  include <rsa.h>
#  include <crypto.h>
#  include <x509.h>
#  include <pem.h>
#  include <ssl.h>
#  include <err.h>
#else
#  ifdef HAVE_OPENSSL_SSL_H
#    include <openssl/rsa.h>
#    include <openssl/crypto.h>
#    include <openssl/x509.h>
#    include <openssl/pem.h>
#    include <openssl/ssl.h>
#    include <openssl/err.h>
#  endif
#endif

#ifdef HAVE_SSL
int check_cert = FALSE;
int days_till_exp;
char *randbuff = "";
SSL_CTX *ctx;
SSL *ssl;
X509 *server_cert;
int connect_SSL (void);
int check_certificate (X509 **);
#endif

enum {
      TCP_PROTOCOL = 1,
      UDP_PROTOCOL = 2,
      MAXBUF = 1024
};

int process_arguments (int, char **);
int my_recv (void);
void print_help (void);
void print_usage (void);

char *SERVICE = NULL;
char *SEND = NULL;
char *EXPECT = NULL;
char *QUIT = NULL;
int PROTOCOL = 0;
int PORT = 0;

char timestamp[17] = "";
int server_port = 0;
char *server_address = NULL;
char *server_send = NULL;
char *server_quit = NULL;
char **server_expect = NULL;
size_t server_expect_count = 0;
int maxbytes = 0;
char **warn_codes = NULL;
size_t warn_codes_count = 0;
char **crit_codes = NULL;
size_t crit_codes_count = 0;
unsigned int delay = 0;
double warning_time = 0;
int check_warning_time = FALSE;
double critical_time = 0;
int check_critical_time = FALSE;
int hide_output = FALSE;
double elapsed_time = 0;
long microsec;
int verbose = FALSE;
int use_ssl = FALSE;
int sd = 0;
char *buffer;
int expect_mismatch_state = STATE_WARNING;
int exact_matching = TRUE;

int
main (int argc, char **argv)
{
      int result = STATE_UNKNOWN;
      int i;
      char *status;
      struct timeval tv;

      setlocale (LC_ALL, "");
      bindtextdomain (PACKAGE, LOCALEDIR);
      textdomain (PACKAGE);

      if (strstr (argv[0], "check_udp")) {
            progname = strdup ("check_udp");
            SERVICE = strdup ("UDP");
            SEND = NULL;
            EXPECT = NULL;
            QUIT = NULL;
            PROTOCOL = UDP_PROTOCOL;
            PORT = 0;
      }
      else if (strstr (argv[0], "check_tcp")) {
            progname = strdup ("check_tcp");
            SERVICE = strdup ("TCP");
            SEND = NULL;
            EXPECT = NULL;
            QUIT = NULL;
            PROTOCOL = TCP_PROTOCOL;
            PORT = 0;
      }
      else if (strstr (argv[0], "check_ftp")) {
            progname = strdup ("check_ftp");
            SERVICE = strdup ("FTP");
            SEND = NULL;
            EXPECT = strdup ("220");
            QUIT = strdup ("QUIT\r\n");
            PROTOCOL = TCP_PROTOCOL;
            PORT = 21;
      }
      else if (strstr (argv[0], "check_smtp")) {
            progname = strdup ("check_smtp");
            SERVICE = strdup ("SMTP");
            SEND = NULL;
            EXPECT = strdup ("220");
            QUIT = strdup ("QUIT\r\n");
            PROTOCOL = TCP_PROTOCOL;
            PORT = 25;
      }
      else if (strstr (argv[0], "check_pop")) {
            progname = strdup ("check_pop");
            SERVICE = strdup ("POP");
            SEND = NULL;
            EXPECT = strdup ("+OK");
            QUIT = strdup ("QUIT\r\n");
            PROTOCOL = TCP_PROTOCOL;
            PORT = 110;
      }
      else if (strstr (argv[0], "check_imap")) {
            progname = strdup ("check_imap");
            SERVICE = strdup ("IMAP");
            SEND = NULL;
            EXPECT = strdup ("* OK");
            QUIT = strdup ("a1 LOGOUT\r\n");
            PROTOCOL = TCP_PROTOCOL;
            PORT = 143;
      }
#ifdef HAVE_SSL
      else if (strstr(argv[0],"check_simap")) {
            progname = strdup ("check_simap");
            SERVICE = strdup ("SIMAP");
            SEND=NULL;
            EXPECT = strdup ("* OK");
            QUIT = strdup ("a1 LOGOUT\r\n");
            PROTOCOL=TCP_PROTOCOL;
            use_ssl=TRUE;
            PORT=993;
      }
      else if (strstr(argv[0],"check_spop")) {
            progname = strdup ("check_spop");
            SERVICE = strdup ("SPOP");
            SEND=NULL;
            EXPECT = strdup ("+OK");
            QUIT = strdup ("QUIT\r\n");
            PROTOCOL=TCP_PROTOCOL;
            use_ssl=TRUE;
            PORT=995;
      }
      else if (strstr(argv[0],"check_jabber")) {
            progname = strdup("check_jabber");
            SERVICE = strdup("JABBER");
            SEND = strdup("<stream:stream to=\'host\' xmlns=\'jabber:client\' xmlns:stream=\'http://etherx.jabber.org/streams\'>\n");
            EXPECT = strdup("<?xml version=\'1.0\'?><stream:stream xmlns:stream=\'http://etherx.jabber.org/streams\'");
            QUIT = strdup("</stream:stream>\n");
            PROTOCOL=TCP_PROTOCOL;
            use_ssl=TRUE;
            PORT = 5222;
      }
       else if (strstr (argv[0], "check_nntps")) {
            progname = strdup("check_nntps");
            SERVICE = strdup("NNTPS");
            SEND = NULL;
            EXPECT = NULL;
            server_expect = realloc (server_expect, ++server_expect_count);
            asprintf (&server_expect[server_expect_count - 1], "200");
            server_expect = realloc (server_expect, ++server_expect_count);
            asprintf (&server_expect[server_expect_count - 1], "201");
            QUIT = strdup("QUIT\r\n");
            PROTOCOL = TCP_PROTOCOL;
            use_ssl=TRUE;
            PORT = 563;
}

#endif
      else if (strstr (argv[0], "check_nntp")) {
            progname = strdup ("check_nntp");
            SERVICE = strdup ("NNTP");
            SEND = NULL;
            EXPECT = NULL;
            server_expect = realloc (server_expect, sizeof (char *) * (++server_expect_count));
            asprintf (&server_expect[server_expect_count - 1], "200");
            server_expect = realloc (server_expect, sizeof (char *) * (++server_expect_count));
            asprintf (&server_expect[server_expect_count - 1], "201");
            asprintf (&QUIT, "QUIT\r\n");
            PROTOCOL = TCP_PROTOCOL;
            PORT = 119;
      }
      else {
            progname = strdup ("check_tcp");
            usage (_("CRITICAL - Generic check_tcp called with unknown service\n"));
      }

      server_address = strdup ("127.0.0.1");
      server_port = PORT;
      server_send = SEND;
      server_quit = QUIT;
      status = strdup ("");

      if (process_arguments (argc, argv) == ERROR)
            usage4 (_("Could not parse arguments"));

      /* use default expect if none listed in process_arguments() */
      if (EXPECT && server_expect_count == 0) {
            server_expect = malloc (sizeof (char *) * (++server_expect_count));
            server_expect[server_expect_count - 1] = EXPECT;
      }

      /* initialize alarm signal handling */
      signal (SIGALRM, socket_timeout_alarm_handler);

      /* set socket timeout */
      alarm (socket_timeout);

      /* try to connect to the host at the given port number */
      gettimeofday (&tv, NULL);
#ifdef HAVE_SSL
      if (use_ssl && check_cert == TRUE) {
        if (connect_SSL () != OK)
          die (STATE_CRITICAL,_("CRITICAL - Could not make SSL connection\n"));
        if ((server_cert = SSL_get_peer_certificate (ssl)) != NULL) {
          result = check_certificate (&server_cert);
          X509_free(server_cert);
        }
        else {
          printf(_("CRITICAL - Cannot retrieve server certificate.\n"));
          result = STATE_CRITICAL;
        }
        SSL_shutdown (ssl);
        SSL_free (ssl);
        SSL_CTX_free (ctx);
        close (sd);
        return result;
      }
      else if (use_ssl)
            result = connect_SSL ();
      else
#endif
            {
                  if (PROTOCOL == UDP_PROTOCOL)
                        result = my_udp_connect (server_address, server_port, &sd);
                  else
                        /* default is TCP */
                        result = my_tcp_connect (server_address, server_port, &sd);
            }

      if (result == STATE_CRITICAL)
            return STATE_CRITICAL;

      if (server_send != NULL) {          /* Something to send? */
            asprintf (&server_send, "%s\r\n", server_send);
#ifdef HAVE_SSL
            if (use_ssl)
                  SSL_write(ssl, server_send, (int)strlen(server_send));
            else
#endif
                  send (sd, server_send, strlen(server_send), 0);
      }

      if (delay > 0) {
            tv.tv_sec += delay;
            sleep (delay);
      }

      if (server_send || server_expect_count > 0) {

            buffer = malloc (MAXBUF);
            memset (buffer, '\0', MAXBUF);
            /* watch for the expect string */
            while ((i = my_recv ()) > 0) {
                  buffer[i] = '\0';
                  asprintf (&status, "%s%s", status, buffer);
                  if (buffer[i-2] == '\r' && buffer[i-1] == '\n')
                        break;
                  if (maxbytes>0 && strlen(status) >= (unsigned)maxbytes)
                        break;
            }

            /* return a CRITICAL status if we couldn't read any data */
            if (strlen(status) == 0)
                  die (STATE_CRITICAL, _("No data received from host\n"));

            strip (status);

            if (status && verbose)
                  printf ("%s\n", status);

            if (server_expect_count > 0) {
                  for (i = 0;; i++) {
                        if (verbose)
                              printf ("%d %d\n", i, (int)server_expect_count);
                        if (i >= (int)server_expect_count)
                              die (expect_mismatch_state, _("Unexpected response from host: %s\n"), status);
                        /* default expect gets exact matching */
                        if (exact_matching) {
                              if (strncmp(status, server_expect[i], strlen(server_expect[i])) == 0)
                                    break;
                        } else {
                              if (strstr (status, server_expect[i]))
                                    break;
                        }
                  }
            }
      }

      if (server_quit != NULL) {
#ifdef HAVE_SSL
            if (use_ssl) {
                  SSL_write (ssl, server_quit, (int)strlen(server_quit));
                  SSL_shutdown (ssl);
                  SSL_free (ssl);
                  SSL_CTX_free (ctx);
            }
            else {
#endif
                  send (sd, server_quit, strlen (server_quit), 0);
#ifdef HAVE_SSL
            }
#endif
      }

      /* close the connection */
      if (sd)
            close (sd);

      microsec = deltime (tv);
      elapsed_time = (double)microsec / 1.0e6;

      if (check_critical_time == TRUE && elapsed_time > critical_time)
            result = STATE_CRITICAL;
      else if (check_warning_time == TRUE && elapsed_time > warning_time)
            result = STATE_WARNING;

      /* reset the alarm */
      alarm (0);

      printf
            (_("%s %s%s - %.3f second response time on port %d"),
             SERVICE,
             state_text (result),
             (was_refused) ? " (refused)" : "",
             elapsed_time, server_port);

      if (hide_output == FALSE && status && strlen(status) > 0)
            printf (" [%s]", status);

      printf (" |%s\n", fperfdata ("time", elapsed_time, "s",
            TRUE, warning_time,
            TRUE, critical_time,
            TRUE, 0,
            TRUE, socket_timeout));

      return result;
}



/* process command-line arguments */
int
process_arguments (int argc, char **argv)
{
      int c;

      int option = 0;
      static struct option longopts[] = {
            {"hostname", required_argument, 0, 'H'},
            {"critical-time", required_argument, 0, 'c'},
            {"warning-time", required_argument, 0, 'w'},
            {"critical-codes", required_argument, 0, 'C'},
            {"warning-codes", required_argument, 0, 'W'},
            {"timeout", required_argument, 0, 't'},
            {"protocol", required_argument, 0, 'P'},
            {"port", required_argument, 0, 'p'},
            {"send", required_argument, 0, 's'},
            {"expect", required_argument, 0, 'e'},
            {"maxbytes", required_argument, 0, 'm'},
            {"quit", required_argument, 0, 'q'},
            {"jail", required_argument, 0, 'j'},
            {"delay", required_argument, 0, 'd'},
            {"refuse", required_argument, 0, 'r'},
            {"mismatch", required_argument, 0, 'M'},
            {"use-ipv4", no_argument, 0, '4'},
            {"use-ipv6", no_argument, 0, '6'},
            {"verbose", no_argument, 0, 'v'},
            {"version", no_argument, 0, 'V'},
            {"help", no_argument, 0, 'h'},
#ifdef HAVE_SSL
            {"ssl", no_argument, 0, 'S'},
            {"certificate", required_argument, 0, 'D'},
#endif
            {0, 0, 0, 0}
      };

      if (argc < 2)
            usage4 (_("No arguments found"));

      /* backwards compatibility */
      for (c = 1; c < argc; c++) {
            if (strcmp ("-to", argv[c]) == 0)
                  strcpy (argv[c], "-t");
            else if (strcmp ("-wt", argv[c]) == 0)
                  strcpy (argv[c], "-w");
            else if (strcmp ("-ct", argv[c]) == 0)
                  strcpy (argv[c], "-c");
      }

      if (!is_option (argv[1])) {
            server_address = argv[1];
            argv[1] = argv[0];
            argv = &argv[1];
            argc--;
      }

      while (1) {
            c = getopt_long (argc, argv, "+hVv46H:s:e:q:m:c:w:t:p:C:W:d:Sr:jD:M:",
                             longopts, &option);

            if (c == -1 || c == EOF || c == 1)
                  break;

            switch (c) {
            case '?':                 /* print short usage statement if args not parsable */
                  usage2 (_("Unknown argument"), optarg);
            case 'h':                 /* help */
                  print_help ();
                  exit (STATE_OK);
            case 'V':                 /* version */
                  print_revision (progname, revision);
                  exit (STATE_OK);
            case 'v':                 /* verbose mode */
                  verbose = TRUE;
                  break;
            case '4':
                  address_family = AF_INET;
                  break;
            case '6':
#ifdef USE_IPV6
                  address_family = AF_INET6;
#else
                  usage4 (_("IPv6 support not available"));
#endif
                  break;
            case 'H':                 /* hostname */
                  if (is_host (optarg) == FALSE)
                        usage2 (_("Invalid hostname/address"), optarg);
                  server_address = optarg;
                  break;
            case 'c':                 /* critical */
                  if (!is_intnonneg (optarg))
                        usage4 (_("Critical threshold must be a positive integer"));
                  else
                        critical_time = strtod (optarg, NULL);
                  check_critical_time = TRUE;
                  break;
            case 'j':           /* hide output */
                  hide_output = TRUE;
                  break;
            case 'w':                 /* warning */
                  if (!is_intnonneg (optarg))
                        usage4 (_("Warning threshold must be a positive integer"));
                  else
                        warning_time = strtod (optarg, NULL);
                  check_warning_time = TRUE;
                  break;
            case 'C':
                  crit_codes = realloc (crit_codes, ++crit_codes_count);
                  crit_codes[crit_codes_count - 1] = optarg;
                  break;
            case 'W':
                  warn_codes = realloc (warn_codes, ++warn_codes_count);
                  warn_codes[warn_codes_count - 1] = optarg;
                  break;
            case 't':                 /* timeout */
                  if (!is_intpos (optarg))
                        usage4 (_("Timeout interval must be a positive integer"));
                  else
                        socket_timeout = atoi (optarg);
                  break;
            case 'p':                 /* port */
                  if (!is_intpos (optarg))
                        usage4 (_("Port must be a positive integer"));
                  else
                        server_port = atoi (optarg);
                  break;
            case 's':
                  server_send = optarg;
                  break;
            case 'e': /* expect string (may be repeated) */
                  EXPECT = NULL;
                  exact_matching = FALSE;
                  if (server_expect_count == 0)
                        server_expect = malloc (sizeof (char *) * (++server_expect_count));
                  else
                        server_expect = realloc (server_expect, sizeof (char *) * (++server_expect_count));
                  server_expect[server_expect_count - 1] = optarg;
                  break;
            case 'm':
                  if (!is_intpos (optarg))
                        usage4 (_("Maxbytes must be a positive integer"));
                  else
                        maxbytes = atoi (optarg);
            case 'q':
                  asprintf(&server_quit, "%s\r\n", optarg);
                  break;
            case 'r':
                  if (!strncmp(optarg,"ok",2))
                        econn_refuse_state = STATE_OK;
                  else if (!strncmp(optarg,"warn",4))
                        econn_refuse_state = STATE_WARNING;
                  else if (!strncmp(optarg,"crit",4))
                        econn_refuse_state = STATE_CRITICAL;
                  else
                        usage4 (_("Refuse must be one of ok, warn, crit"));
                  break;
            case 'M':
                  if (!strncmp(optarg,"ok",2))
                        expect_mismatch_state = STATE_OK;
                  else if (!strncmp(optarg,"warn",4))
                        expect_mismatch_state = STATE_WARNING;
                  else if (!strncmp(optarg,"crit",4))
                        expect_mismatch_state = STATE_CRITICAL;
                  else
                        usage4 (_("Mismatch must be one of ok, warn, crit"));
                  break;
            case 'd':
                  if (is_intpos (optarg))
                        delay = atoi (optarg);
                  else
                        usage4 (_("Delay must be a positive integer"));
                  break;
                 case 'D': /* Check SSL cert validity - days 'til certificate expiration */
#ifdef HAVE_SSL
                  if (!is_intnonneg (optarg))
                        usage2 (_("Invalid certificate expiration period"), optarg);
                  days_till_exp = atoi (optarg);
                  check_cert = TRUE;
                  use_ssl = TRUE;
                  break;
            case 'S':
                  use_ssl = TRUE;
#else
                  die (STATE_UNKNOWN, _("Invalid option - SSL is not available"));
#endif
                  break;
            }
      }

      if (server_address == NULL)
            usage4 (_("You must provide a server address"));

      return TRUE;
}



#ifdef HAVE_SSL
int
connect_SSL (void)
{
  SSL_METHOD *meth;

  /* Initialize SSL context */
  SSLeay_add_ssl_algorithms ();
  meth = SSLv23_client_method ();
  SSL_load_error_strings ();
  OpenSSL_add_all_algorithms();
  if ((ctx = SSL_CTX_new (meth)) == NULL)
    {
      printf (_("CRITICAL - Cannot create SSL context.\n"));
      return STATE_CRITICAL;
    }

  /* Initialize alarm signal handling */
  signal (SIGALRM, socket_timeout_alarm_handler);

  /* Set socket timeout */
  alarm (socket_timeout);

  /* Save start time */
  time (&start_time);

  /* Make TCP connection */
  if (my_tcp_connect (server_address, server_port, &sd) == STATE_OK && was_refused == FALSE)
    {
    /* Do the SSL handshake */
      if ((ssl = SSL_new (ctx)) != NULL)
      {
        SSL_set_fd (ssl, sd);
        if (SSL_connect(ssl) == 1)
          return OK;
        /* ERR_print_errors_fp (stderr); */
      printf (_("CRITICAL - Cannot make  SSL connection "));
        ERR_print_errors_fp (stdout);
      /* printf("\n"); */
      }
      else
      {
        printf (_("CRITICAL - Cannot initiate SSL handshake.\n"));
      }
      SSL_free (ssl);
    }

  SSL_CTX_free (ctx);
  close (sd);

  return STATE_CRITICAL;
}
#endif



#ifdef HAVE_SSL
int
check_certificate (X509 ** certificate)
{
  ASN1_STRING *tm;
  int offset;
  struct tm stamp;
  int days_left;


  /* Retrieve timestamp of certificate */
  tm = X509_get_notAfter (*certificate);

  /* Generate tm structure to process timestamp */
  if (tm->type == V_ASN1_UTCTIME) {
    if (tm->length < 10) {
      printf (_("CRITICAL - Wrong time format in certificate.\n"));
      return STATE_CRITICAL;
    }
    else {
      stamp.tm_year = (tm->data[0] - '0') * 10 + (tm->data[1] - '0');
      if (stamp.tm_year < 50)
      stamp.tm_year += 100;
      offset = 0;
    }
  }
  else {
    if (tm->length < 12) {
      printf (_("CRITICAL - Wrong time format in certificate.\n"));
      return STATE_CRITICAL;
    }
    else {
                        stamp.tm_year =
                    (tm->data[0] - '0') * 1000 + (tm->data[1] - '0') * 100 +
                    (tm->data[2] - '0') * 10 + (tm->data[3] - '0');
                        stamp.tm_year -= 1900;
                        offset = 2;
    }
  }
        stamp.tm_mon =
        (tm->data[2 + offset] - '0') * 10 + (tm->data[3 + offset] - '0') - 1;
        stamp.tm_mday =
        (tm->data[4 + offset] - '0') * 10 + (tm->data[5 + offset] - '0');
        stamp.tm_hour =
        (tm->data[6 + offset] - '0') * 10 + (tm->data[7 + offset] - '0');
        stamp.tm_min =
        (tm->data[8 + offset] - '0') * 10 + (tm->data[9 + offset] - '0');
        stamp.tm_sec = 0;
        stamp.tm_isdst = -1;

        days_left = (mktime (&stamp) - time (NULL)) / 86400;
        snprintf
        (timestamp, 16, "%02d/%02d/%04d %02d:%02d",
         stamp.tm_mon + 1,
         stamp.tm_mday, stamp.tm_year + 1900, stamp.tm_hour, stamp.tm_min);

        if (days_left > 0 && days_left <= days_till_exp) {
        printf (_("Certificate expires in %d day(s) (%s).\n"), days_left, timestamp);
        return STATE_WARNING;
        }
        if (days_left < 0) {
        printf (_("Certificate expired on %s.\n"), timestamp);
        return STATE_CRITICAL;
        }

        if (days_left == 0) {
        printf (_("Certificate expires today (%s).\n"), timestamp);
        return STATE_WARNING;
        }

        printf (_("Certificate will expire on %s.\n"), timestamp);

        return STATE_OK;
}
#endif



int
my_recv (void)
{
      int i;

#ifdef HAVE_SSL
      if (use_ssl) {
            i = SSL_read (ssl, buffer, MAXBUF - 1);
      }
      else {
#endif
            i = read (sd, buffer, MAXBUF - 1);
#ifdef HAVE_SSL
      }
#endif

      return i;
}



void
print_help (void)
{
      print_revision (progname, revision);

      printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
      printf (COPYRIGHT, copyright, email);

      printf (_("This plugin tests %s connections with the specified host.\n\n"),
              SERVICE);

      print_usage ();

      printf (_(UT_HELP_VRSN));

      printf (_(UT_HOST_PORT), 'p', "none");

      printf (_(UT_IPv46));

      printf (_("\
 -s, --send=STRING\n\
    String to send to the server\n\
 -e, --expect=STRING\n\
    String to expect in server response\n\
 -q, --quit=STRING\n\
    String to send server to initiate a clean close of the connection\n"));

      printf (_("\
 -r, --refuse=ok|warn|crit\n\
    Accept tcp refusals with states ok, warn, crit (default: crit)\n\
 -M, --mismatch=ok|warn|crit\n\
    Accept expected string mismatches with states ok, warn, crit (default: warn)\n\
 -j, --jail\n\
    Hide output from TCP socket\n\
 -m, --maxbytes=INTEGER\n\
    Close connection once more than this number of bytes are received\n\
 -d, --delay=INTEGER\n\
    Seconds to wait between sending string and polling for response\n"));

#ifdef HAVE_SSL
      printf (_("\
 -D, --certificate=INTEGER\n\
    Minimum number of days a certificate has to be valid.\n\
 -S, --ssl\n\
    Use SSL for the connection.\n"));
#endif

      printf (_(UT_WARN_CRIT));

      printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);

      printf (_(UT_VERBOSE));

      printf (_(UT_SUPPORT));
}



void
print_usage (void)
{
      printf ("\
Usage: %s -H host -p port [-w <warning time>] [-c <critical time>]\n\
                  [-s <send string>] [-e <expect string>] [-q <quit string>]\n\
                  [-m <maximum bytes>] [-d <delay>] [-t <timeout seconds>]\n\
                  [-r <refuse state>] [-M <mismatch state>] [-v] [-4|-6] [-j]\n\
                  [-D <days to cert expiry>] [-S <use SSL>]\n", progname);            
}

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