plugins/check_tcp.c

   1 /*****************************************************************************
   2
   3  This program is free software; you can redistribute it and/or modify
   4  it under the terms of the GNU General Public License as published by
   5  the Free Software Foundation; either version 2 of the License, or
   6  (at your option) any later version.
   7
   8  This program is distributed in the hope that it will be useful,
   9  but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  GNU General Public License for more details.
  12
  13  You should have received a copy of the GNU General Public License
  14  along with this program; if not, write to the Free Software
  15  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  16
  17  $Id$
  18
  19 *****************************************************************************/
  20
  21 /* progname "check_tcp" changes depending on symlink called */
  22 char *progname;
  23 const char *revision = "$Revision$";
  24 const char *copyright = "1999-2004";
  25 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  26
  27 #include "common.h"
  28 #include "netutils.h"
  29 #include "utils.h"
  30
  31 #ifdef HAVE_SSL
  32 static int check_cert = FALSE;
  33 static int days_till_exp;
  34 # define my_recv(buf, len) ((flags & FLAG_SSL) ? np_net_ssl_read(buf, len) : read(sd, buf, len))
  35 # define my_send(buf, len) ((flags & FLAG_SSL) ? np_net_ssl_write(buf, len) : send(sd, buf, len, 0))
  36 #else
  37 # define my_recv(buf, len) read(sd, buf, len)
  38 # define my_send(buf, len) send(sd, buf, len, 0)
  39 #endif
  40
  41 /* int my_recv(char *, size_t); */
  42 static int process_arguments (int, char **);
  43 void print_help (void);
  44 void print_usage (void);
  45
  46 #define EXPECT server_expect[0]
  47 static char *SERVICE = "TCP";
  48 static char *SEND = NULL;
  49 static char *QUIT = NULL;
  50 static int PROTOCOL = IPPROTO_TCP; /* most common is default */
  51 static int PORT = 0;
  52
  53 static int server_port = 0;
  54 static char *server_address = NULL;
  55 static char *server_send = NULL;
  56 static char *server_quit = NULL;
  57 static char **server_expect;
  58 static size_t server_expect_count = 0;
  59 static size_t maxbytes = 0;
  60 static char **warn_codes = NULL;
  61 static size_t warn_codes_count = 0;
  62 static char **crit_codes = NULL;
  63 static size_t crit_codes_count = 0;
  64 static unsigned int delay = 0;
  65 static double warning_time = 0;
  66 static double critical_time = 0;
  67 static double elapsed_time = 0;
  68 static long microsec;
  69 static int sd = 0;
  70 #define MAXBUF 1024
  71 static char buffer[MAXBUF];
  72 static int expect_mismatch_state = STATE_WARNING;
  73
  74 #define FLAG_SSL 0x01
  75 #define FLAG_VERBOSE 0x02
  76 #define FLAG_EXACT_MATCH 0x04
  77 #define FLAG_TIME_WARN 0x08
  78 #define FLAG_TIME_CRIT 0x10
  79 #define FLAG_HIDE_OUTPUT 0x20
  80 static size_t flags = FLAG_EXACT_MATCH;
  81
  82 int
  83 main (int argc, char **argv)
  84 {
  85         int result = STATE_UNKNOWN;
  86         int i;
  87         char *status = NULL;
  88         struct timeval tv;
  89         size_t len, match = -1;
  90
  91         setlocale (LC_ALL, "");
  92         bindtextdomain (PACKAGE, LOCALEDIR);
  93         textdomain (PACKAGE);
  94
  95         /* determine program- and service-name quickly */
  96         progname = strrchr(argv[0], '/');
  97         if(progname != NULL) progname++;
  98         else progname = argv[0];
  99
 100         len = strlen(progname);
 101         if(len > 6 && !memcmp(progname, "check_", 6)) {
 102                 SERVICE = progname + 6;
 103                 for(i = 0; i < len - 6; i++)
 104                         SERVICE[i] = toupper(SERVICE[i]);
 105         }
 106
 107         /* set up a resonable buffer at first (will be realloc()'ed if
 108          * user specifies other options) */
 109         server_expect = calloc(sizeof(char *), 2);
 110
 111         /* determine defaults for this service's protocol */
 112         if (!strncmp(SERVICE, "UDP", 3)) {
 113                 PROTOCOL = IPPROTO_UDP;
 114         }
 115         else if (!strncmp(SERVICE, "FTP", 3)) {
 116                 EXPECT = "220";
 117                 QUIT = "QUIT\r\n";
 118                 PORT = 21;
 119         }
 120         else if (!strncmp(SERVICE, "POP", 3) || !strncmp(SERVICE, "POP3", 4)) {
 121                 EXPECT = "+OK";
 122                 QUIT = "QUIT\r\n";
 123                 PORT = 110;
 124         }
 125         else if (!strncmp(SERVICE, "SMTP", 4)) {
 126                 EXPECT = "220";
 127                 QUIT = "QUIT\r\n";
 128                 PORT = 25;
 129         }
 130         else if (!strncmp(SERVICE, "IMAP", 4)) {
 131                 EXPECT = "* OK";
 132                 QUIT = "a1 LOGOUT\r\n";
 133                 PORT = 143;
 134         }
 135 #ifdef HAVE_SSL
 136         else if (!strncmp(SERVICE, "SIMAP", 5)) {
 137                 EXPECT = "* OK";
 138                 QUIT = "a1 LOGOUT\r\n";
 139                 flags |= FLAG_SSL;
 140                 PORT = 993;
 141         }
 142         else if (!strncmp(SERVICE, "SPOP", 4)) {
 143                 EXPECT = "+OK";
 144                 QUIT = "QUIT\r\n";
 145                 flags |= FLAG_SSL;
 146                 PORT = 995;
 147         }
 148         else if (!strncmp(SERVICE, "SSMTP", 5)) {
 149                 EXPECT = "220";
 150                 QUIT = "QUIT\r\n";
 151                 flags |= FLAG_SSL;
 152                 PORT = 465;
 153         }
 154         else if (!strncmp(SERVICE, "JABBER", 6)) {
 155                 SEND = "<stream:stream to=\'host\' xmlns=\'jabber:client\' xmlns:stream=\'http://etherx.jabber.org/streams\'>\n";
 156                 EXPECT = "<?xml version=\'1.0\'?><stream:stream xmlns:stream=\'http://etherx.jabber.org/streams\'";
 157                 QUIT = "</stream:stream>\n";
 158                 flags |= FLAG_SSL | FLAG_HIDE_OUTPUT;
 159                 PORT = 5222;
 160         }
 161         else if (!strncmp (SERVICE, "NNTPS", 5)) {
 162                 server_expect_count = 2;
 163                 server_expect[0] = "200";
 164                 server_expect[1] = "201";
 165                 QUIT = "QUIT\r\n";
 166                 flags |= FLAG_SSL;
 167                 PORT = 563;
 168         }
 169 #endif
 170         else if (!strncmp (SERVICE, "NNTP", 4)) {
 171                 server_expect_count = 2;
 172                 server_expect = malloc(sizeof(char *) * server_expect_count);
 173                 server_expect[0] = strdup("200");
 174                 server_expect[1] = strdup("201");
 175                 QUIT = "QUIT\r\n";
 176                 PORT = 119;
 177         }
 178         else if (!strncmp(SERVICE, "CLAMD", 5)) {
 179                 SEND = "PING";
 180                 EXPECT = "PONG";
 181                 QUIT = NULL;
 182                 PORT = 3310;
 183         }
 184         /* fallthrough check, so it's supposed to use reverse matching */
 185         else if (strcmp (SERVICE, "TCP"))
 186                 usage (_("CRITICAL - Generic check_tcp called with unknown service\n"));
 187
 188         server_address = "127.0.0.1";
 189         server_port = PORT;
 190         server_send = SEND;
 191         server_quit = QUIT;
 192         status = NULL;
 193
 194         if (process_arguments (argc, argv) == ERROR)
 195                 usage4 (_("Could not parse arguments"));
 196
 197         if(flags & FLAG_VERBOSE) {
 198                 printf("Using service %s\n", SERVICE);
 199                 printf("Port: %d\n", PORT);
 200                 printf("flags: 0x%x\n", (int)flags);
 201         }
 202
 203         if(EXPECT && !server_expect_count)
 204                 server_expect_count++;
 205
 206         /* set up the timer */
 207         signal (SIGALRM, socket_timeout_alarm_handler);
 208         alarm (socket_timeout);
 209
 210         /* try to connect to the host at the given port number */
 211         gettimeofday (&tv, NULL);
 212
 213         result = np_net_connect (server_address, server_port, &sd, PROTOCOL);
 214         if (result == STATE_CRITICAL) return STATE_CRITICAL;
 215
 216 #ifdef HAVE_SSL
 217         if (flags & FLAG_SSL){
 218                 result = np_net_ssl_init(sd);
 219                 if (result == STATE_OK && check_cert == TRUE) {
 220                         result = np_net_ssl_check_cert(days_till_exp);
 221                         if(result != STATE_OK) {
 222                                 printf(_("CRITICAL - Cannot retrieve server certificate.\n"));
 223                         }
 224                 }
 225         }
 226         if(result != STATE_OK){
 227                 np_net_ssl_cleanup();
 228                 if(sd) close(sd);
 229                 return result;
 230         }
 231 #endif /* HAVE_SSL */
 232
 233         if (server_send != NULL) {              /* Something to send? */
 234                 my_send(server_send, strlen(server_send));
 235         }
 236
 237         if (delay > 0) {
 238                 tv.tv_sec += delay;
 239                 sleep (delay);
 240         }
 241
 242         if(flags & FLAG_VERBOSE) {
 243                 printf("server_expect_count: %d\n", (int)server_expect_count);
 244                 for(i = 0; i < server_expect_count; i++)
 245                         printf("\t%d: %s\n", i, server_expect[i]);
 246         }
 247
 248         /* if(len) later on, we know we have a non-NULL response */
 249         len = 0;
 250         if (server_expect_count) {
 251
 252                 /* watch for the expect string */
 253                 while ((i = my_recv(buffer, sizeof(buffer))) > 0) {
 254                         status = realloc(status, len + i + 1);
 255                         memcpy(&status[len], buffer, i);
 256                         len += i;
 257
 258                         /* stop reading if user-forced or data-starved */
 259                         if(i < sizeof(buffer) || (maxbytes && len >= maxbytes))
 260                                 break;
 261
 262                         if (maxbytes && len >= maxbytes)
 263                                 break;
 264                 }
 265
 266                 /* no data when expected, so return critical */
 267                 if (len == 0)
 268                         die (STATE_CRITICAL, _("No data received from host\n"));
 269
 270                 /* force null-termination and strip whitespace from end of output */
 271                 status[len--] = '\0';
 272                 /* print raw output if we're debugging */
 273                 if(flags & FLAG_VERBOSE)
 274                         printf("received %d bytes from host\n#-raw-recv-------#\n%s\n#-raw-recv-------#\n",
 275                                (int)len + 1, status);
 276                 while(isspace(status[len])) status[len--] = '\0';
 277
 278                 for (i = 0; i < server_expect_count; i++) {
 279                         match = -2;             /* tag it so we know if we tried and failed */
 280                         if (flags & FLAG_VERBOSE)
 281                                 printf ("looking for [%s] %s [%s]\n", server_expect[i],
 282                                         (flags & FLAG_EXACT_MATCH) ? "in beginning of" : "anywhere in",
 283                                         status);
 284
 285                         /* match it. math first in short-circuit */
 286                         if ((flags & FLAG_EXACT_MATCH && !strncmp(status, server_expect[i], strlen(server_expect[i]))) ||
 287                             (!(flags & FLAG_EXACT_MATCH) && strstr(status, server_expect[i])))
 288                         {
 289                                 if(flags & FLAG_VERBOSE) puts("found it");
 290                                 match = i;
 291                                 break;
 292                         }
 293                 }
 294         }
 295
 296         if (server_quit != NULL) {
 297                 my_send(server_quit, strlen(server_quit));
 298         }
 299 #ifdef HAVE_SSL
 300         np_net_ssl_cleanup();
 301 #endif
 302         if (sd) close (sd);
 303
 304         microsec = deltime (tv);
 305         elapsed_time = (double)microsec / 1.0e6;
 306
 307         if (flags & FLAG_TIME_CRIT && elapsed_time > critical_time)
 308                 result = STATE_CRITICAL;
 309         else if (flags & FLAG_TIME_WARN && elapsed_time > warning_time)
 310                 result = STATE_WARNING;
 311
 312         /* did we get the response we hoped? */
 313         if(match == -2 && result != STATE_CRITICAL)
 314                 result = expect_mismatch_state;
 315
 316         /* reset the alarm */
 317         alarm (0);
 318
 319         /* this is a bit stupid, because we don't want to print the
 320          * response time (which can look ok to the user) if we didn't get
 321          * the response we were looking for. if-else */
 322         printf(_("%s %s - "), SERVICE, state_text(result));
 323
 324         if(match == -2 && len && !(flags & FLAG_HIDE_OUTPUT))
 325                 printf("Unexpected response from host/socket: %s", status);
 326         else {
 327                 printf("%.3f second response time on ", elapsed_time);
 328                 if(server_address[0] != '/')
 329                         printf("port %d", server_port);
 330                 else
 331                         printf("socket %s", server_address);
 332         }
 333
 334         if (match != -2 && !(flags & FLAG_HIDE_OUTPUT) && len)
 335                 printf (" [%s]", status);
 336
 337         /* perf-data doesn't apply when server doesn't talk properly,
 338          * so print all zeroes on warn and crit */
 339         if(match == -2)
 340                 printf ("|time=%fs;0.0;0.0;0.0;0.0", elapsed_time);
 341         else
 342                 printf("|%s",
 343                                 fperfdata ("time", elapsed_time, "s",
 344                                    TRUE, warning_time,
 345                                    TRUE, critical_time,
 346                                    TRUE, 0,
 347                                    TRUE, socket_timeout)
 348                       );
 349
 350         putchar('\n');
 351         return result;
 352 }
 353
 354
 355
 356 /* process command-line arguments */
 357 static int
 358 process_arguments (int argc, char **argv)
 359 {
 360         int c;
 361
 362         int option = 0;
 363         static struct option longopts[] = {
 364                 {"hostname", required_argument, 0, 'H'},
 365                 {"critical-time", required_argument, 0, 'c'},
 366                 {"warning-time", required_argument, 0, 'w'},
 367                 {"critical-codes", required_argument, 0, 'C'},
 368                 {"warning-codes", required_argument, 0, 'W'},
 369                 {"timeout", required_argument, 0, 't'},
 370                 {"protocol", required_argument, 0, 'P'},
 371                 {"port", required_argument, 0, 'p'},
 372                 {"send", required_argument, 0, 's'},
 373                 {"expect", required_argument, 0, 'e'},
 374                 {"maxbytes", required_argument, 0, 'm'},
 375                 {"quit", required_argument, 0, 'q'},
 376                 {"jail", required_argument, 0, 'j'},
 377                 {"delay", required_argument, 0, 'd'},
 378                 {"refuse", required_argument, 0, 'r'},
 379                 {"mismatch", required_argument, 0, 'M'},
 380                 {"use-ipv4", no_argument, 0, '4'},
 381                 {"use-ipv6", no_argument, 0, '6'},
 382                 {"verbose", no_argument, 0, 'v'},
 383                 {"version", no_argument, 0, 'V'},
 384                 {"help", no_argument, 0, 'h'},
 385 #ifdef HAVE_SSL
 386                 {"ssl", no_argument, 0, 'S'},
 387                 {"certificate", required_argument, 0, 'D'},
 388 #endif
 389                 {0, 0, 0, 0}
 390         };
 391
 392         if (argc < 2)
 393                 usage4 (_("No arguments found"));
 394
 395         /* backwards compatibility */
 396         for (c = 1; c < argc; c++) {
 397                 if (strcmp ("-to", argv[c]) == 0)
 398                         strcpy (argv[c], "-t");
 399                 else if (strcmp ("-wt", argv[c]) == 0)
 400                         strcpy (argv[c], "-w");
 401                 else if (strcmp ("-ct", argv[c]) == 0)
 402                         strcpy (argv[c], "-c");
 403         }
 404
 405         if (!is_option (argv[1])) {
 406                 server_address = argv[1];
 407                 argv[1] = argv[0];
 408                 argv = &argv[1];
 409                 argc--;
 410         }
 411
 412         while (1) {
 413                 c = getopt_long (argc, argv, "+hVv46H:s:e:q:m:c:w:t:p:C:W:d:Sr:jD:M:",
 414                                  longopts, &option);
 415
 416                 if (c == -1 || c == EOF || c == 1)
 417                         break;
 418
 419                 switch (c) {
 420                 case '?':                 /* print short usage statement if args not parsable */
 421                         usage2 (_("Unknown argument"), optarg);
 422                 case 'h':                 /* help */
 423                         print_help ();
 424                         exit (STATE_OK);
 425                 case 'V':                 /* version */
 426                         print_revision (progname, revision);
 427                         exit (STATE_OK);
 428                 case 'v':                 /* verbose mode */
 429                         flags |= FLAG_VERBOSE;
 430                         break;
 431                 case '4':
 432                         address_family = AF_INET;
 433                         break;
 434                 case '6':
 435 #ifdef USE_IPV6
 436                         address_family = AF_INET6;
 437 #else
 438                         usage4 (_("IPv6 support not available"));
 439 #endif
 440                         break;
 441                 case 'H':                 /* hostname */
 442                         server_address = optarg;
 443                         break;
 444                 case 'c':                 /* critical */
 445                         if (!is_intnonneg (optarg))
 446                                 usage4 (_("Critical threshold must be a positive integer"));
 447                         else
 448                                 critical_time = strtod (optarg, NULL);
 449                         flags |= FLAG_TIME_CRIT;
 450                         break;
 451                 case 'j':                 /* hide output */
 452                         flags |= FLAG_HIDE_OUTPUT;
 453                         break;
 454                 case 'w':                 /* warning */
 455                         if (!is_intnonneg (optarg))
 456                                 usage4 (_("Warning threshold must be a positive integer"));
 457                         else
 458                                 warning_time = strtod (optarg, NULL);
 459                         flags |= FLAG_TIME_WARN;
 460                         break;
 461                 case 'C':
 462                         crit_codes = realloc (crit_codes, ++crit_codes_count);
 463                         crit_codes[crit_codes_count - 1] = optarg;
 464                         break;
 465                 case 'W':
 466                         warn_codes = realloc (warn_codes, ++warn_codes_count);
 467                         warn_codes[warn_codes_count - 1] = optarg;
 468                         break;
 469                 case 't':                 /* timeout */
 470                         if (!is_intpos (optarg))
 471                                 usage4 (_("Timeout interval must be a positive integer"));
 472                         else
 473                                 socket_timeout = atoi (optarg);
 474                         break;
 475                 case 'p':                 /* port */
 476                         if (!is_intpos (optarg))
 477                                 usage4 (_("Port must be a positive integer"));
 478                         else
 479                                 server_port = atoi (optarg);
 480                         break;
 481                 case 's':
 482                         server_send = optarg;
 483                         break;
 484                 case 'e': /* expect string (may be repeated) */
 485                         EXPECT = NULL;
 486                         flags &= ~FLAG_EXACT_MATCH;
 487                         if (server_expect_count == 0)
 488                                 server_expect = malloc (sizeof (char *) * (++server_expect_count));
 489                         else
 490                                 server_expect = realloc (server_expect, sizeof (char *) * (++server_expect_count));
 491                         server_expect[server_expect_count - 1] = optarg;
 492                         break;
 493                 case 'm':
 494                         if (!is_intpos (optarg))
 495                                 usage4 (_("Maxbytes must be a positive integer"));
 496                         else
 497                                 maxbytes = strtol (optarg, NULL, 0);
 498                 case 'q':
 499                         asprintf(&server_quit, "%s\r\n", optarg);
 500                         break;
 501                 case 'r':
 502                         if (!strncmp(optarg,"ok",2))
 503                                 econn_refuse_state = STATE_OK;
 504                         else if (!strncmp(optarg,"warn",4))
 505                                 econn_refuse_state = STATE_WARNING;
 506                         else if (!strncmp(optarg,"crit",4))
 507                                 econn_refuse_state = STATE_CRITICAL;
 508                         else
 509                                 usage4 (_("Refuse must be one of ok, warn, crit"));
 510                         break;
 511                 case 'M':
 512                         if (!strncmp(optarg,"ok",2))
 513                                 expect_mismatch_state = STATE_OK;
 514                         else if (!strncmp(optarg,"warn",4))
 515                                 expect_mismatch_state = STATE_WARNING;
 516                         else if (!strncmp(optarg,"crit",4))
 517                                 expect_mismatch_state = STATE_CRITICAL;
 518                         else
 519                                 usage4 (_("Mismatch must be one of ok, warn, crit"));
 520                         break;
 521                 case 'd':
 522                         if (is_intpos (optarg))
 523                                 delay = atoi (optarg);
 524                         else
 525                                 usage4 (_("Delay must be a positive integer"));
 526                         break;
 527                 case 'D': /* Check SSL cert validity - days 'til certificate expiration */
 528 #ifdef HAVE_SSL
 529 #  ifdef USE_OPENSSL /* XXX */
 530                         if (!is_intnonneg (optarg))
 531                                 usage2 (_("Invalid certificate expiration period"), optarg);
 532                         days_till_exp = atoi (optarg);
 533                         check_cert = TRUE;
 534                         flags |= FLAG_SSL;
 535                         break;
 536 #  endif /* USE_OPENSSL */
 537 #endif
 538                         /* fallthrough if we don't have ssl */
 539                 case 'S':
 540 #ifdef HAVE_SSL
 541                         flags |= FLAG_SSL;
 542 #else
 543                         die (STATE_UNKNOWN, _("Invalid option - SSL is not available"));
 544 #endif
 545                         break;
 546                 }
 547         }
 548
 549         if (server_address == NULL)
 550                 usage4 (_("You must provide a server address"));
 551         else if (server_address[0] != '/' && is_host (server_address) == FALSE)
 552                 die (STATE_CRITICAL, "%s: %s - %s\n", progname, _("Invalid hostname, address or socket"), server_address);
 553
 554         return TRUE;
 555 }
 556
 557
 558 void
 559 print_help (void)
 560 {
 561         print_revision (progname, revision);
 562
 563         printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
 564         printf (COPYRIGHT, copyright, email);
 565
 566         printf (_("This plugin tests %s connections with the specified host (or unix socket).\n\n"),
 567                 SERVICE);
 568
 569         print_usage ();
 570
 571         printf (_(UT_HELP_VRSN));
 572
 573         printf (_(UT_HOST_PORT), 'p', "none");
 574
 575         printf (_(UT_IPv46));
 576
 577         printf (_("\
 578  -s, --send=STRING\n\
 579     String to send to the server\n\
 580  -e, --expect=STRING\n\
 581     String to expect in server response\n\
 582  -q, --quit=STRING\n\
 583     String to send server to initiate a clean close of the connection\n"));
 584
 585         printf (_("\
 586  -r, --refuse=ok|warn|crit\n\
 587     Accept tcp refusals with states ok, warn, crit (default: crit)\n\
 588  -M, --mismatch=ok|warn|crit\n\
 589     Accept expected string mismatches with states ok, warn, crit (default: warn)\n\
 590  -j, --jail\n\
 591     Hide output from TCP socket\n\
 592  -m, --maxbytes=INTEGER\n\
 593     Close connection once more than this number of bytes are received\n\
 594  -d, --delay=INTEGER\n\
 595     Seconds to wait between sending string and polling for response\n"));
 596
 597 #ifdef HAVE_SSL
 598         printf (_("\
 599  -D, --certificate=INTEGER\n\
 600     Minimum number of days a certificate has to be valid.\n\
 601  -S, --ssl\n\
 602     Use SSL for the connection.\n"));
 603 #endif
 604
 605         printf (_(UT_WARN_CRIT));
 606
 607         printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
 608
 609         printf (_(UT_VERBOSE));
 610
 611         printf (_(UT_SUPPORT));
 612 }
 613
 614
 615 void
 616 print_usage (void)
 617 {
 618         printf ("\
 619 Usage: %s -H host -p port [-w <warning time>] [-c <critical time>]\n\
 620                   [-s <send string>] [-e <expect string>] [-q <quit string>]\n\
 621                   [-m <maximum bytes>] [-d <delay>] [-t <timeout seconds>]\n\
 622                   [-r <refuse state>] [-M <mismatch state>] [-v] [-4|-6] [-j]\n\
 623                   [-D <days to cert expiry>] [-S <use SSL>]\n", progname);
 624 }
 625