plugins/check_ping.c

   1 /*****************************************************************************
   2 *
   3 * Nagios check_ping plugin
   4 *
   5 * License: GPL
   6 * Copyright (c) 2000-2007 Nagios Plugins Development Team
   7 *
   8 * Last Modified: $Date$
   9 *
  10 * Description:
  11 *
  12 * This file contains the check_ping plugin
  13 *
  14 * Use the ping program to check connection statistics for a remote host.
  15 *
  16 *
  17 * This program is free software: you can redistribute it and/or modify
  18 * it under the terms of the GNU General Public License as published by
  19 * the Free Software Foundation, either version 3 of the License, or
  20 * (at your option) any later version.
  21 *
  22 * This program is distributed in the hope that it will be useful,
  23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25 * GNU General Public License for more details.
  26 *
  27 * You should have received a copy of the GNU General Public License
  28 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  29 *
  30 * $Id$
  31 *
  32 *****************************************************************************/
  33
  34 const char *progname = "check_ping";
  35 const char *revision = "$Revision$";
  36 const char *copyright = "2000-2007";
  37 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  38
  39 #include "common.h"
  40 #include "netutils.h"
  41 #include "popen.h"
  42 #include "utils.h"
  43
  44 #define WARN_DUPLICATES "DUPLICATES FOUND! "
  45 #define UNKNOWN_TRIP_TIME -1.0  /* -1 seconds */
  46
  47 enum {
  48         UNKNOWN_PACKET_LOSS = 200,    /* 200% */
  49         DEFAULT_MAX_PACKETS = 5       /* default no. of ICMP ECHO packets */
  50 };
  51
  52 int process_arguments (int, char **);
  53 int get_threshold (char *, float *, int *);
  54 int validate_arguments (void);
  55 int run_ping (const char *cmd, const char *addr);
  56 int error_scan (char buf[MAX_INPUT_BUFFER], const char *addr);
  57 void print_usage (void);
  58 void print_help (void);
  59
  60 int display_html = FALSE;
  61 int wpl = UNKNOWN_PACKET_LOSS;
  62 int cpl = UNKNOWN_PACKET_LOSS;
  63 float wrta = UNKNOWN_TRIP_TIME;
  64 float crta = UNKNOWN_TRIP_TIME;
  65 char **addresses = NULL;
  66 int n_addresses = 0;
  67 int max_addr = 1;
  68 int max_packets = -1;
  69 int verbose = 0;
  70
  71 float rta = UNKNOWN_TRIP_TIME;
  72 int pl = UNKNOWN_PACKET_LOSS;
  73
  74 char *warn_text;
  75
  76
  77
  78 int
  79 main (int argc, char **argv)
  80 {
  81         char *cmd = NULL;
  82         char *rawcmd = NULL;
  83         int result = STATE_UNKNOWN;
  84         int this_result = STATE_UNKNOWN;
  85         int i;
  86
  87         setlocale (LC_ALL, "");
  88         setlocale (LC_NUMERIC, "C");
  89         bindtextdomain (PACKAGE, LOCALEDIR);
  90         textdomain (PACKAGE);
  91
  92         addresses = malloc (sizeof(char*) * max_addr);
  93         addresses[0] = NULL;
  94
  95         /* Parse extra opts if any */
  96         argv=np_extra_opts (&argc, argv, progname);
  97
  98         if (process_arguments (argc, argv) == ERROR)
  99                 usage4 (_("Could not parse arguments"));
 100
 101         /* Set signal handling and alarm */
 102         if (signal (SIGALRM, popen_timeout_alarm_handler) == SIG_ERR) {
 103                 usage4 (_("Cannot catch SIGALRM"));
 104         }
 105
 106         /* If ./configure finds ping has timeout values, set plugin alarm slightly
 107          * higher so that we can use response from command line ping */
 108 #if defined(PING_PACKETS_FIRST) && defined(PING_HAS_TIMEOUT)
 109         alarm (timeout_interval + 1);
 110 #else
 111         alarm (timeout_interval);
 112 #endif
 113
 114         for (i = 0 ; i < n_addresses ; i++) {
 115
 116 #ifdef PING6_COMMAND
 117                 if (address_family != AF_INET && is_inet6_addr(addresses[i]))
 118                         rawcmd = strdup(PING6_COMMAND);
 119                 else
 120                         rawcmd = strdup(PING_COMMAND);
 121 #else
 122                 rawcmd = strdup(PING_COMMAND);
 123 #endif
 124
 125                 /* does the host address of number of packets argument come first? */
 126 #ifdef PING_PACKETS_FIRST
 127 # ifdef PING_HAS_TIMEOUT
 128                 asprintf (&cmd, rawcmd, timeout_interval, max_packets, addresses[i]);
 129 # else
 130                 asprintf (&cmd, rawcmd, max_packets, addresses[i]);
 131 # endif
 132 #else
 133                 asprintf (&cmd, rawcmd, addresses[i], max_packets);
 134 #endif
 135
 136                 if (verbose >= 2)
 137                         printf ("CMD: %s\n", cmd);
 138
 139                 /* run the command */
 140                 this_result = run_ping (cmd, addresses[i]);
 141
 142                 if (pl == UNKNOWN_PACKET_LOSS || rta < 0.0) {
 143                         printf ("%s\n", cmd);
 144                         die (STATE_UNKNOWN,
 145                                    _("CRITICAL - Could not interpret output from ping command\n"));
 146                 }
 147
 148                 if (pl >= cpl || rta >= crta || rta < 0)
 149                         this_result = STATE_CRITICAL;
 150                 else if (pl >= wpl || rta >= wrta)
 151                         this_result = STATE_WARNING;
 152                 else if (pl >= 0 && rta >= 0)
 153                         this_result = max_state (STATE_OK, this_result);
 154
 155                 if (n_addresses > 1 && this_result != STATE_UNKNOWN)
 156                         die (STATE_OK, "%s is alive\n", addresses[i]);
 157
 158                 if (display_html == TRUE)
 159                         printf ("<A HREF='%s/traceroute.cgi?%s'>", CGIURL, addresses[i]);
 160                 if (pl == 100)
 161                         printf (_("PING %s - %sPacket loss = %d%%"), state_text (this_result), warn_text,
 162                                                         pl);
 163                 else
 164                         printf (_("PING %s - %sPacket loss = %d%%, RTA = %2.2f ms"),
 165                                                         state_text (this_result), warn_text, pl, rta);
 166                 if (display_html == TRUE)
 167                         printf ("</A>");
 168
 169                 /* Print performance data */
 170                 printf("|%s", fperfdata ("rta", (double) rta, "ms",
 171                                           wrta>0?TRUE:FALSE, wrta,
 172                                           crta>0?TRUE:FALSE, crta,
 173                                           TRUE, 0, FALSE, 0));
 174                 printf(" %s\n", perfdata ("pl", (long) pl, "%",
 175                                           wpl>0?TRUE:FALSE, wpl,
 176                                           cpl>0?TRUE:FALSE, cpl,
 177                                           TRUE, 0, FALSE, 0));
 178
 179                 if (verbose >= 2)
 180                         printf ("%f:%d%% %f:%d%%\n", wrta, wpl, crta, cpl);
 181
 182                 result = max_state (result, this_result);
 183                 free (rawcmd);
 184                 free (cmd);
 185         }
 186
 187         return result;
 188 }
 189
 190
 191
 192 /* process command-line arguments */
 193 int
 194 process_arguments (int argc, char **argv)
 195 {
 196         int c = 1;
 197         char *ptr;
 198
 199         int option = 0;
 200         static struct option longopts[] = {
 201                 STD_LONG_OPTS,
 202                 {"packets", required_argument, 0, 'p'},
 203                 {"nohtml", no_argument, 0, 'n'},
 204                 {"link", no_argument, 0, 'L'},
 205                 {"use-ipv4", no_argument, 0, '4'},
 206                 {"use-ipv6", no_argument, 0, '6'},
 207                 {0, 0, 0, 0}
 208         };
 209
 210         if (argc < 2)
 211                 return ERROR;
 212
 213         for (c = 1; c < argc; c++) {
 214                 if (strcmp ("-to", argv[c]) == 0)
 215                         strcpy (argv[c], "-t");
 216                 if (strcmp ("-nohtml", argv[c]) == 0)
 217                         strcpy (argv[c], "-n");
 218         }
 219
 220         while (1) {
 221                 c = getopt_long (argc, argv, "VvhnL46t:c:w:H:p:", longopts, &option);
 222
 223                 if (c == -1 || c == EOF)
 224                         break;
 225
 226                 switch (c) {
 227                 case '?':       /* usage */
 228                         usage5 ();
 229                 case 'h':       /* help */
 230                         print_help ();
 231                         exit (STATE_OK);
 232                         break;
 233                 case 'V':       /* version */
 234                         print_revision (progname, revision);
 235                         exit (STATE_OK);
 236                         break;
 237                 case 't':       /* timeout period */
 238                         timeout_interval = atoi (optarg);
 239                         break;
 240                 case 'v':       /* verbose mode */
 241                         verbose++;
 242                         break;
 243                 case '4':       /* IPv4 only */
 244                         address_family = AF_INET;
 245                         break;
 246                 case '6':       /* IPv6 only */
 247 #ifdef USE_IPV6
 248                         address_family = AF_INET6;
 249 #else
 250                         usage (_("IPv6 support not available\n"));
 251 #endif
 252                         break;
 253                 case 'H':       /* hostname */
 254                         ptr=optarg;
 255                         while (1) {
 256                                 n_addresses++;
 257                                 if (n_addresses > max_addr) {
 258                                         max_addr *= 2;
 259                                         addresses = realloc (addresses, sizeof(char*) * max_addr);
 260                                         if (addresses == NULL)
 261                                                 die (STATE_UNKNOWN, _("Could not realloc() addresses\n"));
 262                                 }
 263                                 addresses[n_addresses-1] = ptr;
 264                                 if ((ptr = index (ptr, ','))) {
 265                                         strcpy (ptr, "");
 266                                         ptr += sizeof(char);
 267                                 } else {
 268                                         break;
 269                                 }
 270                         }
 271                         break;
 272                 case 'p':       /* number of packets to send */
 273                         if (is_intnonneg (optarg))
 274                                 max_packets = atoi (optarg);
 275                         else
 276                                 usage2 (_("<max_packets> (%s) must be a non-negative number\n"), optarg);
 277                         break;
 278                 case 'n':       /* no HTML */
 279                         display_html = FALSE;
 280                         break;
 281                 case 'L':       /* show HTML */
 282                         display_html = TRUE;
 283                         break;
 284                 case 'c':
 285                         get_threshold (optarg, &crta, &cpl);
 286                         break;
 287                 case 'w':
 288                         get_threshold (optarg, &wrta, &wpl);
 289                         break;
 290                 }
 291         }
 292
 293         c = optind;
 294         if (c == argc)
 295                 return validate_arguments ();
 296
 297         if (addresses[0] == NULL) {
 298                 if (is_host (argv[c]) == FALSE) {
 299                         usage2 (_("Invalid hostname/address"), argv[c]);
 300                 } else {
 301                         addresses[0] = argv[c++];
 302                         n_addresses++;
 303                         if (c == argc)
 304                                 return validate_arguments ();
 305                 }
 306         }
 307
 308         if (wpl == UNKNOWN_PACKET_LOSS) {
 309                 if (is_intpercent (argv[c]) == FALSE) {
 310                         printf (_("<wpl> (%s) must be an integer percentage\n"), argv[c]);
 311                         return ERROR;
 312                 } else {
 313                         wpl = atoi (argv[c++]);
 314                         if (c == argc)
 315                                 return validate_arguments ();
 316                 }
 317         }
 318
 319         if (cpl == UNKNOWN_PACKET_LOSS) {
 320                 if (is_intpercent (argv[c]) == FALSE) {
 321                         printf (_("<cpl> (%s) must be an integer percentage\n"), argv[c]);
 322                         return ERROR;
 323                 } else {
 324                         cpl = atoi (argv[c++]);
 325                         if (c == argc)
 326                                 return validate_arguments ();
 327                 }
 328         }
 329
 330         if (wrta < 0.0) {
 331                 if (is_negative (argv[c])) {
 332                         printf (_("<wrta> (%s) must be a non-negative number\n"), argv[c]);
 333                         return ERROR;
 334                 } else {
 335                         wrta = atof (argv[c++]);
 336                         if (c == argc)
 337                                 return validate_arguments ();
 338                 }
 339         }
 340
 341         if (crta < 0.0) {
 342                 if (is_negative (argv[c])) {
 343                         printf (_("<crta> (%s) must be a non-negative number\n"), argv[c]);
 344                         return ERROR;
 345                 } else {
 346                         crta = atof (argv[c++]);
 347                         if (c == argc)
 348                                 return validate_arguments ();
 349                 }
 350         }
 351
 352         if (max_packets == -1) {
 353                 if (is_intnonneg (argv[c])) {
 354                         max_packets = atoi (argv[c++]);
 355                 } else {
 356                         printf (_("<max_packets> (%s) must be a non-negative number\n"), argv[c]);
 357                         return ERROR;
 358                 }
 359         }
 360
 361         return validate_arguments ();
 362 }
 363
 364
 365
 366 int
 367 get_threshold (char *arg, float *trta, int *tpl)
 368 {
 369         if (is_intnonneg (arg) && sscanf (arg, "%f", trta) == 1)
 370                 return OK;
 371         else if (strpbrk (arg, ",:") && strstr (arg, "%") && sscanf (arg, "%f%*[:,]%d%%", trta, tpl) == 2)
 372                 return OK;
 373         else if (strstr (arg, "%") && sscanf (arg, "%d%%", tpl) == 1)
 374                 return OK;
 375
 376         usage2 (_("%s: Warning threshold must be integer or percentage!\n\n"), arg);
 377         return STATE_UNKNOWN;
 378 }
 379
 380
 381
 382 int
 383 validate_arguments ()
 384 {
 385         float max_seconds;
 386         int i;
 387
 388         if (wrta < 0.0) {
 389                 printf (_("<wrta> was not set\n"));
 390                 return ERROR;
 391         }
 392         else if (crta < 0.0) {
 393                 printf (_("<crta> was not set\n"));
 394                 return ERROR;
 395         }
 396         else if (wpl == UNKNOWN_PACKET_LOSS) {
 397                 printf (_("<wpl> was not set\n"));
 398                 return ERROR;
 399         }
 400         else if (cpl == UNKNOWN_PACKET_LOSS) {
 401                 printf (_("<cpl> was not set\n"));
 402                 return ERROR;
 403         }
 404         else if (wrta > crta) {
 405                 printf (_("<wrta> (%f) cannot be larger than <crta> (%f)\n"), wrta, crta);
 406                 return ERROR;
 407         }
 408         else if (wpl > cpl) {
 409                 printf (_("<wpl> (%d) cannot be larger than <cpl> (%d)\n"), wpl, cpl);
 410                 return ERROR;
 411         }
 412
 413         if (max_packets == -1)
 414                 max_packets = DEFAULT_MAX_PACKETS;
 415
 416         max_seconds = crta / 1000.0 * max_packets + max_packets;
 417         if (max_seconds > timeout_interval)
 418                 timeout_interval = (int)max_seconds;
 419
 420         for (i=0; i<n_addresses; i++) {
 421                 if (is_host(addresses[i]) == FALSE)
 422                         usage2 (_("Invalid hostname/address"), addresses[i]);
 423         }
 424
 425         if (n_addresses == 0) {
 426                 usage (_("You must specify a server address or host name"));
 427         }
 428
 429         return OK;
 430 }
 431
 432
 433
 434 int
 435 run_ping (const char *cmd, const char *addr)
 436 {
 437         char buf[MAX_INPUT_BUFFER];
 438         int result = STATE_UNKNOWN;
 439
 440         if ((child_process = spopen (cmd)) == NULL)
 441                 die (STATE_UNKNOWN, _("Could not open pipe: %s\n"), cmd);
 442
 443         child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
 444         if (child_stderr == NULL)
 445                 printf (_("Cannot open stderr for %s\n"), cmd);
 446
 447         while (fgets (buf, MAX_INPUT_BUFFER - 1, child_process)) {
 448
 449                 if (verbose >= 3)
 450                         printf("Output: %s", buf);
 451
 452                 result = max_state (result, error_scan (buf, addr));
 453
 454                 /* get the percent loss statistics */
 455                 if(sscanf(buf,"%*d packets transmitted, %*d packets received, +%*d errors, %d%% packet loss",&pl)==1 ||
 456                          sscanf(buf,"%*d packets transmitted, %*d packets received, +%*d duplicates, %d%% packet loss", &pl) == 1 ||
 457                          sscanf(buf,"%*d packets transmitted, %*d received, +%*d duplicates, %d%% packet loss", &pl) == 1 ||
 458                          sscanf(buf,"%*d packets transmitted, %*d packets received, %d%% packet loss",&pl)==1 ||
 459                          sscanf(buf,"%*d packets transmitted, %*d packets received, %d%% loss, time",&pl)==1 ||
 460                          sscanf(buf,"%*d packets transmitted, %*d received, %d%% loss, time", &pl)==1 ||
 461                          sscanf(buf,"%*d packets transmitted, %*d received, %d%% packet loss, time", &pl)==1 ||
 462                          sscanf(buf,"%*d packets transmitted, %*d received, +%*d errors, %d%% packet loss", &pl) == 1 ||
 463                          sscanf(buf,"%*d packets transmitted %*d received, +%*d errors, %d%% packet loss", &pl) == 1
 464                          )
 465                         continue;
 466
 467                 /* get the round trip average */
 468                 else
 469                         if(sscanf(buf,"round-trip min/avg/max = %*f/%f/%*f",&rta)==1 ||
 470                                  sscanf(buf,"round-trip min/avg/max/mdev = %*f/%f/%*f/%*f",&rta)==1 ||
 471                                  sscanf(buf,"round-trip min/avg/max/sdev = %*f/%f/%*f/%*f",&rta)==1 ||
 472                                  sscanf(buf,"round-trip min/avg/max/stddev = %*f/%f/%*f/%*f",&rta)==1 ||
 473                                  sscanf(buf,"round-trip min/avg/max/std-dev = %*f/%f/%*f/%*f",&rta)==1 ||
 474                                  sscanf(buf,"round-trip (ms) min/avg/max = %*f/%f/%*f",&rta)==1 ||
 475                                  sscanf(buf,"round-trip (ms) min/avg/max/stddev = %*f/%f/%*f/%*f",&rta)==1 ||
 476                                  sscanf(buf,"rtt min/avg/max/mdev = %*f/%f/%*f/%*f ms",&rta)==1)
 477                         continue;
 478         }
 479
 480         /* this is needed because there is no rta if all packets are lost */
 481         if (pl == 100)
 482                 rta = crta;
 483
 484         /* check stderr, setting at least WARNING if there is output here */
 485         /* Add warning into warn_text */
 486         while (fgets (buf, MAX_INPUT_BUFFER - 1, child_stderr)) {
 487                 if (! strstr(buf,"WARNING - no SO_TIMESTAMP support, falling back to SIOCGSTAMP")) {
 488                         if (verbose >= 3) {
 489                                 printf("Got stderr: %s", buf);
 490                         }
 491                         if ((result=error_scan(buf, addr)) == STATE_OK) {
 492                                 result = STATE_WARNING;
 493                                 if (warn_text == NULL) {
 494                                         warn_text = strdup(_("System call sent warnings to stderr "));
 495                                 } else {
 496                                         asprintf(&warn_text, "%s %s", warn_text, _("System call sent warnings to stderr "));
 497                                 }
 498                         }
 499                 }
 500         }
 501
 502         (void) fclose (child_stderr);
 503
 504
 505         /* close the pipe - WARNING if status is set */
 506         if (spclose (child_process))
 507                 result = max_state (result, STATE_WARNING);
 508
 509         if (warn_text == NULL)
 510                 warn_text = strdup("");
 511
 512         return result;
 513 }
 514
 515
 516
 517 int
 518 error_scan (char buf[MAX_INPUT_BUFFER], const char *addr)
 519 {
 520         if (strstr (buf, "Network is unreachable") ||
 521                 strstr (buf, "Destination Net Unreachable")
 522                 )
 523                 die (STATE_CRITICAL, _("CRITICAL - Network Unreachable (%s)"), addr);
 524         else if (strstr (buf, "Destination Host Unreachable"))
 525                 die (STATE_CRITICAL, _("CRITICAL - Host Unreachable (%s)"), addr);
 526         else if (strstr (buf, "Destination Port Unreachable"))
 527                 die (STATE_CRITICAL, _("CRITICAL - Bogus ICMP: Port Unreachable (%s)"), addr);
 528         else if (strstr (buf, "Destination Protocol Unreachable"))
 529                 die (STATE_CRITICAL, _("CRITICAL - Bogus ICMP: Protocol Unreachable (%s)"), addr);
 530         else if (strstr (buf, "Destination Net Prohibited"))
 531                 die (STATE_CRITICAL, _("CRITICAL - Network Prohibited (%s)"), addr);
 532         else if (strstr (buf, "Destination Host Prohibited"))
 533                 die (STATE_CRITICAL, _("CRITICAL - Host Prohibited (%s)"), addr);
 534         else if (strstr (buf, "Packet filtered"))
 535                 die (STATE_CRITICAL, _("CRITICAL - Packet Filtered (%s)"), addr);
 536         else if (strstr (buf, "unknown host" ))
 537                 die (STATE_CRITICAL, _("CRITICAL - Host not found (%s)"), addr);
 538         else if (strstr (buf, "Time to live exceeded"))
 539                 die (STATE_CRITICAL, _("CRITICAL - Time to live exceeded (%s)"), addr);
 540
 541         if (strstr (buf, "(DUP!)") || strstr (buf, "DUPLICATES FOUND")) {
 542                 if (warn_text == NULL)
 543                         warn_text = strdup (_(WARN_DUPLICATES));
 544                 else if (! strstr (warn_text, _(WARN_DUPLICATES)) &&
 545                          asprintf (&warn_text, "%s %s", warn_text, _(WARN_DUPLICATES)) == -1)
 546                         die (STATE_UNKNOWN, _("Unable to realloc warn_text"));
 547                 return (STATE_WARNING);
 548         }
 549
 550         return (STATE_OK);
 551 }
 552
 553
 554
 555 void
 556 print_help (void)
 557 {
 558         print_revision (progname, revision);
 559
 560         printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
 561         printf (COPYRIGHT, copyright, email);
 562
 563         printf (_("Use ping to check connection statistics for a remote host."));
 564
 565   printf ("\n\n");
 566
 567         print_usage ();
 568
 569         printf (_(UT_HELP_VRSN));
 570         printf (_(UT_EXTRA_OPTS));
 571
 572         printf (_(UT_IPv46));
 573
 574         printf (" %s\n", "-H, --hostname=HOST");
 575   printf ("    %s\n", _("host to ping"));
 576   printf (" %s\n", "-w, --warning=THRESHOLD");
 577   printf ("    %s\n", _("warning threshold pair"));
 578   printf (" %s\n", "-c, --critical=THRESHOLD");
 579   printf ("    %s\n", _("critical threshold pair"));
 580   printf (" %s\n", "-p, --packets=INTEGER");
 581   printf ("    %s ", _("number of ICMP ECHO packets to send"));
 582   printf (_("(Default: %d)\n"), DEFAULT_MAX_PACKETS);
 583   printf (" %s\n", "-L, --link");
 584   printf ("    %s\n", _("show HTML in the plugin output (obsoleted by urlize)"));
 585
 586         printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
 587
 588   printf ("\n");
 589         printf ("%s\n", _("THRESHOLD is <rta>,<pl>% where <rta> is the round trip average travel"));
 590   printf ("%s\n", _("time (ms) which triggers a WARNING or CRITICAL state, and <pl> is the"));
 591   printf ("%s\n", _("percentage of packet loss to trigger an alarm state."));
 592
 593   printf ("\n");
 594         printf ("%s\n", _("This plugin uses the ping command to probe the specified host for packet loss"));
 595   printf ("%s\n", _("(percentage) and round trip average (milliseconds). It can produce HTML output"));
 596   printf ("%s\n", _("linking to a traceroute CGI contributed by Ian Cass. The CGI can be found in"));
 597   printf ("%s\n", _("the contrib area of the downloads section at http://www.nagios.org/"));
 598
 599 #ifdef NP_EXTRA_OPTS
 600   printf ("\n");
 601   printf ("%s\n", _("Notes:"));
 602   printf (_(UT_EXTRA_OPTS_NOTES));
 603 #endif
 604
 605         printf (_(UT_SUPPORT));
 606 }
 607
 608 void
 609 print_usage (void)
 610 {
 611   printf (_("Usage:"));
 612         printf ("%s -H <host_address> -w <wrta>,<wpl>%% -c <crta>,<cpl>%%\n", progname);
 613   printf (" [-p packets] [-t timeout] [-4|-6]\n");
 614 }