src/oping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006-2010  Florian octo Forster <octo at verplant.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; only version 2 of the License is
   8  * applicable.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18  */
  19
  20 #if HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #if STDC_HEADERS
  25 # include <stdlib.h>
  26 # include <stdio.h>
  27 # include <string.h>
  28 # include <errno.h>
  29 # include <assert.h>
  30 #else
  31 # error "You don't have the standard C99 header files installed"
  32 #endif /* STDC_HEADERS */
  33
  34 #if HAVE_UNISTD_H
  35 # include <unistd.h>
  36 #endif
  37
  38 #if HAVE_MATH_H
  39 # include <math.h>
  40 #endif
  41
  42 #if TIME_WITH_SYS_TIME
  43 # include <sys/time.h>
  44 # include <time.h>
  45 #else
  46 # if HAVE_SYS_TIME_H
  47 #  include <sys/time.h>
  48 # else
  49 #  include <time.h>
  50 # endif
  51 #endif
  52
  53 #if HAVE_NETDB_H
  54 # include <netdb.h> /* NI_MAXHOST */
  55 #endif
  56
  57 #if HAVE_SIGNAL_H
  58 # include <signal.h>
  59 #endif
  60
  61 #if HAVE_SYS_TYPES_H
  62 #include <sys/types.h>
  63 #endif
  64
  65 #if USE_NCURSES
  66 # include <ncurses.h>
  67 #endif
  68
  69 #include "oping.h"
  70
  71 #ifndef _POSIX_SAVED_IDS
  72 # define _POSIX_SAVED_IDS 0
  73 #endif
  74
  75 typedef struct ping_context
  76 {
  77         char host[NI_MAXHOST];
  78         char addr[NI_MAXHOST];
  79
  80         int req_sent;
  81         int req_rcvd;
  82
  83         double latency_min;
  84         double latency_max;
  85         double latency_total;
  86         double latency_total_square;
  87
  88 #if USE_NCURSES
  89         WINDOW *window;
  90 #endif
  91 } ping_context_t;
  92
  93 static double  opt_interval   = 1.0;
  94 static int     opt_addrfamily = PING_DEF_AF;
  95 static char   *opt_srcaddr    = NULL;
  96 static char   *opt_device     = NULL;
  97 static char   *opt_filename   = NULL;
  98 static int     opt_count      = -1;
  99 static int     opt_send_ttl   = 64;
 100
 101 #if USE_NCURSES
 102 static WINDOW *main_win = NULL;
 103 #endif
 104
 105 static void sigint_handler (int signal)
 106 {
 107         /* Make compiler happy */
 108         signal = 0;
 109         /* Exit the loop */
 110         opt_count = 0;
 111 }
 112
 113 static ping_context_t *context_create (void)
 114 {
 115         ping_context_t *ret;
 116
 117         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 118                 return (NULL);
 119
 120         memset (ret, '\0', sizeof (ping_context_t));
 121
 122         ret->latency_min   = -1.0;
 123         ret->latency_max   = -1.0;
 124         ret->latency_total = 0.0;
 125         ret->latency_total_square = 0.0;
 126
 127 #if USE_NCURSES
 128         ret->window = NULL;
 129 #endif
 130
 131         return (ret);
 132 }
 133
 134 static void context_destroy (ping_context_t *context)
 135 {
 136         if (context == NULL)
 137                 return;
 138
 139 #if USE_NCURSES
 140         if (context->window != NULL)
 141         {
 142                 delwin (context->window);
 143                 context->window = NULL;
 144         }
 145 #endif
 146
 147         free (context);
 148 }
 149
 150 static double context_get_average (ping_context_t *ctx) /* {{{ */
 151 {
 152         double num_total;
 153
 154         if (ctx == NULL)
 155                 return (-1.0);
 156
 157         if (ctx->req_rcvd < 1)
 158                 return (-0.0);
 159
 160         num_total = (double) ctx->req_rcvd;
 161         return (ctx->latency_total / num_total);
 162 } /* }}} double context_get_average */
 163
 164 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 165 {
 166         double num_total;
 167
 168         if (ctx == NULL)
 169                 return (-1.0);
 170
 171         if (ctx->req_rcvd < 1)
 172                 return (-0.0);
 173         else if (ctx->req_rcvd < 2)
 174                 return (0.0);
 175
 176         num_total = (double) ctx->req_rcvd;
 177         return (sqrt (((num_total * ctx->latency_total_square)
 178                                         - (ctx->latency_total * ctx->latency_total))
 179                                 / (num_total * (num_total - 1.0))));
 180 } /* }}} double context_get_stddev */
 181
 182 static void usage_exit (const char *name, int status)
 183 {
 184         int name_length;
 185
 186         name_length = (int) strlen (name);
 187
 188         fprintf (stderr, "Usage: %s [OPTIONS] "
 189                                 "-f filename | host [host [host ...]]\n"
 190
 191                         "\nAvailable options:\n"
 192                         "  -4|-6        force the use of IPv4 or IPv6\n"
 193                         "  -c count     number of ICMP packets to send\n"
 194                         "  -i interval  interval with which to send ICMP packets\n"
 195                         "  -t ttl       time to live for each ICMP packet\n"
 196                         "  -I srcaddr   source address\n"
 197                         "  -D device    outgoing interface name\n"
 198                         "  -f filename  filename to read hosts from\n"
 199
 200                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 201                         "by Florian octo Forster <octo@verplant.org>\n"
 202                         "for contributions see `AUTHORS'\n",
 203                         name);
 204         exit (status);
 205 }
 206
 207 static int read_options (int argc, char **argv)
 208 {
 209         int optchar;
 210
 211         while (1)
 212         {
 213                 optchar = getopt (argc, argv, "46c:hi:I:t:f:D:");
 214
 215                 if (optchar == -1)
 216                         break;
 217
 218                 switch (optchar)
 219                 {
 220                         case '4':
 221                         case '6':
 222                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 223                                 break;
 224
 225                         case 'c':
 226                                 {
 227                                         int new_count;
 228                                         new_count = atoi (optarg);
 229                                         if (new_count > 0)
 230                                                 opt_count = new_count;
 231                                         else
 232                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 233                                                                 optarg);
 234                                 }
 235                                 break;
 236
 237                         case 'f':
 238                                 {
 239                                         if (opt_filename != NULL)
 240                                                 free (opt_filename);
 241                                         opt_filename = strdup (optarg);
 242                                 }
 243                                 break;
 244
 245                         case 'i':
 246                                 {
 247                                         double new_interval;
 248                                         new_interval = atof (optarg);
 249                                         if (new_interval < 0.001)
 250                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 251                                                                 optarg);
 252                                         else
 253                                                 opt_interval = new_interval;
 254                                 }
 255                                 break;
 256                         case 'I':
 257                                 {
 258                                         if (opt_srcaddr != NULL)
 259                                                 free (opt_srcaddr);
 260                                         opt_srcaddr = strdup (optarg);
 261                                 }
 262                                 break;
 263
 264                         case 'D':
 265                                 opt_device = optarg;
 266                                 break;
 267
 268                         case 't':
 269                         {
 270                                 int new_send_ttl;
 271                                 new_send_ttl = atoi (optarg);
 272                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 273                                         opt_send_ttl = new_send_ttl;
 274                                 else
 275                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 276                                                         optarg);
 277                                 break;
 278                         }
 279
 280                         case 'h':
 281                                 usage_exit (argv[0], 0);
 282                                 break;
 283                         default:
 284                                 usage_exit (argv[0], 1);
 285                 }
 286         }
 287
 288         return (optind);
 289 }
 290
 291 static void print_host (pingobj_iter_t *iter)
 292 {
 293         double          latency;
 294         unsigned int    sequence;
 295         int             recv_ttl;
 296         size_t          buffer_len;
 297         size_t          data_len;
 298         ping_context_t *context;
 299
 300         latency = -1.0;
 301         buffer_len = sizeof (latency);
 302         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 303                         &latency, &buffer_len);
 304
 305         sequence = 0;
 306         buffer_len = sizeof (sequence);
 307         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 308                         &sequence, &buffer_len);
 309
 310         recv_ttl = -1;
 311         buffer_len = sizeof (recv_ttl);
 312         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 313                         &recv_ttl, &buffer_len);
 314
 315         data_len = 0;
 316         ping_iterator_get_info (iter, PING_INFO_DATA,
 317                         NULL, &data_len);
 318
 319         context = (ping_context_t *) ping_iterator_get_context (iter);
 320
 321 #if USE_NCURSES
 322 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
 323 #else
 324 # define HOST_PRINTF(...) printf(__VA_ARGS__)
 325 #endif
 326
 327         context->req_sent++;
 328         if (latency > 0.0)
 329         {
 330                 context->req_rcvd++;
 331                 context->latency_total += latency;
 332                 context->latency_total_square += (latency * latency);
 333
 334                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 335                         context->latency_max = latency;
 336                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 337                         context->latency_min = latency;
 338
 339                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i "
 340                                 "time=%.2f ms\n",
 341                                 data_len,
 342                                 context->host, context->addr,
 343                                 sequence, recv_ttl, latency);
 344         }
 345         else
 346         {
 347                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 348                                 context->host, context->addr,
 349                                 sequence);
 350         }
 351
 352 #if USE_NCURSES
 353         wrefresh (main_win);
 354         werase (context->window);
 355         box (context->window, 0, 0);
 356         mvwprintw (context->window, /* y = */ 0, /* x = */ 5,
 357                         " %s ping statistics ",
 358                         context->host);
 359         mvwprintw (context->window, /* y = */ 1, /* x = */ 2,
 360                         "%i packets transmitted, %i received, %.2f%% packet "
 361                         "loss, time %.1fms",
 362                         context->req_sent, context->req_rcvd,
 363                         100.0 * (context->req_sent - context->req_rcvd) / ((double) context->req_sent),
 364                         context->latency_total);
 365         if (context->req_rcvd != 0)
 366         {
 367                 double average;
 368                 double deviation;
 369
 370                 average = context_get_average (context);
 371                 deviation = context_get_stddev (context);
 372
 373                 mvwprintw (context->window, /* y = */ 2, /* x = */ 2,
 374                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 375                                 context->latency_min,
 376                                 average,
 377                                 context->latency_max,
 378                                 deviation);
 379         }
 380         wrefresh (context->window);
 381 #endif
 382 }
 383
 384 static void time_normalize (struct timespec *ts)
 385 {
 386         while (ts->tv_nsec < 0)
 387         {
 388                 if (ts->tv_sec == 0)
 389                 {
 390                         ts->tv_nsec = 0;
 391                         return;
 392                 }
 393
 394                 ts->tv_sec  -= 1;
 395                 ts->tv_nsec += 1000000000;
 396         }
 397
 398         while (ts->tv_nsec >= 1000000000)
 399         {
 400                 ts->tv_sec  += 1;
 401                 ts->tv_nsec -= 1000000000;
 402         }
 403 }
 404
 405 static void time_calc (struct timespec *ts_dest, /* {{{ */
 406                 const struct timespec *ts_int,
 407                 const struct timeval  *tv_begin,
 408                 const struct timeval  *tv_end)
 409 {
 410         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 411         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 412         time_normalize (ts_dest);
 413
 414         /* Assure that `(begin + interval) > end'.
 415          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 416          * which may be `unsigned. *sigh* */
 417         if ((tv_end->tv_sec > ts_dest->tv_sec)
 418                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 419                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 420         {
 421                 ts_dest->tv_sec  = 0;
 422                 ts_dest->tv_nsec = 0;
 423                 return;
 424         }
 425
 426         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 427         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 428         time_normalize (ts_dest);
 429 } /* }}} void time_calc */
 430
 431 static int print_header (pingobj_t *ping) /* {{{ */
 432 {
 433         pingobj_iter_t *iter;
 434         int i;
 435
 436 #if USE_NCURSES
 437         initscr ();
 438         cbreak ();
 439         noecho ();
 440 #endif
 441
 442         i = 0;
 443         for (iter = ping_iterator_get (ping);
 444                         iter != NULL;
 445                         iter = ping_iterator_next (iter))
 446         {
 447                 ping_context_t *context;
 448                 size_t buffer_size;
 449
 450                 context = context_create ();
 451
 452                 buffer_size = sizeof (context->host);
 453                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 454
 455                 buffer_size = sizeof (context->addr);
 456                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 457
 458                 buffer_size = 0;
 459                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 460
 461 #if USE_NCURSES
 462                 context->window = newwin (/* height = */ 4, COLS,
 463                                 /* start y = */ 4*i, /* start x = */ 0);
 464                 box (context->window, 0, 0);
 465                 mvwprintw (context->window, /* y = */ 0, /* x = */ 5,
 466                                 " %s ping statistics ",
 467                                 context->host);
 468                 wrefresh (context->window);
 469 #else /* !USE_NCURSES */
 470                 printf ("PING %s (%s) %zu bytes of data.\n",
 471                                 context->host, context->addr, buffer_size);
 472 #endif
 473
 474                 ping_iterator_set_context (iter, (void *) context);
 475
 476                 i++;
 477         }
 478
 479 #if USE_NCURSES
 480         delwin (main_win);
 481         main_win = newwin (LINES - 4*i, COLS, 4*i, 0);
 482         scrollok (main_win, TRUE);
 483 #endif
 484
 485         return (0);
 486 } /* }}} int print_header */
 487
 488 static int print_footer (pingobj_t *ping)
 489 {
 490         pingobj_iter_t *iter;
 491
 492 #if USE_NCURSES
 493         endwin ();
 494 #endif
 495
 496         for (iter = ping_iterator_get (ping);
 497                         iter != NULL;
 498                         iter = ping_iterator_next (iter))
 499         {
 500                 ping_context_t *context;
 501
 502                 context = ping_iterator_get_context (iter);
 503
 504                 printf ("\n--- %s ping statistics ---\n"
 505                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 506                                 context->host, context->req_sent, context->req_rcvd,
 507                                 100.0 * (context->req_sent - context->req_rcvd) / ((double) context->req_sent),
 508                                 context->latency_total);
 509
 510                 if (context->req_rcvd != 0)
 511                 {
 512                         double average;
 513                         double deviation;
 514
 515                         average = context_get_average (context);
 516                         deviation = context_get_stddev (context);
 517
 518                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 519                                         context->latency_min,
 520                                         average,
 521                                         context->latency_max,
 522                                         deviation);
 523                 }
 524
 525                 ping_iterator_set_context (iter, NULL);
 526                 context_destroy (context);
 527         }
 528
 529         return (0);
 530 } /* }}} int print_footer */
 531
 532 int main (int argc, char **argv) /* {{{ */
 533 {
 534         pingobj_t      *ping;
 535         pingobj_iter_t *iter;
 536
 537         struct sigaction sigint_action;
 538
 539         struct timeval  tv_begin;
 540         struct timeval  tv_end;
 541         struct timespec ts_wait;
 542         struct timespec ts_int;
 543
 544         int optind;
 545         int i;
 546         int status;
 547 #if _POSIX_SAVED_IDS
 548         uid_t saved_set_uid;
 549
 550         /* Save the old effective user id */
 551         saved_set_uid = geteuid ();
 552         /* Set the effective user ID to the real user ID without changing the
 553          * saved set-user ID */
 554         status = seteuid (getuid ());
 555         if (status != 0)
 556         {
 557                 fprintf (stderr, "Temporarily dropping privileges "
 558                                 "failed: %s\n", strerror (errno));
 559                 exit (EXIT_FAILURE);
 560         }
 561 #endif
 562
 563         optind = read_options (argc, argv);
 564
 565 #if !_POSIX_SAVED_IDS
 566         /* Cannot temporarily drop privileges -> reject every file but "-". */
 567         if ((opt_filename != NULL)
 568                         && (strcmp ("-", opt_filename) != 0)
 569                         && (getuid () != geteuid ()))
 570         {
 571                 fprintf (stderr, "Your real and effective user IDs don't "
 572                                 "match. Reading from a file (option '-f')\n"
 573                                 "is therefore too risky. You can still read "
 574                                 "from STDIN using '-f -' if you like.\n"
 575                                 "Sorry.\n");
 576                 exit (EXIT_FAILURE);
 577         }
 578 #endif
 579
 580         if ((optind >= argc) && (opt_filename == NULL)) {
 581                 usage_exit (argv[0], 1);
 582         }
 583
 584         if ((ping = ping_construct ()) == NULL)
 585         {
 586                 fprintf (stderr, "ping_construct failed\n");
 587                 return (1);
 588         }
 589
 590         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
 591         {
 592                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
 593                                 opt_send_ttl, ping_get_error (ping));
 594         }
 595
 596         {
 597                 double temp_sec;
 598                 double temp_nsec;
 599
 600                 temp_nsec = modf (opt_interval, &temp_sec);
 601                 ts_int.tv_sec  = (time_t) temp_sec;
 602                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
 603
 604                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
 605         }
 606
 607         if (opt_addrfamily != PING_DEF_AF)
 608                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
 609
 610         if (opt_srcaddr != NULL)
 611         {
 612                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
 613                 {
 614                         fprintf (stderr, "Setting source address failed: %s\n",
 615                                         ping_get_error (ping));
 616                 }
 617         }
 618
 619         if (opt_device != NULL)
 620         {
 621                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
 622                 {
 623                         fprintf (stderr, "Setting device failed: %s\n",
 624                                         ping_get_error (ping));
 625                 }
 626         }
 627
 628         if (opt_filename != NULL)
 629         {
 630                 FILE *infile;
 631                 char line[256];
 632                 char host[256];
 633
 634                 if (strcmp (opt_filename, "-") == 0)
 635                         /* Open STDIN */
 636                         infile = fdopen(0, "r");
 637                 else
 638                         infile = fopen(opt_filename, "r");
 639
 640                 if (infile == NULL)
 641                 {
 642                         fprintf (stderr, "Opening %s failed: %s\n",
 643                                         (strcmp (opt_filename, "-") == 0)
 644                                         ? "STDIN" : opt_filename,
 645                                         strerror(errno));
 646                         return (1);
 647                 }
 648
 649 #if _POSIX_SAVED_IDS
 650                 /* Regain privileges */
 651                 status = seteuid (saved_set_uid);
 652                 if (status != 0)
 653                 {
 654                         fprintf (stderr, "Temporarily re-gaining privileges "
 655                                         "failed: %s\n", strerror (errno));
 656                         exit (EXIT_FAILURE);
 657                 }
 658 #endif
 659
 660                 while (fgets(line, sizeof(line), infile))
 661                 {
 662                         /* Strip whitespace */
 663                         if (sscanf(line, "%s", host) != 1)
 664                                 continue;
 665
 666                         if ((host[0] == 0) || (host[0] == '#'))
 667                                 continue;
 668
 669                         if (ping_host_add(ping, host) < 0)
 670                         {
 671                                 const char *errmsg = ping_get_error (ping);
 672
 673                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
 674                                 continue;
 675                         }
 676                 }
 677
 678 #if _POSIX_SAVED_IDS
 679                 /* Drop privileges */
 680                 status = seteuid (getuid ());
 681                 if (status != 0)
 682                 {
 683                         fprintf (stderr, "Temporarily dropping privileges "
 684                                         "failed: %s\n", strerror (errno));
 685                         exit (EXIT_FAILURE);
 686                 }
 687 #endif
 688
 689                 fclose(infile);
 690         }
 691
 692 #if _POSIX_SAVED_IDS
 693         /* Regain privileges */
 694         status = seteuid (saved_set_uid);
 695         if (status != 0)
 696         {
 697                 fprintf (stderr, "Temporarily re-gaining privileges "
 698                                 "failed: %s\n", strerror (errno));
 699                 exit (EXIT_FAILURE);
 700         }
 701 #endif
 702
 703         for (i = optind; i < argc; i++)
 704         {
 705                 if (ping_host_add (ping, argv[i]) < 0)
 706                 {
 707                         const char *errmsg = ping_get_error (ping);
 708
 709                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
 710                         continue;
 711                 }
 712         }
 713
 714         /* Permanently drop root privileges if we're setuid-root. */
 715         status = setuid (getuid ());
 716         if (status != 0)
 717         {
 718                 fprintf (stderr, "Dropping privileges failed: %s\n",
 719                                 strerror (errno));
 720                 exit (EXIT_FAILURE);
 721         }
 722
 723 #if _POSIX_SAVED_IDS
 724         saved_set_uid = (uid_t) -1;
 725 #endif
 726
 727         print_header (ping);
 728
 729         if (i == 0)
 730                 return (1);
 731
 732         memset (&sigint_action, '\0', sizeof (sigint_action));
 733         sigint_action.sa_handler = sigint_handler;
 734         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
 735         {
 736                 perror ("sigaction");
 737                 return (1);
 738         }
 739
 740         while (opt_count != 0)
 741         {
 742                 int status;
 743
 744                 if (gettimeofday (&tv_begin, NULL) < 0)
 745                 {
 746                         perror ("gettimeofday");
 747                         return (1);
 748                 }
 749
 750                 if (ping_send (ping) < 0)
 751                 {
 752                         fprintf (stderr, "ping_send failed: %s\n",
 753                                         ping_get_error (ping));
 754                         return (1);
 755                 }
 756
 757                 for (iter = ping_iterator_get (ping);
 758                                 iter != NULL;
 759                                 iter = ping_iterator_next (iter))
 760                 {
 761                         print_host (iter);
 762                 }
 763                 fflush (stdout);
 764
 765                 /* Don't sleep in the last iteration */
 766                 if (opt_count == 1)
 767                         break;
 768
 769                 if (gettimeofday (&tv_end, NULL) < 0)
 770                 {
 771                         perror ("gettimeofday");
 772                         return (1);
 773                 }
 774
 775                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
 776
 777                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
 778                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
 779                 {
 780                         if (errno != EINTR)
 781                         {
 782                                 perror ("nanosleep");
 783                                 break;
 784                         }
 785                         else if (opt_count == 0)
 786                         {
 787                                 /* sigint */
 788                                 break;
 789                         }
 790                 }
 791
 792                 if (opt_count > 0)
 793                         opt_count--;
 794         } /* while (opt_count != 0) */
 795
 796         print_footer (ping);
 797
 798         ping_destroy (ping);
 799
 800         return (0);
 801 } /* }}} int main */
 802
 803 /* vim: set fdm=marker : */