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
  68 # define OPING_GREEN 1
  69 # define OPING_YELLOW 2
  70 # define OPING_RED 3
  71 #endif
  72
  73 #include "oping.h"
  74
  75 #ifndef _POSIX_SAVED_IDS
  76 # define _POSIX_SAVED_IDS 0
  77 #endif
  78
  79 typedef struct ping_context
  80 {
  81         char host[NI_MAXHOST];
  82         char addr[NI_MAXHOST];
  83
  84         int req_sent;
  85         int req_rcvd;
  86
  87         double latency_min;
  88         double latency_max;
  89         double latency_total;
  90         double latency_total_square;
  91
  92 #if USE_NCURSES
  93         WINDOW *window;
  94 #endif
  95 } ping_context_t;
  96
  97 static double  opt_interval   = 1.0;
  98 static int     opt_addrfamily = PING_DEF_AF;
  99 static char   *opt_srcaddr    = NULL;
 100 static char   *opt_device     = NULL;
 101 static char   *opt_filename   = NULL;
 102 static int     opt_count      = -1;
 103 static int     opt_send_ttl   = 64;
 104
 105 #if USE_NCURSES
 106 static WINDOW *main_win = NULL;
 107 #endif
 108
 109 static void sigint_handler (int signal) /* {{{ */
 110 {
 111         /* Make compiler happy */
 112         signal = 0;
 113         /* Exit the loop */
 114         opt_count = 0;
 115 } /* }}} void sigint_handler */
 116
 117 static ping_context_t *context_create (void)
 118 {
 119         ping_context_t *ret;
 120
 121         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 122                 return (NULL);
 123
 124         memset (ret, '\0', sizeof (ping_context_t));
 125
 126         ret->latency_min   = -1.0;
 127         ret->latency_max   = -1.0;
 128         ret->latency_total = 0.0;
 129         ret->latency_total_square = 0.0;
 130
 131 #if USE_NCURSES
 132         ret->window = NULL;
 133 #endif
 134
 135         return (ret);
 136 }
 137
 138 static void context_destroy (ping_context_t *context)
 139 {
 140         if (context == NULL)
 141                 return;
 142
 143 #if USE_NCURSES
 144         if (context->window != NULL)
 145         {
 146                 delwin (context->window);
 147                 context->window = NULL;
 148         }
 149 #endif
 150
 151         free (context);
 152 }
 153
 154 static double context_get_average (ping_context_t *ctx) /* {{{ */
 155 {
 156         double num_total;
 157
 158         if (ctx == NULL)
 159                 return (-1.0);
 160
 161         if (ctx->req_rcvd < 1)
 162                 return (-0.0);
 163
 164         num_total = (double) ctx->req_rcvd;
 165         return (ctx->latency_total / num_total);
 166 } /* }}} double context_get_average */
 167
 168 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 169 {
 170         double num_total;
 171
 172         if (ctx == NULL)
 173                 return (-1.0);
 174
 175         if (ctx->req_rcvd < 1)
 176                 return (-0.0);
 177         else if (ctx->req_rcvd < 2)
 178                 return (0.0);
 179
 180         num_total = (double) ctx->req_rcvd;
 181         return (sqrt (((num_total * ctx->latency_total_square)
 182                                         - (ctx->latency_total * ctx->latency_total))
 183                                 / (num_total * (num_total - 1.0))));
 184 } /* }}} double context_get_stddev */
 185
 186 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 187 {
 188         if (ctx == NULL)
 189                 return (-1.0);
 190
 191         if (ctx->req_sent < 1)
 192                 return (0.0);
 193
 194         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 195                         / ((double) ctx->req_sent));
 196 } /* }}} double context_get_packet_loss */
 197
 198 static void usage_exit (const char *name, int status)
 199 {
 200         int name_length;
 201
 202         name_length = (int) strlen (name);
 203
 204         fprintf (stderr, "Usage: %s [OPTIONS] "
 205                                 "-f filename | host [host [host ...]]\n"
 206
 207                         "\nAvailable options:\n"
 208                         "  -4|-6        force the use of IPv4 or IPv6\n"
 209                         "  -c count     number of ICMP packets to send\n"
 210                         "  -i interval  interval with which to send ICMP packets\n"
 211                         "  -t ttl       time to live for each ICMP packet\n"
 212                         "  -I srcaddr   source address\n"
 213                         "  -D device    outgoing interface name\n"
 214                         "  -f filename  filename to read hosts from\n"
 215
 216                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 217                         "by Florian octo Forster <octo@verplant.org>\n"
 218                         "for contributions see `AUTHORS'\n",
 219                         name);
 220         exit (status);
 221 }
 222
 223 static int read_options (int argc, char **argv) /* {{{ */
 224 {
 225         int optchar;
 226
 227         while (1)
 228         {
 229                 optchar = getopt (argc, argv, "46c:hi:I:t:f:D:");
 230
 231                 if (optchar == -1)
 232                         break;
 233
 234                 switch (optchar)
 235                 {
 236                         case '4':
 237                         case '6':
 238                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 239                                 break;
 240
 241                         case 'c':
 242                                 {
 243                                         int new_count;
 244                                         new_count = atoi (optarg);
 245                                         if (new_count > 0)
 246                                                 opt_count = new_count;
 247                                         else
 248                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 249                                                                 optarg);
 250                                 }
 251                                 break;
 252
 253                         case 'f':
 254                                 {
 255                                         if (opt_filename != NULL)
 256                                                 free (opt_filename);
 257                                         opt_filename = strdup (optarg);
 258                                 }
 259                                 break;
 260
 261                         case 'i':
 262                                 {
 263                                         double new_interval;
 264                                         new_interval = atof (optarg);
 265                                         if (new_interval < 0.001)
 266                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 267                                                                 optarg);
 268                                         else
 269                                                 opt_interval = new_interval;
 270                                 }
 271                                 break;
 272                         case 'I':
 273                                 {
 274                                         if (opt_srcaddr != NULL)
 275                                                 free (opt_srcaddr);
 276                                         opt_srcaddr = strdup (optarg);
 277                                 }
 278                                 break;
 279
 280                         case 'D':
 281                                 opt_device = optarg;
 282                                 break;
 283
 284                         case 't':
 285                         {
 286                                 int new_send_ttl;
 287                                 new_send_ttl = atoi (optarg);
 288                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 289                                         opt_send_ttl = new_send_ttl;
 290                                 else
 291                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 292                                                         optarg);
 293                                 break;
 294                         }
 295
 296                         case 'h':
 297                                 usage_exit (argv[0], 0);
 298                                 break;
 299                         default:
 300                                 usage_exit (argv[0], 1);
 301                 }
 302         }
 303
 304         return (optind);
 305 } /* }}} read_options */
 306
 307 static void time_normalize (struct timespec *ts) /* {{{ */
 308 {
 309         while (ts->tv_nsec < 0)
 310         {
 311                 if (ts->tv_sec == 0)
 312                 {
 313                         ts->tv_nsec = 0;
 314                         return;
 315                 }
 316
 317                 ts->tv_sec  -= 1;
 318                 ts->tv_nsec += 1000000000;
 319         }
 320
 321         while (ts->tv_nsec >= 1000000000)
 322         {
 323                 ts->tv_sec  += 1;
 324                 ts->tv_nsec -= 1000000000;
 325         }
 326 } /* }}} void time_normalize */
 327
 328 static void time_calc (struct timespec *ts_dest, /* {{{ */
 329                 const struct timespec *ts_int,
 330                 const struct timeval  *tv_begin,
 331                 const struct timeval  *tv_end)
 332 {
 333         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 334         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 335         time_normalize (ts_dest);
 336
 337         /* Assure that `(begin + interval) > end'.
 338          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 339          * which may be `unsigned. *sigh* */
 340         if ((tv_end->tv_sec > ts_dest->tv_sec)
 341                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 342                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 343         {
 344                 ts_dest->tv_sec  = 0;
 345                 ts_dest->tv_nsec = 0;
 346                 return;
 347         }
 348
 349         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 350         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 351         time_normalize (ts_dest);
 352 } /* }}} void time_calc */
 353
 354 #if USE_NCURSES
 355 static int context_window_repaint (ping_context_t *ctx, /* {{{ */
 356                 int index)
 357 {
 358         if (ctx == NULL)
 359                 return (EINVAL);
 360
 361         if (ctx->window == NULL)
 362         {
 363                 ctx->window = newwin (/* height = */ 4, /* width = */ 0,
 364                                 /* start y = */ 4 * index, /* start x = */ 0);
 365         }
 366         else /* if (ctx->window != NULL) */
 367         {
 368                 werase (ctx->window);
 369         }
 370
 371         box (ctx->window, 0, 0);
 372         wattron (ctx->window, A_BOLD);
 373         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 374                         " %s ", ctx->host);
 375         wattroff (ctx->window, A_BOLD);
 376         wprintw (ctx->window, "ping statistics ");
 377         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 378                         "%i packets transmitted, %i received, %.2f%% packet "
 379                         "loss, time %.1fms",
 380                         ctx->req_sent, ctx->req_rcvd,
 381                         context_get_packet_loss (ctx),
 382                         ctx->latency_total);
 383         if (ctx->req_rcvd != 0)
 384         {
 385                 double average;
 386                 double deviation;
 387
 388                 average = context_get_average (ctx);
 389                 deviation = context_get_stddev (ctx);
 390
 391                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 392                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 393                                 ctx->latency_min,
 394                                 average,
 395                                 ctx->latency_max,
 396                                 deviation);
 397         }
 398
 399         wrefresh (ctx->window);
 400
 401         return (0);
 402 } /* }}} int context_window_repaint */
 403
 404 static int resize_windows (pingobj_t *ping) /* {{{ */
 405 {
 406         int index;
 407         pingobj_iter_t *iter;
 408         int width = 0;
 409         int height = 0;
 410         int need_resize = 0;
 411
 412         while (42)
 413         {
 414                 int key = wgetch (stdscr);
 415                 if (key == ERR)
 416                         break;
 417                 else if (key == KEY_RESIZE)
 418                         need_resize = 1;
 419         }
 420
 421         if (!need_resize)
 422                 return (0);
 423
 424         getmaxyx (stdscr, height, width);
 425         if ((height < 1) || (width < 1))
 426                 return (EINVAL);
 427
 428         index = 0;
 429         for (iter = ping_iterator_get (ping);
 430                         iter != NULL;
 431                         iter = ping_iterator_next (iter))
 432         {
 433                 ping_context_t *ctx = ping_iterator_get_context (iter);
 434
 435                 if (ctx->window == NULL)
 436                 {
 437                         index++;
 438                         continue;
 439                 }
 440
 441                 wresize (ctx->window, 4, width);
 442                 context_window_repaint (ctx, index);
 443
 444                 index++;
 445         }
 446
 447         if (main_win != NULL)
 448         {
 449                 wresize (main_win, height - (4 * index), width);
 450                 /* touchwin (main_win); */
 451                 /* wrefresh (main_win); */
 452                 clearok (main_win, TRUE);
 453         }
 454
 455         return (0);
 456 } /* }}} int resize_windows */
 457 #endif
 458
 459 static void print_host (pingobj_iter_t *iter, /* {{{ */
 460                 int index)
 461 {
 462         double          latency;
 463         unsigned int    sequence;
 464         int             recv_ttl;
 465         size_t          buffer_len;
 466         size_t          data_len;
 467         ping_context_t *context;
 468
 469         latency = -1.0;
 470         buffer_len = sizeof (latency);
 471         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 472                         &latency, &buffer_len);
 473
 474         sequence = 0;
 475         buffer_len = sizeof (sequence);
 476         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 477                         &sequence, &buffer_len);
 478
 479         recv_ttl = -1;
 480         buffer_len = sizeof (recv_ttl);
 481         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 482                         &recv_ttl, &buffer_len);
 483
 484         data_len = 0;
 485         ping_iterator_get_info (iter, PING_INFO_DATA,
 486                         NULL, &data_len);
 487
 488         context = (ping_context_t *) ping_iterator_get_context (iter);
 489
 490 #if USE_NCURSES
 491 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
 492 #else
 493 # define HOST_PRINTF(...) printf(__VA_ARGS__)
 494 #endif
 495
 496         context->req_sent++;
 497         if (latency > 0.0)
 498         {
 499                 context->req_rcvd++;
 500                 context->latency_total += latency;
 501                 context->latency_total_square += (latency * latency);
 502
 503                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 504                         context->latency_max = latency;
 505                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 506                         context->latency_min = latency;
 507
 508 #if USE_NCURSES
 509                 if (has_colors () == TRUE)
 510                 {
 511                         int color = OPING_GREEN;
 512                         double average = context_get_average (context);
 513                         double stddev = context_get_stddev (context);
 514
 515                         if ((latency < (average - (2 * stddev)))
 516                                         || (latency > (average + (2 * stddev))))
 517                                 color = OPING_RED;
 518                         else if ((latency < (average - stddev))
 519                                         || (latency > (average + stddev)))
 520                                 color = OPING_YELLOW;
 521
 522                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i "
 523                                         "time=",
 524                                         data_len, context->host, context->addr,
 525                                         sequence, recv_ttl);
 526                         wattron (main_win, COLOR_PAIR(color));
 527                         HOST_PRINTF ("%.2f", latency);
 528                         wattroff (main_win, COLOR_PAIR(color));
 529                         HOST_PRINTF (" ms\n");
 530                 }
 531                 else
 532                 {
 533 #endif
 534                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i "
 535                                 "time=%.2f ms\n",
 536                                 data_len,
 537                                 context->host, context->addr,
 538                                 sequence, recv_ttl, latency);
 539 #if USE_NCURSES
 540                 }
 541 #endif
 542         }
 543         else
 544         {
 545 #if USE_NCURSES
 546                 if (has_colors () == TRUE)
 547                 {
 548                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
 549                                         context->host, context->addr,
 550                                         sequence);
 551                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 552                         HOST_PRINTF ("timeout");
 553                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 554                         HOST_PRINTF ("\n");
 555                 }
 556                 else
 557                 {
 558 #endif
 559                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 560                                 context->host, context->addr,
 561                                 sequence);
 562 #if USE_NCURSES
 563                 }
 564 #endif
 565         }
 566
 567 #if USE_NCURSES
 568         context_window_repaint (context, index);
 569         wrefresh (main_win);
 570 #endif
 571 } /* }}} void print_host */
 572
 573 static int print_header (pingobj_t *ping) /* {{{ */
 574 {
 575         pingobj_iter_t *iter;
 576         int index;
 577
 578 #if USE_NCURSES
 579         initscr ();
 580         cbreak ();
 581         noecho ();
 582         nodelay (stdscr, TRUE);
 583
 584         if (has_colors () == TRUE)
 585         {
 586                 start_color ();
 587                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 588                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 589                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 590         }
 591 #endif
 592
 593         index = 0;
 594         for (iter = ping_iterator_get (ping);
 595                         iter != NULL;
 596                         iter = ping_iterator_next (iter))
 597         {
 598                 ping_context_t *context;
 599                 size_t buffer_size;
 600
 601                 context = context_create ();
 602
 603                 buffer_size = sizeof (context->host);
 604                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 605
 606                 buffer_size = sizeof (context->addr);
 607                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 608
 609                 buffer_size = 0;
 610                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 611
 612 #if USE_NCURSES
 613                 context_window_repaint (context, index);
 614 #else /* !USE_NCURSES */
 615                 printf ("PING %s (%s) %zu bytes of data.\n",
 616                                 context->host, context->addr, buffer_size);
 617 #endif
 618
 619                 ping_iterator_set_context (iter, (void *) context);
 620
 621                 index++;
 622         }
 623
 624 #if USE_NCURSES
 625         main_win = newwin (/* height = */ 0, /* width = */ 0,
 626                         /* y = */ 4 * index, /* x = */ 0);
 627         /* Allow scrolling */
 628         scrollok (main_win, TRUE);
 629         /* Allow hardware accelerated scrolling. */
 630         idlok (main_win, TRUE);
 631
 632         /* Don't know what good this does exactly, but without this code
 633          * "resize_windows" will be called right after startup and *somehow*
 634          * this leads to display errors. If we purge all initial characters
 635          * here, the problem goes away. "wgetch" is non-blocking due to
 636          * "nodelay" (see above). */
 637         while (wgetch (stdscr) != ERR)
 638         {
 639                 /* eat up characters */;
 640         }
 641 #endif
 642
 643         return (0);
 644 } /* }}} int print_header */
 645
 646 static int print_footer (pingobj_t *ping) /* {{{ */
 647 {
 648         pingobj_iter_t *iter;
 649
 650 #if USE_NCURSES
 651         endwin ();
 652 #endif
 653
 654         for (iter = ping_iterator_get (ping);
 655                         iter != NULL;
 656                         iter = ping_iterator_next (iter))
 657         {
 658                 ping_context_t *context;
 659
 660                 context = ping_iterator_get_context (iter);
 661
 662                 printf ("\n--- %s ping statistics ---\n"
 663                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 664                                 context->host, context->req_sent, context->req_rcvd,
 665                                 context_get_packet_loss (context),
 666                                 context->latency_total);
 667
 668                 if (context->req_rcvd != 0)
 669                 {
 670                         double average;
 671                         double deviation;
 672
 673                         average = context_get_average (context);
 674                         deviation = context_get_stddev (context);
 675
 676                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 677                                         context->latency_min,
 678                                         average,
 679                                         context->latency_max,
 680                                         deviation);
 681                 }
 682
 683                 ping_iterator_set_context (iter, NULL);
 684                 context_destroy (context);
 685         }
 686
 687         return (0);
 688 } /* }}} int print_footer */
 689
 690 int main (int argc, char **argv) /* {{{ */
 691 {
 692         pingobj_t      *ping;
 693         pingobj_iter_t *iter;
 694
 695         struct sigaction sigint_action;
 696
 697         struct timeval  tv_begin;
 698         struct timeval  tv_end;
 699         struct timespec ts_wait;
 700         struct timespec ts_int;
 701
 702         int optind;
 703         int i;
 704         int status;
 705 #if _POSIX_SAVED_IDS
 706         uid_t saved_set_uid;
 707
 708         /* Save the old effective user id */
 709         saved_set_uid = geteuid ();
 710         /* Set the effective user ID to the real user ID without changing the
 711          * saved set-user ID */
 712         status = seteuid (getuid ());
 713         if (status != 0)
 714         {
 715                 fprintf (stderr, "Temporarily dropping privileges "
 716                                 "failed: %s\n", strerror (errno));
 717                 exit (EXIT_FAILURE);
 718         }
 719 #endif
 720
 721         optind = read_options (argc, argv);
 722
 723 #if !_POSIX_SAVED_IDS
 724         /* Cannot temporarily drop privileges -> reject every file but "-". */
 725         if ((opt_filename != NULL)
 726                         && (strcmp ("-", opt_filename) != 0)
 727                         && (getuid () != geteuid ()))
 728         {
 729                 fprintf (stderr, "Your real and effective user IDs don't "
 730                                 "match. Reading from a file (option '-f')\n"
 731                                 "is therefore too risky. You can still read "
 732                                 "from STDIN using '-f -' if you like.\n"
 733                                 "Sorry.\n");
 734                 exit (EXIT_FAILURE);
 735         }
 736 #endif
 737
 738         if ((optind >= argc) && (opt_filename == NULL)) {
 739                 usage_exit (argv[0], 1);
 740         }
 741
 742         if ((ping = ping_construct ()) == NULL)
 743         {
 744                 fprintf (stderr, "ping_construct failed\n");
 745                 return (1);
 746         }
 747
 748         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
 749         {
 750                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
 751                                 opt_send_ttl, ping_get_error (ping));
 752         }
 753
 754         {
 755                 double temp_sec;
 756                 double temp_nsec;
 757
 758                 temp_nsec = modf (opt_interval, &temp_sec);
 759                 ts_int.tv_sec  = (time_t) temp_sec;
 760                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
 761
 762                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
 763         }
 764
 765         if (opt_addrfamily != PING_DEF_AF)
 766                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
 767
 768         if (opt_srcaddr != NULL)
 769         {
 770                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
 771                 {
 772                         fprintf (stderr, "Setting source address failed: %s\n",
 773                                         ping_get_error (ping));
 774                 }
 775         }
 776
 777         if (opt_device != NULL)
 778         {
 779                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
 780                 {
 781                         fprintf (stderr, "Setting device failed: %s\n",
 782                                         ping_get_error (ping));
 783                 }
 784         }
 785
 786         if (opt_filename != NULL)
 787         {
 788                 FILE *infile;
 789                 char line[256];
 790                 char host[256];
 791
 792                 if (strcmp (opt_filename, "-") == 0)
 793                         /* Open STDIN */
 794                         infile = fdopen(0, "r");
 795                 else
 796                         infile = fopen(opt_filename, "r");
 797
 798                 if (infile == NULL)
 799                 {
 800                         fprintf (stderr, "Opening %s failed: %s\n",
 801                                         (strcmp (opt_filename, "-") == 0)
 802                                         ? "STDIN" : opt_filename,
 803                                         strerror(errno));
 804                         return (1);
 805                 }
 806
 807 #if _POSIX_SAVED_IDS
 808                 /* Regain privileges */
 809                 status = seteuid (saved_set_uid);
 810                 if (status != 0)
 811                 {
 812                         fprintf (stderr, "Temporarily re-gaining privileges "
 813                                         "failed: %s\n", strerror (errno));
 814                         exit (EXIT_FAILURE);
 815                 }
 816 #endif
 817
 818                 while (fgets(line, sizeof(line), infile))
 819                 {
 820                         /* Strip whitespace */
 821                         if (sscanf(line, "%s", host) != 1)
 822                                 continue;
 823
 824                         if ((host[0] == 0) || (host[0] == '#'))
 825                                 continue;
 826
 827                         if (ping_host_add(ping, host) < 0)
 828                         {
 829                                 const char *errmsg = ping_get_error (ping);
 830
 831                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
 832                                 continue;
 833                         }
 834                 }
 835
 836 #if _POSIX_SAVED_IDS
 837                 /* Drop privileges */
 838                 status = seteuid (getuid ());
 839                 if (status != 0)
 840                 {
 841                         fprintf (stderr, "Temporarily dropping privileges "
 842                                         "failed: %s\n", strerror (errno));
 843                         exit (EXIT_FAILURE);
 844                 }
 845 #endif
 846
 847                 fclose(infile);
 848         }
 849
 850 #if _POSIX_SAVED_IDS
 851         /* Regain privileges */
 852         status = seteuid (saved_set_uid);
 853         if (status != 0)
 854         {
 855                 fprintf (stderr, "Temporarily re-gaining privileges "
 856                                 "failed: %s\n", strerror (errno));
 857                 exit (EXIT_FAILURE);
 858         }
 859 #endif
 860
 861         for (i = optind; i < argc; i++)
 862         {
 863                 if (ping_host_add (ping, argv[i]) < 0)
 864                 {
 865                         const char *errmsg = ping_get_error (ping);
 866
 867                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
 868                         continue;
 869                 }
 870         }
 871
 872         /* Permanently drop root privileges if we're setuid-root. */
 873         status = setuid (getuid ());
 874         if (status != 0)
 875         {
 876                 fprintf (stderr, "Dropping privileges failed: %s\n",
 877                                 strerror (errno));
 878                 exit (EXIT_FAILURE);
 879         }
 880
 881 #if _POSIX_SAVED_IDS
 882         saved_set_uid = (uid_t) -1;
 883 #endif
 884
 885         print_header (ping);
 886
 887         if (i == 0)
 888                 return (1);
 889
 890         memset (&sigint_action, '\0', sizeof (sigint_action));
 891         sigint_action.sa_handler = sigint_handler;
 892         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
 893         {
 894                 perror ("sigaction");
 895                 return (1);
 896         }
 897
 898         while (opt_count != 0)
 899         {
 900                 int index;
 901                 int status;
 902
 903                 if (gettimeofday (&tv_begin, NULL) < 0)
 904                 {
 905                         perror ("gettimeofday");
 906                         return (1);
 907                 }
 908
 909                 if (ping_send (ping) < 0)
 910                 {
 911                         fprintf (stderr, "ping_send failed: %s\n",
 912                                         ping_get_error (ping));
 913                         return (1);
 914                 }
 915
 916                 index = 0;
 917                 for (iter = ping_iterator_get (ping);
 918                                 iter != NULL;
 919                                 iter = ping_iterator_next (iter))
 920                 {
 921                         print_host (iter, index);
 922                         index++;
 923                 }
 924 #if !USE_NCURSES
 925                 fflush (stdout);
 926 #endif
 927
 928                 /* Don't sleep in the last iteration */
 929                 if (opt_count == 1)
 930                         break;
 931
 932                 if (gettimeofday (&tv_end, NULL) < 0)
 933                 {
 934                         perror ("gettimeofday");
 935                         return (1);
 936                 }
 937
 938                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
 939
 940                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
 941                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
 942                 {
 943                         if (errno != EINTR)
 944                         {
 945                                 perror ("nanosleep");
 946                                 break;
 947                         }
 948                         else if (opt_count == 0)
 949                         {
 950                                 /* sigint */
 951                                 break;
 952                         }
 953
 954 #if USE_NCURSES
 955                         resize_windows (ping);
 956 #endif
 957                 }
 958
 959 #if USE_NCURSES
 960                 resize_windows (ping);
 961 #endif
 962
 963                 if (opt_count > 0)
 964                         opt_count--;
 965         } /* while (opt_count != 0) */
 966
 967         print_footer (ping);
 968
 969         ping_destroy (ping);
 970
 971         return (0);
 972 } /* }}} int main */
 973
 974 /* vim: set fdm=marker : */