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 # define NCURSES_OPAQUE 1
  67 # include <ncurses.h>
  68
  69 # define OPING_GREEN 1
  70 # define OPING_YELLOW 2
  71 # define OPING_RED 3
  72 #endif
  73
  74 #include "oping.h"
  75
  76 #ifndef _POSIX_SAVED_IDS
  77 # define _POSIX_SAVED_IDS 0
  78 #endif
  79
  80 typedef struct ping_context
  81 {
  82         char host[NI_MAXHOST];
  83         char addr[NI_MAXHOST];
  84
  85         int index;
  86         int req_sent;
  87         int req_rcvd;
  88
  89         double latency_min;
  90         double latency_max;
  91         double latency_total;
  92         double latency_total_square;
  93
  94 #if USE_NCURSES
  95         WINDOW *window;
  96 #endif
  97 } ping_context_t;
  98
  99 static double  opt_interval   = 1.0;
 100 static int     opt_addrfamily = PING_DEF_AF;
 101 static char   *opt_srcaddr    = NULL;
 102 static char   *opt_device     = NULL;
 103 static char   *opt_filename   = NULL;
 104 static int     opt_count      = -1;
 105 static int     opt_send_ttl   = 64;
 106 static unsigned opt_send_tos  = 0;
 107
 108 static int host_num = 0;
 109
 110 #if USE_NCURSES
 111 static WINDOW *main_win = NULL;
 112 #endif
 113
 114 static void sigint_handler (int signal) /* {{{ */
 115 {
 116         /* Make compiler happy */
 117         signal = 0;
 118         /* Exit the loop */
 119         opt_count = 0;
 120 } /* }}} void sigint_handler */
 121
 122 static ping_context_t *context_create (void) /* {{{ */
 123 {
 124         ping_context_t *ret;
 125
 126         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 127                 return (NULL);
 128
 129         memset (ret, '\0', sizeof (ping_context_t));
 130
 131         ret->latency_min   = -1.0;
 132         ret->latency_max   = -1.0;
 133         ret->latency_total = 0.0;
 134         ret->latency_total_square = 0.0;
 135
 136 #if USE_NCURSES
 137         ret->window = NULL;
 138 #endif
 139
 140         return (ret);
 141 } /* }}} ping_context_t *context_create */
 142
 143 static void context_destroy (ping_context_t *context) /* {{{ */
 144 {
 145         if (context == NULL)
 146                 return;
 147
 148 #if USE_NCURSES
 149         if (context->window != NULL)
 150         {
 151                 delwin (context->window);
 152                 context->window = NULL;
 153         }
 154 #endif
 155
 156         free (context);
 157 } /* }}} void context_destroy */
 158
 159 static double context_get_average (ping_context_t *ctx) /* {{{ */
 160 {
 161         double num_total;
 162
 163         if (ctx == NULL)
 164                 return (-1.0);
 165
 166         if (ctx->req_rcvd < 1)
 167                 return (-0.0);
 168
 169         num_total = (double) ctx->req_rcvd;
 170         return (ctx->latency_total / num_total);
 171 } /* }}} double context_get_average */
 172
 173 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 174 {
 175         double num_total;
 176
 177         if (ctx == NULL)
 178                 return (-1.0);
 179
 180         if (ctx->req_rcvd < 1)
 181                 return (-0.0);
 182         else if (ctx->req_rcvd < 2)
 183                 return (0.0);
 184
 185         num_total = (double) ctx->req_rcvd;
 186         return (sqrt (((num_total * ctx->latency_total_square)
 187                                         - (ctx->latency_total * ctx->latency_total))
 188                                 / (num_total * (num_total - 1.0))));
 189 } /* }}} double context_get_stddev */
 190
 191 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 192 {
 193         if (ctx == NULL)
 194                 return (-1.0);
 195
 196         if (ctx->req_sent < 1)
 197                 return (0.0);
 198
 199         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 200                         / ((double) ctx->req_sent));
 201 } /* }}} double context_get_packet_loss */
 202
 203 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 204 {
 205         pingobj_iter_t *iter;
 206         int index;
 207
 208         if (ping == NULL)
 209                 return (EINVAL);
 210
 211         index = 0;
 212         for (iter = ping_iterator_get (ping);
 213                         iter != NULL;
 214                         iter = ping_iterator_next (iter))
 215         {
 216                 ping_context_t *context;
 217                 size_t buffer_size;
 218
 219                 context = context_create ();
 220                 context->index = index;
 221
 222                 buffer_size = sizeof (context->host);
 223                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 224
 225                 buffer_size = sizeof (context->addr);
 226                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 227
 228                 ping_iterator_set_context (iter, (void *) context);
 229
 230                 index++;
 231         }
 232
 233         return (0);
 234 } /* }}} int ping_initialize_contexts */
 235
 236 static void usage_exit (const char *name, int status) /* {{{ */
 237 {
 238         int name_length;
 239
 240         name_length = (int) strlen (name);
 241
 242         fprintf (stderr, "Usage: %s [OPTIONS] "
 243                                 "-f filename | host [host [host ...]]\n"
 244
 245                         "\nAvailable options:\n"
 246                         "  -4|-6        force the use of IPv4 or IPv6\n"
 247                         "  -c count     number of ICMP packets to send\n"
 248                         "  -i interval  interval with which to send ICMP packets\n"
 249                         "  -t ttl       time to live for each ICMP packet\n"
 250                         "  -z tos       Type-of-service/class-of-service for each ICMP packet\n"
 251                         "  -I srcaddr   source address\n"
 252                         "  -D device    outgoing interface name\n"
 253                         "  -f filename  filename to read hosts from\n"
 254
 255                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 256                         "by Florian octo Forster <octo@verplant.org>\n"
 257                         "for contributions see `AUTHORS'\n",
 258                         name);
 259         exit (status);
 260 } /* }}} void usage_exit */
 261
 262 static int read_options (int argc, char **argv) /* {{{ */
 263 {
 264         int optchar;
 265
 266         while (1)
 267         {
 268                 optchar = getopt (argc, argv, "46c:hi:I:t:z:f:D:");
 269
 270                 if (optchar == -1)
 271                         break;
 272
 273                 switch (optchar)
 274                 {
 275                         case '4':
 276                         case '6':
 277                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 278                                 break;
 279
 280                         case 'c':
 281                                 {
 282                                         int new_count;
 283                                         new_count = atoi (optarg);
 284                                         if (new_count > 0)
 285                                                 opt_count = new_count;
 286                                         else
 287                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 288                                                                 optarg);
 289                                 }
 290                                 break;
 291
 292                         case 'f':
 293                                 {
 294                                         if (opt_filename != NULL)
 295                                                 free (opt_filename);
 296                                         opt_filename = strdup (optarg);
 297                                 }
 298                                 break;
 299
 300                         case 'i':
 301                                 {
 302                                         double new_interval;
 303                                         new_interval = atof (optarg);
 304                                         if (new_interval < 0.001)
 305                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 306                                                                 optarg);
 307                                         else
 308                                                 opt_interval = new_interval;
 309                                 }
 310                                 break;
 311                         case 'I':
 312                                 {
 313                                         if (opt_srcaddr != NULL)
 314                                                 free (opt_srcaddr);
 315                                         opt_srcaddr = strdup (optarg);
 316                                 }
 317                                 break;
 318
 319                         case 'D':
 320                                 opt_device = optarg;
 321                                 break;
 322
 323                         case 't':
 324                         {
 325                                 int new_send_ttl;
 326                                 new_send_ttl = atoi (optarg);
 327                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 328                                         opt_send_ttl = new_send_ttl;
 329                                 else
 330                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 331                                                         optarg);
 332                                 break;
 333                         }
 334
 335                         case 'z':
 336                         {
 337                                 int new_send_tos;
 338                                 new_send_tos = atoi (optarg);
 339                                 if ((new_send_tos > 0) && (new_send_tos < 256))
 340                                         opt_send_tos = new_send_tos;
 341                                 else
 342                                         fprintf (stderr, "Ignoring invalid TOS argument: %s\n",
 343                                                         optarg);
 344                                 break;
 345                         }
 346
 347                         case 'h':
 348                                 usage_exit (argv[0], 0);
 349                                 break;
 350                         default:
 351                                 usage_exit (argv[0], 1);
 352                 }
 353         }
 354
 355         return (optind);
 356 } /* }}} read_options */
 357
 358 static void time_normalize (struct timespec *ts) /* {{{ */
 359 {
 360         while (ts->tv_nsec < 0)
 361         {
 362                 if (ts->tv_sec == 0)
 363                 {
 364                         ts->tv_nsec = 0;
 365                         return;
 366                 }
 367
 368                 ts->tv_sec  -= 1;
 369                 ts->tv_nsec += 1000000000;
 370         }
 371
 372         while (ts->tv_nsec >= 1000000000)
 373         {
 374                 ts->tv_sec  += 1;
 375                 ts->tv_nsec -= 1000000000;
 376         }
 377 } /* }}} void time_normalize */
 378
 379 static void time_calc (struct timespec *ts_dest, /* {{{ */
 380                 const struct timespec *ts_int,
 381                 const struct timeval  *tv_begin,
 382                 const struct timeval  *tv_end)
 383 {
 384         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 385         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 386         time_normalize (ts_dest);
 387
 388         /* Assure that `(begin + interval) > end'.
 389          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 390          * which may be `unsigned. *sigh* */
 391         if ((tv_end->tv_sec > ts_dest->tv_sec)
 392                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 393                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 394         {
 395                 ts_dest->tv_sec  = 0;
 396                 ts_dest->tv_nsec = 0;
 397                 return;
 398         }
 399
 400         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 401         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 402         time_normalize (ts_dest);
 403 } /* }}} void time_calc */
 404
 405 #if USE_NCURSES
 406 static int update_stats_from_context (ping_context_t *ctx) /* {{{ */
 407 {
 408         if ((ctx == NULL) || (ctx->window == NULL))
 409                 return (EINVAL);
 410
 411         werase (ctx->window);
 412
 413         box (ctx->window, 0, 0);
 414         wattron (ctx->window, A_BOLD);
 415         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 416                         " %s ", ctx->host);
 417         wattroff (ctx->window, A_BOLD);
 418         wprintw (ctx->window, "ping statistics ");
 419         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 420                         "%i packets transmitted, %i received, %.2f%% packet "
 421                         "loss, time %.1fms",
 422                         ctx->req_sent, ctx->req_rcvd,
 423                         context_get_packet_loss (ctx),
 424                         ctx->latency_total);
 425         if (ctx->req_rcvd != 0)
 426         {
 427                 double average;
 428                 double deviation;
 429
 430                 average = context_get_average (ctx);
 431                 deviation = context_get_stddev (ctx);
 432
 433                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 434                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 435                                 ctx->latency_min,
 436                                 average,
 437                                 ctx->latency_max,
 438                                 deviation);
 439         }
 440
 441         wrefresh (ctx->window);
 442
 443         return (0);
 444 } /* }}} int update_stats_from_context */
 445
 446 static int on_resize (pingobj_t *ping) /* {{{ */
 447 {
 448         pingobj_iter_t *iter;
 449         int width = 0;
 450         int height = 0;
 451         int main_win_height;
 452
 453         getmaxyx (stdscr, height, width);
 454         if ((height < 1) || (width < 1))
 455                 return (EINVAL);
 456
 457         main_win_height = height - (4 * host_num);
 458         wresize (main_win, main_win_height, /* width = */ width);
 459         /* Allow scrolling */
 460         scrollok (main_win, TRUE);
 461         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 462         /* Allow hardware accelerated scrolling. */
 463         idlok (main_win, TRUE);
 464         wrefresh (main_win);
 465
 466         for (iter = ping_iterator_get (ping);
 467                         iter != NULL;
 468                         iter = ping_iterator_next (iter))
 469         {
 470                 ping_context_t *context;
 471
 472                 context = ping_iterator_get_context (iter);
 473                 if (context == NULL)
 474                         continue;
 475
 476                 if (context->window != NULL)
 477                 {
 478                         delwin (context->window);
 479                         context->window = NULL;
 480                 }
 481                 context->window = newwin (/* height = */ 4,
 482                                 /* width = */ 0,
 483                                 /* y = */ main_win_height + (4 * context->index),
 484                                 /* x = */ 0);
 485         }
 486
 487         return (0);
 488 } /* }}} */
 489
 490 static int check_resize (pingobj_t *ping) /* {{{ */
 491 {
 492         int need_resize = 0;
 493
 494         while (42)
 495         {
 496                 int key = wgetch (stdscr);
 497                 if (key == ERR)
 498                         break;
 499                 else if (key == KEY_RESIZE)
 500                         need_resize = 1;
 501         }
 502
 503         if (need_resize)
 504                 return (on_resize (ping));
 505         else
 506                 return (0);
 507 } /* }}} int check_resize */
 508
 509 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 510 {
 511         pingobj_iter_t *iter;
 512         int width = 0;
 513         int height = 0;
 514         int main_win_height;
 515
 516         initscr ();
 517         cbreak ();
 518         noecho ();
 519         nodelay (stdscr, TRUE);
 520
 521         getmaxyx (stdscr, height, width);
 522         if ((height < 1) || (width < 1))
 523                 return (EINVAL);
 524
 525         if (has_colors () == TRUE)
 526         {
 527                 start_color ();
 528                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 529                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 530                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 531         }
 532
 533         main_win_height = height - (4 * host_num);
 534         main_win = newwin (/* height = */ main_win_height,
 535                         /* width = */ 0,
 536                         /* y = */ 0, /* x = */ 0);
 537         /* Allow scrolling */
 538         scrollok (main_win, TRUE);
 539         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 540         /* Allow hardware accelerated scrolling. */
 541         idlok (main_win, TRUE);
 542         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
 543         wrefresh (main_win);
 544
 545         for (iter = ping_iterator_get (ping);
 546                         iter != NULL;
 547                         iter = ping_iterator_next (iter))
 548         {
 549                 ping_context_t *context;
 550
 551                 context = ping_iterator_get_context (iter);
 552                 if (context == NULL)
 553                         continue;
 554
 555                 if (context->window != NULL)
 556                 {
 557                         delwin (context->window);
 558                         context->window = NULL;
 559                 }
 560                 context->window = newwin (/* height = */ 4,
 561                                 /* width = */ 0,
 562                                 /* y = */ main_win_height + (4 * context->index),
 563                                 /* x = */ 0);
 564         }
 565
 566
 567         /* Don't know what good this does exactly, but without this code
 568          * "check_resize" will be called right after startup and *somehow*
 569          * this leads to display errors. If we purge all initial characters
 570          * here, the problem goes away. "wgetch" is non-blocking due to
 571          * "nodelay" (see above). */
 572         while (wgetch (stdscr) != ERR)
 573         {
 574                 /* eat up characters */;
 575         }
 576
 577         return (0);
 578 } /* }}} int pre_loop_hook */
 579
 580 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
 581 {
 582         return (check_resize (ping));
 583 } /* }}} int pre_sleep_hook */
 584
 585 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
 586 {
 587         return (check_resize (ping));
 588 } /* }}} int pre_sleep_hook */
 589 #else /* if !USE_NCURSES */
 590 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 591 {
 592         pingobj_iter_t *iter;
 593
 594         for (iter = ping_iterator_get (ping);
 595                         iter != NULL;
 596                         iter = ping_iterator_next (iter))
 597         {
 598                 ping_context_t *ctx;
 599                 size_t buffer_size;
 600
 601                 ctx = ping_iterator_get_context (iter);
 602                 if (ctx == NULL)
 603                         continue;
 604
 605                 buffer_size = 0;
 606                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 607
 608                 printf ("PING %s (%s) %zu bytes of data.\n",
 609                                 ctx->host, ctx->addr, buffer_size);
 610         }
 611
 612         return (0);
 613 } /* }}} int pre_loop_hook */
 614
 615 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 616 {
 617         fflush (stdout);
 618
 619         return (0);
 620 } /* }}} int pre_sleep_hook */
 621
 622 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 623 {
 624         return (0);
 625 } /* }}} int post_sleep_hook */
 626 #endif
 627
 628 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
 629                 int index)
 630 {
 631         double          latency;
 632         unsigned int    sequence;
 633         int             recv_ttl;
 634         unsigned        recv_tos;
 635         size_t          buffer_len;
 636         size_t          data_len;
 637         ping_context_t *context;
 638
 639         latency = -1.0;
 640         buffer_len = sizeof (latency);
 641         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 642                         &latency, &buffer_len);
 643
 644         sequence = 0;
 645         buffer_len = sizeof (sequence);
 646         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 647                         &sequence, &buffer_len);
 648
 649         recv_ttl = -1;
 650         buffer_len = sizeof (recv_ttl);
 651         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 652                         &recv_ttl, &buffer_len);
 653
 654         recv_tos = 0;
 655         buffer_len = sizeof (recv_tos);
 656         ping_iterator_get_info (iter, PING_INFO_TOS,
 657                         &recv_tos, &buffer_len);
 658
 659         data_len = 0;
 660         ping_iterator_get_info (iter, PING_INFO_DATA,
 661                         NULL, &data_len);
 662
 663         context = (ping_context_t *) ping_iterator_get_context (iter);
 664
 665 #if USE_NCURSES
 666 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
 667 #else
 668 # define HOST_PRINTF(...) printf(__VA_ARGS__)
 669 #endif
 670
 671         context->req_sent++;
 672         if (latency > 0.0)
 673         {
 674                 context->req_rcvd++;
 675                 context->latency_total += latency;
 676                 context->latency_total_square += (latency * latency);
 677
 678                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 679                         context->latency_max = latency;
 680                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 681                         context->latency_min = latency;
 682
 683 #if USE_NCURSES
 684                 if (has_colors () == TRUE)
 685                 {
 686                         int color = OPING_GREEN;
 687                         double average = context_get_average (context);
 688                         double stddev = context_get_stddev (context);
 689
 690                         if ((latency < (average - (2 * stddev)))
 691                                         || (latency > (average + (2 * stddev))))
 692                                 color = OPING_RED;
 693                         else if ((latency < (average - stddev))
 694                                         || (latency > (average + stddev)))
 695                                 color = OPING_YELLOW;
 696
 697                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i tos=%u "
 698                                         "time=",
 699                                         data_len, context->host, context->addr,
 700                                         sequence, recv_ttl, recv_tos);
 701                         wattron (main_win, COLOR_PAIR(color));
 702                         HOST_PRINTF ("%.2f", latency);
 703                         wattroff (main_win, COLOR_PAIR(color));
 704                         HOST_PRINTF (" ms\n");
 705                 }
 706                 else
 707                 {
 708 #endif
 709                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i tos=%u "
 710                                 "time=%.2f ms\n",
 711                                 data_len,
 712                                 context->host, context->addr,
 713                                 sequence, recv_ttl, recv_tos, latency);
 714 #if USE_NCURSES
 715                 }
 716 #endif
 717         }
 718         else
 719         {
 720 #if USE_NCURSES
 721                 if (has_colors () == TRUE)
 722                 {
 723                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
 724                                         context->host, context->addr,
 725                                         sequence);
 726                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 727                         HOST_PRINTF ("timeout");
 728                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 729                         HOST_PRINTF ("\n");
 730                 }
 731                 else
 732                 {
 733 #endif
 734                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 735                                 context->host, context->addr,
 736                                 sequence);
 737 #if USE_NCURSES
 738                 }
 739 #endif
 740         }
 741
 742 #if USE_NCURSES
 743         update_stats_from_context (context);
 744         wrefresh (main_win);
 745 #endif
 746 } /* }}} void update_host_hook */
 747
 748 static int post_loop_hook (pingobj_t *ping) /* {{{ */
 749 {
 750         pingobj_iter_t *iter;
 751
 752 #if USE_NCURSES
 753         endwin ();
 754 #endif
 755
 756         for (iter = ping_iterator_get (ping);
 757                         iter != NULL;
 758                         iter = ping_iterator_next (iter))
 759         {
 760                 ping_context_t *context;
 761
 762                 context = ping_iterator_get_context (iter);
 763
 764                 printf ("\n--- %s ping statistics ---\n"
 765                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 766                                 context->host, context->req_sent, context->req_rcvd,
 767                                 context_get_packet_loss (context),
 768                                 context->latency_total);
 769
 770                 if (context->req_rcvd != 0)
 771                 {
 772                         double average;
 773                         double deviation;
 774
 775                         average = context_get_average (context);
 776                         deviation = context_get_stddev (context);
 777
 778                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 779                                         context->latency_min,
 780                                         average,
 781                                         context->latency_max,
 782                                         deviation);
 783                 }
 784
 785                 ping_iterator_set_context (iter, NULL);
 786                 context_destroy (context);
 787         }
 788
 789         return (0);
 790 } /* }}} int post_loop_hook */
 791
 792 int main (int argc, char **argv) /* {{{ */
 793 {
 794         pingobj_t      *ping;
 795         pingobj_iter_t *iter;
 796
 797         struct sigaction sigint_action;
 798
 799         struct timeval  tv_begin;
 800         struct timeval  tv_end;
 801         struct timespec ts_wait;
 802         struct timespec ts_int;
 803
 804         int optind;
 805         int i;
 806         int status;
 807 #if _POSIX_SAVED_IDS
 808         uid_t saved_set_uid;
 809
 810         /* Save the old effective user id */
 811         saved_set_uid = geteuid ();
 812         /* Set the effective user ID to the real user ID without changing the
 813          * saved set-user ID */
 814         status = seteuid (getuid ());
 815         if (status != 0)
 816         {
 817                 fprintf (stderr, "Temporarily dropping privileges "
 818                                 "failed: %s\n", strerror (errno));
 819                 exit (EXIT_FAILURE);
 820         }
 821 #endif
 822
 823         optind = read_options (argc, argv);
 824
 825 #if !_POSIX_SAVED_IDS
 826         /* Cannot temporarily drop privileges -> reject every file but "-". */
 827         if ((opt_filename != NULL)
 828                         && (strcmp ("-", opt_filename) != 0)
 829                         && (getuid () != geteuid ()))
 830         {
 831                 fprintf (stderr, "Your real and effective user IDs don't "
 832                                 "match. Reading from a file (option '-f')\n"
 833                                 "is therefore too risky. You can still read "
 834                                 "from STDIN using '-f -' if you like.\n"
 835                                 "Sorry.\n");
 836                 exit (EXIT_FAILURE);
 837         }
 838 #endif
 839
 840         if ((optind >= argc) && (opt_filename == NULL)) {
 841                 usage_exit (argv[0], 1);
 842         }
 843
 844         if ((ping = ping_construct ()) == NULL)
 845         {
 846                 fprintf (stderr, "ping_construct failed\n");
 847                 return (1);
 848         }
 849
 850         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
 851         {
 852                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
 853                                 opt_send_ttl, ping_get_error (ping));
 854         }
 855
 856         if (ping_setopt (ping, PING_OPT_TOS, &opt_send_tos) != 0)
 857         {
 858                 fprintf (stderr, "Setting TOS to %i failed: %s\n",
 859                                 opt_send_tos, ping_get_error (ping));
 860         }
 861
 862         {
 863                 double temp_sec;
 864                 double temp_nsec;
 865
 866                 temp_nsec = modf (opt_interval, &temp_sec);
 867                 ts_int.tv_sec  = (time_t) temp_sec;
 868                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
 869
 870                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
 871         }
 872
 873         if (opt_addrfamily != PING_DEF_AF)
 874                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
 875
 876         if (opt_srcaddr != NULL)
 877         {
 878                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
 879                 {
 880                         fprintf (stderr, "Setting source address failed: %s\n",
 881                                         ping_get_error (ping));
 882                 }
 883         }
 884
 885         if (opt_device != NULL)
 886         {
 887                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
 888                 {
 889                         fprintf (stderr, "Setting device failed: %s\n",
 890                                         ping_get_error (ping));
 891                 }
 892         }
 893
 894         if (opt_filename != NULL)
 895         {
 896                 FILE *infile;
 897                 char line[256];
 898                 char host[256];
 899
 900                 if (strcmp (opt_filename, "-") == 0)
 901                         /* Open STDIN */
 902                         infile = fdopen(0, "r");
 903                 else
 904                         infile = fopen(opt_filename, "r");
 905
 906                 if (infile == NULL)
 907                 {
 908                         fprintf (stderr, "Opening %s failed: %s\n",
 909                                         (strcmp (opt_filename, "-") == 0)
 910                                         ? "STDIN" : opt_filename,
 911                                         strerror(errno));
 912                         return (1);
 913                 }
 914
 915 #if _POSIX_SAVED_IDS
 916                 /* Regain privileges */
 917                 status = seteuid (saved_set_uid);
 918                 if (status != 0)
 919                 {
 920                         fprintf (stderr, "Temporarily re-gaining privileges "
 921                                         "failed: %s\n", strerror (errno));
 922                         exit (EXIT_FAILURE);
 923                 }
 924 #endif
 925
 926                 while (fgets(line, sizeof(line), infile))
 927                 {
 928                         /* Strip whitespace */
 929                         if (sscanf(line, "%s", host) != 1)
 930                                 continue;
 931
 932                         if ((host[0] == 0) || (host[0] == '#'))
 933                                 continue;
 934
 935                         if (ping_host_add(ping, host) < 0)
 936                         {
 937                                 const char *errmsg = ping_get_error (ping);
 938
 939                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
 940                                 continue;
 941                         }
 942                         else
 943                         {
 944                                 host_num++;
 945                         }
 946                 }
 947
 948 #if _POSIX_SAVED_IDS
 949                 /* Drop privileges */
 950                 status = seteuid (getuid ());
 951                 if (status != 0)
 952                 {
 953                         fprintf (stderr, "Temporarily dropping privileges "
 954                                         "failed: %s\n", strerror (errno));
 955                         exit (EXIT_FAILURE);
 956                 }
 957 #endif
 958
 959                 fclose(infile);
 960         }
 961
 962 #if _POSIX_SAVED_IDS
 963         /* Regain privileges */
 964         status = seteuid (saved_set_uid);
 965         if (status != 0)
 966         {
 967                 fprintf (stderr, "Temporarily re-gaining privileges "
 968                                 "failed: %s\n", strerror (errno));
 969                 exit (EXIT_FAILURE);
 970         }
 971 #endif
 972
 973         for (i = optind; i < argc; i++)
 974         {
 975                 if (ping_host_add (ping, argv[i]) < 0)
 976                 {
 977                         const char *errmsg = ping_get_error (ping);
 978
 979                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
 980                         continue;
 981                 }
 982                 else
 983                 {
 984                         host_num++;
 985                 }
 986         }
 987
 988         /* Permanently drop root privileges if we're setuid-root. */
 989         status = setuid (getuid ());
 990         if (status != 0)
 991         {
 992                 fprintf (stderr, "Dropping privileges failed: %s\n",
 993                                 strerror (errno));
 994                 exit (EXIT_FAILURE);
 995         }
 996
 997 #if _POSIX_SAVED_IDS
 998         saved_set_uid = (uid_t) -1;
 999 #endif
1000
1001         ping_initialize_contexts (ping);
1002
1003         if (i == 0)
1004                 return (1);
1005
1006         memset (&sigint_action, '\0', sizeof (sigint_action));
1007         sigint_action.sa_handler = sigint_handler;
1008         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1009         {
1010                 perror ("sigaction");
1011                 return (1);
1012         }
1013
1014         pre_loop_hook (ping);
1015
1016         while (opt_count != 0)
1017         {
1018                 int index;
1019                 int status;
1020
1021                 if (gettimeofday (&tv_begin, NULL) < 0)
1022                 {
1023                         perror ("gettimeofday");
1024                         return (1);
1025                 }
1026
1027                 if (ping_send (ping) < 0)
1028                 {
1029                         fprintf (stderr, "ping_send failed: %s\n",
1030                                         ping_get_error (ping));
1031                         return (1);
1032                 }
1033
1034                 index = 0;
1035                 for (iter = ping_iterator_get (ping);
1036                                 iter != NULL;
1037                                 iter = ping_iterator_next (iter))
1038                 {
1039                         update_host_hook (iter, index);
1040                         index++;
1041                 }
1042
1043                 pre_sleep_hook (ping);
1044
1045                 /* Don't sleep in the last iteration */
1046                 if (opt_count == 1)
1047                         break;
1048
1049                 if (gettimeofday (&tv_end, NULL) < 0)
1050                 {
1051                         perror ("gettimeofday");
1052                         return (1);
1053                 }
1054
1055                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1056
1057                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1058                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1059                 {
1060                         if (errno != EINTR)
1061                         {
1062                                 perror ("nanosleep");
1063                                 break;
1064                         }
1065                         else if (opt_count == 0)
1066                         {
1067                                 /* sigint */
1068                                 break;
1069                         }
1070                 }
1071
1072                 post_sleep_hook (ping);
1073
1074                 if (opt_count > 0)
1075                         opt_count--;
1076         } /* while (opt_count != 0) */
1077
1078         post_loop_hook (ping);
1079
1080         ping_destroy (ping);
1081
1082         return (0);
1083 } /* }}} int main */
1084
1085 /* vim: set fdm=marker : */