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