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 <stdint.h>
  29 # include <inttypes.h>
  30 # include <errno.h>
  31 # include <assert.h>
  32 #else
  33 # error "You don't have the standard C99 header files installed"
  34 #endif /* STDC_HEADERS */
  35
  36 #if HAVE_UNISTD_H
  37 # include <unistd.h>
  38 #endif
  39
  40 #if HAVE_MATH_H
  41 # include <math.h>
  42 #endif
  43
  44 #if TIME_WITH_SYS_TIME
  45 # include <sys/time.h>
  46 # include <time.h>
  47 #else
  48 # if HAVE_SYS_TIME_H
  49 #  include <sys/time.h>
  50 # else
  51 #  include <time.h>
  52 # endif
  53 #endif
  54
  55 #if HAVE_NETDB_H
  56 # include <netdb.h> /* NI_MAXHOST */
  57 #endif
  58
  59 #if HAVE_SIGNAL_H
  60 # include <signal.h>
  61 #endif
  62
  63 #if HAVE_SYS_TYPES_H
  64 #include <sys/types.h>
  65 #endif
  66
  67 #if USE_NCURSES
  68 # define NCURSES_OPAQUE 1
  69 # include <ncurses.h>
  70
  71 # define OPING_GREEN 1
  72 # define OPING_YELLOW 2
  73 # define OPING_RED 3
  74 #endif
  75
  76 #include "oping.h"
  77
  78 #ifndef _POSIX_SAVED_IDS
  79 # define _POSIX_SAVED_IDS 0
  80 #endif
  81
  82 typedef struct ping_context
  83 {
  84         char host[NI_MAXHOST];
  85         char addr[NI_MAXHOST];
  86
  87         int index;
  88         int req_sent;
  89         int req_rcvd;
  90
  91         double latency_min;
  92         double latency_max;
  93         double latency_total;
  94         double latency_total_square;
  95
  96 #if USE_NCURSES
  97         WINDOW *window;
  98 #endif
  99 } ping_context_t;
 100
 101 static double  opt_interval   = 1.0;
 102 static int     opt_addrfamily = PING_DEF_AF;
 103 static char   *opt_srcaddr    = NULL;
 104 static char   *opt_device     = NULL;
 105 static char   *opt_filename   = NULL;
 106 static int     opt_count      = -1;
 107 static int     opt_send_ttl   = 64;
 108 static unsigned opt_send_tos  = 0;
 109
 110 static int host_num = 0;
 111
 112 #if USE_NCURSES
 113 static WINDOW *main_win = NULL;
 114 #endif
 115
 116 static void sigint_handler (int signal) /* {{{ */
 117 {
 118         /* Make compiler happy */
 119         signal = 0;
 120         /* Exit the loop */
 121         opt_count = 0;
 122 } /* }}} void sigint_handler */
 123
 124 static ping_context_t *context_create (void) /* {{{ */
 125 {
 126         ping_context_t *ret;
 127
 128         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 129                 return (NULL);
 130
 131         memset (ret, '\0', sizeof (ping_context_t));
 132
 133         ret->latency_min   = -1.0;
 134         ret->latency_max   = -1.0;
 135         ret->latency_total = 0.0;
 136         ret->latency_total_square = 0.0;
 137
 138 #if USE_NCURSES
 139         ret->window = NULL;
 140 #endif
 141
 142         return (ret);
 143 } /* }}} ping_context_t *context_create */
 144
 145 static void context_destroy (ping_context_t *context) /* {{{ */
 146 {
 147         if (context == NULL)
 148                 return;
 149
 150 #if USE_NCURSES
 151         if (context->window != NULL)
 152         {
 153                 delwin (context->window);
 154                 context->window = NULL;
 155         }
 156 #endif
 157
 158         free (context);
 159 } /* }}} void context_destroy */
 160
 161 static double context_get_average (ping_context_t *ctx) /* {{{ */
 162 {
 163         double num_total;
 164
 165         if (ctx == NULL)
 166                 return (-1.0);
 167
 168         if (ctx->req_rcvd < 1)
 169                 return (-0.0);
 170
 171         num_total = (double) ctx->req_rcvd;
 172         return (ctx->latency_total / num_total);
 173 } /* }}} double context_get_average */
 174
 175 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 176 {
 177         double num_total;
 178
 179         if (ctx == NULL)
 180                 return (-1.0);
 181
 182         if (ctx->req_rcvd < 1)
 183                 return (-0.0);
 184         else if (ctx->req_rcvd < 2)
 185                 return (0.0);
 186
 187         num_total = (double) ctx->req_rcvd;
 188         return (sqrt (((num_total * ctx->latency_total_square)
 189                                         - (ctx->latency_total * ctx->latency_total))
 190                                 / (num_total * (num_total - 1.0))));
 191 } /* }}} double context_get_stddev */
 192
 193 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 194 {
 195         if (ctx == NULL)
 196                 return (-1.0);
 197
 198         if (ctx->req_sent < 1)
 199                 return (0.0);
 200
 201         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 202                         / ((double) ctx->req_sent));
 203 } /* }}} double context_get_packet_loss */
 204
 205 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 206 {
 207         pingobj_iter_t *iter;
 208         int index;
 209
 210         if (ping == NULL)
 211                 return (EINVAL);
 212
 213         index = 0;
 214         for (iter = ping_iterator_get (ping);
 215                         iter != NULL;
 216                         iter = ping_iterator_next (iter))
 217         {
 218                 ping_context_t *context;
 219                 size_t buffer_size;
 220
 221                 context = context_create ();
 222                 context->index = index;
 223
 224                 buffer_size = sizeof (context->host);
 225                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 226
 227                 buffer_size = sizeof (context->addr);
 228                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 229
 230                 ping_iterator_set_context (iter, (void *) context);
 231
 232                 index++;
 233         }
 234
 235         return (0);
 236 } /* }}} int ping_initialize_contexts */
 237
 238 static void usage_exit (const char *name, int status) /* {{{ */
 239 {
 240         int name_length;
 241
 242         name_length = (int) strlen (name);
 243
 244         fprintf (stderr, "Usage: %s [OPTIONS] "
 245                                 "-f filename | host [host [host ...]]\n"
 246
 247                         "\nAvailable options:\n"
 248                         "  -4|-6        force the use of IPv4 or IPv6\n"
 249                         "  -c count     number of ICMP packets to send\n"
 250                         "  -i interval  interval with which to send ICMP packets\n"
 251                         "  -t ttl       time to live for each ICMP packet\n"
 252                         "  -z tos       Type-of-service/class-of-service for each ICMP packet\n"
 253                         "  -I srcaddr   source address\n"
 254                         "  -D device    outgoing interface name\n"
 255                         "  -f filename  filename to read hosts from\n"
 256
 257                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 258                         "by Florian octo Forster <octo@verplant.org>\n"
 259                         "for contributions see `AUTHORS'\n",
 260                         name);
 261         exit (status);
 262 } /* }}} void usage_exit */
 263
 264 static int read_options (int argc, char **argv) /* {{{ */
 265 {
 266         int optchar;
 267
 268         while (1)
 269         {
 270                 optchar = getopt (argc, argv, "46c:hi:I:t:z:f:D:");
 271
 272                 if (optchar == -1)
 273                         break;
 274
 275                 switch (optchar)
 276                 {
 277                         case '4':
 278                         case '6':
 279                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 280                                 break;
 281
 282                         case 'c':
 283                                 {
 284                                         int new_count;
 285                                         new_count = atoi (optarg);
 286                                         if (new_count > 0)
 287                                                 opt_count = new_count;
 288                                         else
 289                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 290                                                                 optarg);
 291                                 }
 292                                 break;
 293
 294                         case 'f':
 295                                 {
 296                                         if (opt_filename != NULL)
 297                                                 free (opt_filename);
 298                                         opt_filename = strdup (optarg);
 299                                 }
 300                                 break;
 301
 302                         case 'i':
 303                                 {
 304                                         double new_interval;
 305                                         new_interval = atof (optarg);
 306                                         if (new_interval < 0.001)
 307                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 308                                                                 optarg);
 309                                         else
 310                                                 opt_interval = new_interval;
 311                                 }
 312                                 break;
 313                         case 'I':
 314                                 {
 315                                         if (opt_srcaddr != NULL)
 316                                                 free (opt_srcaddr);
 317                                         opt_srcaddr = strdup (optarg);
 318                                 }
 319                                 break;
 320
 321                         case 'D':
 322                                 opt_device = optarg;
 323                                 break;
 324
 325                         case 't':
 326                         {
 327                                 int new_send_ttl;
 328                                 new_send_ttl = atoi (optarg);
 329                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 330                                         opt_send_ttl = new_send_ttl;
 331                                 else
 332                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 333                                                         optarg);
 334                                 break;
 335                         }
 336
 337                         case 'z':
 338                         {
 339                                 int new_send_tos;
 340                                 new_send_tos = atoi (optarg);
 341                                 if ((new_send_tos > 0) && (new_send_tos < 256))
 342                                         opt_send_tos = new_send_tos;
 343                                 else
 344                                         fprintf (stderr, "Ignoring invalid TOS argument: %s\n",
 345                                                         optarg);
 346                                 break;
 347                         }
 348
 349                         case 'h':
 350                                 usage_exit (argv[0], 0);
 351                                 break;
 352                         default:
 353                                 usage_exit (argv[0], 1);
 354                 }
 355         }
 356
 357         return (optind);
 358 } /* }}} read_options */
 359
 360 static void time_normalize (struct timespec *ts) /* {{{ */
 361 {
 362         while (ts->tv_nsec < 0)
 363         {
 364                 if (ts->tv_sec == 0)
 365                 {
 366                         ts->tv_nsec = 0;
 367                         return;
 368                 }
 369
 370                 ts->tv_sec  -= 1;
 371                 ts->tv_nsec += 1000000000;
 372         }
 373
 374         while (ts->tv_nsec >= 1000000000)
 375         {
 376                 ts->tv_sec  += 1;
 377                 ts->tv_nsec -= 1000000000;
 378         }
 379 } /* }}} void time_normalize */
 380
 381 static void time_calc (struct timespec *ts_dest, /* {{{ */
 382                 const struct timespec *ts_int,
 383                 const struct timeval  *tv_begin,
 384                 const struct timeval  *tv_end)
 385 {
 386         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 387         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 388         time_normalize (ts_dest);
 389
 390         /* Assure that `(begin + interval) > end'.
 391          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 392          * which may be `unsigned. *sigh* */
 393         if ((tv_end->tv_sec > ts_dest->tv_sec)
 394                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 395                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 396         {
 397                 ts_dest->tv_sec  = 0;
 398                 ts_dest->tv_nsec = 0;
 399                 return;
 400         }
 401
 402         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 403         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 404         time_normalize (ts_dest);
 405 } /* }}} void time_calc */
 406
 407 #if USE_NCURSES
 408 static int update_stats_from_context (ping_context_t *ctx) /* {{{ */
 409 {
 410         if ((ctx == NULL) || (ctx->window == NULL))
 411                 return (EINVAL);
 412
 413         werase (ctx->window);
 414
 415         box (ctx->window, 0, 0);
 416         wattron (ctx->window, A_BOLD);
 417         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 418                         " %s ", ctx->host);
 419         wattroff (ctx->window, A_BOLD);
 420         wprintw (ctx->window, "ping statistics ");
 421         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 422                         "%i packets transmitted, %i received, %.2f%% packet "
 423                         "loss, time %.1fms",
 424                         ctx->req_sent, ctx->req_rcvd,
 425                         context_get_packet_loss (ctx),
 426                         ctx->latency_total);
 427         if (ctx->req_rcvd != 0)
 428         {
 429                 double average;
 430                 double deviation;
 431
 432                 average = context_get_average (ctx);
 433                 deviation = context_get_stddev (ctx);
 434
 435                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 436                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 437                                 ctx->latency_min,
 438                                 average,
 439                                 ctx->latency_max,
 440                                 deviation);
 441         }
 442
 443         wrefresh (ctx->window);
 444
 445         return (0);
 446 } /* }}} int update_stats_from_context */
 447
 448 static int on_resize (pingobj_t *ping) /* {{{ */
 449 {
 450         pingobj_iter_t *iter;
 451         int width = 0;
 452         int height = 0;
 453         int main_win_height;
 454
 455         getmaxyx (stdscr, height, width);
 456         if ((height < 1) || (width < 1))
 457                 return (EINVAL);
 458
 459         main_win_height = height - (4 * host_num);
 460         wresize (main_win, main_win_height, /* width = */ width);
 461         /* Allow scrolling */
 462         scrollok (main_win, TRUE);
 463         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 464         /* Allow hardware accelerated scrolling. */
 465         idlok (main_win, TRUE);
 466         wrefresh (main_win);
 467
 468         for (iter = ping_iterator_get (ping);
 469                         iter != NULL;
 470                         iter = ping_iterator_next (iter))
 471         {
 472                 ping_context_t *context;
 473
 474                 context = ping_iterator_get_context (iter);
 475                 if (context == NULL)
 476                         continue;
 477
 478                 if (context->window != NULL)
 479                 {
 480                         delwin (context->window);
 481                         context->window = NULL;
 482                 }
 483                 context->window = newwin (/* height = */ 4,
 484                                 /* width = */ 0,
 485                                 /* y = */ main_win_height + (4 * context->index),
 486                                 /* x = */ 0);
 487         }
 488
 489         return (0);
 490 } /* }}} */
 491
 492 static int check_resize (pingobj_t *ping) /* {{{ */
 493 {
 494         int need_resize = 0;
 495
 496         while (42)
 497         {
 498                 int key = wgetch (stdscr);
 499                 if (key == ERR)
 500                         break;
 501                 else if (key == KEY_RESIZE)
 502                         need_resize = 1;
 503         }
 504
 505         if (need_resize)
 506                 return (on_resize (ping));
 507         else
 508                 return (0);
 509 } /* }}} int check_resize */
 510
 511 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 512 {
 513         pingobj_iter_t *iter;
 514         int width = 0;
 515         int height = 0;
 516         int main_win_height;
 517
 518         initscr ();
 519         cbreak ();
 520         noecho ();
 521         nodelay (stdscr, TRUE);
 522
 523         getmaxyx (stdscr, height, width);
 524         if ((height < 1) || (width < 1))
 525                 return (EINVAL);
 526
 527         if (has_colors () == TRUE)
 528         {
 529                 start_color ();
 530                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 531                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 532                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 533         }
 534
 535         main_win_height = height - (4 * host_num);
 536         main_win = newwin (/* height = */ main_win_height,
 537                         /* width = */ 0,
 538                         /* y = */ 0, /* x = */ 0);
 539         /* Allow scrolling */
 540         scrollok (main_win, TRUE);
 541         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 542         /* Allow hardware accelerated scrolling. */
 543         idlok (main_win, TRUE);
 544         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
 545         wrefresh (main_win);
 546
 547         for (iter = ping_iterator_get (ping);
 548                         iter != NULL;
 549                         iter = ping_iterator_next (iter))
 550         {
 551                 ping_context_t *context;
 552
 553                 context = ping_iterator_get_context (iter);
 554                 if (context == NULL)
 555                         continue;
 556
 557                 if (context->window != NULL)
 558                 {
 559                         delwin (context->window);
 560                         context->window = NULL;
 561                 }
 562                 context->window = newwin (/* height = */ 4,
 563                                 /* width = */ 0,
 564                                 /* y = */ main_win_height + (4 * context->index),
 565                                 /* x = */ 0);
 566         }
 567
 568
 569         /* Don't know what good this does exactly, but without this code
 570          * "check_resize" will be called right after startup and *somehow*
 571          * this leads to display errors. If we purge all initial characters
 572          * here, the problem goes away. "wgetch" is non-blocking due to
 573          * "nodelay" (see above). */
 574         while (wgetch (stdscr) != ERR)
 575         {
 576                 /* eat up characters */;
 577         }
 578
 579         return (0);
 580 } /* }}} int pre_loop_hook */
 581
 582 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
 583 {
 584         return (check_resize (ping));
 585 } /* }}} int pre_sleep_hook */
 586
 587 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
 588 {
 589         return (check_resize (ping));
 590 } /* }}} int pre_sleep_hook */
 591 #else /* if !USE_NCURSES */
 592 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 593 {
 594         pingobj_iter_t *iter;
 595
 596         for (iter = ping_iterator_get (ping);
 597                         iter != NULL;
 598                         iter = ping_iterator_next (iter))
 599         {
 600                 ping_context_t *ctx;
 601                 size_t buffer_size;
 602
 603                 ctx = ping_iterator_get_context (iter);
 604                 if (ctx == NULL)
 605                         continue;
 606
 607                 buffer_size = 0;
 608                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 609
 610                 printf ("PING %s (%s) %zu bytes of data.\n",
 611                                 ctx->host, ctx->addr, buffer_size);
 612         }
 613
 614         return (0);
 615 } /* }}} int pre_loop_hook */
 616
 617 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 618 {
 619         fflush (stdout);
 620
 621         return (0);
 622 } /* }}} int pre_sleep_hook */
 623
 624 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 625 {
 626         return (0);
 627 } /* }}} int post_sleep_hook */
 628 #endif
 629
 630 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
 631                 int index)
 632 {
 633         double          latency;
 634         unsigned int    sequence;
 635         int             recv_ttl;
 636         uint8_t         recv_tos;
 637         size_t          buffer_len;
 638         size_t          data_len;
 639         ping_context_t *context;
 640
 641         latency = -1.0;
 642         buffer_len = sizeof (latency);
 643         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 644                         &latency, &buffer_len);
 645
 646         sequence = 0;
 647         buffer_len = sizeof (sequence);
 648         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 649                         &sequence, &buffer_len);
 650
 651         recv_ttl = -1;
 652         buffer_len = sizeof (recv_ttl);
 653         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 654                         &recv_ttl, &buffer_len);
 655
 656         recv_tos = 0;
 657         buffer_len = sizeof (recv_tos);
 658         ping_iterator_get_info (iter, PING_INFO_RECV_TOS,
 659                         &recv_tos, &buffer_len);
 660
 661         data_len = 0;
 662         ping_iterator_get_info (iter, PING_INFO_DATA,
 663                         NULL, &data_len);
 664
 665         context = (ping_context_t *) ping_iterator_get_context (iter);
 666
 667 #if USE_NCURSES
 668 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
 669 #else
 670 # define HOST_PRINTF(...) printf(__VA_ARGS__)
 671 #endif
 672
 673         context->req_sent++;
 674         if (latency > 0.0)
 675         {
 676                 context->req_rcvd++;
 677                 context->latency_total += latency;
 678                 context->latency_total_square += (latency * latency);
 679
 680                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 681                         context->latency_max = latency;
 682                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 683                         context->latency_min = latency;
 684
 685 #if USE_NCURSES
 686                 if (has_colors () == TRUE)
 687                 {
 688                         int color = OPING_GREEN;
 689                         double average = context_get_average (context);
 690                         double stddev = context_get_stddev (context);
 691
 692                         if ((latency < (average - (2 * stddev)))
 693                                         || (latency > (average + (2 * stddev))))
 694                                 color = OPING_RED;
 695                         else if ((latency < (average - stddev))
 696                                         || (latency > (average + stddev)))
 697                                 color = OPING_YELLOW;
 698
 699                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i tos=0x%02"PRIx8
 700                                         " time=",
 701                                         data_len, context->host, context->addr,
 702                                         sequence, recv_ttl, recv_tos);
 703                         wattron (main_win, COLOR_PAIR(color));
 704                         HOST_PRINTF ("%.2f", latency);
 705                         wattroff (main_win, COLOR_PAIR(color));
 706                         HOST_PRINTF (" ms\n");
 707                 }
 708                 else
 709                 {
 710 #endif
 711                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i tos=0x%02"PRIx8
 712                                 " time=%.2f ms\n",
 713                                 data_len,
 714                                 context->host, context->addr,
 715                                 sequence, recv_ttl, recv_tos, latency);
 716 #if USE_NCURSES
 717                 }
 718 #endif
 719         }
 720         else
 721         {
 722 #if USE_NCURSES
 723                 if (has_colors () == TRUE)
 724                 {
 725                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
 726                                         context->host, context->addr,
 727                                         sequence);
 728                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 729                         HOST_PRINTF ("timeout");
 730                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 731                         HOST_PRINTF ("\n");
 732                 }
 733                 else
 734                 {
 735 #endif
 736                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 737                                 context->host, context->addr,
 738                                 sequence);
 739 #if USE_NCURSES
 740                 }
 741 #endif
 742         }
 743
 744 #if USE_NCURSES
 745         update_stats_from_context (context);
 746         wrefresh (main_win);
 747 #endif
 748 } /* }}} void update_host_hook */
 749
 750 static int post_loop_hook (pingobj_t *ping) /* {{{ */
 751 {
 752         pingobj_iter_t *iter;
 753
 754 #if USE_NCURSES
 755         endwin ();
 756 #endif
 757
 758         for (iter = ping_iterator_get (ping);
 759                         iter != NULL;
 760                         iter = ping_iterator_next (iter))
 761         {
 762                 ping_context_t *context;
 763
 764                 context = ping_iterator_get_context (iter);
 765
 766                 printf ("\n--- %s ping statistics ---\n"
 767                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 768                                 context->host, context->req_sent, context->req_rcvd,
 769                                 context_get_packet_loss (context),
 770                                 context->latency_total);
 771
 772                 if (context->req_rcvd != 0)
 773                 {
 774                         double average;
 775                         double deviation;
 776
 777                         average = context_get_average (context);
 778                         deviation = context_get_stddev (context);
 779
 780                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 781                                         context->latency_min,
 782                                         average,
 783                                         context->latency_max,
 784                                         deviation);
 785                 }
 786
 787                 ping_iterator_set_context (iter, NULL);
 788                 context_destroy (context);
 789         }
 790
 791         return (0);
 792 } /* }}} int post_loop_hook */
 793
 794 int main (int argc, char **argv) /* {{{ */
 795 {
 796         pingobj_t      *ping;
 797         pingobj_iter_t *iter;
 798
 799         struct sigaction sigint_action;
 800
 801         struct timeval  tv_begin;
 802         struct timeval  tv_end;
 803         struct timespec ts_wait;
 804         struct timespec ts_int;
 805
 806         int optind;
 807         int i;
 808         int status;
 809 #if _POSIX_SAVED_IDS
 810         uid_t saved_set_uid;
 811
 812         /* Save the old effective user id */
 813         saved_set_uid = geteuid ();
 814         /* Set the effective user ID to the real user ID without changing the
 815          * saved set-user ID */
 816         status = seteuid (getuid ());
 817         if (status != 0)
 818         {
 819                 fprintf (stderr, "Temporarily dropping privileges "
 820                                 "failed: %s\n", strerror (errno));
 821                 exit (EXIT_FAILURE);
 822         }
 823 #endif
 824
 825         optind = read_options (argc, argv);
 826
 827 #if !_POSIX_SAVED_IDS
 828         /* Cannot temporarily drop privileges -> reject every file but "-". */
 829         if ((opt_filename != NULL)
 830                         && (strcmp ("-", opt_filename) != 0)
 831                         && (getuid () != geteuid ()))
 832         {
 833                 fprintf (stderr, "Your real and effective user IDs don't "
 834                                 "match. Reading from a file (option '-f')\n"
 835                                 "is therefore too risky. You can still read "
 836                                 "from STDIN using '-f -' if you like.\n"
 837                                 "Sorry.\n");
 838                 exit (EXIT_FAILURE);
 839         }
 840 #endif
 841
 842         if ((optind >= argc) && (opt_filename == NULL)) {
 843                 usage_exit (argv[0], 1);
 844         }
 845
 846         if ((ping = ping_construct ()) == NULL)
 847         {
 848                 fprintf (stderr, "ping_construct failed\n");
 849                 return (1);
 850         }
 851
 852         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
 853         {
 854                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
 855                                 opt_send_ttl, ping_get_error (ping));
 856         }
 857
 858         if (ping_setopt (ping, PING_OPT_TOS, &opt_send_tos) != 0)
 859         {
 860                 fprintf (stderr, "Setting TOS to %i failed: %s\n",
 861                                 opt_send_tos, ping_get_error (ping));
 862         }
 863
 864         {
 865                 double temp_sec;
 866                 double temp_nsec;
 867
 868                 temp_nsec = modf (opt_interval, &temp_sec);
 869                 ts_int.tv_sec  = (time_t) temp_sec;
 870                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
 871
 872                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
 873         }
 874
 875         if (opt_addrfamily != PING_DEF_AF)
 876                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
 877
 878         if (opt_srcaddr != NULL)
 879         {
 880                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
 881                 {
 882                         fprintf (stderr, "Setting source address failed: %s\n",
 883                                         ping_get_error (ping));
 884                 }
 885         }
 886
 887         if (opt_device != NULL)
 888         {
 889                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
 890                 {
 891                         fprintf (stderr, "Setting device failed: %s\n",
 892                                         ping_get_error (ping));
 893                 }
 894         }
 895
 896         if (opt_filename != NULL)
 897         {
 898                 FILE *infile;
 899                 char line[256];
 900                 char host[256];
 901
 902                 if (strcmp (opt_filename, "-") == 0)
 903                         /* Open STDIN */
 904                         infile = fdopen(0, "r");
 905                 else
 906                         infile = fopen(opt_filename, "r");
 907
 908                 if (infile == NULL)
 909                 {
 910                         fprintf (stderr, "Opening %s failed: %s\n",
 911                                         (strcmp (opt_filename, "-") == 0)
 912                                         ? "STDIN" : opt_filename,
 913                                         strerror(errno));
 914                         return (1);
 915                 }
 916
 917 #if _POSIX_SAVED_IDS
 918                 /* Regain privileges */
 919                 status = seteuid (saved_set_uid);
 920                 if (status != 0)
 921                 {
 922                         fprintf (stderr, "Temporarily re-gaining privileges "
 923                                         "failed: %s\n", strerror (errno));
 924                         exit (EXIT_FAILURE);
 925                 }
 926 #endif
 927
 928                 while (fgets(line, sizeof(line), infile))
 929                 {
 930                         /* Strip whitespace */
 931                         if (sscanf(line, "%s", host) != 1)
 932                                 continue;
 933
 934                         if ((host[0] == 0) || (host[0] == '#'))
 935                                 continue;
 936
 937                         if (ping_host_add(ping, host) < 0)
 938                         {
 939                                 const char *errmsg = ping_get_error (ping);
 940
 941                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
 942                                 continue;
 943                         }
 944                         else
 945                         {
 946                                 host_num++;
 947                         }
 948                 }
 949
 950 #if _POSIX_SAVED_IDS
 951                 /* Drop privileges */
 952                 status = seteuid (getuid ());
 953                 if (status != 0)
 954                 {
 955                         fprintf (stderr, "Temporarily dropping privileges "
 956                                         "failed: %s\n", strerror (errno));
 957                         exit (EXIT_FAILURE);
 958                 }
 959 #endif
 960
 961                 fclose(infile);
 962         }
 963
 964 #if _POSIX_SAVED_IDS
 965         /* Regain privileges */
 966         status = seteuid (saved_set_uid);
 967         if (status != 0)
 968         {
 969                 fprintf (stderr, "Temporarily re-gaining privileges "
 970                                 "failed: %s\n", strerror (errno));
 971                 exit (EXIT_FAILURE);
 972         }
 973 #endif
 974
 975         for (i = optind; i < argc; i++)
 976         {
 977                 if (ping_host_add (ping, argv[i]) < 0)
 978                 {
 979                         const char *errmsg = ping_get_error (ping);
 980
 981                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
 982                         continue;
 983                 }
 984                 else
 985                 {
 986                         host_num++;
 987                 }
 988         }
 989
 990         /* Permanently drop root privileges if we're setuid-root. */
 991         status = setuid (getuid ());
 992         if (status != 0)
 993         {
 994                 fprintf (stderr, "Dropping privileges failed: %s\n",
 995                                 strerror (errno));
 996                 exit (EXIT_FAILURE);
 997         }
 998
 999 #if _POSIX_SAVED_IDS
1000         saved_set_uid = (uid_t) -1;
1001 #endif
1002
1003         ping_initialize_contexts (ping);
1004
1005         if (i == 0)
1006                 return (1);
1007
1008         memset (&sigint_action, '\0', sizeof (sigint_action));
1009         sigint_action.sa_handler = sigint_handler;
1010         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1011         {
1012                 perror ("sigaction");
1013                 return (1);
1014         }
1015
1016         pre_loop_hook (ping);
1017
1018         while (opt_count != 0)
1019         {
1020                 int index;
1021                 int status;
1022
1023                 if (gettimeofday (&tv_begin, NULL) < 0)
1024                 {
1025                         perror ("gettimeofday");
1026                         return (1);
1027                 }
1028
1029                 if (ping_send (ping) < 0)
1030                 {
1031                         fprintf (stderr, "ping_send failed: %s\n",
1032                                         ping_get_error (ping));
1033                         return (1);
1034                 }
1035
1036                 index = 0;
1037                 for (iter = ping_iterator_get (ping);
1038                                 iter != NULL;
1039                                 iter = ping_iterator_next (iter))
1040                 {
1041                         update_host_hook (iter, index);
1042                         index++;
1043                 }
1044
1045                 pre_sleep_hook (ping);
1046
1047                 /* Don't sleep in the last iteration */
1048                 if (opt_count == 1)
1049                         break;
1050
1051                 if (gettimeofday (&tv_end, NULL) < 0)
1052                 {
1053                         perror ("gettimeofday");
1054                         return (1);
1055                 }
1056
1057                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1058
1059                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1060                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1061                 {
1062                         if (errno != EINTR)
1063                         {
1064                                 perror ("nanosleep");
1065                                 break;
1066                         }
1067                         else if (opt_count == 0)
1068                         {
1069                                 /* sigint */
1070                                 break;
1071                         }
1072                 }
1073
1074                 post_sleep_hook (ping);
1075
1076                 if (opt_count > 0)
1077                         opt_count--;
1078         } /* while (opt_count != 0) */
1079
1080         post_loop_hook (ping);
1081
1082         ping_destroy (ping);
1083
1084         return (0);
1085 } /* }}} int main */
1086
1087 /* vim: set fdm=marker : */