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 #if 1
 444         wresize (main_win, main_win_height, /* width = */ 0);
 445 #else
 446         delwin (main_win);
 447         main_win = newwin (/* height = */ main_win_height,
 448                         /* width = */ 0,
 449                         /* y = */ 0, /* x = */ 0);
 450 #endif
 451         /* Allow scrolling */
 452         scrollok (main_win, TRUE);
 453         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 454         /* Allow hardware accelerated scrolling. */
 455         idlok (main_win, TRUE);
 456         wrefresh (main_win);
 457
 458         for (iter = ping_iterator_get (ping);
 459                         iter != NULL;
 460                         iter = ping_iterator_next (iter))
 461         {
 462                 ping_context_t *context;
 463
 464                 context = ping_iterator_get_context (iter);
 465                 if (context == NULL)
 466                         continue;
 467
 468                 if (context->window != NULL)
 469                 {
 470                         delwin (context->window);
 471                         context->window = NULL;
 472                 }
 473                 context->window = newwin (/* height = */ 4,
 474                                 /* width = */ 0,
 475                                 /* y = */ main_win_height + (4 * context->index),
 476                                 /* x = */ 0);
 477         }
 478
 479         return (0);
 480 } /* }}} */
 481
 482 static int check_resize (pingobj_t *ping) /* {{{ */
 483 {
 484         int need_resize = 0;
 485
 486         while (42)
 487         {
 488                 int key = wgetch (stdscr);
 489                 if (key == ERR)
 490                         break;
 491                 else if (key == KEY_RESIZE)
 492                         need_resize = 1;
 493         }
 494
 495         if (need_resize)
 496                 return (on_resize (ping));
 497         else
 498                 return (0);
 499 } /* }}} int check_resize */
 500
 501 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 502 {
 503         pingobj_iter_t *iter;
 504         int width = 0;
 505         int height = 0;
 506         int main_win_height;
 507
 508         initscr ();
 509         cbreak ();
 510         noecho ();
 511         nodelay (stdscr, TRUE);
 512
 513         getmaxyx (stdscr, height, width);
 514         if ((height < 1) || (width < 1))
 515                 return (EINVAL);
 516
 517         if (has_colors () == TRUE)
 518         {
 519                 start_color ();
 520                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 521                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 522                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 523         }
 524
 525         main_win_height = height - (4 * host_num);
 526         main_win = newwin (/* height = */ main_win_height,
 527                         /* width = */ 0,
 528                         /* y = */ 0, /* x = */ 0);
 529         /* Allow scrolling */
 530         scrollok (main_win, TRUE);
 531         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 532         /* Allow hardware accelerated scrolling. */
 533         idlok (main_win, TRUE);
 534         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
 535         wrefresh (main_win);
 536
 537         for (iter = ping_iterator_get (ping);
 538                         iter != NULL;
 539                         iter = ping_iterator_next (iter))
 540         {
 541                 ping_context_t *context;
 542
 543                 context = ping_iterator_get_context (iter);
 544                 if (context == NULL)
 545                         continue;
 546
 547                 if (context->window != NULL)
 548                 {
 549                         delwin (context->window);
 550                         context->window = NULL;
 551                 }
 552                 context->window = newwin (/* height = */ 4,
 553                                 /* width = */ 0,
 554                                 /* y = */ main_win_height + (4 * context->index),
 555                                 /* x = */ 0);
 556         }
 557
 558
 559         /* Don't know what good this does exactly, but without this code
 560          * "check_resize" will be called right after startup and *somehow*
 561          * this leads to display errors. If we purge all initial characters
 562          * here, the problem goes away. "wgetch" is non-blocking due to
 563          * "nodelay" (see above). */
 564         while (wgetch (stdscr) != ERR)
 565         {
 566                 /* eat up characters */;
 567         }
 568
 569         return (0);
 570 } /* }}} int pre_loop_hook */
 571
 572 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
 573 {
 574         return (check_resize (ping));
 575 } /* }}} int pre_sleep_hook */
 576
 577 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
 578 {
 579         return (check_resize (ping));
 580 } /* }}} int pre_sleep_hook */
 581 #else /* if !USE_NCURSES */
 582 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 583 {
 584         pingobj_iter_t *iter;
 585
 586         for (iter = ping_iterator_get (ping);
 587                         iter != NULL;
 588                         iter = ping_iterator_next (iter))
 589         {
 590                 ping_context_t *ctx;
 591                 size_t buffer_size;
 592
 593                 ctx = ping_iterator_get_context (iter);
 594                 if (ctx == NULL)
 595                         continue;
 596
 597                 buffer_size = 0;
 598                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 599
 600                 printf ("PING %s (%s) %zu bytes of data.\n",
 601                                 ctx->host, ctx->addr, buffer_size);
 602         }
 603
 604         return (0);
 605 } /* }}} int pre_loop_hook */
 606
 607 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 608 {
 609         fflush (stdout);
 610
 611         return (0);
 612 } /* }}} int pre_sleep_hook */
 613
 614 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 615 {
 616         return (0);
 617 } /* }}} int post_sleep_hook */
 618 #endif
 619
 620 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
 621                 int index)
 622 {
 623         double          latency;
 624         unsigned int    sequence;
 625         int             recv_ttl;
 626         size_t          buffer_len;
 627         size_t          data_len;
 628         ping_context_t *context;
 629
 630         latency = -1.0;
 631         buffer_len = sizeof (latency);
 632         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 633                         &latency, &buffer_len);
 634
 635         sequence = 0;
 636         buffer_len = sizeof (sequence);
 637         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 638                         &sequence, &buffer_len);
 639
 640         recv_ttl = -1;
 641         buffer_len = sizeof (recv_ttl);
 642         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 643                         &recv_ttl, &buffer_len);
 644
 645         data_len = 0;
 646         ping_iterator_get_info (iter, PING_INFO_DATA,
 647                         NULL, &data_len);
 648
 649         context = (ping_context_t *) ping_iterator_get_context (iter);
 650
 651 #if USE_NCURSES
 652 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
 653 #else
 654 # define HOST_PRINTF(...) printf(__VA_ARGS__)
 655 #endif
 656
 657         context->req_sent++;
 658         if (latency > 0.0)
 659         {
 660                 context->req_rcvd++;
 661                 context->latency_total += latency;
 662                 context->latency_total_square += (latency * latency);
 663
 664                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 665                         context->latency_max = latency;
 666                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 667                         context->latency_min = latency;
 668
 669 #if USE_NCURSES
 670                 if (has_colors () == TRUE)
 671                 {
 672                         int color = OPING_GREEN;
 673                         double average = context_get_average (context);
 674                         double stddev = context_get_stddev (context);
 675
 676                         if ((latency < (average - (2 * stddev)))
 677                                         || (latency > (average + (2 * stddev))))
 678                                 color = OPING_RED;
 679                         else if ((latency < (average - stddev))
 680                                         || (latency > (average + stddev)))
 681                                 color = OPING_YELLOW;
 682
 683                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i "
 684                                         "time=",
 685                                         data_len, context->host, context->addr,
 686                                         sequence, recv_ttl);
 687                         wattron (main_win, COLOR_PAIR(color));
 688                         HOST_PRINTF ("%.2f", latency);
 689                         wattroff (main_win, COLOR_PAIR(color));
 690                         HOST_PRINTF (" ms\n");
 691                 }
 692                 else
 693                 {
 694 #endif
 695                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i "
 696                                 "time=%.2f ms\n",
 697                                 data_len,
 698                                 context->host, context->addr,
 699                                 sequence, recv_ttl, latency);
 700 #if USE_NCURSES
 701                 }
 702 #endif
 703         }
 704         else
 705         {
 706 #if USE_NCURSES
 707                 if (has_colors () == TRUE)
 708                 {
 709                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
 710                                         context->host, context->addr,
 711                                         sequence);
 712                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 713                         HOST_PRINTF ("timeout");
 714                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 715                         HOST_PRINTF ("\n");
 716                 }
 717                 else
 718                 {
 719 #endif
 720                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 721                                 context->host, context->addr,
 722                                 sequence);
 723 #if USE_NCURSES
 724                 }
 725 #endif
 726         }
 727
 728 #if USE_NCURSES
 729         update_stats_from_context (context);
 730         wrefresh (main_win);
 731 #endif
 732 } /* }}} void update_host_hook */
 733
 734 static int post_loop_hook (pingobj_t *ping) /* {{{ */
 735 {
 736         pingobj_iter_t *iter;
 737
 738 #if USE_NCURSES
 739         endwin ();
 740 #endif
 741
 742         for (iter = ping_iterator_get (ping);
 743                         iter != NULL;
 744                         iter = ping_iterator_next (iter))
 745         {
 746                 ping_context_t *context;
 747
 748                 context = ping_iterator_get_context (iter);
 749
 750                 printf ("\n--- %s ping statistics ---\n"
 751                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 752                                 context->host, context->req_sent, context->req_rcvd,
 753                                 context_get_packet_loss (context),
 754                                 context->latency_total);
 755
 756                 if (context->req_rcvd != 0)
 757                 {
 758                         double average;
 759                         double deviation;
 760
 761                         average = context_get_average (context);
 762                         deviation = context_get_stddev (context);
 763
 764                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 765                                         context->latency_min,
 766                                         average,
 767                                         context->latency_max,
 768                                         deviation);
 769                 }
 770
 771                 ping_iterator_set_context (iter, NULL);
 772                 context_destroy (context);
 773         }
 774
 775         return (0);
 776 } /* }}} int post_loop_hook */
 777
 778 int main (int argc, char **argv) /* {{{ */
 779 {
 780         pingobj_t      *ping;
 781         pingobj_iter_t *iter;
 782
 783         struct sigaction sigint_action;
 784
 785         struct timeval  tv_begin;
 786         struct timeval  tv_end;
 787         struct timespec ts_wait;
 788         struct timespec ts_int;
 789
 790         int optind;
 791         int i;
 792         int status;
 793 #if _POSIX_SAVED_IDS
 794         uid_t saved_set_uid;
 795
 796         /* Save the old effective user id */
 797         saved_set_uid = geteuid ();
 798         /* Set the effective user ID to the real user ID without changing the
 799          * saved set-user ID */
 800         status = seteuid (getuid ());
 801         if (status != 0)
 802         {
 803                 fprintf (stderr, "Temporarily dropping privileges "
 804                                 "failed: %s\n", strerror (errno));
 805                 exit (EXIT_FAILURE);
 806         }
 807 #endif
 808
 809         optind = read_options (argc, argv);
 810
 811 #if !_POSIX_SAVED_IDS
 812         /* Cannot temporarily drop privileges -> reject every file but "-". */
 813         if ((opt_filename != NULL)
 814                         && (strcmp ("-", opt_filename) != 0)
 815                         && (getuid () != geteuid ()))
 816         {
 817                 fprintf (stderr, "Your real and effective user IDs don't "
 818                                 "match. Reading from a file (option '-f')\n"
 819                                 "is therefore too risky. You can still read "
 820                                 "from STDIN using '-f -' if you like.\n"
 821                                 "Sorry.\n");
 822                 exit (EXIT_FAILURE);
 823         }
 824 #endif
 825
 826         if ((optind >= argc) && (opt_filename == NULL)) {
 827                 usage_exit (argv[0], 1);
 828         }
 829
 830         if ((ping = ping_construct ()) == NULL)
 831         {
 832                 fprintf (stderr, "ping_construct failed\n");
 833                 return (1);
 834         }
 835
 836         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
 837         {
 838                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
 839                                 opt_send_ttl, ping_get_error (ping));
 840         }
 841
 842         {
 843                 double temp_sec;
 844                 double temp_nsec;
 845
 846                 temp_nsec = modf (opt_interval, &temp_sec);
 847                 ts_int.tv_sec  = (time_t) temp_sec;
 848                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
 849
 850                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
 851         }
 852
 853         if (opt_addrfamily != PING_DEF_AF)
 854                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
 855
 856         if (opt_srcaddr != NULL)
 857         {
 858                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
 859                 {
 860                         fprintf (stderr, "Setting source address failed: %s\n",
 861                                         ping_get_error (ping));
 862                 }
 863         }
 864
 865         if (opt_device != NULL)
 866         {
 867                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
 868                 {
 869                         fprintf (stderr, "Setting device failed: %s\n",
 870                                         ping_get_error (ping));
 871                 }
 872         }
 873
 874         if (opt_filename != NULL)
 875         {
 876                 FILE *infile;
 877                 char line[256];
 878                 char host[256];
 879
 880                 if (strcmp (opt_filename, "-") == 0)
 881                         /* Open STDIN */
 882                         infile = fdopen(0, "r");
 883                 else
 884                         infile = fopen(opt_filename, "r");
 885
 886                 if (infile == NULL)
 887                 {
 888                         fprintf (stderr, "Opening %s failed: %s\n",
 889                                         (strcmp (opt_filename, "-") == 0)
 890                                         ? "STDIN" : opt_filename,
 891                                         strerror(errno));
 892                         return (1);
 893                 }
 894
 895 #if _POSIX_SAVED_IDS
 896                 /* Regain privileges */
 897                 status = seteuid (saved_set_uid);
 898                 if (status != 0)
 899                 {
 900                         fprintf (stderr, "Temporarily re-gaining privileges "
 901                                         "failed: %s\n", strerror (errno));
 902                         exit (EXIT_FAILURE);
 903                 }
 904 #endif
 905
 906                 while (fgets(line, sizeof(line), infile))
 907                 {
 908                         /* Strip whitespace */
 909                         if (sscanf(line, "%s", host) != 1)
 910                                 continue;
 911
 912                         if ((host[0] == 0) || (host[0] == '#'))
 913                                 continue;
 914
 915                         if (ping_host_add(ping, host) < 0)
 916                         {
 917                                 const char *errmsg = ping_get_error (ping);
 918
 919                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
 920                                 continue;
 921                         }
 922                         else
 923                         {
 924                                 host_num++;
 925                         }
 926                 }
 927
 928 #if _POSIX_SAVED_IDS
 929                 /* Drop privileges */
 930                 status = seteuid (getuid ());
 931                 if (status != 0)
 932                 {
 933                         fprintf (stderr, "Temporarily dropping privileges "
 934                                         "failed: %s\n", strerror (errno));
 935                         exit (EXIT_FAILURE);
 936                 }
 937 #endif
 938
 939                 fclose(infile);
 940         }
 941
 942 #if _POSIX_SAVED_IDS
 943         /* Regain privileges */
 944         status = seteuid (saved_set_uid);
 945         if (status != 0)
 946         {
 947                 fprintf (stderr, "Temporarily re-gaining privileges "
 948                                 "failed: %s\n", strerror (errno));
 949                 exit (EXIT_FAILURE);
 950         }
 951 #endif
 952
 953         for (i = optind; i < argc; i++)
 954         {
 955                 if (ping_host_add (ping, argv[i]) < 0)
 956                 {
 957                         const char *errmsg = ping_get_error (ping);
 958
 959                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
 960                         continue;
 961                 }
 962                 else
 963                 {
 964                         host_num++;
 965                 }
 966         }
 967
 968         /* Permanently drop root privileges if we're setuid-root. */
 969         status = setuid (getuid ());
 970         if (status != 0)
 971         {
 972                 fprintf (stderr, "Dropping privileges failed: %s\n",
 973                                 strerror (errno));
 974                 exit (EXIT_FAILURE);
 975         }
 976
 977 #if _POSIX_SAVED_IDS
 978         saved_set_uid = (uid_t) -1;
 979 #endif
 980
 981         ping_initialize_contexts (ping);
 982
 983         if (i == 0)
 984                 return (1);
 985
 986         memset (&sigint_action, '\0', sizeof (sigint_action));
 987         sigint_action.sa_handler = sigint_handler;
 988         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
 989         {
 990                 perror ("sigaction");
 991                 return (1);
 992         }
 993
 994         pre_loop_hook (ping);
 995
 996         while (opt_count != 0)
 997         {
 998                 int index;
 999                 int status;
1000
1001                 if (gettimeofday (&tv_begin, NULL) < 0)
1002                 {
1003                         perror ("gettimeofday");
1004                         return (1);
1005                 }
1006
1007                 if (ping_send (ping) < 0)
1008                 {
1009                         fprintf (stderr, "ping_send failed: %s\n",
1010                                         ping_get_error (ping));
1011                         return (1);
1012                 }
1013
1014                 index = 0;
1015                 for (iter = ping_iterator_get (ping);
1016                                 iter != NULL;
1017                                 iter = ping_iterator_next (iter))
1018                 {
1019                         update_host_hook (iter, index);
1020                         index++;
1021                 }
1022
1023                 pre_sleep_hook (ping);
1024
1025                 /* Don't sleep in the last iteration */
1026                 if (opt_count == 1)
1027                         break;
1028
1029                 if (gettimeofday (&tv_end, NULL) < 0)
1030                 {
1031                         perror ("gettimeofday");
1032                         return (1);
1033                 }
1034
1035                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1036
1037                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1038                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1039                 {
1040                         if (errno != EINTR)
1041                         {
1042                                 perror ("nanosleep");
1043                                 break;
1044                         }
1045                         else if (opt_count == 0)
1046                         {
1047                                 /* sigint */
1048                                 break;
1049                         }
1050                 }
1051
1052                 post_sleep_hook (ping);
1053
1054                 if (opt_count > 0)
1055                         opt_count--;
1056         } /* while (opt_count != 0) */
1057
1058         post_loop_hook (ping);
1059
1060         ping_destroy (ping);
1061
1062         return (0);
1063 } /* }}} int main */
1064
1065 /* vim: set fdm=marker : */