src/oping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006-2010  Florian octo Forster <octo at verplant.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; only version 2 of the License is
   8  * applicable.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18  */
  19
  20 #if HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #if STDC_HEADERS
  25 # include <stdlib.h>
  26 # include <stdio.h>
  27 # include <string.h>
  28 # include <errno.h>
  29 # include <assert.h>
  30 #else
  31 # error "You don't have the standard C99 header files installed"
  32 #endif /* STDC_HEADERS */
  33
  34 #if HAVE_UNISTD_H
  35 # include <unistd.h>
  36 #endif
  37
  38 #if HAVE_MATH_H
  39 # include <math.h>
  40 #endif
  41
  42 #if TIME_WITH_SYS_TIME
  43 # include <sys/time.h>
  44 # include <time.h>
  45 #else
  46 # if HAVE_SYS_TIME_H
  47 #  include <sys/time.h>
  48 # else
  49 #  include <time.h>
  50 # endif
  51 #endif
  52
  53 #if HAVE_NETDB_H
  54 # include <netdb.h> /* NI_MAXHOST */
  55 #endif
  56
  57 #if HAVE_SIGNAL_H
  58 # include <signal.h>
  59 #endif
  60
  61 #if HAVE_SYS_TYPES_H
  62 #include <sys/types.h>
  63 #endif
  64
  65 #if USE_NCURSES
  66 # define NCURSES_OPAQUE 1
  67 # include <ncurses.h>
  68
  69 # define OPING_GREEN 1
  70 # define OPING_YELLOW 2
  71 # define OPING_RED 3
  72 #endif
  73
  74 #include "oping.h"
  75
  76 #ifndef _POSIX_SAVED_IDS
  77 # define _POSIX_SAVED_IDS 0
  78 #endif
  79
  80 typedef struct ping_context
  81 {
  82         char host[NI_MAXHOST];
  83         char addr[NI_MAXHOST];
  84
  85         int index;
  86         int req_sent;
  87         int req_rcvd;
  88
  89         double latency_min;
  90         double latency_max;
  91         double latency_total;
  92         double latency_total_square;
  93
  94 #if USE_NCURSES
  95         WINDOW *window;
  96 #endif
  97 } ping_context_t;
  98
  99 static double  opt_interval   = 1.0;
 100 static int     opt_addrfamily = PING_DEF_AF;
 101 static char   *opt_srcaddr    = NULL;
 102 static char   *opt_device     = NULL;
 103 static char   *opt_filename   = NULL;
 104 static int     opt_count      = -1;
 105 static int     opt_send_ttl   = 64;
 106
 107 static int host_num = 0;
 108
 109 #if USE_NCURSES
 110 static WINDOW *main_win = NULL;
 111 #endif
 112
 113 static void sigint_handler (int signal) /* {{{ */
 114 {
 115         /* Make compiler happy */
 116         signal = 0;
 117         /* Exit the loop */
 118         opt_count = 0;
 119 } /* }}} void sigint_handler */
 120
 121 static ping_context_t *context_create (void) /* {{{ */
 122 {
 123         ping_context_t *ret;
 124
 125         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 126                 return (NULL);
 127
 128         memset (ret, '\0', sizeof (ping_context_t));
 129
 130         ret->latency_min   = -1.0;
 131         ret->latency_max   = -1.0;
 132         ret->latency_total = 0.0;
 133         ret->latency_total_square = 0.0;
 134
 135 #if USE_NCURSES
 136         ret->window = NULL;
 137 #endif
 138
 139         return (ret);
 140 } /* }}} ping_context_t *context_create */
 141
 142 static void context_destroy (ping_context_t *context) /* {{{ */
 143 {
 144         if (context == NULL)
 145                 return;
 146
 147 #if USE_NCURSES
 148         if (context->window != NULL)
 149         {
 150                 delwin (context->window);
 151                 context->window = NULL;
 152         }
 153 #endif
 154
 155         free (context);
 156 } /* }}} void context_destroy */
 157
 158 static double context_get_average (ping_context_t *ctx) /* {{{ */
 159 {
 160         double num_total;
 161
 162         if (ctx == NULL)
 163                 return (-1.0);
 164
 165         if (ctx->req_rcvd < 1)
 166                 return (-0.0);
 167
 168         num_total = (double) ctx->req_rcvd;
 169         return (ctx->latency_total / num_total);
 170 } /* }}} double context_get_average */
 171
 172 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 173 {
 174         double num_total;
 175
 176         if (ctx == NULL)
 177                 return (-1.0);
 178
 179         if (ctx->req_rcvd < 1)
 180                 return (-0.0);
 181         else if (ctx->req_rcvd < 2)
 182                 return (0.0);
 183
 184         num_total = (double) ctx->req_rcvd;
 185         return (sqrt (((num_total * ctx->latency_total_square)
 186                                         - (ctx->latency_total * ctx->latency_total))
 187                                 / (num_total * (num_total - 1.0))));
 188 } /* }}} double context_get_stddev */
 189
 190 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 191 {
 192         if (ctx == NULL)
 193                 return (-1.0);
 194
 195         if (ctx->req_sent < 1)
 196                 return (0.0);
 197
 198         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 199                         / ((double) ctx->req_sent));
 200 } /* }}} double context_get_packet_loss */
 201
 202 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 203 {
 204         pingobj_iter_t *iter;
 205         int index;
 206
 207         if (ping == NULL)
 208                 return (EINVAL);
 209
 210         index = 0;
 211         for (iter = ping_iterator_get (ping);
 212                         iter != NULL;
 213                         iter = ping_iterator_next (iter))
 214         {
 215                 ping_context_t *context;
 216                 size_t buffer_size;
 217
 218                 context = context_create ();
 219                 context->index = index;
 220
 221                 buffer_size = sizeof (context->host);
 222                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 223
 224                 buffer_size = sizeof (context->addr);
 225                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 226
 227                 ping_iterator_set_context (iter, (void *) context);
 228
 229                 index++;
 230         }
 231
 232         return (0);
 233 } /* }}} int ping_initialize_contexts */
 234
 235 static void usage_exit (const char *name, int status) /* {{{ */
 236 {
 237         int name_length;
 238
 239         name_length = (int) strlen (name);
 240
 241         fprintf (stderr, "Usage: %s [OPTIONS] "
 242                                 "-f filename | host [host [host ...]]\n"
 243
 244                         "\nAvailable options:\n"
 245                         "  -4|-6        force the use of IPv4 or IPv6\n"
 246                         "  -c count     number of ICMP packets to send\n"
 247                         "  -i interval  interval with which to send ICMP packets\n"
 248                         "  -t ttl       time to live for each ICMP packet\n"
 249                         "  -I srcaddr   source address\n"
 250                         "  -D device    outgoing interface name\n"
 251                         "  -f filename  filename to read hosts from\n"
 252
 253                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 254                         "by Florian octo Forster <octo@verplant.org>\n"
 255                         "for contributions see `AUTHORS'\n",
 256                         name);
 257         exit (status);
 258 } /* }}} void usage_exit */
 259
 260 static int read_options (int argc, char **argv) /* {{{ */
 261 {
 262         int optchar;
 263
 264         while (1)
 265         {
 266                 optchar = getopt (argc, argv, "46c:hi:I:t:f:D:");
 267
 268                 if (optchar == -1)
 269                         break;
 270
 271                 switch (optchar)
 272                 {
 273                         case '4':
 274                         case '6':
 275                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 276                                 break;
 277
 278                         case 'c':
 279                                 {
 280                                         int new_count;
 281                                         new_count = atoi (optarg);
 282                                         if (new_count > 0)
 283                                                 opt_count = new_count;
 284                                         else
 285                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 286                                                                 optarg);
 287                                 }
 288                                 break;
 289
 290                         case 'f':
 291                                 {
 292                                         if (opt_filename != NULL)
 293                                                 free (opt_filename);
 294                                         opt_filename = strdup (optarg);
 295                                 }
 296                                 break;
 297
 298                         case 'i':
 299                                 {
 300                                         double new_interval;
 301                                         new_interval = atof (optarg);
 302                                         if (new_interval < 0.001)
 303                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 304                                                                 optarg);
 305                                         else
 306                                                 opt_interval = new_interval;
 307                                 }
 308                                 break;
 309                         case 'I':
 310                                 {
 311                                         if (opt_srcaddr != NULL)
 312                                                 free (opt_srcaddr);
 313                                         opt_srcaddr = strdup (optarg);
 314                                 }
 315                                 break;
 316
 317                         case 'D':
 318                                 opt_device = optarg;
 319                                 break;
 320
 321                         case 't':
 322                         {
 323                                 int new_send_ttl;
 324                                 new_send_ttl = atoi (optarg);
 325                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 326                                         opt_send_ttl = new_send_ttl;
 327                                 else
 328                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 329                                                         optarg);
 330                                 break;
 331                         }
 332
 333                         case 'h':
 334                                 usage_exit (argv[0], 0);
 335                                 break;
 336                         default:
 337                                 usage_exit (argv[0], 1);
 338                 }
 339         }
 340
 341         return (optind);
 342 } /* }}} read_options */
 343
 344 static void time_normalize (struct timespec *ts) /* {{{ */
 345 {
 346         while (ts->tv_nsec < 0)
 347         {
 348                 if (ts->tv_sec == 0)
 349                 {
 350                         ts->tv_nsec = 0;
 351                         return;
 352                 }
 353
 354                 ts->tv_sec  -= 1;
 355                 ts->tv_nsec += 1000000000;
 356         }
 357
 358         while (ts->tv_nsec >= 1000000000)
 359         {
 360                 ts->tv_sec  += 1;
 361                 ts->tv_nsec -= 1000000000;
 362         }
 363 } /* }}} void time_normalize */
 364
 365 static void time_calc (struct timespec *ts_dest, /* {{{ */
 366                 const struct timespec *ts_int,
 367                 const struct timeval  *tv_begin,
 368                 const struct timeval  *tv_end)
 369 {
 370         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 371         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 372         time_normalize (ts_dest);
 373
 374         /* Assure that `(begin + interval) > end'.
 375          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 376          * which may be `unsigned. *sigh* */
 377         if ((tv_end->tv_sec > ts_dest->tv_sec)
 378                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 379                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 380         {
 381                 ts_dest->tv_sec  = 0;
 382                 ts_dest->tv_nsec = 0;
 383                 return;
 384         }
 385
 386         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 387         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 388         time_normalize (ts_dest);
 389 } /* }}} void time_calc */
 390
 391 #if USE_NCURSES
 392 static int update_stats_from_context (ping_context_t *ctx) /* {{{ */
 393 {
 394         if ((ctx == NULL) || (ctx->window == NULL))
 395                 return (EINVAL);
 396
 397         werase (ctx->window);
 398
 399         box (ctx->window, 0, 0);
 400         wattron (ctx->window, A_BOLD);
 401         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 402                         " %s ", ctx->host);
 403         wattroff (ctx->window, A_BOLD);
 404         wprintw (ctx->window, "ping statistics ");
 405         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 406                         "%i packets transmitted, %i received, %.2f%% packet "
 407                         "loss, time %.1fms",
 408                         ctx->req_sent, ctx->req_rcvd,
 409                         context_get_packet_loss (ctx),
 410                         ctx->latency_total);
 411         if (ctx->req_rcvd != 0)
 412         {
 413                 double average;
 414                 double deviation;
 415
 416                 average = context_get_average (ctx);
 417                 deviation = context_get_stddev (ctx);
 418
 419                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 420                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 421                                 ctx->latency_min,
 422                                 average,
 423                                 ctx->latency_max,
 424                                 deviation);
 425         }
 426
 427         wrefresh (ctx->window);
 428
 429         return (0);
 430 } /* }}} int update_stats_from_context */
 431
 432 static int on_resize (pingobj_t *ping) /* {{{ */
 433 {
 434         pingobj_iter_t *iter;
 435         int width = 0;
 436         int height = 0;
 437         int main_win_height;
 438
 439         getmaxyx (stdscr, height, width);
 440         if ((height < 1) || (width < 1))
 441                 return (EINVAL);
 442
 443         main_win_height = height - (4 * host_num);
 444         wresize (main_win, main_win_height, /* width = */ width);
 445         /* Allow scrolling */
 446         scrollok (main_win, TRUE);
 447         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 448         /* Allow hardware accelerated scrolling. */
 449         idlok (main_win, TRUE);
 450         wrefresh (main_win);
 451
 452         for (iter = ping_iterator_get (ping);
 453                         iter != NULL;
 454                         iter = ping_iterator_next (iter))
 455         {
 456                 ping_context_t *context;
 457
 458                 context = ping_iterator_get_context (iter);
 459                 if (context == NULL)
 460                         continue;
 461
 462                 if (context->window != NULL)
 463                 {
 464                         delwin (context->window);
 465                         context->window = NULL;
 466                 }
 467                 context->window = newwin (/* height = */ 4,
 468                                 /* width = */ 0,
 469                                 /* y = */ main_win_height + (4 * context->index),
 470                                 /* x = */ 0);
 471         }
 472
 473         return (0);
 474 } /* }}} */
 475
 476 static int check_resize (pingobj_t *ping) /* {{{ */
 477 {
 478         int need_resize = 0;
 479
 480         while (42)
 481         {
 482                 int key = wgetch (stdscr);
 483                 if (key == ERR)
 484                         break;
 485                 else if (key == KEY_RESIZE)
 486                         need_resize = 1;
 487         }
 488
 489         if (need_resize)
 490                 return (on_resize (ping));
 491         else
 492                 return (0);
 493 } /* }}} int check_resize */
 494
 495 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 496 {
 497         pingobj_iter_t *iter;
 498         int width = 0;
 499         int height = 0;
 500         int main_win_height;
 501
 502         initscr ();
 503         cbreak ();
 504         noecho ();
 505         nodelay (stdscr, TRUE);
 506
 507         getmaxyx (stdscr, height, width);
 508         if ((height < 1) || (width < 1))
 509                 return (EINVAL);
 510
 511         if (has_colors () == TRUE)
 512         {
 513                 start_color ();
 514                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 515                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 516                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 517         }
 518
 519         main_win_height = height - (4 * host_num);
 520         main_win = newwin (/* height = */ main_win_height,
 521                         /* width = */ 0,
 522                         /* y = */ 0, /* x = */ 0);
 523         /* Allow scrolling */
 524         scrollok (main_win, TRUE);
 525         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 526         /* Allow hardware accelerated scrolling. */
 527         idlok (main_win, TRUE);
 528         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
 529         wrefresh (main_win);
 530
 531         for (iter = ping_iterator_get (ping);
 532                         iter != NULL;
 533                         iter = ping_iterator_next (iter))
 534         {
 535                 ping_context_t *context;
 536
 537                 context = ping_iterator_get_context (iter);
 538                 if (context == NULL)
 539                         continue;
 540
 541                 if (context->window != NULL)
 542                 {
 543                         delwin (context->window);
 544                         context->window = NULL;
 545                 }
 546                 context->window = newwin (/* height = */ 4,
 547                                 /* width = */ 0,
 548                                 /* y = */ main_win_height + (4 * context->index),
 549                                 /* x = */ 0);
 550         }
 551
 552
 553         /* Don't know what good this does exactly, but without this code
 554          * "check_resize" will be called right after startup and *somehow*
 555          * this leads to display errors. If we purge all initial characters
 556          * here, the problem goes away. "wgetch" is non-blocking due to
 557          * "nodelay" (see above). */
 558         while (wgetch (stdscr) != ERR)
 559         {
 560                 /* eat up characters */;
 561         }
 562
 563         return (0);
 564 } /* }}} int pre_loop_hook */
 565
 566 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
 567 {
 568         return (check_resize (ping));
 569 } /* }}} int pre_sleep_hook */
 570
 571 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
 572 {
 573         return (check_resize (ping));
 574 } /* }}} int pre_sleep_hook */
 575 #else /* if !USE_NCURSES */
 576 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 577 {
 578         pingobj_iter_t *iter;
 579
 580         for (iter = ping_iterator_get (ping);
 581                         iter != NULL;
 582                         iter = ping_iterator_next (iter))
 583         {
 584                 ping_context_t *ctx;
 585                 size_t buffer_size;
 586
 587                 ctx = ping_iterator_get_context (iter);
 588                 if (ctx == NULL)
 589                         continue;
 590
 591                 buffer_size = 0;
 592                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 593
 594                 printf ("PING %s (%s) %zu bytes of data.\n",
 595                                 ctx->host, ctx->addr, buffer_size);
 596         }
 597
 598         return (0);
 599 } /* }}} int pre_loop_hook */
 600
 601 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 602 {
 603         fflush (stdout);
 604
 605         return (0);
 606 } /* }}} int pre_sleep_hook */
 607
 608 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 609 {
 610         return (0);
 611 } /* }}} int post_sleep_hook */
 612 #endif
 613
 614 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
 615                 int index)
 616 {
 617         double          latency;
 618         unsigned int    sequence;
 619         int             recv_ttl;
 620         size_t          buffer_len;
 621         size_t          data_len;
 622         ping_context_t *context;
 623
 624         latency = -1.0;
 625         buffer_len = sizeof (latency);
 626         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 627                         &latency, &buffer_len);
 628
 629         sequence = 0;
 630         buffer_len = sizeof (sequence);
 631         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 632                         &sequence, &buffer_len);
 633
 634         recv_ttl = -1;
 635         buffer_len = sizeof (recv_ttl);
 636         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 637                         &recv_ttl, &buffer_len);
 638
 639         data_len = 0;
 640         ping_iterator_get_info (iter, PING_INFO_DATA,
 641                         NULL, &data_len);
 642
 643         context = (ping_context_t *) ping_iterator_get_context (iter);
 644
 645 #if USE_NCURSES
 646 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
 647 #else
 648 # define HOST_PRINTF(...) printf(__VA_ARGS__)
 649 #endif
 650
 651         context->req_sent++;
 652         if (latency > 0.0)
 653         {
 654                 context->req_rcvd++;
 655                 context->latency_total += latency;
 656                 context->latency_total_square += (latency * latency);
 657
 658                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 659                         context->latency_max = latency;
 660                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 661                         context->latency_min = latency;
 662
 663 #if USE_NCURSES
 664                 if (has_colors () == TRUE)
 665                 {
 666                         int color = OPING_GREEN;
 667                         double average = context_get_average (context);
 668                         double stddev = context_get_stddev (context);
 669
 670                         if ((latency < (average - (2 * stddev)))
 671                                         || (latency > (average + (2 * stddev))))
 672                                 color = OPING_RED;
 673                         else if ((latency < (average - stddev))
 674                                         || (latency > (average + stddev)))
 675                                 color = OPING_YELLOW;
 676
 677                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i "
 678                                         "time=",
 679                                         data_len, context->host, context->addr,
 680                                         sequence, recv_ttl);
 681                         wattron (main_win, COLOR_PAIR(color));
 682                         HOST_PRINTF ("%.2f", latency);
 683                         wattroff (main_win, COLOR_PAIR(color));
 684                         HOST_PRINTF (" ms\n");
 685                 }
 686                 else
 687                 {
 688 #endif
 689                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i "
 690                                 "time=%.2f ms\n",
 691                                 data_len,
 692                                 context->host, context->addr,
 693                                 sequence, recv_ttl, latency);
 694 #if USE_NCURSES
 695                 }
 696 #endif
 697         }
 698         else
 699         {
 700 #if USE_NCURSES
 701                 if (has_colors () == TRUE)
 702                 {
 703                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
 704                                         context->host, context->addr,
 705                                         sequence);
 706                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 707                         HOST_PRINTF ("timeout");
 708                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 709                         HOST_PRINTF ("\n");
 710                 }
 711                 else
 712                 {
 713 #endif
 714                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 715                                 context->host, context->addr,
 716                                 sequence);
 717 #if USE_NCURSES
 718                 }
 719 #endif
 720         }
 721
 722 #if USE_NCURSES
 723         update_stats_from_context (context);
 724         wrefresh (main_win);
 725 #endif
 726 } /* }}} void update_host_hook */
 727
 728 static int post_loop_hook (pingobj_t *ping) /* {{{ */
 729 {
 730         pingobj_iter_t *iter;
 731
 732 #if USE_NCURSES
 733         endwin ();
 734 #endif
 735
 736         for (iter = ping_iterator_get (ping);
 737                         iter != NULL;
 738                         iter = ping_iterator_next (iter))
 739         {
 740                 ping_context_t *context;
 741
 742                 context = ping_iterator_get_context (iter);
 743
 744                 printf ("\n--- %s ping statistics ---\n"
 745                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 746                                 context->host, context->req_sent, context->req_rcvd,
 747                                 context_get_packet_loss (context),
 748                                 context->latency_total);
 749
 750                 if (context->req_rcvd != 0)
 751                 {
 752                         double average;
 753                         double deviation;
 754
 755                         average = context_get_average (context);
 756                         deviation = context_get_stddev (context);
 757
 758                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 759                                         context->latency_min,
 760                                         average,
 761                                         context->latency_max,
 762                                         deviation);
 763                 }
 764
 765                 ping_iterator_set_context (iter, NULL);
 766                 context_destroy (context);
 767         }
 768
 769         return (0);
 770 } /* }}} int post_loop_hook */
 771
 772 int main (int argc, char **argv) /* {{{ */
 773 {
 774         pingobj_t      *ping;
 775         pingobj_iter_t *iter;
 776
 777         struct sigaction sigint_action;
 778
 779         struct timeval  tv_begin;
 780         struct timeval  tv_end;
 781         struct timespec ts_wait;
 782         struct timespec ts_int;
 783
 784         int optind;
 785         int i;
 786         int status;
 787 #if _POSIX_SAVED_IDS
 788         uid_t saved_set_uid;
 789
 790         /* Save the old effective user id */
 791         saved_set_uid = geteuid ();
 792         /* Set the effective user ID to the real user ID without changing the
 793          * saved set-user ID */
 794         status = seteuid (getuid ());
 795         if (status != 0)
 796         {
 797                 fprintf (stderr, "Temporarily dropping privileges "
 798                                 "failed: %s\n", strerror (errno));
 799                 exit (EXIT_FAILURE);
 800         }
 801 #endif
 802
 803         optind = read_options (argc, argv);
 804
 805 #if !_POSIX_SAVED_IDS
 806         /* Cannot temporarily drop privileges -> reject every file but "-". */
 807         if ((opt_filename != NULL)
 808                         && (strcmp ("-", opt_filename) != 0)
 809                         && (getuid () != geteuid ()))
 810         {
 811                 fprintf (stderr, "Your real and effective user IDs don't "
 812                                 "match. Reading from a file (option '-f')\n"
 813                                 "is therefore too risky. You can still read "
 814                                 "from STDIN using '-f -' if you like.\n"
 815                                 "Sorry.\n");
 816                 exit (EXIT_FAILURE);
 817         }
 818 #endif
 819
 820         if ((optind >= argc) && (opt_filename == NULL)) {
 821                 usage_exit (argv[0], 1);
 822         }
 823
 824         if ((ping = ping_construct ()) == NULL)
 825         {
 826                 fprintf (stderr, "ping_construct failed\n");
 827                 return (1);
 828         }
 829
 830         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
 831         {
 832                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
 833                                 opt_send_ttl, ping_get_error (ping));
 834         }
 835
 836         {
 837                 double temp_sec;
 838                 double temp_nsec;
 839
 840                 temp_nsec = modf (opt_interval, &temp_sec);
 841                 ts_int.tv_sec  = (time_t) temp_sec;
 842                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
 843
 844                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
 845         }
 846
 847         if (opt_addrfamily != PING_DEF_AF)
 848                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
 849
 850         if (opt_srcaddr != NULL)
 851         {
 852                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
 853                 {
 854                         fprintf (stderr, "Setting source address failed: %s\n",
 855                                         ping_get_error (ping));
 856                 }
 857         }
 858
 859         if (opt_device != NULL)
 860         {
 861                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
 862                 {
 863                         fprintf (stderr, "Setting device failed: %s\n",
 864                                         ping_get_error (ping));
 865                 }
 866         }
 867
 868         if (opt_filename != NULL)
 869         {
 870                 FILE *infile;
 871                 char line[256];
 872                 char host[256];
 873
 874                 if (strcmp (opt_filename, "-") == 0)
 875                         /* Open STDIN */
 876                         infile = fdopen(0, "r");
 877                 else
 878                         infile = fopen(opt_filename, "r");
 879
 880                 if (infile == NULL)
 881                 {
 882                         fprintf (stderr, "Opening %s failed: %s\n",
 883                                         (strcmp (opt_filename, "-") == 0)
 884                                         ? "STDIN" : opt_filename,
 885                                         strerror(errno));
 886                         return (1);
 887                 }
 888
 889 #if _POSIX_SAVED_IDS
 890                 /* Regain privileges */
 891                 status = seteuid (saved_set_uid);
 892                 if (status != 0)
 893                 {
 894                         fprintf (stderr, "Temporarily re-gaining privileges "
 895                                         "failed: %s\n", strerror (errno));
 896                         exit (EXIT_FAILURE);
 897                 }
 898 #endif
 899
 900                 while (fgets(line, sizeof(line), infile))
 901                 {
 902                         /* Strip whitespace */
 903                         if (sscanf(line, "%s", host) != 1)
 904                                 continue;
 905
 906                         if ((host[0] == 0) || (host[0] == '#'))
 907                                 continue;
 908
 909                         if (ping_host_add(ping, host) < 0)
 910                         {
 911                                 const char *errmsg = ping_get_error (ping);
 912
 913                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
 914                                 continue;
 915                         }
 916                         else
 917                         {
 918                                 host_num++;
 919                         }
 920                 }
 921
 922 #if _POSIX_SAVED_IDS
 923                 /* Drop privileges */
 924                 status = seteuid (getuid ());
 925                 if (status != 0)
 926                 {
 927                         fprintf (stderr, "Temporarily dropping privileges "
 928                                         "failed: %s\n", strerror (errno));
 929                         exit (EXIT_FAILURE);
 930                 }
 931 #endif
 932
 933                 fclose(infile);
 934         }
 935
 936 #if _POSIX_SAVED_IDS
 937         /* Regain privileges */
 938         status = seteuid (saved_set_uid);
 939         if (status != 0)
 940         {
 941                 fprintf (stderr, "Temporarily re-gaining privileges "
 942                                 "failed: %s\n", strerror (errno));
 943                 exit (EXIT_FAILURE);
 944         }
 945 #endif
 946
 947         for (i = optind; i < argc; i++)
 948         {
 949                 if (ping_host_add (ping, argv[i]) < 0)
 950                 {
 951                         const char *errmsg = ping_get_error (ping);
 952
 953                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
 954                         continue;
 955                 }
 956                 else
 957                 {
 958                         host_num++;
 959                 }
 960         }
 961
 962         /* Permanently drop root privileges if we're setuid-root. */
 963         status = setuid (getuid ());
 964         if (status != 0)
 965         {
 966                 fprintf (stderr, "Dropping privileges failed: %s\n",
 967                                 strerror (errno));
 968                 exit (EXIT_FAILURE);
 969         }
 970
 971 #if _POSIX_SAVED_IDS
 972         saved_set_uid = (uid_t) -1;
 973 #endif
 974
 975         ping_initialize_contexts (ping);
 976
 977         if (i == 0)
 978                 return (1);
 979
 980         memset (&sigint_action, '\0', sizeof (sigint_action));
 981         sigint_action.sa_handler = sigint_handler;
 982         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
 983         {
 984                 perror ("sigaction");
 985                 return (1);
 986         }
 987
 988         pre_loop_hook (ping);
 989
 990         while (opt_count != 0)
 991         {
 992                 int index;
 993                 int status;
 994
 995                 if (gettimeofday (&tv_begin, NULL) < 0)
 996                 {
 997                         perror ("gettimeofday");
 998                         return (1);
 999                 }
1000
1001                 if (ping_send (ping) < 0)
1002                 {
1003                         fprintf (stderr, "ping_send failed: %s\n",
1004                                         ping_get_error (ping));
1005                         return (1);
1006                 }
1007
1008                 index = 0;
1009                 for (iter = ping_iterator_get (ping);
1010                                 iter != NULL;
1011                                 iter = ping_iterator_next (iter))
1012                 {
1013                         update_host_hook (iter, index);
1014                         index++;
1015                 }
1016
1017                 pre_sleep_hook (ping);
1018
1019                 /* Don't sleep in the last iteration */
1020                 if (opt_count == 1)
1021                         break;
1022
1023                 if (gettimeofday (&tv_end, NULL) < 0)
1024                 {
1025                         perror ("gettimeofday");
1026                         return (1);
1027                 }
1028
1029                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1030
1031                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1032                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1033                 {
1034                         if (errno != EINTR)
1035                         {
1036                                 perror ("nanosleep");
1037                                 break;
1038                         }
1039                         else if (opt_count == 0)
1040                         {
1041                                 /* sigint */
1042                                 break;
1043                         }
1044                 }
1045
1046                 post_sleep_hook (ping);
1047
1048                 if (opt_count > 0)
1049                         opt_count--;
1050         } /* while (opt_count != 0) */
1051
1052         post_loop_hook (ping);
1053
1054         ping_destroy (ping);
1055
1056         return (0);
1057 } /* }}} int main */
1058
1059 /* vim: set fdm=marker : */