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_SYS_SOCKET_H
  56 # include <sys/socket.h>
  57 #endif
  58 #if HAVE_NETINET_IN_H
  59 # include <netinet/in.h>
  60 #endif
  61 #if HAVE_NETINET_IP_H
  62 # include <netinet/ip.h>
  63 #endif
  64
  65 #if HAVE_NETDB_H
  66 # include <netdb.h> /* NI_MAXHOST */
  67 #endif
  68
  69 #if HAVE_SIGNAL_H
  70 # include <signal.h>
  71 #endif
  72
  73 #if HAVE_SYS_TYPES_H
  74 #include <sys/types.h>
  75 #endif
  76
  77 #if USE_NCURSES
  78 # define NCURSES_OPAQUE 1
  79 # include <ncurses.h>
  80
  81 # define OPING_GREEN 1
  82 # define OPING_YELLOW 2
  83 # define OPING_RED 3
  84 #endif
  85
  86 #include "oping.h"
  87
  88 #ifndef _POSIX_SAVED_IDS
  89 # define _POSIX_SAVED_IDS 0
  90 #endif
  91
  92 typedef struct ping_context
  93 {
  94         char host[NI_MAXHOST];
  95         char addr[NI_MAXHOST];
  96
  97         int index;
  98         int req_sent;
  99         int req_rcvd;
 100
 101         double latency_min;
 102         double latency_max;
 103         double latency_total;
 104         double latency_total_square;
 105
 106 #if USE_NCURSES
 107         WINDOW *window;
 108 #endif
 109 } ping_context_t;
 110
 111 static double  opt_interval   = 1.0;
 112 static int     opt_addrfamily = PING_DEF_AF;
 113 static char   *opt_srcaddr    = NULL;
 114 static char   *opt_device     = NULL;
 115 static char   *opt_filename   = NULL;
 116 static int     opt_count      = -1;
 117 static int     opt_send_ttl   = 64;
 118 static uint8_t opt_send_tos   = 0;
 119
 120 static int host_num = 0;
 121
 122 #if USE_NCURSES
 123 static WINDOW *main_win = NULL;
 124 #endif
 125
 126 static void sigint_handler (int signal) /* {{{ */
 127 {
 128         /* Make compiler happy */
 129         signal = 0;
 130         /* Exit the loop */
 131         opt_count = 0;
 132 } /* }}} void sigint_handler */
 133
 134 static ping_context_t *context_create (void) /* {{{ */
 135 {
 136         ping_context_t *ret;
 137
 138         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 139                 return (NULL);
 140
 141         memset (ret, '\0', sizeof (ping_context_t));
 142
 143         ret->latency_min   = -1.0;
 144         ret->latency_max   = -1.0;
 145         ret->latency_total = 0.0;
 146         ret->latency_total_square = 0.0;
 147
 148 #if USE_NCURSES
 149         ret->window = NULL;
 150 #endif
 151
 152         return (ret);
 153 } /* }}} ping_context_t *context_create */
 154
 155 static void context_destroy (ping_context_t *context) /* {{{ */
 156 {
 157         if (context == NULL)
 158                 return;
 159
 160 #if USE_NCURSES
 161         if (context->window != NULL)
 162         {
 163                 delwin (context->window);
 164                 context->window = NULL;
 165         }
 166 #endif
 167
 168         free (context);
 169 } /* }}} void context_destroy */
 170
 171 static double context_get_average (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
 181         num_total = (double) ctx->req_rcvd;
 182         return (ctx->latency_total / num_total);
 183 } /* }}} double context_get_average */
 184
 185 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 186 {
 187         double num_total;
 188
 189         if (ctx == NULL)
 190                 return (-1.0);
 191
 192         if (ctx->req_rcvd < 1)
 193                 return (-0.0);
 194         else if (ctx->req_rcvd < 2)
 195                 return (0.0);
 196
 197         num_total = (double) ctx->req_rcvd;
 198         return (sqrt (((num_total * ctx->latency_total_square)
 199                                         - (ctx->latency_total * ctx->latency_total))
 200                                 / (num_total * (num_total - 1.0))));
 201 } /* }}} double context_get_stddev */
 202
 203 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 204 {
 205         if (ctx == NULL)
 206                 return (-1.0);
 207
 208         if (ctx->req_sent < 1)
 209                 return (0.0);
 210
 211         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 212                         / ((double) ctx->req_sent));
 213 } /* }}} double context_get_packet_loss */
 214
 215 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 216 {
 217         pingobj_iter_t *iter;
 218         int index;
 219
 220         if (ping == NULL)
 221                 return (EINVAL);
 222
 223         index = 0;
 224         for (iter = ping_iterator_get (ping);
 225                         iter != NULL;
 226                         iter = ping_iterator_next (iter))
 227         {
 228                 ping_context_t *context;
 229                 size_t buffer_size;
 230
 231                 context = context_create ();
 232                 context->index = index;
 233
 234                 buffer_size = sizeof (context->host);
 235                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 236
 237                 buffer_size = sizeof (context->addr);
 238                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 239
 240                 ping_iterator_set_context (iter, (void *) context);
 241
 242                 index++;
 243         }
 244
 245         return (0);
 246 } /* }}} int ping_initialize_contexts */
 247
 248 static void usage_exit (const char *name, int status) /* {{{ */
 249 {
 250         int name_length;
 251
 252         name_length = (int) strlen (name);
 253
 254         fprintf (stderr, "Usage: %s [OPTIONS] "
 255                                 "-f filename | host [host [host ...]]\n"
 256
 257                         "\nAvailable options:\n"
 258                         "  -4|-6        force the use of IPv4 or IPv6\n"
 259                         "  -c count     number of ICMP packets to send\n"
 260                         "  -i interval  interval with which to send ICMP packets\n"
 261                         "  -t ttl       time to live for each ICMP packet\n"
 262                         "  -z tos       Type-of-service/class-of-service for each ICMP packet\n"
 263                         "  -I srcaddr   source address\n"
 264                         "  -D device    outgoing interface name\n"
 265                         "  -f filename  filename to read hosts from\n"
 266
 267                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 268                         "by Florian octo Forster <octo@verplant.org>\n"
 269                         "for contributions see `AUTHORS'\n",
 270                         name);
 271         exit (status);
 272 } /* }}} void usage_exit */
 273
 274 static void usage_tos_exit (const char *arg, int status) /* {{{ */
 275 {
 276         if (arg != 0)
 277                 fprintf (stderr, "Invalid ToS argument: \"%s\"\n\n", arg);
 278
 279         fprintf (stderr, "Valid ToS arguments (option \"-z\") are:\n"
 280                         "\n"
 281                         "    lowdelay     (%#04x)    minimize delays\n"
 282                         "    throughput   (%#04x)    optimize throughput\n"
 283                         "    reliability  (%#04x)    optimize reliability\n"
 284                         "    mincost      (%#04x)    minimize cost\n"
 285                         "    0x00 - 0xff            specify manually\n"
 286                         "\n",
 287                         (unsigned int) IPTOS_LOWDELAY,
 288                         (unsigned int) IPTOS_THROUGHPUT,
 289                         (unsigned int) IPTOS_RELIABILITY,
 290                         (unsigned int) IPTOS_MINCOST);
 291
 292         exit (status);
 293 } /* }}} void usage_tos_exit */
 294
 295 static int set_opt_send_tos (const char *opt) /* {{{ */
 296 {
 297         if (opt == NULL)
 298                 return (EINVAL);
 299
 300         if (strcasecmp ("lowdelay", opt) == 0)
 301                 opt_send_tos = IPTOS_LOWDELAY;
 302         else if (strcasecmp ("throughput", opt) == 0)
 303                 opt_send_tos = IPTOS_THROUGHPUT;
 304         else if (strcasecmp ("reliability", opt) == 0)
 305                 opt_send_tos = IPTOS_RELIABILITY;
 306         else if (strcasecmp ("mincost", opt) == 0)
 307                 opt_send_tos = IPTOS_MINCOST;
 308         else if (strcasecmp ("help", opt) == 0)
 309                 usage_tos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
 310         else
 311         {
 312                 unsigned long value;
 313                 char *endptr;
 314
 315                 errno = 0;
 316                 endptr = NULL;
 317                 value = strtoul (opt, &endptr, /* base = */ 0);
 318                 if ((errno != 0) || (endptr == opt)
 319                                 || (endptr == NULL) || (*endptr != 0)
 320                                 || (value >= 0xff))
 321                         usage_tos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 322
 323                 opt_send_tos = (uint8_t) value;
 324         }
 325
 326         return (0);
 327 } /* }}} int set_opt_send_tos */
 328
 329 static int read_options (int argc, char **argv) /* {{{ */
 330 {
 331         int optchar;
 332
 333         while (1)
 334         {
 335                 optchar = getopt (argc, argv, "46c:hi:I:t:z:f:D:");
 336
 337                 if (optchar == -1)
 338                         break;
 339
 340                 switch (optchar)
 341                 {
 342                         case '4':
 343                         case '6':
 344                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 345                                 break;
 346
 347                         case 'c':
 348                                 {
 349                                         int new_count;
 350                                         new_count = atoi (optarg);
 351                                         if (new_count > 0)
 352                                                 opt_count = new_count;
 353                                         else
 354                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 355                                                                 optarg);
 356                                 }
 357                                 break;
 358
 359                         case 'f':
 360                                 {
 361                                         if (opt_filename != NULL)
 362                                                 free (opt_filename);
 363                                         opt_filename = strdup (optarg);
 364                                 }
 365                                 break;
 366
 367                         case 'i':
 368                                 {
 369                                         double new_interval;
 370                                         new_interval = atof (optarg);
 371                                         if (new_interval < 0.001)
 372                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 373                                                                 optarg);
 374                                         else
 375                                                 opt_interval = new_interval;
 376                                 }
 377                                 break;
 378                         case 'I':
 379                                 {
 380                                         if (opt_srcaddr != NULL)
 381                                                 free (opt_srcaddr);
 382                                         opt_srcaddr = strdup (optarg);
 383                                 }
 384                                 break;
 385
 386                         case 'D':
 387                                 opt_device = optarg;
 388                                 break;
 389
 390                         case 't':
 391                         {
 392                                 int new_send_ttl;
 393                                 new_send_ttl = atoi (optarg);
 394                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 395                                         opt_send_ttl = new_send_ttl;
 396                                 else
 397                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 398                                                         optarg);
 399                                 break;
 400                         }
 401
 402                         case 'z':
 403                                 set_opt_send_tos (optarg);
 404                                 break;
 405
 406                         case 'h':
 407                                 usage_exit (argv[0], 0);
 408                                 break;
 409                         default:
 410                                 usage_exit (argv[0], 1);
 411                 }
 412         }
 413
 414         return (optind);
 415 } /* }}} read_options */
 416
 417 static void time_normalize (struct timespec *ts) /* {{{ */
 418 {
 419         while (ts->tv_nsec < 0)
 420         {
 421                 if (ts->tv_sec == 0)
 422                 {
 423                         ts->tv_nsec = 0;
 424                         return;
 425                 }
 426
 427                 ts->tv_sec  -= 1;
 428                 ts->tv_nsec += 1000000000;
 429         }
 430
 431         while (ts->tv_nsec >= 1000000000)
 432         {
 433                 ts->tv_sec  += 1;
 434                 ts->tv_nsec -= 1000000000;
 435         }
 436 } /* }}} void time_normalize */
 437
 438 static void time_calc (struct timespec *ts_dest, /* {{{ */
 439                 const struct timespec *ts_int,
 440                 const struct timeval  *tv_begin,
 441                 const struct timeval  *tv_end)
 442 {
 443         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 444         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 445         time_normalize (ts_dest);
 446
 447         /* Assure that `(begin + interval) > end'.
 448          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 449          * which may be `unsigned. *sigh* */
 450         if ((tv_end->tv_sec > ts_dest->tv_sec)
 451                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 452                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 453         {
 454                 ts_dest->tv_sec  = 0;
 455                 ts_dest->tv_nsec = 0;
 456                 return;
 457         }
 458
 459         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 460         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 461         time_normalize (ts_dest);
 462 } /* }}} void time_calc */
 463
 464 #if USE_NCURSES
 465 static int update_stats_from_context (ping_context_t *ctx) /* {{{ */
 466 {
 467         if ((ctx == NULL) || (ctx->window == NULL))
 468                 return (EINVAL);
 469
 470         werase (ctx->window);
 471
 472         box (ctx->window, 0, 0);
 473         wattron (ctx->window, A_BOLD);
 474         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 475                         " %s ", ctx->host);
 476         wattroff (ctx->window, A_BOLD);
 477         wprintw (ctx->window, "ping statistics ");
 478         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 479                         "%i packets transmitted, %i received, %.2f%% packet "
 480                         "loss, time %.1fms",
 481                         ctx->req_sent, ctx->req_rcvd,
 482                         context_get_packet_loss (ctx),
 483                         ctx->latency_total);
 484         if (ctx->req_rcvd != 0)
 485         {
 486                 double average;
 487                 double deviation;
 488
 489                 average = context_get_average (ctx);
 490                 deviation = context_get_stddev (ctx);
 491
 492                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 493                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 494                                 ctx->latency_min,
 495                                 average,
 496                                 ctx->latency_max,
 497                                 deviation);
 498         }
 499
 500         wrefresh (ctx->window);
 501
 502         return (0);
 503 } /* }}} int update_stats_from_context */
 504
 505 static int on_resize (pingobj_t *ping) /* {{{ */
 506 {
 507         pingobj_iter_t *iter;
 508         int width = 0;
 509         int height = 0;
 510         int main_win_height;
 511
 512         getmaxyx (stdscr, height, width);
 513         if ((height < 1) || (width < 1))
 514                 return (EINVAL);
 515
 516         main_win_height = height - (4 * host_num);
 517         wresize (main_win, main_win_height, /* width = */ width);
 518         /* Allow scrolling */
 519         scrollok (main_win, TRUE);
 520         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 521         /* Allow hardware accelerated scrolling. */
 522         idlok (main_win, TRUE);
 523         wrefresh (main_win);
 524
 525         for (iter = ping_iterator_get (ping);
 526                         iter != NULL;
 527                         iter = ping_iterator_next (iter))
 528         {
 529                 ping_context_t *context;
 530
 531                 context = ping_iterator_get_context (iter);
 532                 if (context == NULL)
 533                         continue;
 534
 535                 if (context->window != NULL)
 536                 {
 537                         delwin (context->window);
 538                         context->window = NULL;
 539                 }
 540                 context->window = newwin (/* height = */ 4,
 541                                 /* width = */ 0,
 542                                 /* y = */ main_win_height + (4 * context->index),
 543                                 /* x = */ 0);
 544         }
 545
 546         return (0);
 547 } /* }}} */
 548
 549 static int check_resize (pingobj_t *ping) /* {{{ */
 550 {
 551         int need_resize = 0;
 552
 553         while (42)
 554         {
 555                 int key = wgetch (stdscr);
 556                 if (key == ERR)
 557                         break;
 558                 else if (key == KEY_RESIZE)
 559                         need_resize = 1;
 560         }
 561
 562         if (need_resize)
 563                 return (on_resize (ping));
 564         else
 565                 return (0);
 566 } /* }}} int check_resize */
 567
 568 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 569 {
 570         pingobj_iter_t *iter;
 571         int width = 0;
 572         int height = 0;
 573         int main_win_height;
 574
 575         initscr ();
 576         cbreak ();
 577         noecho ();
 578         nodelay (stdscr, TRUE);
 579
 580         getmaxyx (stdscr, height, width);
 581         if ((height < 1) || (width < 1))
 582                 return (EINVAL);
 583
 584         if (has_colors () == TRUE)
 585         {
 586                 start_color ();
 587                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 588                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 589                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 590         }
 591
 592         main_win_height = height - (4 * host_num);
 593         main_win = newwin (/* height = */ main_win_height,
 594                         /* width = */ 0,
 595                         /* y = */ 0, /* x = */ 0);
 596         /* Allow scrolling */
 597         scrollok (main_win, TRUE);
 598         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 599         /* Allow hardware accelerated scrolling. */
 600         idlok (main_win, TRUE);
 601         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
 602         wrefresh (main_win);
 603
 604         for (iter = ping_iterator_get (ping);
 605                         iter != NULL;
 606                         iter = ping_iterator_next (iter))
 607         {
 608                 ping_context_t *context;
 609
 610                 context = ping_iterator_get_context (iter);
 611                 if (context == NULL)
 612                         continue;
 613
 614                 if (context->window != NULL)
 615                 {
 616                         delwin (context->window);
 617                         context->window = NULL;
 618                 }
 619                 context->window = newwin (/* height = */ 4,
 620                                 /* width = */ 0,
 621                                 /* y = */ main_win_height + (4 * context->index),
 622                                 /* x = */ 0);
 623         }
 624
 625
 626         /* Don't know what good this does exactly, but without this code
 627          * "check_resize" will be called right after startup and *somehow*
 628          * this leads to display errors. If we purge all initial characters
 629          * here, the problem goes away. "wgetch" is non-blocking due to
 630          * "nodelay" (see above). */
 631         while (wgetch (stdscr) != ERR)
 632         {
 633                 /* eat up characters */;
 634         }
 635
 636         return (0);
 637 } /* }}} int pre_loop_hook */
 638
 639 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
 640 {
 641         return (check_resize (ping));
 642 } /* }}} int pre_sleep_hook */
 643
 644 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
 645 {
 646         return (check_resize (ping));
 647 } /* }}} int pre_sleep_hook */
 648 #else /* if !USE_NCURSES */
 649 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 650 {
 651         pingobj_iter_t *iter;
 652
 653         for (iter = ping_iterator_get (ping);
 654                         iter != NULL;
 655                         iter = ping_iterator_next (iter))
 656         {
 657                 ping_context_t *ctx;
 658                 size_t buffer_size;
 659
 660                 ctx = ping_iterator_get_context (iter);
 661                 if (ctx == NULL)
 662                         continue;
 663
 664                 buffer_size = 0;
 665                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 666
 667                 printf ("PING %s (%s) %zu bytes of data.\n",
 668                                 ctx->host, ctx->addr, buffer_size);
 669         }
 670
 671         return (0);
 672 } /* }}} int pre_loop_hook */
 673
 674 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 675 {
 676         fflush (stdout);
 677
 678         return (0);
 679 } /* }}} int pre_sleep_hook */
 680
 681 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 682 {
 683         return (0);
 684 } /* }}} int post_sleep_hook */
 685 #endif
 686
 687 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
 688                 int index)
 689 {
 690         double          latency;
 691         unsigned int    sequence;
 692         int             recv_ttl;
 693         uint8_t         recv_tos;
 694         size_t          buffer_len;
 695         size_t          data_len;
 696         ping_context_t *context;
 697
 698         latency = -1.0;
 699         buffer_len = sizeof (latency);
 700         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 701                         &latency, &buffer_len);
 702
 703         sequence = 0;
 704         buffer_len = sizeof (sequence);
 705         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 706                         &sequence, &buffer_len);
 707
 708         recv_ttl = -1;
 709         buffer_len = sizeof (recv_ttl);
 710         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 711                         &recv_ttl, &buffer_len);
 712
 713         recv_tos = 0;
 714         buffer_len = sizeof (recv_tos);
 715         ping_iterator_get_info (iter, PING_INFO_RECV_TOS,
 716                         &recv_tos, &buffer_len);
 717
 718         data_len = 0;
 719         ping_iterator_get_info (iter, PING_INFO_DATA,
 720                         NULL, &data_len);
 721
 722         context = (ping_context_t *) ping_iterator_get_context (iter);
 723
 724 #if USE_NCURSES
 725 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
 726 #else
 727 # define HOST_PRINTF(...) printf(__VA_ARGS__)
 728 #endif
 729
 730         context->req_sent++;
 731         if (latency > 0.0)
 732         {
 733                 context->req_rcvd++;
 734                 context->latency_total += latency;
 735                 context->latency_total_square += (latency * latency);
 736
 737                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 738                         context->latency_max = latency;
 739                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 740                         context->latency_min = latency;
 741
 742 #if USE_NCURSES
 743                 if (has_colors () == TRUE)
 744                 {
 745                         int color = OPING_GREEN;
 746                         double average = context_get_average (context);
 747                         double stddev = context_get_stddev (context);
 748
 749                         if ((latency < (average - (2 * stddev)))
 750                                         || (latency > (average + (2 * stddev))))
 751                                 color = OPING_RED;
 752                         else if ((latency < (average - stddev))
 753                                         || (latency > (average + stddev)))
 754                                 color = OPING_YELLOW;
 755
 756                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i tos=0x%02"PRIx8
 757                                         " time=",
 758                                         data_len, context->host, context->addr,
 759                                         sequence, recv_ttl, recv_tos);
 760                         wattron (main_win, COLOR_PAIR(color));
 761                         HOST_PRINTF ("%.2f", latency);
 762                         wattroff (main_win, COLOR_PAIR(color));
 763                         HOST_PRINTF (" ms\n");
 764                 }
 765                 else
 766                 {
 767 #endif
 768                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i tos=0x%02"PRIx8
 769                                 " time=%.2f ms\n",
 770                                 data_len,
 771                                 context->host, context->addr,
 772                                 sequence, recv_ttl, recv_tos, latency);
 773 #if USE_NCURSES
 774                 }
 775 #endif
 776         }
 777         else
 778         {
 779 #if USE_NCURSES
 780                 if (has_colors () == TRUE)
 781                 {
 782                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
 783                                         context->host, context->addr,
 784                                         sequence);
 785                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 786                         HOST_PRINTF ("timeout");
 787                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
 788                         HOST_PRINTF ("\n");
 789                 }
 790                 else
 791                 {
 792 #endif
 793                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 794                                 context->host, context->addr,
 795                                 sequence);
 796 #if USE_NCURSES
 797                 }
 798 #endif
 799         }
 800
 801 #if USE_NCURSES
 802         update_stats_from_context (context);
 803         wrefresh (main_win);
 804 #endif
 805 } /* }}} void update_host_hook */
 806
 807 static int post_loop_hook (pingobj_t *ping) /* {{{ */
 808 {
 809         pingobj_iter_t *iter;
 810
 811 #if USE_NCURSES
 812         endwin ();
 813 #endif
 814
 815         for (iter = ping_iterator_get (ping);
 816                         iter != NULL;
 817                         iter = ping_iterator_next (iter))
 818         {
 819                 ping_context_t *context;
 820
 821                 context = ping_iterator_get_context (iter);
 822
 823                 printf ("\n--- %s ping statistics ---\n"
 824                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 825                                 context->host, context->req_sent, context->req_rcvd,
 826                                 context_get_packet_loss (context),
 827                                 context->latency_total);
 828
 829                 if (context->req_rcvd != 0)
 830                 {
 831                         double average;
 832                         double deviation;
 833
 834                         average = context_get_average (context);
 835                         deviation = context_get_stddev (context);
 836
 837                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 838                                         context->latency_min,
 839                                         average,
 840                                         context->latency_max,
 841                                         deviation);
 842                 }
 843
 844                 ping_iterator_set_context (iter, NULL);
 845                 context_destroy (context);
 846         }
 847
 848         return (0);
 849 } /* }}} int post_loop_hook */
 850
 851 int main (int argc, char **argv) /* {{{ */
 852 {
 853         pingobj_t      *ping;
 854         pingobj_iter_t *iter;
 855
 856         struct sigaction sigint_action;
 857
 858         struct timeval  tv_begin;
 859         struct timeval  tv_end;
 860         struct timespec ts_wait;
 861         struct timespec ts_int;
 862
 863         int optind;
 864         int i;
 865         int status;
 866 #if _POSIX_SAVED_IDS
 867         uid_t saved_set_uid;
 868
 869         /* Save the old effective user id */
 870         saved_set_uid = geteuid ();
 871         /* Set the effective user ID to the real user ID without changing the
 872          * saved set-user ID */
 873         status = seteuid (getuid ());
 874         if (status != 0)
 875         {
 876                 fprintf (stderr, "Temporarily dropping privileges "
 877                                 "failed: %s\n", strerror (errno));
 878                 exit (EXIT_FAILURE);
 879         }
 880 #endif
 881
 882         optind = read_options (argc, argv);
 883
 884 #if !_POSIX_SAVED_IDS
 885         /* Cannot temporarily drop privileges -> reject every file but "-". */
 886         if ((opt_filename != NULL)
 887                         && (strcmp ("-", opt_filename) != 0)
 888                         && (getuid () != geteuid ()))
 889         {
 890                 fprintf (stderr, "Your real and effective user IDs don't "
 891                                 "match. Reading from a file (option '-f')\n"
 892                                 "is therefore too risky. You can still read "
 893                                 "from STDIN using '-f -' if you like.\n"
 894                                 "Sorry.\n");
 895                 exit (EXIT_FAILURE);
 896         }
 897 #endif
 898
 899         if ((optind >= argc) && (opt_filename == NULL)) {
 900                 usage_exit (argv[0], 1);
 901         }
 902
 903         if ((ping = ping_construct ()) == NULL)
 904         {
 905                 fprintf (stderr, "ping_construct failed\n");
 906                 return (1);
 907         }
 908
 909         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
 910         {
 911                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
 912                                 opt_send_ttl, ping_get_error (ping));
 913         }
 914
 915         if (ping_setopt (ping, PING_OPT_TOS, &opt_send_tos) != 0)
 916         {
 917                 fprintf (stderr, "Setting TOS to %i failed: %s\n",
 918                                 opt_send_tos, ping_get_error (ping));
 919         }
 920
 921         {
 922                 double temp_sec;
 923                 double temp_nsec;
 924
 925                 temp_nsec = modf (opt_interval, &temp_sec);
 926                 ts_int.tv_sec  = (time_t) temp_sec;
 927                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
 928
 929                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
 930         }
 931
 932         if (opt_addrfamily != PING_DEF_AF)
 933                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
 934
 935         if (opt_srcaddr != NULL)
 936         {
 937                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
 938                 {
 939                         fprintf (stderr, "Setting source address failed: %s\n",
 940                                         ping_get_error (ping));
 941                 }
 942         }
 943
 944         if (opt_device != NULL)
 945         {
 946                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
 947                 {
 948                         fprintf (stderr, "Setting device failed: %s\n",
 949                                         ping_get_error (ping));
 950                 }
 951         }
 952
 953         if (opt_filename != NULL)
 954         {
 955                 FILE *infile;
 956                 char line[256];
 957                 char host[256];
 958
 959                 if (strcmp (opt_filename, "-") == 0)
 960                         /* Open STDIN */
 961                         infile = fdopen(0, "r");
 962                 else
 963                         infile = fopen(opt_filename, "r");
 964
 965                 if (infile == NULL)
 966                 {
 967                         fprintf (stderr, "Opening %s failed: %s\n",
 968                                         (strcmp (opt_filename, "-") == 0)
 969                                         ? "STDIN" : opt_filename,
 970                                         strerror(errno));
 971                         return (1);
 972                 }
 973
 974 #if _POSIX_SAVED_IDS
 975                 /* Regain privileges */
 976                 status = seteuid (saved_set_uid);
 977                 if (status != 0)
 978                 {
 979                         fprintf (stderr, "Temporarily re-gaining privileges "
 980                                         "failed: %s\n", strerror (errno));
 981                         exit (EXIT_FAILURE);
 982                 }
 983 #endif
 984
 985                 while (fgets(line, sizeof(line), infile))
 986                 {
 987                         /* Strip whitespace */
 988                         if (sscanf(line, "%s", host) != 1)
 989                                 continue;
 990
 991                         if ((host[0] == 0) || (host[0] == '#'))
 992                                 continue;
 993
 994                         if (ping_host_add(ping, host) < 0)
 995                         {
 996                                 const char *errmsg = ping_get_error (ping);
 997
 998                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
 999                                 continue;
1000                         }
1001                         else
1002                         {
1003                                 host_num++;
1004                         }
1005                 }
1006
1007 #if _POSIX_SAVED_IDS
1008                 /* Drop privileges */
1009                 status = seteuid (getuid ());
1010                 if (status != 0)
1011                 {
1012                         fprintf (stderr, "Temporarily dropping privileges "
1013                                         "failed: %s\n", strerror (errno));
1014                         exit (EXIT_FAILURE);
1015                 }
1016 #endif
1017
1018                 fclose(infile);
1019         }
1020
1021 #if _POSIX_SAVED_IDS
1022         /* Regain privileges */
1023         status = seteuid (saved_set_uid);
1024         if (status != 0)
1025         {
1026                 fprintf (stderr, "Temporarily re-gaining privileges "
1027                                 "failed: %s\n", strerror (errno));
1028                 exit (EXIT_FAILURE);
1029         }
1030 #endif
1031
1032         for (i = optind; i < argc; i++)
1033         {
1034                 if (ping_host_add (ping, argv[i]) < 0)
1035                 {
1036                         const char *errmsg = ping_get_error (ping);
1037
1038                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
1039                         continue;
1040                 }
1041                 else
1042                 {
1043                         host_num++;
1044                 }
1045         }
1046
1047         /* Permanently drop root privileges if we're setuid-root. */
1048         status = setuid (getuid ());
1049         if (status != 0)
1050         {
1051                 fprintf (stderr, "Dropping privileges failed: %s\n",
1052                                 strerror (errno));
1053                 exit (EXIT_FAILURE);
1054         }
1055
1056 #if _POSIX_SAVED_IDS
1057         saved_set_uid = (uid_t) -1;
1058 #endif
1059
1060         ping_initialize_contexts (ping);
1061
1062         if (i == 0)
1063                 return (1);
1064
1065         memset (&sigint_action, '\0', sizeof (sigint_action));
1066         sigint_action.sa_handler = sigint_handler;
1067         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1068         {
1069                 perror ("sigaction");
1070                 return (1);
1071         }
1072
1073         pre_loop_hook (ping);
1074
1075         while (opt_count != 0)
1076         {
1077                 int index;
1078                 int status;
1079
1080                 if (gettimeofday (&tv_begin, NULL) < 0)
1081                 {
1082                         perror ("gettimeofday");
1083                         return (1);
1084                 }
1085
1086                 if (ping_send (ping) < 0)
1087                 {
1088                         fprintf (stderr, "ping_send failed: %s\n",
1089                                         ping_get_error (ping));
1090                         return (1);
1091                 }
1092
1093                 index = 0;
1094                 for (iter = ping_iterator_get (ping);
1095                                 iter != NULL;
1096                                 iter = ping_iterator_next (iter))
1097                 {
1098                         update_host_hook (iter, index);
1099                         index++;
1100                 }
1101
1102                 pre_sleep_hook (ping);
1103
1104                 /* Don't sleep in the last iteration */
1105                 if (opt_count == 1)
1106                         break;
1107
1108                 if (gettimeofday (&tv_end, NULL) < 0)
1109                 {
1110                         perror ("gettimeofday");
1111                         return (1);
1112                 }
1113
1114                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1115
1116                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1117                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1118                 {
1119                         if (errno != EINTR)
1120                         {
1121                                 perror ("nanosleep");
1122                                 break;
1123                         }
1124                         else if (opt_count == 0)
1125                         {
1126                                 /* sigint */
1127                                 break;
1128                         }
1129                 }
1130
1131                 post_sleep_hook (ping);
1132
1133                 if (opt_count > 0)
1134                         opt_count--;
1135         } /* while (opt_count != 0) */
1136
1137         post_loop_hook (ping);
1138
1139         ping_destroy (ping);
1140
1141         return (0);
1142 } /* }}} int main */
1143
1144 /* vim: set fdm=marker : */