src/oping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006-2011  Florian octo Forster <ff at octo.it>
   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 #include <locale.h>
  78
  79 #if USE_NCURSES
  80 # define NCURSES_OPAQUE 1
  81 /* http://newsgroups.derkeiler.com/Archive/Rec/rec.games.roguelike.development/2010-09/msg00050.html */
  82 # define _X_OPEN_SOURCE_EXTENDED
  83 # include <ncursesw/ncurses.h>
  84
  85 /* some evilness: ncurses knows how to detect unicode, but won't
  86    expose it, yet there's this function that does what we want, so we
  87    steal it away from it */
  88 extern int    _nc_unicode_locale(void);
  89
  90 # define OPING_GREEN 1
  91 # define OPING_YELLOW 2
  92 # define OPING_RED 3
  93 # define OPING_GREEN_HIST 4
  94 # define OPING_YELLOW_HIST 5
  95 # define OPING_RED_HIST 6
  96
  97 static char const * const hist_symbols_utf8[] = {
  98         "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█" };
  99 static size_t const hist_symbols_utf8_num = sizeof (hist_symbols_utf8)
 100         / sizeof (hist_symbols_utf8[0]);
 101
 102 /* scancodes for 6 levels of horizontal bars, ncurses-specific */
 103 /* those are not the usual constants because those are not constant */
 104 static int const hist_symbols_acs[] = {
 105         115, /* ACS_S9 "⎽" */
 106         114, /* ACS_S7 "⎼" */
 107         113, /* ACS_S5 "─" */
 108         112, /* ACS_S3 "⎻" */
 109         111  /* ACS_S1 "⎺" */
 110 };
 111 static size_t const hist_symbols_acs_num = sizeof (hist_symbols_acs)
 112         / sizeof (hist_symbols_acs[0]);
 113
 114 /* use different colors without a background for scancodes */
 115 static int const hist_colors_utf8[] = {
 116         OPING_GREEN_HIST, OPING_YELLOW_HIST, OPING_RED_HIST };
 117 static int const hist_colors_acs[] = {
 118         OPING_GREEN, OPING_YELLOW, OPING_RED };
 119 /* assuming that both arrays are the same size */
 120 static size_t const hist_colors_num = sizeof (hist_colors_utf8)
 121         / sizeof (hist_colors_utf8[0]);
 122 #endif
 123
 124 #include "oping.h"
 125
 126 #ifndef _POSIX_SAVED_IDS
 127 # define _POSIX_SAVED_IDS 0
 128 #endif
 129
 130 /* Remove GNU specific __attribute__ settings when using another compiler */
 131 #if !__GNUC__
 132 # define __attribute__(x) /**/
 133 #endif
 134
 135 typedef struct ping_context
 136 {
 137         char host[NI_MAXHOST];
 138         char addr[NI_MAXHOST];
 139
 140         int index;
 141         int req_sent;
 142         int req_rcvd;
 143
 144         double latency_min;
 145         double latency_max;
 146         double latency_total;
 147         double latency_total_square;
 148
 149 #if USE_NCURSES
 150         WINDOW *window;
 151 #endif
 152 } ping_context_t;
 153
 154 static double  opt_interval   = 1.0;
 155 static int     opt_addrfamily = PING_DEF_AF;
 156 static char   *opt_srcaddr    = NULL;
 157 static char   *opt_device     = NULL;
 158 static char   *opt_filename   = NULL;
 159 static int     opt_count      = -1;
 160 static int     opt_send_ttl   = 64;
 161 static uint8_t opt_send_qos   = 0;
 162
 163 static int host_num = 0;
 164
 165 #if USE_NCURSES
 166 static WINDOW *main_win = NULL;
 167 #endif
 168
 169 static void sigint_handler (int signal) /* {{{ */
 170 {
 171         /* Make compiler happy */
 172         signal = 0;
 173         /* Exit the loop */
 174         opt_count = 0;
 175 } /* }}} void sigint_handler */
 176
 177 static ping_context_t *context_create (void) /* {{{ */
 178 {
 179         ping_context_t *ret;
 180
 181         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 182                 return (NULL);
 183
 184         memset (ret, '\0', sizeof (ping_context_t));
 185
 186         ret->latency_min   = -1.0;
 187         ret->latency_max   = -1.0;
 188         ret->latency_total = 0.0;
 189         ret->latency_total_square = 0.0;
 190
 191 #if USE_NCURSES
 192         ret->window = NULL;
 193 #endif
 194
 195         return (ret);
 196 } /* }}} ping_context_t *context_create */
 197
 198 static void context_destroy (ping_context_t *context) /* {{{ */
 199 {
 200         if (context == NULL)
 201                 return;
 202
 203 #if USE_NCURSES
 204         if (context->window != NULL)
 205         {
 206                 delwin (context->window);
 207                 context->window = NULL;
 208         }
 209 #endif
 210
 211         free (context);
 212 } /* }}} void context_destroy */
 213
 214 static double context_get_average (ping_context_t *ctx) /* {{{ */
 215 {
 216         double num_total;
 217
 218         if (ctx == NULL)
 219                 return (-1.0);
 220
 221         if (ctx->req_rcvd < 1)
 222                 return (-0.0);
 223
 224         num_total = (double) ctx->req_rcvd;
 225         return (ctx->latency_total / num_total);
 226 } /* }}} double context_get_average */
 227
 228 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 229 {
 230         double num_total;
 231
 232         if (ctx == NULL)
 233                 return (-1.0);
 234
 235         if (ctx->req_rcvd < 1)
 236                 return (-0.0);
 237         else if (ctx->req_rcvd < 2)
 238                 return (0.0);
 239
 240         num_total = (double) ctx->req_rcvd;
 241         return (sqrt (((num_total * ctx->latency_total_square)
 242                                         - (ctx->latency_total * ctx->latency_total))
 243                                 / (num_total * (num_total - 1.0))));
 244 } /* }}} double context_get_stddev */
 245
 246 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 247 {
 248         if (ctx == NULL)
 249                 return (-1.0);
 250
 251         if (ctx->req_sent < 1)
 252                 return (0.0);
 253
 254         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 255                         / ((double) ctx->req_sent));
 256 } /* }}} double context_get_packet_loss */
 257
 258 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 259 {
 260         pingobj_iter_t *iter;
 261         int index;
 262
 263         if (ping == NULL)
 264                 return (EINVAL);
 265
 266         index = 0;
 267         for (iter = ping_iterator_get (ping);
 268                         iter != NULL;
 269                         iter = ping_iterator_next (iter))
 270         {
 271                 ping_context_t *context;
 272                 size_t buffer_size;
 273
 274                 context = context_create ();
 275                 context->index = index;
 276
 277                 buffer_size = sizeof (context->host);
 278                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 279
 280                 buffer_size = sizeof (context->addr);
 281                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 282
 283                 ping_iterator_set_context (iter, (void *) context);
 284
 285                 index++;
 286         }
 287
 288         return (0);
 289 } /* }}} int ping_initialize_contexts */
 290
 291 static void usage_exit (const char *name, int status) /* {{{ */
 292 {
 293         fprintf (stderr, "Usage: %s [OPTIONS] "
 294                                 "-f filename | host [host [host ...]]\n"
 295
 296                         "\nAvailable options:\n"
 297                         "  -4|-6        force the use of IPv4 or IPv6\n"
 298                         "  -c count     number of ICMP packets to send\n"
 299                         "  -i interval  interval with which to send ICMP packets\n"
 300                         "  -t ttl       time to live for each ICMP packet\n"
 301                         "  -Q qos       Quality of Service (QoS) of outgoing packets\n"
 302                         "               Use \"-Q help\" for a list of valid options.\n"
 303                         "  -I srcaddr   source address\n"
 304                         "  -D device    outgoing interface name\n"
 305                         "  -f filename  filename to read hosts from\n"
 306
 307                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 308                         "by Florian octo Forster <octo@verplant.org>\n"
 309                         "for contributions see `AUTHORS'\n",
 310                         name);
 311         exit (status);
 312 } /* }}} void usage_exit */
 313
 314 __attribute__((noreturn))
 315 static void usage_qos_exit (const char *arg, int status) /* {{{ */
 316 {
 317         if (arg != 0)
 318                 fprintf (stderr, "Invalid QoS argument: \"%s\"\n\n", arg);
 319
 320         fprintf (stderr, "Valid QoS arguments (option \"-Q\") are:\n"
 321                         "\n"
 322                         "  Differentiated Services (IPv4 and IPv6, RFC 2474)\n"
 323                         "\n"
 324                         "    be                     Best Effort (BE, default PHB).\n"
 325                         "    ef                     Expedited Forwarding (EF) PHB group (RFC 3246).\n"
 326                         "                           (low delay, low loss, low jitter)\n"
 327                         "    va                     Voice Admit (VA) DSCP (RFC 5865).\n"
 328                         "                           (capacity-admitted traffic)\n"
 329                         "    af[1-4][1-3]           Assured Forwarding (AF) PHB group (RFC 2597).\n"
 330                         "                           For example: \"af12\" (class 1, precedence 2)\n"
 331                         "    cs[0-7]                Class Selector (CS) PHB group (RFC 2474).\n"
 332                         "                           For example: \"cs1\" (priority traffic)\n"
 333                         "\n"
 334                         "  Type of Service (IPv4, RFC 1349, obsolete)\n"
 335                         "\n"
 336                         "    lowdelay     (%#04x)    minimize delay\n"
 337                         "    throughput   (%#04x)    maximize throughput\n"
 338                         "    reliability  (%#04x)    maximize reliability\n"
 339                         "    mincost      (%#04x)    minimize monetary cost\n"
 340                         "\n"
 341                         "  Specify manually\n"
 342                         "\n"
 343                         "    0x00 - 0xff            Hexadecimal numeric specification.\n"
 344                         "       0 -  255            Decimal numeric specification.\n"
 345                         "\n",
 346                         (unsigned int) IPTOS_LOWDELAY,
 347                         (unsigned int) IPTOS_THROUGHPUT,
 348                         (unsigned int) IPTOS_RELIABILITY,
 349                         (unsigned int) IPTOS_MINCOST);
 350
 351         exit (status);
 352 } /* }}} void usage_qos_exit */
 353
 354 static int set_opt_send_qos (const char *opt) /* {{{ */
 355 {
 356         if (opt == NULL)
 357                 return (EINVAL);
 358
 359         if (strcasecmp ("help", opt) == 0)
 360                 usage_qos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
 361         /* DiffServ (RFC 2474): */
 362         /* - Best effort (BE) */
 363         else if (strcasecmp ("be", opt) == 0)
 364                 opt_send_qos = 0;
 365         /* - Expedited Forwarding (EF, RFC 3246) */
 366         else if (strcasecmp ("ef", opt) == 0)
 367                 opt_send_qos = 0xB8; /* == 0x2E << 2 */
 368         /* - Voice Admit (VA, RFC 5865) */
 369         else if (strcasecmp ("va", opt) == 0)
 370                 opt_send_qos = 0xB0; /* == 0x2D << 2 */
 371         /* - Assured Forwarding (AF, RFC 2597) */
 372         else if ((strncasecmp ("af", opt, strlen ("af")) == 0)
 373                         && (strlen (opt) == 4))
 374         {
 375                 uint8_t dscp;
 376                 uint8_t class = 0;
 377                 uint8_t prec = 0;
 378
 379                 /* There are four classes, AF1x, AF2x, AF3x, and AF4x. */
 380                 if (opt[2] == '1')
 381                         class = 1;
 382                 else if (opt[2] == '2')
 383                         class = 2;
 384                 else if (opt[2] == '3')
 385                         class = 3;
 386                 else if (opt[2] == '4')
 387                         class = 4;
 388                 else
 389                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 390
 391                 /* In each class, there are three precedences, AFx1, AFx2, and AFx3 */
 392                 if (opt[3] == '1')
 393                         prec = 1;
 394                 else if (opt[3] == '2')
 395                         prec = 2;
 396                 else if (opt[3] == '3')
 397                         prec = 3;
 398                 else
 399                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 400
 401                 dscp = (8 * class) + (2 * prec);
 402                 /* The lower two bits are used for Explicit Congestion Notification (ECN) */
 403                 opt_send_qos = dscp << 2;
 404         }
 405         /* - Class Selector (CS) */
 406         else if ((strncasecmp ("cs", opt, strlen ("cs")) == 0)
 407                         && (strlen (opt) == 3))
 408         {
 409                 uint8_t class;
 410
 411                 if ((opt[2] < '0') || (opt[2] > '7'))
 412                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 413
 414                 /* Not exactly legal by the C standard, but I don't know of any
 415                  * system not supporting this hack. */
 416                 class = ((uint8_t) opt[2]) - ((uint8_t) '0');
 417                 opt_send_qos = class << 5;
 418         }
 419         /* Type of Service (RFC 1349) */
 420         else if (strcasecmp ("lowdelay", opt) == 0)
 421                 opt_send_qos = IPTOS_LOWDELAY;
 422         else if (strcasecmp ("throughput", opt) == 0)
 423                 opt_send_qos = IPTOS_THROUGHPUT;
 424         else if (strcasecmp ("reliability", opt) == 0)
 425                 opt_send_qos = IPTOS_RELIABILITY;
 426         else if (strcasecmp ("mincost", opt) == 0)
 427                 opt_send_qos = IPTOS_MINCOST;
 428         /* Numeric value */
 429         else
 430         {
 431                 unsigned long value;
 432                 char *endptr;
 433
 434                 errno = 0;
 435                 endptr = NULL;
 436                 value = strtoul (opt, &endptr, /* base = */ 0);
 437                 if ((errno != 0) || (endptr == opt)
 438                                 || (endptr == NULL) || (*endptr != 0)
 439                                 || (value > 0xff))
 440                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 441
 442                 opt_send_qos = (uint8_t) value;
 443         }
 444
 445         return (0);
 446 } /* }}} int set_opt_send_qos */
 447
 448 static char *format_qos (uint8_t qos, char *buffer, size_t buffer_size) /* {{{ */
 449 {
 450         uint8_t dscp;
 451         uint8_t ecn;
 452         char *dscp_str;
 453         char *ecn_str;
 454
 455         dscp = qos >> 2;
 456         ecn = qos & 0x03;
 457
 458         switch (dscp)
 459         {
 460                 case 0x00: dscp_str = "be";  break;
 461                 case 0x2e: dscp_str = "ef";  break;
 462                 case 0x2d: dscp_str = "va";  break;
 463                 case 0x0a: dscp_str = "af11"; break;
 464                 case 0x0c: dscp_str = "af12"; break;
 465                 case 0x0e: dscp_str = "af13"; break;
 466                 case 0x12: dscp_str = "af21"; break;
 467                 case 0x14: dscp_str = "af22"; break;
 468                 case 0x16: dscp_str = "af23"; break;
 469                 case 0x1a: dscp_str = "af31"; break;
 470                 case 0x1c: dscp_str = "af32"; break;
 471                 case 0x1e: dscp_str = "af33"; break;
 472                 case 0x22: dscp_str = "af41"; break;
 473                 case 0x24: dscp_str = "af42"; break;
 474                 case 0x26: dscp_str = "af43"; break;
 475                 case 0x08: dscp_str = "cs1";  break;
 476                 case 0x10: dscp_str = "cs2";  break;
 477                 case 0x18: dscp_str = "cs3";  break;
 478                 case 0x20: dscp_str = "cs4";  break;
 479                 case 0x28: dscp_str = "cs5";  break;
 480                 case 0x30: dscp_str = "cs6";  break;
 481                 case 0x38: dscp_str = "cs7";  break;
 482                 default:   dscp_str = NULL;
 483         }
 484
 485         switch (ecn)
 486         {
 487                 case 0x01: ecn_str = ",ecn(1)"; break;
 488                 case 0x02: ecn_str = ",ecn(0)"; break;
 489                 case 0x03: ecn_str = ",ce"; break;
 490                 default:   ecn_str = "";
 491         }
 492
 493         if (dscp_str == NULL)
 494                 snprintf (buffer, buffer_size, "0x%02x%s", dscp, ecn_str);
 495         else
 496                 snprintf (buffer, buffer_size, "%s%s", dscp_str, ecn_str);
 497         buffer[buffer_size - 1] = 0;
 498
 499         return (buffer);
 500 } /* }}} char *format_qos */
 501
 502 static int read_options (int argc, char **argv) /* {{{ */
 503 {
 504         int optchar;
 505
 506         while (1)
 507         {
 508                 optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:");
 509
 510                 if (optchar == -1)
 511                         break;
 512
 513                 switch (optchar)
 514                 {
 515                         case '4':
 516                         case '6':
 517                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 518                                 break;
 519
 520                         case 'c':
 521                                 {
 522                                         int new_count;
 523                                         new_count = atoi (optarg);
 524                                         if (new_count > 0)
 525                                                 opt_count = new_count;
 526                                         else
 527                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 528                                                                 optarg);
 529                                 }
 530                                 break;
 531
 532                         case 'f':
 533                                 {
 534                                         if (opt_filename != NULL)
 535                                                 free (opt_filename);
 536                                         opt_filename = strdup (optarg);
 537                                 }
 538                                 break;
 539
 540                         case 'i':
 541                                 {
 542                                         double new_interval;
 543                                         new_interval = atof (optarg);
 544                                         if (new_interval < 0.001)
 545                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 546                                                                 optarg);
 547                                         else
 548                                                 opt_interval = new_interval;
 549                                 }
 550                                 break;
 551                         case 'I':
 552                                 {
 553                                         if (opt_srcaddr != NULL)
 554                                                 free (opt_srcaddr);
 555                                         opt_srcaddr = strdup (optarg);
 556                                 }
 557                                 break;
 558
 559                         case 'D':
 560                                 opt_device = optarg;
 561                                 break;
 562
 563                         case 't':
 564                         {
 565                                 int new_send_ttl;
 566                                 new_send_ttl = atoi (optarg);
 567                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 568                                         opt_send_ttl = new_send_ttl;
 569                                 else
 570                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 571                                                         optarg);
 572                                 break;
 573                         }
 574
 575                         case 'Q':
 576                                 set_opt_send_qos (optarg);
 577                                 break;
 578
 579                         case 'h':
 580                                 usage_exit (argv[0], 0);
 581                                 break;
 582                         default:
 583                                 usage_exit (argv[0], 1);
 584                 }
 585         }
 586
 587         return (optind);
 588 } /* }}} read_options */
 589
 590 static void time_normalize (struct timespec *ts) /* {{{ */
 591 {
 592         while (ts->tv_nsec < 0)
 593         {
 594                 if (ts->tv_sec == 0)
 595                 {
 596                         ts->tv_nsec = 0;
 597                         return;
 598                 }
 599
 600                 ts->tv_sec  -= 1;
 601                 ts->tv_nsec += 1000000000;
 602         }
 603
 604         while (ts->tv_nsec >= 1000000000)
 605         {
 606                 ts->tv_sec  += 1;
 607                 ts->tv_nsec -= 1000000000;
 608         }
 609 } /* }}} void time_normalize */
 610
 611 static void time_calc (struct timespec *ts_dest, /* {{{ */
 612                 const struct timespec *ts_int,
 613                 const struct timeval  *tv_begin,
 614                 const struct timeval  *tv_end)
 615 {
 616         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 617         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 618         time_normalize (ts_dest);
 619
 620         /* Assure that `(begin + interval) > end'.
 621          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 622          * which may be `unsigned. *sigh* */
 623         if ((tv_end->tv_sec > ts_dest->tv_sec)
 624                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 625                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 626         {
 627                 ts_dest->tv_sec  = 0;
 628                 ts_dest->tv_nsec = 0;
 629                 return;
 630         }
 631
 632         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 633         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 634         time_normalize (ts_dest);
 635 } /* }}} void time_calc */
 636
 637 #if USE_NCURSES
 638 static int unicode_locale() /* {{{ */
 639 {
 640         return _nc_unicode_locale();
 641 } /* }}} int unicode_locale */
 642
 643 static int update_prettyping_graph (ping_context_t *ctx, /* {{{ */
 644                 double latency, unsigned int sequence)
 645 {
 646         int color = OPING_RED;
 647         char const *symbol = "!";
 648         int symbolc = '!';
 649         size_t hist_symbols_num;
 650         size_t index_symbols;
 651
 652         int x_max;
 653         int x_pos;
 654
 655         x_max = getmaxx (ctx->window);
 656         x_pos = ((sequence - 1) % (x_max - 4)) + 2;
 657
 658         if (unicode_locale())
 659         {
 660                 hist_symbols_num = hist_symbols_utf8_num;
 661         }
 662         else {
 663                 hist_symbols_num = hist_symbols_acs_num;
 664         }
 665
 666         if (latency >= 0.0)
 667         {
 668                 double ratio;
 669                 size_t intensity;
 670                 size_t index_colors;
 671
 672                 ratio = latency / PING_DEF_TTL;
 673                 if (ratio > 1) {
 674                         ratio = 1.0;
 675                 }
 676
 677                 intensity = (size_t) ((ratio * hist_symbols_num
 678                                         * hist_colors_num) - 1);
 679
 680                 index_colors = intensity / hist_symbols_num;
 681                 assert (index_colors < hist_colors_num);
 682
 683                 index_symbols = intensity % hist_symbols_num;
 684                 if (unicode_locale())
 685                 {
 686                         color = hist_colors_utf8[index_colors];
 687                         symbol = hist_symbols_utf8[index_symbols];
 688                 }
 689                 else
 690                 {
 691                         color = hist_colors_acs[index_colors];
 692                         symbolc = hist_symbols_acs[index_symbols] | A_ALTCHARSET;
 693                 }
 694         }
 695         else /* if (!(latency >= 0.0)) */
 696                 wattron (ctx->window, A_BOLD);
 697
 698         wattron (ctx->window, COLOR_PAIR(color));
 699         if (unicode_locale())
 700         {
 701                 mvwprintw (ctx->window,
 702                            /* y = */ 3,
 703                            /* x = */ x_pos,
 704                            symbol);
 705         }
 706         else {
 707                 mvwaddch (ctx->window,
 708                           /* y = */ 3,
 709                           /* x = */ x_pos,
 710                           symbolc);
 711         }
 712         wattroff (ctx->window, COLOR_PAIR(color));
 713
 714         /* Use negation here to handle NaN correctly. */
 715         if (!(latency >= 0.0))
 716                 wattroff (ctx->window, A_BOLD);
 717
 718         wprintw (ctx->window, " ");
 719         return (0);
 720 } /* }}} int update_prettyping_graph */
 721
 722 static int update_stats_from_context (ping_context_t *ctx, pingobj_iter_t *iter) /* {{{ */
 723 {
 724         double latency = -1.0;
 725         size_t buffer_len = sizeof (latency);
 726
 727         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 728                         &latency, &buffer_len);
 729
 730         unsigned int sequence = 0;
 731         buffer_len = sizeof (sequence);
 732         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 733                         &sequence, &buffer_len);
 734
 735
 736         if ((ctx == NULL) || (ctx->window == NULL))
 737                 return (EINVAL);
 738
 739         /* werase (ctx->window); */
 740
 741         box (ctx->window, 0, 0);
 742         wattron (ctx->window, A_BOLD);
 743         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 744                         " %s ", ctx->host);
 745         wattroff (ctx->window, A_BOLD);
 746         wprintw (ctx->window, "ping statistics ");
 747         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 748                         "%i packets transmitted, %i received, %.2f%% packet "
 749                         "loss, time %.1fms",
 750                         ctx->req_sent, ctx->req_rcvd,
 751                         context_get_packet_loss (ctx),
 752                         ctx->latency_total);
 753         if (ctx->req_rcvd != 0)
 754         {
 755                 double average;
 756                 double deviation;
 757
 758                 average = context_get_average (ctx);
 759                 deviation = context_get_stddev (ctx);
 760
 761                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 762                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 763                                 ctx->latency_min,
 764                                 average,
 765                                 ctx->latency_max,
 766                                 deviation);
 767         }
 768
 769         if (has_colors () == TRUE)
 770                 update_prettyping_graph (ctx, latency, sequence);
 771
 772         wrefresh (ctx->window);
 773
 774         return (0);
 775 } /* }}} int update_stats_from_context */
 776
 777 static int on_resize (pingobj_t *ping) /* {{{ */
 778 {
 779         pingobj_iter_t *iter;
 780         int width = 0;
 781         int height = 0;
 782         int main_win_height;
 783
 784         getmaxyx (stdscr, height, width);
 785         if ((height < 1) || (width < 1))
 786                 return (EINVAL);
 787
 788         main_win_height = height - (5 * host_num);
 789         wresize (main_win, main_win_height, /* width = */ width);
 790         /* Allow scrolling */
 791         scrollok (main_win, TRUE);
 792         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 793         /* Allow hardware accelerated scrolling. */
 794         idlok (main_win, TRUE);
 795         wrefresh (main_win);
 796
 797         for (iter = ping_iterator_get (ping);
 798                         iter != NULL;
 799                         iter = ping_iterator_next (iter))
 800         {
 801                 ping_context_t *context;
 802
 803                 context = ping_iterator_get_context (iter);
 804                 if (context == NULL)
 805                         continue;
 806
 807                 if (context->window != NULL)
 808                 {
 809                         delwin (context->window);
 810                         context->window = NULL;
 811                 }
 812                 context->window = newwin (/* height = */ 5,
 813                                 /* width = */ width,
 814                                 /* y = */ main_win_height + (5 * context->index),
 815                                 /* x = */ 0);
 816         }
 817
 818         return (0);
 819 } /* }}} */
 820
 821 static int check_resize (pingobj_t *ping) /* {{{ */
 822 {
 823         int need_resize = 0;
 824
 825         while (42)
 826         {
 827                 int key = wgetch (stdscr);
 828                 if (key == ERR)
 829                         break;
 830                 else if (key == KEY_RESIZE)
 831                         need_resize = 1;
 832         }
 833
 834         if (need_resize)
 835                 return (on_resize (ping));
 836         else
 837                 return (0);
 838 } /* }}} int check_resize */
 839
 840 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 841 {
 842         pingobj_iter_t *iter;
 843         int width = 0;
 844         int height = 0;
 845         int main_win_height;
 846
 847         initscr ();
 848         cbreak ();
 849         noecho ();
 850         nodelay (stdscr, TRUE);
 851
 852         getmaxyx (stdscr, height, width);
 853         if ((height < 1) || (width < 1))
 854                 return (EINVAL);
 855
 856         if (has_colors () == TRUE)
 857         {
 858                 start_color ();
 859                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 860                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 861                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 862                 init_pair (OPING_GREEN_HIST,  COLOR_GREEN,  COLOR_BLACK);
 863                 init_pair (OPING_YELLOW_HIST, COLOR_YELLOW, COLOR_GREEN);
 864                 init_pair (OPING_RED_HIST,    COLOR_RED,    COLOR_YELLOW);
 865         }
 866
 867         main_win_height = height - (5 * host_num);
 868         main_win = newwin (/* height = */ main_win_height,
 869                         /* width = */ width,
 870                         /* y = */ 0, /* x = */ 0);
 871         /* Allow scrolling */
 872         scrollok (main_win, TRUE);
 873         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 874         /* Allow hardware accelerated scrolling. */
 875         idlok (main_win, TRUE);
 876         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
 877         wrefresh (main_win);
 878
 879         for (iter = ping_iterator_get (ping);
 880                         iter != NULL;
 881                         iter = ping_iterator_next (iter))
 882         {
 883                 ping_context_t *context;
 884
 885                 context = ping_iterator_get_context (iter);
 886                 if (context == NULL)
 887                         continue;
 888
 889                 if (context->window != NULL)
 890                 {
 891                         delwin (context->window);
 892                         context->window = NULL;
 893                 }
 894                 context->window = newwin (/* height = */ 5,
 895                                 /* width = */ width,
 896                                 /* y = */ main_win_height + (5 * context->index),
 897                                 /* x = */ 0);
 898         }
 899
 900
 901         /* Don't know what good this does exactly, but without this code
 902          * "check_resize" will be called right after startup and *somehow*
 903          * this leads to display errors. If we purge all initial characters
 904          * here, the problem goes away. "wgetch" is non-blocking due to
 905          * "nodelay" (see above). */
 906         while (wgetch (stdscr) != ERR)
 907         {
 908                 /* eat up characters */;
 909         }
 910
 911         return (0);
 912 } /* }}} int pre_loop_hook */
 913
 914 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
 915 {
 916         return (check_resize (ping));
 917 } /* }}} int pre_sleep_hook */
 918
 919 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
 920 {
 921         return (check_resize (ping));
 922 } /* }}} int pre_sleep_hook */
 923 #else /* if !USE_NCURSES */
 924 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 925 {
 926         pingobj_iter_t *iter;
 927
 928         for (iter = ping_iterator_get (ping);
 929                         iter != NULL;
 930                         iter = ping_iterator_next (iter))
 931         {
 932                 ping_context_t *ctx;
 933                 size_t buffer_size;
 934
 935                 ctx = ping_iterator_get_context (iter);
 936                 if (ctx == NULL)
 937                         continue;
 938
 939                 buffer_size = 0;
 940                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 941
 942                 printf ("PING %s (%s) %zu bytes of data.\n",
 943                                 ctx->host, ctx->addr, buffer_size);
 944         }
 945
 946         return (0);
 947 } /* }}} int pre_loop_hook */
 948
 949 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 950 {
 951         fflush (stdout);
 952
 953         return (0);
 954 } /* }}} int pre_sleep_hook */
 955
 956 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 957 {
 958         return (0);
 959 } /* }}} int post_sleep_hook */
 960 #endif
 961
 962 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
 963                 __attribute__((unused)) int index)
 964 {
 965         double          latency;
 966         unsigned int    sequence;
 967         int             recv_ttl;
 968         uint8_t         recv_qos;
 969         char            recv_qos_str[16];
 970         size_t          buffer_len;
 971         size_t          data_len;
 972         ping_context_t *context;
 973
 974         latency = -1.0;
 975         buffer_len = sizeof (latency);
 976         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 977                         &latency, &buffer_len);
 978
 979         sequence = 0;
 980         buffer_len = sizeof (sequence);
 981         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 982                         &sequence, &buffer_len);
 983
 984         recv_ttl = -1;
 985         buffer_len = sizeof (recv_ttl);
 986         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 987                         &recv_ttl, &buffer_len);
 988
 989         recv_qos = 0;
 990         buffer_len = sizeof (recv_qos);
 991         ping_iterator_get_info (iter, PING_INFO_RECV_QOS,
 992                         &recv_qos, &buffer_len);
 993
 994         data_len = 0;
 995         ping_iterator_get_info (iter, PING_INFO_DATA,
 996                         NULL, &data_len);
 997
 998         context = (ping_context_t *) ping_iterator_get_context (iter);
 999
1000 #if USE_NCURSES
1001 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
1002 #else
1003 # define HOST_PRINTF(...) printf(__VA_ARGS__)
1004 #endif
1005
1006         context->req_sent++;
1007         if (latency > 0.0)
1008         {
1009                 context->req_rcvd++;
1010                 context->latency_total += latency;
1011                 context->latency_total_square += (latency * latency);
1012
1013                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
1014                         context->latency_max = latency;
1015                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
1016                         context->latency_min = latency;
1017
1018 #if USE_NCURSES
1019                 if (has_colors () == TRUE)
1020                 {
1021                         int color = OPING_GREEN;
1022                         double average = context_get_average (context);
1023                         double stddev = context_get_stddev (context);
1024
1025                         if ((latency < (average - (2 * stddev)))
1026                                         || (latency > (average + (2 * stddev))))
1027                                 color = OPING_RED;
1028                         else if ((latency < (average - stddev))
1029                                         || (latency > (average + stddev)))
1030                                 color = OPING_YELLOW;
1031
1032                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
1033                                         data_len, context->host, context->addr,
1034                                         sequence, recv_ttl,
1035                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1036                         if ((recv_qos != 0) || (opt_send_qos != 0))
1037                         {
1038                                 HOST_PRINTF ("qos=%s ",
1039                                                 format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1040                         }
1041                         HOST_PRINTF ("time=");
1042                         wattron (main_win, COLOR_PAIR(color));
1043                         HOST_PRINTF ("%.2f", latency);
1044                         wattroff (main_win, COLOR_PAIR(color));
1045                         HOST_PRINTF (" ms\n");
1046                 }
1047                 else
1048                 {
1049 #endif
1050                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
1051                                 data_len,
1052                                 context->host, context->addr,
1053                                 sequence, recv_ttl);
1054                 if ((recv_qos != 0) || (opt_send_qos != 0))
1055                 {
1056                         HOST_PRINTF ("qos=%s ",
1057                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1058                 }
1059                 HOST_PRINTF ("time=%.2f ms\n", latency);
1060 #if USE_NCURSES
1061                 }
1062 #endif
1063         }
1064         else
1065         {
1066 #if USE_NCURSES
1067                 if (has_colors () == TRUE)
1068                 {
1069                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
1070                                         context->host, context->addr,
1071                                         sequence);
1072                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
1073                         HOST_PRINTF ("timeout");
1074                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
1075                         HOST_PRINTF ("\n");
1076                 }
1077                 else
1078                 {
1079 #endif
1080                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
1081                                 context->host, context->addr,
1082                                 sequence);
1083 #if USE_NCURSES
1084                 }
1085 #endif
1086         }
1087
1088 #if USE_NCURSES
1089         update_stats_from_context (context, iter);
1090         wrefresh (main_win);
1091 #endif
1092 } /* }}} void update_host_hook */
1093
1094 static int post_loop_hook (pingobj_t *ping) /* {{{ */
1095 {
1096         pingobj_iter_t *iter;
1097
1098 #if USE_NCURSES
1099         endwin ();
1100 #endif
1101
1102         for (iter = ping_iterator_get (ping);
1103                         iter != NULL;
1104                         iter = ping_iterator_next (iter))
1105         {
1106                 ping_context_t *context;
1107
1108                 context = ping_iterator_get_context (iter);
1109
1110                 printf ("\n--- %s ping statistics ---\n"
1111                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
1112                                 context->host, context->req_sent, context->req_rcvd,
1113                                 context_get_packet_loss (context),
1114                                 context->latency_total);
1115
1116                 if (context->req_rcvd != 0)
1117                 {
1118                         double average;
1119                         double deviation;
1120
1121                         average = context_get_average (context);
1122                         deviation = context_get_stddev (context);
1123
1124                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
1125                                         context->latency_min,
1126                                         average,
1127                                         context->latency_max,
1128                                         deviation);
1129                 }
1130
1131                 ping_iterator_set_context (iter, NULL);
1132                 context_destroy (context);
1133         }
1134
1135         return (0);
1136 } /* }}} int post_loop_hook */
1137
1138 int main (int argc, char **argv) /* {{{ */
1139 {
1140         pingobj_t      *ping;
1141         pingobj_iter_t *iter;
1142
1143         struct sigaction sigint_action;
1144
1145         struct timeval  tv_begin;
1146         struct timeval  tv_end;
1147         struct timespec ts_wait;
1148         struct timespec ts_int;
1149
1150         int optind;
1151         int i;
1152         int status;
1153 #if _POSIX_SAVED_IDS
1154         uid_t saved_set_uid;
1155
1156         /* Save the old effective user id */
1157         saved_set_uid = geteuid ();
1158         /* Set the effective user ID to the real user ID without changing the
1159          * saved set-user ID */
1160         status = seteuid (getuid ());
1161         if (status != 0)
1162         {
1163                 fprintf (stderr, "Temporarily dropping privileges "
1164                                 "failed: %s\n", strerror (errno));
1165                 exit (EXIT_FAILURE);
1166         }
1167 #endif
1168
1169         setlocale(LC_ALL, "");
1170         optind = read_options (argc, argv);
1171
1172 #if !_POSIX_SAVED_IDS
1173         /* Cannot temporarily drop privileges -> reject every file but "-". */
1174         if ((opt_filename != NULL)
1175                         && (strcmp ("-", opt_filename) != 0)
1176                         && (getuid () != geteuid ()))
1177         {
1178                 fprintf (stderr, "Your real and effective user IDs don't "
1179                                 "match. Reading from a file (option '-f')\n"
1180                                 "is therefore too risky. You can still read "
1181                                 "from STDIN using '-f -' if you like.\n"
1182                                 "Sorry.\n");
1183                 exit (EXIT_FAILURE);
1184         }
1185 #endif
1186
1187         if ((optind >= argc) && (opt_filename == NULL)) {
1188                 usage_exit (argv[0], 1);
1189         }
1190
1191         if ((ping = ping_construct ()) == NULL)
1192         {
1193                 fprintf (stderr, "ping_construct failed\n");
1194                 return (1);
1195         }
1196
1197         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
1198         {
1199                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
1200                                 opt_send_ttl, ping_get_error (ping));
1201         }
1202
1203         if (ping_setopt (ping, PING_OPT_QOS, &opt_send_qos) != 0)
1204         {
1205                 fprintf (stderr, "Setting TOS to %i failed: %s\n",
1206                                 opt_send_qos, ping_get_error (ping));
1207         }
1208
1209         {
1210                 double temp_sec;
1211                 double temp_nsec;
1212
1213                 temp_nsec = modf (opt_interval, &temp_sec);
1214                 ts_int.tv_sec  = (time_t) temp_sec;
1215                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
1216
1217                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
1218         }
1219
1220         if (opt_addrfamily != PING_DEF_AF)
1221                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
1222
1223         if (opt_srcaddr != NULL)
1224         {
1225                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
1226                 {
1227                         fprintf (stderr, "Setting source address failed: %s\n",
1228                                         ping_get_error (ping));
1229                 }
1230         }
1231
1232         if (opt_device != NULL)
1233         {
1234                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
1235                 {
1236                         fprintf (stderr, "Setting device failed: %s\n",
1237                                         ping_get_error (ping));
1238                 }
1239         }
1240
1241         if (opt_filename != NULL)
1242         {
1243                 FILE *infile;
1244                 char line[256];
1245                 char host[256];
1246
1247                 if (strcmp (opt_filename, "-") == 0)
1248                         /* Open STDIN */
1249                         infile = fdopen(0, "r");
1250                 else
1251                         infile = fopen(opt_filename, "r");
1252
1253                 if (infile == NULL)
1254                 {
1255                         fprintf (stderr, "Opening %s failed: %s\n",
1256                                         (strcmp (opt_filename, "-") == 0)
1257                                         ? "STDIN" : opt_filename,
1258                                         strerror(errno));
1259                         return (1);
1260                 }
1261
1262 #if _POSIX_SAVED_IDS
1263                 /* Regain privileges */
1264                 status = seteuid (saved_set_uid);
1265                 if (status != 0)
1266                 {
1267                         fprintf (stderr, "Temporarily re-gaining privileges "
1268                                         "failed: %s\n", strerror (errno));
1269                         exit (EXIT_FAILURE);
1270                 }
1271 #endif
1272
1273                 while (fgets(line, sizeof(line), infile))
1274                 {
1275                         /* Strip whitespace */
1276                         if (sscanf(line, "%s", host) != 1)
1277                                 continue;
1278
1279                         if ((host[0] == 0) || (host[0] == '#'))
1280                                 continue;
1281
1282                         if (ping_host_add(ping, host) < 0)
1283                         {
1284                                 const char *errmsg = ping_get_error (ping);
1285
1286                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
1287                                 continue;
1288                         }
1289                         else
1290                         {
1291                                 host_num++;
1292                         }
1293                 }
1294
1295 #if _POSIX_SAVED_IDS
1296                 /* Drop privileges */
1297                 status = seteuid (getuid ());
1298                 if (status != 0)
1299                 {
1300                         fprintf (stderr, "Temporarily dropping privileges "
1301                                         "failed: %s\n", strerror (errno));
1302                         exit (EXIT_FAILURE);
1303                 }
1304 #endif
1305
1306                 fclose(infile);
1307         }
1308
1309 #if _POSIX_SAVED_IDS
1310         /* Regain privileges */
1311         status = seteuid (saved_set_uid);
1312         if (status != 0)
1313         {
1314                 fprintf (stderr, "Temporarily re-gaining privileges "
1315                                 "failed: %s\n", strerror (errno));
1316                 exit (EXIT_FAILURE);
1317         }
1318 #endif
1319
1320         for (i = optind; i < argc; i++)
1321         {
1322                 if (ping_host_add (ping, argv[i]) < 0)
1323                 {
1324                         const char *errmsg = ping_get_error (ping);
1325
1326                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
1327                         continue;
1328                 }
1329                 else
1330                 {
1331                         host_num++;
1332                 }
1333         }
1334
1335         /* Permanently drop root privileges if we're setuid-root. */
1336         status = setuid (getuid ());
1337         if (status != 0)
1338         {
1339                 fprintf (stderr, "Dropping privileges failed: %s\n",
1340                                 strerror (errno));
1341                 exit (EXIT_FAILURE);
1342         }
1343
1344 #if _POSIX_SAVED_IDS
1345         saved_set_uid = (uid_t) -1;
1346 #endif
1347
1348         ping_initialize_contexts (ping);
1349
1350         if (i == 0)
1351                 return (1);
1352
1353         memset (&sigint_action, '\0', sizeof (sigint_action));
1354         sigint_action.sa_handler = sigint_handler;
1355         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1356         {
1357                 perror ("sigaction");
1358                 return (1);
1359         }
1360
1361         pre_loop_hook (ping);
1362
1363         while (opt_count != 0)
1364         {
1365                 int index;
1366                 int status;
1367
1368                 if (gettimeofday (&tv_begin, NULL) < 0)
1369                 {
1370                         perror ("gettimeofday");
1371                         return (1);
1372                 }
1373
1374                 if (ping_send (ping) < 0)
1375                 {
1376                         fprintf (stderr, "ping_send failed: %s\n",
1377                                         ping_get_error (ping));
1378                         return (1);
1379                 }
1380
1381                 index = 0;
1382                 for (iter = ping_iterator_get (ping);
1383                                 iter != NULL;
1384                                 iter = ping_iterator_next (iter))
1385                 {
1386                         update_host_hook (iter, index);
1387                         index++;
1388                 }
1389
1390                 pre_sleep_hook (ping);
1391
1392                 /* Don't sleep in the last iteration */
1393                 if (opt_count == 1)
1394                         break;
1395
1396                 if (gettimeofday (&tv_end, NULL) < 0)
1397                 {
1398                         perror ("gettimeofday");
1399                         return (1);
1400                 }
1401
1402                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1403
1404                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1405                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1406                 {
1407                         if (errno != EINTR)
1408                         {
1409                                 perror ("nanosleep");
1410                                 break;
1411                         }
1412                         else if (opt_count == 0)
1413                         {
1414                                 /* sigint */
1415                                 break;
1416                         }
1417                 }
1418
1419                 post_sleep_hook (ping);
1420
1421                 if (opt_count > 0)
1422                         opt_count--;
1423         } /* while (opt_count != 0) */
1424
1425         post_loop_hook (ping);
1426
1427         ping_destroy (ping);
1428
1429         return (0);
1430 } /* }}} int main */
1431
1432 /* vim: set fdm=marker : */