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 #include <langinfo.h>
  79
  80 #if USE_NCURSES
  81 # define NCURSES_OPAQUE 1
  82 /* http://newsgroups.derkeiler.com/Archive/Rec/rec.games.roguelike.development/2010-09/msg00050.html */
  83 # define _X_OPEN_SOURCE_EXTENDED
  84 # include <ncursesw/ncurses.h>
  85
  86 # define OPING_GREEN 1
  87 # define OPING_YELLOW 2
  88 # define OPING_RED 3
  89 # define OPING_GREEN_HIST 4
  90 # define OPING_YELLOW_HIST 5
  91 # define OPING_RED_HIST 6
  92
  93 static char const * const hist_symbols_utf8[] = {
  94         "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█" };
  95 static size_t const hist_symbols_utf8_num = sizeof (hist_symbols_utf8)
  96         / sizeof (hist_symbols_utf8[0]);
  97
  98 /* scancodes for 6 levels of horizontal bars, ncurses-specific */
  99 /* those are not the usual constants because those are not constant */
 100 static int const hist_symbols_acs[] = {
 101         115, /* ACS_S9 "⎽" */
 102         114, /* ACS_S7 "⎼" */
 103         113, /* ACS_S5 "─" */
 104         112, /* ACS_S3 "⎻" */
 105         111  /* ACS_S1 "⎺" */
 106 };
 107 static size_t const hist_symbols_acs_num = sizeof (hist_symbols_acs)
 108         / sizeof (hist_symbols_acs[0]);
 109
 110 /* use different colors without a background for scancodes */
 111 static int const hist_colors_utf8[] = {
 112         OPING_GREEN_HIST, OPING_YELLOW_HIST, OPING_RED_HIST };
 113 static int const hist_colors_acs[] = {
 114         OPING_GREEN, OPING_YELLOW, OPING_RED };
 115 /* assuming that both arrays are the same size */
 116 static size_t const hist_colors_num = sizeof (hist_colors_utf8)
 117         / sizeof (hist_colors_utf8[0]);
 118 #endif
 119
 120 #include "oping.h"
 121
 122 #ifndef _POSIX_SAVED_IDS
 123 # define _POSIX_SAVED_IDS 0
 124 #endif
 125
 126 /* Remove GNU specific __attribute__ settings when using another compiler */
 127 #if !__GNUC__
 128 # define __attribute__(x) /**/
 129 #endif
 130
 131 typedef struct ping_context
 132 {
 133         char host[NI_MAXHOST];
 134         char addr[NI_MAXHOST];
 135
 136         int index;
 137         int req_sent;
 138         int req_rcvd;
 139
 140         double latency_min;
 141         double latency_max;
 142         double latency_total;
 143         double latency_total_square;
 144
 145 #if USE_NCURSES
 146         WINDOW *window;
 147 #endif
 148 } ping_context_t;
 149
 150 static double  opt_interval   = 1.0;
 151 static int     opt_addrfamily = PING_DEF_AF;
 152 static char   *opt_srcaddr    = NULL;
 153 static char   *opt_device     = NULL;
 154 static char   *opt_filename   = NULL;
 155 static int     opt_count      = -1;
 156 static int     opt_send_ttl   = 64;
 157 static uint8_t opt_send_qos   = 0;
 158 static int     opt_utf8       = 0;
 159
 160 static int host_num = 0;
 161
 162 #if USE_NCURSES
 163 static WINDOW *main_win = NULL;
 164 #endif
 165
 166 static void sigint_handler (int signal) /* {{{ */
 167 {
 168         /* Make compiler happy */
 169         signal = 0;
 170         /* Exit the loop */
 171         opt_count = 0;
 172 } /* }}} void sigint_handler */
 173
 174 static ping_context_t *context_create (void) /* {{{ */
 175 {
 176         ping_context_t *ret;
 177
 178         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 179                 return (NULL);
 180
 181         memset (ret, '\0', sizeof (ping_context_t));
 182
 183         ret->latency_min   = -1.0;
 184         ret->latency_max   = -1.0;
 185         ret->latency_total = 0.0;
 186         ret->latency_total_square = 0.0;
 187
 188 #if USE_NCURSES
 189         ret->window = NULL;
 190 #endif
 191
 192         return (ret);
 193 } /* }}} ping_context_t *context_create */
 194
 195 static void context_destroy (ping_context_t *context) /* {{{ */
 196 {
 197         if (context == NULL)
 198                 return;
 199
 200 #if USE_NCURSES
 201         if (context->window != NULL)
 202         {
 203                 delwin (context->window);
 204                 context->window = NULL;
 205         }
 206 #endif
 207
 208         free (context);
 209 } /* }}} void context_destroy */
 210
 211 static double context_get_average (ping_context_t *ctx) /* {{{ */
 212 {
 213         double num_total;
 214
 215         if (ctx == NULL)
 216                 return (-1.0);
 217
 218         if (ctx->req_rcvd < 1)
 219                 return (-0.0);
 220
 221         num_total = (double) ctx->req_rcvd;
 222         return (ctx->latency_total / num_total);
 223 } /* }}} double context_get_average */
 224
 225 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
 226 {
 227         double num_total;
 228
 229         if (ctx == NULL)
 230                 return (-1.0);
 231
 232         if (ctx->req_rcvd < 1)
 233                 return (-0.0);
 234         else if (ctx->req_rcvd < 2)
 235                 return (0.0);
 236
 237         num_total = (double) ctx->req_rcvd;
 238         return (sqrt (((num_total * ctx->latency_total_square)
 239                                         - (ctx->latency_total * ctx->latency_total))
 240                                 / (num_total * (num_total - 1.0))));
 241 } /* }}} double context_get_stddev */
 242
 243 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
 244 {
 245         if (ctx == NULL)
 246                 return (-1.0);
 247
 248         if (ctx->req_sent < 1)
 249                 return (0.0);
 250
 251         return (100.0 * (ctx->req_sent - ctx->req_rcvd)
 252                         / ((double) ctx->req_sent));
 253 } /* }}} double context_get_packet_loss */
 254
 255 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
 256 {
 257         pingobj_iter_t *iter;
 258         int index;
 259
 260         if (ping == NULL)
 261                 return (EINVAL);
 262
 263         index = 0;
 264         for (iter = ping_iterator_get (ping);
 265                         iter != NULL;
 266                         iter = ping_iterator_next (iter))
 267         {
 268                 ping_context_t *context;
 269                 size_t buffer_size;
 270
 271                 context = context_create ();
 272                 context->index = index;
 273
 274                 buffer_size = sizeof (context->host);
 275                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 276
 277                 buffer_size = sizeof (context->addr);
 278                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 279
 280                 ping_iterator_set_context (iter, (void *) context);
 281
 282                 index++;
 283         }
 284
 285         return (0);
 286 } /* }}} int ping_initialize_contexts */
 287
 288 static void usage_exit (const char *name, int status) /* {{{ */
 289 {
 290         fprintf (stderr, "Usage: %s [OPTIONS] "
 291                                 "-f filename | host [host [host ...]]\n"
 292
 293                         "\nAvailable options:\n"
 294                         "  -4|-6        force the use of IPv4 or IPv6\n"
 295                         "  -c count     number of ICMP packets to send\n"
 296                         "  -i interval  interval with which to send ICMP packets\n"
 297                         "  -t ttl       time to live for each ICMP packet\n"
 298                         "  -Q qos       Quality of Service (QoS) of outgoing packets\n"
 299                         "               Use \"-Q help\" for a list of valid options.\n"
 300                         "  -I srcaddr   source address\n"
 301                         "  -D device    outgoing interface name\n"
 302                         "  -f filename  filename to read hosts from\n"
 303
 304                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 305                         "by Florian octo Forster <octo@verplant.org>\n"
 306                         "for contributions see `AUTHORS'\n",
 307                         name);
 308         exit (status);
 309 } /* }}} void usage_exit */
 310
 311 __attribute__((noreturn))
 312 static void usage_qos_exit (const char *arg, int status) /* {{{ */
 313 {
 314         if (arg != 0)
 315                 fprintf (stderr, "Invalid QoS argument: \"%s\"\n\n", arg);
 316
 317         fprintf (stderr, "Valid QoS arguments (option \"-Q\") are:\n"
 318                         "\n"
 319                         "  Differentiated Services (IPv4 and IPv6, RFC 2474)\n"
 320                         "\n"
 321                         "    be                     Best Effort (BE, default PHB).\n"
 322                         "    ef                     Expedited Forwarding (EF) PHB group (RFC 3246).\n"
 323                         "                           (low delay, low loss, low jitter)\n"
 324                         "    va                     Voice Admit (VA) DSCP (RFC 5865).\n"
 325                         "                           (capacity-admitted traffic)\n"
 326                         "    af[1-4][1-3]           Assured Forwarding (AF) PHB group (RFC 2597).\n"
 327                         "                           For example: \"af12\" (class 1, precedence 2)\n"
 328                         "    cs[0-7]                Class Selector (CS) PHB group (RFC 2474).\n"
 329                         "                           For example: \"cs1\" (priority traffic)\n"
 330                         "\n"
 331                         "  Type of Service (IPv4, RFC 1349, obsolete)\n"
 332                         "\n"
 333                         "    lowdelay     (%#04x)    minimize delay\n"
 334                         "    throughput   (%#04x)    maximize throughput\n"
 335                         "    reliability  (%#04x)    maximize reliability\n"
 336                         "    mincost      (%#04x)    minimize monetary cost\n"
 337                         "\n"
 338                         "  Specify manually\n"
 339                         "\n"
 340                         "    0x00 - 0xff            Hexadecimal numeric specification.\n"
 341                         "       0 -  255            Decimal numeric specification.\n"
 342                         "\n",
 343                         (unsigned int) IPTOS_LOWDELAY,
 344                         (unsigned int) IPTOS_THROUGHPUT,
 345                         (unsigned int) IPTOS_RELIABILITY,
 346                         (unsigned int) IPTOS_MINCOST);
 347
 348         exit (status);
 349 } /* }}} void usage_qos_exit */
 350
 351 static int set_opt_send_qos (const char *opt) /* {{{ */
 352 {
 353         if (opt == NULL)
 354                 return (EINVAL);
 355
 356         if (strcasecmp ("help", opt) == 0)
 357                 usage_qos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
 358         /* DiffServ (RFC 2474): */
 359         /* - Best effort (BE) */
 360         else if (strcasecmp ("be", opt) == 0)
 361                 opt_send_qos = 0;
 362         /* - Expedited Forwarding (EF, RFC 3246) */
 363         else if (strcasecmp ("ef", opt) == 0)
 364                 opt_send_qos = 0xB8; /* == 0x2E << 2 */
 365         /* - Voice Admit (VA, RFC 5865) */
 366         else if (strcasecmp ("va", opt) == 0)
 367                 opt_send_qos = 0xB0; /* == 0x2D << 2 */
 368         /* - Assured Forwarding (AF, RFC 2597) */
 369         else if ((strncasecmp ("af", opt, strlen ("af")) == 0)
 370                         && (strlen (opt) == 4))
 371         {
 372                 uint8_t dscp;
 373                 uint8_t class = 0;
 374                 uint8_t prec = 0;
 375
 376                 /* There are four classes, AF1x, AF2x, AF3x, and AF4x. */
 377                 if (opt[2] == '1')
 378                         class = 1;
 379                 else if (opt[2] == '2')
 380                         class = 2;
 381                 else if (opt[2] == '3')
 382                         class = 3;
 383                 else if (opt[2] == '4')
 384                         class = 4;
 385                 else
 386                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 387
 388                 /* In each class, there are three precedences, AFx1, AFx2, and AFx3 */
 389                 if (opt[3] == '1')
 390                         prec = 1;
 391                 else if (opt[3] == '2')
 392                         prec = 2;
 393                 else if (opt[3] == '3')
 394                         prec = 3;
 395                 else
 396                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
 397
 398                 dscp = (8 * class) + (2 * prec);
 399                 /* The lower two bits are used for Explicit Congestion Notification (ECN) */
 400                 opt_send_qos = dscp << 2;
 401         }
 402         /* - Class Selector (CS) */
 403         else if ((strncasecmp ("cs", opt, strlen ("cs")) == 0)
 404                         && (strlen (opt) == 3))
 405         {
 406                 uint8_t class;
 407
 408                 if ((opt[2] < '0') || (opt[2] > '7'))
 409                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 410
 411                 /* Not exactly legal by the C standard, but I don't know of any
 412                  * system not supporting this hack. */
 413                 class = ((uint8_t) opt[2]) - ((uint8_t) '0');
 414                 opt_send_qos = class << 5;
 415         }
 416         /* Type of Service (RFC 1349) */
 417         else if (strcasecmp ("lowdelay", opt) == 0)
 418                 opt_send_qos = IPTOS_LOWDELAY;
 419         else if (strcasecmp ("throughput", opt) == 0)
 420                 opt_send_qos = IPTOS_THROUGHPUT;
 421         else if (strcasecmp ("reliability", opt) == 0)
 422                 opt_send_qos = IPTOS_RELIABILITY;
 423         else if (strcasecmp ("mincost", opt) == 0)
 424                 opt_send_qos = IPTOS_MINCOST;
 425         /* Numeric value */
 426         else
 427         {
 428                 unsigned long value;
 429                 char *endptr;
 430
 431                 errno = 0;
 432                 endptr = NULL;
 433                 value = strtoul (opt, &endptr, /* base = */ 0);
 434                 if ((errno != 0) || (endptr == opt)
 435                                 || (endptr == NULL) || (*endptr != 0)
 436                                 || (value > 0xff))
 437                         usage_qos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
 438
 439                 opt_send_qos = (uint8_t) value;
 440         }
 441
 442         return (0);
 443 } /* }}} int set_opt_send_qos */
 444
 445 static char *format_qos (uint8_t qos, char *buffer, size_t buffer_size) /* {{{ */
 446 {
 447         uint8_t dscp;
 448         uint8_t ecn;
 449         char *dscp_str;
 450         char *ecn_str;
 451
 452         dscp = qos >> 2;
 453         ecn = qos & 0x03;
 454
 455         switch (dscp)
 456         {
 457                 case 0x00: dscp_str = "be";  break;
 458                 case 0x2e: dscp_str = "ef";  break;
 459                 case 0x2d: dscp_str = "va";  break;
 460                 case 0x0a: dscp_str = "af11"; break;
 461                 case 0x0c: dscp_str = "af12"; break;
 462                 case 0x0e: dscp_str = "af13"; break;
 463                 case 0x12: dscp_str = "af21"; break;
 464                 case 0x14: dscp_str = "af22"; break;
 465                 case 0x16: dscp_str = "af23"; break;
 466                 case 0x1a: dscp_str = "af31"; break;
 467                 case 0x1c: dscp_str = "af32"; break;
 468                 case 0x1e: dscp_str = "af33"; break;
 469                 case 0x22: dscp_str = "af41"; break;
 470                 case 0x24: dscp_str = "af42"; break;
 471                 case 0x26: dscp_str = "af43"; break;
 472                 case 0x08: dscp_str = "cs1";  break;
 473                 case 0x10: dscp_str = "cs2";  break;
 474                 case 0x18: dscp_str = "cs3";  break;
 475                 case 0x20: dscp_str = "cs4";  break;
 476                 case 0x28: dscp_str = "cs5";  break;
 477                 case 0x30: dscp_str = "cs6";  break;
 478                 case 0x38: dscp_str = "cs7";  break;
 479                 default:   dscp_str = NULL;
 480         }
 481
 482         switch (ecn)
 483         {
 484                 case 0x01: ecn_str = ",ecn(1)"; break;
 485                 case 0x02: ecn_str = ",ecn(0)"; break;
 486                 case 0x03: ecn_str = ",ce"; break;
 487                 default:   ecn_str = "";
 488         }
 489
 490         if (dscp_str == NULL)
 491                 snprintf (buffer, buffer_size, "0x%02x%s", dscp, ecn_str);
 492         else
 493                 snprintf (buffer, buffer_size, "%s%s", dscp_str, ecn_str);
 494         buffer[buffer_size - 1] = 0;
 495
 496         return (buffer);
 497 } /* }}} char *format_qos */
 498
 499 static int read_options (int argc, char **argv) /* {{{ */
 500 {
 501         int optchar;
 502
 503         while (1)
 504         {
 505                 optchar = getopt (argc, argv, "46uUc:hi:I:t:Q:f:D:");
 506
 507                 if (optchar == -1)
 508                         break;
 509
 510                 switch (optchar)
 511                 {
 512                         case '4':
 513                         case '6':
 514                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 515                                 break;
 516
 517                         case 'u':
 518                                 opt_utf8 = 2;
 519                                 break;
 520                         case 'U':
 521                                 opt_utf8 = 1;
 522                                 break;
 523
 524                         case 'c':
 525                                 {
 526                                         int new_count;
 527                                         new_count = atoi (optarg);
 528                                         if (new_count > 0)
 529                                                 opt_count = new_count;
 530                                         else
 531                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 532                                                                 optarg);
 533                                 }
 534                                 break;
 535
 536                         case 'f':
 537                                 {
 538                                         if (opt_filename != NULL)
 539                                                 free (opt_filename);
 540                                         opt_filename = strdup (optarg);
 541                                 }
 542                                 break;
 543
 544                         case 'i':
 545                                 {
 546                                         double new_interval;
 547                                         new_interval = atof (optarg);
 548                                         if (new_interval < 0.001)
 549                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 550                                                                 optarg);
 551                                         else
 552                                                 opt_interval = new_interval;
 553                                 }
 554                                 break;
 555                         case 'I':
 556                                 {
 557                                         if (opt_srcaddr != NULL)
 558                                                 free (opt_srcaddr);
 559                                         opt_srcaddr = strdup (optarg);
 560                                 }
 561                                 break;
 562
 563                         case 'D':
 564                                 opt_device = optarg;
 565                                 break;
 566
 567                         case 't':
 568                         {
 569                                 int new_send_ttl;
 570                                 new_send_ttl = atoi (optarg);
 571                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 572                                         opt_send_ttl = new_send_ttl;
 573                                 else
 574                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 575                                                         optarg);
 576                                 break;
 577                         }
 578
 579                         case 'Q':
 580                                 set_opt_send_qos (optarg);
 581                                 break;
 582
 583                         case 'h':
 584                                 usage_exit (argv[0], 0);
 585                                 break;
 586                         default:
 587                                 usage_exit (argv[0], 1);
 588                 }
 589         }
 590
 591         return (optind);
 592 } /* }}} read_options */
 593
 594 static void time_normalize (struct timespec *ts) /* {{{ */
 595 {
 596         while (ts->tv_nsec < 0)
 597         {
 598                 if (ts->tv_sec == 0)
 599                 {
 600                         ts->tv_nsec = 0;
 601                         return;
 602                 }
 603
 604                 ts->tv_sec  -= 1;
 605                 ts->tv_nsec += 1000000000;
 606         }
 607
 608         while (ts->tv_nsec >= 1000000000)
 609         {
 610                 ts->tv_sec  += 1;
 611                 ts->tv_nsec -= 1000000000;
 612         }
 613 } /* }}} void time_normalize */
 614
 615 static void time_calc (struct timespec *ts_dest, /* {{{ */
 616                 const struct timespec *ts_int,
 617                 const struct timeval  *tv_begin,
 618                 const struct timeval  *tv_end)
 619 {
 620         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 621         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 622         time_normalize (ts_dest);
 623
 624         /* Assure that `(begin + interval) > end'.
 625          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 626          * which may be `unsigned. *sigh* */
 627         if ((tv_end->tv_sec > ts_dest->tv_sec)
 628                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 629                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 630         {
 631                 ts_dest->tv_sec  = 0;
 632                 ts_dest->tv_nsec = 0;
 633                 return;
 634         }
 635
 636         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 637         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 638         time_normalize (ts_dest);
 639 } /* }}} void time_calc */
 640
 641 #if USE_NCURSES
 642 static _Bool has_utf8() /* {{{ */
 643 {
 644         if (!opt_utf8)
 645         {
 646                 /* Automatically determine */
 647                 if (strcasecmp ("UTF-8", nl_langinfo (CODESET)) == 0)
 648                         opt_utf8 = 2;
 649                 else
 650                         opt_utf8 = 1;
 651         }
 652         return ((_Bool) (opt_utf8 - 1));
 653 } /* }}} _Bool has_utf8 */
 654
 655 static int update_prettyping_graph (ping_context_t *ctx, /* {{{ */
 656                 double latency, unsigned int sequence)
 657 {
 658         int color = OPING_RED;
 659         char const *symbol = "!";
 660         int symbolc = '!';
 661         size_t hist_symbols_num;
 662         size_t index_symbols;
 663
 664         int x_max;
 665         int x_pos;
 666
 667         x_max = getmaxx (ctx->window);
 668         x_pos = ((sequence - 1) % (x_max - 4)) + 2;
 669
 670         if (has_utf8())
 671         {
 672                 hist_symbols_num = hist_symbols_utf8_num;
 673         }
 674         else {
 675                 hist_symbols_num = hist_symbols_acs_num;
 676         }
 677
 678         if (latency >= 0.0)
 679         {
 680                 double ratio;
 681                 size_t intensity;
 682                 size_t index_colors;
 683
 684                 ratio = latency / PING_DEF_TTL;
 685                 if (ratio > 1) {
 686                         ratio = 1.0;
 687                 }
 688
 689                 intensity = (size_t) ((ratio * hist_symbols_num
 690                                         * hist_colors_num) - 1);
 691
 692                 index_colors = intensity / hist_symbols_num;
 693                 assert (index_colors < hist_colors_num);
 694
 695                 index_symbols = intensity % hist_symbols_num;
 696                 if (has_utf8())
 697                 {
 698                         color = hist_colors_utf8[index_colors];
 699                         symbol = hist_symbols_utf8[index_symbols];
 700                 }
 701                 else
 702                 {
 703                         color = hist_colors_acs[index_colors];
 704                         symbolc = hist_symbols_acs[index_symbols] | A_ALTCHARSET;
 705                 }
 706         }
 707         else /* if (!(latency >= 0.0)) */
 708                 wattron (ctx->window, A_BOLD);
 709
 710         wattron (ctx->window, COLOR_PAIR(color));
 711         if (has_utf8())
 712         {
 713                 mvwprintw (ctx->window,
 714                            /* y = */ 3,
 715                            /* x = */ x_pos,
 716                            symbol);
 717         }
 718         else {
 719                 mvwaddch (ctx->window,
 720                           /* y = */ 3,
 721                           /* x = */ x_pos,
 722                           symbolc);
 723         }
 724         wattroff (ctx->window, COLOR_PAIR(color));
 725
 726         /* Use negation here to handle NaN correctly. */
 727         if (!(latency >= 0.0))
 728                 wattroff (ctx->window, A_BOLD);
 729
 730         wprintw (ctx->window, " ");
 731         return (0);
 732 } /* }}} int update_prettyping_graph */
 733
 734 static int update_stats_from_context (ping_context_t *ctx, pingobj_iter_t *iter) /* {{{ */
 735 {
 736         double latency = -1.0;
 737         size_t buffer_len = sizeof (latency);
 738
 739         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 740                         &latency, &buffer_len);
 741
 742         unsigned int sequence = 0;
 743         buffer_len = sizeof (sequence);
 744         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 745                         &sequence, &buffer_len);
 746
 747
 748         if ((ctx == NULL) || (ctx->window == NULL))
 749                 return (EINVAL);
 750
 751         /* werase (ctx->window); */
 752
 753         box (ctx->window, 0, 0);
 754         wattron (ctx->window, A_BOLD);
 755         mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
 756                         " %s ", ctx->host);
 757         wattroff (ctx->window, A_BOLD);
 758         wprintw (ctx->window, "ping statistics ");
 759         mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
 760                         "%i packets transmitted, %i received, %.2f%% packet "
 761                         "loss, time %.1fms",
 762                         ctx->req_sent, ctx->req_rcvd,
 763                         context_get_packet_loss (ctx),
 764                         ctx->latency_total);
 765         if (ctx->req_rcvd != 0)
 766         {
 767                 double average;
 768                 double deviation;
 769
 770                 average = context_get_average (ctx);
 771                 deviation = context_get_stddev (ctx);
 772
 773                 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
 774                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 775                                 ctx->latency_min,
 776                                 average,
 777                                 ctx->latency_max,
 778                                 deviation);
 779         }
 780
 781         if (has_colors () == TRUE)
 782                 update_prettyping_graph (ctx, latency, sequence);
 783
 784         wrefresh (ctx->window);
 785
 786         return (0);
 787 } /* }}} int update_stats_from_context */
 788
 789 static int on_resize (pingobj_t *ping) /* {{{ */
 790 {
 791         pingobj_iter_t *iter;
 792         int width = 0;
 793         int height = 0;
 794         int main_win_height;
 795
 796         getmaxyx (stdscr, height, width);
 797         if ((height < 1) || (width < 1))
 798                 return (EINVAL);
 799
 800         main_win_height = height - (5 * host_num);
 801         wresize (main_win, main_win_height, /* width = */ width);
 802         /* Allow scrolling */
 803         scrollok (main_win, TRUE);
 804         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 805         /* Allow hardware accelerated scrolling. */
 806         idlok (main_win, TRUE);
 807         wrefresh (main_win);
 808
 809         for (iter = ping_iterator_get (ping);
 810                         iter != NULL;
 811                         iter = ping_iterator_next (iter))
 812         {
 813                 ping_context_t *context;
 814
 815                 context = ping_iterator_get_context (iter);
 816                 if (context == NULL)
 817                         continue;
 818
 819                 if (context->window != NULL)
 820                 {
 821                         delwin (context->window);
 822                         context->window = NULL;
 823                 }
 824                 context->window = newwin (/* height = */ 5,
 825                                 /* width = */ width,
 826                                 /* y = */ main_win_height + (5 * context->index),
 827                                 /* x = */ 0);
 828         }
 829
 830         return (0);
 831 } /* }}} */
 832
 833 static int check_resize (pingobj_t *ping) /* {{{ */
 834 {
 835         int need_resize = 0;
 836
 837         while (42)
 838         {
 839                 int key = wgetch (stdscr);
 840                 if (key == ERR)
 841                         break;
 842                 else if (key == KEY_RESIZE)
 843                         need_resize = 1;
 844         }
 845
 846         if (need_resize)
 847                 return (on_resize (ping));
 848         else
 849                 return (0);
 850 } /* }}} int check_resize */
 851
 852 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 853 {
 854         pingobj_iter_t *iter;
 855         int width = 0;
 856         int height = 0;
 857         int main_win_height;
 858
 859         initscr ();
 860         cbreak ();
 861         noecho ();
 862         nodelay (stdscr, TRUE);
 863
 864         getmaxyx (stdscr, height, width);
 865         if ((height < 1) || (width < 1))
 866                 return (EINVAL);
 867
 868         if (has_colors () == TRUE)
 869         {
 870                 start_color ();
 871                 init_pair (OPING_GREEN,  COLOR_GREEN,  /* default = */ 0);
 872                 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
 873                 init_pair (OPING_RED,    COLOR_RED,    /* default = */ 0);
 874                 init_pair (OPING_GREEN_HIST,  COLOR_GREEN,  COLOR_BLACK);
 875                 init_pair (OPING_YELLOW_HIST, COLOR_YELLOW, COLOR_GREEN);
 876                 init_pair (OPING_RED_HIST,    COLOR_RED,    COLOR_YELLOW);
 877         }
 878
 879         main_win_height = height - (5 * host_num);
 880         main_win = newwin (/* height = */ main_win_height,
 881                         /* width = */ width,
 882                         /* y = */ 0, /* x = */ 0);
 883         /* Allow scrolling */
 884         scrollok (main_win, TRUE);
 885         /* wsetscrreg (main_win, 0, main_win_height - 1); */
 886         /* Allow hardware accelerated scrolling. */
 887         idlok (main_win, TRUE);
 888         wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
 889         wrefresh (main_win);
 890
 891         for (iter = ping_iterator_get (ping);
 892                         iter != NULL;
 893                         iter = ping_iterator_next (iter))
 894         {
 895                 ping_context_t *context;
 896
 897                 context = ping_iterator_get_context (iter);
 898                 if (context == NULL)
 899                         continue;
 900
 901                 if (context->window != NULL)
 902                 {
 903                         delwin (context->window);
 904                         context->window = NULL;
 905                 }
 906                 context->window = newwin (/* height = */ 5,
 907                                 /* width = */ width,
 908                                 /* y = */ main_win_height + (5 * context->index),
 909                                 /* x = */ 0);
 910         }
 911
 912
 913         /* Don't know what good this does exactly, but without this code
 914          * "check_resize" will be called right after startup and *somehow*
 915          * this leads to display errors. If we purge all initial characters
 916          * here, the problem goes away. "wgetch" is non-blocking due to
 917          * "nodelay" (see above). */
 918         while (wgetch (stdscr) != ERR)
 919         {
 920                 /* eat up characters */;
 921         }
 922
 923         return (0);
 924 } /* }}} int pre_loop_hook */
 925
 926 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
 927 {
 928         return (check_resize (ping));
 929 } /* }}} int pre_sleep_hook */
 930
 931 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
 932 {
 933         return (check_resize (ping));
 934 } /* }}} int pre_sleep_hook */
 935 #else /* if !USE_NCURSES */
 936 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
 937 {
 938         pingobj_iter_t *iter;
 939
 940         for (iter = ping_iterator_get (ping);
 941                         iter != NULL;
 942                         iter = ping_iterator_next (iter))
 943         {
 944                 ping_context_t *ctx;
 945                 size_t buffer_size;
 946
 947                 ctx = ping_iterator_get_context (iter);
 948                 if (ctx == NULL)
 949                         continue;
 950
 951                 buffer_size = 0;
 952                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 953
 954                 printf ("PING %s (%s) %zu bytes of data.\n",
 955                                 ctx->host, ctx->addr, buffer_size);
 956         }
 957
 958         return (0);
 959 } /* }}} int pre_loop_hook */
 960
 961 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 962 {
 963         fflush (stdout);
 964
 965         return (0);
 966 } /* }}} int pre_sleep_hook */
 967
 968 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
 969 {
 970         return (0);
 971 } /* }}} int post_sleep_hook */
 972 #endif
 973
 974 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
 975                 __attribute__((unused)) int index)
 976 {
 977         double          latency;
 978         unsigned int    sequence;
 979         int             recv_ttl;
 980         uint8_t         recv_qos;
 981         char            recv_qos_str[16];
 982         size_t          buffer_len;
 983         size_t          data_len;
 984         ping_context_t *context;
 985
 986         latency = -1.0;
 987         buffer_len = sizeof (latency);
 988         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 989                         &latency, &buffer_len);
 990
 991         sequence = 0;
 992         buffer_len = sizeof (sequence);
 993         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 994                         &sequence, &buffer_len);
 995
 996         recv_ttl = -1;
 997         buffer_len = sizeof (recv_ttl);
 998         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 999                         &recv_ttl, &buffer_len);
1000
1001         recv_qos = 0;
1002         buffer_len = sizeof (recv_qos);
1003         ping_iterator_get_info (iter, PING_INFO_RECV_QOS,
1004                         &recv_qos, &buffer_len);
1005
1006         data_len = 0;
1007         ping_iterator_get_info (iter, PING_INFO_DATA,
1008                         NULL, &data_len);
1009
1010         context = (ping_context_t *) ping_iterator_get_context (iter);
1011
1012 #if USE_NCURSES
1013 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
1014 #else
1015 # define HOST_PRINTF(...) printf(__VA_ARGS__)
1016 #endif
1017
1018         context->req_sent++;
1019         if (latency > 0.0)
1020         {
1021                 context->req_rcvd++;
1022                 context->latency_total += latency;
1023                 context->latency_total_square += (latency * latency);
1024
1025                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
1026                         context->latency_max = latency;
1027                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
1028                         context->latency_min = latency;
1029
1030 #if USE_NCURSES
1031                 if (has_colors () == TRUE)
1032                 {
1033                         int color = OPING_GREEN;
1034                         double average = context_get_average (context);
1035                         double stddev = context_get_stddev (context);
1036
1037                         if ((latency < (average - (2 * stddev)))
1038                                         || (latency > (average + (2 * stddev))))
1039                                 color = OPING_RED;
1040                         else if ((latency < (average - stddev))
1041                                         || (latency > (average + stddev)))
1042                                 color = OPING_YELLOW;
1043
1044                         HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
1045                                         data_len, context->host, context->addr,
1046                                         sequence, recv_ttl,
1047                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1048                         if ((recv_qos != 0) || (opt_send_qos != 0))
1049                         {
1050                                 HOST_PRINTF ("qos=%s ",
1051                                                 format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1052                         }
1053                         HOST_PRINTF ("time=");
1054                         wattron (main_win, COLOR_PAIR(color));
1055                         HOST_PRINTF ("%.2f", latency);
1056                         wattroff (main_win, COLOR_PAIR(color));
1057                         HOST_PRINTF (" ms\n");
1058                 }
1059                 else
1060                 {
1061 #endif
1062                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i ",
1063                                 data_len,
1064                                 context->host, context->addr,
1065                                 sequence, recv_ttl);
1066                 if ((recv_qos != 0) || (opt_send_qos != 0))
1067                 {
1068                         HOST_PRINTF ("qos=%s ",
1069                                         format_qos (recv_qos, recv_qos_str, sizeof (recv_qos_str)));
1070                 }
1071                 HOST_PRINTF ("time=%.2f ms\n", latency);
1072 #if USE_NCURSES
1073                 }
1074 #endif
1075         }
1076         else
1077         {
1078 #if USE_NCURSES
1079                 if (has_colors () == TRUE)
1080                 {
1081                         HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
1082                                         context->host, context->addr,
1083                                         sequence);
1084                         wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
1085                         HOST_PRINTF ("timeout");
1086                         wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
1087                         HOST_PRINTF ("\n");
1088                 }
1089                 else
1090                 {
1091 #endif
1092                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
1093                                 context->host, context->addr,
1094                                 sequence);
1095 #if USE_NCURSES
1096                 }
1097 #endif
1098         }
1099
1100 #if USE_NCURSES
1101         update_stats_from_context (context, iter);
1102         wrefresh (main_win);
1103 #endif
1104 } /* }}} void update_host_hook */
1105
1106 static int post_loop_hook (pingobj_t *ping) /* {{{ */
1107 {
1108         pingobj_iter_t *iter;
1109
1110 #if USE_NCURSES
1111         endwin ();
1112 #endif
1113
1114         for (iter = ping_iterator_get (ping);
1115                         iter != NULL;
1116                         iter = ping_iterator_next (iter))
1117         {
1118                 ping_context_t *context;
1119
1120                 context = ping_iterator_get_context (iter);
1121
1122                 printf ("\n--- %s ping statistics ---\n"
1123                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
1124                                 context->host, context->req_sent, context->req_rcvd,
1125                                 context_get_packet_loss (context),
1126                                 context->latency_total);
1127
1128                 if (context->req_rcvd != 0)
1129                 {
1130                         double average;
1131                         double deviation;
1132
1133                         average = context_get_average (context);
1134                         deviation = context_get_stddev (context);
1135
1136                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
1137                                         context->latency_min,
1138                                         average,
1139                                         context->latency_max,
1140                                         deviation);
1141                 }
1142
1143                 ping_iterator_set_context (iter, NULL);
1144                 context_destroy (context);
1145         }
1146
1147         return (0);
1148 } /* }}} int post_loop_hook */
1149
1150 int main (int argc, char **argv) /* {{{ */
1151 {
1152         pingobj_t      *ping;
1153         pingobj_iter_t *iter;
1154
1155         struct sigaction sigint_action;
1156
1157         struct timeval  tv_begin;
1158         struct timeval  tv_end;
1159         struct timespec ts_wait;
1160         struct timespec ts_int;
1161
1162         int optind;
1163         int i;
1164         int status;
1165 #if _POSIX_SAVED_IDS
1166         uid_t saved_set_uid;
1167
1168         /* Save the old effective user id */
1169         saved_set_uid = geteuid ();
1170         /* Set the effective user ID to the real user ID without changing the
1171          * saved set-user ID */
1172         status = seteuid (getuid ());
1173         if (status != 0)
1174         {
1175                 fprintf (stderr, "Temporarily dropping privileges "
1176                                 "failed: %s\n", strerror (errno));
1177                 exit (EXIT_FAILURE);
1178         }
1179 #endif
1180
1181         setlocale(LC_ALL, "");
1182         optind = read_options (argc, argv);
1183
1184 #if !_POSIX_SAVED_IDS
1185         /* Cannot temporarily drop privileges -> reject every file but "-". */
1186         if ((opt_filename != NULL)
1187                         && (strcmp ("-", opt_filename) != 0)
1188                         && (getuid () != geteuid ()))
1189         {
1190                 fprintf (stderr, "Your real and effective user IDs don't "
1191                                 "match. Reading from a file (option '-f')\n"
1192                                 "is therefore too risky. You can still read "
1193                                 "from STDIN using '-f -' if you like.\n"
1194                                 "Sorry.\n");
1195                 exit (EXIT_FAILURE);
1196         }
1197 #endif
1198
1199         if ((optind >= argc) && (opt_filename == NULL)) {
1200                 usage_exit (argv[0], 1);
1201         }
1202
1203         if ((ping = ping_construct ()) == NULL)
1204         {
1205                 fprintf (stderr, "ping_construct failed\n");
1206                 return (1);
1207         }
1208
1209         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
1210         {
1211                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
1212                                 opt_send_ttl, ping_get_error (ping));
1213         }
1214
1215         if (ping_setopt (ping, PING_OPT_QOS, &opt_send_qos) != 0)
1216         {
1217                 fprintf (stderr, "Setting TOS to %i failed: %s\n",
1218                                 opt_send_qos, ping_get_error (ping));
1219         }
1220
1221         {
1222                 double temp_sec;
1223                 double temp_nsec;
1224
1225                 temp_nsec = modf (opt_interval, &temp_sec);
1226                 ts_int.tv_sec  = (time_t) temp_sec;
1227                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
1228
1229                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
1230         }
1231
1232         if (opt_addrfamily != PING_DEF_AF)
1233                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
1234
1235         if (opt_srcaddr != NULL)
1236         {
1237                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
1238                 {
1239                         fprintf (stderr, "Setting source address failed: %s\n",
1240                                         ping_get_error (ping));
1241                 }
1242         }
1243
1244         if (opt_device != NULL)
1245         {
1246                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
1247                 {
1248                         fprintf (stderr, "Setting device failed: %s\n",
1249                                         ping_get_error (ping));
1250                 }
1251         }
1252
1253         if (opt_filename != NULL)
1254         {
1255                 FILE *infile;
1256                 char line[256];
1257                 char host[256];
1258
1259                 if (strcmp (opt_filename, "-") == 0)
1260                         /* Open STDIN */
1261                         infile = fdopen(0, "r");
1262                 else
1263                         infile = fopen(opt_filename, "r");
1264
1265                 if (infile == NULL)
1266                 {
1267                         fprintf (stderr, "Opening %s failed: %s\n",
1268                                         (strcmp (opt_filename, "-") == 0)
1269                                         ? "STDIN" : opt_filename,
1270                                         strerror(errno));
1271                         return (1);
1272                 }
1273
1274 #if _POSIX_SAVED_IDS
1275                 /* Regain privileges */
1276                 status = seteuid (saved_set_uid);
1277                 if (status != 0)
1278                 {
1279                         fprintf (stderr, "Temporarily re-gaining privileges "
1280                                         "failed: %s\n", strerror (errno));
1281                         exit (EXIT_FAILURE);
1282                 }
1283 #endif
1284
1285                 while (fgets(line, sizeof(line), infile))
1286                 {
1287                         /* Strip whitespace */
1288                         if (sscanf(line, "%s", host) != 1)
1289                                 continue;
1290
1291                         if ((host[0] == 0) || (host[0] == '#'))
1292                                 continue;
1293
1294                         if (ping_host_add(ping, host) < 0)
1295                         {
1296                                 const char *errmsg = ping_get_error (ping);
1297
1298                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
1299                                 continue;
1300                         }
1301                         else
1302                         {
1303                                 host_num++;
1304                         }
1305                 }
1306
1307 #if _POSIX_SAVED_IDS
1308                 /* Drop privileges */
1309                 status = seteuid (getuid ());
1310                 if (status != 0)
1311                 {
1312                         fprintf (stderr, "Temporarily dropping privileges "
1313                                         "failed: %s\n", strerror (errno));
1314                         exit (EXIT_FAILURE);
1315                 }
1316 #endif
1317
1318                 fclose(infile);
1319         }
1320
1321 #if _POSIX_SAVED_IDS
1322         /* Regain privileges */
1323         status = seteuid (saved_set_uid);
1324         if (status != 0)
1325         {
1326                 fprintf (stderr, "Temporarily re-gaining privileges "
1327                                 "failed: %s\n", strerror (errno));
1328                 exit (EXIT_FAILURE);
1329         }
1330 #endif
1331
1332         for (i = optind; i < argc; i++)
1333         {
1334                 if (ping_host_add (ping, argv[i]) < 0)
1335                 {
1336                         const char *errmsg = ping_get_error (ping);
1337
1338                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
1339                         continue;
1340                 }
1341                 else
1342                 {
1343                         host_num++;
1344                 }
1345         }
1346
1347         /* Permanently drop root privileges if we're setuid-root. */
1348         status = setuid (getuid ());
1349         if (status != 0)
1350         {
1351                 fprintf (stderr, "Dropping privileges failed: %s\n",
1352                                 strerror (errno));
1353                 exit (EXIT_FAILURE);
1354         }
1355
1356 #if _POSIX_SAVED_IDS
1357         saved_set_uid = (uid_t) -1;
1358 #endif
1359
1360         ping_initialize_contexts (ping);
1361
1362         if (i == 0)
1363                 return (1);
1364
1365         memset (&sigint_action, '\0', sizeof (sigint_action));
1366         sigint_action.sa_handler = sigint_handler;
1367         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1368         {
1369                 perror ("sigaction");
1370                 return (1);
1371         }
1372
1373         pre_loop_hook (ping);
1374
1375         while (opt_count != 0)
1376         {
1377                 int index;
1378                 int status;
1379
1380                 if (gettimeofday (&tv_begin, NULL) < 0)
1381                 {
1382                         perror ("gettimeofday");
1383                         return (1);
1384                 }
1385
1386                 if (ping_send (ping) < 0)
1387                 {
1388                         fprintf (stderr, "ping_send failed: %s\n",
1389                                         ping_get_error (ping));
1390                         return (1);
1391                 }
1392
1393                 index = 0;
1394                 for (iter = ping_iterator_get (ping);
1395                                 iter != NULL;
1396                                 iter = ping_iterator_next (iter))
1397                 {
1398                         update_host_hook (iter, index);
1399                         index++;
1400                 }
1401
1402                 pre_sleep_hook (ping);
1403
1404                 /* Don't sleep in the last iteration */
1405                 if (opt_count == 1)
1406                         break;
1407
1408                 if (gettimeofday (&tv_end, NULL) < 0)
1409                 {
1410                         perror ("gettimeofday");
1411                         return (1);
1412                 }
1413
1414                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1415
1416                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1417                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1418                 {
1419                         if (errno != EINTR)
1420                         {
1421                                 perror ("nanosleep");
1422                                 break;
1423                         }
1424                         else if (opt_count == 0)
1425                         {
1426                                 /* sigint */
1427                                 break;
1428                         }
1429                 }
1430
1431                 post_sleep_hook (ping);
1432
1433                 if (opt_count > 0)
1434                         opt_count--;
1435         } /* while (opt_count != 0) */
1436
1437         post_loop_hook (ping);
1438
1439         ping_destroy (ping);
1440
1441         return (0);
1442 } /* }}} int main */
1443
1444 /* vim: set fdm=marker : */